In optical sensor technology contrast means the brightness difference of two objects. The brightness value is divided into several stages (grey values). As a rule the grey value is determined over the complete visible range.

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The SPECTRO-1-POF contrast sensors can detect very small differences in contrast at a very high speed of up to 200 kHz. The measurements can be put out through analog as well as digital. Through the SPECTRO1-Scope Windows® PC software it is possible to configure the sensor and follow the measurements in real-time via the scope-function. Moving as well as still objects can be inspected by this SPECTRO-1 sensor.