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Multiple Object Fiber Optics Spectrograph Feed For The Hale Telescope

Tubbs, Eldred F. and Goss, Willis C. and Cohen, Judith G. (1982) Multiple Object Fiber Optics Spectrograph Feed For The Hale Telescope. In: Instrumentation in Astronomy IV. Proceedings of SPIE. No.331. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 289-295. ISBN 9780892523665.

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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.

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Cohen, Judith G.0000-0002-8039-4673
Additional Information:© 1982 Society of Photo-Optical Instrumentation Engineers (SPIE). We wish to acknowledge the contribution of Harry T. Fearnehough, who did much of the detail design and all of the mechanical fabrication. This paper has presented the results of one phase of research carried out at the Jet Propulsion Laboratory, California Institute of Technology, under Contract NAS7-100, sponsored by the National Aeronautics and Space Administration.
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Series Name:Proceedings of SPIE
Issue or Number:331
Record Number:CaltechAUTHORS:20190531-091631410
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Official Citation:Eldred F. Tubbs, Willis C. Goss, and Judith G. Cohen "Multiple Object Fiber Optics Spectrograph Feed For The Hale Telescope", Proc. SPIE 0331, Instrumentation in Astronomy IV, (16 November 1982); doi: 10.1117/12.933468;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95975
Deposited By: George Porter
Deposited On:31 May 2019 23:12
Last Modified:16 Nov 2021 17:17

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