用于模式识别的一种新的光学相关器

A New Optical Correlator for Pattern Recognition

我们研究了一种新的白光联合变换相关器，即在频谱面上利用液晶光阀对联合傅氏干涉谱进行变换，然后用白光做为液晶光阀的读出光，实现相关变换。利用部份相干光传播模式，导出这种白光联合相关器保留了对复振幅的线性运算能力，结果表明，这种相关器能得到较好的相关结果，并能有效地抑制相干噪声。

A new white light Joint transform correlator ( WLJTC) is investigated, i.e. Joint power spectrum is transformed by using LCLV in the Fourier plane. White light is used as the LCLV's read-out light and then the correlative results are given by Fourier transform. By using the partial coherent light transmission mode, we derive that the WLJTC remains the linear computation of the complex amplitude. Correlative experiments show that the WLJTC can produce good correlative performance and can restrict coherent noise in effect.