Physics – Optics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1351..780v&link_type=abstract
IN: Digital image synthesis and inverse optics; Proceedings of the Meeting, San Diego, CA, July 9-13, 1990 (A92-18776 05-74). Be
Physics
Optics
Coherent Light, Computerized Simulation, Image Reconstruction, Laser Interferometry, Speckle Interferometry, Charge Coupled Devices, Imaging Techniques, Wave Front Reconstruction
Scientific paper
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. The image synthesis procedure is described, and images reconstructed from computer simulated laser-speckle fields are presented. Noise was added to simulated wavefront-difference measurements to illustrate the effect on the imagery. A Shack-Hartmann type of wavefront sensor is also described that was 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 an adaptation of the basic imaging technique is described that can be used to image coherently-illuminated objects through optical phase distortions.
Dayton David C.
Gonglewski John D.
Idell Paul S.
Voelz David G.
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