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Proceedings Paper

Digital Techniques In High Resolution Analog Scanning And Recording
Author(s): Heino Ristlaid Dest Data Corporation
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Paper 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.

Paper Details

Date Published: 10 January 1977
PDF: 7 pages
Proc. SPIE 0084, Laser Scanning Components and Techniques: Design Considerations/Trends, (10 January 1977); doi: 10.1117/12.954915
Show Author Affiliations
Heino Ristlaid Dest Data Corporation, Dest Data Corporation (United States)

Published in SPIE Proceedings Vol. 0084:
Laser Scanning Components and Techniques: Design Considerations/Trends
Leo Beiser; Gerald F. Marshall, Editor(s)

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