Integrated input/output scanner for electronic document processi

Details Integrated input/output scanner for electronic document processi Integrated input/output scanner for electronic document processi

1981-10-05

1984-03-20

Faber, Alan

Facsimile and static presentation processing

Facsimile

Recording apparatus

358293, 346160, H04N 122

Patent

active

044384610

ABSTRACT:
An integrated input/output scanner for electronic document processing and similar application comprises a photodetector array and an array of individually addressable electrodes which are supported on a suitable substrate, such as a silicon integrated circuit, and held closely adjacent a longitudinal surface of an optically transparent electro-optic element. For output scanning, a sheet-like light beam is transmitted through the electro-optic element in a generally longitudinal direction and is spatially modulated in accordance with data applied to the electrodes. Readout optics convert the spatial phase front or polarization modulation of the light beam into a correspondingly modulated intensity profile to expose a recording medium. On the other hand, for input scanning, a subject copy is imaged onto the photodetector array via the electro-optic element. The input imaging axis is selected to avoid any significant mixing between the input image and the output scanning beam so that there is little, if any, interference between the input scanning and output scanning functions. Moreover, if the input imaging is performed via the electro-optic element, the input imaging axis is aligned to be substantially normal to the intervening surfaces of the electro-optic element to avoid unwanted distortion of the image detected by the photodetector array.

REFERENCES:
patent: 4241990 (1980-12-01), Fisli
patent: 4281904 (1981-08-01), Sprague
patent: 4356347 (1982-10-01), Wiener
patent: 4367925 (1983-01-01), Sprague
patent: 4374617 (1983-02-01), Fisli
"Polarizing Filters Plot Analog Waveforms", Machine Design, vol. 51, No. 17, 7/26/79, p. 62.
"Data Recorder Eliminates Problem of Linearity", Design News, 2/4/80, pp. 56-57.
"Light Gates Give Data Recoder Improved Hardcopy Resolution", Electronic Design, 7/19/79, pp. 31-32.

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