Patent ID: 7916410

Claim:
A method for making a lens, comprising: providing a first sub-lens and a second sub-lens; the first sub-lens including a recess defined therein, a flat bottom surface in the recess, and a first optical surface facing away from the bottom surface, the first optical surface portion defining a first optical axis; the second sub-lens being shaped so as to be fittingly received in the recess, the second sub-lens comprising a flat combining surface facing the bottom surface, the second sub-lens comprising a second optical surface substantially opposite to the combining surface, the second optical surface defining a second optical axis; applying a layer of curable glue to the bottom surface of the recess or the combining surface; placing the second sub-lens in the recess; and curing the curable glue while adjusting one of or both the first sub-lens and the second sub-lens so that first optical axis is aligned with the second optical axis.