COAT: Modal-Zonal Comparison.
GENERAL RESEARCH CORP MCLEAN VA WASHINGTON OPERATIONS
Pagination or Media Count:
The objective of this program was to assess the effects of target-COAT interactions comparing modal multidither with zonal multidither and phase-conjugate systems. A potential problem exists when target modulation overlaps the COAT sensing bandwith, causing erroneous control signals to be generated. Differences in modal and zonal transmitters are of potential importance in closed-loop performance with distributed targets. The performance of a modal multidither Coherent Adaptive Optics Techniques COAT System is investigated via simulations with distributed dynamic targets. Target influence on performance is shown to be similar to that of zonal systems in that target effects can degrade and prevent convergence. However, additional design alternatives are shown to be possible with a modal system that cannot be achieved with a zonal system.
- Optical Detection and Detectors