Laser sensors for metals and rough surfaces


When measuring on shiny metals or machined surfaces that have small micro-machining marks on their surface, using a small laser spot is not recommended. This is because the micro-machined surface features suppress homogenous reflections, resulting in a noisy or unstable measurement signal.

Laser sensors with an oval-shaped laser spot of just a few mm in width, similar to a short ‘laser line’, are recommended for these tasks. Interference caused by surface roughness, defects, indentations or holes are filtered out using the oval-shaped light spot combined with special software algorithms. Furthermore, this type of sensor is suitable for distance measurements on structured surfaces i.e. when the distance to the surface and not the structure itself needs to be measured. The oval-shaped light spot is not affected by the surface structures, enabling continuous, stable measurement values to be generated.


The optoNCDT 1750 LL is a special laser sensor for shiny metals and structured surfaces. The oval laser spot facilitates a particularly easy and precise measurement on shiny metal surfaces or structured objects.

  • Measuring ranges (mm):
    2 | 10 | 20 | 50
  • Linearity from 1.6µm
  • Resolution max. 0.1µm
  • Adjustable measuring rate up to 7.5kHz
  • Analog and digital output
  • Precise measurements on metal surfaces
  • Special lens for oval-shaped laser point
  • Distance measurement on structured surfaces
  • Real-time compensation on changing surfaces (RTSC)
  • Integrated controller
Laser sensors of the series optoNCDT 2300LL use a very small laser line instead of the common laser spots. Due to this laser line, the optoNCDT 2300LL is also very well suited for precise distance and displacement measurement on glossy, porous or rough surfaces. Due to the high measurement rate of up to 49kHz it is possible to reliably apply the sensor in fast processes. The parameterization of the laser sensor is effected via web interface which is contacted via the Ethernet interface. Via the web interface numerous possibilities for the measurement value and signal processing are offered.

NEW: Analog output and 2 channel evaluation with C-BOX

  • Measuring ranges (mm):
    2 | 10 | 20 | 50
  • Linearity from 0.6µm
  • Resolution max. 0.03µm
  • Adjustable measuring rate up to 49.140 kHz
  • Interfaces: Ethernet, EtherCAT, RS422, Profinet, EtherNet/IP, analog via C-Box
  • Special optics for small laser line
  • Precise measurements on metallic and rough surfaces
  • Advanced Real-Time-Surface-Compensation (A-RTSC)
  • Integrated controller

8120 Brownleigh Dr.
Raleigh, NC 27617
919 787 9707
919 787 9706