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Proceedings Paper

Visual Circular Variable Filters
Author(s): Dennis Kitchens
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Paper Abstract

The visual circular variable filter (VCVF) is introduced. A typical filter is described with layer thickness that varies linearly along a circular path. Typical spectral results are presented. Bandwidths of 10 to 50 nm and peak transmittances of 15 to 50 percent are possible. Manufacturing problems are considered, and a technique is described that utilizes two rotating masks between the evaporation source and the substrate to produce layer thickness variations. Uses and advantages of VCVF's are also presented. Typical applications include instruments such as colorimeters, spectrometers, and water pollution analyzers.

Paper Details

Date Published: 1 March 1974
PDF: 8 pages
Proc. SPIE 0050, Optical Coatings: Applications and Utilization I, (1 March 1974); doi: 10.1117/12.954112
Show Author Affiliations
Dennis Kitchens, Optical Coating Laboratory, Inc. (United States)


Published in SPIE Proceedings Vol. 0050:
Optical Coatings: Applications and Utilization I
Gary W. DeBell; Douglas H. Harrison, Editor(s)

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