Patent ID: 7630150
Filing Date: 2009-12-08
Classification: G02B

Abstract:
1. An objective lens module, comprising: an objective lens; a cylindrical lens holder that holds the objective lens in an opening delimited by a cylindrical wall of the cylindrical lens holder proximate to one end of the opening of the cylindrical wall of the cylindrical lens holder; and a reinforcement part fixed to the cylindrical lens holder and at least partially disposed in the opening of the cylindrical wall of the cylindrical lens holder proximate to another end of the opening which is opposite to the objective lens; wherein the reinforcement part which is at least partially disposed in the another end of the opening has a thickness in a direction transverse to an axis of the cylindrical lens holder which is greater than a thickness in the direction transverse to the axis of the cylindrical lens holder of at least a portion of the cylindrical wall of the cylindrical lens holder which extends from the another end of the opening toward the one end of the opening where the objective lens is held so as to enhance the stiffness of the cylindrical lens holder at least proximate to the another end of the opening.