Physics – Optics
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apopt..30..801c&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 30, March 1, 1991, p. 801-806.
Physics
Optics
10
Aberration, Far Ultraviolet Radiation, Gratings (Spectra), Holography, Ultraviolet Spectrometers, Astigmatism, Diffraction Propagation, Grooves, Rowland Circles, Spectrographs
Scientific paper
Two approaches to reducing optical aberrations of concave grating spectrographs have been used, holographically controlling the groove curvature and spacing and reshaping the optical substrate while ruling the grooves conventionally. The latter approach, slightly deforming an ellipsoidal grating blank, can lead to diffraction-limited performance at a single FUV wavelength. When such a grating is used in a slitted Rowland circle spectrograph, the result is an extremely efficient spectrograph with spectral resolving power of about 30,000 and low astigmatism. Optical fabrication technology has advanced to the point where these exotic surface gratings are becoming practical.
Content David
Dávila Pam
Trout Catherine
Wilson Mark
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