SYSTEMS AND TECHNIQUES TO DETERMINE WHETHER A SIGNAL IS ASSOCIATED WITH A PERIODIC BIOLOGIC FUNCTION
First Claim
1. A system for determining whether a signal is associated with a periodic biologic function, the system comprising:
- a first light source configured to emit light within a first wavelength light band;
a second light source configured to emit light within a second wavelength light band, the first wavelength light band and the second wavelength light band each reflected differently by oxygenated hemoglobin and reduced hemoglobin;
a light sensor configured to detect light within the first wavelength light band and the second wavelength light band and generate a first signal representative of received light intensity within the first wavelength light band and a second signal representative of received light intensity within the second wavelength light band; and
circuitry configured to correlate the first signal and the second signal to determine whether at least one of the first signal or the second signal is associated with the periodic biologic function.
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Accused Products
Abstract
A system includes a first light source configured to emit light within a first wavelength light band, and a second light source configured to emit light within a second wavelength light band, where the first wavelength light band and the second wavelength light band are each reflected differently by biologic material (e.g., blood). The system also includes a light sensor configured to detect light within the first wavelength light band and the second wavelength light band and generate a first signal representative of received light intensity within the first wavelength light band and a second signal representative of received light intensity within the second wavelength light band. The system further includes circuitry configured to correlate the first signal and the second signal to determine whether at least one of the first signal or the second signal is associated with a periodic biologic function.
20 Citations
20 Claims
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1. A system for determining whether a signal is associated with a periodic biologic function, the system comprising:
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a first light source configured to emit light within a first wavelength light band; a second light source configured to emit light within a second wavelength light band, the first wavelength light band and the second wavelength light band each reflected differently by oxygenated hemoglobin and reduced hemoglobin; a light sensor configured to detect light within the first wavelength light band and the second wavelength light band and generate a first signal representative of received light intensity within the first wavelength light band and a second signal representative of received light intensity within the second wavelength light band; and circuitry configured to correlate the first signal and the second signal to determine whether at least one of the first signal or the second signal is associated with the periodic biologic function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for determining whether a signal is associated with a periodic biologic function, the method comprising:
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generating a first direct current (DC) signal representative of received light intensity within a first wavelength light band at least one of reflected from or transmitted through a biologic material; generating a second DC signal representative of received light intensity within a second wavelength light band at least one of reflected from or transmitted through the biologic material, the first wavelength light band and the second wavelength light band each reflected differently by the biologic material; and correlating the first DC signal and the second DC signal to determine whether at least one of the first DC signal or the second DC signal is associated with the periodic biologic function. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for determining whether a signal is associated with a heartbeat, the system comprising:
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a first light source configured to emit light within a visible red light band; a second light source configured to emit light within an infrared light band; a light sensor configured to detect light within the visible red light band and the infrared light band and generate a first signal representative of received light intensity within the visible red light band and a second signal representative of received light intensity within the infrared light band; and circuitry configured to correlate the first signal and the second signal to determine whether at least one of the first signal or the second signal is associated with the heartbeat. - View Dependent Claims (20)
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Specification