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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 27, Iss. 16 — Aug. 15, 1988
  • pp: 3503–3510

Imaging extreme ultraviolet spectrometer employing a single toroidal diffraction grating: the initial evaluation

M. C. E. Huber, J. G. Timothy, J. S. Morgan, G. Lemaitre, G. Tondello, E. Jannitti, and P. Scarin  »View Author Affiliations


Applied Optics, Vol. 27, Issue 16, pp. 3503-3510 (1988)
http://dx.doi.org/10.1364/AO.27.003503


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Abstract

A high-efficiency extreme ultraviolet (EUV) imaging spectrometer has been constructed and tested. The spectrometer employs a concave toroidal grating illuminated at normal incidence in a Rowland circle mounting and has only one reflecting surface. The toroidal grating has been fabricated by a new technique employing an elastically deformable submaster grating which is replicated in a spherical form and then mechanically distorted to produce the desired aspect ratio of the toroidal surface for stigmatic imaging over the selected wavelength range. The fixed toroidal grating used in the spectrometer is then replicated from this surface. Photographic tests and initial photoelectric tests with a 2-D pulse-counting detector system have verified the image quality of the toroidal grating at wavelengths near 600 Å. The results of these initial tests are described in detail, and the basic designs of two instruments which could employ the imaging spectrometer for astrophysical investigations in space are briefly described, namely, a high-resolution EUV spectroheliometer for studies of the solar chromosphere, transition region, and corona and an EUV spectroscopic telescope for studies of nonsolar objects.

© 1988 Optical Society of America

History
Original Manuscript: February 2, 1988
Published: August 15, 1988

Citation
M. C. E. Huber, J. G. Timothy, J. S. Morgan, G. Lemaitre, G. Tondello, E. Jannitti, and P. Scarin, "Imaging extreme ultraviolet spectrometer employing a single toroidal diffraction grating: the initial evaluation," Appl. Opt. 27, 3503-3510 (1988)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-27-16-3503

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