SU1425575A1 - Biocular magnifying glass - Google Patents

Abstract

The invention relates to optical instrumentation, namely, high-aperture loupes, designed to view enlarged images of objects with two eyes at the same time. The purpose of the invention is to improve the light distribution by eliminating vignetting over the field of view while improving the image quality. The goal is achieved by the fact that the first component is made of glued from a negative meniscus 2, convex to the object, a two-convex lens 3, the second component is made negative, a two-bent concave 5 and a two-convex 6 lenses, and the fourth component is executed in the form negative meniscus 8, the concentric exit pupil of the system and is located at a distance of 0.09-0.11 g from the third component, where f is the focal distance of the biolux. 1 il. S

Description

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The invention relates to an optical instrument, namely, light loops, designed to view enlarged images of objects to two eyes simultaneously.

The purpose of the invention is to improve the quality of the image and to improve the light distributed through the noJtro image by the method of eliminating the vignetting of nak-jntoHHbix beams of rays. I The drawing shows the principle of an optical biokull | umbi.

 The magnifying glass consists of four comp. The first cue I is glued from a negative meniscus 2 and a positive two-convex lens 3, The second component A is glued from a negative-: a plastic lens 5 and a positive lens: 6. The third component is a pink menus. The fourth component is a negative meniscus 8 facing convexity to the object and made concentric with the exit pupil of the system- 1m.

The magnifying glass has a high image quality: for the axial point of the object, the diffusion circle is; 0.13 mm, for the edge points, 0.5 mm, the chromatism of the position is 0.015 mm, the chromaticity of magnification is 0.228 mm (in the reverse direction of the rays)

; In the proposed biolupe, there is a complete absence of viietting on the edge of the floor, which gives a high uniformity: the light distribution and makes it possible to observe the whole betrays with two eyes at the same time.

The elimination of vignetting and image enhancement is achieved in a consistent manner; meniscus 8 corrects spherical aberration without introducing astigmatism, since surfaces 9 and 10 are filled with concentric exit pupils

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system. The meniscus 8 is removed from the lens 7 by 0.09-0.1 If, where f is the focal length of the magnifying glass, which allows for the correction of a coma of wide oblique beams, which especially increases when the exit pupil is removed. The magnitude of the air gap was obtained as a result of the optimization of the computer system. Surfaces 11 and 12 are made aplanatic, which makes it possible to increase the relative aperture of the system in front by n times, where n is the refractive index of the medium behind the aplanatic surface. The radii of glued surfaces are parameters for correcting chromatic aberrations.

The proposed biolup has the following characteristics: focal length f 64 mm, magnification 3.6, exit pupil diameter 78 mm, exit pupil removal 60 mm, anterior focal length 35 mm, linear sight field 18.5 mm.

Claims (1)

Invention Formula A biocular loupe containing four components, the first and third of which are positive, the fourth is a negative meniscus, differs from the fact that, in order to improve the image quality and improve the light distribution over the image field, the first component is glued together from the meniscus and biconvex lens, the second component is negative and glued together from biconcave and biconvex lenses, the third component is made in the form of a flat-bent lens, and the negative meniscus is convex to the object and set to standing 0.09-0.11 focal distance of the magnifier biokul molecular weight of the third component.