RU136598U1 - WIDE BINOCLE - Google Patents

Abstract

1. Wide-angle binoculars consisting of a lens, a prism wraparound system and a wide-angle eyepiece containing four components, the first of which is a glued lens consisting of two menisci facing concavity to the subject, the second positive component is a glued lens consisting of a biconvex lens and a negative meniscus, the fourth is made in the form of a positive meniscus convex to the object, characterized in that the first component of the eyepiece is positive, while the absolute value of the first iusa cemented positive meniscus greater than the absolute value of the third of its radius, and a third component - a biconvex linza.2. The wide-angle binoculars according to claim 1, characterized in that the prism wrapping system is mounted to rotate about an axis perpendicular to the optical axis of the binoculars, a rhombus prism is installed in front of the eyepiece, and the lens is a two-component, in which the first component is positive, the second component is negative, the following conditions are met: 1.3Φ≤F≤2Φ0.8Φ≤ | Φ | ≤1.85Φ0.76≤K≤0.89, where Φ is the optical power of the lens, Φ is the optical power of the first positive component of the lens, Ф- optical power of the second negative component Lens-coagulant, K - coefficient relationship lens length from its first surface to the focal plane to the largest focal rasstoyaniya.3. The wide-angle binoculars according to claim 1, characterized in that a grid is placed in front of the eyepiece. The wide-angle binoculars according to claim 2, characterized in that the first positive lens component comprises a two-lens gluing consisting of a biconvex lens and a negative meniscus

Description

The utility model relates to optical instrumentation and can be used to create binoculars and high-magnification telescopes with an increased field of view, including optical stabilization systems by turning prism wraparound systems.

Known binoculars SU 1742772, comprising a lens — a two-lens gluing of a biconvex lens and a negative meniscus facing concavity to an object, a prism wrapping system and a four-component five-lens eyepiece, in which the first component is a positive meniscus, with its concavity facing the object, the second positive component, consisting of a biconvex lens and a negative meniscus, the third and fourth components are made in the form of positive menisci facing concavity to the image.

The disadvantage of the analogue is the impossibility of providing in it a combination of optical characteristics: an ocular field of view of more than 70 ° and necessary to accommodate the mesh of the anterior focal segment of the eyepiece with full diopter movement. The eyepiece does not have an aberration correction independent of the lens.

The closest solution to the eyepiece claimed in wide-angle binoculars is the wide-angle eyepiece system (RF application 96101846/28 dated 01/31/1996) containing a four-component seven-lens eyepiece, in which the first component is a glued negative lens, consisting of two menisci facing concavity to the subject , the second component is a glued lens, consisting of negative and positive lenses, the third component is a positive glued lens, consisting of positive and negative lenses, the fourth component is a meniscus, concavity to the image.

This four-component seven-lens eyepiece with an aspherical surface in the positive lens of the third component has a high level of correction of monochromatic and chromatic aberrations with an increased distance of removal of the entrance and exit pupils, but provides an ocular field of view of only 60 °.

The objective of the utility model is to create wide-angle large-magnification binoculars with an angular field of view of the eyepiece of more than 70 °, with the possibility of image stabilization and with the possibility of placing a grid in front of the eyepiece.

To achieve this goal, a wide-angle binocular is proposed, consisting of a lens, a prism wraparound system and a wide-angle eyepiece containing four components, the first of which is a glued lens, consisting of two menisci facing concavity to the object, the second positive component is a glued lens, consisting of a biconvex lens and negative meniscus, the fourth is made in the form of a positive meniscus convex to the object, characterized in that the first component of the eyepiece is positive, with the absolute value of the first radius of the glued positive meniscus is greater than the absolute value of its third radius, and the third component is a biconvex lens. To ensure image stabilization, the prism wrapping system is mounted to rotate about an axis perpendicular to the optical axis of the binoculars.

To adjust the intercenter distance of the eyepieces between the prism wrapping system and the eyepiece, a rhombus-prism is introduced. In front of the eyepiece, a goniometric grid can be installed.

