Prof. Roland Winston Profile

Prof. Roland Winston

Professor

SPIE Involvement:

Conference Chair | Track Chair | Editor | Author | Instructor

Publications (94)

Proceedings Article | 4 October 2024 Presentation

Asymmetric roof integrated seasonal enhancing nonimaging (ARISEN) optics

Roland Winston, Robyn Lukens, Yogesh Bhusal, Lun Jiang, Christian Moe

Proceedings Volume PC13132, PC1313202 (2024) https://doi.org/10.1117/12.3029993

KEYWORDS: Nonimaging optics, Integrated optics, Sun

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Proceedings Article | 2 October 2024 Presentation

A visual tour through the nonimaging optics literature

Håkon J. D. Johnsen, Thomas Cooper, Lun Jiang, Lien Smeesters, Roland Winston

Proceedings Volume PC13132, PC1313201 (2024) https://doi.org/10.1117/12.3028858

KEYWORDS: Nonimaging optics, Visualization, Visual process modeling, Optics manufacturing, Manufacturing, Design, Data analysis

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Proceedings Article | 18 September 2020 Presentation + Paper

Preliminary experimental results of a novel low cost solar thermal collector with integrated optics for desalination processes

Jordyn Brinkley, Bennett Widyolar, Lun Jiang, Yogesh Bhusal, Gerardo Diaz, James Palko, Roland Winston

Proceedings Volume 11495, 114950N (2020) https://doi.org/10.1117/12.2570837

KEYWORDS: Nonimaging optics, Solar thermal energy, Solar processes, Compound parabolic concentrators, Optical design

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Proceedings Article | 16 September 2020 Paper

Progress in the development of two stage concentrated (53X) parabolic trough solar thermal collector

Yogesh Bhusal, Bennett Widyolar, Lun Jiang, Jordyn Brinkley, Roland Winston, David Cygan, Hamid Abbasi

Proceedings Volume 11495, 114950M (2020) https://doi.org/10.1117/12.2570781

KEYWORDS: Receivers, Solar concentrators

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SPIE Journal Paper | 2 September 2020

Design method toward creating a three-dimensional asymmetric compound parabolic concentrator

Jonathan Ferry, Roland Winston

JPE, Vol. 10, Issue 03, 037001, (September 2020) https://doi.org/10.1117/12.10.1117/1.JPE.10.037001

KEYWORDS: Compound parabolic concentrators, Solar concentrators, Nonimaging optics, Spherical lenses, Receivers, Lithium, Thermodynamics, 3D imaging standards, Solids, Optical design

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Proceedings Article | 21 August 2020 Presentation + Paper

External compound parabolic concentrator (XCPC) for decarbonizing industrial processing heat

Bennett Widyolar, Lun Jiang, Jordyn Brinkley, Yogesh Bhusal, Jonathan Ferry, Roland Winston

Proceedings Volume 11495, 114950T (2020) https://doi.org/10.1117/12.2570839

KEYWORDS: Vacuum tubes, Solar thermal energy, Compound parabolic concentrators, Solar energy, Reflectors, Absorption, Solar processes, Nonimaging optics, Thermal energy technology

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Proceedings Article | 21 August 2020 Presentation

Vector potential and its power on explaining ideal nonimaging optics

Lun Jiang, Roland Winston

Proceedings Volume 11495, 1149505 (2020) https://doi.org/10.1117/12.2569366

KEYWORDS: Nonimaging optics, Thermodynamics

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Proceedings Article | 20 August 2020 Presentation

Opening remarks to Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVII

Roland Winston

Proceedings Volume 11495, 1149502 (2020) https://doi.org/10.1117/12.2581521

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Proceedings Article | 20 August 2020 Presentation + Paper

Hamiltonian formulation of flowlines, first step for Wigner formalism analysis

Angel García-Botella, Lun Jiang, Roland Winston

Proceedings Volume 11495, 114950I (2020) https://doi.org/10.1117/12.2567901

KEYWORDS: Geometrical optics, Particles, Nonimaging optics, Photometry, Confocal microscopy, Surface properties, Spherical lenses, Radio propagation, Light sources

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Proceedings Article | 20 August 2020 Presentation + Paper

Advances in flowline simulations: virtual source computation method

Angel García-Botella, Lun Jiang, Roland Winston

Proceedings Volume 11495, 1149506 (2020) https://doi.org/10.1117/12.2567874

KEYWORDS: Interfaces, Reflectivity, Virtual reality, Sensors, Computer simulations, Optical design, Refractive index, Refraction, Reflectors, Geometrical optics

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Proceedings Article | 20 August 2020 Presentation

Searching for a better way to concentrate light

Roland Winston, Lun Jiang, Davoud Masoumi

Proceedings Volume 11495, 1149503 (2020) https://doi.org/10.1117/12.2569882

KEYWORDS: Radio optics, Thermography, Thermodynamics

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Proceedings Article | 20 August 2020 Presentation + Paper

Low cost solar photovoltaic-thermal (PVT) collector using aluminum minichannels and nonimaging optics

Bennett Widyolar, Lun Jiang, Jordyn Brinkley, Sai Kiran Hota, Jonathan Ferry, Gerardo Diaz, Roland Winston

Proceedings Volume 11495, 114950O (2020) https://doi.org/10.1117/12.2570838

KEYWORDS: Photovoltaics, Solar energy, Solar cells, Nonimaging optics, Aluminum, Glasses, Diamond, Carbon dioxide, Thermal efficiency

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Proceedings Article | 9 September 2019 Paper

High concentration parabolic trough solar collector with novel secondary reflector in the vacuum receiver

Yogesh Bhusal, Bennett Widyolar, Lun Jiang, Jonathan Ferry, Jordyn Brinkley, Roland Winston

Proceedings Volume 11120, 1112004 (2019) https://doi.org/10.1117/12.2530584

KEYWORDS: Receivers, Reflectors, Solar concentrators, Ray tracing, Thermal efficiency, Reflectivity, Geometrical optics

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Proceedings Article | 9 September 2019 Presentation + Paper

