Optical document scanning method and apparatus with adjustable s

Details Optical document scanning method and apparatus with adjustable s Optical document scanning method and apparatus with adjustable s

1998-01-09

1999-10-26

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

358474, 355 55, G02B 2608

Patent

active

059738146

ABSTRACT:
An optical document scanning method and apparatus having a driving system which drives each of the lens groups collectively forming the optical scanning apparatus in an optical axis direction to lens positions corresponding to a given designed-scanning magnification; and a detecting system which detects the actual scanning magnification of the optical scanning system at the lens positions corresponding to the given designed-scanning magnification, whereby to substantially match the actual scanning magnification to the given designed-scanning magnification, the driving system drives each of the lens groups in the optical axis direction by a given amount corresponding to any difference between the actual scanning magnification and the given designed-scanning magnification.

REFERENCES:
patent: 4531831 (1985-07-01), Kitajima et al.
patent: 4922087 (1990-05-01), Nakajima et al.
patent: 5048106 (1991-09-01), Nakajima et al.
patent: 5585937 (1996-12-01), Kokubo et al.

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