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Interference Mirror for Soft X Rays

IP.com Disclosure Number: IPCOM000089184D
Original Publication Date: 1977-Sep-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Jach, TJ: AUTHOR

Abstract

This mirror reflects soft X-rays over a continuous range of angles of incidence (specular) with high reflectivity. It may be bent to form an optical element at X-ray wavelengths.

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Interference Mirror for Soft X Rays

This mirror reflects soft X-rays over a continuous range of angles of incidence (specular) with high reflectivity. It may be bent to form an optical element at X-ray wavelengths.

The mirror can reflect X-rays in a wavelength region of about 10 Angstroms- 100 angstroms. It consists of multiple interference layers and reflects specularly. The reflectivity peaks for a given wavelength at a specified angle of incidence.

The mirror consists of a single crystal of a transition metal dichalcogenide which has been "intercalated" with an appropriate chemical compound (organic or inorganic).

The interference layers are actually the planes of a crystal. Previous attempts at fabricating multiple interference coatings for the soft X-ray region have been limited by tolerances for thickness and spacing which are beyond the state of the art. This is automatically determined in the crystal. Hundreds or thousands of interference layers are therefore possible.

The mirror can be fabricated to reflect X-rays at any angle of incidence from 0 Degree-90 Degrees. The reflectivity of the mirror is potentially high - as much as 30% for normal incidence. By bending the crystal or fabricating it on a curved substrate, a mirror of positive or negative focal length is possible. This permits the construction of geometrical optical devices at soft X-ray wavelengths, such as microscopes and telescopes.

The preferred crystal is a transition metal dichalcogenide,...