Title:
OPTICAL SCANNER
Document Type and Number:
Japanese Patent JP3245243
Kind Code:
B2
Abstract:
PURPOSE: To keep the scanning start position on a medium to be scanned constant, and to reduce an unmagnification error and variable magnification error when a scanning speed fluctuates due to the change of an environment.
CONSTITUTION: This device is equipped with a deflector 3 which deflects a beam of light irradiated from a light source 1, and a synchronization detector 9 which receives light beam 8 for detecting synchronization deflected by the deflector 3, and an exposure distribution corresponding to a picture signal is formed on the medium to be scanned synchronously with a prescribed clock by the detection signal of the synchronization detector 9. Also, the device is equipped with a scanning speed detecting means which detects the change of the scanning speed based on the change of receiving time of the synchronization detector 9, and a clock control means which changes the clock based on the detected result of the scanning speed detecting means.
Inventors:
Takeshi Yamakawa
Application Number:
JP1160493A
Publication Date:
January 07, 2002
Filing Date:
January 27, 1993
Export Citation:
Assignee:
株式会社リコー
International Classes:
G02B26/10; B41J2/44; G02B26/12; G03G15/04; G03G15/043; H04N1/04; H04N1/113; (IPC1-7): H04N1/113; B41J2/44; G02B26/10; G03G15/04; G03G15/043
Domestic Patent References:
| JP6130312A | ||||
| JP5449147A |
Attorney, Agent or Firm:
Akira Kashiwagi (1 person outside)