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Instructions for Operating
optoNCDT 2300
10. Instructions for Operating
10.1 Reflection Factor of the Target Surface
In principle the sensor evaluates the diffuse part of the reflected laser light.
Laser beam
Ideal diffuse reflection
Real reflection, usually mixed
2
Direct mirror reflection
Laser beam Laser beam
Fig. 53 Reflection factor of the target surface
A statement concerning a minimum reflectance is difficult to make, because even a small diffuse fraction can be evaluated from highly
reflecting surfaces. This is done by determining the intensity of the diffuse reflection from the CMOS signal in real time and subse-
quent compensation, see Chap. 3.2. Dark or shiny objects being measured, e.g. black rubber, may require longer exposure times.
The exposure time is dependent on the measuring rate and can only be increased by reducing the sensor’s measuring rate.
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