TY - JOUR
T1 - Soft-X-ray microscope using fourier transform holography
AU - McNulty, I.
AU - Kirz, J.
AU - Jacobsen, C.
AU - Anderson, E.
AU - Howells, M. R.
AU - Rarback, H.
N1 - Funding Information:
We gratefully acknowledge the help of Steve Lmdaas and Fernando Camilo . This work was supported in part by the Air Force Office of Scientific Research, under Contract F-49620-87-K-0001, and the Department of Energy, under grant DE-FG02-89ER60858 and Contract DE-AC03-76SF00098. It was carried out at the National Synchrotron Light Source, which is supported by the Department of Energy under Contract DE-AC-02-76CH00016 .
PY - 1990/5/20
Y1 - 1990/5/20
N2 - A Fourier transform holographic microscope with an anticipated resolution of better than 100 nm has been built. Extensive testing of the apparatus has begun. Preliminary results include the recording of interference fringes using 3.6-nm X-rays. The microscope employs a charge-coupled-device (CCD) detector array of 576 × 384 elements. The system is illuminated by soft X-rays from a high-brightness undulator. The reference point source is formed by a Fresnel zone plate with a finest outer zone width of 50 nm. Sufficient temporal coherence for hologram formation is obtained by a spherical grating monochromator. The X-ray hologram intensities at the recording plane are to be collected, digitized and reconstructed by computer. Data acquisition is under CAMAC control, while image display and off-line processing takes place on a VAX graphics workstation. Computational models of Fourier transform hologram synthesis, and reconstruction in the presence of noise, have demonstrated that numerical methods in two dimensions are feasible and that three-dimensional information is potentially recoverable.
AB - A Fourier transform holographic microscope with an anticipated resolution of better than 100 nm has been built. Extensive testing of the apparatus has begun. Preliminary results include the recording of interference fringes using 3.6-nm X-rays. The microscope employs a charge-coupled-device (CCD) detector array of 576 × 384 elements. The system is illuminated by soft X-rays from a high-brightness undulator. The reference point source is formed by a Fresnel zone plate with a finest outer zone width of 50 nm. Sufficient temporal coherence for hologram formation is obtained by a spherical grating monochromator. The X-ray hologram intensities at the recording plane are to be collected, digitized and reconstructed by computer. Data acquisition is under CAMAC control, while image display and off-line processing takes place on a VAX graphics workstation. Computational models of Fourier transform hologram synthesis, and reconstruction in the presence of noise, have demonstrated that numerical methods in two dimensions are feasible and that three-dimensional information is potentially recoverable.
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U2 - 10.1016/0168-9002(90)90036-6
DO - 10.1016/0168-9002(90)90036-6
M3 - Article
AN - SCOPUS:4243833036
SN - 0168-9002
VL - 291
SP - 74
EP - 79
JO - Nuclear Inst. and Methods in Physics Research, A
JF - Nuclear Inst. and Methods in Physics Research, A
IS - 1-2
ER -