| 摘要 |
An all-reflective optical system (20) includes an entrance aperture (22), an exit aperture (24), and a dichroic beam splitter assembly (32). The dichroic beam splitter assembly (32) includes an entrance dichroic beam splitter (34) and an exit dichroic beam splitter (36). The reflected portion of the beam from the entrance dichroic beam splitter (34) passes to a first beam processing array (38) having an odd number of powered mirrors. The transmitted portion of the beam from the entrance dichroic beam splitter (34) passes to a second beam processing array (40) having an odd number of flat mirrors. The second beam processing array (40) and the first beam processing array (38) are circumferentially angularly displaced by about 90 degrees of rotation about an optical reference axis (26). The dichroic beam splitter assembly (32), the first beam processing array (38), and the second beam processing array (40) together comprise a single optical unit rotatable about the optical reference axis (26), and a bearing set (64) is provided to accomplish the rotation. |
