eltima electronic Jokie 2, User Manual

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Functional concept
Functional concept
Reflex light barrier
The light barrier is build according to the principle of
a reflex light barrier. Sender and receiver are in the same
housing.
The IR-transmitter emits an infrared light pulse train,
which is reflected by a reflector and thus thrown back to
the receiver.
If an impulse is missing or is received very weak, for ex-
ample because an object is in the way of the light beam,
an electrical switch is closed and the connected device is
released.
This principle of function offers several advantages. First of
all only one device, the light barrier itself, needs power
supply, the other side, the reflector, is passive.
In addition the latter is very solid and easy to handle, at-
tach and camouflage. Furthermore it is possible to use any
object as reflector, for example also the subject itself.
So, in some cases, the light barrier can also be operated
without reflectors.
© eltima electronic 2013
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Image 5: reflex light barrier
Image 6: Light beam is interrupted