Capillary lens


The J12818-01 focusing capillary lens is a focusing optics for X-rays, consisting of a bundle of numerous hollow glass capillaries formed into a cylindrical shape with its ends gently tapered. This product utilizes total reflection of X-rays on the inner wall of each capillary to focus X-rays emitted from an X-ray source to a small spot.


Collimated X-ray image


Schematic diagram of X-ray collimating



X-ray fluorescence (XRF)



Parameter Description / Value Unit
Operating X-ray energy (recommended) 3 to 25 *1 keV
Input focal length 70±10 mm
Output focal length 5±2 mm
Focusing size (FWHM)(Typ.) 20 μm
Gain(Min)@Cu-Kα (8.0 keV) *2 10,000 -
Operating ambient temperature 0 to +50
Input / output window material Polyimide film -
Housing case material Stainless steel -

*1 Compatible with less than 3 keV when input/output windows are removed.
*2 Compared with a pinhole of the same size as the focusing size, placed at the focus position.An X-ray source with a focal spot size of 20 μm is used.

Optical dimensions (Unit mm)

Dimensional outlines (Unit mm)

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