Hologram for IR optical modulation

Wei-Feng Lin; Chii-Maw Uang

doi:10.1117/12.235663

15 March 1996 Hologram for IR optical modulation

Wei-Feng Lin, Chii-Maw Uang

Proceedings Volume 2752, Optical Pattern Recognition VII; (1996) https://doi.org/10.1117/12.235663
Event: Aerospace/Defense Sensing and Controls, 1996, Orlando, FL, United States

Abstract

An infrared optical modulation using associative memory technique is addressed. The proposed holographic associative memory is used to replace the optical modulator (reticle) by using a Fourier hologram. The target radiant flux is collected by optical system. A hologram is inserted in the optical path between the optical lens of the optical system and the detector in the focal plane of the lens. When the IR fluxes illuminate the hologram, the hologram redirects the flux to the desired direction. After the energy transferred by the detector arrays, we can get the codes, corresponding to the position of target, from the output of detector arrays by particular arrangement of the redirected radiant flux. Thus, generating the electric signal corresponding to target position in the IR tracking system by optical signal processing becomes easy and effective. Besides providing directional information, it can also be used for background suppression. By use of the optical signal processing and neuron network theorem, the background radiation of the IR system can be suppressed effectively.

Citation Download Citation

Wei-Feng Lin and Chii-Maw Uang "Hologram for IR optical modulation", Proc. SPIE 2752, Optical Pattern Recognition VII, (15 March 1996); https://doi.org/10.1117/12.235663

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