Advances in flowline simulations

Ángel García-Botella, Lun Jiang, Roland Winston

Proceedings Volume 11120, 111200C (2019) https://doi.org/10.1117/12.2530080

KEYWORDS: Sensors, Reflectivity, Computing systems, Optical design, Geometrical optics, Solar concentrators, Optical simulations, Light sources, 3D modeling, Optical components

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Proceedings Article | 9 September 2019 Presentation

The vector potential of flow line and nonimaging optics (Conference Presentation)

Lun Jiang, Roland Winston, Ángel Botella

Proceedings Volume 11120, 111200J (2019) https://doi.org/10.1117/12.2531781

KEYWORDS: Nonimaging optics, Optical design, Thermodynamics

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Proceedings Article | 9 September 2019 Presentation

Gauge invariance in flow line optics (Conference Presentation)

Roland Winston, Lun Jiang

Proceedings Volume 11120, 111200I (2019) https://doi.org/10.1117/12.2531844

KEYWORDS: Nonimaging optics, Optical design

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Proceedings Article | 9 September 2019 Paper

Nonimaging solar collectors toward net-zero GHG emission

Bennett Widyolar, Lun Jiang, Jonathan Ferry, Jordyn Brinkley, Yogesh Bhusal, Roland Winston

Proceedings Volume 11120, 111200D (2019) https://doi.org/10.1117/12.2534513

KEYWORDS: Solar energy, Solar thermal energy, Carbon monoxide, Manufacturing, Thermal efficiency, Compound parabolic concentrators, Solar cells, Agriculture, Solar processes, Renewable energy

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Proceedings Article | 18 September 2018 Presentation

The vector potential for rotationally symmetric flow lines (Conference Presentation)

Roland Winston, Lun Jiang

Proceedings Volume 10758, 107580D (2018) https://doi.org/10.1117/12.2323210

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Proceedings Article | 18 September 2018 Presentation

Flowline design and thermodynamic implications of the vector potential (Conference Presentation)

Lun Jiang, Roland Winston

Proceedings Volume 10758, 107580C (2018) https://doi.org/10.1117/12.2323208

KEYWORDS: Thermodynamics, Nonimaging optics, Physics

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Proceedings Article | 14 September 2018 Paper

Two-stage 50X hybrid spectrum splitting CSP/CPV collector with InGaP/GaAs solar cells

Bennett Widyolar, Lun Jiang, Jon Ferry, Roland Winston, Alexander Kirk, Mark Osowski, David Cygan, Hamid Abbasi

Proceedings Volume 10758, 1075806 (2018) https://doi.org/10.1117/12.2323341

KEYWORDS: Solar cells, Solar energy, Compound parabolic concentrators, Reflectors, Prototyping, Particles, Solar concentrators, Photovoltaics

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Proceedings Article | 14 September 2018 Presentation + Paper

Ray tracing and heat transfer simulation of novel glass-covered XCPC collector

Yogesh Bhusal, Ali Hassanzadeh, Roland Winston

Proceedings Volume 10758, 1075808 (2018) https://doi.org/10.1117/12.2323121

KEYWORDS: Compound parabolic concentrators, Glasses, Nonimaging optics, Ray tracing, Reflectors, Geometrical optics, Solar concentrators, Solar thermal energy, Optical components, Reflectivity

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Proceedings Article | 14 September 2018 Presentation + Paper

Nonimaging optics applications in theater lighting

Jonathan Ferry, Roland Winston, Richard Flasck

Proceedings Volume 10758, 107580B (2018) https://doi.org/10.1117/12.2323332

KEYWORDS: Compound parabolic concentrators, Light emitting diodes, Light sources and illumination, Nonimaging optics, Computer aided design, LED lighting, Receivers, Reflectors, Prototyping, Lens design

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Proceedings Article | 14 September 2018 Presentation + Paper

Flowline analysis of eténdue transfer of a wide-angle solar concentrator

Jordyn Brinkley, Lun Jiang, Bennett Widyolar, Roland Winston

Proceedings Volume 10758, 107580K (2018) https://doi.org/10.1117/12.2323344

KEYWORDS: Reflection, Solar cells, Glasses, Solar concentrators, Solar energy, Nonimaging optics, Optical simulations, Solar thermal energy, Channel projecting optics, Receivers

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Proceedings Article | 14 September 2018 Presentation + Paper

Optical simulation-based on flowline method

Angel García-Botella, Lun Jiang, Roland Winston

Proceedings Volume 10758, 107580F (2018) https://doi.org/10.1117/12.2500931

KEYWORDS: Computing systems, Optical simulations, Solar concentrators, Optical design, Reflectivity, Nonimaging optics, Light sources, Algorithm development, Computer simulations

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Proceedings Article | 19 September 2017 Presentation

The error tolerance of nonimaging optic systems (Conference Presentation)

Ali Hassanzadeh, Bennett Widyolar, Lun Jiang, Roland Winston

Proceedings Volume 10379, 103790M (2017) https://doi.org/10.1117/12.2276739

KEYWORDS: Nonimaging optics, Tolerancing, Thermography, Thermal analysis, Solar concentrators, Photovoltaics, Solar thermal energy

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Proceedings Article | 19 September 2017 Presentation

Étendue and angular acceptance of the asymmetric compound parabolic concentrator (Conference Presentation)

Melissa Ricketts, Roland Winston, Jonathan Ferry

Proceedings Volume 10379, 1037905 (2017) https://doi.org/10.1117/12.2276735

KEYWORDS: Compound parabolic concentrators, Ray tracing, Solar concentrators, Light emitting diodes

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Proceedings Article | 7 September 2017 Presentation + Paper

Optical performance effects of the misalignment of nonimaging optics solar collectors

Jonathan Ferry, Melissa Ricketts, Roland Winston

Proceedings Volume 10379, 1037907 (2017) https://doi.org/10.1117/12.2276712

KEYWORDS: Nonimaging optics, Compound parabolic concentrators, Solar thermal energy, Sun, Thermography, Ray tracing, Motion analysis, Optical design, Photovoltaics, Solar concentrators

