Optical sensor device
An optical channel, of an optical filter, passes light associated with a particular wavelength range to a sensor element, of an optical sensor, that operates in a gated mode. One or more processors obtain, from the optical sensor, a first optical measurement and a second optical measurement related to a multi-layered subject. The first optical measurement indicates an amount of light associated with the particular wavelength range that the sensor element accumulated during a first time range, and the second optical measurement indicates an amount of light associated with the particular wavelength range that the sensor element accumulated during a second time range. The first time range is a subrange of the second time range. The one or more processors process the first optical measurement and the second optical measurement to determine one or more parameters associated with the multi-layered subject.
1 . An optical sensor device, comprising:
an optical sensor comprising an array of sensor elements and configured to provide optical measurements, related to light associated with a particular wavelength range that has propagated through a multi-layered subject, at time intervals of less than 10 nanoseconds;
an optical filter disposed over the optical sensor,
wherein the optical filter is configured to pass the light associated with the particular wavelength range to a sensor element of the array; and
one or more processors configured to:
obtain, from the optical sensor and at the time intervals of less than 10 nanoseconds, the optical measurements,
wherein the optical measurements include a first optical measurement and a second optical measurement,
wherein the first optical measurement indicates a first amount of the light associated with the particular wavelength range that the sensor element accumulated during a first time range, and
wherein the second optical measurement indicates a second amount of the light associated with the particular wavelength range that the sensor element accumulated during a second time range,
wherein the first time range is a subrange of the second time range;
process the first optical measurement to determine one or more first characteristics associated with a first layer of the multi-layered subject;
process a difference between the first optical measurement and the second optical measurement to determine one or more second characteristics associated with a second layer of the multi-layered subject; and
provide, based on the one or more first characteristics and the one or more second characteristics, information indicating one or more parameters associated with the multi-layered subject.
2 . The optical sensor device of claim 1 , wherein a difference between an ending time of the first time range and an ending time of the second time range is less than 10 nanoseconds.
3 . The optical sensor device of claim 1 , wherein the optical sensor comprises:
a photodiode configured to capture the light associated with the particular wavelength range and generate a photocurrent;
a storage diode configured to accumulate a charge associated with the photocurrent generated by the photodiode;
one or more gates configured to transfer the accumulated charge from the storage diode to a converter,
wherein the one or more gates are configured to transfer the accumulated charge based on a transfer cycle with a period that is less than 10 nanoseconds; and
the converter, wherein the converter is configured to convert the accumulated charge to an optical measurement.
4 . The optical sensor device of claim 1 , wherein the multi-layered subject comprises multi-layered tissue of a human body, and
wherein the one or more parameters associated with multi-layered subject comprise one or more health parameters associated with the human body.
5 . The optical sensor device of claim 1 , wherein, to provide the information indicating the one or more parameters, the one or more processors are configured to:
provide, based on the one or more first characteristics and the one or more second characteristics, information indicating five or more of:
a cardiac output parameter;
a respiration rate parameter;
a vascular disease parameter;
an arterial compliance parameter;
an endothelial function parameter;
a venous condition assessment parameter;
a vasospastic condition parameter;
a microvascular flow parameter;
a tissue viability parameter;
an autonomic function parameter;
a vasomotor function parameter;
a thermoregulation parameter;
an orthostasis parameter;
a vasoconstriction parameter;
a body fat composition parameter;
a food sensitivity response parameter;
a pharmaceutical sensitivity response parameter;
a skin coloring or tanning response parameter;
an electrolyte level parameter;
a carbon monoxide level parameter;
a hydration level parameter;
a blood glucose level parameter;
a blood pressure parameter;
a blood oxygen parameter; or
a heart rate parameter.
6 . The optical sensor device of claim 1 , wherein the one or more processors, when providing the information indicating the one or more parameters associated with the multi-layered subject, are configured to:
cause display of the information indicating the one or more parameters associated with the multi-layered subject on a display screen associated with the optical sensor device.
7 . The optical sensor device of claim 1 , wherein the optical filter includes an optical channel that is disposed over the sensor element and is configured to prevent light associated with at least one other wavelength range from passing to the sensor element.
