Exposing device for correcting an f.theta. error of a rotatable

Details Exposing device for correcting an f.theta. error of a rotatable Exposing device for correcting an f.theta. error of a rotatable

1994-11-08

1999-10-05

Fuller, Benjamin R.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

347261, B41J 247, B41J 1534, G01D 1514, G02B 2600

Patent

active

059632437

ABSTRACT:
An exposing device is composed of a photosensitive drum having a surface partitioned into a plurality of exposure areas in a main scanning direction, for carrying an image formed by exposing the surface, a laser light source for emitting a laser beam, a polygon mirror for rotating at a constant speed to scan the surface of the photosensitive drum in the main scanning direction with the laser beam from the laser light source, and an exposure control circuit for producing items of emission data for one line while the number of emission data items for one dot is varied for each exposure area, and for supplying the emission data items for one line to the laser light source in response to a print clock pulse. Particularly, the exposure control circuit includes a CPU for multiplying a reference value for the number of data items which should be selected from emission data items for a dot and changed in value to obtain a predetermined function, by a coefficient for an exposure area to which the emission data items for the dot are assigned, and for changing the value of each data item selected from the emission data items for the dot in number corresponding to a result of multiplication.

REFERENCES:
patent: 4847641 (1989-07-01), Tung
patent: 4853710 (1989-08-01), Shimada et al.
patent: 5029108 (1991-07-01), Lung
patent: 5309177 (1994-05-01), Shoji et al.

Affiliated with

Also associated with

Rating

Exposing device for correcting an f.theta. error of a rotatable does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Exposing device for correcting an f.theta. error of a rotatable , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exposing device for correcting an f.theta. error of a rotatable will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1177378