Dr. William J. Cassarly Profile

Dr. William J. Cassarly

Synopsys Scientist

SPIE Involvement:

Conference Program Committee | Author | Instructor

Publications (54)

Proceedings Article | 1 October 2024 Presentation + Paper

Quantum dot design for display applications

Yitian Ding, William Cassarly

Proceedings Volume 13132, 1313205 (2024) https://doi.org/10.1117/12.3029521

KEYWORDS: Quantum dot emission, Design, Quantum dots, Light scattering, Quantum dot light emitters, Ray tracing, Materials properties, Optical simulations, Displays

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Proceedings Article | 1 October 2024 Presentation + Paper

Mixing rod with embedded mirrors

William Cassarly, Håkon J. Johnsen

Proceedings Volume 13132, 1313203 (2024) https://doi.org/10.1117/12.3037866

KEYWORDS: Mirrors, Light emitting diodes, Mirror surfaces, Prisms, Superposition, Reflection, Light sources and illumination, Reflectivity, Design, Nonimaging optics

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Proceedings Article | 17 June 2024 Presentation + Paper

Turn-mixer with spatial and angular uniformity

William Cassarly

Proceedings Volume 13022, 130220G (2024) https://doi.org/10.1117/12.3016542

KEYWORDS: Prisms, Mirrors, Light emitting diodes, Reflectivity, Light sources and illumination, Compound parabolic concentrators, Diffusers, Design, Superposition, Rods

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Proceedings Article | 12 March 2024 Paper

Sequence ray trace for efficient and robust stray light analysis

Yong Fang, William Cassarly

Proceedings Volume 12913, 129130X (2024) https://doi.org/10.1117/12.3000087

KEYWORDS: Ray tracing, Stray light, Reflection, Monte Carlo methods, Mirrors, Image segmentation, Stray light analysis, Optical surfaces, Sensors, Optical properties

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Proceedings Article | 12 March 2024 Presentation + Paper

Simulation-based computation of the glare spread function in camera systems

T. L. Davenport, W. Cassarly, B. Crowther

Proceedings Volume 12913, 1291314 (2024) https://doi.org/10.1117/12.3002837

KEYWORDS: Stray light, Lamps, Cameras, Reflection, Imaging systems, Sensors, Design, RGB color model, Optical surfaces, Device simulation

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Proceedings Article | 14 September 2023 Paper

Recent advances in tolerancing illumination optics

William Cassarly, Wooyoun Kim, Jannick Rolland

Proceedings Volume 12798, 127980D (2023) https://doi.org/10.1117/12.2691615

KEYWORDS: Light sources and illumination, Tolerancing, Optical surfaces, Mirror surfaces, Design and modelling, Nonimaging optics, Reflectors, Reflection, Optical alignment, Mirrors

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Proceedings Article | 14 September 2023 Paper

Illumination design problem: the unicorn’s horn

William Cassarly, Julius Muschaweck, Henning Rehn, John Koshel, Lien Smeesters

Proceedings Volume 12798, 127980J (2023) https://doi.org/10.1117/12.3005730

KEYWORDS: Design and modelling, Light sources and illumination, Waveguides, Solids, Prisms, Hollow waveguides, Optical design, Total internal reflection, Refraction, Reflection

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Proceedings Article | 19 November 2021 Paper

IODC 2021 illumination design problem: the curse of Prince Lambert

William Cassarly, Julius Muschaweck, Henning Rehn, John Koshel

Proceedings Volume 12078, 120781Z (2021) https://doi.org/10.1117/12.2605496

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Proceedings Article | 19 November 2021 Paper

Tunable LED-based illuminator using freeform arrays

Shohreh Shadalou, William Cassarly, Thomas Suleski

Proceedings Volume 12078, 120780I (2021) https://doi.org/10.1117/12.2603627

KEYWORDS: Commercial off the shelf technology, Light emitting diodes, Fiber optic illuminators, Reverse modeling, Lenses, Floods, Distortion, Optical design, Optical components, Manufacturing

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Proceedings Article | 19 November 2021 Paper

Compound surface descriptions in illumination design

William Cassarly, Yong Fang

Proceedings Volume 12078, 1207812 (2021) https://doi.org/10.1117/12.2603647

KEYWORDS: Optimization (mathematics), Tolerancing, Reflectors, Nonimaging optics, Imaging systems, Freeform optics, Switches, Scattering, Optical design, Metrology

