SU1742772A1 - Binoculars - Google Patents

Abstract

Use: binoculars for observing distant objects and high magnification telescopes. SUMMARY OF THE INVENTION: A lens of interconnected lenses (1 and 2) creates an image inverted by a prism inverting system, which is viewed with the aid of a four-component ocular. The ocular p contains three positive meniscus (4, 7 and 8) and glued component from the lenses

Description

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The invention relates to optical instrumentation, more precisely to devices for observing distant objects that work with the eye, in particular binoculars, and can be used in large-scale optic tubes.

Binoculars are known, each of the two optical systems of which contains a telephoto lens of two positive components, the first of which is glued together from positive and negative lenses, the second is made of negative and positive lenses, the aperture of the lens is located in the inter lens space, which surrounds the prism system located between components of the lens and the eyebrow r. In this binoculars, the lens design allows the field of view of the binoculars to be increased, but it leads to an increase in the longitudinal size (height) of the binoculars and weight (weight), which is undesirable in high magnification binoculars.

Known binoculars consisting of a two-component lens, the first component of which is made of positive and negative lenses glued together and the positive meniscus behind them, the second negative, are glued of negative and positive lenses with a distance between the components of 0 , 3-0.4 of the focal length of the lens wrapping the prism system and the three-lens optic eyepiece 2. This binocular has an increase of 20x, a field of view of 3.5i, a longitudinal size (height) of -167 mm. The optical characteristics and mass of this binocular are the same as in similar foreign binoculars made by foreign firms, but the longitudinal value (height) is significantly reduced. However, due to the complexity of the lens, the manufacturing technology of the entire binoculars is significantly complicated.

Closest to the invention is binoculars containing a lens made of a two-convex lens, and a negative meniscus prism wrapping system and an eyepiece from a first positive meniscus with a concavity to the object, a dual-possessed positive component and a second concavity to the image.

Binoculars have insufficient field of view.

The aim of the invention is to increase the field of view.

This goal is achieved by the fact that in binoculars containing a lens of a two-convex lens and a negative meniscus,

facing the concavity to the object, the prism wrapping system and the ocular from the first positive meniscus facing the concavity to the object, the dual-glued positive component and the second positive meniscus facing the concavity to the image, an additional positive meniscus facing the concave to the image , the dual-sided positive component is made of a two-convex lens and a negative meniscus, while in the first positive meniscus ok The magnitude of the radius of curvature of the concave surface is smaller than the radius of the convex surface in absolute value, the radii of curvature of the convex surfaces of the first positive and additional positive menisci are equal in magnitude, in the two-convex lens of the objective the radius of curvature of the first surface is greater than the radius of the second surface in absolute value, while Lens lenses are glued together.

The drawing shows an optical arrangement of a single branch of a binocular.

Binoculars contains a lens made of glued from a positive two-convex lens 1, in which the second radius is smaller than the first in absolute value, and a negative meniscus 2, a prismatic reversing system 3. Behind the prism system 3, the oculi: meniscus 4 facing the object in which the second radius is larger than the first in absolute value, the second component of the ocular is glued together from a two-convex lens 5 and a negative meniscus 6. The third component of the ocular is a positive change ck 7 placed convex to the object. The fourth component of the ocular is the positive meniscus 8, which is convex to the object. In this case, the convex radii of the lenses 4 and 8 are equal to each other.

The proposed binoculars have a longitudinal value of 176 mm and a field of view angle of 4 °, which significantly improves the usability of binoculars when observing distant objects. With a field of view of binoculars of 3.5 ° at a distance of 1000 m, the observer will observe a space of 61 m in size, and with a field of view of 4 ° a space of 70 m.

Claims (1)

Invention Formula Binoculars containing a lens with a two-convex lens and negatively about a meniscus with a concave, facing the target, a prism wrapping system and an eyepiece from a first positive meniscus facing with a concavity to the object, a double-glued positive component and a second positive meniscus facing with a concavity to the image, characterized in that, in order to increase the angle of view, in the ocular behind the second positive meniscus an additional positive meniscus facing the concavity of the image is installed, the dual-glued positive component is made of a two-convex lens and denied five in the first positive meniscus of the ocular, the radius of curvature of the concave surface is less than the radius of the convex surface in absolute value, the radii of curvature of the convex surfaces of the first positive and additional positive meniscus are equal in absolute value, and in the two-convex lens of the lens the radius of curvature of the first surface is greater the radius of curvature of the second surface in absolute value, with the objective lens glued together.