Dr. Julio Cesar Pinto Chaves Profile

Dr. Julio Cesar Pinto Chaves

Optical Scientist at Light Prescriptions Innovators Europe SL

SPIE Involvement:

Author

Publications (44)

Proceedings Article | 28 May 2018 Paper

Prescribed intensity patterns from extended sources by means of a wavefront-matching procedure

Simone Sorgato, Julio Chaves, Rubén Mohedano, Maikel Hernández, José Blen, Dejan Grabovickic, Hugo Thienpont, Fabian Duerr

Proceedings Volume 10693, 1069303 (2018) https://doi.org/10.1117/12.2313809

KEYWORDS: Wavefronts, Geometrical optics, Light emitting diodes, Optical design, Nonimaging optics, Freeform optics, Solid state lighting

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Proceedings Article | 2 November 2016 Presentation + Paper

Simultaneous calculation of three optical surfaces in the 3D SMS freeform RXI optic

Simone Sorgato, Julio Chaves, Rubén Mohedano, Maikel Hernández, José Blen, Pablo Benitez, Juan Miñano, Dejan Grabovickic, Hugo Thienpont, Fabian Duerr

Proceedings Volume 9955, 99550C (2016) https://doi.org/10.1117/12.2236916

KEYWORDS: Nonimaging optics, Freeform optics, Automotive lighting, Wavefronts, Light emitting diodes, Mirrors, Headlamps, Light, Beam controllers, Tolerancing

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Proceedings Article | 28 September 2016 Paper

Optical design of an ultrashort throw ratio projector with two freeform mirrors

Yunfeng Nie, Rubén Mohedano, Pablo Benítez, Julio Chaves, Juan Miñano, Hugo Thienpont, Fabian Duerr

Proceedings Volume 9947, 99470C (2016) https://doi.org/10.1117/12.2236613

KEYWORDS: Optimization (mathematics), Mirrors, Optical design, Distortion, Imaging systems, Projection systems, Off axis mirrors, Modulation transfer functions, Image quality, Ray tracing

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Proceedings Article | 13 October 2015 Paper

Étendue-squeezing light injector

Julio Chaves, Simone Sorgato, Pablo Benitez, Juan Miñano, Waqidi Falicoff, Ruben Mohedano

Proceedings Volume 9572, 95720J (2015) https://doi.org/10.1117/12.2189302

KEYWORDS: Light emitting diodes, Waveguides, LED backlight, Light sources, Light, Tablets, Geometrical optics, Nonimaging optics, Optics manufacturing, Dielectrics

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Proceedings Article | 23 September 2015 Paper

Design of freeform aplanatic systems

B. Narasimhan, P. Benitez, Juan Miñano, Julio Chaves, D. Grabovickic, Milena Nikolic, J. Infante

Proceedings Volume 9629, 96290C (2015) https://doi.org/10.1117/12.2190882

KEYWORDS: Artificial intelligence, Partial differential equations, Palladium, Monochromatic aberrations, Imaging systems, Freeform optics, Reflection, Mirrors, Optical design, Differential equations

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Proceedings Article | 23 September 2015 Paper

Freeform étendue-preserving optics for light and color mixing

Simone Sorgato, Rubén Mohedano, Julio Chaves, Aleksandra Cvetkovic, Maikel Hernández, Pablo Benítez, Juan Miñano, Hugo Thienpont, Fabian Duerr

Proceedings Volume 9629, 962905 (2015) https://doi.org/10.1117/12.2191048

KEYWORDS: Spherical lenses, Microlens, Light emitting diodes, Receivers, Lenses, Light, Freeform optics, Diffusers, Reflectors, Prototyping

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Proceedings Article | 3 September 2015 Paper

Design of three freeform mirror aplanat

B. Narasimhan, P. Benitez, Juan Miñano, Julio Chaves, D. Grabovickic, Milena Nikolic, J. Infante

Proceedings Volume 9579, 95790K (2015) https://doi.org/10.1117/12.2189097

KEYWORDS: Artificial intelligence, Monochromatic aberrations, Partial differential equations, Mirrors, Optics manufacturing, Imaging systems, Optical design, Freeform optics, Palladium, Reflection

