SU620926A1 - Wide-angle wide-aperture objective lens - Google Patents

Description

(54) LIGHT-WIDTH LIGHT-WATER LENS

This invention relates to optical systems, in particular high-aperture wide-angle lenses. Wide-angle Gauss-type lenses are known, characterized by large light intensity and forming an image on a spherical surface jlj I2. A known Gaussian-type ten-lens lens with a positive curvature of the field of view l. The aperture of the lens is placed between two diffusing glued meniscuses. On the side of the large posterior segment, a positive lens is located behind one of the meniscuses, behind the lump, on the side of the smaller posterior segment, three simple positive lines are installed, as well as two Smith lenses. The portable lens aperture is not less than 1: 1.2, the field of view angle for the visible range is at least 45 °. However, this lens contains eight components, which requires a relatively high cost in its production. Also known is a three-component high-aperture wide-angle lens containing a glued positive component, a single positive lens, and a negative component | h. The disadvantage of this lens is the lack of aperture ratio of the flat image field. The purpose of the acquisition is to increase the luminosity and image formation on a convex spherical surface. . This is achieved by the fact that in the first glued positive component, made with a focus of 1.3-1.7, the negative lens has the shape of a meniscus, the second positive component is made in the form of 1 two-convex lens with a focus of 0.8-1.2, the negative component is glued of a double-concave lens with a focus, 3-O, 5, and the radius of curvature of the last refractive surface, combined with the image surface, has a size of 1.3-, 7f, the distance between the positive components is

0,, 6 f, the distance between the positive and negative components 0,, 35 f, where J is the distance of the lens.

The drawing shows the principal structural scheme of the proposed lens.

There are three components to the objectives.

The first positive component is glued to a two-conic lens 1 and a negative meniscus 2, the second component is a two-convex lens 3, and the third is a double-concave lens 4.

It should be noted that a double-bent lens can be made in the form of two lenses with the same preparring index .5

Such an embodiment of the lens allows one to increase the aperture and form a high-quality image of a spherical surface. .;., .20

Formulas (and inventions

High-aperture wide-angle lens, containing | sex effective adhesive, $ component, single positive liv-. . and the negative component, about t i i-:

due to the fact that, in order to increase the luminosity and form an image on a spherical surface, in the first glued positive component, with a focus of l, 3-l, 7f, the negative lens is in the form of a meniscus, 0.8-1.2, the negative component is made in the form of glued together from a bently bent lens with a focus of O, 3-0,5 | and the radius of curvature of the last refractive surface aligned with the surface of the image is 1.3-3.7 f, the distance between the positive components is 0.4-0.6, the distance between the positive and negative components 0, 05-0.351 where iE is the focal length of the lens.

Sources of information taken into account in the examination:

1.Patate of Germany No. 1299 29, cl. 42 1l4 / O8, 1968.

2.Photographic and projection lenses developed in GOI, 1969. tab. 4, the ERIDAN lens.

3. Freygshy patent number 111634O, M.Kl.CH 02 V 11/34, 1968.

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