Dr. Nicholas Takaki Profile

Dr. Nicholas Takaki

Sr. R&D Engineer I

SPIE Involvement:

Editorial Board Member: Optical Engineering | Author

Area of Expertise:

Lens Design , Freeform Optics , Aspherics , Orthogonal Polynomials , Optimization

Publications (9)

Proceedings Article | 14 September 2023 Paper

Refractive objective design for femtosecond laser application

Scott Sparrold, Eric Schiesser, Nick Takaki, John Rogers

Proceedings Volume 12798, 127981I (2023) https://doi.org/10.1117/12.2692123

KEYWORDS: Design and modelling, Glasses, Pupil aberrations, Colorimetry, Optical path differences, Chromatic aberrations, Refractive index, Dispersion, Wavefront aberrations, Ultrafast phenomena

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Proceedings Article | 14 September 2023 Paper

The importance of lens mounting details in passive athermalization: a design example

Eric Schiesser, Nick Takaki, Blake Crowther, John Rogers

Proceedings Volume 12798, 127982K (2023) https://doi.org/10.1117/12.2692542

KEYWORDS: Athermalization, Modulation transfer functions, Glasses, Design and modelling, Thermal optics, Staring arrays, Temperature metrology, Thermography, Thermal effects, Switching

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Proceedings Article | 14 September 2023 Paper

Leveraging confocality and Cartesian reflectors in freeform optical designs

Jonathan Papa, Nick Takaki, Eric Schiesser

Proceedings Volume 12798, 1279817 (2023) https://doi.org/10.1117/12.2692112

KEYWORDS: Monochromatic aberrations, Optical alignment, Interferograms, Mirror surfaces, Metrology, Mirrors, Reflectors, Freeform optics, Optical spheres, Conical mirrors

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Proceedings Article | 19 November 2021 Presentation + Paper

Representations of off-axis conics for lens design

Eric Schiesser, Nick Takaki, Bryan Stone

Proceedings Volume 12078, 120781F (2021) https://doi.org/10.1117/12.2603666

KEYWORDS: Optical properties, Lens design, Reflectors, Off axis mirrors, Mirrors, Geometrical optics, Reflectivity, Reflection, Freeform optics

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Proceedings Article | 19 November 2021 Paper

Aberration-based design example for freeform optical designs with base off-axis conics

Aaron Bauer, Jannick Rolland, Nick Takaki

Proceedings Volume 12078, 120781M (2021) https://doi.org/10.1117/12.2603673

KEYWORDS: Monochromatic aberrations, Optical design, Mirrors, Wavefronts, Interferometry, Zernike polynomials

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In this paper, we show, via a design example, how to leverage the parameters of a base off-axis conic to design freeform optical systems using the full-field display driven aberration-based design method discussed in [1]. Off-axis conic sections are often considered when designing unobscured or non-axisymmetric systems, including as base surfaces for freeform optics [2-8]. Likewise, design methods that use nodal aberration theory and full-field displays to gain insight into the aberrations of freeform systems have been demonstrated to be effective at generating starting points and performing designs (e.g., [1, 9-11]). However, in these aberration-based design methods, a central consideration is the correction of coma and astigmatism, which often involves the introduction of orthogonal polynomial astigmatism and coma terms (i.e.,, Z5/Z6 and Z7/Z8 for the Fringe Zernike polynomials). These terms are often major contributors to freeform departures, thus reducing or eliminating the need for orthogonal polynomial astigmatism and coma may improve interferometric testability estimates based on the magnitude of freeform departures. Consequently, in this paper, we leverage the parameters of base off-axis conics to follow the aberration-based design method without the use of additional orthogonal polynomial astigmatism and coma terms. While an off-axis conic is not exactly equivalent to a sphere plus astigmatism and coma, it is shown via a design example that re-designing with base off-axis conic parameters from the start can yield a new design that achieves equivalent optical performance without orthogonal polynomial astigmatism and coma. When these design methods are coupled with design methods aimed at reducing surface departures, significant improvements in interferometric testability estimates can be achieved, including when compared to fitting freeform surfaces designed with base spheres with the best-fit off-axis conic after optimization. For comparison, the design study in this paper is conducted twice: once using base off-axis conics with Fringe Zernike sag departure terms (excluding Zernike astigmatism and coma), and once using base spheres with Fringe Zernike sag departure terms (including Zernike astigmatism and coma).

Proceedings Article | 2 July 2019 Open Access

Light and lilacs: an interactive exploration of colorimetry

Nicholas Kochan, Janet Hrdina, Saniat Ahmed Choudhury, Jennifer D. Kruschwitz, Di Xu, Saleem Iqbal, Benjamin Moon, David Lippman, Matthias Banet, Kaitlin Dunn, Ashan Ariyawansa Galabada Dewage, Robert Draham, Nicholas Takaki

Proceedings Volume 11143, 111431N (2019) https://doi.org/10.1117/12.2524624

KEYWORDS: Cameras, Colorimetry, Light emitting diodes, Photonics, Visualization, Optical components, Thermography, Light sources, Ultraviolet radiation, Control systems

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Proceedings Article | 21 May 2018 Paper

Design of a freeform gradient-index prism for mixed reality head mounted display

Anthony Yee, Wanyue Song, Nick Takaki, Tianyi Yang, Yang Zhao, Yunhui Ni, S. Yvonne Bodell, Julie Bentley, Duncan Moore, Jannick Rolland

Proceedings Volume 10676, 106760S (2018) https://doi.org/10.1117/12.2307733

KEYWORDS: GRIN lenses, Modulation transfer functions, 3D printing, Mixed reality, Gradient-index optics, Augmented reality, Optical design, Freeform optics

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Proceedings Article | 21 May 2018 Paper

Over-designed and under-performing: design and analysis of a freeform prism via careful use of orthogonal surface descriptions

Nicholas Takaki, Wanyue Song, Anthony Yee, Jannick Rolland, Duncan Moore, Julie Bentley

Proceedings Volume 10676, 1067616 (2018) https://doi.org/10.1117/12.2315641

KEYWORDS: Prisms, Monochromatic aberrations, Reflectivity, Modulation transfer functions, Mirrors, Aberration correction, Eye, Wavefronts, Aberration theory, Aspheric lenses

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Proceedings Article | 27 November 2017 Paper

Mathematical properties of describing freeform optical surfaces with orthogonal bases

Jannick Rolland, Nick Takaki

Proceedings Volume 10590, 105900U (2017) https://doi.org/10.1117/12.2292913

KEYWORDS: Freeform optics, Aspheric lenses

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Showing 5 of 9 publications

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