Title :
Design of Far-Infrared Interferometer at 10.6μm
Author :
Wu Yongqian ; Zhang Yudong ; Wu Fan
Author_Institution :
Inst. of Opt. & Electron., Chinese Acad. of Sci., Chengdu, China
Abstract :
The design and system performance of an far-infrared interferometer is presented. A CO2 laser is used as a light source operating at a 10.6 mum wavelength. A He-Ne laser is introduced into the interferometer to solve problems concerning with alignment. The instrument is capable of testing rough aspheric surfaces. It can be used to evaluate the refractive index deviation in the infrared materials too. The measuring error (RMS) of the interferometer is less than lambda/200 (lambda = 10.6 mum).
Keywords :
carbon compounds; gas lasers; helium; interferometers; neon; submillimetre wave lasers; CO2 laser; He-Ne laser; aspheric surfaces; far-infrared Interferometer; infrared materials; light source; measuring error; refractive index deviation; wavelength 10.6 mum; Instruments; Light sources; Optical interferometry; Optical materials; Refractive index; Rough surfaces; Surface roughness; System performance; Testing; Wavelength measurement;
Conference_Titel :
Photonics and Optoelectronics, 2009. SOPO 2009. Symposium on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4412-0
DOI :
10.1109/SOPO.2009.5230069
