The non-contact displacement optoNCDT product group utilizes optical triangulation as a measuring principle. A laser diode projects a visible spot of light onto the target surface (laser class 2). The light reflected from this spot is directed through an optical receiving system onto a position-sensitive element. Optical displacement sensors measure with a large reference distance and a very small measuring spot diameter. Nearly all models work with a high resolution CCD-line or CMOS-line and a DSP.