By Ulrich Wittrock
This ebook treats the improvement and alertness of adaptive optics for and drugs. The contributions describe lately built parts for adaptive-optics platforms resembling deformable mirrors, wavefront sensors, and reflect drivers in addition to whole adaptive optical platforms and their purposes in and drugs. functions variety from laser-beam forming and adaptive aberration correction for high-power lasers to retinal imaging in ophthalmology. The contributions are according to shows made on the 4th foreign Workshop on Adaptive Optics in and drugs which came about in Münster, Germany, in October 2003. This hugely winning sequence of workshops on adaptive optics began in 1997 and maintains with the 5th workshop in Beijing in 2005.
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Extra info for Adaptive Optics for Industry and Medicine: Proceedings of the 4th International Workshop, Münster, Germany, Oct. 19-24, 2003
Highland: Liquid crystal phase modulator for adaptive optics. Temporal performance characterization. Opt. Comm. 141, 247 (1997) 8. F. Naumov, G. Vdovin: Multichannel liquid crystal-based wavefront corrector with modal inﬂuence functions. Opt. Lett. 23, 1550 (1998) 9. C. M. M. D. Cowan, M. Lee: Microelectro-mechanical deformable mirrors for aberration control in optical systems. Opt. Quantum Electr. 31, 451 (1999) 10. G. M. Sarro: Flexible mirror micromachined in silicon. Appl. Opt. 34, 2968 (1995) 11.
Hartmann test reconstruction of the planarized surface of the thermal deformable mirror nals applied to the mirror actuators for a long time will completely spoil the mirror ﬁgure. This control system can be operating only in dynamics, constantly “pushing” and “pulling” the actuators in the direction of right positions with forces that are much higher than ultimately necessary to reach these positions. 4 Conclusions Thermal mirrors represent a useful alternative to more expensive mirrors based on piezoelectric and electrostatic drive.
It is shown that variation of any of these parameters for a given contact changes either its electro-optic response or the result of its interaction with neighboring contacts . It is necessary to realize which set of control parameters provides maximum ﬂexibility in control of the device and maximum correction quality. With this purpose we performed investigation of several methods of control using numerical simulation and analytic approach. Some of the results 32 M. Loktev and G. Vdovin were veriﬁed experimentally using a prototype; the details are given in .