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Proceedings Article | 25 August 2015 Paper

Efficient color mixing through étendue conservation using freeform optics

Simone Sorgato, Rubén Mohedano, Julio Chaves, Aleksandra Cvetkovic, Maikel Hernández, Pablo Benitez, Juan Miñano, Hugo Thienpont, Fabian Duerr

Proceedings Volume 9572, 95720G (2015) https://doi.org/10.1117/12.2186965

KEYWORDS: Spherical lenses, Light emitting diodes, Light, Sensors, Freeform optics, Microlens, Reflectors, Diffusers, Lenses, RGB color model

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Proceedings Article | 25 August 2015 Paper

Freeform aplanatic concentrators

B. Narasimhan, P. Benitez, Juan Miñano, Julio Chaves, D. Grabovickic, Milena Nikolic, J. Infante

Proceedings Volume 9572, 95720M (2015) https://doi.org/10.1117/12.2189092

KEYWORDS: Artificial intelligence, Solar concentrators, Partial differential equations, Monochromatic aberrations, Palladium, Freeform optics, Reflection, Mirrors, Optical design, Differential equations

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Proceedings Article | 18 December 2012 Paper

Inhomogeneous source uniformization using a shell mixer Köhler integrator

J. Chaves, A. Cvetkovic, R. Mohedano, O. Dross, M. Hernandez, P. Benítez, J. Miñano, J. Vilaplana

Proceedings Volume 8550, 85502X (2012) https://doi.org/10.1117/12.981004

KEYWORDS: Light emitting diodes, Light sources, Lenses, Light, Diffusers, Collimation, Channel projecting optics, Receivers, Reflectors, Prototyping

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SPIE Journal Paper | 16 October 2012

Experimental characterization of Fresnel-Köhler concentrators

Pablo Zamora, Pablo Benítez, Rubén Mohedano Arroyo, Aleksandra Cvetkovic, Juan Vilaplana, Yang Li, Maikel Hernández, Julio Chaves, Juan Miñano

JPE, Vol. 2, Issue 1, 021806, (October 2012) https://doi.org/10.1117/12.10.1117/1.JPE.2.021806

KEYWORDS: Solar concentrators, Prototyping, Electrical efficiency, Solar cells, Solar energy, Dispersion, Fresnel lenses, Temperature metrology, Sun, Optics manufacturing

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Proceedings Article | 11 October 2012 Paper

Primary optics for efficient high-brightness LED colour mixing

A. Cvetkovic, R. Mohedano, O. Dross, M. Hernandez, P. Benítez, J. Miñano, J. Vilaplana, J. Chaves

Proceedings Volume 8485, 84850Q (2012) https://doi.org/10.1117/12.931508

KEYWORDS: Light emitting diodes, Near field optics, Light sources, Collimation, Prototyping, Light, Reflectors, Reflectivity, Diffusers, Integrated optics

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Proceedings Article | 10 October 2012 Paper

1000x shadow-free mirror-based Köhler concentrator

Maikel Hernandez, Pablo Benítez, João Mendes-Lopes, Aleksandra Cvetkovic, Yupin Sun, Juan Carlos Miñano, Julio Chaves, Rubén Mohedano

Proceedings Volume 8468, 84680C (2012) https://doi.org/10.1117/12.931657

KEYWORDS: Solar concentrators, Solar cells, Glasses, Optics manufacturing, Mirrors, Sun, Optical components, Coating, Prisms, Antireflective coatings

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Proceedings Article | 23 September 2011 Paper

Free-form Fresnel RXI-RR Köhler design for high-concentration photovoltaics with spectrum-splitting

M. Buljan, P. Benítez, R. Mohedano, J. C. Miñano, Y. Sun, W. Falicoff, J. Vilaplana, J. Chaves, G. Biot, J. López

Proceedings Volume 8124, 81240H (2011) https://doi.org/10.1117/12.894404

KEYWORDS: Silicon, Solar concentrators, Receivers, Prototyping, Reflection, Prisms, Optical components, Bandpass filters, Optics manufacturing, Optical filters

