SU1615659A1 - Telephoto lens with remote entrance pupil - Google Patents

Abstract

The invention relates to optical instrument making and can be used as a collimator lens for checking the resolution of high-aperture lenses over the entire image field. The aim of the invention is to improve the image quality. The lens consists of four consecutively placed components, the first of which is glued together from double-curved and double convex lenses 1 and 2, respectively, the second is a single double double convex lens 3, the third component is glued together from two double convex lens 4 and convex to the object, The fourth component is glued together from biconcave and biconvex lenses 6 and 7. 1 Il.

Description

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31615659

The invention relates to long-focal lenses with a remote entrance pupil and can be used as a collimator with an object in an apparatus for checking the resolution of high-aperture oje-beKTHBOB across the entire image field with I. The purpose of the invention is to improve image quality and increase Q the removal of the entrance pupil of the lens to the values of s. 0.6 0.7 f,

The drawing shows the prI; the optical optical scheme of a long-focus lens with a disposed entrance pupil.

The long-focus lens consists of four components, of which the cervix is made of successively positioned glued negative double-curved lens 1 and a positive two-conical lens 2j the second hey component - a single positive double-convex lens 3, the third

the emponent is made of a sequence

to

HJD located glued together by a double-convex lens 4 and negative meniscus 55, turned into a concavity to the object, the fourth component consists of subsequently arranged glued two-bent 6 and positive lenses,

The lens has the following characteristics;

focal length f 500 mm;

hole 1

P

relative 1; five;

angular field in the space of pmet 2W 23;

removal of the entrance pupil sy -330 mm;

spherical lens aberra not more than 0.4 mm;

position chromatism is less than ~ 1 mm;

0.1

astigmatism - 0.05 mmo

mm coma

Claims (1)

The formula of the invention A long-focus lens, with a remote pupil of the body, containing four components, of which the first component is glued together from a two-bent and positive lens, the second component. A single positive j lens is the third and fourth components glued, characterized in that, in order to improve the image quality and increase the removal of the entrance pupil to a value of s 0.6-0.7 fj, the positive lens of the first component of the double cone is The third component is glued together from a two-convex lens and a negative meniscus, and the fourth component consists of a double-bent and positive lens, where f is the focal length of the lens