Abstract:
A wearable device is described. The wearable device includes a housing having a back cover, and an optical mask on first portions of the back cover. The back cover includes a set of windows, with a first subset of windows in the set of windows being defined by an absence of the optical mask on second portions of the back cover, and a second subset of windows in the set of windows being inset in a set of openings in the back cover. An optical barrier surrounds each window in the second subset of windows. A set of light emitters is configured to emit light through at least some of the windows in the set of windows. A set of light detectors is configured to receive light through at least some of the windows in the set of windows.
Abstract:
This relates to systems and methods for determining one or more of a user's physiological signals. The one or more of the user's physiological signals can be determined by measuring pulsatile blood volume changes. Motion artifacts included in the signals can be canceled or reduced by measuring non-pulsatile blood volume changes and adjusting the signal to account for the non-pulsatile blood information. Non-pulsatile blood volume changes can be measured using at least one set of light emitter-light sensor. The light emitter can be located in close proximity (e.g., less than or equal to 1mm away) to the light sensor, thereby limiting light emitted by the light emitter to blood volume without interacting with one or more blood vessels and/or arterioles. In some examples, the systems can further include an accelerometer configured to measure the user's acceleration, and the acceleration signal can be additionally be used for compensating for motion artifacts.
Abstract:
There is provided a wearable device (600). The wearable device (600) comprises a housing having a back cover (607), the back cover (607) including a set of windows arranged around a central portion of the back cover, wherein, a first subset of windows (645) have a first shape, a second subset of windows (650) have a second shape different than the first shape, and the first subset of windows (645) alternate with the second subset of windows (650). The wearable device (600) further comprises a first set of optical barriers (687) surrounding each window of the second subset of windows (650), a set of light emitters configured to emit light through each of the first subset of windows (645), and a set of light detectors configured to receive light through each of the second subset of windows (650).
Abstract:
An electronic device can include a housing defining an aperture, and an electromagnetic radiation emitter (1760, 1762, 1764) and an electromagnetic radiation detector (1770) disposed in the housing. An optical component (1711) can be disposed in the aperture and can include a first region (1720, 1722) of a first material having a first index of refraction, the first region aligned with the electromagnetic radiation emitter, a second region (1724) of the first material, the second region aligned with the electromagnetic radiation detector, and a bulk region (1730) surrounding a periphery of the first region and a periphery of the second region, the bulk region including a second material having a second index of refraction that is lower than the first index of refraction.
Abstract:
There is provided a wearable device (600), comprising: a housing having a back cover (607); an optical mask on first portions of the back cover (607); the back cover (607) including a set of windows positioned around a central portion of the back cover (607), wherein: a first subset of windows (645) in the set of windows is defined by an absence of the optical mask on second portions of the back cover (607); and a second subset of windows (650) in the set of windows is inset in a set of openings in the back cover (607), wherein windows the second subset of windows (650) are arranged to alternate with windows of the first subset of windows (645); an optical barrier (687) surrounding each window in the second subset of windows (650); a set of light emitters configured to emit light through at least some of the windows in the set of windows; and a set of light detectors configured to receive light through the second subset of windows (650).
Abstract:
There is provided a wearable device (600). The wearable device (600) comprises a housing having a back cover (607), the back cover (607) including a set of windows arranged around a central portion of the back cover, wherein, a first subset of windows (645) have a first shape, a second subset of windows (650) have a second shape different than the first shape, and the first subset of windows (645) alternate with the second subset of windows (650). The wearable device (600) further comprises a first set of optical barriers (687) surrounding each window of the second subset of windows (650), a set of light emitters configured to emit light through each of the first subset of windows (645), and a set of light detectors configured to receive light through each of the second subset of windows (650).