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:
Nov. 29, 1988
Filed:
Jun. 18, 1987
John Pidorenko, Ypsilanti, MI (US);
Fiberoptic Sensor Technologies, Inc., Ann Arbor, MI (US);
Abstract
A miniaturized pressure transducer, particularly suited for intravascular blood pressure measurement, utilizing a single optical fiber for transmitting light both to and from a flexible diaphragm having a light-reflecting surface on one side, the opposite side being exposed to and deflected in accordance with the pressure being measured. The end of the fiber through which light is transmitted to and reflected light received from the diaphragm is ground to form a spherical lens integral with the fiber, whereby light passing through the end of the fiber is focused at a predetermined focal point. The fiber is axially positioned so that the center of the diaphragm, which coincides with the lens axis, is at the focal point when the diaphragm is at maximum deflection, i.e., when its opposite surface is exposed to a predetermined, maximum anticipated pressure.