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Proceedings Article | 13 September 2021 Paper

Modeling interference using Monte Carlo ray trace

William Cassarly, Alexander Lin

Proceedings Volume 11874, 118740A (2021) https://doi.org/10.1117/12.2596775

KEYWORDS: Monte Carlo methods, Ray tracing, Interferometers, Polarization, Reflectivity, Phase shifts, Beam splitters, Diffraction, Systems modeling, Sensors

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Monte Carlo ray tracing has been shown to be both a robust and reliable method for optical modeling of illumination systems. The typical approach traces rays through an optical system and averages the rays in spatial and angular bins to provide estimates of the illuminance and intensity. While Monte Carlo methods are commonly used with incoherent sources, they can also be used with coherent sources. The primary difference between the two simulation types is the inclusion of the phase difference between binned rays in the illuminance and intensity calculations. The phase information can be stored in a ray’s optical path length, which is updated as a ray is traced through a system and when a ray encounters specific interfaces, such as the π phase shift due to a reflection from a surface of higher index. Thus, when careful consideration is given to the phase changes that occur during a ray trace, it is possible to use Monte Carlo methods to model illumination systems that require coherent sources, such as interferometers. Furthermore, with the ability to model coherent sources, beamlet based approaches are also effective. Comparisons are presented. In general, a common challenge for Monte Carlo simulations is the large number of needed rays to overcome statistical noise. However, it is possible to reduce the number of traced rays using various methods, such as: source aiming, scatter aiming, and Backwards Ray Trace. These methods minimize the number of traced rays by using knowledge of the system to selectively avoid tracing rays which will not contribute meaningful data to the output distribution. Monte Carlo ray tracing can also be computationally expensive. To prevent rerunning a costly simulation, it is advantageous to save the traced rays and post process the data for further analysis and studies. For example, the rays can be defocused to a plane at a different distance, re-binned for a difference receiver resolution, or filters can be used to remove rays based on specific criteria like whether they passed through a specific surface. This paper is organized with three main sections. First, we discuss Monte Carlo ray tracing to model interference. The second discusses Monte Carlo ray tracing for modeling diffraction using a Huygens-Fresnel approach. The last summarizes the paper.

Proceedings Article | 12 September 2021 Presentation

Applying Laplacian Magic Mirror in Freeform Illumination Optics Tolerancing

Wooyoun Kim, Jannick Rolland, William Cassarly

Proceedings Volume 11874, 118740P (2021) https://doi.org/10.1117/12.2596898

KEYWORDS: Tolerancing, Mirrors, Freeform optics, Optics manufacturing, Singular optics, Reflectors, Ray tracing

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Proceedings Article | 18 September 2018 Presentation

Fast tolerance analysis of optical systems for illumination (Conference Presentation)

Leonard Zugby, Vaibhav Bora, William Cassarly, Thomas Kuper

Proceedings Volume 10747, 107470E (2018) https://doi.org/10.1117/12.2321896

KEYWORDS: Tolerancing, Optics manufacturing, Monte Carlo methods, Optical simulations, Diamond turning, Assembly tolerances, Aspheric lenses, Optical alignment, Optical components, Surface roughness

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Proceedings Article | 27 November 2017 Paper

Using pinhole images to understand nonimaging optics

William Cassarly

Proceedings Volume 10590, 105901K (2017) https://doi.org/10.1117/12.2293233

KEYWORDS: Illumination engineering, Illumination software, Nonimaging optics, Cameras, Optical design, Freeform optics

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Proceedings Article | 27 November 2017 Paper

IODC 2017 illumination design problem: the centennial illuminator

William Cassarly, Henning Rehn, Alois Herkommer

Proceedings Volume 10590, 1059003 (2017) https://doi.org/10.1117/12.2293231

KEYWORDS: Illumination engineering, Computer aided design, Illumination software, Optical design, Optical design software

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Proceedings Article | 27 November 2017 Paper

Parametric model of volumetric scattering

Simon Magarill, William Cassarly, David Jenkins, Yang Yang, Xiaofeng Yu, Guang Liu

Proceedings Volume 10590, 1059023 (2017) https://doi.org/10.1117/12.2286958

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SPIE Journal Paper | 12 January 2016

Accounting for coherent effects in the ray-tracing of light-emitting diodes with interface gratings via mixed-level simulation

Mayank Bahl, Evan Heller, William Cassarly, Robert Scarmozzino

OE, Vol. 55, Issue 01, 015102, (January 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.1.015102

