Mr. Jean Paul Freyssinier Profile

Jean Paul Freyssinier

Senior Research Scientist at Rensselaer Polytechnic Institute

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 6 October 2023 Presentation + Paper

Photobleaching of transparent photopolymer resins for use in LED lighting optical elements

Jean Paul Freyssinier, Indika Perera, Nadarajah Narendran, Akila Udage

Proceedings Volume PC12670, PC1267001 (2023) https://doi.org/10.1117/12.2676984

KEYWORDS: Photobleaching, Optical components, LED lighting, Modeling, Light sources and illumination, 3D printing, Transparency, Transmittance, Time metrology, Process modeling

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Proceedings Article | 3 October 2023 Presentation + Paper

3D-printed heat sinks for thermal management of LED lighting

Indika Perera, Nadarajah Narendran, Jean Paul Freyssinier

Proceedings Volume 12670, 1267009 (2023) https://doi.org/10.1117/12.2676953

KEYWORDS: Heatsinks, Light emitting diodes, Thermal effects, LED lighting, Electrical conductivity, Light sources and illumination, Lamps, Simulations, Halogens, Temperature metrology

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Proceedings Article | 2 October 2023 Presentation

3D printing: opportunities and challenges for custom, spec-grade architectural lighting

Alejandro Guerrero, Dustin Kloempken

Proceedings Volume PC12670, (2023) https://doi.org/10.1117/12.2677570

KEYWORDS: Light sources and illumination, 3D printing, Manufacturing, Prototyping, Product engineering, Packaging, Lead, Flexible manufacturing, Engineering, Custom fabrication

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Proceedings Article | 29 September 2023 Presentation + Paper

3D-printed refractive secondary optics for LED lighting

Indika Perera, Jean Paul Freyssinier, Nadarajah Narendran, Akila Udage

Proceedings Volume 12670, 1267003 (2023) https://doi.org/10.1117/12.2679198

KEYWORDS: Lenses, 3D printing, Light emitting diodes, Light sources and illumination, LED lighting, Optical surfaces, Optics manufacturing, Optical components, Beam shaping

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Proceedings Article | 29 September 2023 Presentation + Paper

Long-term performance of 3D-printed optics when exposed to thermal and optical radiation

Indika Perera, Akila Udage, Nadarajah Narendran, Jean Paul Freyssinier

Proceedings Volume 12670, 1267006 (2023) https://doi.org/10.1117/12.2676923

KEYWORDS: Transmittance, Light emitting diodes, LED lighting, 3D printing, Photopolymers, Optical components, Modeling, Optical materials characterization, Additive manufacturing

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Proceedings Article | 29 September 2023 Presentation + Paper

Insulation properties of 3D-printed components for use in interior building panels

Amatullah Kose, Indika Perera, Nadarajah Narendran, Jean Paul Freyssinier, Farjana Mostafa

Proceedings Volume 12670, 1267008 (2023) https://doi.org/10.1117/12.2676863

KEYWORDS: 3D printing, Materials properties, Light sources and illumination, Polymers, Buildings

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Proceedings Article | 29 September 2023 Presentation + Paper

Designing freeform luminaire optics for additive manufacturing: lessons learned

Michael Zollers, Indika Perera, Jean Paul Freyssinier, Samuel Mills, Christopher Ring

Proceedings Volume 12670, 1267005 (2023) https://doi.org/10.1117/12.2676731

KEYWORDS: Design and modelling, Optical design, Light emitting diodes, Light sources and illumination, Optics manufacturing, Additive manufacturing, Lenses, Printing, Manufacturing, Freeform optics

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Proceedings Article | 3 October 2022 Presentation + Paper

Designing 3D-printed LED optics for optimizing target plane application efficacy

Indika Perera, Akila Udage, Nadarajah Narendran, Jean Paul Freyssinier, John Trublowski

