Optical scanning apparatus for scanning laser beam on imaging su

Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light

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347247, H04N 121

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active

055483216

ABSTRACT:
Dot width data of a plurality patterns each corresponding to a recording range in one scanning operation are stored in a memory in advance. Each dot width data required to correct an f-.theta. error is used to determine each dot width in one scanning operation. In accordance with the operation of an address counter, a bus switching circuit selectively reads out dot width data of a pattern different from a preceding pattern from the memory for each scanning operation, and outputs the data to a latch circuit. A programmable counter determines each dot width of image data on the basis of the dot width data from the latch circuit. A laser diode driver ON/OFF-controls a laser beam from a laser diode on the basis of the image data from the programmable counter.

REFERENCES:
patent: 4410234 (1983-10-01), Mikami et al.
patent: 4717925 (1988-01-01), Shibata et al.
patent: 4803367 (1989-02-01), Murase et al.
patent: 4962981 (1990-10-01), Murakami et al.
patent: 4975626 (1990-12-01), Yagi et al.

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