Patent ID: 9638855
Date: 2017-05-02
CPC Classifications: G02B,H04N

Claim:
1. An illumination apparatus comprising: a light source; and a light guide formed in a rod shape, wherein a first end surface in a longitudinal direction is a first incident surface that receives light emitted from the light source, wherein a plurality of patterns for diffusing light are formed on a first area of the light guide and a second area of the light guide, the first area closer to the first incident surface than the second area, wherein intervals between at least some of the patterns formed in a first region of the first area closest to the first incident surface are smaller than intervals between at least some of the patterns formed in a first region of the second area closest to the first incident surface, and wherein a dimension of the patterns formed in the first area is smaller than a dimension of the patterns formed in the second area.