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:
Feb. 06, 1990
Filed:
Jan. 21, 1988
Applicant:
Inventor:
Harley A Perkins, Brookline, MA (US);
Assignee:
Northrop Corporation, Hawthorne, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 32 ; 372 20 ; 372 23 ; 372 33 ; 372 37 ; 372 94 ; 356350 ;
Abstract
Path length error is computed from the output frequencies for the two states of magnetization of the magnetic mirror. The path length error signal is used to adjust the location of a path length control mirror to drive the path length error signal to zero. A table is provided for computing the path length control error signal for different regions in the graph of frequency versus gyro angular rate. In effect, the error signal is the difference between a reference frequency which depends on the temperature of the laser structure and an average of the output frequencies corresponding to the two magnetization states of the magnetic mirror.