X-ray detector device and device for the X-ray inspection of products, in particular foodstuffs

A device for the X-ray inspection of products, the device including:

• (a) a radiation-generating device with at least one X-ray source for generating X-radiation with a selected spectral width, wherein the X-radiation is transmitted in a transmission direction through a product moving in a movement direction and movement speed relative to the X-radiation;
• (b) a first line detector with a first discrete spatial resolution, the first line detector being operable to detect X-radiation at discrete locations along a first capture line extending along a capture width transverse to a movement direction of relative movement between a product being examined and the first line detector, the detection by the first line detector being non-spectrally resolved so as to generate first image data including one grayscale value for each discrete location along the first capture line;
• (c) a second line detector with a second discrete spatial resolution less than or equal to the first discrete spatial resolution, the second line detector being operable to detect X-radiation at discrete locations along a second capture line extending along the capture width parallel to the first capture line, the detection by the second line detector being spectrally resolved so as to generate second image data including for each discrete location along the second capture line a number of channel values where each channel value represents the X-ray quanta detected within a different respective energy range;
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• (d) an evaluation and control unit connected to receive the first image data and second image data or data derived from the first image data and data derived from the second image data, the evaluation and control unit being operable to combine information from the first image data with information from the second image data to detect, with at least the first discrete spatial resolution, a feature of the product being examined.