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Coronagraph for astronomical imaging and spectrophotometryA coronagraph designed to minimize scattered light in astronomical observations caused by the structure of the primary mirror, secondary mirror, and secondary support structure of a Cassegrainian telescope is described. Direct (1:1) and reducing (2.7:1) imaging of astronomical fields are possible. High-quality images are produced. The coronagraph can be used with either a two-dimensional charge-coupled device or photographic film camera. The addition of transmission dispersing optics converts the coronagraph into a low-resolution spectrograph. The instrument is modular and portable for transport to different observatories.
Document ID
19870045697
Document Type
Reprint (Version printed in journal)
Authors
Vilas, Faith (NASA Johnson Space Center Houston, TX, United States)
Smith, Bradford A. (Arizona, University Tucson, United States)
Date Acquired
August 13, 2013
Publication Date
February 15, 1987
Publication Information
Publication: Applied Optics
Volume: 26
ISSN: 0003-6935
Subject Category
ASTRONOMY
Funding Number(s)
CONTRACT_GRANT: NGL-03-002-002
Distribution Limits
Public
Copyright
Other