SU1525653A1 - Speed photographic telephoto lens - Google Patents

Abstract

The invention is intended for a camera of the type "Zenith". The aim of the invention is to improve the image quality, reduce distortion and reduce the size of the lens. The lens consists of four components, the first of which contains successively located single double-convex 1, convex-flat 2 and convex-concave 3 lenses, the second component - negative 4 and positive 5 menisci, facing with concavity to the image, the space between which is filled with liquid 6 with a special course of dispersion, and a negative meniscus 7 of low optical power, facing the concavity of the image, the third component is made of glued positive meniscus 8, convexity facing the image, and d about kovognutoy lens 9, a fourth component - biconvex lens 10. The 1-yl.

Description

W 65 IS

10 N

:

31525653

This invention relates to optical

systems, in particular, to long-focus aperture telephoto lenses with an internal focusing device, and can be used in Zenit type mirror cameras, for Koti amateur and professional photography.

The purpose of the invention is to improve the image quality, reduce distortion and reduce size.

The drawing shows the principal optical scheme of the proposed thermal lens,

A telephoto lens consists of four components. The first component contains successively located single double convex lens 1, a convex-flat lens 2, and a negative meniscus 3 facing in with an image. The second component contains successively located negative meniscus and positive meniscus 5, facing by concavity to

optical lens length L 2k3 mm;

distortion value of 0.7b%; the magnitude of the transverse spherical aberration / Lu -0., 0083 mm.

Claims (1)

Invention Formula A high-aperture photographic telephoto lens consisting of four components, the first of which is made in the form of two-convex, positive and negative lenses, the second component contains a negative meniscus facing its concavity to the image, the third component is made of glued positive meniscus convex to the image and The fourth component is a two-convex lens, characterized in that, in order to improve image quality, reduce distortion and reduce ha The liquid is filled with a liquid medium 6 with a special course of dispersion, as well as a negative meniscus 7 of low optical power, turned by concavity to the image. The third component is made of glued positive meniscus 8, convex to the image a double-coiled lens 9. The fourth component contains a two-convex L1 / NZU 10, after the fourth component and rd thirty light filter 11 is located. 35 the image between which is 25 barites, the positive lens of the first the component is convexly flat, and negative is the meniscus facing the concavity of the image; the second component is entered sequentially in front of the negative meniscus the negative meniscus facing the concavity of the image and the positive meniscus facing the concavity of the image and the fourth component is designed as a single lens, and the liquid medium is characterized by the following parameters: p, 1.37 - 1, + 5; - 60; , 62 - 0.635, where Pr is the refractive index of the liquid medium; the dispersion coefficient of the liquid medium; coefficient of relative partial dispersion of a liquid medium. The telephoto lens runs off at once. the telephoto lens is focused on a cognitive shooting distance by moving the third component of the optical axis in the image direction. A telephoto lens has the following characteristics: focal length f 29 mm; relative aperture, 8; floor angle; 40 45 HD ((edactor A.Revin Compiled by V. Arkhipov Tehred A. Kravchuk Order 7223 / +2 Circulation 513 $ NIIPI State Committee for Inventions and Discoveries at C CST USSR 113035, Moscow, Zh-35, Raushsk nab., D. 45 HD Corrector Osciple Subscription