Laser pointer (Laser pointer), also known as laser pointer, pointing pointer, etc., is a pen-shaped transmitter designed to be portable, easy to hold, and processed into laser modules (diodes) from visible lasers. Common laser pointers include red light (650-660nm), green light (532nm), blue light (445-450nm) and blue-violet light (405nm). It is usually used by people in conferences, teaching, and tour guides to project a point of light or a light directed at an object, but it may damage or affect places where the guide is located, such as art galleries (some paintings are afraid of light), zoos, etc. Should not be used. The Civil Aviation Law of China and the Regulations on the Administration of Civil Airports stipulate that lasers cannot be used to irradiate aircraft

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