Plastic Light Guides for Direct
Detection or Through-Beam Operation
TLK70-K40-P-2000
The triangular shape of the light guide heads and
the different methods of fixing them on a base
plate enables them to be used in various applica-
tions:
- Direct detection
- Retro-reflective operation
- Through-beam operation
- Triangulation
Light guide 酶 1 mm
20 x 20
Overall height 8 mm
Direct detection
If both light guide heads are fixed
parallel
to the base plate,
then direct detection or reflex operation is possible.
A blind zone exists in front of the heads. This is larger in
reflex operation than in direct detection (diffuse reflection).
The actual size of the zone depends on the application.
Through beam operation is achieved by removing the base
plate and mounting the heads so that they are mutually
opposed on a
common
reference axis.
By loosening and changing the positions of the heads on the
base plate, the heads can be inclined at an arbitrary angle
to each other. The reference axes of the light guides then
form a triangle and objects are detected which are located
at the point of intersection of the axes.
Head
Base plate
Retro-reflective operation
Through-beam operation
Triangulation
13.01.1998
4 mm thick
Date of issue
Aluminium 2 mm thick
Subject to reasonable modifications due to technical advances.
Copyright Pepperl+Fuchs, Printed in Germany
Pepperl+Fuchs Group 路 Tel.: Germany (6 21) 7 76-11 11 路 USA (3 30) 4 25 35 55 路 Singapore 7 79 90 91 路 Internet http://www.pepperl-fuchs.com
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