1 June 1980 Optical Infrared Sky Survey Instrumentation
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An unusual, highly modified, Baker reflector-corrector class telescope has been adapted for wide field survey photography in the near infrared. This optical system uses a full field corrector plate and a field flattening lens to provide a flat field subtending about 4 5 on the sky. The small aperture telescope (20 inch primary) has been modified for use in the Newtonian focus configuration while preserving the optical elements of the prime focus configuration. The telescope has been further modified to accept a very large format (146 mm diameter photocathode) image intensifier camera to serve as a detector. The camera output is recorded photographically on film rather than glass plates. This unique instrument system is used in a program of sky survey photography in the optical infrared (8000 to 9000 angstrom bandpass) supplemented by visual bandpass photography. The photographs obtained with this system are of value not only for the extreme redness of the band but also because of their high resolution and their freedom from hydrogen emission.
Eric R. Craine, "Optical Infrared Sky Survey Instrumentation," Optical Engineering 19(3), 193397 (1 June 1980). https://doi.org/10.1117/12.7972526 . Submission:


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