Uniaxially collimated light source for optical shaft angle encoders

An optical shaft angle encoder uses novel slit emitters having a long, narrow, configuration coupled with collimation lenses to utilize emitted light beams having an improved degree of collimation in an axis perpendicular to radial axes of a rotating code wheel and, thereby, to provide a higher qual...

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Bibliographische Detailangaben
Hauptverfasser:	CASCIANI, JAMES R
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS BASIC ELECTRIC ELEMENTS BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DECODING ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS SEMICONDUCTOR DEVICES TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	An optical shaft angle encoder uses novel slit emitters having a long, narrow, configuration coupled with collimation lenses to utilize emitted light beams having an improved degree of collimation in an axis perpendicular to radial axes of a rotating code wheel and, thereby, to provide a higher quality generated electrical waveform which is used to describe shaft rotation. The slit emitters are narrowed to improve collimation uniaxially and lengthened to increase the total power of the emitted light.