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:
Sep. 13, 1994
Filed:
Jan. 28, 1993
Applicant:
Inventor:
Charles E Nourrcier, Jr, Lakewood, CA (US);
Assignee:
Hughes Aircraft Company, Los Angeles, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01C / ; G02B / ; G02F / ;
U.S. Cl.
CPC ...
356-5 ; 356 285 ; 359239 ; 359278 ;
Abstract
A power beam tube is biased to supply a constant current to an EO crystal used as part of a frequency modulation circuit for FM laser radar. Integration of the constant current by the EO crystal's capacitance generates the desired ramp voltage waveform. A correction current is easily added to the circuit. The circuit effectively removes the EO crystal driver circuitry from the control loop, increasing the speed of the frequency modulator loop about ten times.