SU1390591A1 - Lens binoculars - Google Patents

Abstract

The invention relates to optical instrument making and allows improving image quality while reducing the longitudinal dimensions of the device. Each of the two pivotally connected optic tubes contains an objective 1, a wrapping system 2, and an eyepiece 3. Each of the objective components 4 and 5 is glued together from a two-convex 6 (8) and double-concave 7 (9) lenses. Difference dispersion of materials in the first component is not less than 10, and the difference between the refractive indices of materials is greater than in the second component. The second Kepler telescopic system, formed by lenses 15, 16 and the ocular rom 3, is made with an increase of at least 1.2. The location of the convex lens 15 of the wrapping system 2 convexity to the subject makes it possible to correct the distortion of the optical system. 1 il. (L

Description

co

11390591

The invention relates to optical instrumentation, namely to telescopic optical systems for observing distant objects.

The purpose of the invention is to improve the image quality while reducing the longitudinal dimensions.

this system, which leads to a decrease in length. The total length of the proposed binoculars is 162.89 mm.

By selecting the radii of curvature of the surfaces of the gluing in the components 4 and 5 of the objective 1, a double correction of spherical aberration is achieved.

Example. Performing the lens

The drawing shows the principal JQ binoculars having the following characteristics: a visible increase of about

optic scheme of each optic tube of the lens binoculars.

The optical scheme consists of lens 1, a wrapping system 2, and an eyepiece 3. Lens 1 is made of two glued positive components A and 5. Component 4 is glued together from a two-convex lens 6 and a double-curved lens 7, component 5 is from lenses 8 and 9.20

The wrapping system 2 consists of three parts. The first part contains two flat convex lenses 10 and 11 and forms the first Kepler telescopic system with lens 1. The second 25 part contains two identical symmetrically located meniscus 12 and 13 with the aperture diaphragm 14 between them. The third part consists of a two-angle field; exit pupil diameter mm; removal output

pupil, 94 mm; optical length

15 systems L 162.89 mm.

Spherical aberration in the angular measure for the main wavelength (line D) does not exceed 2 angular minutes, and in the spectral range from the F line to the line C no more than 6 angular minutes. The chromatism of the position is no more than .6.5, and the chromatism of the increase is no more than 9 arc-minutes. Astigmatism no more than 4.26 diopters.

Claims (1)

Invention Formula Lens binoculars containing two pivotally connected telescopes, each of which is made of a lens, a wrapping system and an ocular, and the lens contains two positive components, the first of which is glued together, each of the wrapping systems is made of three lens parts, the first and a third of which are formed by Kepler's telescopic systems, respectively, with the lens and the eye; the first part of the tilting system contains two flat-convex lenses that are convex facing one another, the second part is made and of two identical symmetrically arranged menisci facing inwardly towards each other with an aperture diaphragm mehda, the third part contains two flat-convex lenses, and the ocular contains two identical flat-convex lenses, convex facing each other, different in that - neither the quality of the image with a decrease in the longitudinal dimensions, each of the components of the lens is made of glued together with a two-fold and two-concave lenses, while the difference between the refractive indices of materials in the first component e is greater than the second difference coefficients dispersion Manakova shyuskovypuklyh lenses 15 and 16, the convexity facing the subject. The ocul p 3 is made of two flat-convex lenses 17 and 18, convex facing one another. The third part of the wrapping system of lenses 15 and 16 and the ocular p 3 form the second Kepler telescopic system with an increase of at least 1.2. The arrangement of the flat-convex lens 15 of the wrapping system 2 by convexity to the object makes it possible to correct the distortion of the optical system, i.e. Improve image quality. The implementation of the oculars of the first and second Kepler telescopic systems of the same 11, 12, 17, and 18 allows to unify the design and facilitate the process of manufacturing the lens binoculars. With the introduction of magnification into the second telescopic system, the air gap between the objectives and the eye of this system changes slightly. But in this case, the magnification of the first Kepler telescopic system is reduced, and consequently, the focal distance of the lens is reduced and the air gap between the lens and the eye is significantly reduced. binoculars having the following characteristics: a visible increase of about angular field; exit pupil diameter mm; output removal pupil, 94 mm; optical length system L 162.89 mm. Spherical aberration in the angular measure for the main wavelength (line D) does not exceed 2 angular minutes, and in the spectral range from the F line to the line C no more than 6 angular minutes. The chromatism of the position is no more than .6.5, and the chromatism of the increase is no more than 9 arc-minutes. Astigmatism no more than 4.26 diopters. Invention Formula Lens binoculars containing two pivotally connected telescopes, each of which is made of a lens, a wrapping system and an ocular, and the lens contains two positive components, the first of which is glued together, each of the wrapping systems is made of three lens parts, the first and a third of which are formed by Kepler's telescopic systems, respectively, with the lens and the eye; the first part of the tilting system contains two flat-convex lenses that are convex facing one another, the second part is made and of two identical symmetrically arranged menisci facing inwardly towards each other with an aperture diaphragm mehda, the third part contains two flat-convex lenses, and the ocular contains two identical flat-convex lenses, convex facing each other, different in that - neither the quality of the image with a decrease in the longitudinal dimensions, each of the components of the lens is made of glued together with a two-fold and two-concave lenses, while the difference between the refractive indices of materials in the first component e is greater than the second difference coefficients dispersion ma31390591 The materials in the first component are not less irrigated with an increase of at least 1.2, 10, the coefficient of dispersion of the material of the flat-convex lenses of the third part the second component is the same; the second reversing system faces Kepler’s product telescopic system.