Statistics – Applications
Scientific paper
Mar 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976s%26w....15...86s&link_type=abstract
Sterne und Weltraum, vol. 15, Mar. 1976, p. 86-91. In German.
Statistics
Applications
Astronomical Spectroscopy, Diffraction Patterns, Holographic Interferometry, Interference Grating, Spectroscopic Telescopes, Concavity, Fourier Analysis, Laser Outputs, Light Scattering, Monochromatic Radiation, Spectrum Analysis, X Rays
Scientific paper
The paper reviews the basic principle and discusses important applications of holographic diffraction gratings, which are obtained by transferring the high division precision of an interference field into a spatially and temporally stable, high-resolution storage medium. In practice, this is achieved by illuminating a photoresist layer with a laser-produced interference pattern, followed by developing the layer in a suitable solvent into a transmission grating. The high-resolution properties, symmetric instrument profile, and pure, ghost-free spectra of holographic gratings are underlined. The principle of a holographic concave grating with nonequidistant grooves and three stigmatic points is illustrated. The holographic technique can also be used to produce a toroidal X-ray grating for grazing incidence, with which the strong astigmatism of normal Rowland gratings can be greatly reduced, increasing the energy density in the spectrum by a factor of 30.
Rudolph Daniel
Schmahl G.
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