Patent ID: 6757112
Filing Date: 2004-06-29
Classification: G02B

Abstract:
A lens assembly comprising:a lens housing having an inner side wall and hollow interior, wherein the lens housing is made of a metallic or nonmetallic lens-housing material; a first lens received in the hollow interior, wherein the first lens is not affixed to the inner side wall; a second lens received in the hollow interior and axially spaced from the first lens, wherein the second lens is not affixed to the inner side wall; an annular first retainer within the hollow interior and disposed between and contacting the first lens and the second lens, wherein the first retainer is made of a metallic or nonmetallic first-retainer material; and a first-retainer joint affixing the first retainer to the inner side wall of the housing, wherein the first-retainer joint is made of a metallic or nonmetallic first-retainer joint material selected from the group consisting of the metallic or nonmetallic lens-housing material, the metallic or nonmetallic first-retainer material, and a solder.