Abstract: Provided herein are methods and devices configured to detect the heart rate of a user. The method includes receiving at least one input signal, separating the input signal into signal components, receiving a motion signal from the user, and applying a Bayesian filter to the signal components and the motion signal to estimate the heart rate of the user. The method further includes calculating a combination of at least two reflected light signals from at least two different wavelengths. The device includes a photodetector configured to detect at least one reflected light signal resulting from the emitted at least two different wavelengths and a motion detector for detecting a motion signal. The device also includes a processing component configured to calculate a combination of the reflected light signals, separate the combination of detected light signals into signal components, and apply a Bayesian filter to the signals.

Abstract: A device configured to determine a biological indicator level in tissue. The device includes at least one emitter configured to emit light, a detector configured to receive light and transmit data representative of the received light and a processor coupled to the at least one emitter and the detector. The device further includes a non-transitory storage medium coupled to the processor and configured to store instruction to cause the device to determine a level of a biological indicator.

Abstract: A device configured to determine a biological indicator level in tissue. The device includes at least one emitter configured to emit light, a detector configured to receive light and transmit data representative of the received light and a processor coupled to the at least one emitter and the detector. The device further includes a non-transitory storage medium coupled to the processor and configured to store instruction to cause the device to determine a level of a biological indicator.

Abstract: Provided herein are methods and devices operable to monitor the hydration of a user. The wearable device for hydration monitoring includes an emitting component operable to emit light having at least three different wavelengths, a sensor operable to receive a reflected portion of the emitted light, and a processor operable to receive signals from the sensor. At least one of the wavelengths is in the range from 900 nm to 1600 nm for optical detection of a level of water. The method for hydration monitoring includes emitting light from a light emitting component operable to emit light having at least three different wavelengths and detecting light with at least one photodetector. At least three distances between the light emitting component and the photodetector are known and the at least three distances allow monitoring of at least two different tissue beds with at least two different tissue depths.

Abstract: Optical-electronic device configured to generate a calibration factor for use in determining optical density. The device includes at least one emitter configured to emit light, a detector configured to receive light and transmit data representative of the received light and a processor coupled to the at least one emitter and the detector. The device further includes a non-transitory storage medium coupled to the processor and configured to store instruction to cause the device to perform the calibration method. Additionally, a calibration container includes a main body, upper lid, and a lower lid. The main body is configured to receive the device and an object having known optical properties.

Abstract: Provided herein are methods and devices configured to detect the heart rate of a user. The method includes receiving at least one input signal, separating the input signal into signal components, receiving a motion signal from the user, and applying a Bayesian filter to the signal components and the motion signal to estimate the heart rate of the user. The method further includes calculating a combination of at least two reflected light signals from at least two different wavelengths. The device includes a photodetector configured to detect at least one reflected light signal resulting from the emitted at least two different wavelengths and a motion detector for detecting a motion signal. The device also includes a processing component configured to calculate a combination of the reflected light signals, separate the combination of detected light signals into signal components, and apply a Bayesian filter to the signals.

Abstract: A device configured to determine a biological indicator level in tissue. The device includes at least one emitter configured to emit light, a detector configured to receive light and transmit data representative of the received light and a processor coupled to the at least one emitter and the detector. The device further includes a non-transitory storage medium coupled to the processor and configured to store instruction to cause the device to determine a level of a biological indicator.

Abstract: Optical-electronic device configured to generate a calibration factor for use in determining optical density. The device includes at least one emitter configured to emit light, a detector configured to receive light and transmit data representative of the received light and a processor coupled to the at least one emitter and the detector. The device further includes a non-transitory storage medium coupled to the processor and configured to store instruction to cause the device to perform the calibration method. Additionally, a calibration container includes a main body, upper lid, and a lower lid. The main body is configured to receive the device and an object having known optical properties.

Abstract: Provided herein are methods and devices operable to monitor the hydration of a user. The wearable device for hydration monitoring includes an emitting component operable to emit light having at least three different wavelengths, a sensor operable to receive a reflected portion of the emitted light, and a processor operable to receive signals from the sensor. At least one of the wavelengths is in the range from 900 nm to 1600 nm for optical detection of a level of water. The method for hydration monitoring includes emitting light from a light emitting component operable to emit light having at least three different wavelengths and detecting light with at least one photodetector. At least three distances between the light emitting component and the photodetector are known and the at least three distances allow monitoring of at least two different tissue beds with at least two different tissue depths.