Spectroscopy and Spectral Analysis, Volume. 32, Issue 2, 553(2012)
Design of a Dual-Channel Mach-Zehnder Lateral Shearing Interferometer for the Large Aperture Static Imaging Spectrometer
Large aperture static imaging spectrometry (LASIS) is a kind of joint temporally and spatially modulated Fourier transform imaging spectrometry. In such instruments, lateral shearing interferometer is a key element, the most frequently used type of which is the Sagnac interferometer. In this configuration, one half of the light entering the interferometer backtracks and causes a great decrease in energy efficiency. The present paper proposes a modified Mach-Zehnder lateral shearing interferometer structure to tackle this problem. With the ability to produce the same lateral shear, it features the advantage of dual channel output. We present a ray tracing procedure to induce the general expression of the lateral shear as well as analyze the contributions of error sources to the shear accuracy. The results serve as a new idea for the design of large aperture static imaging spectrometers and can be used to instruct the design and optimization of this kind of imaging spectrometer.
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FU Qiang, XIANGLI Bin, LV Qun-bo, JING Juan-juan. Design of a Dual-Channel Mach-Zehnder Lateral Shearing Interferometer for the Large Aperture Static Imaging Spectrometer[J]. Spectroscopy and Spectral Analysis, 2012, 32(2): 553
Received: Apr. 7, 2011
Accepted: --
Published Online: Feb. 20, 2012
The Author Email: Qiang FU (vorQ.Fu@hotmail.com)