Title:
LIGHT DETECTION METHOD, LIGHT DETECTION DEVICE, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2018/131700
Kind Code:
A1
Abstract:
The purpose of the present invention is to stably obtain the beam diameter and the optical axis, even for a light beam having a non-uniform intensity distribution. A contour of a cross section of a light beam is obtained in a light intensity range in which a specific ratio with respect to the total light intensity is achieved. An approximate circle is obtained from the contour. The approximate circle is calculated using the method of least squares or the like. The optical axis and/or the beam diameter of the light beam is obtained on the basis of the approximate circle.
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Inventors:
MORITA HIROSHI (JP)
TOBA KAZUAKI (JP)
YAMAMOTO MASANARI (JP)
UEDA KENJIRO (JP)
TAKAHASHI RYOHEI (JP)
TOBA KAZUAKI (JP)
YAMAMOTO MASANARI (JP)
UEDA KENJIRO (JP)
TAKAHASHI RYOHEI (JP)
Application Number:
PCT/JP2018/000761
Publication Date:
July 19, 2018
Filing Date:
January 15, 2018
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
G01B11/00; G01B11/08
Foreign References:
| JPH10267753A | 1998-10-09 | |||
| JPS542175A | 1979-01-09 | |||
| JP2012003528A | 2012-01-05 | |||
| JP2008020290A | 2008-01-31 | |||
| JP2010127668A | 2010-06-10 | |||
| JP2015191132A | 2015-11-02 | |||
| JPH06259783A | 1994-09-16 | |||
| US5606588A | 1997-02-25 | |||
| JP2001166202A | 2001-06-22 |
Other References:
See also references of EP 3569975A4
Attorney, Agent or Firm:
MIYATA, Masaaki et al. (JP)
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