Mr. Alan W. Greynolds Profile

Alan W. Greynolds

RETIRED

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BS in Engineering Physics from Cornell University. MS in Optical Sciences from the University of Arizona. Original creator and primary kernel developer of the award-winning ASAP optical analysis software. 2011 recipient of SPIE's A.E. Conrady award.

Publications (19)

Proceedings Article | 19 November 2021 Presentation + Paper

Hyper-aspheroidal surfaces: two approaches

Alan Greynolds

Proceedings Volume 12078, 1207806 (2021) https://doi.org/10.1117/12.2603614

KEYWORDS: Computer aided design, Aspheric lenses, Reflectivity, Optical spheres, Optical design, Lens design, Antireflective coatings

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Proceedings Article | 21 August 2020 Presentation + Paper

Ten years after (no, not the band): advancements in optical engineering computations over the decade(s)

Alan Greynolds

Proceedings Volume 11483, 114830C (2020) https://doi.org/10.1117/12.2564723

KEYWORDS: Optical engineering, Finite-difference time-domain method, 3D modeling, Ray tracing, Lens design, Computer simulations

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Proceedings Article | 21 August 2020 Presentation + Paper

Some surprising results from the analytical design of high-NA aplanatic singlet lenses with only one aspheric surface

Alan Greynolds

Proceedings Volume 11479, 114790E (2020) https://doi.org/10.1117/12.2569847

KEYWORDS: Monochromatic aberrations, Aspheric lenses, Lenses, Refractive index, Germanium, Distortion

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Proceedings Article | 11 September 2019 Presentation + Paper

Comparison of 3D finite-difference methods for modeling waveguide components embedded in a general optical system

Alan Greynolds

Proceedings Volume 11103, 111030L (2019) https://doi.org/10.1117/12.2526531

KEYWORDS: 3D modeling, Waveguides, Finite difference methods, Waveguide modes, Beam propagation method, Finite-difference time-domain method, Wave propagation, Instrument modeling, Ray tracing, Numerical analysis

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Proceedings Article | 17 September 2018 Presentation + Paper

Simple but accurate variance reduction techniques for Monte Carlo ray tracing of stray light from optical surface scatter

Alan Greynolds

Proceedings Volume 10743, 1074302 (2018) https://doi.org/10.1117/12.2318552

KEYWORDS: Monte Carlo methods, Ray tracing, Stray light, Geometrical optics, Scattering

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Proceedings Article | 27 November 2017 Paper

Ray-pathing: a generalized extension and possible alternative to conventional ray aiming

Alan Greynolds

Proceedings Volume 10590, 1059013 (2017) https://doi.org/10.1117/12.2284927

KEYWORDS: Optical design, Stray light, Space telescopes, Telescopes, Astronomical imaging, Aberration theory

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Proceedings Article | 26 September 2016 Paper

Derivation of realistic surface and particulate scatter transfer functions and their application to incoherent imaging of high-contrast fine-detail scenes

Alan Greynolds

Proceedings Volume 9961, 996105 (2016) https://doi.org/10.1117/12.2239069

KEYWORDS: Surface finishing, Imaging systems, Polishing, Fourier transforms, Diffraction, Fractal analysis, Optical transfer functions, Spatial frequencies, Scattering, Particles

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Proceedings Article | 23 September 2015 Paper

General physically-realistic BRDF models for computing stray light from arbitrary isotropic surfaces

Alan Greynolds

Proceedings Volume 9577, 95770A (2015) https://doi.org/10.1117/12.2185080

KEYWORDS: Bidirectional reflectance transmission function, Data modeling, Stray light, Statistical modeling, Aluminum, Surface finishing, Computer simulations, Polishing, 3D modeling, Inverse optics

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Proceedings Article | 3 September 2015 Paper

Fast robust non-sequential optical ray-tracing with implicit algebraic surfaces

Alan Greynolds

Proceedings Volume 9578, 957804 (2015) https://doi.org/10.1117/12.2185078

KEYWORDS: Ray tracing, Geometrical optics, Computer aided design, Systems modeling, CAD systems, Zemax, Imaging systems, Reflection, Optical analysis, Glasses

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Proceedings Article | 17 December 2014 Paper

