14
Functional principle of the joker² light barrier system
Copyright eltima electronic 2022
The reflectors
The scope of delivery of the jok
e
r
²
light barrier system includes three 8 cm
retro-reflectors. They consist of a circular plate with many honeycomb cor-
ner reflectors.
Corner reflectors have the prop-
erty that they reflect light back to
its source with a minimum of off-
set. Figure 14 shows the operating
principle of a corner reflector.
Due to this property a retro reflec-
tor, in comparison to a mirror, does
not need to be aligned exactly to-
wards the light barrier. It is suffi-
cient to be aligned roughly towards
the light barrier. Only for reaching
the maximum working distance
does the reflector need to be aligned exactly.
Figure 14: Corner reflector