OPTIMIZATION OF DIFFUSE REFLECTANCE INFRARED-SPECTROSCOPY ACCESSORIES

被引：11
|
作者：
HIRSCHFELD, T
机构：
[1] Lawrence Livermore Natl Lab,, Livermore, CA, USA, Lawrence Livermore Natl Lab, Livermore, CA, USA
来源：
APPLIED SPECTROSCOPY | 1986年 / 40卷 / 08期
关键词：
MIRRORS; -; Applications;
D O I：
10.1366/0003702864507729
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The value of diffuse reflectance as an infrared or near-infrared spectroscopic sampling procedure has been limited by the low efficiency of accessories designed for it. In terms of signal-to-noise ratio, these average 2-6% for integrating spheres and 10-12% for various ellipsoidal mirror arrangements. Much better performances, up to 37% efficiency, can be obtained by optimizing a concentric confocal ellipsoidal mirror arrangement by using a very large central opening in the amular collector mirror, and adapting the throughput of the detector to the geometry of the collected beam.
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页码：1082 / 1085
页数：4
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