Optical scanning apparatus, method of controlling amount of...

Details Optical scanning apparatus, method of controlling amount of... Optical scanning apparatus, method of controlling amount of...

2008-04-24

2009-11-24

Pham, Hai C (Department: 2861)

Incremental printing of symbolic information

Light or beam marking apparatus or processes

Scan of light

C347S247000

Reexamination Certificate

active

07623148

ABSTRACT:
An optical scanning apparatus includes an approximation formula determination unit, a sensitivity correction value determination unit and a bias current controller. The approximation formula determination unit determines an nth-order approximation formula and an mth-order approximation formula, which represent the sensitivity characteristic of the image carrier along the main-scanning direction thereof, from sensitivity data representing the sensitivity of each area obtained by dividing the surface of the image carrier into a plurality of areas. The sensitivity correction value determination unit determines a sensitivity correction value, which is a correction value of sensitivity in each area, from the nth-order approximation formula and mth-order approximation formula. The bias current controller controls a bias current in accordance with the sensitivity correction value. A switching current controller controls a switching current in accordance with the sensitivity correction value and a current value that is for obtaining a target amount of light.

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