Sometimes, the limited space around the beamlines or special requirements for the aperture size makes it difficult for a standard size slit to fit into a specific instrumentation. In that case, we are able to design and produce a customized solution which is developed from our standard slit systems – but with a rectangular housing.

Just as the classic IB-slit, the aperture is defined by 4 independently movable blades (2 blades for DEMI slit systems). The blades are in turn controlled by a high-precision guiding rail system and high-resolution stepping motors. In general, specifications and options often are very similar to our standard IB-slits.

Configuration and blade material are defined by the customer. If the slit system is used at an x-ray facility, the typical blades are 2, 4, 5 or 10 mm tungsten carbide blades -  e.g. with 0.5 degrees knife-edge, R16 cylindrical edge or 90 degree rectangular edge. For neutron instrumentation, we normally use Boron Carbide. 

If it is not possible to use a standard square system in your instrumentation (the most cost effective solution), you can also check our already existing designs of rectangular slits systems here. Please contact for more information on a particular system.  

In our slit catalogue, you can have a quick overview of the large variety of JJ slit systems.

Key facts: All units in mm
CUSTOM AIR Aperture Height Length Width Comments
IB-A10x50-AIR 10x50 147 177 57  
IB-A15x75-AIR 15x75 147 292 50  
IB-A30x100-AIR 30x100 157 297 52 Blades are not fully overlapping
IB-A40x60-AIR 40x60 342.6 364.6 80 With ballscrews (33.000 moves over 10 years)
IB-A50x63-AIR 50x63 239.8 277.9 78  
IB-A50x150-AIR DEMI 50x150 222 225.8 42 2-blades version (DEMI)
IB-C60-AIR 60x60 228 228 63 Partial overlap (blades are 52,5 mm wide)
IB-A60x100-AIR 60x100 233 335 50  
IB-A15x100-AIR 15x100 111.7 321 52 Blades are not fully overlapping
IB-A30x80-AIR 30x80 127 280 52