KEYWORDS: Light emitting diodes, Reflectors, Monte Carlo methods, Finite-difference time-domain method, Collimation, Solids, Interfaces, Computer simulations, Optical engineering, Scattering

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Proceedings Article | 25 August 2015 Paper

Illumination system design with multi-step optimization

Simon Magarill, William Cassarly

Proceedings Volume 9572, 95720H (2015) https://doi.org/10.1117/12.2187008

KEYWORDS: Waveguides, Receivers, Optimization (mathematics), Light, Glasses, Fluctuations and noise, Spherical lenses, Fiber optic illuminators, Solids, Ions

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SPIE Journal Paper | 21 April 2015

Mixed-level optical simulations of light-emitting diodes based on a combination of rigorous electromagnetic solvers and Monte Carlo ray-tracing methods

Mayank Bahl, Guirong Zhou, Evan Heller, William Cassarly, Mingming Jiang, Robert Scarmozzino, G. Groot Gregory, Daniel Herrmann

OE, Vol. 54, Issue 04, 045105, (April 2015) https://doi.org/10.1117/12.10.1117/1.OE.54.4.045105

KEYWORDS: Light emitting diodes, Monte Carlo methods, Glasses, Finite-difference time-domain method, Interfaces, Polarization, Organic light emitting diodes, Eye, Scattering, Optical simulations

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Proceedings Article | 10 March 2015 Paper

Modeling scattering in turbid media using the Gegenbauer phase function

Katherine Calabro, William Cassarly

Proceedings Volume 9333, 93330F (2015) https://doi.org/10.1117/12.2079695

KEYWORDS: Scattering, Mie scattering, Tissues, Particles, Light scattering, Monte Carlo methods, Tissue optics, Anisotropy, Refractive index, Fractal analysis

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Proceedings Article | 17 December 2014 Paper

IODC 2014 Illumination design problem: the Cinderella Lamp

William Cassarly

Proceedings Volume 9293, 929304 (2014) https://doi.org/10.1117/12.2075913

KEYWORDS: Light emitting diodes, Surface finishing, Glasses, Polishing, Optical design, Lamps, Mirrors, Fiber optic illuminators, Lens design, Absorption

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Proceedings Article | 18 September 2014 Paper

Optical simulations of organic light-emitting diodes through a combination of rigorous electromagnetic solvers and Monte Carlo ray-tracing methods

Mayank Bahl, Gui-Rong Zhou, Evan Heller, William Cassarly, Mingming Jiang, Rob Scarmozzino, G. Groot Gregory

Proceedings Volume 9190, 919009 (2014) https://doi.org/10.1117/12.2061089

KEYWORDS: Monte Carlo methods, Organic light emitting diodes, Finite-difference time-domain method, Interfaces, Glasses, Eye, Geometrical optics, Scattering, Electromagnetism, Computer simulations

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SPIE Journal Paper | 21 November 2013 Open Access

Supporting conic design methods and conic intersection properties

Cristina Canavesi, William Cassarly, Jannick Rolland

OE, Vol. 53, Issue 03, 031306, (November 2013) https://doi.org/10.1117/12.10.1117/1.OE.53.3.031306

KEYWORDS: Reflectors, Ray tracing, Monte Carlo methods, Computer programming, Detection and tracking algorithms, Reflector design, Optical engineering, Light, Inverse optics, Inverse problems

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Proceedings Article | 18 September 2013 Paper

Supporting conic design methods and conic intersection properties

Cristina Canavesi, William Cassarly, Jannick Rolland

Proceedings Volume 8834, 88340L (2013) https://doi.org/10.1117/12.2025043

KEYWORDS: Ray tracing, Reflectors, Monte Carlo methods, Detection and tracking algorithms, Computer programming, Light, Inverse problems, Reflector design, Nonimaging optics, Silicon

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Proceedings Article | 11 October 2012 Paper

Implementation of the linear programming algorithm for freeform reflector design

Cristina Canavesi, William Cassarly, Jannick Rolland

Proceedings Volume 8485, 84850E (2012) https://doi.org/10.1117/12.928041

KEYWORDS: Computer programming, Reflectors, Detection and tracking algorithms, Reflector design, Silicon, Ray tracing, Optical design, Nonimaging optics, Chemical elements, 3D acquisition

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Proceedings Article | 21 September 2011 Paper

