Optical wavelet transforms using spatial light rebroadcasters

Alastair D. McAulay; Junqing Wang; Jian Tian Li

doi:10.1117/12.140912

12 January 1993 Optical wavelet transforms using spatial light rebroadcasters

Alastair D. McAulay, Junqing Wang, Jian Tian Li

Proceedings Volume 1772, Optical Information Processing Systems and Architectures IV; (1993) https://doi.org/10.1117/12.140912
Event: San Diego '92, 1992, San Diego, CA, United States

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.

Citation Download Citation

Alastair D. McAulay, Junqing Wang, and Jian Tian Li "Optical wavelet transforms using spatial light rebroadcasters", Proc. SPIE 1772, Optical Information Processing Systems and Architectures IV, (12 January 1993); https://doi.org/10.1117/12.140912

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KEYWORDS

Wavelet transforms

Wavelets

Fourier transforms

Computer simulations

Filtering (signal processing)

Signal processing

Acousto-optics

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