Optical sensing device

An optical sensing device includes a device casing and an optical sensor disposed on the device casing. The optical sensor performs sensing in a sensing direction thereof. In an embodiment, the optical sensing device further includes an image-capturing device disposed on the device casing and having a capturing direction. The sensing direction and the capturing direction point to the same orientation. The image-capturing device can capture an image of an object to be sensed by the optical sensor, which enhances the relationship between the sensing data and the sensed object. In another embodiment, the optical sensing device further includes a flexible shielding cover disposed on the device casing and surrounding the optical sensor. The flexible shielding cover can effectively shield the optical sensor from external light for reducing or eliminating the influence of the external light on the sensing of the optical sensor.