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Interferential dichroic filter

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Adrian Rizea

Editorial: Scientific Bulletin of the University Politehnica of Bucharest, series A (Applied Mathematics and Physics), 2004.


The aim of the present paper is to provide a description of the general aspects regarding the theoretical concept, the structure, the execution and the properties of an interferential filter used in a medical application. The main functional characteristic of this filter is to block the radiation supplied by a He-Ne laser ( = 632,8 nm), allowing to passing only the higher wavelength radiation ( > 650 nm). The most important problem that has appeared at the performing of this filter was the obtaining of an abrupt slope of the spectral transmission curve in 645-665 nm range.

Cuvinte cheie: optical coatings; thin layers; dichroic filters; minus filters