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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Mid-infrared Interferometer Operating at 4.41μm: Design, Fabrication and Application
verfasst von : Qun Yuan, Zhishan Gao, Rihong Zhu, Jun Ma
Erschienen in: Fringe 2013
Verlag: Springer Berlin Heidelberg
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The application of mid-infrared optics in 3-5
μ
m is booming nowadays, but the tools for metrology still lack. For example, modulation transfer function is commonly used to evaluate the optical transmission system [1]; refractive index measurement requires sophisticated equipment or complex mathematical algorithms [2]. These prompt the demand for interferometer at this spectral band. In view of the cost-effectiveness, one detector should be shared for both alignment and view. Besides, 4.41
μ
m is selected here as the primary working wavelength, but the spectral band should be expanded to make the interferometer mainframe versatile. The working wavelength of commercial mid-infrared interferometer is 3.39
μ
m worldwide, while also considering the common long-infrared interferometer working at 10.6
μ
m, the interferometer should provide a broadband wavelength channel.