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, Alastair D. McAulay, Junqing Wang, Junqing Wang, Jian Tian Li, 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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