Lens module

A lens module, comprising:

• a lens;
• a lens barrel for receiving the lens;
• a lens seat connected to an edge of the lens barrel close to an image side;
• and
• an optical filter disposed in the lens seat,
• wherein the optical filter divides a space defined by the lens barrel and the lens seat into a first space and a second space,
• the optical filter comprises an object side surface, an image side surface disposed opposite to the object side surface, and a connection surface connecting the image side surface with the object side surface,
• the lens seat comprises an matching surface for matching the lens barrel, an installation surface opposite to the matching surface and fixed to the object side surface, and an inner ring surface extending from an edge of the installation surface towards the image side and surrounding a periphery of the connection surface,
• the first space is located at an object side of the optical filter, and the second space is located at an image side of the optical filter,
• the lens seat is provided with an exhaust channel penetrating through the lens seat and communicating the first space with outside,
• an air guiding groove is formed by recessing from the installation surface towards an object side and communicates the second space with the exhaust channel, and the air guiding groove comprises a first groove close to the first space and a second groove extending from an end of the first groove facing away from the first space while being bent in a direction facing towards the inner ring surface.