Fiber optic pressure sensor with temperature compensation and reference
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United States of America Patent
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-
Dec 11, 1984
Grant Date -
N/A
app pub date -
Oct 13, 1982
filing date -
Oct 13, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An intravascular catheter tip fiber optic pressure sensor wherein a lens element at the end of the fiber optic collimates the light emanating from the fiber and directs the light in a column towards a closely spaced reflecting diaphragm. The diaphragm is pressure responsive and modulates the focal length of the lens-diaphragm-mirror combination. Three optic fibers traverse the length of the hollow catheter tube, one carrying transmitted light to the tip, one carrying the reflected light from the diaphragm (i.e. the signal), and the third fiber carrying a reflected reference light. The reference detector provides a signal level to control the level of intensity of the light source.
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