Acta Optica Sinica, Volume. 9, Issue 12, 1078(1989)
2-Dimensional optical Walsh-Hadamard transform
Based on the equations of the optical transform, phase errors of the holographic lens used in a transform caused by space-transverse-modulation is analysed, and a method of computer generated hologram combined with optical holography is proposed to generate a 2-dimensional (2-D) holographic lens suitable for 2-D transform. The 2-D Walah-Hadamard transform in 32-sequenoe is optically realized. The experimental results are in agreement with the theoretical calculations.
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CHEN YANSONG. 2-Dimensional optical Walsh-Hadamard transform[J]. Acta Optica Sinica, 1989, 9(12): 1078