Title:
OPTICAL DEFLECTOR
Document Type and Number:
Japanese Patent JPH03196113
Kind Code:
A
Abstract:
PURPOSE:To improve the quality of an image by providing an index magnet in a position opposed to the stator of a motor of the rotor of the motor, and also, providing a Hall element on a printed board so as to face the index magnet. CONSTITUTION:An index magnet 3a is provided in a position opposed to the stator 4 of a motor of the rotor 2 of the motor for driving to rotate a polygon mirror 1, and also, a Hall element 3b is provided on a printed board 12 so as to be opposed to the index magnet 3a. Accordingly, when an optical deflector is executing a rotational operation, as the rotor rotates, the index magnet provided on the rotor and the Hall element 3b provided on the printed board come to face each other, or a reflecting plate provided on the rotor and a photointerrupter provided on the printed board come to face each other, and an output signal from a position detector can be obtained once per one rotation. In such a way, the image of a good quality is obtained easily.
Inventors:
KIKUCHI HIROSHI
UCHIDA MASATO
UCHIDA MASATO
Application Number:
JP33767589A
Publication Date:
August 27, 1991
Filing Date:
December 26, 1989
Export Citation:
Assignee:
COPAL ELECTRONICS
International Classes:
G02B5/08; G02B26/10; G02B26/12; (IPC1-7): G02B5/08; G02B26/10
Domestic Patent References:
| JPS63316820A | 1988-12-26 | |||
| JPS59151124A | 1984-08-29 |
Attorney, Agent or Firm:
Kobayashi