Optical Noise Removal in the Focal Plane of the Spaceborne Camera

Abstract

We discuss two possible optical noise sources in an electro-optic camera loaded on a low earth orbit satellite. The first noise source was a reflection at the window for signal rays incident upon the window which is placed before the FPA plane. The second noise source came from a reflection at the surface of the FPA cell when the signal flux is not entirely absorbed. We investigate the noise generation processes for two optical noise sources, and a parametric solution is used to estimate the optical noise effects.

Optical system design of star sensor and stray light analysis

“…Stray light is the unwanted light reaching the detector and reducing the image quality. These incoherent and discrete lights do not follow the normal optical path of the imaging system [25][26][27][28][29][30]. Stray light in an optical system may lead to restrictions on detector dynamic range, artificial effects (ghost) in the image, and blurring as well as reducing image contrast, signal to noise ratio, resolution, and desirable FOV [25][26][27][28].…”