Physics – Optics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apopt..31.3744g&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 31, no. 19, July 1, 1992, p. 3744-3749.
Physics
Optics
22
Aberration, Gratings (Spectra), Holography, Rowland Circles, Ultraviolet Spectrometers, Degrees Of Freedom, Far Ultraviolet Radiation, Spectral Resolution
Scientific paper
A numerical minimization method is used to design a Rowland holographic spherical grating that is recorded with two stigmatic laser sources. The method aims at simultaneously reducing all aberrations up to fourth order over a significant spectral range. In the context of a high spectral resolution, far-ultraviolet spectrograph, an original solution is found that implies a nonclassical recording geometry with one virtual source. This solution satisfies the requirement of a resolving power of about 30,000 with the unquestionable advantage of manufacturing and testing simplicity. Finally, another example, which is obtained in a different context, shows that the properties of this recording geometry probably have a general applicability.
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