Laser beam has been widely used in various industries due to its unique features. Its usage can be generally divided into two categories: detection and application. In detection usage, one or more detectors are used next to the laser to measure the desired feature by measuring the feedback of the laser beam. In laser application, the interaction of the beam with the material is used to apply the necessary changes to the desired material or object. The products of this field include all kinds of detection with the help of laser.