Assembly; Notes For Operation; Reflectance Of Target Surface - MICRO-EPSILON optoNCDT 1900 PROFINET Operating Instructions Manual

Assembly

5. Assembly
5.1

Notes for Operation

5.1.1

Reflectance of Target Surface

In principle, the sensor evaluates the diffuse portion of the reflections of the laser light spot.
Laser beam
Ideal diffuse reflection
Fig. 8 Reflectance of target surface
Any statement about a minimum reflection factor is only possible with reservations, since small diffuse portions can be evaluated even
of reflecting surfaces. This happens based on intensity determination of the diffuse reflection from the CMOS signal in real time and
subsequent control, see Chap. 3.2. However, for dark or shiny measuring objects, such as black rubber, a longer exposure time may
be required. The maximum exposure time is coupled to the measuring rate and can only be increased by lowering the measuring rate
of the sensor.
optoNCDT 1900 / Profinet
Laser beam
2

Direct mirror reflection
Laser beam
Real reflection
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