Multiple mode raster scanner

Details Multiple mode raster scanner Multiple mode raster scanner

1979-10-12

1985-03-19

Orsino, Jr., Joseph A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, 358287, 358294, H04N 140

Patent

active

045063010

ABSTRACT:
An image input terminal (IIT) with automatic document handler for feeding documents to be scanned into registered position on the IIT platen. The IIT includes a pair of multi-element scanning arrays with cooperating scan lamp and optics on a movable carriage disposed in scanning relationship with the platen. Analog image signals generated by the scanning arrays are initially processed in separate channels and then combined into a serial stream. The stream of analog image signals may optionally be thresholded or screened to provide binary level image signals or converted to multi-bit gray scale. A control system including microprocessor provides timing and control signals for synchronizing operation of the scanning carriage, document handler, and image signal reading and processing together with electronic crossover between arrays to avoid loss of data, automatic signal gain and deletion of bad image signals or pixels. On board array alignment apparatus permits adjustment of array focus, skew, height, position and overlap.

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Gruodis et al-Limited Resolution Facsimile System-IBM Tech. Disclosure Bulletin-vol. 6, #40, Sep. 1963, pp. 139-141.

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