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Proceedings Article | 7 September 2017 Presentation + Paper

How the Hilbert integral theorem inspired flow lines

Roland Winston, Lun Jiang

Proceedings Volume 10379, 1037903 (2017) https://doi.org/10.1117/12.2276709

KEYWORDS: Nonimaging optics, Thermodynamics, Geometrical optics, Solar concentrators, Wavefronts, Thermography, Mirrors, Optical components, Refractive index, Chemical elements

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Proceedings Article | 7 September 2017 Presentation + Paper

Thermodynamic investigation of the segmented CPC

Bennett Widyolar, Lun Jiang, Roland Winston

Proceedings Volume 10379, 103790L (2017) https://doi.org/10.1117/12.2276711

KEYWORDS: Geometrical optics, Solar concentrators, Thermodynamics, Compound parabolic concentrators, Thermography, Numerical analysis, Nonimaging optics, Radiative transfer, Photovoltaics, Solar thermal energy

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SPIE Journal Paper | 29 June 2017

Étendue and angular acceptance of the asymmetric compound parabolic concentrator

Melissa Ricketts, Roland Winston, Jonathan Ferry

JPE, Vol. 7, Issue 02, 028003, (June 2017) https://doi.org/10.1117/12.10.1117/1.JPE.7.028003

KEYWORDS: Compound parabolic concentrators, Ray tracing, Visualization

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SPIE Journal Paper | 4 April 2017

Thermodynamics and the segmented compound parabolic concentrator

Bennett Widyolar, Lun Jiang, Roland Winston

JPE, Vol. 7, Issue 02, 028002, (April 2017) https://doi.org/10.1117/12.10.1117/1.JPE.7.028002

KEYWORDS: Compound parabolic concentrators, Solar concentrators, Thermodynamics, Thermography, Reflectors, Geometrical optics, Nonimaging optics, Transmittance, Visualization, Energy efficiency

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SPIE Journal Paper | 28 December 2016 Open Access

Thermodynamic origin of nonimaging optics

Lun Jiang, Roland Winston

JPE, Vol. 6, Issue 04, 047003, (December 2016) https://doi.org/10.1117/12.10.1117/1.JPE.6.047003

KEYWORDS: Ray tracing, Solar concentrators, Nonimaging optics, Thermodynamics, Thermography, Mirrors, Geometrical optics, Compound parabolic concentrators, Optical design, Radiative energy transfer

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Proceedings Article | 14 September 2016 Presentation + Paper

Flow line asymmetric nonimaging concentrating optics

Lun Jiang, Roland Winston

Proceedings Volume 9955, 99550I (2016) https://doi.org/10.1117/12.2239176

KEYWORDS: Photovoltaics, Solar concentrators, Nonimaging optics, Geometrical optics, Compound parabolic concentrators, Thermodynamics, Thermography, Radiative energy transfer, Optical design, Mirrors

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Proceedings Article | 8 September 2016 Presentation + Paper

How nonimaging optics began

Roland Winston

Proceedings Volume 9955, 995502 (2016) https://doi.org/10.1117/12.2239175

KEYWORDS: Nonimaging optics, Solar concentrators, Atmospheric Cherenkov telescopes, Thermodynamics, Mirrors, Thermography, Compound parabolic concentrators, Solar energy, Geometrical optics, Sensors

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Proceedings Article | 7 September 2016 Presentation + Paper

Nonimaging optics in lighting to reduce light pollution

Melissa Ricketts, Jon Ferry, Lun Jiang, Roland Winston

Proceedings Volume 9955, 99550G (2016) https://doi.org/10.1117/12.2239506

KEYWORDS: Light emitting diodes, Pollution, Nonimaging optics, Light, Light sources and illumination, Optical design, Compound parabolic concentrators, Reflectors, Computer aided design, Reflectivity

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Proceedings Article | 7 September 2016 Presentation + Paper

Nonimaging optics maximizing exergy for hybrid solar system

Roland Winston, Lun Jiang, Mahmoud Abdelhamid, Bennett Widyolar, Jonathan Ferry, David Cygan, Hamid Abbasi, Alexandr Kozlov, Alexander Kirk, Victor Elarde, Mark Osowski

Proceedings Volume 9955, 99550N (2016) https://doi.org/10.1117/12.2239139

KEYWORDS: Solar cells, Nonimaging optics, Receivers, Compound parabolic concentrators, Reflectors, Mirrors, Solar concentrators, Coating, Solar energy, Photons

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Proceedings Article | 28 August 2015 Paper

Asymmetric design for Compound Elliptical Concentrators (CEC) and its geometric flux implications

Lun Jiang, Roland Winston

Proceedings Volume 9572, 957203 (2015) https://doi.org/10.1117/12.2191948

KEYWORDS: Solar concentrators, Thermodynamics, Nonimaging optics, Compound parabolic concentrators, Black bodies, Transformers, Radiative energy transfer, Optical design, Current controlled current source, Wavefronts

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Proceedings Article | 25 August 2015 Paper

String method of nonimaging optics from a radiation theory perspective

Boe Colabewala, Lun Jiang, Roland Winston

Proceedings Volume 9572, 957202 (2015) https://doi.org/10.1117/12.2191946

KEYWORDS: Solar concentrators, Nonimaging optics, Probability theory, Optical design, Thermodynamics, Radiative transfer, Geometrical optics, Solids, Solar radiation, Roads

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Proceedings Article | 25 August 2015 Paper

Diffraction effects in freeform optics

Melissa Ricketts, Roland Winston, Vladimir Oliker

Proceedings Volume 9572, 95720O (2015) https://doi.org/10.1117/12.2191895

KEYWORDS: Diffraction, Freeform optics, Ray tracing, Geometrical optics, Prototyping, Optical design, Far-field diffraction, Roads, LED lighting, Image quality

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Proceedings Article | 25 August 2015 Paper

Hybrid solar collector using nonimaging optics and photovoltaic components

Roland Winston, Eli Yablonovitch, Lun Jiang, Bennett Widyolar, Mahmoud Abdelhamid, Gregg Scranton, David Cygan, Alexandr Kozlov

