Abstract
Fourier transform x-ray holography has been used to image gold test objects with sub-micrometer structure, resolving features as small as 60 nanometers. The hologram-recording instrument uses coherent 3.4-nanometer radiation from the soft x-ray undulator beamline X1A at the National Synchrotron Light Source. The specimen to be imaged is placed near the first-order focal spot produced by a Fresnel zone plate; the other orders, chiefly the zeroth, illuminate the specimen. The wave scattered by the specimen interferes with the spherical reference wave from the focal spot, forming a hologram with fringes of low spatial frequency. The hologram is recorded in digital form by a charge-coupled device camera, and the specimen image is obtained by numerical reconstruction.
Original language | English (US) |
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Pages (from-to) | 1009-1012 |
Number of pages | 4 |
Journal | Science |
Volume | 256 |
Issue number | 5059 |
DOIs | |
State | Published - Jan 1 1992 |
ASJC Scopus subject areas
- General