A novel lobster-eye imaging system based on Schmidt-type objective for X-ray-backscattering inspection

Area of Science:

• Optics and Imaging
• X-ray Technology
• Materials Science

Background:

• X-ray backscattering inspection requires high-resolution imaging systems.
• Traditional imaging systems face limitations in resolution uniformity.
• Lobster-eye optics offer a unique approach to wide-field X-ray imaging.

Purpose of the Study:

• To develop and evaluate a novel lobster-eye imaging system for X-ray backscattering inspection.
• To enhance resolution uniformity in both vertical and horizontal directions.
• To achieve a spatial resolution of approximately 3 mm for practical applications.

Main Methods:

• Modification of Schmidt geometry into a treble-lens structure.
• Ray-tracing simulations to predict resolution characteristics.
• Optical testing of the lobster-eye imaging system components.
• X-ray backscattering imaging experiments with polymethyl-methacrylate objects.

Main Results:

• The treble-lens Schmidt objective demonstrated similar resolution in vertical and horizontal directions.
• A spatial resolution of approximately 3 mm was achieved with a 200 mm field of view and 500 mm object distance.
• The system operates effectively over a wide range of photon energies up to 100 keV.

Conclusions:

• The developed lobster-eye X-ray imaging system, particularly with the treble-lens Schmidt objective, significantly improves resolution uniformity.
• This novel system provides a practical solution for high-resolution X-ray backscattering inspection.
• The findings support the potential of lobster-eye optics for advanced X-ray imaging applications.