Title:
LASER RADAR DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/008393
Kind Code:
A1
Abstract:
According to the present invention, even if an azimuth angle synchronized to laser light scanning on each reflecting surface of a polygon mirror differs as a result of variations in the speed of rotation during one rotation, distance image data in which said differences are rectified can be generated. This laser radar device is provided with a rotation detecting means (boss S and photo-interrupter 3) which detects the rotational phase of a polygon mirror (P) at a plurality of detecting locations in a circumferential direction, and a correcting means (FPGA 11) which corrects distance image data on the basis of the detection results from the rotation detecting means, wherein the correcting means effects correction in such a way as to reduce a mutual discrepancy in an azimuth angle around an axis of rotation between data in a range scanned using one reflecting surface and data in a range scanned using another reflecting surface. The number of provided detecting locations is an integral multiple of the number of reflecting surfaces that are arranged in the circumferential direction of the polygon mirror. A sector time period from detection at one detecting location to detection at the next detecting location is measured, and the correction amount is determined in accordance with the length of the sector time period.
Inventors:
NOMURA SHUNSUKE (JP)
IDE YOSHINORI (JP)
IDE YOSHINORI (JP)
Application Number:
PCT/JP2017/022770
Publication Date:
January 11, 2018
Filing Date:
June 21, 2017
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G01S7/497; G01S17/18; G01S17/89; G02B26/10; G02B26/12
Foreign References:
| JP2016070974A | 2016-05-09 | |||
| JPH09274076A | 1997-10-21 | |||
| JP2003262649A | 2003-09-19 | |||
| JP2001208846A | 2001-08-03 | |||
| JPH08248131A | 1996-09-27 | |||
| JP2007079059A | 2007-03-29 | |||
| JP2016009002A | 2016-01-18 | |||
| US20100052969A1 | 2010-03-04 |
Other References:
See also references of EP 3483628A4
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
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