Proceedings Volume 9572, 957208 (2015) https://doi.org/10.1117/12.2191943

KEYWORDS: Gallium arsenide, Solar cells, Solar energy, Receivers, Reflectors, Photovoltaics, Nonimaging optics, Particles, Compound parabolic concentrators, Mirrors

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Proceedings Article | 19 September 2014 Paper

Problems and challenges in non-imaging optics

Roland Winston, Lun Jiang

Proceedings Volume 9191, 91910B (2014) https://doi.org/10.1117/12.2065249

KEYWORDS: Nonimaging optics, Solar concentrators, Thermodynamics, Energy efficiency, Sun, Mirrors, Radiative energy transfer, Optical design, Current controlled current source, Refraction

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Proceedings Article | 9 September 2014 Paper

Novel aplanatic designs for LED concentration

Melissa Ricketts, Roland Winston, Lun Jiang

Proceedings Volume 9191, 91910C (2014) https://doi.org/10.1117/12.2065247

KEYWORDS: Coating, Light emitting diodes, Mirrors, Prototyping, Solar concentrators, Light, Semiconductors, Ray tracing, MATLAB, Manufacturing

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Proceedings Article | 9 September 2014 Paper

Nonimaging optics heating up Mongolia's harsh winter

Roland Winston, Bennett Widyolar, Lun Jiang

Proceedings Volume 9191, 91910D (2014) https://doi.org/10.1117/12.2065269

KEYWORDS: Nonimaging optics, Buildings, Air contamination, Solar energy, Lead, Testing and analysis, Minerals, Calorimetry, Roads, Combustion

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Proceedings Article | 18 September 2013 Paper

Hamilton optics: transformational theory of optics

Roland Winston, Wenjun Ge

Proceedings Volume 8834, 883402 (2013) https://doi.org/10.1117/12.2027837

KEYWORDS: Nonimaging optics, Thermography, Wavelets, Wavefronts, Mechanics, Quantum mechanics, Quantum physics, Wave propagation, Light, Germanium

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Proceedings Article | 18 September 2013 Paper

Improvement of the light extraction efficiency in light emitting diodes (LEDs) using ray trace

Melissa Ricketts, Roland Winston

Proceedings Volume 8834, 88340O (2013) https://doi.org/10.1117/12.2027891

KEYWORDS: Light emitting diodes, Semiconductors, Photons, Compound parabolic concentrators, Ray tracing, Interfaces, Refraction, Black bodies, Monte Carlo methods, Epoxies

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Proceedings Article | 11 October 2012 Paper

Thermodynamically efficient solar concentrators

Roland Winston

Proceedings Volume 8485, 848502 (2012) https://doi.org/10.1117/12.931727

KEYWORDS: Nonimaging optics, Thermodynamics, Probability theory, Solar concentrators, Thermography, Photovoltaics, Information theory, Sun, Solar cells, Solar energy

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Proceedings Article | 11 October 2012 Paper

Solar receiver with integrated optics

Lun Jiang, Roland Winston

Proceedings Volume 8485, 84850D (2012) https://doi.org/10.1117/12.931726

KEYWORDS: Solar cells, Ray tracing, Solar concentrators, Receivers, Sun, Thermal efficiency, Thin films, Solar energy, Glasses, Integrated optics

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SPIE Journal Paper | 27 April 2012

Thermodynamically efficient solar concentrators

Roland Winston

JPE, Vol. 2, Issue 1, 025501, (April 2012) https://doi.org/10.1117/12.10.1117/1.JPE.2.025501

KEYWORDS: Nonimaging optics, Solar concentrators, Thermodynamics, Compound parabolic concentrators, Thermography, Solar cells, Photovoltaics, Sun, Information theory, Light

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Proceedings Article | 23 September 2011 Paper

Optical design and efficiency improvement for organic luminescent solar concentrators

Chunhua Wang, Linda Hirst, Roland Winston

Proceedings Volume 8124, 81240O (2011) https://doi.org/10.1117/12.899366

KEYWORDS: Solar cells, Diffusers, Photovoltaics, Solar concentrators, Refractive index, Optical design, Solar energy, Absorption, Waveguides, Molecules

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Proceedings Article | 21 September 2011 Paper

Thermodynamically efficient solar concentrators

Roland Winston

Proceedings Volume 8124, 812409 (2011) https://doi.org/10.1117/12.899364

KEYWORDS: Nonimaging optics, Thermodynamics, Thermography, Solar concentrators, Sun, Solar cells, Black bodies, Photovoltaics, Optical design, Image compression

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SPIE Journal Paper | 1 January 2011

Size- and structure-dependent efficiency enhancement for luminescent solar concentrators

Chunhua Wang, Roland Winston, Weiya Zhang, David Pelka, Sue Carter

JPE, Vol. 1, Issue 1, 015502, (January 2011) https://doi.org/10.1117/12.10.1117/1.3534864

KEYWORDS: Solar cells, Diffusers, Solar concentrators, Absorption, Polymethylmethacrylate, Energy efficiency, Refractive index, Photovoltaics, Solids, Geometrical optics

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SPIE Journal Paper | 1 January 2011

Simple Köhler homogenizers for image-forming solar concentrators

Roland Winston, Weiya Zhang

JPE, Vol. 1, Issue 1, 015503, (January 2011) https://doi.org/10.1117/12.10.1117/1.3565187

KEYWORDS: Solar concentrators, Sun, Receivers, Solar cells, Thermodynamics, Fresnel lenses, Aspheric lenses, Light sources, Nonimaging optics, Mirrors

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SPIE Journal Paper | 1 January 2011

Publisher's Note: Journal of Photonics for Energy, Volume 1

Sue Carter, Netanel Bar-David, Chunhua Wang, Roland Winston, Weiya Zhang, David Pelka, Ohad Fixler, Zeev Zalevsky

JPE, Vol. 1, Issue 1, 010102, (January 2011) https://doi.org/10.1117/12.10.1117/1.3567199

