Multitarget detection using a hybrid optical joint transform correlator with power spectrum subtraction

In order to improve the correlation performance of the hybrid optical joint transform correlator (JTC), a hybrid optical JTC with power spectrum subtraction was proposed. This architecture is a programmable single spatial light modulator JTC, which consists of a liquid crystal display panel, an imaging lens, and a liquid crystal light valve to enhance resolution and space-bandwidth production. This technique yields better correlation output performance than that of the classical JTC for multiple object input scene. Computer simulation results and the optical experimental results for input scene of the multitarget were given. The results have verified the correctness of the system design and performance analysis.