Sighting device

A sighting device, configured to aim at a target, comprising:

• a main body, including a first side and a second side which is opposite to the first side;
• a lens module disposed on the first side, wherein the lens module includes a lens element and an image sensor;
• a display module, disposed on the second side and connected to the lens module, wherein the display module is configured to display an image captured from the lens module;
• an infrared (IR) light assembly, disposed on the first side, wherein the infrared light assembly can be switched between an open state and a closed state;
• a filter member, disposed between the lens element and the image sensor and having an infrared cutting region;
• and
• an adjusting ring, disposed on the top side of the main body, wherein the adjusting ring is configured to adjust the lens module to perform optical focus or optical zoom;
• wherein the infrared cutting region overlaps the lens element and the image sensor in the direction of an optical axis of the lens element according to the infrared light assembly in the closed state, and the infrared cutting region does not overlap the lens element when the infrared light assembly is in the open state;
• wherein the adjusting ring has a main wheel and a plurality of protruding rods separately disposed on the main wheel, and the lens element has a barrel having a plurality of grooves, wherein the protruding rods correspond to and engage with the grooves.