Patent ID: 9632239
Date: 2017-04-25
CPC Classifications: G02B,H04N

Claim:
1. A linear light source configured to emit light beams for illuminating a surface of a target, said linear light source comprising: a light guide having: a light-emitting unit for emitting light beams to propagate along said light guide and exit through said light converging convex surface; and a reflecting layer disposed on said first and second reflecting surfaces; wherein said light converging convex surface is a convex surface with multiple radii of curvature, a portion of the light beams being reflected by said first and second reflecting surfaces so as to form parallel light beams, another portion of the light beams forming direct light beams, said light converging convex surface directing said parallel light beams and said direct light beams to converge respectively at multiple points disposed along an optical axis of said light guide directed toward the surface of the target, such that portions of the target disposed within a range defined by the multiple points are evenly illuminated by the light beams directed by said light converging convex surface.