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System Solutions

USB 3.0 Frame Grabbers

CUG2048-CLS


Unique Cronitum grabbers features

Crontium frame grabbers provide a unique combination of a rarely met in with a single grabber features. Some of them are available only on a very expensive grabbers, some are completely specific to just a Crontium grabbers.

Direct camera connection

Crontium Camera Link frame grabbers designed to be connected directly to the camera, completely eliminating this way a need for bulky and expensive Camera Link cables. In case of higher than "base" Camera Link configuration, the Cronium flexible design allows to accommodate the available Camera Link cameras with an arbitrary inter-center distance between Camera Link connectors.
CamWithGrabAlso, some types of our grabbers support fast-switchable dual camera interface within the same grabber unit. The example of such a grabber, CGX-1F-LS, is shown in the picture, where you can see this grabber directly plugged in to a high-speed linescan camera from DALSA.





Encoder division factor.


It is often the case that the external encoder signal's frequency is too high to be handled by a camera.
Let's take an example of a typical linescan camera with a maximum line rate of 18K lines/second. If for technical reasons the 5000-pulse encoder had to be mounted on cylinder size of 120 mm and the material is running at speed of 280 m/min, then the encoder cylinder rotates at angular speed of 12.379 rev/second. This transforms into encoder frequency of 61.894 KHz, which is 3.439 times higher than the allowed camera clocking. Therefore, to preserve maximum camera resolution and not overclocking the camera at the same time, the encoder signal should be divided by the exactly same factor: 3.439. Most of the available in the market grabbers, would allow you in this case to divide the encoder signal by an integer factor, i.e. by either of 1, 2, 3, 4, 5, ... and so on.
The closest integer division factor we need in our example (that still does not overclock the camera) is 4. However, if we use such a divider then we under-clock the camera by about 16.3%, reducing our image resolution by the same amount.

The Crontium grabbers allow you choosing a fractional division factor, as accurate as 0.1%. Hence, for our example, the exact division factor of 3.439 can be supplied to the grabber, maintaining this way a maximum camera line rate and scanning resolution.

Multiple cameras synchronization.

In many application (web inspection, PCB inspection, security, medical...) it is required that many cameras work in parallel and asynchronously, imaging different parts of the inspected object yet delivering data simultaneously.
In this case it is very important to reconstruct the image on processing unit side in such a way that all the frames from all the cameras appear to the viewer and/or processing images in sync. In the other words, if our image contains a frame number N from camera 1, we must be sure that this image contains also very same frame N form all the rest of cameras in the system. If the latter is not the case, we would observe different undesired artifacts, like let's say if long horizontal strip passed under all the cameras, the parts of that strip will be shown in different frames, thus giving incorrect picture of what had happened, presenting images of partial strip from different cameras at different times (frames).
Crontium grabbers and its image acquisition engine allow you to easily reconstruct image in such a way, that multiple cameras will be always synchronized on processing unit side. In other words, it insures that the combined of several cameras image always contains frames, acquired by the same frame trigger.

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Info

Crontium stocks only very limited number of the devices. Usually only evaluation samples are available out of shelf.

Please contact Crontium for further information on quotes and lead time for a higher volumes.

Usual lead time is about 4 to 8  weeks, depending on order quantity and level of required  customizations.

Licensing

In order to use parts or whole of corresponding grabber's IP in your own products, please contact Crontium to obtain one of our manufacturing licenses.