Multiple wavelength sensor substrate
CAFCFirst Claim
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1. A physiological sensor comprising:
- a plurality of emitters configured to transmit optical radiation having a plurality of wavelengths in response to a corresponding plurality of drive currents, the plurality of emitters including a substrate;
a thermal mass disposed proximate the emitters and within the substrate so as to stabilize a bulk temperature for the emitters; and
a temperature sensor thermally coupled to the thermal mass,wherein the temperature sensor provides a temperature sensor output responsive to the bulk temperature so that the wavelengths are determinable as a function of the drive currents and the bulk temperature.
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Abstract
A physiological sensor has emitters configured to transmit optical radiation having multiple wavelengths in response to corresponding drive currents. A thermal mass is disposed proximate the emitters so as to stabilize a bulk temperature for the emitters. A temperature sensor is thermally coupled to the thermal mass. The temperature sensor provides a temperature sensor output responsive to the bulk temperature so that the wavelengths are determinable as a function of the drive currents and the bulk temperature.
1165 Citations
30 Claims
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1. A physiological sensor comprising:
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a plurality of emitters configured to transmit optical radiation having a plurality of wavelengths in response to a corresponding plurality of drive currents, the plurality of emitters including a substrate; a thermal mass disposed proximate the emitters and within the substrate so as to stabilize a bulk temperature for the emitters; and a temperature sensor thermally coupled to the thermal mass, wherein the temperature sensor provides a temperature sensor output responsive to the bulk temperature so that the wavelengths are determinable as a function of the drive currents and the bulk temperature. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A physiological sensor capable of emitting light into tissue and producing an output signal usable to determine one or more physiological parameters of a patient, the physiological sensor comprising:
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a thermal mass; a plurality of light emitting sources, including a substrate of the plurality of light emitting sources, thermally coupled to the thermal mass, the sources having a corresponding plurality of operating wavelengths, the thermal mass disposed within the substrate; a temperature sensor thermally coupled to the thermal mass and capable of determining a bulk temperature for the thermal mass, the operating wavelengths dependent on the bulk temperature; and a detector capable of detecting light emitted by the light emitting sources after tissue attenuation, wherein the detector is capable of outputting a signal usable to determine one or more physiological parameters of a patient based upon the operating wavelengths. - View Dependent Claims (8, 9, 10, 11, 12)
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13. In a physiological sensor adapted to determine a physiological parameter using a plurality of light emitting sources with emission wavelengths affected by one or more dynamic operating parameters, a sensor method comprising:
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providing a thermal mass disposed within the substrate proximate the light emitting sources and a temperature sensor thermally coupled to the thermal mass; transmitting optical radiation from the plurality of light emitting sources into body tissue; detecting the optical radiation after tissue attenuation; and determining a plurality of operating wavelengths of the light emitting sources dependent on a bulk temperature of the light emitting sources so that one or more physiological parameters of a patient can be determined based upon the operating wavelengths. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. In a physiological sensor adapted to determine a physiological parameter using a plurality of light emitting sources with emission wavelengths affected by one or more dynamic operating parameters, a sensor method comprising:
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providing a thermal mass disposed within a substrate of the light emitting sources and a temperature sensor thermally coupled to the thermal mass; transmitting optical radiation from the plurality of light emitting sources into body tissue; detecting the optical radiation after tissue attenuation; and indicating an operating wavelength for each of the plurality of light emitting sources. - View Dependent Claims (21, 22, 23, 24, 25)
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26. A physiological sensor comprising:
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a plurality of emitters configured to transmit optical radiation having a plurality of wavelengths in response to a corresponding plurality of drive currents; a thermal mass disposed proximate the emitters and within a substrate so as to stabilize a bulk temperature for the emitters; and a temperature sensor thermally coupled to the thermal mass, wherein the temperature sensor provides a temperature sensor output responsive to the bulk temperature so that the wavelengths are determinable as a function of the drive currents and the bulk temperature; a substrate having a top side and a bottom side, wherein the emitters are mounted to the top side, and wherein the temperature sensor is mounted to the bottom side. - View Dependent Claims (27, 28, 29, 30)
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Specification