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Tensors mesons in AdS/QCD
None
Date:
October 30, 2005
Creator:
Katz, Emanuel; Lewandowski, Adam & Schwartz, Matthew D.
System:
The UNT Digital Library
The Sns Ring Vacuum Systems.
None
Date:
October 30, 2005
Creator:
Mapes, M.; Hseuh, H. C.; Rank, J.; Smart, L.; Todd, R. & Weiss, D.
System:
The UNT Digital Library
Extreme Adaptive Optics Testbed: Performance and Characterization of a 1024 Deformable Mirror
We have demonstrated that a microelectrical mechanical systems (MEMS) deformable mirror can be flattened to < 1 nm RMS within controllable spatial frequencies over a 9.2-mm aperture making it a viable option for high-contrast adaptive optics systems (also known as Extreme Adaptive Optics). The Extreme Adaptive Optics Testbed at UC Santa Cruz is being used to investigate and develop technologies for high-contrast imaging, especially wavefront control. A phase shifting diffraction interferometer (PSDI) measures wavefront errors with sub-nm precision and accuracy for metrology and wavefront control. Consistent flattening, required testing and characterization of the individual actuator response, including the effects of dead and low-response actuators. Stability and repeatability of the MEMS devices was also tested. An error budget for MEMS closed loop performance will summarize MEMS characterization.
Date:
October 30, 2005
Creator:
Evans, J. W.; Morzinski, K.; Severson, S.; Poyneer, L.; Macintosh, B.; Dillon, D. et al.
System:
The UNT Digital Library