| 摘要 |
optics. SUBSTANCE: high-speed lens includes five components, first component being negative meniscus facing image with concavity, second component being biconvex lens, third component being biconcave lens, fourth component being biconvex lens and fifth component being positive meniscus facing object with convexity. These components are arranged with relationship specified in formula of invention. Invention provides for development of high- speed lens with relative aperture not less 1: 2, angular field in space of object over 47 degrees and length of optical system less than 2.9 f' with good quality of image of point on axis and over field. EFFECT: improved functional characteristics of high-speed lens. 3 dwg |