Using the on-axis BSDF at a dielectric surface to model the BSDF at off-axis angles

William Cassarly

Proceedings Volume 8170, 81700L (2011) https://doi.org/10.1117/12.897290

KEYWORDS: Bidirectional reflectance transmission function, Diffusers, Transmittance, Reflectivity, Ray tracing, Statistical analysis, Dielectrics, 3D modeling, Diffraction gratings, Monte Carlo methods

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Proceedings Article | 8 September 2011 Paper

Illumination devices for uniform delivery of light to the oral cavity for photodynamic therapy

Cristina Canavesi, William Cassarly, Thomas Foster, Jannick Rolland

Proceedings Volume 8124, 812402 (2011) https://doi.org/10.1117/12.892400

KEYWORDS: Reflectors, Photodynamic therapy, Prototyping, Optics manufacturing, Cancer, Oncology, Reflectivity, Tissues, Ray tracing, Error analysis

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Proceedings Article | 9 September 2010 Paper

Iterative reflector design using a cumulative flux compensation approach

William Cassarly

Proceedings Volume 7652, 76522L (2010) https://doi.org/10.1117/12.871698

KEYWORDS: Computer simulations, Reflectors, Monte Carlo methods, Detection and tracking algorithms, Reflector design, Light emitting diodes, Ray tracing, Optimization (mathematics), Virtual reality, Prototyping

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Proceedings Article | 9 September 2010 Paper

Freeform reflector design using integrable maps

Florian Fournier, William Cassarly, Jannick Rolland

Proceedings Volume 7652, 765221 (2010) https://doi.org/10.1117/12.871014

KEYWORDS: Reflectors, Reflector design, Manufacturing, Spherical lenses, Light sources, Freeform optics, Light sources and illumination, Light, Detection and tracking algorithms, Photonics

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Proceedings Article | 21 August 2009 Paper

Designing freeform reflectors for extended sources

Florian Fournier, William Cassarly, Jannick Rolland

Proceedings Volume 7423, 742302 (2009) https://doi.org/10.1117/12.826021

KEYWORDS: Reflectors, Detection and tracking algorithms, Scattering, Reflector design, Solids, Fourier transforms, Light, Light scattering, Algorithm development, Computer aided design

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Proceedings Article | 24 September 2008 Paper

Optimization of single reflectors for extended sources

Florian Fournier, William Cassarly, Jannick Rolland

Proceedings Volume 7103, 71030I (2008) https://doi.org/10.1117/12.800377

KEYWORDS: Reflectors, Optimization (mathematics), Detection and tracking algorithms, Reflector design, Light, Monte Carlo methods, Ray tracing, Near field, Reflectivity, Headlamps

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Proceedings Article | 23 September 2008 Paper

Recent advances in mixing rods

William Cassarly

Proceedings Volume 7103, 710307 (2008) https://doi.org/10.1117/12.797748

KEYWORDS: Light emitting diodes, Diffusers, RGB color model, Astatine, Monte Carlo methods, Spatial light modulators, Mirrors, Solids, Eye, Computer simulations

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Proceedings Article | 28 November 2007 Paper

Backlight pattern optimization

William Cassarly

Proceedings Volume 6834, 683407 (2007) https://doi.org/10.1117/12.774789

KEYWORDS: Waveguides, Light emitting diodes, Optimization (mathematics), Diffusers, Monte Carlo methods, Control systems, Reflectivity, LCDs, LED backlight, Prototyping

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Proceedings Article | 18 September 2007 Paper

Illumination merit functions

William Cassarly

Proceedings Volume 6670, 66700K (2007) https://doi.org/10.1117/12.737955

KEYWORDS: Reflectors, Optimization (mathematics), Collimation, Receivers, Light emitting diodes, Monte Carlo methods, Ray tracing, Fluctuations and noise, Collimators, Systems modeling

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Proceedings Article | 18 July 2006 Paper

Non-rotationally symmetric mixing rods

William Cassarly, Tom L. R. Davenport

Proceedings Volume 6342, 63420Q (2006) https://doi.org/10.1117/12.692256

KEYWORDS: Light emitting diodes, Reflectors, RGB color model, Dielectrics, Solids, Reflection, Mirrors, Optical design, Projection systems, Ray tracing

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Proceedings Article | 18 July 2006 Paper

