Abstract: A wearable device includes: a body, a driving assembly, and a camera assembly. The body includes a working surface and a side wall connected to an edge of the working surface. The driving assembly is connected to the body and includes an adjusting component and a supporting component that protrude from the side wall. The adjusting component and the supporting component are rotatable relative to each other in a plane perpendicular to the working surface. The camera assembly includes a lens connected to the adjusting component and an image sensor connected to the supporting component. The relative rotation of the adjusting component and the supporting component drives the lens to move linearly in a direction perpendicular to a photosensitive surface of the image sensor.

Abstract: A photoplethysmograph device includes a housing provided with a mounting hole; an optical device accommodated in the mounting hole; and a light-transmitting member including a first end face, a side face connected to the first end face, and a second end face away from the first end face and connected to the side face. The light-transmitting member is connected to the housing and blocks the mounting hole, and the first end face is disposed near the optical device; the side face includes a reflecting face configured to totally reflect light incident on the reflecting face from the first end face to the second end face so as to emit the light, or totally reflect light incident on the reflecting face from the second end face to the first end face so as to emit the light.

Abstract: A photoplethysmograph device includes a housing provided with a mounting hole; an optical device accommodated in the mounting hole; and a light-transmitting member including a central portion and a surrounding portion disposed around the central portion. The surrounding portion includes at least one end face having a textured layer configured to scatter and/or absorb light; the central portion has an end face without being provided with the textured layer. The light-transmitting member is connected with the housing and located at an outer side of the optical device. The end face of the central portion is disposed corresponding to the optical device, and the end face of the surrounding portion is disposed corresponding to an area without being provided with the optical device.