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Functional Principle, Technical Data
optoNCDT 2300
The diffuse element of the reflection of the light spot is imaged by a receiver optical element positioned at a certain angle to the optical
axis of the laser beam onto a high-sensitivity resolution element (CCD), in dependency on displacement. From the output signal of the
CCD element a digital signal processor (DSP) in the sensor calculates the displacement between the light spot on the object being
measured and the sensor. The displacement is linearized and then issued via digital interfaces.
3.2 Real Time Control (A-RTSC)
The CMOS element determines the intensity of incident light during the exposure. This enables the sensor to compensate for fluctua-
tions in brightness on the object being measured. What is more, it does so in a range from almost total absorption to almost total
reflection. The new A-RTSC (Advanced Real-Time-Surface-Compensation) is a development of approved RTSC and allows a more
accurate real-time surface compensation in the measurement process with a higher dynamic range.
3.3 Exposure Control
Dark or shining objects to be measured may require a longer exposure time. However, the sensor is not capable of providing expo-
sure which is any longer than permitted by the measurement frequency. For a longer exposure time, therefore, the measurement
frequency of the sensor has to be reduced either manually or by command, see Chap. 7.4.2
.
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