SU1307426A1 - Catadioptric zoom lens - Google Patents

Abstract

This invention relates to an optical instrument. The purpose of the invention is to increase the luminosity and reduce the size of the movable lens components. To do this, after the third component in the form of a convex mirror. 4, a fourth component is disposed, consisting of a glued double-lens lens 5 and a negative meniscus 6, as well as a positive meniscus 7. Mirrors 3 and 4 are formed of a parallel beam of rays passing through the two-convex lens 1 and the negative meniscus 2 of the first component, which is bundle. Moving the third and fourth components along the optical axis in different directions according to linear and nonlinear laws, smooth increase in magnification is carried out. 3 il. with s

Description

one

The invention relates to an optical instrument making, namely to a mirror-lens pancrasical object, and can be used in cinema and photographic equipment, television

chambers in pankraticheskie telescopes.

The purpose of the invention is to increase the luminosity and reduce the size of moving components,

FIG. Shows the principal optical scheme of a mirror-lens pancreatic lens; Fig. 2 shows plots of the frequency-contrast characteristics of a lens at a focal length of 203 mm and various angles d of inclination of the incident beam; fig. 3 - the same, with a focal length of 400 mm

The lens consists of the first lens component, including the positive two lens 1 and the negative meniscus 2, the second component, performed as the primary one. a concave mirror 3 with a central hole, a third component in the form of a secondary convex mirror 4 and a fourth component, including a positive lens, glued together from a two-convex lens 5 and a negative meniscus 6, and a positive meniscus 7. The third and fourth components are movable along the optical axis in different directions according to linear and nonlinear laws, respectively.

A parallel beam of rays from the lens falls on the first lens component, consisting of lenses 1 and 2. The beam passing through the first component falls on the primary 3 and secondary 4 mirrors, which form the converging

the beam and direct it to the fourth component, consisting of lenses 5, 6 and 7. The beam of rays that passed through the system forms an image of the object in the focal plane of the objective. As the third 4 and fourth 5 and 6 components move along the optical axis, a smooth change in magnification occurs.

According to this concept, a lens with a focal length interval of 200-400 mm, a relative aperture of 1: 1-1: 2, and a field of view of 6-3 was calculated.

Claims (1)

Invention Formula A mirror-lens pancreatic lens containing three components, the first of which is a lens, the second is a concave mirror with a central hole, and the third is a convex mirror, characterized in that, in order to improve the aperture and reduce the dimensions of the movable components, the fourth component is installed , made of two positive lenses, the first of which is glued together from a two-convex lens and a negative meniscus, the second is a positive meniscus facing the concavity of the image, the first component is made and From the single double-convex lens and the negative meniscus facing the concavity to the object, the third and quarter components are arranged to move along the optical axis in different directions according to linear and non-linear laws, respectively. d 2 ° 07 3 °  ff fjfW / MM) 20 30 Editor T. Mitejko Compiled by V. Arkhipov Tehred I.PopovichKorrektor A.Obruchar Order 1632/47 Circulation 522Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d.4 / 5 Production and printing company, Uzhgorod, Projecto st., 4 fig.Z