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Proceedings Paper

Sliced-pupil grating: a novel concept for increasing spectral resolution
Author(s): E. Sánchez-Blanco; M. García-Vargas; M. Maldonado; J. Gallego; A. Gil de Paz; E. Carrasco; A. Pérez; I. Martínez-Delgado; J. Zamorano
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Paper Abstract

This paper presents the opto-mechanical design of a novel spectroscopic element - sliced pupil grating - that allows increasing the spectral resolution while keeping the instrument geometry. The concept is based on "cutting" the pupil into different slices by placing a number of prisms at the two sites of a VPH grating. The independent beams are guided through a precise opto-mechanical assembly to assure the recombination of the individual images on the detector within the available error budget, producing a single spectrum. To probe the feasibility of the concept, we have designed and manufactured a 3-slice prototype for an already-built spectrograph (Elmer, for the GTC 10-m telescope).

Paper Details

Date Published: 25 October 2011
PDF: 10 pages
Proc. SPIE 8011, 22nd Congress of the International Commission for Optics: Light for the Development of the World, 80111I (25 October 2011); doi: 10.1117/12.903186
Show Author Affiliations
E. Sánchez-Blanco, FRACTAL S.L.N.E (Spain)
M. García-Vargas, FRACTAL S.L.N.E (Spain)
M. Maldonado, FRACTAL S.L.N.E (Spain)
J. Gallego, Univ. Complutense de Madrid (Spain)
A. Gil de Paz, Univ. Complutense de Madrid (Spain)
E. Carrasco, Instituto Nacional de Astrofísica, Óptica y Electrónica (Mexico)
A. Pérez, FRACTAL S.L.N.E (Spain)
I. Martínez-Delgado, FRACTAL S.L.N.E (Spain)
J. Zamorano, Univ. Complutense de Madrid (Spain)

Published in SPIE Proceedings Vol. 8011:
22nd Congress of the International Commission for Optics: Light for the Development of the World
Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Ramón Rodríguez-Vera; Rufino Díaz-Uribe; Rufino Díaz-Uribe; Rufino Díaz-Uribe, Editor(s)

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