Patent ID: 9584779
Date: 2017-02-28
CPC Classifications: G02B,G02F,G03B,H04N

Claim:
1. An illumination unit, comprising: a light source device that includes a laser light source; an optical-path branching device configured to branch a light incident from the light source device into a first optical path of an illumination light and a second optical path; a photodetector configured to receive a light flux configured to travel on the second optical path; a first light control device configured to control a light quantity emitted by the laser light source, based on a quantity of the light flux received by the photodetector, a second light control device disposed between the optical-path branching device and the photodetector on the second optical path, wherein the second light control device is configured to control a light quantity in the light flux to be incident upon the photodetector.