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Stemmer Imaging’s latest camera offering, the JAI AD-081CL, features two monochrome progressive scan CCD sensors mounted to a custom-designed optical prism.

The prism-based design enables the camera to simultaneously capture two channels of 30fps video of the same field of view to within one-quarter pixel accuracy.

A choice of operating modes allows the camera to be used for high dynamic range, high-speed operation or particle-imaging velocimetry.

Particle Imaging Velocimetry (PIV) is a planar-optical technique that measures the velocity of seeded particles (1-50um in air) in the flow of interest.

Applications include vortex forming in artificial heart chambers, combustion analysis in engines and air-flow studies in wind chambers.

The AD-081CL features a PIV mode that allows the camera’s two-channel operation to capture three closely spaced images on a single trigger instead of two, providing 50 per cent more data for improved analysis of ultra-fast events.

Independent control of shutter speed and/or gain for each channel provides the opportunity for wide-dynamic-range operation.

This is especially useful in inspection applications where there is a particularly bright light background, such as LED inspection or welding.

One channel is adjusted for the bright output, while the other channel is tuned for lower light output.

The two images can then be analysed separately or combined to produce a dynamic range nearly double the normal CCD response.

This enables the camera to achieve dynamic-range levels as high as 20 bits per pixel (120dB) in a linear fashion, avoiding noise, shutter and compression issues.

The versatile AD-081CL can also operate at an effective frame rate of 60fps, which is achieved by interleaving the images from the two sensors into a single-output stream.

This high-speed/low-noise mode does not increase in the clock frequency of the camera itself, keeping clock noise to a minimum.

Each sensor has 1024 x 768 pixel resolution and 8 or 10 bit pixel depth.

The camera features two configurable Camera Link outputs, allowing single-cable operation or separate cables for each channel.

Other features include partial scanning and vertical binning capabilities, as well as analogue-video output to support auto-iris lenses.

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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