半導体レーザーフーリエ変換ディジタルホログラフィによるパターン認識

抄録

Object recognition is performed by a joint-transform phase correlator (JTPC) in which the phase distribution of the joint power spectrum (JPS) is measured by a six phase-shifting laser-diode interferometry technique. The algorithm in six steps is insensitive to power changes in a laser diode. Phase correlation is made by numerically Fourier transforming a measured phase. The correlation peak can be sharpened using the phase difference between two inputs extracted from JPS. The experimental results of single and multiple object recognition with a JTPC are shown.