SU851319A1 - Binocular magnifier - Google Patents

Description

54). BINOCULAR BOTTOM

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The invention relates to optical systems and is intended to view enlarged images of objects simultaneously with two eyes.

A known binocular loupe contains two optical systems for viewing images with two eyes, each of which contains two components, the first of which is a positive two-glued lens, and the second is two two-glued positive lenses and a positive lens 1 is located between them.

Despite the simplicity of the design, this system has significant drawbacks - a low angle of the field of view and a small aperture ratio.

A binocular loupe is known, containing two positive components, the first of which is made in the form of a positive lens, the surface of which is paraboloid convex, and the second one is made in the form of a positive meniscus and a two-glued positive lens (2.

Our paraboloid surface in the construction causes technological difficulties in its manufacture, a research institute, which increases its production cost.

The purpose of the invention is to increase the aperture of a binocular loupe, as well as improving the quality of the correction of its aberration.

This goal is achieved by the fact that in a binocular loupe containing two positive components with a single positive lens in the composition of each of them and placed between

10 they have a prism, two positive and negative single lenses are introduced into the second component, and the optical power of the first lens with an accuracy of .0.1 is equal to the optical power of a single

15 positive lenses of the second component and more than two times less than the optical power of the entire magnifying glass, and the optical power of the second lens more than three times less than the optical power of the first lens.

The drawing shows the principle of a binocular optical design.

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A binocular loupe contains sequentially arranged a first positive component, made in the form of a single lens 1 bounded by spherical surfaces, a rectangular prism 2 that changes the direction of the optical axis of the sietem, and a second component made in the form of a set of four lenses 3-6, of which the first two 3 and 4 and fourth b are positive, and the third 5 -. negative, with the optical power of the first line 3 with an accuracy of 0, 1 being equal to the optical lens of the fourth lens 6 and more than two times less than the optical power of the magnifying glass, and the optical power of the second lens 4 more than three times less than the optical power of the first lens 3.

In operation, the object in question is positioned in front of the first component 1 of the binocular loupe.

A binocular loupe has a relative aperture of 1: 0.6, a focal distance of 45 mm, and can be used to view enlarged objects simultaneously with two eyes that are 30 mm away from the last surface of the magnifying glass.

Claims (2)

Invention Formula A binocular loupe containing two positive components with a single positive lens comprising X and a prism placed between them, is characterized in that, in order to increase the relative aperture and image quality, two positive and negative single lenses are introduced into the second component, and the power of the first lens with an accuracy of 0.1 is equal to the optical power of a single positive lens of the second component and more than half the optical power of the entire magnifying glass, and the optical power of the second lens is more, it is three times less than the optical power of the first lens. Sources of information taken into account in the examination 20 1. Slyusarev G. G. Calculation of optical systems. L., Mechanical Engineering, 1975, p. 398. 2. USSR author's certificate 654925, cl. 6 02 25/00, 1977 (prototype). yo