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Far-infrared bandpass filters from perforated metal screens.

Authors
Type
Published Article
Journal
Applied optics
Publication Date
Volume
33
Issue
1
Pages
39–41
Identifiers
DOI: 10.1364/AO.33.000039
PMID: 20861984
Source
Medline
License
Unknown

Abstract

Precision nickel printing screens are shown to be very useful as far-infrared bandpass filters. For a range of such regularly perforated sheets, transmission peaks of ~ 0.9 have been observed to lie at frequencies between 60 and 140 cm(-1). We found that this value shows little degradation by cascading several screens, but the overall filter Q value may be increased from 2.7 to a value of ~ 6. These screens have considerable advantages over conventional far-infrared bandpass filters in terms of strength, optical characteristics, and cost.

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