Instrumentation, Techniques, and Measurement

Effect of nonconstant mirror misalignment of moving mirror in Fourier transform spectrometer

[+] Author Affiliations
Grzegorz Szymański, Leszek Wawrzyniuk

Warsaw University of Technology, Faculty of Mechatronics, Institute of Micromechanics and Photonics, Sw. A. Boboli 8 Street, Warsaw 02-525, Poland

Opt. Eng. 54(7), 074101 (Jul 06, 2015). doi:10.1117/1.OE.54.7.074101
History: Received March 18, 2015; Accepted June 8, 2015
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Abstract.  Remote sensing Fourier transform spectrometers are required to be robust and portable. Introducing moving flat mirrors instead of cube corner refractors simplifies the spectrometer design and makes it more compact. Flat mirrors, however, introduce additional angular errors. We analyze the effect of tilted beams on spectral line shape and derive a mathematic equation for this effect based on the diffraction theory. A rough estimate equation for the intensity of two interfering beams based on the amount of tilt between them is presented. A case of a varying amount of tilt during moving mirror scanning is presented and various forms of mirror misalignment are analyzed.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Grzegorz Szymański and Leszek Wawrzyniuk
"Effect of nonconstant mirror misalignment of moving mirror in Fourier transform spectrometer", Opt. Eng. 54(7), 074101 (Jul 06, 2015). ; http://dx.doi.org/10.1117/1.OE.54.7.074101


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