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

D'nardo Colucci; Michael Lloyd-Hart; Peter L. Wizinowich; James Roger P. Angel

doi:10.1117/12.137920

1 August 1992 Atmospheric modeling with the intent of training a neural net wavefront sensor

D'nardo Colucci, Michael Lloyd-Hart, Peter L. Wizinowich, James Roger P. Angel

Proceedings Volume 1688, Atmospheric Propagation and Remote Sensing; (1992) https://doi.org/10.1117/12.137920
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

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.

Citation Download Citation

D'nardo Colucci, Michael Lloyd-Hart, Peter L. Wizinowich, and James Roger P. Angel "Atmospheric modeling with the intent of training a neural net wavefront sensor", Proc. SPIE 1688, Atmospheric Propagation and Remote Sensing, (1 August 1992); https://doi.org/10.1117/12.137920

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