11 November 1998 Lensless spatial filtering using acousto-optic modulators
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Proceedings Volume 3581, Acousto-Optics and Applications III; (1998); doi: 10.1117/12.330508
Event: Acousto-Optics and Applications III, 1998, Gdansk-Jurata, Poland
Abstract
We review the role of acousto-optic (AO) modulators in programmable real-time image processing. Using one AO cell, 1D high pass filtering and edge enhancement has recently been demonstrated. Two AO cells in tandem can be used to remove asymmetries for using one AO cell. We also show notch filtering characteristics of an AO cell by developing a technique to determine the spatial transfer functions numerically for various cases of beam incidence on an AO modulator. Normal incidence and incidence at twice the Bragg angle are investigated as examples.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Partha P. Banerjee, Ting-Chung Poon, "Lensless spatial filtering using acousto-optic modulators", Proc. SPIE 3581, Acousto-Optics and Applications III, (11 November 1998); doi: 10.1117/12.330508; https://doi.org/10.1117/12.330508
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KEYWORDS
Acousto-optics

Adaptive optics

Image processing

Bragg cells

Spatial filters

Diffraction

Modulators

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