Patent ID: 6985310
Filing Date: 2006-01-10
Classification: G02B

Abstract:
1. A method of production of an optical device comprising a first optical portion made of a first optical material and having a concavity and a second optical portion comprising a second optical material having a refractive index different from that of the first optical material, wherein the second optical portion is inserted into the concavity, the method of production comprising the steps of: injecting the first optical material into a metallic mold formed with a projection that projects out into a cavity to form the first optical portion having a concavity that reproduces the shape of the projection; filling the second optical portion in the concavity of the molded first optical portion; and flattening a bottom face of the second optical portion filled in the concavity, wherein the projection of the first optical portion has a substantially rotationally symmetric shape with respect to an optical axis, and the section of shape of the surface of the projection is substantially an arc, and wherein, in the flattening step, the surface of the second optical portion is polished so that a flat plane substantially vertical with respect to the symmetry axis of the concavity reproducing the shape of the projection is formed.