Effects of intensity thresholding on the power spectrum of laser speckle

Alfred Dale Ducharme; Glenn D. Boreman; Donald R. Snyder

doi:10.1117/12.154734

31 August 1993 Effects of intensity thresholding on the power spectrum of laser speckle

Alfred Dale Ducharme, Glenn D. Boreman, Donald R. Snyder

Proceedings Volume 1969, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IV; (1993) https://doi.org/10.1117/12.154734
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

Spatial-frequency filtering of laser speckle patterns has proven to be a useful tool in the measurement of MTF for focal plane arrays. Intensity thresholding of the laser speckle patterns offers nearly an order of magnitude savings in digital storage space. The effect of this thresholding on the spatial-frequency power spectral density of the speckle pattern is investigated. An optimum threshold level is found that minimizes distortion of the power spectrum for the classes of speckle data used for MTF testing.

Citation Download Citation

Alfred Dale Ducharme, Glenn D. Boreman, and Donald R. Snyder "Effects of intensity thresholding on the power spectrum of laser speckle", Proc. SPIE 1969, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing IV, (31 August 1993); https://doi.org/10.1117/12.154734

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