Title:
LIGHT IRRADIATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/044418
Kind Code:
A1
Abstract:
A light irradiation device (1) according to the present invention is provided with a light source (11), an optical member (20) and a sensor (30). The light source (11) emits light (L0). The optical member (20) is supported so as to rotate about a rotation axis (AR) and comprises a prism part (22) that emits detection light (L4) based on the light (L0). The sensor (30) receives the detection light (L4) and detects the light quantity of the detection light (L4). The light quantity of the detection light (L4) received by the sensor (20) changes in accordance with the position of the optical member (20) in the rotational direction (E) during the rotation of the optical member (20).
Inventors:
HEISHI AKINORI (JP)
OSHIMA RITSUYA (JP)
SUWA MASASHIGE (JP)
OSHIMA RITSUYA (JP)
SUWA MASASHIGE (JP)
Application Number:
PCT/JP2018/031636
Publication Date:
March 05, 2020
Filing Date:
August 28, 2018
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F21S41/143; F21S41/20; F21S41/63; F21V5/00; F21V5/02; F21V5/08; F21V14/06; F21V23/00
Domestic Patent References:
| WO2014057681A1 | 2014-04-17 |
Foreign References:
| JP2009176508A | 2009-08-06 |
Attorney, Agent or Firm:
YAMAGATA Yoichi et al. (JP)
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