Tracking filter using self-pumped phase conjugation

Thomas Harrer; Azad Siahmakoun

doi:10.1117/12.140951

2 September 1992 Tracking filter using self-pumped phase conjugation

Thomas Harrer, Azad Siahmakoun

Proceedings Volume 1779, Optical Design and Processing Technologies and Applications; (1992) https://doi.org/10.1117/12.140951
Event: Optical Engineering Midwest 1992, 1992, Chicago, IL, United States

Abstract

A HeCd laser and a BaTiO₃ crystal were used to obtain a self-pumped phase conjugate beam. This effect is applied to perform an optical tracking filter. A modified liquid crystal television is used to imprint an input image on the laser beam. The input image presents moving and stationary elements of a scenery. The light transmitting through the crystal reveals only the moving elements, whereas the phase conjugate beam only carries the stationary portions of the input image. Therefore, a real time novelty and monotony filter has been realized. There is a lower speed limitation which depends on the response time of the crystal. The high speed limitation is dictated by the electronics. Due to the single-beam requirement of self-pumped phase conjugation, the imaging optical system is simple, making the experimental apparatus compact and versatile. The self-aligning property of self-pumped phase conjugation allows a wide range of incident angles without changing the system performance.

Citation Download Citation

Thomas Harrer and Azad Siahmakoun "Tracking filter using self-pumped phase conjugation", Proc. SPIE 1779, Optical Design and Processing Technologies and Applications, (2 September 1992); https://doi.org/10.1117/12.140951

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