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Proceedings Article | 22 September 2011 Paper

Free-form Fresnel RXI Köhler design with spectrum-splitting for photovoltaics

M. Buljan, P. Benítez, R. Mohedano, J. C. Miñano, Y. Sun, W. Falicoff, J. Vilaplana, J. Chaves, G. Biot, J. López

Proceedings Volume 8167, 81670I (2011) https://doi.org/10.1117/12.895526

KEYWORDS: Solar concentrators, Silicon, Optics manufacturing, Optical design, Photovoltaics, Prisms, Optical components, Prototyping, Solar cells, Reflection

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Proceedings Article | 21 September 2011 Paper

Imaging system applications of multichannel configuration

Jose Infante Herrero, Juan Carlos Miñano Dominguez, Pablo Benítez, Guillermo Biot, Hammed Ahmadpanahi, Wang Lin, JiaYao Liu, Julio Chaves, Marta de la Fuente

Proceedings Volume 8167, 81670L (2011) https://doi.org/10.1117/12.897286

KEYWORDS: Imaging systems, Ray tracing, Beam expanders, Optical design, Channel projecting optics, Wavefronts, Mirrors, Image quality, Telescopes

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Proceedings Article | 10 November 2010 Paper

Free-form Köhler nonimaging optics for photovoltaic concentration

Pablo Benítez, Juan Miñano, Pablo Zamora, Marina Buljan, Aleksandra Cvetković, Maikel Hernandez, Rubén Mohedano, Julio Chaves, Oliver Dross

Proceedings Volume 7849, 78490K (2010) https://doi.org/10.1117/12.873884

KEYWORDS: Solar concentrators, Sun, Fresnel lenses, Solar cells, Mirrors, Antireflective coatings, Tolerancing, Optics manufacturing, Optical design, Optical components

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Proceedings Article | 9 September 2010 Paper

Novel ideal nonimaging designs by multichanneling the phase-space flow

Juan Miñano, Pablo Benítez, Jiayao Liu, José Infante, Julio Chaves, Asunción Santamaría

Proceedings Volume 7652, 765220 (2010) https://doi.org/10.1117/12.870596

KEYWORDS: Reflectors, Light emitting diodes, Optical design, Mirrors, Channel projecting optics, Nonimaging optics, Manufacturing, Geometrical optics, Optical components

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Proceedings Article | 19 August 2010 Paper

CPV and illumination systems based on XR-Köhler devices

Maikel Hernandez, Aleksandra Cvetkovic, Pablo Benitez, Juan Carlos Miñano, Waqidi Falicoff, Yupin Sun, Julio Chaves, Ruben Mohedano

Proceedings Volume 7785, 77850A (2010) https://doi.org/10.1117/12.861968

KEYWORDS: Solar concentrators, Solar cells, Light emitting diodes, Mirrors, Sun, Glasses, Wavefronts, Reflectivity, Tolerancing, Collimators

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Proceedings Article | 18 August 2010 Paper

Performance comparison of Fresnel-based concentrator arrays

Rubén Mohedano, Aleksandra Cvetkovic, Pablo Benítez, Pablo Zamora, Juan Miñano, Julio Chaves, Maikel Hernandez, Marina Buljan, Juan Vilaplana

Proceedings Volume 7785, 778508 (2010) https://doi.org/10.1117/12.862253

KEYWORDS: Solar concentrators, Tolerancing, Manufacturing, Fresnel lenses, Optics manufacturing, Solar cells, Receivers, Diodes, Electrical efficiency, Optical components

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Proceedings Article | 18 August 2010 Paper

High performance Fresnel-based photovoltaic concentrator

Pablo Zamora, Pablo Benítez, Juan Miñano, Rubén Mohedano, Aleksandra Cvetkovic, Marina Buljan, Julio Chaves