Proceedings Volume 12216, 122160K (2022) https://doi.org/10.1117/12.2633620

KEYWORDS: Reflectors, Light emitting diodes, 3D printing, Optics manufacturing, Light sources and illumination, Reflector design, Reflectivity, Optical components, Optical design, Light sources

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Proceedings Article | 2 April 2019 Paper

Characterization of a Power-over-Ethernet (PoE)-based LED lighting system

Indika Perera, Dinusha Thotagamuwa, Jean Paul Freyssinier, Nadarajah Narendran

Proceedings Volume 10940, 109401K (2019) https://doi.org/10.1117/12.2510019

KEYWORDS: Light sources and illumination, Picosecond phenomena, LED lighting, Light emitting diodes, Switches, Palladium, Standards development, Electrical efficiency, Solids, Connectors

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Proceedings Article | 2 April 2019 Paper

Optical properties of 3D printed reflective and transmissive components for use in LED lighting fixture applications

Olivia Privitera, Yi-wei Liu, Indika Perera, Jean Paul Freyssinier, Nadarajah Narendran

Proceedings Volume 10940, 109401X (2019) https://doi.org/10.1117/12.2510063

KEYWORDS: Reflectivity, Light sources and illumination, LED lighting, Transmittance, 3D printing, Light emitting diodes, Optical properties, Optical components, Optics manufacturing, Printing

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SPIE Journal Paper | 12 May 2017 Open Access

Preliminary evaluation of discomfort glare from organic light-emitting diode and edge-lit light-emitting diode lighting panels

Xi Mou, Jean Paul Freyssinier, Nadarajah Narendran, John Bullough

JBO, Vol. 22, Issue 05, 055004, (May 2017) https://doi.org/10.1117/12.10.1117/1.JBO.22.5.055004

KEYWORDS: Organic light emitting diodes, Light emitting diodes, Light sources and illumination, Light sources

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Proceedings Article | 7 September 2016 Paper

Evaluation of OLED and edge-lit LED lighting panels

Xi Mou, Nadarajah Narendran, Yiting Zhu, Jean Paul Freyssinier

Proceedings Volume 9954, 995403 (2016) https://doi.org/10.1117/12.2240465

KEYWORDS: Organic light emitting diodes, Light emitting diodes, Light sources, Light sources and illumination, LED lighting, Solid state lighting, Light, Eye, Visualization

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Proceedings Article | 15 October 2012 Paper

Effect of different colored background lighting on LED discomfort glare perception

K. Sweater Hickcox, N. Narendran, J. Bullough, J. Freyssinier

Proceedings Volume 8484, 84840O (2012) https://doi.org/10.1117/12.968192

KEYWORDS: Light emitting diodes, Light sources and illumination, LED lighting, Light sources, Headlamps, Light, Halogens, Solid state lighting, Eye, CIE 1931 color space

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Proceedings Article | 24 August 2010 Paper

A two-metric proposal to specify the color-rendering properties of light sources for retail lighting

Jean Paul Freyssinier, Mark Rea

Proceedings Volume 7784, 77840V (2010) https://doi.org/10.1117/12.863063

KEYWORDS: Light sources, Light sources and illumination, Light, Light emitting diodes, LED lighting, Radium, Visualization, Metals, Luminous efficacy, Solid state electronics

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Proceedings Article | 24 August 2010 Paper

Application efficacy for comparing energy demand in lighting applications

Nadarajah Narendran, Jean Paul Freyssinier, Jennifer Taylor, Tianming Dong, Rosa Capó

Proceedings Volume 7784, 77840L (2010) https://doi.org/10.1117/12.863212

KEYWORDS: Light sources and illumination, Light emitting diodes, Light sources, LED lighting, Lamps, Temperature metrology, Near field, Light, Luminous efficacy, Visibility

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Proceedings Article | 12 September 2006 Paper

Luminance requirements for lighted signage

Jean Paul Freyssinier, Nadarajah Narendran, John Bullough

Proceedings Volume 6337, 63371M (2006) https://doi.org/10.1117/12.681422

KEYWORDS: Light emitting diodes, Visibility, Visualization, LED backlight, Light sources, Pollution, Light sources and illumination, LED lighting, Human subjects, Fourier transforms

