Optical measurements with phase-conjugate mirrors |
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| Authors: | R. Kowarschik L. Wenke T. Baade M. Esselbach A. Kiessling G. Notni K. Uhlendorf |
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| Affiliation: | Friedrich-Schiller-University Jena, Institute for Applied Optics, Fr?belstieg 1, 07743 Jena, Germany (Fax: +49-3641/947652; E-mail: kowar@pinet.uni-jena.de), DE
Fraunhofer-Institute for Applied Optics and Precision Engineering, Schillerstrasse 1, 07745 Jena, Germany, DE
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| Abstract: | Phase-conjugate mirrors on the basis of photorefractive crystals offer interesting possibilities of application for optical measurement systems. In this paper we report on the application of phase-conjugate mirrors (PCMs) for optical measurement techniques. We show different schemes for realizing PCMs and discuss characteristics such as reflectivity, fidelity, and time behavior. We demonstrate that two-beam interferometers with PCMs and with a suitable phase-shifting unit in the reference arm have general advantages compared with conventional systems. It is shown that self-pumped PCMs (SPPCMs) could also be successfully used for novelty filtering systems comparing a present state of a signal phase with a reference phase. It is found that SPPCMs can improve both the axial and the lateral resolution of a confocal microscope. A 30% better resolution of the PCM system is established. Received: 14 June 1999 / Revised version: 4 October 1999 / Published online: 3 November 1999 |
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| Keywords: | PACS: 07.60.Ly 42.30.Yc 42.65.Hw |
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