Fiberoptic pressure transducer
US4787396A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1987 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Jun 18, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/02156
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.