What is the principle of spectral confocal displacement sensor? Which fields can be applied?

As a new high-precision measuring device, the spectral confocal displacement sensor has a non-contact function 、 High precision 、 high stability 、 Big angle 、 High sampling frequency and other measurement characteristics . So as a new measurement technology , What is the principle of spectral confocal ：

A beam of white light （ Or multi wavelength mixed light ） Through a small hole , Different wavelengths are focused on the optical axis through the lens , Dispersively form a rainbow like distribution band , Irradiate the sample , Part of the reflected light is reflected back .（ As shown on the left of the figure below ） The light shining at the intersection of the optical axis and the object surface passes through the beam splitter , Irradiate the spectrum analyzer through a small hole . The distance between the lens and the object to be measured can be calculated according to the wavelength （ The following figure is shown on the right ）.

What is the principle of spectral confocal displacement sensor ？ Can be applied in those fields ？

As a new type of non-contact high-precision measuring equipment , Accuracy can reach sub micron level , For example, it can be used to measure the thickness of transparent objects , And the outline 、 Displacement 、 Height 、2d3d Surface radian sweep 、 Thickness measurement of opaque objects 、 Vibration measurement 、 Deep hole 、 Level measurement 、 Microchannel 、 Flatness measurement, etc .

What is the principle of spectral confocal displacement sensor ？ Can be applied in those fields ？

In the mobile phone industry , For example, curved cover glass inspection 、 Mobile phone motherboard detection 、 Key size or height detection 、 Chip detection 、 Camera module detection 、 Mobile camera module detection, etc . Semiconductor industry , Chip pin flatness detection , Wafer depth and thickness measurement . Glass measurement , Such as thickness 、 Radian and other products requiring high precision .