In FIG. 1 is an optical diagram of one branch of wide-angle binoculars. The binoculars contains a lens 1, including the first 2 and second 3 components, a prism wrapping system 4, for example, a Pehan prism, a rhombus-prism 5 and a wide-angle seven-lens four-component eyepiece 6, in which the first component is a positive bonded lens 7, consisting of two menisci 8 and 9 , facing concavity to the subject, while the absolute value of the first radius of the glued positive meniscus is greater than the absolute value of its third radius, the second component is the glued lens 10, consisting of a biconvex lens 11 and the negator body meniscus 12, the third component is a biconvex lens 13, and the fourth component is made in the form of a positive meniscus 14, convex to the object,

In FIG. Figures 2 and 3 show the versions of the two-component lenses, in which the first component is positive, the second component is negative, and the following conditions are met:

1,3F _Σ ≤F ₁ ≤2F _Σ

0.76≤K≤0.89

where Φ _Σ is the optical power of the lens,

Φ ₁ - the optical power of the first positive component of the lens,

F ₂ - the optical power of the second negative component of the lens,

K is the coefficient of the ratio of the length of the lens from its first surface to the focal plane to the magnitude of the focal length.

In the embodiment of FIG. 2, the first positive component of the lens is a two-lens gluing 15, consisting of a biconvex lens 16 and a negative meniscus 17, with its concavity facing the object, and the second component is the negative meniscus 18, with the concavity facing the object.

In the embodiment of FIG. 3, the first positive component of the lens contains a two-lens bonding 19, consisting of a biconvex lens 20 and a biconcave lens 21 and a positive meniscus 22 located behind it, convex towards the object, and the second negative component, the negative meniscus 23, concavity facing the object.

Using the proposed technical solutions developed:

- wide-angle binoculars with the following technical specifications:

Increase 20 times

The field of view is 4.15 ° (the ocular field of view is greater than 70 °),

Exit pupil diameter 2.5 mm Exit pupil removal 10 mm Optical system length 186 mm;

- wide-angle binoculars with the following technical specifications:

Increase 25 times

Field of view 3.3 ° (ocular field of view greater than 70 °),

Exit pupil diameter 2.2 mm Exit pupil removal 10 mm Optical system length 204 mm.

In any of the proposed wide-angle binoculars, it is possible to place a grid in front of the eyepiece, since the distance from any point on the first surface of the eyepiece to its anterior focal plane is greater than the magnitude of the eyepiece movement by 10 diopters.

Claims (5)

1. Wide-angle binoculars consisting of a lens, a prism wraparound system and a wide-angle eyepiece containing four components, the first of which is a glued lens consisting of two menisci facing concavity to the subject, the second positive component is a glued lens consisting of a biconvex lens and a negative meniscus, the fourth is made in the form of a positive meniscus convex to the object, characterized in that the first component of the eyepiece is positive, while the absolute value of the first iusa cemented positive meniscus greater than the absolute value of the third of its radius, and a third component - a biconvex lens. 2. The wide-angle binoculars according to claim 1, characterized in that the prism wrapping system is mounted to rotate about an axis perpendicular to the optical axis of the binoculars, a rhombus-prism is installed in front of the eyepiece, and the lens is two-component, in which the first component is positive, the second component negative, while the following conditions are met: 1,3Φ _Σ ≤F ₁ ≤2Φ _Σ 0.8Φ _Σ ≤ | Φ ₂ | ≤1.85Φ _Σ 0.76≤K≤0.89, where Φ _Σ is the optical power of the lens, Φ ₁ - the optical power of the first positive component of the lens, F ₂ - the optical power of the second negative component of the lens, K is the coefficient of the ratio of the length of the lens from its first surface to the focal plane to the magnitude of the focal length. 3. The wide-angle binoculars according to claim 1, characterized in that a grid is placed in front of the eyepiece. 4. The wide-angle binoculars according to claim 2, characterized in that the first positive component of the lens contains a two-lens gluing, consisting of a biconvex lens and a negative meniscus, with its concavity facing the object, and the second component, the negative meniscus, with the concavity facing the object. 5. The wide-angle binoculars according to claim 2, characterized in that the first positive component of the lens contains a two-lens gluing, consisting of a biconvex lens and a biconcave lens, and a positive meniscus located behind it, convex towards the object, and the second negative component is a negative meniscus, concavity facing the subject.

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