Exposure device having means for correcting intensity of laser b

Details Exposure device having means for correcting intensity of laser b Exposure device having means for correcting intensity of laser b

1991-10-08

1994-05-10

Reinhart, Mark J.

Recorders

Printing, dotting, or punching marker

Ink transfer support or moving means

H04N 121

Patent

active

053112164

ABSTRACT:
In an image recording apparatus including a rotary drum on which a photosensitive sheet is wound, the drum is rotated by a motor through a speed reduction gear assembly to rotate at a constant speed V. To maintain an average exposure amount applied to the photosensitive sheet at constant as it is not the case when the rotational or peripheral speed of the drum vary due to a backlash of the speed reduction gears or a load imposed on the drum, a speed detector is attached to the shaft of the drum to detect the rotational speed of the drum. Based on the detected rotational speed, the exposure amount is increased or decreased by .DELTA.V/V times as much as the average exposure amount where V is a regular rotational speed of the drum and .DELTA.V is a variation in the drum speed from the speed V.

REFERENCES:
patent: 4698649 (1987-10-01), Lee
patent: 4835545 (1989-05-01), Mager et al.
patent: 5142304 (1992-08-01), Sato et al.

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