Method and apparatus for positioning a focusing lens

Details Method and apparatus for positioning a focusing lens Method and apparatus for positioning a focusing lens

1996-02-26

1997-04-15

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

358494, 358497, G02B 2608

Patent

active

056215630

ABSTRACT:
A scanning apparatus providing separate fixed focal planes for transmissive and reflective original documents to be scanned, wherein a scan carriage containing illumination, sensor, and optical elements is moved together to scan an original document and to obtain a digitized representation thereof. The movable scan carriage has an illumination source disposed between the reflective and transmissive object focal planes, with the object focal plane to be used selected by changing the position of one or more optical elements within the scan carriage. The resolution of the digitized representation of the scanned original document can be determined by rotation of at least one lens about an axis substantially perpendicular to its optic axis.

REFERENCES:
patent: 3752558 (1973-08-01), Lloyd
patent: 5532846 (1996-07-01), Brook et al.
patent: 5535040 (1996-07-01), Ohtsuka

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