Mr. Kazuhiro Miyakawa Profile

Kazuhiro Miyakawa

at Topcon Corp

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Proceedings Article | 20 September 2002 Paper

High-quality image reconstruction with self-pumped phase conjugation

Kazuhiro Miyakawa, Masafumi Ichinose, Masafumi Yamashita

Proceedings Volume 4919, (2002) https://doi.org/10.1117/12.465829

KEYWORDS: Phase conjugation, Image quality, Crystals, CCD cameras, Image processing, Laser crystals, Optical testing, Image restoration, Argon ion lasers, Image analysis

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Improvement of quality on reconstructed self-pumped phase conjugate images has been investigated. Since self-pumped phase conjugate beams generally fluctuate as a function of irradiation time, spatial and temporal changes of their fluctuations make the quality of images lower. It is necessary to study elimination of these fluctuations from phase conjugate beams for reconstruction of high quality images. However, it will be expected that this condition be decided by the intensity distribution of incident beam. In our experiments, transparent samples which consist of some thick layers were irradiated by cw argon ion laser (wavelength: 514.5nm), and recorded phase conjugate and input images were analyzed using image processing technique as a function of irradiation time. As a result, it was obvious that phase conjugate images from volume sample were stable. Finally, imaging of transparent object was studied from point of view of some thick layers and their application to optical measurements using self-pumped phase conjugate mirror were discussed.

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