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Proceedings Paper

Multiple Object Fiber Optics Spectrograph Feed For The Hale Telescope
Author(s): Eldred F. Tubbs; Willis C. Goss; Judith G. Cohen
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Paper Abstract

A preliminary design of a fiber-optics feed for the prime-focus spectrograph of the Hale telescope using computer controlled movable fiber has been completed and a test of a proto-type configuration carried out. The complete design will divide a 76mm square field into 10 strips and will place two movable fibers in each strip. The fiber pickups, which are moved by stepper-motor driven lead screws, may be placed anywhere in the strip subject to the limitation that they not pass each other. The prototype consisted of a single strip with two fibers operated with manual input to the stepper motors. In tests performed at the 5 meter Hale telescope in April of 1981 spec-tra of two bright 0 stars (B = 8.5 mag) separated by 5 arc minutes were photographed with a 3 minute exposure using a 1200 line/mm grating and unbaked 103a0 plates. The performance of the prototype configuration was within a factor of two of the unmodified prime-focus spec-trograph indicating a potential for a ten-fold increase in the effective utilization of the telescope for spectrographic survey work when fitted with the 20-fiber feed.

Paper Details

Date Published: 16 November 1982
PDF: 7 pages
Proc. SPIE 0331, Instrumentation in Astronomy IV, (16 November 1982); doi: 10.1117/12.933468
Show Author Affiliations
Eldred F. Tubbs, California Institute of Technology (United States)
Willis C. Goss, California Institute of Technology (United States)
Judith G. Cohen, California Institute of Technology (United States)

Published in SPIE Proceedings Vol. 0331:
Instrumentation in Astronomy IV
David L. Crawford, Editor(s)

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