Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

X-ray microscope optics resolve 50-nm features while eliminating chromatic aberrations

03.05.2017

An optical system for a full-field X-ray microscope eliminates chromatic aberrations that previously limited resolution capabilities

X-ray microscopes are commonly used in combination with full-field imaging techniques in spectromicroscopy applications, where they allow the chemical structures of materials to be analyzed and visualized simultaneously.


This is a schematic of an achromatic X-ray microscope based on total-reflection mirrors.

Credit: Osaka University

However, the performance of these microscopes is often affected by problems with chromatic aberrations-- optical effects that limit the resolution or degree of fineness to which images of the material structures can be acquired--and previous solutions to the problem have often proved difficult to manufacture and implement.

A collaborative team led by researchers from Osaka University has therefore developed an optical system for use in full-field X-ray microscopes that offers a more practical way to overcome the chromatic aberration problem.

"We developed an imaging optical system based on use of two monolithic imaging mirrors," says Assistant Professor Satoshi Matsuyama from Osaka University's Graduate School of Engineering. "These mirrors have elliptical and hyperbolic shapes on a single substrate, and fixing of the relative positioning between the ellipse and the hyperbola can provide high image quality with lasting stability."

Fabrication of this complex mirror system meant that existing manufacturing processes had to be modified, but the proposed mirror structures were produced with the required shapes to an accuracy of approximately 1 nm.

After the mirror structure was assembled using a specially developed alignment system, it was implemented in a full-field X-ray microscope system for performance testing at the SPring-8 synchrotron radiation facility.

"The microscope was tested for its spatial resolution, the presence of chromatic aberrations, and long-term stability using a fine test pattern called a Siemens star and a photon energy of approximately 10 keV," explains Professor Kazuto Yamauchi of Osaka University's Center for Ultra-Precision Science and Technology. "We were able to clearly resolve 50-nm-sized features with high stability over a period of 20 hours without any chromatic aberrations."

The developed system was then applied in X-ray absorption fine structure spectromicroscopy experiments, and successfully identified both elements and chemical states in micron-sized specimens of zinc and tungsten.

While the system will be subjected to further research to improve its performance towards the theoretical limit, it already shows considerable promise for use in a wide range of applications, including ultra-fast imaging with high-intensity X-rays and high-resolution full-field X-ray fluorescence imaging.

This mirror structure may also find use in other systems, with potential applications that include focusing and imaging optics for synchrotron radiation X-rays and X-ray-free electron lasers.

Saori Obayashi | EurekAlert!

More articles from Physics and Astronomy:

nachricht UNH scientists help provide first-ever views of elusive energy explosion
16.11.2018 | University of New Hampshire

nachricht NASA keeps watch over space explosions
16.11.2018 | NASA/Goddard Space Flight Center

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: UNH scientists help provide first-ever views of elusive energy explosion

Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.

Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...

Im Focus: A Chip with Blood Vessels

Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.

Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

Im Focus: Penn engineers develop ultrathin, ultralight 'nanocardboard'

When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure

Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Optical Coherence Tomography: German-Japanese Research Alliance hosted Medical Imaging Conference

19.11.2018 | Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

 
Latest News

New materials: Growing polymer pelts

19.11.2018 | Materials Sciences

Earthquake researchers finalists for supercomputing prize

19.11.2018 | Information Technology

Controlling organ growth with light

19.11.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>