In 1940, Hans Goldmann invented the slit-lamp system in Bern, Switzerland, for use in eye examinations. This ophthalmic test system is considered the prototype of a confocal sensor measurement system. After more than 10 years of development abroad, Marvin Minsky produced the first confocal microscope and applied for a patent in 1957.

After a long decades of development, equipment companies with spectral confocal technology as the core principle emerged, and began to apply in the field of defect detection and precision measurement. Due to the unique high precision and non-contact, once launched, it was quickly accepted by the automated inspection industry, and has been rapid development.

　　Traditional industrial detection, generally using manual is not only slow, but also easy to cause damage to the surface of the detected object, behind the laser sensor, through the monochrome red or blue light, irradiation to the reflective surface of the test piece, through the reflection principle, the receiving objective to receive the reflected light. Due to the monochromatic light and triangle reflection method, the result is that the light on the surface of the specular reflection object or the surface of the transparent object, the reflected light can not be directly received or penetrated, and the laser sensor installation Angle will be affected, at the same time, the laser sensor emission light source inside the sensor, long-term use, will cause a certain temperature after heating.

Multi-spectral confocal sensor can avoid the above problems, the light source uses LED, and then disperses into a multi-spectral body, the light source and the probe are separated in different positions, and transmitted through optical fiber; The probe reflects the light path vertically up and down, and there is no need to consider the installation Angle when installing; Stable measurements can be made on any material surface.

With its own technical advantages, sitting on the rapid development of the 3C industry trend, in recent years has been rapid development, but the product brand and quality are uneven, need to do more detailed and development according to the actual special needs of the market, in order to suit the market.