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Transparent-object detection

03 June 2014

Omron has introduced a transparent-object sensor specifically designed for use in the food & beverage industry. Offering better detection of objects such as glass bottles, PET bottles, transparent trays or packaging film, the E3S-DB is said to take transparent object sensing to the next level.

A high sensing stability makes the new E3S-DB sensor suitable for detecting all kinds of transparent objects. To enable high-precision detection and positioning on conveyors where the smallest of gaps between bottles exists, the sensor is also available in narrow-beam models with a convergent beam that has a focused spot size of just 2mm at a distance of 200mm.

To meet the trend towards the use of thin PET bottles in the beverage industry the sensor applies a technique known as P-Opaquing, which offers increased detection stability through special polarising filters for PET objects. Another feature is that it can automatically compensate for light-level changes caused by ambient conditions, or contamination.

The E3S-DB features an optical system that enables sensing with low hysteresis and high dynamic range. For example, it can detectjust 3% light-intensity attenuation at a distance of up to 4m.

The sensor’s advanced optical system also increases stability performance by completely cutting off even the smallest amounts of stray light that might interfere with glass bottle detection. Known as the ‘bottle-lens-effect’, this unwanted magnification of light intensity commonly causes disruption of glass-bottle detection on packaging lines that use less stable sensors.


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