Use of deflecting mirrors
For protection or control of areas accessible from several sides, one or more deflecting
mirrors can be used in addition to the Emitter and Receiver.
Deflecting mirrors make it possible to redirect the beams generated by the Emitter on
several sides.
Wishing to deflect the beams generated by the Emitter by 90°, the perpendicular to the
surface of the mirrors must form an angle of 45° with the direction of the beams.
An application in which two deflecting mirrors have been used for "U" shaped protection
is illustrated in the figure below.
Figure 7 – Deflecting mirrors
When using deflecting mirrors, comply with the following rules:
Position the mirrors so as to comply with the minimum safety distance
(Figure 7) on each side of access to the dangerous area.
The working distance (working range) is given by the sum of the lengths of all the
access sides to the protected area. (Note that the maximum working range
between the Emitter and Receiver is reduced by 15% for each mirror used).
In the installation phase, take care to avoid twisting along the longitudinal axis of
the mirror.
Standing close to and in axis the Receiver, check that the of the
Emitter is visible on the first mirror.
It is advisable not to use more than three deflecting mirrors.