Control apparatus and method for image-forming system

Details Control apparatus and method for image-forming system Control apparatus and method for image-forming system

1991-10-09

1993-10-26

Fuller, Benjamin R.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

346108, 346 11, 346157, G01D 1514

Patent

active

052570479

ABSTRACT:
In an image-forming system where a photosensitive belt is exposed to and scanned with a laser beam to form an image on the surface of the photosensitive belt, a standard pattern having laser beam-transmitting portions and non-transmitting portions arranged alternately in the direction of main scanning of the laser beam is formed on the photosensitive belt, and light-detecting means is disposed to detect the intensity of the laser beam transmitted through the transmitting portions. Dislocation of the focal point of the laser beam is detected based on the difference of the detected beam intensity between the transmitting portions and the non-transmitting portions, and based on the result of this detection, a collimator lens is moved in the direction of the optical axis to correct the dislocation of the focal point.

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patent: 4990771 (1991-02-01), Minoura et al.
patent: 5081477 (1992-01-01), Gibson

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