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Photonics Dictionary

coded aperture imaging

An imaging process in which the single opening of a simple pinhole camera is replaced with many openings called, collectively, the aperture. The recorded picture, which consists of many overlapping images of the object, bears, in general, no resemblance to the object. Computer or optical processing is required to produce the reconstructed object, which should resemble the original object. Coded aperture imaging is used to improve signal-to-noise ratio in the reconstructed image by increasing the collecting area while maintaining the angular resolution of the small opening.
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