Adaptive optics for industry and medicine: proceedings of - download pdf or read online

By Ulrich Wittrock

ISBN-10: 3540239782

ISBN-13: 9783540239789

This e-book treats the advance and alertness of adaptive optics for and medication. The contributions describe lately constructed elements for adaptive-optics platforms equivalent to deformable mirrors, wavefront sensors, and reflect drivers in addition to whole adaptive optical platforms and their purposes 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 in line with 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 all started in 1997 and keeps with the fifth workshop in Beijing in 2005.

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

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6 to 36 S. Somalingam et al. 85. 15 µm compared to a DVD. This enables the BD-type disk to store up to 27 GB per layer on a standardized disk of 12 cm diameter, which is five times more than the recording capacity of a current DVD. A. of the objective lens and is in addition inversely proportional to the wavelength [1]. A. lenses and short wavelengths. S is the sensitivity of the system and d denotes the cover layer thickness. )4 . In a BD-system spherical aberration occurs once because of mass-production limited waviness of the surfaces of the disks.

We have developed a novel transmissive nematic liquid crystal device which is capable of compensating spherical wavefront aberration that occurs during the operation of optical pickup systems. 85. A. systems have an inherent higher sensitivity on aberrations. A. of the objective lens. In an optical pickup system there are two sources for spherical aberration: The first one is the variation of the substrate thickness due to manufacturing tolerances under mass production conditions. The second one concerns disks with multiple data-layers, which cause spherical aberration when layers are switched, as the objective lens can only be optimized for a single layer thickness.

Vdovin and M. Loktev Fig. 3. Interferometric patterns of a one-inch 19-channel thermal deformable mirror registered in a Twyman–Green interferometer with a flat reference. 3 Optical Performance of a Thermal Mirror The mirror was tested in a closed-loop AOS with Hartmann wavefront sensor (see Fig. 4). The reference arm, normally blocked, was used for calibration of the Hartmann sensor and also provided an independent method of mirror testing by observing live interferometric patterns obtained by removing the mask and by shifting the CCD forward into the image plane.

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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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