Patent ID: 8460069
Filing Date: 2013-06-11
Classification: B24B

Abstract:
1. A lens holder which holds a processing center portion of one optical surface of a processing target lens and is to be mounted on a lens holding shaft of an edging apparatus, said lens holder comprising a metal holder main body and an elastic member which is detachably attached to said holder main body and holds the processing center portion of the processing target lens, said holder main body having a fitting hole formed at a center of a front surface, and said elastic member including a fitting shaft portion to be slidably fitted in the fitting hole, and a lens holding portion integrally provided with the fitting shaft portion and having a size substantially the same as that of the front surface of said holder main body, and the lens holding portion having a rear surface which forms a gap with the front surface, such that a vicinity of a connecting portion with the fitting shaft portion is in contact with the front surface of said holder main body, the gap enlarging gradually from the vicinity of the connecting portion toward an outer circumferential edge of said lens holding portion, wherein when the processing target lens is urged against the lens holder, the lens holding portion of the elastic member undergoes an elastic deformation to an extent of the gap formed between the rear surface of the elastic member and the front surface of the holder main body to thereby come into a substantially stable contact with the optical surface of the processing target lens.