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:
Apr. 25, 1995
Filed:
Apr. 29, 1993
Michael S Bielas, Phoenix, AZ (US);
Rudolf C Dankwort, Phoenix, AZ (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A light source with wavelength compensation for a fiber optic rotation sensor includes a light source to provide light for input to the fiber optic rotation sensor. A source control circuit generates a source control signal representative of the temperature of the light source. A driver generates a drive signal as a function of the source control signal to drive the light source. One of a plurality of scale factors for the fiber optic rotation sensor is generated also as a function of the source control signal over a predetermined temperature range. The source control circuit includes a temperature sensor which provides a current signal representative of the temperature of the light source and a buffer network for sinking the current signal and for generating a source control voltage as the source control signal. A method for wavelength compensation of a light source for a fiber optic rotation sensor includes sensing a temperature of the light source and generating a source control signal representative of the temperature. A drive signal is applied to the light source as a function of the source control signal and a scale factor for the fiber optic rotation sensor is generated as a function of the compensation signal.