Optimizing density patterns to achieve desired light extraction for displays

T. L. R. Davenport, W. Cassarly

Proceedings Volume 6342, 63420T (2006) https://doi.org/10.1117/12.692259

KEYWORDS: Waveguides, Light emitting diodes, Control systems, Raster graphics, Reflectors, Light, Prototyping, Photography, Diffusers, Detection and tracking algorithms

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Proceedings Article | 20 August 2005 Paper

Optimizing angle-to-area-converting, light-piping systems using surface features

Thomas Davenport, William Cassarly, Thomas Hough

Proceedings Volume 5942, 594204 (2005) https://doi.org/10.1117/12.623007

KEYWORDS: Energy efficiency, Dielectrics, Superposition, Refractive index, Systems modeling, Autoregressive models, Polymethylmethacrylate, Energy transfer, Receivers, Light

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Proceedings Article | 10 February 2005 Paper

Noise tolerant illumination optimization applied to display devices

William Cassarly, Bruce Irving

Proceedings Volume 5638, (2005) https://doi.org/10.1117/12.580179

KEYWORDS: Optimization (mathematics), Prisms, Light emitting diodes, Monte Carlo methods, Prototyping, Waveguides, LED displays, Lamps, Reflectors, 3D displays

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Proceedings Article | 22 October 2004 Paper

Optimization for efficient angle-to-area conversion in illumination systems

Thomas Davenport, Thomas Hough, William Cassarly

Proceedings Volume 5524, (2004) https://doi.org/10.1117/12.560158

KEYWORDS: Energy transfer, Neodymium, Compound parabolic concentrators, Energy efficiency, Dielectrics, Refractive index, Detection and tracking algorithms, Refraction, Reflectivity, Reflection

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Proceedings Article | 1 September 2004 Paper

Optimization for illumination systems: the next level of design

Thomas Davenport, Thomas Hough, William Cassarly

Proceedings Volume 5456, (2004) https://doi.org/10.1117/12.548683

KEYWORDS: Optimization (mathematics), Compound parabolic concentrators, Monte Carlo methods, Ray tracing, Reflectors, Solar concentrators, Aspheric lenses, Computing systems, Reflectivity, Raster graphics

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Proceedings Article | 8 January 2004 Paper

Taming light using nonimaging optics

William Cassarly

Proceedings Volume 5185, (2004) https://doi.org/10.1117/12.508709

KEYWORDS: Nonimaging optics, Solids, Optical design, Imaging systems, Lithographic illumination, Lithography, Fiber optic illuminators, Solar concentrators, Fiber optics, Displays

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Proceedings Article | 12 November 2003 Paper

The art of making efficient illuminator design fun

William Cassarly

Proceedings Volume 5186, (2003) https://doi.org/10.1117/12.508701

KEYWORDS: Prototyping, Ray tracing, Light emitting diodes, Light sources, Human-machine interfaces, Fiber optic illuminators, Computing systems, Computer simulations, Monte Carlo methods, Lamps

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Proceedings Article | 23 December 2002 Paper

Illumination optimization: The revolution has begun

William Cassarly, Michael Hayford

Proceedings Volume 4832, (2002) https://doi.org/10.1117/12.486466

KEYWORDS: Monte Carlo methods, Ray tracing, Optimization (mathematics), Computing systems, Imaging systems, Reflectors, Detection and tracking algorithms, Systems modeling, Algorithm development, Illumination software

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Proceedings Article | 4 September 2002 Paper

Error estimation and smoothing of 2D illumination and chromaticity distributions

William Cassarly, Eric Fest, David Jenkins

Proceedings Volume 4769, (2002) https://doi.org/10.1117/12.481178

KEYWORDS: Error analysis, Ray tracing, Monte Carlo methods, Nonlinear filtering, Roads, Image segmentation, RGB color model, Copper, Silver, Gold

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Proceedings Article | 16 August 2002 Paper

Accurate illumination system predictions using measured spatial luminance distributions

William Cassarly, David Jenkins, Holger Moench

Proceedings Volume 4775, (2002) https://doi.org/10.1117/12.479655

KEYWORDS: Reflectors, Lamps, Cameras, Monte Carlo methods, Integrating spheres, Imaging systems, Light sources, Glasses, Optical components, Geometrical optics

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SPIE Journal Paper | 1 May 2001

Analysis of single lens arrays using convolution

Andrew Riser, William Cassarly

OE, Vol. 40, Issue 05, (May 2001) https://doi.org/10.1117/12.10.1117/1.1355249

KEYWORDS: Convolution, Reflectors, Monte Carlo methods, Lamps, Superposition, Optical engineering, Wavefronts, Ray tracing, Collimation, Spherical lenses

