Title:
検出装置
Document Type and Number:
Japanese Patent JP6977355
Kind Code:
B2
Abstract:
To provide a detector capable of suppressing influences of external light despite having a simple configuration.SOLUTION: A detector 1 includes a laser light source part 2 for emitting a laser beam, and a diffraction optical element 10 for shaping and emitting the laser beam emitted by the laser light source part 2. The laser light source part 2 emits a laser beam with polarization components aligned. A polarizer 30 is arranged on a position where light entering a light receiving part 3 passes. The polarizer 30 blocks most of external light such as sunlight, therefore the light receiving part 3 can be less susceptive to the external light.SELECTED DRAWING: Figure 1
Inventors:
Koichi Kinoshita
Hiroshi Sekiguchi
Hiroshi Sekiguchi
Application Number:
JP2017140860A
Publication Date:
December 08, 2021
Filing Date:
July 20, 2017
Export Citation:
Assignee:
Dai Nippon Printing Co.,Ltd.
International Classes:
G02B5/18; G02B5/30; H04N5/225
Domestic Patent References:
| JP2015194884A | ||||
| JP200733560A | ||||
| JP10211176A | ||||
| JP200883010A | ||||
| JP651073A | ||||
| JP201398817A | ||||
| JP200953574A | ||||
| JP201767940A |
Foreign References:
| WO2017119400A1 |
Attorney, Agent or Firm:
Masayuki Masabayashi
Tetsuo Shiba
Hayashi Ichiyoshi
Tetsuo Shiba
Hayashi Ichiyoshi
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