Many people do not know how to measure the spectral confocal sensor? Today, the spectrometer spectral confocal manufacturers will simply tell you:

The spectral confocal measurement method takes advantage of the physical phenomenon of chromatic aberration lens deviation. By using a special lens, the focus halo range of different colors of light is extended to form a special amplification color difference, so that according to the distance between the measured object and the lens, a precise wavelength of light will be focused on the measured object.

By measuring the wavelength of the reflected light, the exact distance of the object under measurement to the lens can be obtained. This process is the opposite of the process by which photographic equipment reduces chromatic aberration through various methods.

In order to obtain the above special color difference, several special lenses are used in the sensor probe to break down the light according to the desired range. Finally, a convex lens is used to gather the light emitted from the sensor probe on an axis, forming the so-called focus axis. If the convex lens is not used, the light emitted by the sensor probe will be dispersed and the measurement will not be possible.

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