Optical image scanner with variable focus

Details Optical image scanner with variable focus Optical image scanner with variable focus

2005-09-06

2005-09-06

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C358S474000, C358S497000

Reexamination Certificate

active

06940063

ABSTRACT:
A scanner has an optical head that includes lenses and a photosensor array. The distance of the optical head, relative to a surface of a platen, is variable. As a result, the primary focal point for the lenses can be moved relative to a surface of the platen. The primary focal point can be continuously variable, or the primary focal point can be selected from one of multiple alternative primary focal points.

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