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Title:
OPTICAL SCANNING DEVICE AND METHOD OF CONTROL THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/176204
Kind Code:
A1
Abstract:
The present invention provides an optical scanning device 100 capable of maintaining a fixed spatial resolution even when the scanning range is variable. The optical scanning device 100 comprises: a light source 101 for emitting light; a scanning mirror 106 for reflecting light entering from the light source on the reflection surface thereof, the scanning mirror 106 being capable of creating mutually independent oscillations about a first axis passing through the reflection surface and a second axis perpendicular to the first axis and passing through the reflection surface; and a control unit 103 for scanning the light reflected by the reflection surface of the scanning mirror 106 by controlling a first frequency and a first amplitude of the oscillation about the first axis of the scanning mirror 106 and a second frequency and a second amplitude of the oscillation about the second axis. The control unit 103 controls the second frequency on the basis of the maximum scanning angle along a sub-scanning direction.

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Inventors:
ITO TAKAHIKO (JP)
KONNO NOBUAKI (JP)
HIRATA YOSHIAKI (JP)
Application Number:
JP2018/046305
Publication Date:
September 19, 2019
Filing Date:
December 17, 2018
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (Postcode1008310, JP)
International Classes:
G02B26/10; B81B3/00; B81B7/04; G01S7/481; G01S17/93; G02B26/08
Domestic Patent References:
WO2016153687A12016-09-29
Foreign References:
JP2015090463A2015-05-11
JP2000075030A2000-03-14
JPH11153664A1999-06-08
US20170307736A12017-10-26
Attorney, Agent or Firm:
YAMAO, Norihito et al. (AOYAMA & PARTNERS, Umeda Hankyu Bldg. Office Tower 8-1, Kakuda-cho, Kita-ku, Osaka-sh, Osaka 17, 〒5300017, JP)
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