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Image-Slicers

Published online by Cambridge University Press:  12 April 2016

E.H. Richardson ,
J.M. Fletcher  and
W.A. Grundmann
E.H. Richardson
Affiliation:
Dominion Astrophysical Observatory, 5071 West Saanich Road, Victoria, BC, V8X 4M6, Canada
J.M. Fletcher
Affiliation:
Dominion Astrophysical Observatory, 5071 West Saanich Road, Victoria, BC, V8X 4M6, Canada
W.A. Grundmann
Affiliation:
Dominion Astrophysical Observatory, 5071 West Saanich Road, Victoria, BC, V8X 4M6, Canada

Extract

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The diameter of stellar images produced by Earth-based telescopes often exceeds the width of the entrance slit of the associated spectrograph. It is not uncommon for more starlight to be wasted on the jaws of the slit than is transmitted by the slit. The purpose of an image-slicer is to redirect the light from the slit jaws into the slit; to do so, the length of the slit illuminated by starlight must be increased, either by stacking slices of the image along the slit, or by elongating the image and superimposing full-length slices of it. Thus, in order to work, an image-slicer of whatever type must lose spatial resolution of the sky along the slit.

Type
IV. Instrumentation - Components
Information
International Astronomical Union Colloquium , Volume 79: Very Large Telescopes, their Instrumentation and Programs , 1984 , pp. 469 - 492
Copyright
Copyright © ESO 1984

References

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4. Richardson, E.H., U.S. Patent 3,510,203, May 1970.CrossRefGoogle Scholar