Title:
LASER BEAM IRRADIATION DETECTION DEVICE, LASER BEAM IRRADIATION DETECTION METHOD, AND LASER BEAM IRRADIATION DETECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/163489
Kind Code:
A1
Abstract:
According to the present invention, a bandpass filter (3a-3c) is configured to allow passing therethrough of a light beam in a prescribed band including a wavelength band of the color of a laser beam to be detected, from among light beams coming from a photographic subject. An imaging unit of a video camera (2a-2c) images the light beam passing through the bandpass filter (3a-3c). A control unit (4a-4c) analyzes the incidence, for each luminance level, of a video signal generated on the basis of an imaging signal outputted from the imaging unit and detects a peak where the luminance number juts out at a specific luminance level. The control unit (4a-4c) detects a linear trace of a light beam within a frame of the video signal. When a peak is present at a specific luminance level and a trace of a light beam is present within the frame, the control unit (4a-4c) detects that a laser beam has been irradiated.
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Inventors:
YUFUNE SHUTA (JP)
HIRATA TAKUYA (JP)
IGARASHI TAKESHI (JP)
HIRATA TAKUYA (JP)
IGARASHI TAKESHI (JP)
Application Number:
PCT/JP2017/036300
Publication Date:
September 13, 2018
Filing Date:
October 05, 2017
Export Citation:
Assignee:
JVC KENWOOD CORP (JP)
International Classes:
G01D21/00; H01S3/00
Foreign References:
| JP2000101177A | 2000-04-07 | |||
| JP2011165732A | 2011-08-25 | |||
| JP2004054105A | 2004-02-19 | |||
| JP2017041441A | 2017-02-23 |
Other References:
See also references of EP 3594633A4
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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