About Exhibition SPIE Optics + Photonics 2026 will be held from 23rd - 27th August 2026 at San Diego Convention Center in San Diego, California, United States. This is the largest optics and photonics event, and it covers a wide range of topics, including optical design, manufacturing, testing, etc. The conference will feature over 2,000 technical papers, as well as a large exhibition with over 500 vendors. It is a great opportunity to learn about the latest advances in the field, network with other professionals, and see the latest products and services from leading companies.