Patent ID: 7336433
Filing Date: 2008-02-26
Classification: G02B

Abstract:
1. A focusable laser collimator comprising: an optical lens having an optical axis; a sliding lens holder for housing the lens, the sliding lens holder having a smaller diameter at a front and a larger diameter at a back and having a longitudinal opening parallel to the optical axis; a stationary lens holder ring for fitting to the front of the sliding lens holder and having a protruding key for receiving the longitudinal opening; a laser holder tube for holding a laser and having an external thread on an outer circumferential surface; and a focusing ring for receiving the back of the sliding lens holder and having internal thread on an internal circumferential surface, wherein when the focusing ring is rotated, the internal thread of the focusing ring interacts with the external thread of the laser holder tube to move the focusing ring along the optical axis and the protruding key travels within the longitudinal opening while preventing the sliding lens holder from rotating.