PERFORMANCE OF A LOW-PASS FILTER FOR FAR-INFRARED WAVELENGTHS

Authors
BOCK JJ LANGE AE
Citation
Jj. Bock et Ae. Lange, PERFORMANCE OF A LOW-PASS FILTER FOR FAR-INFRARED WAVELENGTHS, Applied optics, 34(31), 1995, pp. 7254-7257
Citations number
9
Categorie Soggetti
Optics
Journal title
Applied optics → ACNP
ISSN journal
00036935
Volume
34
Issue
31
Year of publication
1995
Pages
7254 - 7257
Database
ISI
SICI code
0003-6935(1995)34:31<7254:POALFF>2.0.ZU;2-3
Abstract
We describe a low-pass filter that provides high in-band transmittance and excellent rejection at nu > 100 cm(-1). The transmittance of the filter components was measured at liquid-helium temperatures from 10 t o 10,000 cm(-1). The total transmittance is > 50% for nu < 50 cm(-1) a nd is calculated to be < 10(-9) for nu > 300 cm(-1). The filter was su ccessfully used in a liquid-helium-cooled, rocketborne, far-infrared a bsolute photometer. (C) 1995 Optical Society of America