Download Adaptive Optics for Industry and Medicine: Proceedings of by G. Vdovin (auth.), Professor Dr. Ulrich Wittrock (eds.) PDF

By G. Vdovin (auth.), Professor Dr. Ulrich Wittrock (eds.)

This e-book treats the advance and alertness of adaptive optics for and medication. The contributions describe lately built elements for adaptive-optics structures comparable to deformable mirrors, wavefront sensors, and reflect drivers in addition to entire adaptive optical structures and their purposes in and medication. purposes variety from laser-beam forming and adaptive aberration correction for high-power lasers to retinal imaging in ophthalmology. The contributions are in line with displays made on the 4th overseas 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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Additional info for Adaptive Optics for Industry and Medicine: Proceedings of the 4th International Workshop Münster, Germany, Oct. 19–24, 2003

Example text

The whole electrode structure was etched out of the same ITO layer of around 100 Ω/sq. sheet resistance. 5 times smaller total resistance than the narrow lateral stripe electrode. This causes the potential drop along the lateral electrode. The conjoint spots of the rings on the lateral electrode acquire the particular local potential. And the potential changes linearly from ring to ring. In combination with the homogeneous electrode on the second substrate a spherical voltage distribution inside the cell cavity appears.

The effect of the LC device in this mode of operation is similar to placing a variable telescope optic into the beam path. Our LC device consists of concentric ring electrodes to generate parabolic phase profiles to deform the wavefront that enters the objective lens. Simulations were made using the software ZEMAX to evaluate the extent of spherical aberration in a BD-system with dual data layers and to study the effect of compensation using the LC device. A. objective lens system which focuses perfectly on the 100 µm data layer, shows spherical aberration in the order of 550 mλ (RMS) when focusing on the 80 µm layer.

3. Driving signals should be applied only to some pixels in this network; we can call them active and other pixels passive. The network of resistors provides gradual voltage variation between the pixels. Such a combination of zonal and modal approaches should result in a modulator with large amount of pixels driven by much smaller number of control channels. 1), where ρs should be replaced by the resistance of a single resistor. To take into account possible variation of individual resistances, we have performed numerical simulation using the system of equations, which consists of Kirchhoff’s rules defined for all nodes of the network.

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