·The image of vision sensors to obtain stable, image dark bright, contrast, and the size of the shutter can free control, such as convenient debugging.
·Image intuitive and can provide more abundant information than other sensors, ranging accuracy is relatively high.
·High stability, less susceptible to interference, sampling period is very short, quick speed, can provide information in a complex environment.

Although the size of the laser sensor has become increasingly miniaturized in recent years, but compared with the electromagnetic type displacement sensor, laser sensor size still too big. Adopts the reflecting type of laser triangle measuring method of benefits:
·Using semiconductor laser measuring instrument is small in size, lighter weight and easier to integration.
·Semiconductor laser directional well, light power is high, so that the measuring rate is high, the stability is good.
·Triangulation method has a non-contact, moderate speed, high accuracy, high response frequency, has been widely used in on-line measurement of industrial products.
·Smaller measuring spot, larger range, allows larger distance, can measure almost any object to be tested.

·Can measure almost all types of materials (metals, glass, ceramics, semiconductors, paper).
·Solve the laser triangulation method is unable to avoid measurement error caused by the surface material changes or tilt. Mirror, glass, specular metal surface can be stable measurement, etc.
·Is not sensitive to ambient illumination.
·Suitable for bad environment (high temperature/high pressure, radiation).
·A large number of alternative range range (100 microns to 42 micron range); Minimum can measure the thickness of 400 nm, the highest resolution of 0.3 nm. Can provide specific requirements for light pen (inner diameter pen/radial pen/large working distance/small spot size).