Prof. Pablo Benítez Profile

Prof. Pablo Benítez

at Univ Politecnica de Madrid

SPIE Involvement:

Author | Editor | Instructor

Area of Expertise:

Optical Design , Freeform Optics , Photovoltaic Concentration , Nonimaging Optics , Solid Stata Lighting

Publications (139)

Proceedings Article | 19 November 2021 Paper

Exploring the limits of CLOVER: a multichannel optics for VR and MR

Rubén Mohedano, P. Benítez, D. Grabovičkić, P. Zamora, M. Nikolic, M. Buljan, J. C. Miñano, E. Sanchez, J. Chaves, J. López, E. Pérez, J. Vilaplana, J. C. González

Proceedings Volume 12078, 1207802 (2021) https://doi.org/10.1117/12.2603610

KEYWORDS: Virtual reality, Image segmentation, Image resolution, Freeform optics, Channel projecting optics, Modulation transfer functions, Mixed reality, Data transmission, Spatial resolution, Lenses

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Proceedings Article | 28 March 2021 Presentation

Multi-channel optics for virtual and mixed reality: present and future

Pablo Benítez, Juan Minano, Dejan Grabovickic, Julio Chaves, Milena Nikolic, Pablo Zamora, Marina Buljan, Ruben Mohedano, Eduardo Sanchez, Juan Gonzalez

Proceedings Volume 11765, 1176506 (2021) https://doi.org/10.1117/12.2585214

KEYWORDS: Virtual reality, Mixed reality, Freeform optics, Channel projecting optics, Polarization, Optical resolution, Optical design, Head-mounted displays, Distortion

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Proceedings Article | 6 March 2021 Presentation

Progress in multi-channel optics for virtual and mixed reality head-mounted displays

Pablo Benítez, Juan C. Minano, Dejan Grabovickic, Pablo Zamora, Marina Buljan, Milena Nikolic, Julio Chaves, Ruben Mohedano, Jesus Lopez, Eduardo Sanchez, Juan Vilaplana, Eduardo Perez, Juan C. Gonzalez

Proceedings Volume 11708, 117080H (2021) https://doi.org/10.1117/12.2583845

KEYWORDS: Virtual reality, Mixed reality, Head-mounted displays

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Proceedings Article | 24 February 2020 Presentation + Paper

Notes on the design of free-form optics

R. Mohedano, P. Benítez, M. Nikolić, J. Chaves, J.C. Miñano, D. Grabovičkić, M. Buljan, P. Zamora

Proceedings Volume 11299, 1129904 (2020) https://doi.org/10.1117/12.2547832

KEYWORDS: Wavefronts, Geometrical optics, Freeform optics, Computer aided design, Optical design, Virtual reality, Optics manufacturing, Lamps, Light emitting diodes

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Proceedings Article | 21 May 2018 Paper

Ultra-compact multichannel freeform optics for 4xWUXGA OLED microdisplays

Marina Buljan, Bharathwaj Narasimhan, Pablo Benítez, Juan Carlos Miñano, Jesús López, Dejan Grabovičkić, Milena Nikolić, Eduardo Pérez, Jorge Gorospe, Eduardo Sanchez, Juan Carlos González, Pablo Zamora, Rubén Mohedano

Proceedings Volume 10676, 1067607 (2018) https://doi.org/10.1117/12.2307452

KEYWORDS: Freeform optics, Aspheric lenses, Organic light emitting diodes, Lenses, Image resolution, Prototyping, Optical design

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Proceedings Article | 27 November 2017 Paper

Freeform aplanatism

J. Miñano, P. Benitez, D. Grabovickic, B. Narasimhan, M. Nikolic, J. Infante

Proceedings Volume 10590, 105900S (2017) https://doi.org/10.1117/12.2286629

KEYWORDS: Geometrical optics, Freeform optics, Nonimaging optics, Optical design, Aberration theory

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Proceedings Article | 26 June 2017 Paper

Super-resolution optics for virtual reality

Dejan Grabovičkić, Pablo Benitez, Juan Miñano, Pablo Zamora, Marina Buljan, Bharathwaj Narasimhan, Milena Nikolic, Jesus Lopez, Jorge Gorospe, Eduardo Sanchez, Carmen Lastres, Ruben Mohedano

Proceedings Volume 10335, 103350G (2017) https://doi.org/10.1117/12.2270178

KEYWORDS: Eye, Image resolution, Virtual reality, Optical design, Distortion, Lens design, Prototyping, Modulation transfer functions, Super resolution, Freeform optics, Optical tracking

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Proceedings Article | 26 June 2017 Paper

