Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1996-11-08
1997-12-30
Nelms, David C.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369119, 369121, 369 4437, 347242, G03G 1504, G11B 700
Patent
active
057038600
ABSTRACT:
An optical beam recording device for performing image recording by focusing a plurality of light beams modulated according to an image signal through a focusing optical system onto a photosensitive member, including a light source having a plurality of arrayed light emitting portions for emitting the plurality of light beams; a light detecting device located at a given position for detecting a detecting light beam of the plurality of light beams; and a control device for controlling a focused condition of the plurality of light beams on the photosensitive drum according to a result of detection of the detecting light beam by the light detecting device. With this arrangement, shift of a focal position can be detected with high accuracy without increasing a response speed of the light detecting device and inviting the complication of configuration.
REFERENCES:
patent: 4476474 (1984-10-01), Kitamura
patent: 4506275 (1985-03-01), Maeda
patent: 4520472 (1985-05-01), Reno
patent: 4818886 (1989-04-01), Drucker
patent: 5122658 (1992-06-01), Ando
Fukunaga Hideki
Nomiyama Takashi
Yamaguchi Shoji
Chu Kim-Kwok
Fuji 'Xerox Co., Ltd.
Nelms David C.
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