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:
Aug. 20, 1985
Filed:
Aug. 29, 1983
Clarence W Barnes, San Francisco, CA (US);
Axonics, Inc., Mt. View, CA (US);
Abstract
A fluorometer system is disclosed in which a carousel-like system is rotated by a stepper motor to provide a sequence of sample wells to a single optical exciting path. An ultraviolet tube positioned adjacent that path provides an excitation beam which is reflected into common optical path which coincides with the position of the well along the common path is deflected by a beam splitter or the like through an appropriate filtering device to a photomultiplier tube which is located adjacent the common light path on the same side of the path as the ultraviolet tube. The photomultiplier tube is located below the ultraviolet tube to provide a proper direction of convection current. Further, a solid state photosensor sensitive in red spectrum such as a phototransistor or photodiode is provided adjacent the ultraviolet tube, with a ruby positioned between the ultraviolet tube and the photosensor the take advantage of the fact that solid-state photosensors are especially responsive to light in the red range. The output of the photosensor is fed back to the A to D converter and microprocessor software to take account for the fact that with tube aging or fluctuation in the line current, the output of the ultraviolet tube may vary.