Optics: measuring and testing – Refraction testing
Patent
1996-07-08
1998-02-03
Rosenberger, Richard A.
Optics: measuring and testing
Refraction testing
356129, G01N 2141
Patent
active
057150478
ABSTRACT:
A scanning mode sensor and method is provided for detection of flow inhomogeneities such as shock. The field of use of this invention is ground test control and engine control during supersonic flight.
Prior art measuring techniques include interferometry, Schlieren, and shadowgraph techniques. These techniques, however, have problems with light dissipation.
The present method and sensor utilizes a pencil beam of energy which is passed through a transparent aperture in a flow inlet in a time-sequential manner so as to alter the energy beam. The altered beam or its effects are processed and can be studied to reveal information about flow through the inlet which can in turn be used for engine control.
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Proceedings of The International Society for Optical Engineering . . . San Diego, CA "Optical techniques for shock visualization and detection" G. Adamovsky . . . Jul. 10-13, 1995.
Reinecke Susan D.
Rosenberger Richard A.
Stone Kent N.
The United States of America as represented by the Administrator
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