Contrast sensor uses RGB processing
July 2010
ifm electronic’s
new high performance O5 Photoelectric Contrast Sensor offers a variety of
contrast sensing solutions for the packaging, assembly, material handling and
printing industries.
One of the
challenges in detecting registration marks or printed colour bars is determining
the difference between the target and background – especially when the colours
are similar.
The O5 sensor
features an RGB visible light transmission LED that processes through red, green
and blue to identify the best colour for contrast between the target and the
background such as registration marks on labels, and print markings on boxes.
The sensor also offers an inexpensive solution to more expensive vision and
identification systems designed for contrast applications.
With 1 kHz
switching frequency for high-speed applications, the O5 sensors have an 18 to
22ﾠmm sensing range with high-colour contrast sensitivity and resolution. The
sensors are ideal for flat objects such as labels and its compact size fits in
applications with limited mounting space. For maximum flexibility, the connector
rotates 270° for alignment in multiple directions.
Additional
features include auto-detect for PNP/NPN configuration, and the simple ‘Teach
Mode’ setup quickly establishes application parameters. A wide variety of
mounting brackets for installation flexibility are available.
Typical
applications include printed registration marks on a roll of paper or labels,
continuous-form marking, printed colour bars on packages, reference marks for
printing/cutting and to confirm presence of bar codes, date codes and data
matrix symbols.
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