| 摘要 |
A multi-spectral decentered catadioptric-type optical system suitable for use with long range oblique aerial reconnaissance camera systems, spectrum analyzers, astronomical imagers, and remote sensing is described. The optical system includes an aspheric primary mirror (20) receiving incident radiation and defining a central aperture. An aspheric secondary mirror (22) is provided for receiving the radiation from the primary mirror. The primary and secondary mirrors are positioned and constructed such that the entrance aperture of the system is displaced or decentered relative to the optical axis of the system so as to optimize the modulation transfer function of the optical system. An optical element (26) splits the twice reflected radiation, that may be infrared, visible or ultraviolet radiation, between first and second optical paths to first and second field optical assemblies that pass light to first and second radiation receiving devices, such as film cameras or electro-optical imagers.
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