Abstract
The intensity transmittivity of the optical system of a spectrometer based on polarization interference imaging spectroscopy for remote sensing applications is calculated. In term of the optical design of the instrument, the calculated transmittivity for its optical system are given for input unpolarized light and linearly polarized light, respectively. The factors influencing its transmittivity are analyzed for both cases. The maximal transmittivity efficiency for the polarized light is two times of that of the unpolarized light. The surface reflection ratio of the optical elements and the absorption ratio of the optical materials are two main factors to impact the transmittivity for the two kinds of incident light, and the polarization direction of the incident light is also an important factor for the polarized light. The minimum value of the light intensity of a weak target which can be detected with the imaging spectrometer can be estimated based on the transmittivity analysis in this paper.
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