Ulrich Wittrock's Adaptive optics for industry and medicine: proceedings of PDF

By Ulrich Wittrock

ISBN-10: 3540239782

ISBN-13: 9783540239789

This publication treats the improvement and alertness of adaptive optics for and drugs. The contributions describe lately built elements for adaptive-optics platforms comparable to deformable mirrors, wavefront sensors, and replicate drivers in addition to entire adaptive optical platforms and their functions in and medication. 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 profitable sequence of workshops on adaptive optics all started in 1997 and keeps with the fifth workshop in Beijing in 2005.

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Extra info for Adaptive optics for industry and medicine: proceedings of the 4th international workshop, MuМ€nster, Germany, Oct. 19-24, 2003

Example text

To achieve such a conjugation, an imaging optical system is used to make the image of the corrector co-incident with the eye. Breadboard adaptive optical set-ups based on this principle demonstrate the feasibility of high-order correction [5–7]. These breadboard set-ups cannot be converted into wearable devices due to their bulkiness and complexity. Another ophthalmic problem that can be corrected with adaptive optics is the agerelated or post-surgery loss of accommodation. Attempts were made to develop a corrector for presbyopia [8] with moderate practical success.

This problem can be solved by deposition of a thick oxide layer over the whole structure and its subsequent planarization using ion beam polishing technique. 2 LC-MWC Based on Discrete IC Resistors As we see from the previous section, manufacturing of the LC-MWC with continuous resistive layer cannot be accomplished in the framework of standard bipolar and CMOS processes; it requires additional technological steps that can increase the processing costs. Practical implementation of the proposed approach, however, can be done indirectly.

The main advantage of the resistor as a thermal actuator is its very low cost. The price of a resistor can be as low as one cent, and it can provide elongation of tens of micrometers. Piezo-ceramic actuators with comparable elongation would be priced in the range of tens to hundreds of US dollars. Naturally, thermal actuators do not demonstrate any considerable hysteresis and can be driven by a very simple current sources. Low stiffness and slow response are the main disadvantages and the design of the deformable mirror should compensate for these disadvantages.

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Adaptive optics for industry and medicine: proceedings of the 4th international workshop, MuМ€nster, Germany, Oct. 19-24, 2003 by Ulrich Wittrock


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