Advanced freeform optics enabling ultra-compact VR headsets

Pablo Benitez, Juan Miñano, Pablo Zamora, Dejan Grabovičkić, Marina Buljan, Bharathwaj Narasimhan, Jorge Gorospe, Jesús López, Milena Nikolić, Eduardo Sánchez, Carmen Lastres, Ruben Mohedano

Proceedings Volume 10335, 103350I (2017) https://doi.org/10.1117/12.2270317

KEYWORDS: Lens design, Eye, Freeform optics, Optical design, Refraction, Virtual reality, Prototyping, Lenses, Image quality, Geometrical optics, Microlens array

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Proceedings Article | 26 June 2017 Paper

Time multiplexing for increased FOV and resolution in virtual reality

Juan Miñano, Pablo Benitez, Dejan Grabovičkić, Pablo Zamora, Marina Buljan, Bharathwaj Narasimhan

Proceedings Volume 10335, 1033504 (2017) https://doi.org/10.1117/12.2269973

KEYWORDS: Time division multiplexing, Head, Head-mounted displays, LCDs, Switching, Multiplexing, Virtual reality, Camera shutters, Channel projecting optics, Image resolution, Eye, Multichannel imaging systems, Organic light emitting diodes, Glasses

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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 | 29 September 2016 Paper

Design of compact optical systems using multichannel configurations

Milena Nikolic, Juan Miñano, P. Benítez, B. Narasimhan, J. Mendes-Lopes, P. Zamora, M. Buljan, D. Grabovickic

Proceedings Volume 9948, 99480M (2016) https://doi.org/10.1117/12.2237641

KEYWORDS: Nonimaging optics, Optical design, Head-mounted displays, Imaging systems, Head, Optics manufacturing, Solar concentrators, Eye, Prototyping, Multichannel imaging systems

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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 | 7 September 2016 Paper

Recent advances in the SMS design method: 3D aplanatism and diffraction

Juan Miñano, P. Benitez, B. Narasimhan, M. Nikolic, J. Mendes-Lopes, D. Grabovickic

Proceedings Volume 9955, 99550D (2016) https://doi.org/10.1117/12.2237402

KEYWORDS: Optical design, Freeform optics, Diffraction, Wavefronts, Imaging systems, Optical components, Monochromatic aberrations, Mirrors, Nonimaging optics, Imaging spectroscopy

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SPIE Journal Paper | 5 April 2016

Optical design through optimization for rectangular apertures using freeform orthogonal polynomials: a case study

Milena Nikolic, Pablo Benítez, Bharathwaj Narasimhan, Dejan Grabovickic, Jayao Liu, Juan Carlos Miñano

OE, Vol. 55, Issue 07, 071204, (April 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.7.071204

KEYWORDS: Optical design, Mirrors, Modulation transfer functions, Optical spheres, Optical engineering, Freeform optics, Aspheric lenses, Computer aided design, LCDs, Optical components

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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 | 23 September 2015 Paper

Design of diffractive optical surfaces within the nonimaging SMS design method

João Mendes-Lopes, Pablo Benítez, Juan Miñano

Proceedings Volume 9629, 96290O (2015) https://doi.org/10.1117/12.2191976

KEYWORDS: Wavefronts, Nonimaging optics, Electroluminescent displays, Optical design, Computer generated holography, Spherical lenses, Colorimetry, Chromatic aberrations, Refractive index, Direct methods

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Proceedings Article | 23 September 2015 Paper

Optical design through optimization using freeform orthogonal polynomials for rectangular apertures

Milena Nikolic, P. Benítez, Juan Miñano, D. Grabovickic, Jiayao Liu, B. Narasimhan, M. Buljan

Proceedings Volume 9626, 96260V (2015) https://doi.org/10.1117/12.2191068

KEYWORDS: Modulation transfer functions, Mirrors, Optical design, Optics manufacturing, Freeform optics, Off axis mirrors, Patents, Zernike polynomials, Spatial frequencies, Optical spheres

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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

Design of diffractive optical surfaces within the SMS design method

João Mendes-Lopes, Pablo Benítez, Juan Miñano

Proceedings Volume 9572, 95720K (2015) https://doi.org/10.1117/12.2189102

KEYWORDS: Wavefronts, Optical design, Nonimaging optics, Electroluminescent displays, Spherical lenses, Colorimetry, Computer generated holography, Refractive index, Direct methods, Control systems

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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 | 17 December 2014 Paper

Initial design with L2 Monge-Kantorovich theory for the Monge–Ampère equation method of freeform optics

Rengmao Wu, Yaqin Zhang, Pablo Benítez, Juan Miñano

Proceedings Volume 9293, 92930M (2014) https://doi.org/10.1117/12.2072370

KEYWORDS: Shape memory alloys, Beam shaping, Collimation, Numerical analysis, Reflectors, Light sources, Optical design, Freeform optics, Associative arrays, Wavefronts