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Proceedings Article | 12 September 2006 Paper

Reducing lighting energy use in retail display windows

Jean Paul Freyssinier, Daniel Frering, Jennifer Taylor, Nadarajah Narendran, Patricia Rizzo

Proceedings Volume 6337, 63371L (2006) https://doi.org/10.1117/12.681412

KEYWORDS: Light sources and illumination, Light emitting diodes, Data storage, Visualization, Lamps, Blue light emitting diodes, Visibility, Image storage, Halogens, General lighting

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Proceedings Article | 20 October 2004 Paper

White LED performance

Yimin Gu, Nadarajah Narendran, Jean Paul Freyssinier

Proceedings Volume 5530, (2004) https://doi.org/10.1117/12.567677

KEYWORDS: Light emitting diodes, Temperature metrology, Light sources and illumination, Thermal effects, LED lighting, Photodiodes, Resistance, Calibration, Analytical research, Packaging

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Proceedings Article | 26 January 2004 Paper

Evaluation of light-emitting diodes for signage applications

Jean Paul Freyssinier, Yutao Zhou, Vasudha Ramamurthy, Andrew Bierman, John Bullough, Nadarajah Narendran

Proceedings Volume 5187, (2004) https://doi.org/10.1117/12.507875

KEYWORDS: Light emitting diodes, Neon, Modulation, Manufacturing, Diffusers, Light sources and illumination, Spatial frequencies, Temperature metrology, Lamps, Transmittance

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This paper outlines two parts of a study designed to evaluate the use of light-emitting diodes (LEDs) in channel-letter signs. The first part of the study evaluated the system performance of red LED signs and white LED signs against reference neon and cold-cathode signs. The results show a large difference between the actual performance and potential savings from red and white LEDs. Depending on the configuration, a red LED sign could use 20% to 60% less power than a neon sign at the same light output. The light output of the brightest white LED sign tested was 15% lower than the cold-cathode reference, but its power was 53% higher. It appears from this study that the most efficient white LED system is still 40% less efficient than the cold-cathode system tested. One area that offers a great potential for further energy savings is the acrylic diffuser of the signs. The acrylic diffusers measured absorb between 60% and 66% of the light output produced by the sign. Qualitative factors are also known to play an important role in signage systems. One of the largest issues with any new lighting technology is its acceptance by the end user. Consistency of light output and color among LEDs, even from the same manufacturing batch, and over time, are two of the major issues that also could affect the advantages of LEDs for signage applications. To evaluate different signage products and to identify the suitability of LEDs for this application, it is important to establish a criterion for brightness uniformity. Building upon this information, the second part of the study used human factors evaluations to determine a brightness-uniformity criterion for channel-letter signs. The results show that the contrast modulation between bright and dark areas within a sign seems to elicit the strongest effect on how people perceive uniformity. A strong monotonic relationship between modulation and acceptability was found in this evaluation. The effect of contrast seems to be stronger than that of spatial frequency or background luminance, particularly for contrast modulation values of less than 0.20 or greater than 0.60. A sign with luminance variations of less than 20% would be accepted by at least 80% of the population in any given context.

Proceedings Article | 26 January 2004 Paper

Determining contrast sensitivity functions for monochromatic light emitted by high-brightness LEDs

Vasudha Ramamurthy, Nadarajah Narendran, Jean Paul Freyssinier, Ramesh Raghavan, Peter Boyce

Proceedings Volume 5187, (2004) https://doi.org/10.1117/12.509195

KEYWORDS: Light emitting diodes, Visualization, Spatial frequencies, Light sources, Contrast sensitivity, Light sources and illumination, Image quality, Light, Image analysis, Blue light emitting diodes

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Showing 5 of 20 publications

Conference Committee Involvement (1)

3D Printing for Lighting

22 August 2023 | San Diego, California, United States

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