Proceedings Volume 7785, 778504 (2010) https://doi.org/10.1117/12.860670

KEYWORDS: Solar concentrators, Fresnel lenses, Optics manufacturing, Tolerancing, Antireflective coatings, Optical components, Sun, Spherical lenses, Manufacturing, Solar cells

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Proceedings Article | 14 May 2010 Paper

Applications of the SMS method to the design of compact optics

Juan Miñano, Pablo Benítez, Jiayao Liu, José Infante, Julio Chaves, Lin Wang

Proceedings Volume 7717, 77170I (2010) https://doi.org/10.1117/12.855864

KEYWORDS: Reflectors, Optical design, Channel projecting optics, Light emitting diodes, Mirrors, Manufacturing, Geometrical optics, Lens design, Optics manufacturing

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Proceedings Article | 2 September 2008 Paper

Increased brightness by light recirculation through an LED source

Julio Chaves, Waqidi Falicoff, Bill Parkyn, Pablo Benítez, Juan Miñano

Proceedings Volume 7059, 705902 (2008) https://doi.org/10.1117/12.794626

KEYWORDS: Light emitting diodes, Reflectivity, Retroreflectors, Light, Mirrors, Reflectors, Collimators, Nonimaging optics, Ray tracing, Headlamps

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Proceedings Article | 11 September 2006 Paper

A superior architecture of brightness enhancement for display backlighting

Oliver Dross, William Parkyn, Julio Chaves, Waqidi Falicoff, Juan Carlos Miñano, Pablo Benitez, Roberto Alvarez

Proceedings Volume 6338, 63380G (2006) https://doi.org/10.1117/12.683208

KEYWORDS: Reflectivity, Light emitting diodes, Prisms, Waveguides, LCDs, Light sources, Reflectors, Diffusers, Reflection, Light scattering

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Proceedings Article | 11 September 2006 Paper

Geodesic lenses applied to nonimaging optics

Juan Miñano, Pablo Benítez, Bill Parkyn, Dejan Grabovickic, Fernando García, José Blen, Asunción Santamaría, Julio Chaves, Waqidi Falicoff

Proceedings Volume 6338, 633807 (2006) https://doi.org/10.1117/12.682128

KEYWORDS: Lenses, Light emitting diodes, Fiber optic illuminators, Refractive index, Waveguides, Dielectrics, Nonimaging optics, Lens design, Ray tracing, Geometrical optics

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Proceedings Article | 11 September 2006 Paper

Combination of light sources and light distribution using manifold optics

Julio Chaves, Waqidi Falicoff, Oliver Dross, Juan Carlos Miñano, Pablo Benitez, William Parkyn

Proceedings Volume 6338, 63380M (2006) https://doi.org/10.1117/12.683494

KEYWORDS: Waveguides, Light, Light sources, Mirrors, Light emitting diodes, Compound parabolic concentrators, Transformers, Optics manufacturing, 3D modeling, Geometrical optics

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Proceedings Article | 11 September 2006 Paper

Luminance enhancement of LED light sources for etendue-limited applications

Julio Chaves, Waqidi Falicoff, Pablo Benitez, Juan Carlos Miñano, William Parkyn, Oliver Dross

Proceedings Volume 6338, 63380L (2006) https://doi.org/10.1117/12.683298

KEYWORDS: Light emitting diodes, Reflectivity, Light, Light sources, Collimators, Reflectors, Mirrors, Collimation, LED displays, Blue light emitting diodes

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Proceedings Article | 3 August 2006 Paper

Geodesic lens: new designs for illumination engineering

Juan Miñano, Pablo Benítez, Bill Parkyn, Dejan Grabovickic, Fernando García, Asunción Santamaría, José Blen, Julio Chaves, Waqidi Falicoff

Proceedings Volume 6342, 634214 (2006) https://doi.org/10.1117/12.692271

KEYWORDS: Light emitting diodes, Fiber optic illuminators, Lens design, Refractive index, Waveguides, Dielectrics, Illumination engineering, Ray tracing, Microlens, Light

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Proceedings Article | 18 July 2006 Paper

