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photovoltaics stories

User Stories "Photovoltaics"

Due to the successful implementation of photovoltaic technology it has become necessary to produce growing quantities of solar cells at competitive prices. Precitec Optronik optical sensors are used to control the wafer cutting and grinding processes, right from pre-production, as the high data acquisition rates allow simultaneous capture of thickness and surface finish. The modular sensors ensure real-time metrology of many key wafer parameters during production. The dynamic range of the optical systems make them the perfect tool to measure the topography of electronic circuitry with high precision even from surfaces with widely varying reflectivity. This occurs during the production process as well as under laboratory conditions.



Topography Measurement with a Chromatic-Confocal Sensor

Non-Contact Thickness Measurements

The CHRocodile MI5 sensor is perfectly suited to measure thicknesses of Si and GaAs up to 1mm. Transparent films and coatings can be measured up to a thickness of 2,5 mm. The CHRocodile MI5 modular optical sensor works with infrared light and is perfectly suited for thenon-contact thickness measurement of visually non-transparent materials from one side. CHRocodile MI5 was specially designed for industrial inline use with up to 5 channels in a 19˝ housing case.


  • High-precision thickness and distance measurement from one side only
  • Simultaneous measurement at up to 5 measuring points
  • Non-contact, non-destructive measuring method
  • High gloss and wavy surfaces can also be measured
  • Variable measuring distance (23 mm is the standard)
  • Up to 4,000 measurements per second
  • Easy to integrate into the production process
  • Small, robust and inexpensive - compact 19“ housing
  • No subsequent calibration of the sensor necessary


Finger heights on solar cells

Due to their high dynamics, CHRocodile sensors are ideal optical sensor tools for the high precision topography measurement of conductor paths, even on surfaces with differing reflective surfaces. Simple and robust sensors can be used right in the production process, but also under laboratory conditions. This means that the quality-related finger heights are determined with the highest accuracy.

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