OPTICAL SCANNING DEVICE AND METHOD OF CONTROL THEREFOR

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:

PCT/JP2018/046305

Publication Date:

September 19, 2019

Filing Date:

December 17, 2018

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

G02B26/10; B81B3/00; B81B7/04; G01S7/481; G01S17/86; G01S17/931; G02B26/08

Domestic Patent References:

WO2016153687A1

2016-09-29

Foreign References:

JP2015090463A	2015-05-11
JP2000075030A	2000-03-14
JPH11153664A	1999-06-08
US20170307736A1	2017-10-26
JP2016090268A	2016-05-23

Other References: