Optical scanning system and method for setting curvature of fiel

Details Optical scanning system and method for setting curvature of fiel Optical scanning system and method for setting curvature of fiel

1996-03-22

1998-10-20

Reinhart, Mark J.

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

B41J 247

Patent

active

058254030

ABSTRACT:
An optical scanning system in which light emitted from a light source is deflected by a deflector and converged onto a surface to be scanned by an optical image forming system. The optical image forming system has a curvature of field in a sub-scanning direction to cancel a change in a beam spot diameter caused by a change in an F-number in the sub-scanning direction, depending on an image height in the main scanning direction. The invention is also addressed to a method for determining a curvature of field in the optical scanning system.

REFERENCES:
patent: 4941719 (1990-07-01), Hisada et al.
patent: 5233457 (1993-08-01), Hamada et al.

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