12 January 1993 Optical wavelet transforms using spatial light rebroadcasters
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Abstract
The advantages of a wavelet transform over a short time Fourier transform are explained using 1-D synthetic data in a computer simulation. An optical set up is described in which an electronic analog sensor signal drives an acoustooptic cell that controls the intensity of an Argon laser. A mechanical scanner writes the information as a line onto a spatial light rebroadcaster (SLR) module containing an optical liquid crystal light valve. A lens system expands the line into a 2-D array. A wavelet transform filter is placed in the Fourier transform plane of a 4f correlator. An optical demonstration shows the formation of a wavelet transform and an inverse wavelet transform to reconstruct the original waveform.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alastair D. McAulay, Junqing Wang, Jian Tian Li, "Optical wavelet transforms using spatial light rebroadcasters", Proc. SPIE 1772, Optical Information Processing Systems and Architectures IV, (12 January 1993); doi: 10.1117/12.140912; https://doi.org/10.1117/12.140912
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