J. Xiong et al., A MODEL FOR INCORPORATING THE EFFECTS OF NONZERO SWITCHING-TIME CONSTANTS IN ELECTROOPTIC MASKS USED IN HADAMARD-TRANSFORM SPECTROMETRY, IEEE transactions on instrumentation and measurement, 45(4), 1996, pp. 800-804
Hadamard-transform (HT) spectrometers offer a multiplex advantage over
conventional monochromators, making them very useful in situations in
which the signal-to-noise ratio is low. HT spectrometers having no mo
ving parts can be implemented by substituting an electrooptic mask for
the moving mask in the optical path, However, the physical properties
of an electrooptic mask introduce two types of nonidealities-static a
nd dynamic-into the measurement system, These nonidealities can cause
distortions in the acquired spectra if their effects are neglected in
the signal-recovery process, We have developed two complete system mod
els that incorporate the effects of both static and dynamic nonidealit
ies. In addition, we have devised recovery schemes applicable for each
system model and have designed computationally efficient implementati
ons of the recovery schemes.