8 . A method, comprising:
providing, by an optical sensor of an optical sensor device comprising an array of sensor elements, optical measurements, related to light associated with a particular wavelength range that has propagated through a multi-layered subject, at time intervals of less than 10 nanoseconds, wherein an optical filter is disposed over the optical sensor and is configured to pass the light associated with the particular wavelength range to the array of sensor elements;
processing, by the optical sensor device, a first optical measurement of the optical measurements to determine one or more first characteristics associated with a first layer of the multi-layered subject,
wherein the first optical measurement indicates a first amount of the light associated with the particular wavelength range and accumulated during a first time range;
processing, by the optical sensor device, a second optical measurement of the optical measurements to determine one or more second characteristics associated with a second layer of the multi-layered subject,
wherein the second optical measurement indicates a second amount of the light associated with the particular wavelength range and accumulated during a second time range, and
wherein the first time range is a subrange of the second time range; and
providing, by the optical sensor device and based on the one or more first characteristics and the one or more second characteristics, information indicating one or more parameters associated with the multi-layered subject.
9 . The method of claim 8 , wherein a difference between an ending time of the first time range and an ending time of the second time range is less than 10 nanoseconds.
10 . The method of claim 8 , further comprising:
generating, using a photodiode of the optical sensor device, a photocurrent by capturing the light associated with the particular wavelength range;
accumulating, using a storage diode of the optical sensor device, a charge associated with the photocurrent;
transferring, based on a transfer cycle with a period that is less than 10 nanoseconds, the accumulated charge from the storage diode to a converter; and
converting the accumulated charge to the first optical measurement.
11 . The method of claim 8 , wherein the multi-layered subject comprises multi-layered tissue of a human body, and
wherein the one or more parameters comprise one or more health parameters associated with the human body.
12 . The method of claim 11 , wherein the one or more health parameters comprise at least one of:
a cardiac output parameter;
a respiration rate parameter;
a vascular disease parameter;
an arterial compliance parameter;
an endothelial function parameter;
a venous condition assessment parameter;
a vasospastic condition parameter;
a microvascular flow parameter;
a tissue viability parameter;
an autonomic function parameter;
a vasomotor function parameter;
a thermoregulation parameter;
an orthostasis parameter;
a vasoconstriction parameter;
a body fat composition parameter;
a food sensitivity response parameter;
a pharmaceutical sensitivity response parameter;
a skin coloring or tanning response parameter;
an electrolyte level parameter;
a carbon monoxide level parameter;
a hydration level parameter;
a blood glucose level parameter;
a blood pressure parameter;
a blood oxygen parameter; or
a heart rate parameter.
13 . The method of claim 8 , wherein providing the information indicating the one or more parameters comprises:
causing display of the information indicating the one or more parameters on a display screen associated with the optical sensor device.
14 . The method of claim 8 , further comprising:
passing the light associated with the particular wavelength range to a sensor element of the array of sensor elements while preventing light associated with at least one other wavelength range from passing to the sensor element.
15 . An apparatus, comprising:
means for obtaining, from an optical sensor comprising an array of sensor elements, optical measurements, related to light associated with a particular wavelength range that has propagated through a multi-layered subject, at time intervals of less than 10 nanoseconds, wherein an optical filter is disposed over the optical sensor and is configured to pass the light associated with the particular wavelength range to the array of sensor elements;
means for processing a first optical measurement of the optical measurements to determine one or more first characteristics associated with a first layer of the multi-layered subject,
wherein the first optical measurement indicates a first amount of the light associated with the particular wavelength range and accumulated during a first time range;
means for processing a second optical measurement of the optical measurements to determine one or more second characteristics associated with a second layer of the multi-layered subject,
wherein the second optical measurement indicates a second amount of the light associated with the particular wavelength range and accumulated during a second time range, and
wherein the first time range is a subrange of the second time range; and
means for providing, based on the one or more first characteristics and the one or more second characteristics, information indicating one or more parameters associated with the multi-layered subject.
16 . The optical sensor device of claim 3 , wherein the optical sensor further comprises:
a modulation gate configured to transfer the photocurrent to the storage diode.
17 . The optical sensor device of claim 3 , wherein the optical sensor further comprises:
a floating diffusion configured to provide the accumulated charge to the converter.
18 . The optical sensor device of claim 17 , wherein the optical sensor further comprises:
a transfer gate configured to transfer the accumulated charge to the floating diffusion.
19 . The optical sensor device of claim 17 , wherein the optical sensor further comprises:
a charge-transfer assisting gate configured to transfer the accumulated charge to the floating diffusion.
20 . The optical sensor device of claim 1 , wherein the optical measurements include an initial optical measurement; and
wherein the one or more processors are configured to:
modify the first optical measurement based on the initial optical measurement before processing the first optical measurement.