Patent ID: 6810213
Filing Date: 2004-10-26
Classification: G02B,H01L,H01S

Abstract:
An optical module comprisinga luminescence element for emitting light; a lens located near said luminescence element for collimating the light emitted from said luminescence element, said lens having a light-entering portion and a light-exiting portion along an optical axis, the light entering into the light-entering portion and exiting from the light-exiting portion; and a semiconductor substrate for mounting said luminescence element and said lens thereon, said semiconductor substrate having a pyramidal cavity defined by a predetermined number of inner walls, wherein said lens is mounted in said pyramidal cavity, one of the inner walls defining a front cavity wall near the light exiting portion and having a front edge that is perpendicular to the optical axis, the front cavity wall being shorter along an entire portion of the front edge than others of the inner walls for substantially reducing interference of the light.