Digital Refractometry of Piezoelectric Crystalline Media

Period of Performance: 01/01/1987 - 12/31/1987

$488K

Phase 2 SBIR

Recipient Firm

Measurement Concepts, Inc.
41 Hwy 34 South - Colts Towne Plaza
Colts Neck, NJ 07722
Principal Investigator

Abstract

THIS PROPOSAL DESCRIBES A PHASE II DOD SBIR PROGRAM TO CONTINUE AND EXPAND A NOVEL TECHNIQUE FOR MEASURING THE REFRACTIVE INDICES OF UNIAXIAL (PIEZOELECTRIC) CRYSTALS. DURING PHASE I WE DEVELOPED AND IMPROVED THIS METHOD WHICH WE CALL DUAL-BEAM DIGITAL REFRACTOMETRY. BY FOLLOWING A DUAL-BEAM CONFIGURATION WE SHOW THAT IT IS POSSIBLE TO OVERCOME 1) THE OPTICAL SOURCE FLUCTUATIONS, 2) THE DETECTOR SENSITIVITY OVER A SPECTRAL RANGE AND 3) OBTAIN THE THEORETICAL LIMIT OF ACCURACY. THE PROPOSED EXPERIMENTAL CONFIGURATION IN PHASE II CONTAINS NO MOVING PARTS. A MATHEMATICAL ANALYSIS OF DIGITAL REFRACTOMETRY IS MADE ALONG WITH AN ANALYSIS OF THE EXPERIMENTAL CONFIGURATION.