title: Compact optical correlator based on one phase-only spatial light modulator.
abstract: An optical correlator that utilizes one phase-only spatial light modulator (SLM) combined with a mirror is proposed and demonstrated. This system is compressed by displaying the input and filter pattern on different parts of the same SLM. The background noise is separated from the correlation signal by superimposing a high-frequency carrier with the filter pattern except in the zero-frequency regions, which will improve the signal-to-noise ratio in pattern recognition. Our architecture is compact and the cost is relatively low by utilizing only one SLM.
authors.affiliation: State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, Zhejiang, 310027, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Zeng
authors.forename: Jian
authors.initials: J
authors.lastname: Bai
authors.forename: Changlun
authors.initials: C
authors.lastname: Hou
authors.forename: Guoguang
authors.initials: G
authors.lastname: Yang