Focus adjusting system of an optical scanner

Details Focus adjusting system of an optical scanner Focus adjusting system of an optical scanner

1998-03-02

2000-12-05

Lee, Cheukfan

Facsimile and static presentation processing

Facsimile

Picture signal generator

H04N 104

Patent

active

061574686

ABSTRACT:
A focus adjusting system of an optical scanner which comprises an optical scanning module having a focus for scanning line images of a document line by line and converting each of the line images into a digital image signal set, and a scanning driver for driving the scanning module back and forth so as to scan the document. The focus adjusting system comprises a focus driver for adjusting the focus of the scanning module, and a focus controller for controlling the focus driver according to the digital image signal sets generated by the scanning module at various foci over a line position of the document so as to adjust the focus of the scanning module.

REFERENCES:
patent: Re31370 (1983-09-01), Mashimo et al.
patent: 5532846 (1996-07-01), Brook et al.
patent: 5767989 (1998-06-01), Sakaguchi

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