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Angle characteristics (Left and right)
Angle characteristics (Up and down)
“Receiver output – Sensing distance characteristics” is the most suitable
graph to understand the sensing ability of optical sensors. The vertical
axis of this graph shows excess gain of receiver output. Excess
gain 1 is equal to the threshold level of the sensor.
According to the graph of B5W-LB21, the detectable area for black
paper is the distance from the crossing point of excess gain 1 and
the characteristic curve to the other crossing point.
When the sensing ability is verified in your actual application,
it is important to use testing objects which have lower reflective
characteristics or are smaller than the actual objects for long term and
stable sensing.
Black paper
Detectable area
Reference value
Reference value
Reference value
Reference value
Reference value
B5W-LB Light convergent reflective type sensor User’s manual (E592)
5.2 Digital output model
Receiver output – sensing
distance characteristics
Operating range (Up and down)
Operating range (Left and right)
Please see “Operating range characteristics” (reference value) below. The curve in this graph shows
operating points (turn OFF to ON with Light –ON type) when an object to be sensed travels in the arrow’s
direction for each sensing distance.
In the case of detecting moving objects, a reflective type sensor is generally mounted vertically to the
surface on which the light emitting axis and the light receiving axis are crossing (equal to “Left and right” direction) .
As described in section 5.1 analog output model, it is important to consider the mounting direction of the
sensor when detecting glossy objects. Please refer to “Angle characteristics” of the digital output models below.
The characteristic curves show operating points (turn OFF to ON with Light –On type) when a tilted object is
traveling to the sensor.
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