NOISE SHIELDING FOR A NONINVAISE DEVICE
First Claim
1. An optical medical sensor configured to detect light attenuated by body tissue of a patient, the sensor comprising:
- a sensor housing comprising a first shell and a second shell pivotally connected together, the first and second shells each shaped to accept body tissue of a medical patient;
an emitter disposed in the first shell, the emitter configured to emit light on the body tissue of the medical patient;
a detector disposed in the second shell, the detector configured to receive light attenuated by the body tissue along an optical path; and
shielding disposed between the emitter and the detector, the shielding comprising a substantially-transparent, electrically-conductive material in the optical path.
2 Assignments
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Accused Products
Abstract
A noninvasive physiological sensor for measuring one or more physiological parameters of a medical patient can include a bump interposed between a light source and a photodetector. The bump can be placed in contact with body tissue of a patient and thereby reduce a thickness of the body tissue. As a result, an optical pathlength between the light source and the photodetector can be reduced. In addition, the sensor can include a heat sink that can direct heat away from the light source. Moreover, the sensor can include shielding in the optical path between the light source and the photodetector. The shielding can reduce noise received by the photodetector.
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Citations
20 Claims
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1. An optical medical sensor configured to detect light attenuated by body tissue of a patient, the sensor comprising:
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a sensor housing comprising a first shell and a second shell pivotally connected together, the first and second shells each shaped to accept body tissue of a medical patient; an emitter disposed in the first shell, the emitter configured to emit light on the body tissue of the medical patient; a detector disposed in the second shell, the detector configured to receive light attenuated by the body tissue along an optical path; and shielding disposed between the emitter and the detector, the shielding comprising a substantially-transparent, electrically-conductive material in the optical path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A conductive shield configured to shield noise interference from a light sensitive detector, the shield comprising:
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a substantially transparent material; and a conductive material disposed on at least a portion of the substantially transparent material; wherein the conductive shield is configured to be positioned between a light source and a light detector such that at least some light from said light source passes through said conductive shield and impinges on said light detector. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A system for shielding one or more photocommunicative devices, comprising:
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an emitter configured to emit optical radiation; a detector; and a shielding device disposed between the emitter and the detector, the shielding device comprising a substantially-transparent, electrically-conductive material, the shielding device configured to pass at least a portion of the optical radiation to the detector and to reduce a noise received by the detector. - View Dependent Claims (19, 20)
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Specification