Analysis And System Design Framework For Infrared Spatial Heterodyne Spectrometers
INFRARED IMAGING SYSTEMS: DESIGN, ANALYSIS, MODELING, AND TESTING X(1999)
Abstract
We present a preliminary analysis and design framework developed for the evaluation and optimization of infrared, Imaging Spatial Heterodyne Spectrometer (SHS) electro-optic systems. Commensurate with conventional interferometric spectrometers, SHS modeling requires an integrated analysis environment for rigorous evaluation of system error propagation due to detection process, detection noise, system motion, retrieval algorithm and calibration algorithm. The analysis tools provide for optimization of critical system parameters and components including: i) optical aperture, f-number, and spectral transmission, ii) SHS interferometer grating and Littrow parameters, and iii) image plane requirements as well as cold shield, optical filtering, and focal-plane dimensions, pixel dimensions and quantum efficiency, iv) SHS spatial and temporal sampling parameters, and v) retrieval and calibration algorithm issues.
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Key words
infrared Fourier Transform Spectroscopy, spatially modulated FTS
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