OPTICAL SENSING DEVICE

An optical sensing device includes a device casing and an optical sensor on the device casing. In an embodiment, the optical sensing device further includes an image-capturing device on the device casing. The sensing direction of the optical sensor and the capturing direction of the image-capturing device point in the same direction. The image-capturing device can capture an image of an object to be sensed by the optical sensor. In another embodiment, the optical sensing device further includes a flexible shielding cover on the device casing and enclosing the optical sensor for shielding the optical sensor from external light.