Title:
光ビーム走査ユニット及び画像形成装置
Document Type and Number:
Japanese Patent JP4187672
Kind Code:
B2
Abstract:
The temperature difference between an internal temperature and an external temperature which are detected by an internal temperature sensor and an external temperature sensor, respectively, is calculated. If the internal temperature is lower by not less than predetermined degrees than the external temperature and, hence, condensation on the surface of each optical component within a laser writing unit is highly likely, a motor is driven to rotate a polygonal mirror. During its operation the motor generates heat, which in turn transfers from a flange portion directly to a housing while heating air around the laser writing unit. Further, air within the housing is stirred by rotation of the polygonal mirror. In this way the temperature of the entire laser writing unit is raised.
Inventors:
Masaki Saka
Application Number:
JP2004062441A
Publication Date:
November 26, 2008
Filing Date:
March 05, 2004
Export Citation:
Assignee:
Sharp Corporation
International Classes:
B41J2/44; G02B26/12; G02B26/10; G03G15/00; G03G15/04; G03G21/00; G03G21/20; H01J3/14; H04N1/036; H04N1/113
Domestic Patent References:
| JP11184356A | ||||
| JP10142545A |
Attorney, Agent or Firm:
Hisao Komori
Toshio Ozawa
Toshio Ozawa