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Stemmer Imaging is offering JAI’s LQ-200CL prism-based 4-CCD colour linescan camera, which can be used for fruit and vegetable sorting and the surface inspection of flat panels and displays.

Capable of the simultaneous imaging of near-infrared (NIR), red (R), blue (B) and green (G) light through four independent channels but the same optical path, the LQ-200CL enables the identification of an even wider set of defects (including subsurface imaging) on inspected objects.

NIR imaging allows features below the surface of an object to be viewed, thus providing different information to the RGB channels and revealing imperfections that the human eye cannot see.

Further linescan applications include food inspection, web inspection (wood, textile, paper and glass), tile inspection, 2D and 3D print inspection and PCB inspection.

The camera’s dichroic prism-block technology splits the incoming light into the four non-overlapping spectral band onto four separate CCD sensors with excellent pixel-to-pixel alignment, ensuring that the R, G, B and NIR pixels see exactly the same point on the object at all times.

This produces high-quality and perfectly aligned linescan images independent of the viewing angle to the inspected object, independent of variations on conveyer belt speed and independent of whether the object has a wavy or curved texture.

This precise image alignment and colour registration makes inspection systems featuring these cameras faster and easier for end users to set up, calibrate and maintain, according to Stemmer.

Each of the four CCD sensors provides 2,048 linear pixels with a pixel size of a 14 x 14um square.

The camera runs at a maximum scan rate of 19,048 lines per second with a 40MHz pixel clock, delivering a high signal-to-noise ratio of 58dB.

Built-in pre-processing functions include flat-field correction and gamma/gain correction, which, together with the electronic shutter can be set individually for the R, B, G and NIR channels.

The gamma/gain correction function also allows users to take full advantage of the sensors’ dynamic range to optimise the image.

STEMMER IMAGING is Europe’s largest imaging technology provider with headquarters in Germany and subsidiaries in the United Kingdom, France and Switzerland.

Image processing or Machine Vision is used in many different application areas – such as industrial automation, medical imaging, security and traffic technology – as a powerful and cost effective way of implementing automatic quality assurance. Even at high speeds and with stringent accuracy requirements, image processing allows 100% monitoring and thus strengthens the competitive edge of those companies using it.

STEMMER IMAGING customers have access to a wide variety of imaging products from the worlds leading manufacturers. These manufacturers represent the cutting edge of vision technology which is something that is unique in Europe. STEMMER IMAGING are the developers of the world’s leading image processing software platform, Common Vision Blox, and as a manufacturer of customer-specific products, we have a full range of in-house expertise to draw on, allowing us to supply the best possible service to our customers when choosing an imaging solution. STEMMER IMAGING does not produce turn-key solutions – instead, using our close partnerships with a large number of experienced system integrators, we can provide expert technical know-how for the planning, integration and realisation of complete solutions.

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