Proceedings Article | 9 September 2010 Paper

IODC 2010 illumination design problem

Roland Winston, Narkis Shatz, Josh Cobb, Paul Michaloski, Vladimir Oliker

Proceedings Volume 7652, 76522J (2010) https://doi.org/10.1117/12.873301

KEYWORDS: Sensors, Dielectrics, Solar concentrators, GRIN lenses, Reflectivity, Mirrors, Light, Light sources and illumination, Refractive index, Absorption

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Proceedings Article | 24 August 2010 Paper

Design and performance of nanostructure-based luminescent solar concentrators

G. Shcherbatyuk, R. Inman, R. Winston, S. Ghosh

Proceedings Volume 7769, 776908 (2010) https://doi.org/10.1117/12.861027

KEYWORDS: Lead, Solar concentrators, Solar cells, Solar energy, Absorption, Near infrared, Quantum dots, Photovoltaics, Physics, Renewable energy

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Proceedings Article | 19 August 2010 Paper

Simple Köhler homogenizers for image-forming solar concentrators

Weiya Zhang, Roland Winston

Proceedings Volume 7785, 77850E (2010) https://doi.org/10.1117/12.863251

KEYWORDS: Solar concentrators, Sun, Receivers, Solar cells, Fresnel lenses, Aspheric lenses, Thermodynamics, Geometrical optics, Reflection, Nonimaging optics

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Proceedings Article | 19 August 2010 Paper

Optical enhancement for luminescent solar concentrators

Chunhua Wang, Roland Winston, Weiya Zhang, Dave Pelka, Sue Carter

Proceedings Volume 7785, 77850D (2010) https://doi.org/10.1117/12.863250

KEYWORDS: Solar cells, Diffusers, Solar concentrators, Absorption, Polymethylmethacrylate, Rhodium, Geometrical optics, Photovoltaics, Dye lasers, Optical design

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Proceedings Article | 19 August 2010 Paper

Design principles of the first 4x fixed solar concentrator

Roland Winston, Weiya Zhang

Proceedings Volume 7785, 77850B (2010) https://doi.org/10.1117/12.863248

KEYWORDS: Solar concentrators, Sun, Compound parabolic concentrators, Dielectrics, Refractive index, Nonimaging optics, Thermodynamics, Manufacturing, Photovoltaics, Optical design

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Proceedings Article | 19 August 2010 Paper

Efficiency improvement by near infrared quantum dots for luminescent solar concentrators

Chunhua Wang, Georgiy Shcherbatyuk, Richard Inman, Dave Pelka, Weiya Zhang, Yvonne Rodriguez, Sue Carter, Roland Winston, Sayantani Ghosh

Proceedings Volume 7772, 77720G (2010) https://doi.org/10.1117/12.860094

KEYWORDS: Lead, Solar cells, Absorption, Quantum dots, Rhodium, Near infrared, Solar concentrators, Solar energy, Glasses, Quantum efficiency

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Proceedings Article | 29 August 2009 Paper

Beating the optical Liouville theorem: How does geometrical optics know the second law of thermodynamics?

Roland Winston, Chunhua Wang, Weiya Zhang

Proceedings Volume 7423, 742309 (2009) https://doi.org/10.1117/12.836029

KEYWORDS: Geometrical optics, Thermodynamics, Thermography, Solar concentrators, Nonimaging optics, Sun, Photons, Astronomical imaging, Optical design, Quantum dots

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Proceedings Article | 29 August 2009 Paper

Novel aplanatic design method

Weiya Zhang, Roland Winston

Proceedings Volume 7423, 742306 (2009) https://doi.org/10.1117/12.836028

KEYWORDS: Optical spheres, Mirrors, Monochromatic aberrations, Nonimaging optics, Reflection, Imaging systems, Refraction, Geometrical optics, Optical imaging, Optical design

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Proceedings Article | 21 August 2009 Paper

Thermodynamic efficiency of nonimaging concentrators

Narkis Shatz, John Bortz, Roland Winston

Proceedings Volume 7423, 742308 (2009) https://doi.org/10.1117/12.824195

KEYWORDS: Thermodynamics, Solar concentrators, Thermography, Nonimaging optics, Solar cells, Projection systems, Geometrical optics, Photovoltaics, Solar energy, Gold

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Proceedings Article | 2 September 2008 Paper

Aplanatism and nonimaging optics

Roland Winston, Weiya Zhang

Proceedings Volume 7059, 70590B (2008) https://doi.org/10.1117/12.813936

KEYWORDS: Solar concentrators, Nonimaging optics, Monochromatic aberrations, Imaging systems, Optical spheres, Geometrical optics, Optical imaging, Optical design, Ray tracing, Optical aberrations

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Proceedings Article | 18 September 2007 Paper

Field results of a Kohler integrating photovoltaic system

Luke Reed, Roland Winston, Alexander Ritschel

Proceedings Volume 6670, 667006 (2007) https://doi.org/10.1117/12.740336

KEYWORDS: Mirrors, Solar concentrators, Prototyping, Sun, Photovoltaics, Glasses, Silver, Automatic tracking, Tolerancing, Optical components

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Proceedings Article | 3 October 2006 Paper

String paradigm in nonimaging optics

Roland Winston, Pablo Benítez

Proceedings Volume 6338, 633804 (2006) https://doi.org/10.1117/12.684716

KEYWORDS: Relays, Black bodies, Nonimaging optics, Mirrors, Geometrical optics, Bromine, Image segmentation, Free space optics, Lithium, Statistical optics

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Proceedings Article | 8 September 2006 Paper

Second-generation PVCC design with a dielectric light injector and polyhedron interior cavity

Ugur Ortabasi, Roland Winston, Scott Ellis

Proceedings Volume 6339, 63390C (2006) https://doi.org/10.1117/12.680077

KEYWORDS: Reflectivity, Solar concentrators, Dielectrics, Prototyping, Absorption, Beam splitters, Optical coatings, Computer simulations, Diffusers, Computer aided design

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Proceedings Article | 19 July 2006 Paper

