A large field-of-view high-resolution hard x-ray microscope using polymer optics

Area of Science:

• X-ray microscopy
• Optical physics
• Materials science

Background:

• Current x-ray microscopy often faces limitations in spatial resolution and field of view.
• Developing compact and high-resolution imaging systems is crucial for advanced materials and biological studies.

Purpose of the Study:

• To present an effective approach for building a compact full-field x-ray microscope with high spatial resolution.
• To demonstrate the capabilities of a novel polymer-based lens system for x-ray imaging.

Main Methods:

• Utilized a matched pair of polymer-based condenser-objective lenses.
• Employed a unique condenser with high-aspect-ratio prisms for uniform, multi-angle illumination.
• Designed an objective with interdigitated one-dimensional lenses.
• Characterized lens performance using Talbot grating interferometry.
• Obtained images using a 20 keV x-ray source, short exposures, and cross-correlation image registration.

Main Results:

• Achieved a uniform spatial resolution of 240 nm (smallest resolvable line pair) over a large field of view (80 × 80 µm²).
• Demonstrated distortion-free imaging by overcoming vibrational instabilities.
• Characterized excellent focusing properties and minimal wavefront distortions of the polymer lenses.
• Compared results favorably against commercial two-dimensional parabolic lenses with smaller fields of view.

Conclusions:

• The developed polymer-based lens system offers a significant advancement in compact, high-resolution x-ray microscopy.
• This approach enables fast, distortion-free imaging of mesoscopic phenomena in real space.
• Integration with diffractometers can facilitate complementary real-space and reciprocal-space studies on the same instrument.