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Conference Updates

Abstract Deadline Extended

Did you want to prepare an abstract for the conference but didn’t have enough time? Great news! The abstract submission deadline has been extended to February 17th, 2026.

This gives you a few extra days to finalize and submit your work. Don’t miss this opportunity to be part of our twenty-first Nonimaging Optics conference. Check out the call for papers for full details.

We look forward to receiving your abstract and seeing you in San Diego this August!

Abstract Deadline Extended - New Deadline: Tuesday, February 17, 2026

Minisymposium Recordings and Slides Now Available

Thank you to everyone who joined us for the online minisymposium on December 8, 2025!

All recordings and presentation slides from the symposium are now available on the symposium page. You can watch the invited talks from Martijn Anthonissen, Julius Muschaweck, and Henning Rehn, as well as the introduction to this year’s design competition.

Minisymposium Recordings Available

Announcing the Nonimaging Optics Design Competition 2026

We are excited to announce the launch of our Nonimaging Optics Design Competition 2026 - The Square Peg Challenge! Can you fit a square peg through a round hole?

Your task is to design a reflective optical system that takes all light emitted from a cube-shaped source and guides it into a circular opening. The étendue is perfectly matched, so in theory it’s possible. The only question is: How?

Go to the competition page and start designing today. The submission deadline is June 1st, 2026.

May the best design shine through!

Square Peg Challenge 2026

Call for Papers Open for 2026 Conference

We are pleased to announce that the call for papers is now open for the conference on “Nonimaging Optics: Efficient Design for Illumination and Concentration XXI” at SPIE Optics + Photonics 2026.

See our call for papers for more details and abstract submission! The deadline for abstract submissions is February 11, 2026.

We look forward to receiving your contributions and seeing you in San Diego in August 2026!

Call for Papers 2026

Online Minisymposium - December 8, 2025

Join us online on December 8, 2025 for a minisymposium to kick off the next Nonimaging Optics conference! We will feature three invited talks, the launch of our call for papers, and the introduction of next year’s optical design competition.

The symposium runs from 15:00-17:00 CET and is free and open to everyone. See the symposium page for more details and registration.

Online Minisymposium