Digital scanning system having drop-out capabilities and a color

Details Digital scanning system having drop-out capabilities and a color Digital scanning system having drop-out capabilities and a color

1997-03-31

1998-06-30

Le, Que

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502081, 382163, 358515, 399178, G01J 350

Patent

active

057738181

ABSTRACT:
A monochromatic scanning system includes an illumination system, a document staging system, an optical lens system, a photosensing system to convert light to electrical signals and a color drop-out filter. The illumination system illuminates an original image to be scanned in the document staging system and the optical lens system directs light reflected from the original image to be scanned onto the photosensing system. The color drop-out filter is located in an optical path between the original image to be scanned and the photosensing system such that the color drop-out filter allows a predetermined range of wavelengths to pass therethrough and a range of wavelengths associated with infrared radiation to pass therethrough. this enables the monochromatic scanning system to have drop-out capability by merely substituting the color drop-out filter without further modifications to the scanning system.

REFERENCES:
patent: 3775006 (1973-11-01), Hartman et al.

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