Focusing module

Details Focusing module Focusing module

2007-01-23

2007-01-23

Cherry, Euncha P. (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

Reexamination Certificate

active

11007240

ABSTRACT:
A focusing module for scanners includes a body which holds a lens and a transmission device on one side thereof to move the lens linearly and adjust a desired scanning focal length. Therefore the diaphragm may be enlarged to increase the scanning speed without reducing the depth of field and dropping Modulation Transfer Function, and to achieve a faster scanning speed and a desired scanning quality.

REFERENCES:
patent: 5210648 (1993-05-01), Bedzyk
patent: 5583686 (1996-12-01), Chen
patent: 6476955 (2002-11-01), Yoshida

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