Using compound kinoform hard-x-ray lenses to exceed the critical angle limit
K Evans-Lutterodt1, A Stein, J M Ablett
1Brookhaven National Laboratory, Upton, New York 11973, USA. kenne@bnl.gov
Physical Review Letters
|October 13, 2007
Summary
Researchers developed a compound kinoform lens array for hard X-ray focusing. This innovation overcomes critical angle limitations, enabling nanometer-scale resolution for X-ray optics.
Area of Science:
- Optics and photonics
- Materials science
- X-ray physics
Background:
- Hard X-ray focusing is crucial for advanced imaging and research.
- Traditional lenses face limitations due to the critical angle of X-ray refraction.
- Developing novel optics is essential for achieving higher resolution in X-ray applications.
Purpose of the Study:
- To fabricate and test a compound lens system for hard X-ray photons.
- To investigate the potential of kinoform lenses for exceeding critical angle limits.
- To demonstrate a pathway towards nanometer-scale resolution X-ray focusing optics.
Main Methods:
- Fabrication of a compound lens array comprising four kinoform lenses.
- Testing the lens array's performance with 11.3 keV hard X-ray photons.
- Analysis of X-ray focusing capabilities and resolution limits.
Main Results:
- Successful fabrication and testing of the four-kinoform-lens compound lens.
- Demonstration that the compound lens exceeds the critical angle limit for X-ray refraction.
- Preservation of lens function despite exceeding the critical angle.
Conclusions:
- Compound kinoform lenses offer a viable solution for overcoming critical angle limitations in hard X-ray optics.
- This approach enables practical focusing optics for hard X-ray photons.
- The technology suggests a route to achieving nanometer-scale resolution and below for X-ray applications.
Related Concept Videos
01:16Focusing of Light in the Eye
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
01:24X-ray Imaging
German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
01:10X-ray Diffraction of Biological Samples
X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are scattered by the electron clouds around the sample atoms. The X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal crystal...
01:18Imaging Biological Samples with Optical Microscopy
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
02:18X-ray Crystallography
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...