Title:
DEFLECTION SCANNING DEVICE
Document Type and Number:
Japanese Patent JPH04362914
Kind Code:
A
Abstract:
PURPOSE:To reduce a noise, vibrations, and an irregularity in rotation due to interference between air turbulence generated by the rotation of a rotary polygon mirror, and a protection cover and mass unbalance. CONSTITUTION:The generation of the air turbulence and the unbalance of mass are reduced by making the reflecting plane part 23b of the rotary polygon mirror 23, installed in the protection cover 19 which has a laser beam incidence/ projection opening part (window) 20, thinner than the columnar center part 23a.
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| JPH0364726 | LIGHT BEAM SCANNING OPTICAL SYSTEM |
Inventors:
HONMA YOSHIFUMI
TERAJIMA ISAMU
TERAJIMA ISAMU
Application Number:
JP23787891A
Publication Date:
December 15, 1992
Filing Date:
September 18, 1991
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G02B26/12; G02B26/10; H04N1/04; H04N1/113; (IPC1-7): G02B26/10; H04N1/04
Domestic Patent References:
| JPS59142515U | 1984-09-22 | |||
| JPS59123821U | 1984-08-21 | |||
| JPS565114U | 1981-01-17 | |||
| JPS608926U | 1985-01-22 |
Attorney, Agent or Firm:
Katsuo Ogawa