SU1322214A1 - Telephoto lens - Google Patents

Abstract

The invention relates to optical and instrumentation engineering and allows improving image quality. In component 1, a two-convex lens (L) 3 and a positive L glued from a negative meniscus 4 and a two-convex L5 are installed, a negative L. It is glued from a double-bent L6 and a positive meniscus 7. L6 is removed from L5 by 0.033 of the focal length of the lens. The negative A component 2 is glued together from the negative menisci 8 and 9, facing the concavity to the object. The air gap between components 1 and 2 is 0.183 of the focal length of the lens. A telephoto lens provides a high quality image for a point on and off the axis. The chromatism of the increase does not exceed 0.02 mm, the distortion is 0.16% at the edge of the corner floor. The meridional curvature is positive, equal to 0.58 mm. 1 il. (L F -X8 3

Description

 13222142

The invention relates to an optical-positive value for the area of the instrument-making pupil, in particular, to a value of 0.5, and a negative objective lens intended for opening to the pupil, meridional

observant devices. the curvature is positive and equal to 0.58mm.

The aim of the invention is to increase the distortion does not exceed 0.16% and the chronology of the image quality. The magnification magnification is 0.02 mm at the edge.

The drawing shows a principal-angular floor. on the optical scheme of a telephoto lens.

Telephoto lens contains a positive Telephoto lens can be used

component 1 and negative com-synthesis of a small-sized telescopic component 2. Component 1 consists of a dna system with good quality

positive lens 3, positive image, lens glued from negative

Claims (1)

meniscus 4 and two convex lenses 5.15. The formula of the invention and a negative lens glued from a double-concave lens 6 and a positive-telephoto lens containing two lumpy meniscus 7. The air gap component, the first of which is between the lenses 5 and 6 is equal to 0.033 focus, contains a two-convex 2. A lens (a lens and a duplex lens, the second component 2 is a negative-lens duplex lens, a negative lens glued from the negative one, in that significant meniscuses 8 and 9, which are bent towards In the first component, the two-joint distance between components 1 and 225 of the lens is positive, of which 0.183 times the focal length of the negative meniscus and the objective lens is positive, and the lens’s second telephoto lens has There is a focal distance at a distance of 0.033 focal distance of 219 mm, an angular field of 1 36 16i of the lens is set to negative-relative aperture of 1: 5.3, the length of the lens glued from the co-folding system is 122.1 mm, and The body of the lens and the positive meniscus shortened is 1.79. The negative component of the second component in the specified combination was made, and their sophisticated lens was made of two rational placement along the optically negative meniscules of the reverse axis, which allowed us to obtain an image. concavity to the object, with a high quality appearance both for a point, a small gap between the first and second axes, and for a point outside the axis. The elevation of the components is 0.183 example, the spherical aberration has the focal length of the lens.