Velocity filtering using complementary gratings in photorefractive BSO
Hussain, G. and Eason, R.W. (1991) Velocity filtering using complementary gratings in photorefractive BSO. Optics Communications, 86, (2), 106-112. (doi:10.1016/0030-4018(91)90543-M).
Download
Full text not available from this repository.
Description/Abstract
We demonstrate a new optical technique for velocity filtering and feature extraction of time varying optical images. The technique exploits the recording of complementary (multiplexed) gratings with a relative phase shift of 180° in a photorefractive material, BSO, via a degenerate four wave mixing (DFWM ) configuration. For experimental parameters, such as grating response time and optimised total input intensity. almost complete subtraction is achieved in the phase conjugate output. When motion occurs in the object plane a bright output image is observed depending on the experimental variables of feature size and velocity. We present results for motion detection of features of various dimensions at a range of speeds in both x and y directions and via Fourier plane observation.
| Item Type: | Article |
|---|---|
| ISSNs: | 0030-4018 (print) |
| Related URLs: | |
| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | University Structure - Pre August 2011 > Optoelectronics Research Centre |
| Item ID: | 78557 |
| Date Deposited: | 11 Mar 2010 |
| Last Modified: | 26 Jul 2012 15:13 |
| Contributors: | Hussain, G. (Author) Eason, R.W. (Author) |
| Date: | 1991 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/78557 |
Actions (login required)
 |
View Item |
