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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 23, Iss. 24 — Dec. 15, 1984
  • pp: 4518–4522

Aspheric concave grating spectrographs

Webster C. Cash, Jr.  »View Author Affiliations


Applied Optics, Vol. 23, Issue 24, pp. 4518-4522 (1984)
http://dx.doi.org/10.1364/AO.23.004518


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Abstract

Modifications to the surface of ellipsoidal gratings with straight rulings have been investigated. We find that with the addition of a term proportional to wl2 the stigmatic Rowland circle geometry can be greatly improved. We also show that with the addition of a term proportional to w3, comatic aberration can be corrected, and geometries outside the Rowland circle become well behaved. The modifications require only a few microns of figuring polish away from the nominal ellipsoid. Fabrication of these gratings is well within the capabilities of modern optics.

© 1984 Optical Society of America

History
Original Manuscript: August 9, 1984
Published: December 15, 1984

Citation
Webster C. Cash, "Aspheric concave grating spectrographs," Appl. Opt. 23, 4518-4522 (1984)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-23-24-4518

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