Ring for optically measuring biometric data

A method, comprising:

• activating at least two light sources of a monitoring device, wherein the monitoring device includes a ring-shaped housing having an opening configured to at least partially receive a digit of a wearer, the at least two light sources directed toward the opening of the housing and configured to emit light over at least two wavelengths;
• acquiring data to determine which of the at least two light sources have adequate contact with skin of the wearer;
• analyzing the data to determine which, if any, of the at least two light sources have adequate contact with the skin of the wearer and which, if any, of the at least two light sources do not have adequate contact with the skin of the wearer by identifying measurements having sudden changes or low variance;
• deactivating any of the at least two light sources only if any of the at least two light sources are determined to not have adequate contact with the skin of the wearer;
• if it is determined that at least one light source has adequate contact with the skin of the wearer, detecting, using at least one photodetector of the monitoring device, light emitted by the at least one light source having adequate contact with the skin of the wearer and corresponding to at least one light path, wherein light activation and detection are triggered by a determination that motion data from at least one motion sensor is indicative of the monitoring device being substantially still;
• and
• determining biometric information when light passes through the digit of the wearer based on the light detected by the at least one photodetector.

A non-transitory computer-readable storage medium including instructions that, when executed by at least one processor, cause the at least one processor to:

• activate at least two light sources of a monitoring device, wherein the monitoring device includes a ring-shaped housing having an opening configured to at least partially receive a digit of a wearer, the at least two light sources directed toward the opening of the housing and configured to emit light over at least two wavelengths;
• acquire data to determine which of the at least two light sources have adequate contact with skin of the wearer;
• analyze the data to determine which, if any, of the at least two light sources have adequate contact with the skin of the wearer and which, if any, of the at least two light sources do not have adequate contact with the skin of the wearer by identifying measurements having sudden changes or low variance;
• deactivate any of the at least two light sources only if any of the at least two light sources are determined to not have adequate contact with the skin of the wearer;
• if it is determined that at least one light source has adequate contact with the skin of the wearer, detect, using at least one photodetector of the monitoring device, light emitted by the at least one light source having adequate contact with the skin of the wearer and corresponding to at least one light path, wherein light activation and detection are triggered by a determination that motion data from at least one motion sensor is indicative of the monitoring device being substantially still;
• and
• determine biometric information when light passes through the digit of the wearer based on the light detected by the at least one photodetector.