Adapter for scanning transparencies with a reflective document s

Details Adapter for scanning transparencies with a reflective document s Adapter for scanning transparencies with a reflective document s

1994-11-22

1995-10-31

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

358475, 353 25, 356444, H01J 314, H04N 140

Patent

active

054632170

ABSTRACT:
A completely passive adapter for scanning transparent images in a reflective scanner. Mirrors are used to capture light from a lamp that is internal to the scanner and to reflect that light thought a transparent image along the light path required by internal scanner optics. For larger images, a lens is added to capture additional light. Different embodiments of the adapter accommodate variation in angles of optical paths and offset between the light source path and the light detection path. Embodiments are provided having two tilted mirrors, two mirrors plus an optical wedge, four mirrors, and seven mirrors. An optional graduated density optical filter may be added to compensate for nonuniform illumination.

REFERENCES:
patent: 4481414 (1984-11-01), Gasper
patent: 4564290 (1986-01-01), Bell et al.
patent: 5202774 (1993-04-01), Ishimitsu

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