Patent ID: 7652831
Filing Date: 2010-01-26
Classification: G02B

Abstract:
1. A lens barrel in which a lens system including at least front, intermediate and rear lens components arranged separately from one another in an axial direction is installed, said lens barrel comprising: a cylindrical lens holding barrel forming a part of said lens barrel for fixedly holding said front, intermediate and rear lens components; and spacer means fitted in said cylindrical lens holding barrel for positioning said front and rear lens components at a predetermined axial distance from each other, wherein said spacer means comprises a cylindrical spacer ring for receiving said intermediate lens component therein and a retaining member for retaining said intermediate lens component in said cylindrical spacer ring, and wherein said cylindrical spacer ring has an external wall fitted in said cylindrical lens holding barrel, and front and rear abutment ends at which said cylindrical spacer ring abuts on said front and said rear lens component, respectively.