Optical sensor device

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.

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.