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Proceedings Paper

Neutral thin film filters with low reflectivity for sensitometry
Author(s): Evgeni B. Brik; L. A. Tkacheva; V. I. T'urnikova
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Paper Abstract

Traditionally neutral light filters are made of glass (HC6, H7, HC8, etc.). There exists thin film technology for neutral-gray filters production with the use of vacuum evaporation on transparent glass substrates. To minimize residual reflectivity it is desirable to fulfill the following relation between refraction factor n of MgF2 layer and optical conductivity Z of metal-dielectric mixture on the glass substrate: Z((lambda) ) n, where (lambda) - is a wavelength. It is shown, that to reduce dispersion of Z((lambda) ) in the visible it is necessary to use low thickness of metal layers in NTFF, that is of 3 to 5 nm.

Paper Details

Date Published: 31 December 1993
PDF: 1 pages
Proc. SPIE 2161, CIS Selected Papers: Photometry, (31 December 1993); doi: 10.1117/12.166366
Show Author Affiliations
Evgeni B. Brik, Teknologiya Association (Russia)
L. A. Tkacheva, Teknologiya Association (Russia)
V. I. T'urnikova, Teknologiya Association (Russia)


Published in SPIE Proceedings Vol. 2161:
CIS Selected Papers: Photometry
Leonid S. Ushakov, Editor(s)

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