Ellipsoidal and Paraboloidal Mirror (2D Focusing X-ray Mirror for Synchrotron Radiation)

The ideal mirror shape for focusing X-rays from a point source is ellipsoidal. While a KB mirror is a 2D focusing optical system using two elliptical mirrors arranged vertically and horizontally, an ellipsoidal mirror achieves 2D focusing with just a single mirror featuring a 3D surface profile. Compared to a KB mirror that requires two reflections, an ellipsoidal mirror needs only one, yielding higher focusing efficiency. Additionally, the absence of a second reflection simplifies optical alignment for users. However, ellipsoidal mirrors feature steep curvatures, particularly sagittal to the incident X-rays, making high-accuracy measurement significantly more challenging than for other mirror profiles. JTEC has developed a 3D shape measurement system capable of highly accurate metrology even for such steep curvatures. Through our proprietary fabrication process, we deliver high-precision ellipsoidal mirrors to major synchrotron radiation facilities worldwide.