Patent ID: 6359733
Filing Date: 2002-03-19
Classification: G02B,G02F

Abstract:
A process for producing a composite optical element comprising the steps of:forming a plurality of first grooves at predetermined intervals in a first optical material; forming a plurality of second grooves at predetermined intervals in a second optical material; bonding the first optical material having the first grooves and the second optical material having the second grooves together, with their grooves and lands staggered to fit each other, through an adhesive to provide a composite block; grinding one side of the composite block to a thickness where both surfaces of the first and second optical materials are exposed; bonding a third optical material, with a first plane on one side thereof, to the first ground surface of the composite block, through an adhesive; and grinding the side opposite to the first ground surface of the composite block to a given thickness where the surfaces of both the first and second optical materials are exposed.