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Low-Distortion Imaging Spectrometer Designs utilizing Convex Gratings

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Abstract

The requirement for very low distortion in pushbroom imaging spectrometers has been recently recognized. It has been shown that the spectral response function of a pixel must be known with great accuracy.1 A small uncertainty in the location of the peak of this function can lead to significant error in the calculated pixel radiance. A maximum shift of less than 1% of the spectral response function (e.g. 0.1 nm in 10nm halfwidth) has been identified as desirable in order to produce data that are free of significant spectral calibration errors.

© 1998 Optical Society of America

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