| 摘要 |
A compact, high numerical aperture, high resolution, ultra-wide field of view concentric scanning optical sensor. In a most general embodiment, the inventive optical arrangement (10) includes an at least semi-spherical lens (14) having a base; a reflective surface (16) centered at a center of said base and parallel thereto; and an array (20) of detectors dispose to receive electromagnetic energy received through said lens and reflected by said surface. In the illustrative embodiment, the semi-spherical lens is a ball lens (14). The reflective surface is aspheric and designed to effect aberration correction. A mechanism (19) is included for rotating the ball lens (14) causing the system to scan. A dome lens (18) is disposed over the ball lens and concentric therewith. Electromagnetic energy is received through the dome and ball lenses and reflected by the mirror to the detector array. A field lens assembly (21) is disposed between the detectors and the mirror. The field lens assembly allows for the use of flat piece-wise sensor chip assemblies (SCAs). The use of flat SCAs allows the system to have the compact advantages of a concentric system without the need of expensive curved focal surface array.
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