Etendue preserving mixing and projection optics for high brightness LEDs applied to automotive headlamps

Aleksandra Cvetkovic, Oliver Dross, Julio Chaves, Pablo Benítez, Juan Miñano, Rubén Mohedano

Proceedings Volume 6342, 63420R (2006) https://doi.org/10.1117/12.692257

KEYWORDS: Light emitting diodes, Headlamps, Wavefronts, Mirrors, Reflectivity, Optical design, Projection systems, Light, Distortion, Legal

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Proceedings Article | 8 September 2005 Paper

Remote phosphor with recycling blue-pass mirror

Bill Parkyn, Julio Chaves, Waqidi Falicoff

Proceedings Volume 5942, 59420M (2005) https://doi.org/10.1117/12.619155

KEYWORDS: Light emitting diodes, Compound parabolic concentrators, Transmittance, Blue light emitting diodes, Absorption, Scattering, Optical filters, Mirrors, Solid state lighting, Reflectivity

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Proceedings Article | 22 August 2005 Paper

LED headlight architecture that creates a high quality beam pattern independent of LED shortcomings

Oliver Dross, Aleksandra Cvetkovic, Julio Chaves, Pablo Benitez, Juan Minano

Proceedings Volume 5942, 59420D (2005) https://doi.org/10.1117/12.624658

KEYWORDS: Light emitting diodes, Headlamps, Wavefronts, Mirrors, Optical design, Waveguides, Reflectivity, Lamps, Legal, Light sources

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Proceedings Article | 22 August 2005 Paper

PC-LED luminance enhancement due to phosphor scattering

Waqidi Falicoff, Julio Chaves, Bill Parkyn

Proceedings Volume 5942, 59420N (2005) https://doi.org/10.1117/12.619517

KEYWORDS: Light emitting diodes, Scattering, Refraction, Transmittance, Light scattering, Reflectors, Reflectivity, Gallium nitride, Domes, Absorption

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Proceedings Article | 20 August 2005 Paper

High-efficiency LED backlight optics designed with the flow-line method

Juan Minano, Pablo Benitez, Julio Chaves, Maikel Hernandez, Oliver Dross, Asuncion Santamaria

Proceedings Volume 5942, 594202 (2005) https://doi.org/10.1117/12.620238

KEYWORDS: Beam expanders, Polarization, Light emitting diodes, LCDs, LED backlight, Light scattering, Refractive index, Optical design, Collimators, Collimation

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Proceedings Article | 20 August 2005 Paper

Afocal video-pixel lens for tricolor LEDs

Julio Chaves, Juan Minano, Pablo Benitez

Proceedings Volume 5942, 594203 (2005) https://doi.org/10.1117/12.620148

KEYWORDS: Light emitting diodes, Light, Lens design, Optical design, Blue light emitting diodes, Video, Nonimaging optics, Large screens, Transform theory, Refractive index

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Proceedings Article | 29 September 2004 Paper

Virtual filaments that mimic conventional light bulb filaments

Julio Chaves, Fernando Munoz, Juan Carlos Minano, Pablo Benitez, Bill Parkyn, Waqidi Falicoff, Yupin Sun

Proceedings Volume 5529, (2004) https://doi.org/10.1117/12.561570

KEYWORDS: Light emitting diodes, Head, RGB color model, Light, Light sources, Retroreflectors, Lamps, Optical components, Optical design, Reflectors

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Proceedings Article | 29 September 2004 Paper

Review of SMS design methods and real world applications

Oliver Dross, Ruben Mohedano, Pablo Benitez, Juan Carlos Minano, Julio Chaves, Jose Blen, Maikel Hernandez, Fernando Munoz

Proceedings Volume 5529, (2004) https://doi.org/10.1117/12.561336

KEYWORDS: Light emitting diodes, Wavefronts, Collimators, Control systems, Light sources, Headlamps, Computer aided design, Light, Collimation, Reflection

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Proceedings Article | 29 September 2004 Paper

