The heat dissipation problem of the laser pointer

The laser pointer is a pen-shaped transmitter designed to be portable and easy to hold with visible laser. In multimedia teaching, it is usually used to project a light spot or a light directed at the screen to facilitate the communication between the teacher and the audience. The laser pointer generates a lot of heat when it is working, causing the internal temperature of the laser pointer to rise. Long-term high temperature will reduce the life of the laser module inside the laser pointer. Therefore, the heat dissipation of the laser pointer has always been a problem to be solved in the laser pointer design. . In order to solve the heat dissipation problem of the existing laser pointer, the person skilled in the art opens a heat dissipation hole on the outer wall of the laser pointer. Since the heat dissipation hole is connected to the inside of the laser pointer, the laser pointer is exposed to the air when it is not in use. Dust or other impurities enter the laser pointer through the heat dissipation holes, causing the laser module to become dusty. The dust will affect the heat dissipation of the laser pointer, and even worse, it will cause corrosion of the internal circuit of the laser pointer and affect its service life.