Modal wavefront correction with liquid crystals

Different options

Conference paper (2005)
Department
Electronic Instrumentation (EEMCS) (TU Delft)
Copyright: ©2005 Loktev, M., Vdovin, G., Klimov, N., Kotova, S., Naumov, A.
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Published Date

12-04-2005

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Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Source:

Proceedings of SPIE, 2005 vol. 5741

ISSN:

0277-786X

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electronic Instrumentation

Abstract

Liquid crystal (LC) wavefront correctors with modal addressing are described. Three different approaches are considered. The first one is based on a continuous thin-film resistive layer. This layer is used for forming of the local voltage profile that controls the phase distribution across the corrector’s aperture. The second approach is a modification of the first one, where the continuous resistive coating is replaced by a network of discrete resistors. It is based on silicon technology. The third approach makes use of distributed electric field in thick dielectric layers for forming of the modal response of an actuator. Technologies, methods of control and experimental results are discussed for each case.

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