1 November 1990 Coherent image synthesis using a Shack-Hartmann wavefront sensor
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Abstract
It has been suggested that high resolution images of laser illuminated objects can be digitally synthesized from measurements of the wavefront slope (gradient) associated with the backscattered laser-speckle field. We describe the image synthesis procedure and present images reconstructed from computer simulated laser-speckle fields. Noise was added to simulated wavefront-difference measurements to illustrate the effect on the imagery. We also describe a Shack-Hartmann type of wavefront sensor that was designed and built at the Weapons Laboratory and initially used to investigate the distribution of ray directions in a speckle field. Imaging results obtained with the sensor in the laboratory are presented and we describe an adaptation of the basic imaging technique that can be used to image coherently illuminated objects through optical phase distortions.
© (1990) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David G. Voelz, John D. Gonglewski, Paul S. Idell, David Charles Dayton, "Coherent image synthesis using a Shack-Hartmann wavefront sensor", Proc. SPIE 1351, Digital Image Synthesis and Inverse Optics, (1 November 1990); doi: 10.1117/12.23683; https://doi.org/10.1117/12.23683
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