2026 Proceedings
The proceedings of Nonimaging Optics: Efficient Design for Illumination and Concentration XXI have been published in Proceedings of SPIE, Volumes 14211 and PC14211, edited by Håkon Jarand Dugstad Johnsen, Thomas A. Cooper, and Lien Smeesters .
Proceedings at a Glance
8
Sessions
12
Published Papers
18
Recorded Presentations
Explore the published papers and presentations from the 2026 Nonimaging Optics conference, which was organized on 23-28 August 2026 in San Diego, California, United States.
Papers and Presentations
Solar Concentration and Receivers I
Formalization of the concentration ratio limits for asymmetric optics
Thomas A. Cooper
Published Paper
Recorded Presentation
Angularly selective cavities for high-temperature solar receivers
Recorded Presentation
Solar Concentration and Receivers II
A modular secondary concentrator for high-flux solar testing: design, experimental validation, and industrial scalability at 10 megawatts
Published Paper
Recorded Presentation
Analytic design of aspheric linear Fresnel lens for dehydrating process
Martín Jiménez-Rodríguez ; Maximino Avendaño-Alejo ; Gabriel Castillo-Santiago ; Jaqueline Cuervo-Flores ; Ismael Velázquez-Gómez ; Osvaldo Ponce-Hernández ; Carlos Augusto Flores-Meneses
Published Paper
Recorded Presentation
Parametric design of nonimaging concentrators by direct application of the edge-ray principle in CAD
T. A. Cooper ; Haoyun Zhao
Recorded Presentation
Thermophotovoltaics and Solar Energy
Storage integrated solar thermophotovoltaics: current developments and future prospects
Alejandro Datas ; Esther López ; Pablo García-Linares ; Juan Villa ; Alessandro Gallo ; Myrto Zeneli ; Nicolas Loubet ; Álvaro M. Medrano ; Daniel Milovich ; Ignacio Izquierdo ; Alicia López-Ceballos ; Saad Akhtar
Recorded Presentation
Angular control for improved spectral filtering in thermophotovoltaics
Recorded Presentation
Radiative Cooling and Infrared Energy Conversion
Greenhouse heat trapping control in enclosed spaces via Janus transparent radiative cooling
Published Paper
Recorded Presentation
Radiative cooling films for transparent windows
Seung Ah Yu ; Jae-Hyun Kim ; Sun-Kyung Kim
Recorded Presentation
LED Optics and Additive Manufacturing
Multi-LED illumination design benefitting spectroscopic sensing
Published Paper
Recorded Presentation
3D printed non-imaging baffle-optics for linear LED light fixtures
Published Paper
Recorded Presentation
Print parameter effects on thermal conductivity of 3D-printed heat sinks for LED system applications
Babajide Aremu ; Indika U. Perera
Published Paper
Recorded Presentation
Comparison of conventional copper PCB traces and 3D printed conductive ink-based PCB traces for lighting applications
Shalini Lakshika Jamburegoda Pathiranage ; Jean Paul Freyssinier
Published Paper
Recorded Presentation
Illumination Applications
Backlighted public transport push-buttons: from photometric characterisation towards improved visual contrast
Published Paper
Recorded Presentation
Comparison between aspherical concave Fresnel-type reflectors vs confocal parabolic mirrors for designing three-dimensional display systems
Maximino Avendaño-Alejo ; Martín Jiménez-Rodríguez ; Gabriel Castillo-Santiago ; Jaqueline Cuervo-Flores ; Osvaldo Ponce-Hernández ; Ismael Velázquez-Gómez ; Oliver Huerta-Carranza
Published Paper
Recorded Presentation
Nonimaging Optics Competition and Closing
Nonimaging optics design competition 2026: the square peg challenge
Håkon J. D. Johnsen ; Anadi Ranjan Barai ; Ganesh Varma Sunchu ; Hitaishi Chillara ; Jan M. Kaster ; Jean-Pierre Lauret ; John Hygelund ; Ludo Haenen ; YongXin Lai ; Thomas A. Cooper ; Lien Smeesters
Published Paper
Recorded Presentation
Poster Session
Characterization by ray tracing of the positioning of a parabolic reflector to optimize concentration in the Isthmus of Tehuantepec
Gabriel Castillo-Santiago ; Martín Jiménez-Rodríguez ; Víctor Iván Moreno-Oliva ; Maximino Avendaño Alejo ; Edwin Román-Hernández ; María-Fernanda Urbieta-Martínez ; Grecia Cajigas-Velázquez ; Osvaldo Ponce-Hernández ; Ismael Velázquez-Gomez
Published Paper