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Optical tracking and motion detection using photorefractive Bi12SiO20

Optical tracking and motion detection using photorefractive Bi12SiO20
Optical tracking and motion detection using photorefractive Bi12SiO20
We demonstrate a technique for the differentiation of time varying optical images that exploits the spatial frequency dependent response time of grating formation in photorefractive BSO. The detection characteristics for such a differential signal can be varied via a tunable response time for each arm of a Michelson interferometer arrangement. Experimental results are presented for various rates of change of the input signal by chopping at different speeds, displacing an input transparency, and directional motion of the object. To illustrate this last operation, results are also presented for the Fourier plane of an output image.
0030-4018
138-144
Khoury, J.A.
8b0a4a11-6419-44cf-9aab-f0a8445974a0
Hussain, G.
60f5b057-92d8-4506-a5f2-19eb167e4d8e
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Khoury, J.A.
8b0a4a11-6419-44cf-9aab-f0a8445974a0
Hussain, G.
60f5b057-92d8-4506-a5f2-19eb167e4d8e
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020

Khoury, J.A., Hussain, G. and Eason, R.W. (1989) Optical tracking and motion detection using photorefractive Bi12SiO20. Optics Communications, 71 (3-4), 138-144. (doi:10.1016/0030-4018(89)90415-X).

Record type: Article

Abstract

We demonstrate a technique for the differentiation of time varying optical images that exploits the spatial frequency dependent response time of grating formation in photorefractive BSO. The detection characteristics for such a differential signal can be varied via a tunable response time for each arm of a Michelson interferometer arrangement. Experimental results are presented for various rates of change of the input signal by chopping at different speeds, displacing an input transparency, and directional motion of the object. To illustrate this last operation, results are also presented for the Fourier plane of an output image.

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Published date: 15 May 1989

Identifiers

Local EPrints ID: 435273
URI: http://eprints.soton.ac.uk/id/eprint/435273
ISSN: 0030-4018
PURE UUID: 21e98548-605f-4739-9560-c5f249ce7e02
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

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Date deposited: 29 Oct 2019 17:30
Last modified: 13 Dec 2019 01:39

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