Remote sensing system with time-of-flight sensor, active illuminator and light sensing system

A system worn by a user comprising:

• a light source comprising a plurality of light emitting diodes that are configured to generate an output optical light having one or more optical wavelengths;
• one or more lenses configured to receive at least a portion of the output optical light and to direct a lens output light towards a bodily tissue of the user;
• and
• a detection system comprising a plurality of detectors that are spatially separated from each other, the detection system configured to:
• (i) receive at least a portion of the lens output light reflected from the bodily tissue and (ii) generate an output signal having a signal-to-noise ratio, and (iii) be synchronized to the light source, wherein the output signal is associated with one or more physiological parameters;
• wherein the signal-to-noise ratio of the output signal is configured to be increased by increasing light intensity of at least one of the plurality of light emitting diodes from an initial light intensity;
• wherein at least one analog to digital converter is coupled to at least one of the plurality of detectors;
• wherein the detection system is further configured to:
• generate a first signal responsive to light received while the light emitting diodes are off,
• generate a second signal responsive to light received while at least one of the light emitting diodes is on, and
• further increase the signal-to-noise ratio by comparing the first signal and the second signal;
• wherein the light source and the detection system are further configured to be coupled to a processor, a display device, and a light sensing system, the light sensing system comprising:
• a multi-wavelength filter to separate incoming ambient light into a series of wavelength bands;
• and
• a detector array configured to capture at least some of the series of wavelength bands and configured to be coupled to a second one or more analog to digital converters to generate a color output;
• and
• wherein the processor is configured to receive at least a portion of the color output and adjust a visual output of the display device, and wherein the display device is configured to display at least some of the one or more physiological parameters.

A physiological measurement device comprising:

• a housing configured to be physically applied to a user;
• a light source physically incorporated into the housing, the light source being configured to emit light;
• a plurality of detectors including a first detector, a second detector, and a third detector,
• the first detector being (i) configured to detect light and (ii) physically incorporated into a first side of the housing such that the first detector is positioned to face a first direction,
• the second detector being (i) configured to detect light and (ii) physically incorporated into the first side of the housing such that the second detector is positioned to face a second direction, and
• the third detector being (i) configured to detect ambient light and (ii) physically incorporated into a second opposing side of the housing such that the third detector is positioned to face a third direction, the third direction being generally opposite the first direction;
• a processor coupled to the housing and configured to:
• with the housing physically applied to the user such that the light source, the first detector, and the second detector are adjacent to a tissue of the user, generate a first reflected light signal, the first reflected light signal being associated with light reflected from the tissue of the user that was emitted from the light source and received by the first detector;
• with the housing physically applied to the user such that the light source, the first detector, and the second detector are adjacent to the tissue of the user, generate a second reflected light signal, the second reflected light signal being associated with light reflected from the tissue of the user that was emitted from the light source and received by the second detector;
• with (i) the housing physically applied to the user such that the light source, the first detector, and the second detector are adjacent to the tissue of the user and (ii) the light source not emitting light, generate a first ambient light signal, the first ambient light signal being associated with ambient light received by (i) the first detector, (ii) the second detector, or (iii) both;
• with the housing physically applied to the user such that the light source, the first detector, and the second detector are adjacent to the tissue of the user, generate a second ambient light signal, the second ambient light signal being associated with ambient light received by the third detector;
• perform an analysis of the first reflected light signal, the second reflected light signal, and the first ambient light signal;
• based at least in part on the performed analysis, generate a processed output signal having a signal-to-noise ratio that is greater than a signal-to-noise ratio of the first reflected light signal, the processed output signal being associated with a physiological parameter of the user;
• and
• using the processed output signal, determine a measurement of the physiological parameter for the user.