A New Instrument for Angling Contact Screens.

Details

Document ID: 
620119
Author(s): 
R. E. Maurer, J. A. C. Yule
Year: 
1962
Pages: 
7

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$15.00
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$30.00

Abstract

A simple and accurate Indicator is described for angling and cutting contact screens. The Indicator generates moirepatterns when a screen of like ruling is placed over the Indicator. These patterns are used to obtain an accuracy of +0.1 degree in angling the contact screen. The need for this accuracy is explained, as well as other theoretical considerations of the screen patterns produced in a four-color reproduction.

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