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Proceedings Article | 25 September 2014 Paper

Optimization of optical systems for LED spot lights concerning the color uniformity

Anne Teupner, Krister Bergenek, Ralph Wirth, Juan Miñano, Pablo Benítez

Proceedings Volume 9190, 91900J (2014) https://doi.org/10.1117/12.2060849

KEYWORDS: Light sources, Reflectors, Light emitting diodes, Lenses, Optical components, Light scattering, Scattering, Particles, Visualization, Light

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Proceedings Article | 25 September 2014 Paper

Double surface imaging designs with unconstrained object to image mapping under rotational symmetry

Jiayao Liu, Juan Miñano, Pablo Benítez

Proceedings Volume 9192, 919205 (2014) https://doi.org/10.1117/12.2060680

KEYWORDS: Wavefronts, Differential equations, Reflectivity, Optical design, Geometrical optics, Freeform optics, Image processing, Singular optics, Monochromatic aberrations, Numerical analysis

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Proceedings Article | 5 September 2014 Paper

Conditions for perfect focusing multiple point sources with the SMS design method

P. Benítez, Juan Miñano, Milena Nikolic, Jiayao Liu, Jose Infante, Fabian Duerr

Proceedings Volume 9191, 919102 (2014) https://doi.org/10.1117/12.2062594

KEYWORDS: Lens design, Geometrical optics, Image processing, Aspheric lenses, Optical design, Image segmentation, Compound parabolic concentrators, Lead, Ray tracing, Visualization

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SPIE Journal Paper | 10 July 2014 Open Access

Recent trends in concentrated photovoltaics concentrators’ architecture

Marina Buljan, João Mendes-Lopes, Pablo Benítez, Juan Carlos Miñano

JPE, Vol. 4, Issue 01, 040995, (July 2014) https://doi.org/10.1117/12.10.1117/1.JPE.4.040995

KEYWORDS: Solar concentrators, Fresnel lenses, Photovoltaics, Solar cells, Optical design, Mirrors, Sun, Solar energy, Glasses, Reflectivity

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Proceedings Article | 1 May 2014 Paper

Single optical surface imaging designs with unconstrained object to image mapping with non-rotational symmetry

Jiayao Liu, Juan Miñano, Pablo Benítez

Proceedings Volume 9131, 91310B (2014) https://doi.org/10.1117/12.2051939

KEYWORDS: 3D image processing, Singular optics, Optical design, Reflectivity, Differential equations, Monochromatic aberrations, Eye, Geometrical optics, Wavefronts, Numerical analysis

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Proceedings Article | 27 February 2014 Paper

Merit function for the evaluation of color uniformity in the far field of LED spot lights

Anne Teupner, Krister Bergenek, Ralph Wirth, Juan Miñano, Pablo Benítez

Proceedings Volume 9003, 900303 (2014) https://doi.org/10.1117/12.2043545

KEYWORDS: Visualization, Light emitting diodes, Lamps, Light sources, Halogens, Optical components, Reflectors, Color difference, Signal to noise ratio, Color vision

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Proceedings Article | 18 September 2013 Paper

New Fresnel Köhler optical design: 9-fold photovoltaic concentrator

João Mendes-Lopes, Pablo Benítez, Pablo Zamora, Juan Carlos Miñano

Proceedings Volume 8834, 88340A (2013) https://doi.org/10.1117/12.2024050

KEYWORDS: Solar concentrators, Optical design, Solar cells, Photovoltaics, Fresnel lenses, Sun, Optics manufacturing, Tolerancing, Ray tracing, Coating

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Proceedings Article | 9 September 2013 Paper

9-fold Fresnel-Köhler concentrator for increased uniform irradiance on high concentrations

João Mendes-Lopes, Pablo Benítez, Pablo Zamora, Juan Carlos Miñano

Proceedings Volume 8821, 88210F (2013) https://doi.org/10.1117/12.2024156

KEYWORDS: Solar concentrators, Fresnel lenses, Sun, Photovoltaics, Silicon, Optical design, Ions, Neodymium, Thermal effects, Optics manufacturing

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Proceedings Article | 9 September 2013 Paper

Development and characterization of an FK photovoltaic concentrator for maximum conversion efficiency

Pablo Zamora, Maikel Hernández, Juan Vilaplana, Pablo Benítez, Rubén Mohedano, Juan Miñano

Proceedings Volume 8821, 88210G (2013) https://doi.org/10.1117/12.2024017

KEYWORDS: Solar concentrators, Solar cells, Photovoltaics, Prototyping, Fresnel lenses, Homogenization, Solar energy, Optics manufacturing, Temperature metrology, Concentrated solar cells

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