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Far-infrared bandpass filters from perforated metal screens

URN to cite this document:
Huggard, P. G. ; Meyringer, M. ; Schilz, A. ; Goller, K. ; Prettl, Wilhelm
Date of publication of this fulltext: 04 Oct 2010 12:30


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. ...


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