Precise displacement and distance measurements on reflecting surfaces


Displacement and distance measurements on highly reflective surfaces such as plastics, mirrored glass or metals require special laser sensors such as the optoNCDT 1750DR. This sensor generates stable signals due to the real-time surface compensation feature which enables the exposure time to be controlled. Its compact design with integrated controller allows the installation even in restricted installation spaces.

Displacement and distance measurements on strongly reflecting surfaces are a challenge for conventional laser sensors, as these are actually designed for diffuse reflection. However, the optoNCDT 1750DR is intended for surfaces such as reflecting plastics, mirrored glass and polished metals. It measures based on the principle of direct reflection while being aligned in such a way that the angle of incidence is equal to the angle of reflection. Special evaluation algorithms compensate for the light which is back-scattered at high intensity. Moreover, the sensor performs real-time surface compensation, i.e. exposure control in real time. This compensates for fluctuating reflectivity and generates stable measurement values with high accuracy.

Its compact design with integrated controller make the sensor ideally suited to restricted installation spaces. Mounting and wiring are easy as no external controller unit is required. The mounting template included enables the user to align the sensor correctly. Another advantage is the laser class 1 rating on which the optoNCDT 1750DR operates. Therefore, additional safety precautions are not necessary since the emitted laser power is max. 390 µW. The laser sensor can be operated using an intuitive web interface. Due to the selectable settings and evaluation possibilities, it is ideal for industrial applications with high dynamics.

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