Low-latency adaptive optical system processing electronics

Terry S. Duncan; Joshua K. Voas; Robert J. Eager; Scott C. Newey; John L. Wynia

doi:10.1117/12.458955

7 February 2003 Low-latency adaptive optics system processing electronics

Terry S. Duncan, Joshua K. Voas, Robert J. Eager, Scott C. Newey, John L. Wynia

Proceedings Volume 4839, Adaptive Optical System Technologies II; (2003) https://doi.org/10.1117/12.458955
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

Extensive system modeling and analysis clearly shows that system latency is a primary performance driver in closed loop adaptive optical systems. With careful attention to all sensing, processing, and controlling components, system latency can be significantly reduced. Upgrades to the Starfire Optical Range (SOR) 3.5-meter telescope facility adaptive optical system have resulted in a reduction in overall latency from 660 μsec to 297 μsec. Future efforts will reduce the system latency even more to the 170 msec range. The changes improve system bandwidth significantly by reducing the "age" of the correction that is applied to the deformable mirror. Latency reductions have been achieved by increasing the pixel readout pattern and rate on the wavefront sensor, utilizing a new high-speed field programmable gate array (FPGA) based wavefront processor, doubling the processing rate of the real-time reconstructor, and streamlining the operation of the deformable mirror drivers.

Citation Download Citation

Terry S. Duncan, Joshua K. Voas, Robert J. Eager, Scott C. Newey, and John L. Wynia "Low-latency adaptive optics system processing electronics", Proc. SPIE 4839, Adaptive Optical System Technologies II, (7 February 2003); https://doi.org/10.1117/12.458955

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