This model makes use of the principle of triangulation and is equipped with a CMOS image sensor, which is formed with multiple light receiving elements, in the receiver. When the distance to the target changes, the peak position in the received light wave pattern on the CMOS image sensor also changes. Using this change, the laser sensor calculates the distance to the target.
The sensor first registers the distance to the background and the received light, which are used as reference, and then detects the target by sensing that the distance or received light differs from the registered reference when a target comes into the detection area. With the background, stable detection of target is ensured even if the target is a complex shaped object, has changes in colour and surface condition, or is a thin object with a small height difference.
Background Tuning enables the change in received light to be monitored. The LR-ZH can detect transparent objects by sensing the change in received light from the registered background. Though it is a distance setting type model, its versatility allows the detection even of transparent objects if there is a background.
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