| 摘要 |
The invention provides a highly corrected catadioptric telephoto lens comprising in succession, from the long conjugate end, an aspherized negative meniscus corrector plate, a Mangin type primary mirror which directs light to a secondary mirror comprising the central portion of the second surface of the corrector lens, a first positive meniscus corrector lens and a second biconcave corrector lens. The relative aperture is f/8 and the overall length of the system from first vertex to image plane is less than 0.4 focal length.
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