Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1984-07-13
1987-11-17
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358285, 358293, 382 59, H04N 1024
Patent
active
047077476
ABSTRACT:
A hand held scanning device (20) has a sensing unit (26) consisting of a first linear array (30) of light emitting diodes (LEDs) (32) spaced from and parallel to a second linear array (34) of photosensitive element integrated circuits (36). The LEDs (32) and integrated circuits (36) are mounted on a common substrate (60) facing opening (29) in bottom surface (24) of housing (22). A roller (28) is parallel to the sensing unit (26). A wheel (82) containing light and dark areas is positioned to be rotated by the roller (28). The roller (28) assures that the scanning device (20) travels in a straight line path when it is moved along a sheet of paper. The light and dark areas of the wheel (82) are sensed to define line scans of the device (20) and uniform light exposure by the LEDs (32) on the basis of distance travelled along the sheet of paper. A light collimating fiber optic plate (67) is positioned over each integrated circuit (36).
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D. W. Baxter "Scanner Using Linear Array of LED" IBM Technical Discl. Bulletin, vol. 15, No. 1, 6-72.
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