| 摘要 |
The present invention provides an optical apparatus comprising an objective lens system for focusing optical radiation from a scene or object into an intermediate image and having at least one lens element which imposes a substantial degree of negative distortion on the intermediate image; a secon d lens system for focussing optical radiation from the intermediate image into a final image; an aperture stop for limiting the optical radiation forming the final image,the aperture stop being located between the final image region i n which the final image is formed or to be formed, and the lens element of the second lens system most distant from the final image region.
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