Patent ID: 9714865
Date: 2017-07-25
CPC Classifications: G01J,G01N,G02B

Claim:
1. A light condensing unit comprising: a reflection member having a hollow dome shape, a side wall of the dome shape being curved to be extended from a top portion toward a bottom portion, the reflection member having a mirror-finished inner surface; a plurality of light irradiation members arranged around an outer wall of the reflection member and configured to irradiate an irradiation region of the top portion with light through a first opening portion formed in the outer wall, wherein the reflection member includes wherein the reflection member guides light coming from the irradiation region and being reflected by the inner surface to the light receiving lens; and a collimating lens between the second opening portion of the reflection member and the light receiving lens, and wherein the collimating lens and the light receiving lens constitute a collimator configured to correct light coming from the irradiation region and being reflected by the inner surface of the reflection member to produce parallel light.