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Timothy L. Foutz
06-09-1994, 01:01 AM
I recently requested information on a Video Dimension Analyzer. I'd like to
thank Edwin DeMont, Sandy Stewart and Michael Sacks
who provided the following responses.

Timothy L. Foutz, Ph.D.
Biological and Agricultural Engineering
Driftmier Engineering Center
The University of Georgia
Athens, GA 30602
Phone: 706-542-0868 FAX: 706-542-8806

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The Video Dimension Analyzer is produced by:

Instrumention for Physiology and Medicine, INc.
P.O. Box 19206 San Diego Cal
Phone (619) 464-6383.
It costs about 10K. We have one, and use it often. If you have further
questions write to me directly.


Edwin DeMont
Biology Department
St. Francis Xavier University
P.O. Box 5000
Antigonish, N.S.
Canada B2G 2W5

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The following are some companies that make video dimension
analyzers or equivalents. Caveat: some of this information is
five years old or more, but I believe the companies listed still

Video Dimension Analyzers.
Devices from these companies can measure strains on a sample imaged by a
video camera:

Colorado Video
Box 928
Boulder, Colorado 80306

Instrumentation for Physiology and Medicine, Inc.
P.O. Box 19206
San Diego, CA 92119

Scanning laser based:

Self contained diameter guaging units:

Lasermike Division
Techmet Company
6060 Executive Blvd.
Dayton, Ohio 45424

Linear photodiode array based:

Self-contained diameter gaging units (these people also
make more sophisticated noncontacting displacement
followers based on an image vidicon tube, which are a
lot more expensive):

Optron Corp.
30 Hazel Terrace
Woodbridge, CT 06525

Photodiode array cameras that require collimated light
source (can be used in both back-lighted and front-lighted
applications; see SFC Stewart, DJ Lyman, "Solid state line
scan cameras for measuring strain in soft tissues and
implants," Ann Biomed Engr, 1989;17:671-684)

EG&G Reticon
345 Potrero Ave.
Sunnyvale, CA 94086

Sorry I don't have up to date pricing information.

Hope this helps.
Sandy Stewart

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I have used the VDA approach previously, but it has the following
drawbacks: 1) it can only measure on length at a time. 2) it has
a max frame rate of 30hz, 3) its expensive. Try the EG&G line camera(or
equiv.). LIne cameras are not alot cheaper, but then can scan much faster
and can discern many transistions/locations along
the tendon - good for non-uniform strain fields. If you have
any questions - email me at msacks@coeds.eng.miami.edu
Michael Sacks

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