Abstract
Established telescope designs used in the infrared-wavelength region are not responsive to the specific imaging requirements of this wavelength interval. A Gregorian telescope using off-axis mirror segments, and a real focus for the cold stop placement is proposed for the detection of faint IR sources. Exact ray trace equations are given for a general ray propagating through two coupled confocal spheroids. Relationship between the spheroid mirror parameters and object, and image distances are presented in a graphical form to facilitate the first order telescope design.
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