High-concentration mirror-based Kohler integrating system for tandem solar cells

R. Winston, P. Benitez, A. Cvetkovic

Proceedings Volume 6342, 634213 (2006) https://doi.org/10.1117/12.692270

KEYWORDS: Solar concentrators, Mirrors, Sun, Optical design, Prototyping, Solar cells, System integration, Tandem solar cells, Computer aided design, Imaging systems

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Proceedings Article | 1 September 2005 Paper

Planar concentrators at the etendue limit

Roland Winston, Jeffrey Gordon

Proceedings Volume 5942, 59420H (2005) https://doi.org/10.1117/12.619579

KEYWORDS: Solar concentrators, Dielectrics, Photovoltaics, Sun, Mirrors, Nonimaging optics, Solar cells, Optical components, Geometrical optics, Optics manufacturing

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Proceedings Article | 20 August 2005 Paper

Realization of compact, passively-cooled, high-flux photovoltaic prototypes

Daniel Feuermann, Jeffrey Gordon, Steve Horne, Gary Conley, Roland Winston

Proceedings Volume 5942, 59420Q (2005) https://doi.org/10.1117/12.613082

KEYWORDS: Solar concentrators, Mirrors, Solar cells, Photovoltaics, Prototyping, Sun, Glasses, Optical design, Tolerancing, Imaging systems

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Proceedings Article | 29 September 2004 Paper

Radiance aa a paradigm for a wave description of optical measurements

Roland Winston, Yupin Sun, Robert Littlejohn, Keith Snail

Proceedings Volume 5529, (2004) https://doi.org/10.1117/12.562523

KEYWORDS: Sensors, Signal detection, Radiometry, Cameras, Optical testing, Diffraction, Correlation function, Spherical lenses, Black bodies, Wave propagation

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Proceedings Article | 29 September 2004 Paper

Nonimaging solar concentrator with uniform irradiance

Roland Winston, Joseph O'Gallagher, Randy Gee

Proceedings Volume 5529, (2004) https://doi.org/10.1117/12.561303

KEYWORDS: Solar concentrators, Solar cells, Nonimaging optics, Photovoltaics, Silica, Optical components, Solar energy, Geometrical optics, Tolerancing, Optical design

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Proceedings Article | 19 November 2001 Paper

Measuring radiance and the van-Cittert-Zernicke theorem (In memory of Vladimir Medvedev, formerly a member of the Vavilov Optical Science Institute, St. Petersburg [Leningrad], Russia)

Roland Winston, YuPin Sun, Robert Littlejohn

Proceedings Volume 4446, (2001) https://doi.org/10.1117/12.448811

KEYWORDS: Sensors, Radiometry, Signal detection, Optics, Signal processing, Collimators, Diffraction, Aerospace engineering, Statistical optics, Sun

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Proceedings Article | 19 November 2001 Paper

Experimental tests of radiative transfer incorporating statistical optics using blackbody sources

YuPin Sun, Roland Winston, Joseph O'Gallagher, Keith Snail

Proceedings Volume 4446, (2001) https://doi.org/10.1117/12.448817

KEYWORDS: Black bodies, Aerospace engineering, Radiative transfer, Geometrical optics, Statistical optics, Cameras, Sensors, Instrument modeling, Diffraction, Space operations

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Proceedings Article | 19 November 2001 Paper

Performance limitations of translationally symmetric nonimaging devices

John Bortz, Narkis Shatz, Roland Winston

Proceedings Volume 4446, (2001) https://doi.org/10.1117/12.448806

KEYWORDS: Solar concentrators, Geometrical optics, Compound parabolic concentrators, Nonimaging optics, Refractive index, Solids, Refraction, Optical components, Reflection, Chlorine

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Proceedings Article | 19 November 2001 Paper

Nonimaging solar concentrator with near-uniform irradiance for photovoltaic arrays

Joseph O'Gallagher, Roland Winston, Randy Gee

Proceedings Volume 4446, (2001) https://doi.org/10.1117/12.448830

KEYWORDS: Solar concentrators, Photovoltaics, Nonimaging optics, Solar cells, Tolerancing, Silica, Optical components, Solar energy, Geometrical optics, Optical design

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Proceedings Article | 6 October 1999 Paper

Advanced nonrotationally symmetric reflector for efficient and uniform illumination of rectangular apertures

John Bortz, Narkis Shatz, Roland Winston

Proceedings Volume 3781, (1999) https://doi.org/10.1117/12.368242

KEYWORDS: Solar concentrators, Reflectors, Stars, Projection systems, Light, Reflectivity, Reflector design, 3D acquisition, Optical design, Nonimaging optics

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Proceedings Article | 6 October 1999 Paper

Measuring radiance: a comparison of theory with experiment

YuPin Sun, Roland Winston, Keith Snail

Proceedings Volume 3781, (1999) https://doi.org/10.1117/12.368257

KEYWORDS: Geometrical optics, Correlation function, Radiometry, Black bodies, Statistical optics, Physics, Analytical research, Astatine, Absorption, Nonimaging optics

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Proceedings Article | 20 October 1998 Paper

Nonrotationally symmetric reflectors for efficient and uniform illumination of rectangular apertures

Narkis Shatz, John Bortz, Roland Winston

Proceedings Volume 3428, (1998) https://doi.org/10.1117/12.327960

KEYWORDS: Solar concentrators, Reflectors, Stars, Light, Projection systems, 3D acquisition, Optical design, LCDs, Reflectivity, Nonimaging optics

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Proceedings Article | 3 October 1997 Paper

Nonrotationally symmetric nonimaging systems that overcome the flux-transfer performance limit imposed by skewness conservation

Narkis Shatz, John Bortz, Harald Ries, Roland Winston

Proceedings Volume 3139, (1997) https://doi.org/10.1117/12.290226

KEYWORDS: Reflectors, Stars, Solar concentrators, 3D acquisition, Spherical lenses, Nonimaging optics, Light, Optical spheres, Reflectivity, Compound parabolic concentrators

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Proceedings Article | 3 October 1997 Paper

