Analysis of a partially coherent optical correlator in the presence of phase defects at the input plane |
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| Affiliation: | 1. School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, China;2. College of Mechanical and Electrical Engineering, Central South University of Forestry and Technology, Changsha, 410004, China |
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| Abstract: | The effects of phase defects at the input plane of an optical correlator on the performance of the system under partially coherent illumination is investigated. The correlation signal-to-noise ratio (SNR) is evaluated as the criterion for the performance of the optical system. We study the effects of both spatially and temporally partially coherent illumination on the distorted correlation signal. It is shown that the output SNR can be increased by relaxing the coherence requirements of the system. The SNR dependence on noise variation is also investigated. It is found that the correlator becomes less sensitive to noise variations under partially coherent illumination. |
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