LENS CASINGS

In general, a refractive lens system will contain many individual lenses in a stack. In order to achieve optimum performance for focusing and imaging it is necessary to align the optical axes of the individual lenses in a stack with submicrometer precision. Furthermore, during operation the lens stack must be installed in vacuum. We provide high precision lens casings that can be integrated in the vacuum of a beamline.

X-ray lens casing
Fig. 1. Top view of a lens casing.
X-ray lens casing
Fig. 2. Front view of a lens casing

Figure 1 shows the top view of a lens casing with two KF25 flanges for integration into the vacuum-system of a beamline. The flanges and the cover have Viton O-rings. The photograph shows a casing for an inset with 100 mm length for the lenses. In Figure 2 is shown the front view of a lens casing with two screw holes for attachment of the casing to a support. The rear side has two similar screw holes.

X-ray lens casing
Fig. 3. Side view of the lens casing with a KF25 flange.

Figure 4 shows two insets for a lens casing for a lens stack of up to 100 mm length. The upper inset is for 2D-lenses, the lower one for 1D-lenses. Note that the lens frames are identical for all 2D-lenses and, respectively, also for all 1D-lenses, independent of the radius of curvature R. In Figure 5 is shown the front view of the insets for 1D-lenses (left) and 2D-lenses (right). The central hole is for the x-ray beam in the operation mode. The upper hole for the 1D-lenses (12 mm above the central hole) is for alignment purposes. The insets for 2D-lenses have 4 additional alignment holes, three at 7 mm and one at 12 mm from the central hole. The backside of the inset has an identical hole pattern.

Insets for x-ray lens casings
Fig. 4. Two insets for a lens casing
Insets for x-ray lens casings
Fig. 5. Front view of the insets

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