Laser pointer, also known as laser pen, pointed star pen, etc., is a pen type emitter that designs visible laser into a portable, easy to grip, and laser module (diode) processing. Early laser indicators often used helium neon gas lasers, producing lasers with a wavelength of 633nm. With the development of technology, laser diodes have gradually become mainstream, and various colors of laser indicators have emerged.

Laser pointer is a small low-power laser that uses laser as an indicator and belongs to general household items. Laser amplifies or oscillates light in certain excited substances through the principle of stimulated radiation, forming a high-intensity beam. The laser pointer contains components such as laser diodes, batteries, switches, etc., which are controlled by circuits to emit laser beams.