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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 16 — Jun. 1, 2001
  • pp: 2778–2787

Grazing-incidence telescope–spectrograph for space solar-imaging spectroscopy

Luca Poletto and Giuseppe Tondello  »View Author Affiliations


Applied Optics, Vol. 40, Issue 16, pp. 2778-2787 (2001)
http://dx.doi.org/10.1364/AO.40.002778


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Abstract

The design of a stigmatic grazing-incidence instrument for space applications to solar-imaging spectroscopy is presented. It consists of a double telescope and a spectrograph: Telescope I consists of a single cylindrical mirror with parabolic section, focusing the radiation on the entrance slit of the spectrograph in the spectral dispersion plane; telescope II consists of two cylindrical mirrors with aspherical section in a Wolter configuration, focusing the radiation on the spectrograph focal plane in the direction perpendicular to the spectral dispersion plane. The spectrograph consists of a grazing-incidence spherical variable-line-spaced grating with flat-field properties. Telescope II is crossed with respect to the grating and telescope I; i.e., it is mounted with its tangential planes coincident with the grating equatorial plane. The spectrum is acquired by a detector mounted at near-normal incidence with respect to the direction of the exit beam. The spectral resolution is also preserved for off-axis angles. The effective collecting area of the instrument can be preserved by adoption of a nested configuration for telescope II without degradation of the spectral resolution.

© 2001 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(110.6770) Imaging systems : Telescopes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(220.1000) Optical design and fabrication : Aberration compensation
(300.6560) Spectroscopy : Spectroscopy, x-ray
(340.7440) X-ray optics : X-ray imaging

History
Original Manuscript: July 25, 2000
Revised Manuscript: March 8, 2001
Published: June 1, 2001

Citation
Luca Poletto and Giuseppe Tondello, "Grazing-incidence telescope–spectrograph for space solar-imaging spectroscopy," Appl. Opt. 40, 2778-2787 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-16-2778


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