A HOLOGRAPHIC INTERFEROMETER SPECTROMETER FOR HYPERSONIC FLOW

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: N/A
Agency Tracking Number: 12031
Amount: $49,950.00
Phase: Phase I
Program: SBIR
Awards Year: 1990
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
18006 Skypark Circle #108, Irvine, CA, 92714
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 James D. Trolinger
 Director Research
 (714) 553-0688
Business Contact
 CECIL F. HESS
Title: DIRECTOR OF ENGINEERING
Phone: (714) 553-0688
Research Institution
N/A
Abstract
HOLOGRAPHIC INTERFEROMETRY, WIDELY USED FOR DIAGNOSIS OF FLOW FIELDS, PROVIDES AN INSTANTANEOUS, THREE-DIMENSIONAL DENSITY DISTRIBUTION BY OBSERVATION OF THE FRINGE VARIATIONSOF AN INTERFEROGRAM. WHEN OPTICAL PATH-LENGTH CHANGES ARE MUCH LESS THAN A WAVELENGTH OF LIGHT, THE FLOW FIELD CAN BE EASILY OBSERVED. WHEN OPTICAL PATH-LENGTH CHANGES ARE MUCH LESS THAN A WAVELENGTH OF LIGHT, THE PROBLEM IS COMPLICATED SINCE FRINGE SHIFTS ARE BARELY VISIBLE. A PROBLEM OF CURRENT CRITICAL INTEREST IN AERODYNAMICS IS THE DIAGNOSIS OF HYPERSONIC FLOWS INVOLVING LOW DENSITIES, SHORT PATH- LENGTHS, AND THE MIXING OF FLOWS. AS A RESULT, IMPROVED SENSITIVITY AND THE ABILITY TO DISTINGUISH CONSTITUENTS ARE NEEDED. THIS PROJECT COMBINES UNIQUE AND INNOVATIVE CONCEPTS WITH STATE-OF-THE-ART HARDWARE TO IMPROVE SENSITIVITY AND INFORMATION CONTENT BY ORDERS OF MAGNITUDE OVER CURRENT SYSTEMS. SPECIFICALLY, THE INNOVATIONS INCLUDERECORDING THE FOURIER TRANSFORM AT RESONANCE WITH TURNABLE OR MULTIPLE WAVELENGTH LASERS AND RECONSTRUCTING WITH A NEW PHASE SHIFTING TECHNIQUE. THIS SYSTEM WILL HAVE APPLICATIONS IN INDUSTRIES REQUIRING FLOW DIAGNOSES IN HYPERSONIC WIND TUNNELS, COMBUSTION FACILITIES, AND OTHER TYPES OF TEST FACILITIES.

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

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