Title:
POSITION DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/113463
Kind Code:
A1
Abstract:
In the present invention, a first voice coil motor (10) comprises: a first magnet (11) fixed to an optical reflecting element (2); and a first coil (12) fixedly disposed so as to oppose the first magnet (11). The optical reflecting element (2) is rotated about a first axis of rotation (A). A second voice coil motor comprises: a second magnet fixed to the optical reflecting element (2); and a second coil fixedly disposed so as to oppose the second magnet. The optical reflecting element (2) is rotated about a second axis of rotation. A first magnetic sensor (40) is fixed within a region facing the first magnet (11), and can detect a first magnetic field applied from the first magnet (11) which moves when the optical reflecting element (2) rotates about the second axis of rotation (B). A second magnetic sensor is fixed within a region facing the second magnet, and can detect a second magnetic field applied from the second magnet which moves when the optical reflecting element (2) rotates about the first axis of rotation (A).
Inventors:
NAKAMURA DAISUKE (JP)
Application Number:
PCT/JP2021/032324
Publication Date:
June 02, 2022
Filing Date:
September 02, 2021
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
G01B7/30; G03B5/00
Domestic Patent References:
| WO2017110341A1 | 2017-06-29 |
Foreign References:
| US20200218082A1 | 2020-07-09 | |||
| JP2015011353A | 2015-01-19 | |||
| JP2013174605A | 2013-09-05 | |||
| CN111698408A | 2020-09-22 |
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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