Title:
光源装置及びこの光源装置を有する画像投影装置
Document Type and Number:
Japanese Patent JP6394693
Kind Code:
B2
Abstract:
A light source device capable of contributing to an improvement in safety to laser beam is provided, even if a situation that a diffusion member does not exist in a traveling optical path of the laser beam in a normal state occurs. The light source device of the present invention includes a light source section (1) that emits laser beam (P), a diffusion member (8) that is provided in a traveling optical path of the laser beam (P) and transmits the laser beam (P) while diffusing the laser beam, a detection element (20) that detects whether the diffusion member (8) exists in the traveling optical path of the laser beam in a normal state by a physical characteristic of the diffusion member (8) and outputs a state detecting signal, and an abnormal state determiner (30a) that has a predetermined threshold to determine whether the diffusion member exists in the traveling optical path in a normal state and determines an abnormal state of the diffusion member (8) by comparing the state detecting signal with the threshold. The light source section (1) is controlled in a direction where an output of the laser beam (P) is reduced when the abnormal state is determined by the abnormal state determiner (30a).
Inventors:
Takehiro Nishimori
Kazuhiro Fujita
Toshiharu Murai
Tatsuya Takahashi
Kazuhiro Fujita
Toshiharu Murai
Tatsuya Takahashi
Application Number:
JP2016508447A
Publication Date:
October 03, 2018
Filing Date:
October 15, 2014
Export Citation:
Assignee:
株式会社リコー
International Classes:
G03B21/14; F21S2/00; F21V23/00; F21V25/04; H04N5/74; H05B37/02
Domestic Patent References:
| JP2010231063A | ||||
| JP2008271423A | ||||
| JP2008180921A | ||||
| JP201213891A |
Foreign References:
| WO2007138880A1 |
Attorney, Agent or Firm:
Tamio Nishiwaki