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Published July 1, 1990 | Published
Book Section - Chapter Open

Fiber spectroscopy at Palomar Observatory

Abstract

A new faint-object spectrograph was designed and built around the capabilities of fiber optics. This instrument, the Norris Spectrograph, is designed exclusively for the Cassegrain focus of the Hale Telescope. There are 176 indpendently positionable fibers, each with an aperture 1.5 arcsec in diameter. These 176 probes cover a field of view of diameter about 20 arcmin. The output ends of the fibers are collimated with a spherical mirror, dispersed using a normal reflection grating, and focused onto a 2048 x 2048 CCD using all-transmissive optics. The peak overall efficiency of the instrument will be in excess of 10 percent.

Additional Information

© 1990 Society of Photo-Optical Instrumentation Engineers (SPIE). 1 July 1990. This instrument was fully funded by The Norris Foundation. Their interests and contributions are most gratefully acknowledged. Jim Westphal was most helpful in allowing use of his lab during the final construction stages of the spectrograph.

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