Technical Event
Lens Design Technical Event
23 August 2022 • 8:00 PM - 10:00 PM PDT | Marriott Marquis, Marina Ballroom D 
Session Chair: Rich Pfisterer, Photon Engineering, LLC (United States)

"Let's Give 'Em Something to Talk About!"

Lens designers! Join us for our annual gathering to meet and discuss…lens design! Let’s talk about what we’re designing, how we’re going about doing it (what materials, software, techniques, etc.), and which problems we’re encountering. We’ll also explore current technical and commercial trends in the marketplace.

This year's invited speakers will be Julie L. Bentley and David H. Lippman of the University of Rochester (United States), whose talk is entitled "Freeform gradient-index materials: a new type of freeform optic." Gradient index (GRIN) optical systems are not new, having been studied for over 50 years. However, most of this effort was focused on optical designs using conventional GRIN materials (e.g. axial or radial gradients) with rotationally invariant index of refraction profiles. Current interest in freeform surfaces has shown that they enable irregular system geometries with high optical performance by leveraging rotational variance. Recent advancements in the fabrication of GRIN materials with additive manufacturing have enabled a new type of freeform optic using a freeform gradient index (F-GRIN) material. When variant transversely, F-GRIN behaves similarly to freeform surfaces. By introducing a longitudinal refractive index variation as well, F-GRIN optical behavior deviates from that of freeform surfaces due to the effect of volume propagation. This talk will discuss the new optical design tools developed at the Univ. of Rochester for F-GRIN imaging and illumination systems, the benefits of F-GRIN, and show exciting new results from fabricated systems.

Part of the Current Developments in Lens Design and Optical Engineering XXIII conference.

Cosponsored by:



Light refreshments sponsored by:

The Optical Solutions Group at