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What is the non-sensitivity zone?

ID:
926
Issued:
Dec 28th, 2009
Updated:
May 17th, 2013

What is the non-sensitivity zone?

ANSWER

This is the area extending from several millimetres in front of the sensor to several tens of millimetres where the sensor does not operate.

The sensor detects the presence of an object based on the position of entry in the receiver element of the light reflected off the object. If the object is in immediate proximity to the sensor, the light emitted from the sensor does not return to the receiver element and the object is not detected. As the sensor will be incorporated into a device, it is frequently used with a front cover, and the non-sensitivity zone keeps the cover from being detected and helps the sensor operate normally.
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