The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 1980
Filed:
Jul. 02, 1979
Applicant:
Inventor:
Clifford G Walker, Huntsville, AL (US);
Assignee:
Other;
Primary Examiner:
Int. Cl.
CPC ...
G01P / ; G01B / ;
U.S. Cl.
CPC ...
7351 / ; 356 33 ;
Abstract
An accelerometer utilizing a laser source and a resonant cavity formed by a pair of spaced mirrors. A birefringent isotropic material is disposed in the resonant cavity. Light generated by the laser is reflected back and forth between the mirrors and through the birefringent material to generate a pair of orthogonally polarized beams. The optical path of one beam is changed in response to acceleration forces acting on a proof mass carried on the birefringent material. The pair of beams produced have different phases. The phase difference will be by an amount proportional to the difference in refractive indexes along and perpendicular to the optic axis of the birefringent material.