Fat rays revisited: a synthesis of physical and geometrical optics with Gaußlets

Alan Greynolds

Proceedings Volume 9293, 92931U (2014) https://doi.org/10.1117/12.2073087

KEYWORDS: Wave propagation, Ray tracing, Geometrical optics, Gaussian beams, Diffraction, Beam propagation method, Compound parabolic concentrators, Fourier transforms, Wavefronts, Superposition

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Proceedings Article | 27 September 2013 Paper

Efficient automatic computation of veiling glare from scatter and ghosts by a simple modification to Monte Carlo ray tracing

Alan Greynolds

Proceedings Volume 8840, 884007 (2013) https://doi.org/10.1117/12.2019942

KEYWORDS: Ray tracing, Stray light, Mirrors, Monte Carlo methods, Scattering, Surface finishing, Polishing, Light scattering, Error analysis, Reflection

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Proceedings Article | 25 September 2013 Paper

Multi-core and GPU accelerated simulation of a radial star target imaged with equivalent t-number circular and Gaussian pupils

Alan Greynolds

Proceedings Volume 8841, 88410F (2013) https://doi.org/10.1117/12.2021036

KEYWORDS: Stars, Optical transfer functions, Image acquisition, Optical engineering, Fourier transforms, Computer simulations, Clocks, Ray tracing, Spatial frequencies, Information operations

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Proceedings Article | 10 September 2011 Paper

Scalability of a cross-platform multi-threaded non-sequential optical ray tracer

Alan Greynolds

Proceedings Volume 8129, 81290C (2011) https://doi.org/10.1117/12.891920

KEYWORDS: Geometrical optics, Ray tracing, Zemax, Optical design, Current controlled current source, Optical engineering, Visualization

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Proceedings Article | 1 October 2009 Paper

Free-space propagation of extreme NA polarized beams using the vector plane wave spectrum method and multi-gigabyte FFTs

Alan Greynolds

Proceedings Volume 7427, 742702 (2009) https://doi.org/10.1117/12.825489

KEYWORDS: Wave propagation, Fourier transforms, Polarization, Near field, Laser beam propagation, Maxwell's equations, Beam propagation method, Magnetism, Free space optics, Partial differential equations

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Proceedings Article | 22 August 2009 Paper

Design, analysis, and fabrication of a really bad lens

Alan Greynolds

Proceedings Volume 7429, 74290E (2009) https://doi.org/10.1117/12.825480

KEYWORDS: Lens design, Aspheric lenses, Monochromatic aberrations, Aberration theory, Surface finishing, Manufacturing, Aberration correction, Spherical lenses, Computer aided design, Near field

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Proceedings Article | 25 October 2007 Paper

Stray light computations: Has nothing changed since the 1970s?

Alan Greynolds

Proceedings Volume 6675, 66750B (2007) https://doi.org/10.1117/12.730258

KEYWORDS: Stray light, Ray tracing, Computer aided design, Diffraction, Sensors, Stray light analysis, Scattering, Optical coatings, Solid modeling, Telescopes

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Proceedings Article | 23 December 2002 Paper

Superconic and subconic surface descriptions in optical design

Alan Greynolds

Proceedings Volume 4832, (2002) https://doi.org/10.1117/12.486491

KEYWORDS: Optical design, Aspheric lenses, Monochromatic aberrations, Optical spheres, Telescopes, Natural surfaces, Geometrical optics, Imaging systems, Chromium, Differential equations

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Proceedings Article | 15 April 1993 Paper

Combination of global-optimization and expert-systems techniques in optical design

Steve Johnston, Alan Greynolds, David Wang, Donald Dilworth

Proceedings Volume 1780, 17800A (1993) https://doi.org/10.1117/12.142877

KEYWORDS: Databases, Optical design, Optimization (mathematics), Optical components

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Proceedings Article | 1 January 1991 Paper

Separation of function in the ASAP software package

Steve Johnston, Alan Greynolds

Proceedings Volume 1354, (1991) https://doi.org/10.1117/12.47962

KEYWORDS: Ray tracing, Optimization (mathematics), Geometrical optics, Lens design, Point spread functions, Interfaces, Optical design, Image analysis, Human-machine interfaces, Polarization

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Showing 5 of 19 publications

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