The semiconductor laser 1 is focused by the lens 2 to the object 6 to be measured. The reflected light is collected by the mirror 3 and projected onto the CCD array 4; the signal processor 5 calculates the position of the light spot on the array 4 through trigonometric functions to obtain the distance from the object.

The laser transmitter shoots the visible red laser to the surface of the object through the lens, and the laser reflected by the object passes through the receiver lens and is received by the internal CCD linear camera. According to different distances, the CCD linear camera can "see" this at different angles. light spot. From this angle, known as the distance between the laser and the camera, the digital signal processor can calculate the distance between the sensor and the object being measured.

At the same time, the beam is processed by analog and digital circuits at the position of the receiving element, and analyzed by the microprocessor to calculate the corresponding output value, and output the standard data signal proportionally within the analog window set by the user. If the switch output is used, it will be turned on within the set window and turned off outside the window. In addition, independent detection windows can be set for analog quantity and switch quantity output.