To change visible, first change invisible


FocalSpec’s Line Confocal Imaging (LCI) is a unique and globally patented measuring technology that we developed to overcome the shortfalls of existing technologies. With the help of LCI our customers can carry out all measuring and testing on-line and get exactly the desired look&feel and quality for their products. Our technology applies even on transparent and mirror shiny materials or a combination of them at manufacturing line speeds. No speckle noise, no interference. Sensors’ z-range is the most forgiving available allowing more freedom at industrial robotics selection.


LCI technology enables 2D and 3D measurement of various stationary and moving surfaces at a very high resolution. The LCI sensors use a measurement profile line with 2048 pixels, i.e. 2048 3D raw measurement data points are recorded simultaneously.

With a complex optical arrangement, white light emitting from a light source on a sensors transmitter side is split into a continuous spectrum with thousands of wavelengths. Each wavelength is focused on a plane with certain distance from the sensor. Depending on how far each of the 2048 surface point from the sensor is, the dominating wavelength for each point is reflected back to the sensor’s receiver.

Measuring principle Line confocal imaging (LCI): Measuring principle


  • Amount of simultaneously measured points is 2048
  • Maximum Z (height) resolution is 0.1µm
  • Maximum lateral resolution is 2.1µm
  • Maximum measurement profile line length is 16.4mm
  • Maximum Z range is 5.5mm
  • Maximum thickness measurement resolution is 0.1µm
  • Minimum layer thickness for thickness measurement only is  ̴ 30µm
  • Maximum measurement speed is 5000 lines per second (5.0kHz)


  • SPEED: Maximum measurement speed with highly forgiving stand-off distance.
  • ACCURACY: Sub-micron measurement results online independent of the sample material type.
  • NO INTERRUPTIONS: LCI is a fast non-contact on-line measurement method well suitable for continuous manufacturing processes.
  • SUPPORT FOR ALL SURFACE TYPES: LCI can measure all material types including matte, mirror shiny and transparent.
  • EASY TO INTEGRATE AND MAINTAIN: LCI sensors are robust and they perform well in practical manufacturing conditions. Local technical support is provided in time.
  • NEW POSSIBILITIES: LCI is the only technology that combines 3D tomography, 3D topography and 2D intensity imaging into one sensor.


LCI sensors can be used to measure 3D dimensions, step height, width, thickness, surface roughness and burr height. For 3C electronics our applications include component inspection and assembly, printed and hybrid electronics, flexible devices, substrates, films, foils, 3D glass, smart glass and displays.


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