Manipulating the generalized radiance and measuring the instrument function

Robert Littlejohn, Yu Sun, Roland Winston

Proceedings Volume 3139, (1997) https://doi.org/10.1117/12.290227

KEYWORDS: Optical components, Aerospace engineering, Fourier transforms, Radiometry, Space operations, Matrices, Geometrical optics, Signal generators, Physics, Sun

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Proceedings Article | 1 November 1996 Paper

Tailored edge-ray design for illumination with extended sources

Ari Rabl, Jeffrey Gordon, Ong Teng, Harald Ries, Roland Winston

Proceedings Volume 2863, (1996) https://doi.org/10.1117/12.256230

KEYWORDS: Reflectors, Rubidium, Energy efficiency, Differential equations, Nonimaging optics, Optical design, Reflector design, Manufacturing, Geometrical optics, Lamps

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Proceedings Article | 21 August 1995 Paper

Nonimaging optics in direct view applications

Robert Emmons, Benjamin Jacobson, Robert Gengelbach, Roland Winston

Proceedings Volume 2538, (1995) https://doi.org/10.1117/12.216990

KEYWORDS: Compound parabolic concentrators, Polarizers, Spatial frequencies, Diffusers, Polarization, Nonimaging optics, Solar concentrators, LCDs, Dielectric polarization, Image enhancement

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Proceedings Article | 21 August 1995 Paper

Cone and trumpet concentrators in light of the general edge-ray theorem

Harald Ries, Wolfgang Spirkl, Roland Winston

Proceedings Volume 2538, (1995) https://doi.org/10.1117/12.216976

KEYWORDS: Reflectors, Optical spheres, Solar concentrators, Spherical lenses, Reflection, 3D acquisition, Physics, Visualization, Compound parabolic concentrators

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Proceedings Article | 21 August 1995 Paper

Nonimaging optics for nonuniform brightness distributions

David Jenkins, Roland Winston

Proceedings Volume 2538, (1995) https://doi.org/10.1117/12.216988

KEYWORDS: Solar concentrators, Reflectors, Mirrors, Nonimaging optics, Compound parabolic concentrators, Ray tracing, Tolerancing, Optical design, Sun, Thermodynamics

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Proceedings Article | 6 June 1995 Paper

High-brightness-solar-pumped Nd:YAG laser design

Mordechai Lando, David Jenkins, Hana Bernstein, Joseph O'Gallagher, Roland Winston, Allan Lewandowski

Proceedings Volume 2426, (1995) https://doi.org/10.1117/12.211229

KEYWORDS: Mirrors, Rod lasers, Resonators, Nd:YAG lasers, Laser development, Neodymium, Doping, Solar energy, Compound parabolic concentrators, Objectives

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Proceedings Article | 1 November 1993 Paper

Nonimaging reflectors as functionals of the desired irradiance

Roland Winston, Harald Ries

Proceedings Volume 2016, (1993) https://doi.org/10.1117/12.161934

KEYWORDS: Reflectors, Nonimaging optics, Geometrical optics, Mirrors, Reflector design, Spherical lenses, Reflectivity, Reflection, Solar concentrators, Physics

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Proceedings Article | 1 November 1993 Paper

Corrections to classical radiometry

Robert Littlejohn, Roland Winston

Proceedings Volume 2016, (1993) https://doi.org/10.1117/12.161946

KEYWORDS: Radiometry, Nonimaging optics, Correlation function, Diffraction, Ray tracing, Integral transforms, Geometrical optics, Physics, Quantum optics, Solids

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Proceedings Article | 1 November 1993 Paper

Flat-panel fluorescent lamp backlights with controlled illumination angle: backlighting optics at the thermodynamic limit

Benjamin Jacobson, Roland Winston

Proceedings Volume 2016, (1993) https://doi.org/10.1117/12.161942

KEYWORDS: Lamps, Thermodynamics, Thermography, Nonimaging optics, LCDs, Light sources, Optical design, Polonium, Absorption, Reflection

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Proceedings Article | 1 November 1993 Paper

Optimal nonimaging integrated evacuated solar collector

John Garrison, W. Duff, Joseph O'Gallagher, Roland Winston

Proceedings Volume 2016, (1993) https://doi.org/10.1117/12.161939

KEYWORDS: Solar energy, Glasses, Mirrors, Solar radiation, Copper, Nonimaging optics, Metals, Manufacturing, Energy efficiency, Sun

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Proceedings Article | 2 September 1992 Paper

Nonimaging optics design that are functionals of the acceptance angle

Roland Winston

Proceedings Volume 1779, (1992) https://doi.org/10.1117/12.140935

KEYWORDS: Nonimaging optics, Optical design, Lithium, Reflectors, Neodymium, Solids, Solar concentrators, Light, Stray light, Radiative transfer

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Nonimaging optics was d2vlop2d to solve a wll—posd but narrow s2t of probl2ms1. A prototjpical xampl is th concentration of a light beam with div2rgnc half—angl2 e and cross—s2ctional area A1 into th2 minimum possible area A1 without loss of throughput or convrslj, th design of illumination sstms that convert a lambrtian source into a beam with divrg2nc half—angle e and no stray light without loss of throughput. Two class2s of algorithms have bn found which solve ths probl2ms xactl or narftj so. Ths ar summarized hr; th details can b found in Rf.2. Th first is th "string' or 'dg2—raj" m2thod (the 'Hottl string is a useful construct for calculating radiative transfer b2tw22n lamb2rtian surfacs3). It maj b succinctly charactrizd as: I ndl = constant along a string. (1) Notice that replacing string b 'ra" gives all of imaging optics. Th second class of algorithms places rflctors along th2 lines of flow of a radiation fi2ld st up bj a radiating sourc2. In cases of high sjmmtrj such as a sph2r or disc, on obtains ideal solutions in both two and thr22 dim2nsions. In cithr case rflcting and somtims rfracting 2l2mnts ar shaped in specific wags in combination to solv2 th problem. Rcntlj I addr2ss2d a wider class of problems that could not b solved bj th old methods. Hr ar two xampls: It is w2ll— known that th2 far—field illuminance from a lamb2rtian source falls off with a power of the cosine of the radiating angle cx. For example, strip radiators produce a cos3cx illuminance on a distant plane, while circular disc radiators produce a cos4cx illuminance. But suppose one desires a predetermined far—field illuminance pattern e.g., uniform illuminance? The old designs will not suffice; thej simpftj transform a lambertian source radiating over 2'rr into a lambertian source radiating over a restricted set of angles. Another example is more technical. We recall1 that older nonimaging designs require that reflectors be positioned verj c1os to th source (or r2civr). Violating this ru1 introduccs undsirab1c structure in th radiating or angular accptanc2 pattern of th d2vic, tpica1ftj a dip in th forward direction. Th limitation o th old d2signs is that thj ar too static and d2pnd on a fw paramtrs such as, th area of th beam A1 and th div2rgnc2 angl2 e. 0n2 n2ds to introduce additional dgr2s of rdom into th nonimaging designs to solve a wider class of probIms. Th purpose of this communication is to indicate th lines along which this additional frdom can b introduced.

