MULTI-STREAM EMITTER FOR NONINVASIVE MEASUREMENT OF BLOOD CONSTITUENTS
First Claim
1. A multi-stream emitter for a noninvasive, physiological device configured to transmit optical radiation in a tissue site, said emitter comprising:
- a set of optical sources arranged as a point optical source; and
a driver configured to drive the at least one light emitting diode and at least one optical source to transmit near-infrared optical radiation at sufficient power to measure an analyte in tissue that responds to near-infrared optical radiation.
2 Assignments
0 Petitions
Accused Products
Abstract
The present disclosure relates to an emitter that is suitable for a noninvasive blood constituent sensor. The emitter is configured as a point optical source that comprises a plurality of LEDs that emit a sequence of pulses of optical radiation across a spectrum of wavelengths. In some embodiments, the plurality of sets of optical sources may each comprise at least one top-emitting LED and at least one super luminescent LED. In some embodiments, the emitter comprises optical sources that transmit optical radiation in the infrared or near-infrared wavelengths suitable for detecting glucose. In order to achieve the desired SNR for detecting analytes like glucose, the emitter may be driven using a progression from low power to higher power. In addition, the emitter may have its duty cycle modified to achieve a desired SNR.
117 Citations
33 Claims
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1. A multi-stream emitter for a noninvasive, physiological device configured to transmit optical radiation in a tissue site, said emitter comprising:
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a set of optical sources arranged as a point optical source; and a driver configured to drive the at least one light emitting diode and at least one optical source to transmit near-infrared optical radiation at sufficient power to measure an analyte in tissue that responds to near-infrared optical radiation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An emitter for a noninvasive, physiological device configured to transmit optical radiation in a tissue site, said emitter comprising:
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a point optical source comprising an optical source configured to transmit infrared and near-infrared optical radiation to a tissue site; and a driver configured to drive the point optical source at a sufficient power and noise tolerance to effectively provide attenuated optical radiation from a tissue site that indicates an amount of glucose in the tissue site. - View Dependent Claims (14, 15)
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16. A method of transmitting a stream of pulses of optical radiation in a tissue site, said method comprising:
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transmitting, at a first power, at least one pulse of infrared optical radiation having a first pulse width; and transmitting, at a second power that is higher than the first power, at least one pulse of near-infrared optical radiation. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A method of transmitting a stream of pulses of optical radiation in a tissue site, said method comprising:
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transmitting, at a first power, at least one pulse of infrared optical radiation having a first pulse width; and transmitting, at a second power that is higher than the first power, at least one pulse of near-infrared optical radiation. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification