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

被引:9
作者
BOCK, JJ
LANGE, AE
机构
[1] Department of Physics, California Institute of Technology, Pasadena, CA
来源
APPLIED OPTICS | 1995年 / 34卷 / 31期
关键词
FAR-INFRARED; LOW-PASS FILTER; SPECTROSCOPY;
D O I
10.1364/AO.34.007254
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
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 to 10,000 cm(-1). The total transmittance is > 50% for nu < 50 cm(-1) and is calculated to be < 10(-9) for nu > 300 cm(-1). The filter was successfully used in a liquid-helium-cooled, rocketborne, far-infrared absolute photometer. (C) 1995 Optical Society of America
引用
收藏
页码:7254 / 7257
页数:4
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