SPIE Journal Paper | 1 July 2000

Automated design of a uniform distribution using faceted reflectors

William Cassarly, Stuart David, David Jenkins, Andrew Riser, Thomas Davenport

OE, Vol. 39, Issue 07, (July 2000) https://doi.org/10.1117/12.10.1117/1.602565

KEYWORDS: Reflectors, Reflector design, Image segmentation, Detection and tracking algorithms, Monte Carlo methods, Superposition, Convolution, Solids, Optical engineering, Light sources and illumination

Proceedings Article | 21 September 1998 Paper

Faceted reflector design for uniform illumination

Stuart David, Thomas Walker, William Cassarly

Proceedings Volume 3482, (1998) https://doi.org/10.1117/12.322047

KEYWORDS: Reflectors, Lamps, Reflector design, Superposition, Receivers, Monte Carlo methods, Monochromatic aberrations, Systems modeling, Glasses, Performance modeling

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Proceedings Article | 1 June 1994 Paper

Phase locking of a two-dimensional semiconductor laser array in an external Talbot cavity

Steve Sanders, Robert Waarts, Derek Nam, David Welch, John Ehlert, William Cassarly, J. Michael Finlan, Kevin Flood

Proceedings Volume 2148, (1994) https://doi.org/10.1117/12.176647

KEYWORDS: Imaging systems, Phased arrays, Diffraction, Semiconductor lasers, Liquid crystals, Mirrors, Mode locking, Phase contrast, Phase measurement, Control systems

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Proceedings Article | 16 June 1993 Paper

Phased 2D semiconductor laser array for high coherent output power

Robert Waarts, Derek Nam, David Welch, Donald Scifres, John Ehlert, William Cassarly, J. Michael Finlan, Kevin Flood

Proceedings Volume 1850, (1993) https://doi.org/10.1117/12.146914

KEYWORDS: Semiconductor lasers, Diffraction, Control systems, Sensing systems, Liquid crystals, Mirrors, Continuous wave operation, Phased arrays, Waveguides, Laser damage threshold

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Proceedings Article | 26 June 1992 Paper

Semiconductor laser array in an external Talbot cavity

Robert Waarts, Derek Nam, David Welch, David Mehuys, William Cassarly, John Ehlert, J. Michael Finlan, Kevin Flood

Proceedings Volume 1634, (1992) https://doi.org/10.1117/12.59148

KEYWORDS: Semiconductor lasers, Waveguides, Diffraction, Mirrors, Sensing systems, Control systems, Continuous wave operation, Laser applications, Technologies and applications, Liquid crystals

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Proceedings Article | 26 June 1992 Paper

Automated two-dimensional phase sensing and control using phase-contrast imaging

William Cassarly, John Ehlert, Steve Chakmakjian, Dennis Harnesberger, J. Michael Finlan, Kevin Flood, Robert Waarts, Derek Nam, David Welch

Proceedings Volume 1634, (1992) https://doi.org/10.1117/12.59149

KEYWORDS: Wavefronts, Semiconductor lasers, Phase measurement, Sensing systems, Control systems, Near field, Fourier transforms, Phase shift keying, Liquid crystals, Technologies and applications

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Proceedings Article | 1 June 1991 Paper

Low-insertion-loss, high-precision liquid crystal optical phased array

William Cassarly, John Ehlert, D. Henry

Proceedings Volume 1417, (1991) https://doi.org/10.1117/12.43746

KEYWORDS: Wavefronts, Liquid crystals, Etching, Diffraction, Phase shift keying, Phase shifts, Electrodes, Free space optical communications, Laser applications, Telescopes

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Proceedings Article | 1 May 1990 Paper

Continuous wide-angle beam steering using translation of binary microlens arrays and a liquid-crystal phased array

Kevin Flood, William Cassarly, Christina Sigg, J. Michael Finlan

Proceedings Volume 1211, (1990) https://doi.org/10.1117/12.17959

KEYWORDS: Microlens array, Microlens, Phased array optics, Beam steering, Liquid crystals, Binary data, Phased arrays, Space telescopes, Telescopes, Holography

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Showing 5 of 54 publications

Conference Committee Involvement (51)

