Chromatic Confocal technique uses white light that passes through a series of lenses with high degree of chromatic aberrations. Each wavelength will focus at a different distance creating the vertical measurement range. When a surface of interest is within the measurement range a single wavelength of the white light will be in focus while all others will be out of focus. Only the focused wavelength will pass through the pin hole filter to reach the CCD spectrometer. The physical wavelength measured corresponds to a vertical position. No complex algorithms are used to obtain the height value ensuring accurate results for all surface conditions unlike other techniques.