All optical phase-only filtering correlation with binarized inputs by a ferroelectric liquid-crystal spatial light modulator

作者：Takahashi Takeshi^*; Ishii Yukihiro

来源：Optical Review, 2010, 17(3): 195-203.

DOI：10.1007/s10043-010-0035-2

• ferroelectric spatial light modulator
• binarization procedure
• correlation performance
• phase-only filter
• real-time optical processing

All optical phase-only filtering correlator is constructed with an optically addressed ferroelectric liquid-crystal spatial light modulator (FSLM) for a binarized input object and a twisted-nematic liquid-crystal spatial-light modulator for a computer-generated phase-only filter. In order to improve the discrimination capability of a phase-only filtering correlator, a binarized amplitude with maximum contrast in a FSLM is used for an object input. The contrast of binarized intensities can be maximized by adjusting the rotation angles of a FSLM and polarizers. The threshold level of binarized input objects can be controlled by changing the power of a laser incident on a FLSM. Experimental results with a high discrimination capability are presented to support the numerical correlation performance.

• 出版日期2010-5