Patent ID: 8070340
Filing Date: 2011-12-06
Classification: G02B

Abstract:
1. A light guiding member in a shape of a rod shape comprising: a light receiving portion formed on an end of the rod-shaped light guiding member in an axial direction of the rod-shaped light guiding member; and a knurled recess portion which extends in the axial direction, is formed on a side face thereof, wherein the knurled recess portion has two or more recesses, a side face of each recess in a light receiving portion side is a reflective surface, the reflective surface of at least one of the recesses having a primary reflective surface and a secondary reflective surface, wherein the secondary reflective surface is formed at an end of the primary reflective surface in the axial direction, and an inclination angle with respect to the axial direction of the secondary reflective surface is larger than that of the primary reflective surface.