Abstract

A spatially multiplexed infrared camera is described. The camera records an image by measuring the coefficients of an orthogonal series expansion of the two-dimensional radiance distribution. By choice of appropriate functions, significant gains in the picture signal-to-noise ratio can be realized. We have constructed a camera utilizing this multiplexing principle to record images of astronomical objects at infrared wavelengths, where conventional scanning systems perform badly because of low signal levels. Test results verify that the camera exhibits the increase of efficiency expected of a multiplexing system, allowing exposure times two orders of magnitude shorter than necessary for comparable scanning systems.

© 1975 Optical Society of America

Enhancement of multiple images by sampling spatial filtering using additional auxiliary sampling

A. Kalestyński
J. Opt. Soc. Am. 65(12) 1443-1447 (1975)

Temporal- and spatial-intensity-interferometer imaging through a random medium

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Influence of noise on the measurement of optical transfer functions by the digital Fourier-transform method

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