LIGHT GUIDE SYSTEM FOR PHYSIOLOGICAL SENSOR
First Claim
1. A light guide system for a physiological sensor having an emitter and a detector, the light guide system comprising a pair of light channels, each of the light channels formed of a bio-compatible resilient plastic and configured for contact with the skin of a wearer, one of the light channels being in optical communication with the emitter and the other light channel being in optical communication with the detector, the bio-compatible resilient plastic having an optical transmission spectrum that transmits the optical energy of the emitter and substantially blocks ambient light.
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Accused Products
Abstract
A light guide system for a physiological sensor includes a light channel in optical communication with an emitter and a light channel in optical communication with a detector. The light channels are formed of a bio-compatible resilient plastic, such as a silicone, that is blended with a colorant. Each light channel has an optical transmission spectrum that passes the emitter spectral band and rejects most or all ambient light. The colorant can be a pigment provided as a suspension in a liquid or a dye provided in liquid form. The optical transmission spectrum defines a longpass optical filter where the shortest wavelength of the optical spectrum of the emitter is greater than the transition wavelength of the longpass optical filter. Each of the light channels is configured to be in contact with the skin, thereby reducing or eliminating optical loss due to transmission through an air gap.
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Citations
24 Claims
- 1. A light guide system for a physiological sensor having an emitter and a detector, the light guide system comprising a pair of light channels, each of the light channels formed of a bio-compatible resilient plastic and configured for contact with the skin of a wearer, one of the light channels being in optical communication with the emitter and the other light channel being in optical communication with the detector, the bio-compatible resilient plastic having an optical transmission spectrum that transmits the optical energy of the emitter and substantially blocks ambient light.
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15. A physiological sensor comprising:
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a sensor body; an emitter disposed in the sensor body and configured to irradiate a skin of a wearer with an optical beam; a detector disposed in the sensor body and configured to receive optical energy from the irradiated skin of the wearer and to generate an electrical signal in response to the received optical energy; a processor in communication with the detector and configured to determine physiological data for the wearer in response to the electrical signal; and a pair of light channels each formed of a bio-compatible conformable plastic and configured for contact with the skin of the wearer, one of the light channels being in optical communication with the emitter and the other light channel being in optical communication with the detector, the bio-compatible conformable plastic having an optical transmission spectrum that transmits the optical energy of the emitter and substantially blocks ambient light. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A light guide system for a physiological sensor comprising:
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an emitter configured to irradiate a skin of a wearer with an optical beam; a detector configured to receive optical energy from the irradiated skin of the wearer and to generate an electrical signal in response to the received optical energy; and an eartip having an eartip body and a pair of light channels integrally molded into the eartip body, each of the light channels formed of a bio-compatible resilient plastic and configured for contact with the skin of a wearer, one of the light channels being in optical communication with the emitter and the other light channel being in optical communication with the detector, the bio-compatible resilient plastic having an optical transmission spectrum that transmits the optical energy of the emitter and substantially blocks ambient light. - View Dependent Claims (22, 23, 24)
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Specification