Atmospheric modeling with the intent of training a neural net wavefront sensor

Details Atmospheric modeling with the intent of training a neural net wavefront sensor Atmospheric modeling with the intent of training a neural net wavefront sensor

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1688..527c&link_type=abstract

In: Atmospheric propagation and remote sensing; Proceedings of the Meeting, Orlando, FL, Apr. 21-23, 1992 (A93-37102 14-74), p.

Physics

Optics

1

Atmospheric Models, Atmospheric Turbulence, Infrared Detectors, Neural Nets, Reflecting Telescopes, Wave Fronts, Aberration, Computerized Simulation, Low Noise, Mirrors, Real Time Operation

Scientific paper

Modeling atmospheric turbulence which plays a critical role in the training of neural network wavefront sensors is discussed in the framework of an adaptive optics program for the multiple mirror telescope. It is concluded that the accuracy of the wavefront correction possible with a neural network directly depends on the similarity of the training images to those seen in the telescope. The image simulations used in the training of neural network wavefront sensors are based on a random mid-point displacement (RMD) algorithm and sine wave summation algorithms. The RMD algorithm is considered to be an extremely fast method of wavefront generation used for very large arrays and image sequences without time evolution. Multiple turbulent layer atmospheric models based on the sine wave summation algorithm create image sequences with temporal structure functions that closely match real structure function data.

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