Digital Techniques In High Resolution Analog Scanning And Recording

Heino Ristlaid Dest Data Corporation

doi:10.1117/12.954915

10 January 1977 Digital Techniques In High Resolution Analog Scanning And Recording

Heino Ristlaid Dest Data Corporation

Proceedings Volume 0084, Laser Scanning Components and Techniques: Design Considerations/Trends; (1977) https://doi.org/10.1117/12.954915
Event: 20th Annual Technical Symposium, 1976, San Diego, United States

Abstract

A flat bed laser plate-maker system is being developed for Dow Jones and Company, publishers of the Wall Street Journal, to scan paste-ups and proofs and to reproduce the scanned information remotely on film or plates. Throughput of about one minute per plate is achieved. Presently, the fastest and most advanced way for producing newspaper printing plates is by preparing paste-ups and photographing each fully assembled page. Moreover, when transmission to a remote location is needed, telefax or more simply, "fax" transmission is used. Now, a flat bed laser plate-making system can eliminate the initial photographic step, improve the operational steps and, at the same time, speed up the whole process. In the laser system, the paste-up is scanned directly (without the photographic step) by a recently demonstrated flat field scanning system. Photomultiplier tubes change the reflected laser energy to an electrical signal which is digitized and transmitted to a second laser system, much like the first, where a second laser beam exposes a sensitive sheet of film or a coated plate to form the received image with great detail and quality. Most of the data processing takes place in digital domain. Scanning, transmission and recording take place in less time than is presently needed for fax operation alone.

Citation Download Citation

Heino Ristlaid Dest Data Corporation "Digital Techniques In High Resolution Analog Scanning And Recording", Proc. SPIE 0084, Laser Scanning Components and Techniques: Design Considerations/Trends, (10 January 1977); https://doi.org/10.1117/12.954915

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KEYWORDS

Scanners

Laser scanners

Clocks

Logic

Data communications

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Analog electronics

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