Fiber feed for the SDSS spectrograph

Details Fiber feed for the SDSS spectrograph Fiber feed for the SDSS spectrograph

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2198..110o&link_type=abstract

Proc. SPIE Vol. 2198, p. 110-114, Instrumentation in Astronomy VIII, David L. Crawford; Eric R. Craine; Eds.

Astronomy and Astrophysics

Astronomy

5

Scientific paper

A 640 fiber feed for a pair of moderate resolution spectrographs is being constructed for the sloan digital sky survey. The spectrograph slits, optical fibers and plug-plates are mounted together in removable cartridges. The cartridges protect the optical fibers and provide quick-change interfaces to the telescope and the spectrographs. Ten cartridges will be made to allow plugging to occur during the day. The fibers are constructed in harnesses of 20. These are mass-terminated in v- groove blocks at the spectrograph slit. At the input end the fibers are terminated in simple ferrules and manually plugged into aluminum plug-plates. The plug-plates are deformed to match the best focal surface of the telescope, and the holes are drilled to be parallel to the principal ray after bending. We describe a simple technique for drilling accurate holes.

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