An optical joint for joining a first light transmissive material to a second light transmissive material. The joint comprises a transparent adhesive layer between the first and second materials, and an antireflection film between each of the first and second materials and the adhesive layer. The joint...http://www.google.ca/patents/US4794033?utm_source=gb-gplus-sharePatent US4794033 - Optical joint comprising antireflection films
