Complete alignment of a KB-mirror system guided by ptychography

Area of Science:

• Optics and Photonics
• Materials Science
• Nanotechnology

Background:

• High-quality Kirkpatrick-Baez (KB) mirror systems are crucial for focusing beams in advanced scientific instruments.
• Precise alignment of KB mirrors is essential for minimizing optical aberrations and achieving optimal beam quality.
• Existing alignment methods can be complex and time-consuming, requiring sophisticated techniques to correct for subtle misalignments.

Purpose of the Study:

• To demonstrate a novel method for aligning individual mirrors within a Kirkpatrick-Baez (KB) system.
• To achieve an optimally focused beam by minimizing aberrations in the phase of the ptychographically reconstructed pupil function.
• To provide a catalog of aberration artifacts to facilitate the identification and correction of KB mirror misalignments.

Main Methods:

• Utilizing ptychography to reconstruct the pupil function of the KB mirror system.
• Analyzing the phase information of the reconstructed pupil function to identify aberrations.
• Experimentally inducing and characterizing different sources of mirror misalignment at the NanoMAX diffraction endstation.

Main Results:

• Successfully demonstrated the alignment of individual KB mirrors by minimizing phase aberrations.
• Identified distinct phase artifacts corresponding to specific types of mirror misalignments.
• Presented experimental results showcasing the effectiveness of the developed alignment technique.

Conclusions:

• The presented method enables precise alignment of KB mirrors for optimal beam focusing.
• The catalog of aberration artifacts serves as a practical guide for diagnosing and correcting KB mirror system misalignments.
• This work contributes to the advancement of high-resolution beam focusing techniques in scientific research.