Proceedings Article | 24 October 1991 Paper

Nonimaging optics: optical design at the thermodynamic limit

Roland Winston

Proceedings Volume 1528, (1991) https://doi.org/10.1117/12.49125

KEYWORDS: Nonimaging optics, Thermodynamics, Reflectors, Electroluminescence, Optical design, Geometrical optics, Reflectivity, Stereolithography, Polonium, Thermography

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Proceedings Article | 24 October 1991 Paper

Thermodynamics of light concentrators

Harald Ries, Greg Smestad, Roland Winston

Proceedings Volume 1528, (1991) https://doi.org/10.1117/12.49126

KEYWORDS: Solar concentrators, Solids, Thermodynamics, Optical filters, Geometrical optics, Nonimaging optics, Solar energy, Quantum efficiency, Reflection, Semiconductors

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Proceedings Article | 24 October 1991 Paper

Very high temperature fiber processing and testing through the use of ultrahigh solar energy concentration

Benjamin Jacobson, Philip Gleckman, Robert Holman, Daniel Sagie, Roland Winston

Proceedings Volume 1528, (1991) https://doi.org/10.1117/12.49132

KEYWORDS: Solar concentrators, Temperature metrology, Tungsten, Optical design, Mirrors, Resistance, Nonimaging optics, Reflectors, Solar energy, Reflectivity

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Proceedings Article | 24 October 1991 Paper

Nonimaging concentrators for diode-pumped slab lasers

Philip Lacovara, Philip Gleckman, Robert Holman, Roland Winston

Proceedings Volume 1528, (1991) https://doi.org/10.1117/12.49138

KEYWORDS: Solar concentrators, Semiconductor lasers, Diodes, Nd:YAG lasers, Nonimaging optics, Polishing, Surface finishing, Reflectivity, Gold, Mirrors

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Showing 5 of 94 publications

Proceedings Volume Editor (28)

SPIE Conference Volume | 14 October 2024

Nonimaging Optics: Efficient Design for Illumination and Concentration XIX

SPIE Conference Volume | 19 October 2022

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVIII

SPIE Conference Volume | 29 September 2020

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVII

SPIE Conference Volume | 4 October 2019

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVI

SPIE Conference Volume | 16 November 2018

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XV

Showing 5 of 28 publications

Conference Committee Involvement (30)

Nonimaging Optics: Efficient Design for Illumination and Concentration XX

3 August 2025 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Concentration XIX

18 August 2024 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVIII

21 August 2022 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVII

24 August 2020 | Online Only, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVI

11 August 2019 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XV

19 August 2018 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XIV

6 August 2017 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XIII—Commemorating the 50th Anniversary of Nonimaging Optics

28 August 2016 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII

9 August 2015 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XI

17 August 2014 | San Diego, California, United States

Advanced Display Technology and Application

13 May 2014 | Beijing, China

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X

25 August 2013 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration IX

12 August 2012 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VIII

21 August 2011 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII

1 August 2010 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI

2 August 2009 | San Diego, California, United States

Nonimaging Optics and Efficient Illumination Systems V

11 August 2008 | San Diego, California, United States

Nonimaging Optics and Efficient Illumination Systems IV

26 August 2007 | San Diego, California, United States

High and Low Concentration for Solar Electric Applications

14 August 2006 | San Diego, California, United States

Nonimaging Optics and Efficient Illumination Systems III

13 August 2006 | San Diego, California, United States

Nonimaging Optics and Efficient Illumination Systems II

31 July 2005 | San Diego, California, United States

Nonimaging Optics and Efficient Illumination Systems

2 August 2004 | Denver, Colorado, United States

Nonimaging Optics: Maximum Efficiency Light Transfer VII

3 August 2003 | San Diego, California, United States

Nonimaging Optics: Maximum Efficiency Light Transfer VI

2 August 2001 | San Diego, CA, United States

Nonimaging Optics: Maximum Efficiency Light Transfer V

21 July 1999 | Denver, CO, United States

Nonimaging Optics: Maximum Efficiency Light Transfer IV

27 July 1997 | San Diego, CA, United States

Nonimaging Optics: Maximum Efficiency Light Transfer III

10 July 1995 | San Diego, CA, United States

Nonimaging Optics: Maximum-Efficiency Light Transfer II

12 July 1993 | San Diego, CA, United States

Nonimaging Optics: Maximum Efficiency Light Transfer

23 July 1991 | San Diego, CA, United States

Optics Applied to Solar Energy Conversion

22 August 1977 | San Diego, United States

Showing 5 of 30 Conference Committees

Course Instructor

SC388: Non-Imaging Optics

Nonimaging optics departs from the methods of traditional optical design by instead developing techniques for maximizing the collecting power of illumination elements and systems. Nonimaging designs exceed the concentration attainable with focusing techniques by factors of four or more and approach the theoretical limit (ideal concentrators). This course develops the conceptual foundations and is an excellent companion to Dr. David Jenkins' course which emphasizes applications.

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