&lt;title&gt;Optical processing through turbulent media&lt;/title&gt;

Taylor, Travis S.; Kransteuber, Amy S.; Gregory, Don A.; McClain, John L.

doi:10.1117/12.235662

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2009

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“…An adaptive optics (AO) system is necessary for large aperture telescopes to obtain clear images of space objects [1][2][3][4][5]. An AO system with a deformable mirror (DM), a microelectronic mechanical system (MEMS), and a liquid-crystal (LC) wavefront corrector have been investigated and demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Real-time liquid-crystal atmosphere turbulence simulator with graphic processing unit

Hu¹,

Li²,

Li³

et al. 2009

Opt. Express

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To generate time-evolving atmosphere turbulence in real time, a phase-generating method for our liquid-crystal (LC) atmosphere turbulence simulator (ATS) is derived based on the Fourier series (FS) method. A real matrix expression for generating turbulence phases is given and calculated with a graphic processing unit (GPU), the GeForce 8800 Ultra. A liquid crystal on silicon (LCOS) with 256x256 pixels is used as the turbulence simulator. The total time to generate a turbulence phase is about 7.8 ms for calculation and readout with the GPU. A parallel processing method of calculating and sending a picture to the LCOS is used to improve the simulating speed of our LC ATS. Therefore, the real-time turbulence phase-generation frequency of our LC ATS is up to 128 Hz. To our knowledge, it is the highest speed used to generate a turbulence phase in real time.

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