Simple optics that produce constant illuminance on a distant target

Julio Chaves, Waqidi Falicoff, Yupin Sun, Bill Parkyn

Proceedings Volume 5529, (2004) https://doi.org/10.1117/12.561282

KEYWORDS: Light emitting diodes, Mirrors, Collimation, Spherical lenses, Hybrid optics, Nonimaging optics, Lens design, Geometrical optics, Reflectors, Optical spheres

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SPIE Journal Paper | 1 July 2004

Simultaneous multiple surface optical design method in three dimensions

Pablo Gimenez-Benitez, Juan Carlos Miñano, Jose Blen, Rubén Mohedano Arroyo, Julio Chaves, Oliver Dross, Maikel Hernandez, Waqidi Falicoff

OE, Vol. 43, Issue 07, (July 2004) https://doi.org/10.1117/12.10.1117/1.1752918

KEYWORDS: Wavefronts, Optical design, Optical engineering, Light emitting diodes, Nonimaging optics, Geometrical optics, Headlamps, Light sources, Receivers, Spine

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Proceedings Article | 8 January 2004 Paper

SMS design method in 3D geometry: examples and applications

Pablo Benitez, Juan Minano, Jose Blen, Ruben Mohedano, Julio Chaves, Oliver Dross, Maikel Hernandez, Jose Alvarez, Waqidi Falicoff

Proceedings Volume 5185, (2004) https://doi.org/10.1117/12.506857

KEYWORDS: Wavefronts, Optical design, Light emitting diodes, Nonimaging optics, Headlamps, Receivers, Refraction, Geometrical optics, Refractive index, Mirrors

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Proceedings Article | 12 November 2003 Paper

Off-axis TIR lens for conformal luminaires

William Parkyn, Waqidi Falicoff, Juan Minano, Pablo Benitez, Julio Chavez, Yupin Sun

Proceedings Volume 5186, (2003) https://doi.org/10.1117/12.507827

KEYWORDS: Light emitting diodes, Beam shaping, Headlamps, Lamps, Roads, Skin, Collimation, Lens design, Patents, Sun

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Proceedings Article | 19 November 2001 Paper

Variable-geometry nonimaging optics devices

Julio Chaves, Manuel Collares-Pereira

Proceedings Volume 4446, (2001) https://doi.org/10.1117/12.448809

KEYWORDS: Mirrors, Solar concentrators, Nonimaging optics, Compound parabolic concentrators, Receivers, Objectives, Ray tracing, Light, Light sources, Lead

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Proceedings Article | 6 October 1999 Paper

Solar energy transmission and concentration by an optical fiber bundle with a frustum-type output end

Dawei Liang, Nuno Pires, Julio Chaves, Jose Semedo-Garcao, Luis Fraser Monteiro, M. L. Fraser Monteiro, Manuel Collares-Pereira

Proceedings Volume 3781, (1999) https://doi.org/10.1117/12.368247

KEYWORDS: Solar concentrators, Optical fibers, Solar energy, Polishing, Fiber optics, Laser crystals, Mirrors, Nonimaging optics, Solar radiation, Transformers

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Proceedings Article | 6 October 1999 Paper

New ideas for new solar concentrators

Julio Chaves, Manuel Collares-Pereira

Proceedings Volume 3781, (1999) https://doi.org/10.1117/12.368250

KEYWORDS: Solar concentrators, Compound parabolic concentrators, Mirrors, Sun, Solar energy, Geometrical optics, Reflectivity, Solar radiation, Physics, Nonimaging optics

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Proceedings Article | 6 October 1999 Paper

Transmission and concentration of solar radiation using a fiber bundle and a DCPC

Nuno Pires, Dawei Liang, Julio Chaves, Jose Semedo-Garcao, Luis Fraser Monteiro, Manuel Collares-Pereira

Proceedings Volume 3781, (1999) https://doi.org/10.1117/12.368249

KEYWORDS: Solar concentrators, Solar energy, Optical fibers, Laser crystals, Compound parabolic concentrators, Polishing, Adhesives, Liquids, Optical pumping, Solids

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Showing 5 of 44 publications

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