Laser Position Measurement
LAS-laser sensors cover a measurement range from 30 to 1000mm. The internal micro controller gives a precise output signal, which is proportional to the distance to be measured. No external electronic device is needed. An intelligent on-board signal conditioning unit enables the sensor to measure accurately on different target colours and surfaces.
The distance measurement is based on the triangulation principle: The laser beam hits the target as a small spot. The position of this spot is detected by the receiver. Then the sensor can measure the angle and calculate the distance to the target.
The possible resolution and accuracy change with the measure distance to the target object. The receiver of the sensor is a photo diode array (a PSD element for faster response). The readout of the photo diode array is handled by an internal micro controller. The controller calculates the precise angle from the light allocation in the photo diode array. The combination of photo diode array and micro controller allows a minimum of undesirable reflections. Thus a precise distance measurement is possible even on critical surfaces.
