Claims
- 1. An optical probe for non-invasive measurement of characteristics of a medium, said optical probe comprising:
- an emitter which transmits optical radiation;
- a detector configured to detect said optical radiation transmitted by said emitter and attenuated by said medium;
- a flexible circuit assembly extending between said emitter and said detector, said flexible circuit assembly having electrical circuit paths connecting to said emitter and said detector; and
- a substrate forming a surface of said flexible circuit assembly said substrate having an optical obstruction in the path along said surface between said emitter and said detector to reduce light piping between said emitter and said detector, said optical obstruction comprising an aperture through said flexible circuit and said substrate, said aperture configured to receive a fingertip when said optical probe is affixed to a finger, said aperture stabilizing said finger within said optical probe so as to reduce optical decoupling between said emitter and said detector.
- 2. The optical probe of claim 1, further comprising a flexible backing supporting said flexible circuit, said flexible backing adapted to affix said optical probe to said medium.
- 3. The optical probe of claim 1, further comprising an optical cavity containing said detector.
Parent Case Info
This application is a continuation-in-part of Ser. No. 08/333,132, filed Nov. 1, 1994, now U.S. Pat. No. 5,638,818 and which is a continuation-in-part of U.S. Ser. No. 07/672,890, filed Mar. 21, 1991 now abandoned.
US Referenced Citations (25)
Foreign Referenced Citations (2)
Number |
Date |
Country |
89105503 |
Aug 1983 |
EPX |
01894 |
Mar 1992 |
WOX |
Continuation in Parts (2)
|
Number |
Date |
Country |
Parent |
333132 |
Nov 1994 |
|
Parent |
672890 |
Mar 1991 |
|