Nonimaging Optics Conference

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Nonimaging Optics: Efficient Design for Illumination and Concentration XXI

Part of SPIE Optics + Photonics 2026
San Diego, California, USA · 23–27 August 2026

Next up: Online Minisymposium

December 8, 2025 · 15:00–17:00 CET

Join us as we kick off the 2026 conference season with an online minisymposium!

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About the Conference

The Nonimaging Optics conference at SPIE Optics + Photonics is the main annual meeting for researchers in nonimaging optics, illumination design, and solar concentration optics. We feature presentations ranging from foundational theory to cutting-edge applications.

Join us for our online minisymposium on December 8, 2025, as we prepare for the Nonimaging Optics conference in San Diego in August 2026!

Online Minisymposium

December 8, 2025 · 15:00–17:00 CET

Julius Muschaweck Henning Rehn Martijn Anthonissen

Invited Talks

Get inspired by high-quality invited talks from leading researchers in nonimaging optics!

Call for Papers Launch

Get ready to submit your research for the 2026 conference, as we launch this year's call for papers!

Design Competition Kickoff

Are you ready to take on the challenge? Learn about our new optical design competition for 2026!

Free registration · Webinar link provided via email

View Full Details and Register

2025 Conference Highlights

Thank you to everyone who participated in our 20th anniversary conference

5
Invited Speakers
2
Conference Days
21
Presentations
14
Countries

Optical Design Competition: 2025 Results

This year's competition winners were Ludo Haenen (Signify) for the overall best submission at 53.3% efficiency, and Alex Lehmann (UNSW) for the best submission among conference attendees at 31.4% efficiency.

Congratulations to both winners for their impressive designs!

Best Student & Postdoc Presentation: 2025

This year's award was a tie between Wai Qian Tham (Trinity College Dublin) and Zijun Zhang (Zhejiang University).

Congratulations to both winners for their outstanding presentations!

Browse 2025 program View 2025 proceedings Read 2025 wrap-up

Calls

2026 Call for Papers

The 2026 call for papers will be announced soon. Check back here for updates!

2025 Call for Papers

The call for papers for the 2025 conference closed on 12 February 2025, with post‑deadline submissions accepted through 16 June 2025.

View 2025 call