Direct imaging apparatus for an electronic document transmitter

Details Direct imaging apparatus for an electronic document transmitter Direct imaging apparatus for an electronic document transmitter

1977-10-11

1979-04-10

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 104

Patent

active

041491971

ABSTRACT:
Instead of imaging a line across a document by a lens system on to an imager, direct imaging is obtained by positioning the document in close proximity to but spaced a predetermined distance from a linear array of photo-detectors and illuminating the document by light from beneath the detectors, the light passing through spaces between detectors and being reflected back to the detectors. To prevent saturation of the dectectors by light direct from the illuminating means, opaque material is positioned beneath the detectors with gaps or apertures through which light can illuminate the document. The detectors can be spaced close together to give desired resolution, or spaced a predetermined distance apart and the detector head stepped laterally. More than one line of detectors can be provided.

REFERENCES:
patent: 3544713 (1970-12-01), Case et al.
IBM Technical Disclosure Bulletin, vol. 15, No. 1, Jun. 1972.

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