Digital method image forming apparatus and image forming method

Details Digital method image forming apparatus and image forming method Digital method image forming apparatus and image forming method

1995-06-07

1996-10-01

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358300, 347134, 347259, 347261, H04N 123

Patent

active

055617433

ABSTRACT:
A copying machine for forming an image by scanning a laser beam which is emitted from an optical system on a photosensitive member. Photosensors are provided at optically equivalent positions to a beginning portion and an end portion of a scanning line on a photosensitive member. A scanning time of a laser beam in the main scanning direction is measured by these photosensors. The measured time and a standard time for a copy magnification set by an operator are compared, and a correction value is calculated, and at the same time, magnification in the main scanning direction is corrected using the correcting value. Also, focusing (adjusting of the beam diameter) is carried out using the photosensors. Each of the photosensors contains a photoelectric transfer element, and a beam which comes through a slit is incident to the element. Each photosensor is provided with two slits. One is perpendicular to the main scanning direction, and the other is inclined to the main scanning direction. The beam diameter in the main scanning direction is adjusted based on detection of the beam which comes through the slit which is perpendicular to the main scanning direction. The beam diameter in the sub scanning direction is adjusted based on detection of the beam which comes through the slit inclined to the main scanning direction.

REFERENCES:
patent: 4888650 (1989-12-01), Abuyama
patent: 5064260 (1991-11-01), Shiraishi
patent: 5130839 (1992-07-01), Tomita
patent: 5233455 (1993-08-01), Yamaguchi et al.
patent: 5309205 (1994-05-01), Hayano
patent: 5412510 (1995-05-01), Iizuka et al.

Affiliated with

Also associated with

Rating

Digital method image forming apparatus and image forming method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital method image forming apparatus and image forming method , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital method image forming apparatus and image forming method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1508479