Optical Modeling and Performance Predictions XV

3 August 2025 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Concentration XX

3 August 2025 | San Diego, California, United States

Optical Modeling and Performance Predictions XIV

19 August 2024 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Concentration XIX

18 August 2024 | San Diego, California, United States

Illumination Optics VII

8 April 2024 | Strasbourg, France

Optical Modeling and Performance Predictions XIII

21 August 2023 | San Diego, California, United States

Optical Modeling and Performance Predictions XII

22 August 2022 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVIII

21 August 2022 | San Diego, California, United States

Illumination Optics VI

13 September 2021 | Online Only, Spain

International Optical Design Conference 2021

27 June 2021 | Online Only, United States

Optical Design and Testing X

12 October 2020 | Online Only, China

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVII

24 August 2020 | Online Only, California, United States

Optical Modeling and Performance Predictions XI

24 August 2020 | Online Only, California, United States

Optical Modeling and System Alignment

12 August 2019 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVI

11 August 2019 | San Diego, California, United States

Optical Modeling and Performance Predictions X

22 August 2018 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XV

19 August 2018 | San Diego, California, United States

Illumination Optics V

14 May 2018 | Frankfurt, Germany

Optical Modeling and Performance Predictions IX

8 August 2017 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XIV

6 August 2017 | San Diego, California, United States

Optical Modeling and Performance Predictions VIII

1 September 2016 | 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

Illumination Optics IV

7 September 2015 | Jena, Germany

Optical Modeling and Performance Predictions VII

11 August 2015 | San Diego, California, United States

An Optical Believe It or Not: Key Lessons Learned IV

10 August 2015 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XII

9 August 2015 | San Diego, California, United States

An Optical Believe It or Not: Key Lessons Learned III

18 August 2014 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XI

17 August 2014 | San Diego, California, United States

Optical Modeling and Performance Predictions VI

29 August 2013 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration X

25 August 2013 | San Diego, California, United States

Illumination Optics III

26 November 2012 | Barcelona, Spain

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration IX

12 August 2012 | San Diego, California, United States

Illumination Optics II

7 September 2011 | Marseille, France

Optical Modeling and Performance Predictions V

25 August 2011 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VIII

21 August 2011 | San Diego, California, United States

An Optical Believe It or Not: Key Lessons Learned II

2 August 2010 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VII

1 August 2010 | San Diego, California, United States

Optical Modeling and Performance Predictions IV

6 August 2009 | San Diego, California, United States

Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI

2 August 2009 | San Diego, California, United States

Illumination Optics

2 September 2008 | Glasgow, Scotland, United Kingdom

Nonimaging Optics and Efficient Illumination Systems V

11 August 2008 | San Diego, California, United States

Optical Modeling and Performance Predictions III

29 August 2007 | San Diego, California, United States

Seventh International Conference on Solid State Lighting

27 August 2007 | San Diego, California, United States

Nonimaging Optics and Efficient Illumination Systems IV

26 August 2007 | San Diego, California, United States

Sixth International Conference on Solid State Lighting

14 August 2006 | San Diego, California, United States

Nonimaging Optics and Efficient Illumination Systems III

13 August 2006 | San Diego, California, United States

Fifth International Conference on Solid State Lighting

1 August 2005 | San Diego, California, United States

Nonimaging Optics and Efficient Illumination Systems II

31 July 2005 | San Diego, California, United States

Fourth International Conference on Solid State Lighting

3 August 2004 | Denver, Colorado, United States

Nonimaging Optics and Efficient Illumination Systems

2 August 2004 | Denver, Colorado, United States

Third International Conference on Solid State Lighting

5 August 2003 | San Diego, California, United States

Showing 5 of 51 Conference Committees

Course Instructor

SC011: Design of Efficient Illumination Systems

Illumination systems are included in fiber illuminators, projectors, and lithography systems. The design of an illumination system requires balancing uniformity, maximizing the collection efficiency from the source, and minimizing the size of the optical package. These choices are examined for systems using lightpipes, lens arrays, faceted optics, tailored edge rays designs, and integrating spheres through a combination of computer simulations, hardware demonstrations and discussions.

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SC345: Light Source Modeling

The increasing power of illumination software has accentuated the demand for creating accurate source models. This course is an overview of source modeling techniques ranging from apodization of point sources to construction of sources using extended emitters to apodization using multiple CCD camera images. Emphasis is placed on incoherent sources including incandescent, halogen, fluorescent, high intensity discharge, and light emitting diodes. The use of optimization to fine tune source models is shown.

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