Accession Number : ADD014122

Title :   Interferometric Load Sensor and Strain Gage.

Descriptive Note : Patent, Filed 3 Jul 86, patented 28 Mar 89,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Dixon, William P

Report Date : 28 Mar 1989

Pagination or Media Count : 8

Abstract : The invention comprises an interferometric load sensor, or force balance 10 which utilizes etalons 12, 14 to form a reflective cavity 16. A fringe pattern is formed in cavity 16 by light from laser source 26. One of the etalons (14) is mounted to a section 20 that is sensitive to the application of a force 22. Flexing of cantilever 24 due to application of force 22 on section 20 changes the air gap wedge angle between the etalons 12, 14 and thereby shifts the fringe the field formed in cavity 16. The shift in the fringe field is observed by light detectors 30, 32. (jes)

Descriptors :   *STRAIN GAGES, AIR GAPS, ANGLES, DETECTORS, INTERFEROMETRY, PATTERNS, SENSITIVITY, WEDGES

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE