FILTERED DETECTOR ARRAY FOR OPTICAL PATIENT SENSORS
First Claim
1. A physiological sensor, comprising:
- an emitter configured to emit two or more wavelengths of light into the tissue of a patient;
a charge coupled device (CCD) or complementary metal-oxide semiconductor (CMOS) photodetector array comprising a plurality of photodetectors, wherein each photodetector is configured to receive the light from the tissue of the patient and to produce a corresponding output signal; and
one or more filter layers disposed on the plurality of photodetectors and configured to only allow light of particular wavelengths, polarizations, or both, to be received by each of the plurality of photodetectors.
2 Assignments
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Accused Products
Abstract
The present embodiments relate generally to patient monitoring system and, more particularly, to optical patient monitoring systems. In an embodiment, a physiological sensor includes a broadband emitter configured to emit two or more wavelengths of light into the tissue of a patient. The sensor also includes a charge coupled device (CCD) or complementary metal-oxide semiconductor (CMOS) photodetector array comprising a plurality of photodetectors. Each photodetector in the photodetector array is configured to receive the light from the tissue of the patient and to produce a corresponding output signal. Additionally, the sensor also includes one or more filter layers disposed on the plurality of photodetectors. The filter layers are configured to only allow light of particular wavelengths, polarizations, or both, to be received by each of the plurality of photodetectors.
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Citations
20 Claims
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1. A physiological sensor, comprising:
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an emitter configured to emit two or more wavelengths of light into the tissue of a patient; a charge coupled device (CCD) or complementary metal-oxide semiconductor (CMOS) photodetector array comprising a plurality of photodetectors, wherein each photodetector is configured to receive the light from the tissue of the patient and to produce a corresponding output signal; and one or more filter layers disposed on the plurality of photodetectors and configured to only allow light of particular wavelengths, polarizations, or both, to be received by each of the plurality of photodetectors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of measuring a physiological parameter of a patient comprising:
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emitting light into a tissue of the patient using a broadband emitter; filtering the light received from the tissue of the patient using one or more filters configured to block a portion of the light based on either the wavelength of the light, the polarization of the light, or both; and measuring the light that traverses the one or more filters using a charge-coupled device (CCD) or complementary metal-oxide semiconductor (CMOS) detector array comprising a plurality of photodetectors. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A patient monitoring system comprising:
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an optical patient sensor comprising; a broadband emitter configured to emit light over a range of wavelengths into the tissue of a patient; and a filtered charge-coupled device (CCD) or complementary metal-oxide semiconductor (CMOS) detector array comprising a plurality of photodetectors disposed beneath one or more filters, wherein the plurality of photodetectors is configured to receive a filtered portion of the light from the tissue and produce corresponding plurality of output signals, wherein the filtered portion of the light comprises light having a particular wavelength, polarization, or both; and a patient monitor comprising a processor configured to; receive the plurality of output signals from the plurality of photodetectors; and calculate a physiological parameter of the patient based, at least in part, on the received plurality of output signals. - View Dependent Claims (17, 18, 19, 20)
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Specification