Dynamically reconfigurable apertures for optimization of PPG signal and ambient light mitigation

An electronic device for measuring physiological information, the device comprising:

• one or more light emitters configured to emit light;
• one or more light sensors configured to detect a reflection of the emitted light and generate one or more signals indicative of the detected reflected light;
• and
• a device component capable of forming dynamically reconfigurable apertures having a configuration to allow light to be transmitted from at least one of the one or more light emitters to at least one of the one or more light sensors,
• a processor configured to:
• determine the physiological information based on the one or more signals;
• wherein:
• during a first configuration:
• the one or more light emitters are configured to emit a first light,
• the one or more light sensors are configured to receive a second light, the second light being a reflection of the first light, and
• the apertures, each having a center location, are configured to:
• allow the first light to be transmitted from the one or more light emitters, and
• allow the second light to be received at the one or more light sensors;
• and
• during a second configuration:
• the one or more light emitters are configured to emit a third light,
• the one or more light sensors are configured to receive a fourth light, the fourth light being a reflection of the third light,
• the apertures are configured to:
• allow the third light to be transmitted from the one or more light emitters, and
• allow the fourth light to be received at the one or more light sensors;
• and
• wherein the processor is further configured to compare a signal from the second light to a signal from the fourth light and dynamically adjust a separation distance between the center locations of the apertures from the first configuration to the second configuration.