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SPECTRAL CONTENTS READOUT OF BIREFRINGENT SENSORS

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 2852
Amount: $200,000.00
Phase: Phase II
Program: SBIR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Timeline
Solicitation Year: N/A
Award Year: 1987
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
21 Terrace Rd
Norristown, PA 19401
United States
DUNS: N/A
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Alex S Redner
 Principal Investigator
 () -
Business Contact
Phone: () -
Research Institution
N/A
Abstract

A TRANSPARENT MATERIAL SUBJECTED TO STRESSES BECOMES BIREFRIGENT, PRODUCING A RELATIVE RETARDATION BETWEEN ORTHOGONALLY POLARIZED RAYS THAT IS PROPORTIONAL TO THE STRAINS. IN PHOTOELASTICITY, THIS RETARDATION IS MEASURED VISUALLY, USING A VARIETY OF COMPENSATORS, OR AUTOMATICALLY,USING COMPLEX ANALYZER ROTATORS OR ELECTRO-OPTICAL MODULATORS, LIMITED TO SMALL RETARDATION LEVELS. IN THE SPECTRAL CONTENTS APPROACH PROPOSED BY THIS RESEARCH,THE TRANSMITTED LIGHT INTENSITY IS MEASURED AT SEVERAL DISCRETE WAVELENGTHS, AND THE RESULTING SPECTRAL SIGNATURE IS INTERPRETED BY A MICROPROCESSOR IN TERMS OF THE MEASURED RETARDATION AND STRESS. THE RESULTING BIREFRINGENT SENSOR - SPECTRAL ANALYZER SYSTEMPERMITS A NONCONTACTING METHOD OF STRAIN MEASUREMENTS, WITH THE ABILITY OF CARRYING THE SIGNAL TO A REMOTE LOCATION, USING FIBER-OPTIC CABLES. THE PROPOSED RESEARCH EXTENDS THERANGE OF STRAIN MEASURMENTS TO HIGH TEMPERATURES.

* Information listed above is at the time of submission. *

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