SU1525652A1 - Wide-angle objective - Google Patents

Abstract

This invention relates to an optical instrument. The aim of the invention is to increase the angular field of the lens while maintaining high image quality. The wide-angle lens contains six components, of which the first, fifth, and sixth are made in the form of single negative meniscuses, facing with a concavity toward the aperture diaphragm located between the third and fourth components. The second component is made in the form of a positive meniscus with a concavity facing the image, the third component consists of dual-glued and triple-glued positive lenses, and the fourth contains a four-glued positive lens and a plane-parallel plate with an equivalent colored glass fracture index. 1 il.

Description

(L

315

The invention relates to optical triborebuilding, in particular, to j photographic lenses, and can be used in various installations HOBJKax requiring the use of wide angle lenses with high image quality.

The invention slit is to increase the angle of the lens while maintaining high image quality.

The drawing shows the scheme of the proposed lens.

The lens consists of six components 1-6. Component 1 is made in the image;: e of a negative meniscus with a concavity facing the aperture diaphragm 7. Component 2 is made in the form of a positive meniscus with a concavity facing the aperture diaphragm. Kokponent 3 is made of a dual-sided / vital meniscus containing

8 and two-convex biconvex, and a three-glued positive charger containing negative

whether two

nisk 10, biv co-convex lens 11 and double-concave lens 12. The component is made of a plane-parallel plate 13 and a four-glued positive lens containing a flat-bent lens 14, a double convex lens 15 two-bent lens 16 and a two convex lens 17. Components 5 and 6 are negative meniski 5 and 6, facing the concavity to the aperture diaphragm me 7.

 The lens works as follows.

Optical design and construction from deI components allowed the floor

A lens with a focal length of f 150 mm, a relative aperture I:, 5, and an angular field of 110 °.

The proposed lens has a high image quality, providing in the manufactured samples at least 60-50 mm within the entire floor.

Claims (1)

Invention Formula A wide-angle lens containing six components, of which the first, fifth and sixth are made in the form of single negative meniscuses, facing with a concavity towards the aper 0 five 0 The third diaphragm is located between the third and fourth components, the third component includes a positive lens glued from a negative meniscus, two-convex and two-curved lenses, the fourth component is glued together with positive, two-concave and two-convex lenses, and the second component is a concave-facing meniscus to the aperture diaphragm, characterized in that, in order to increase the angular field, the second component is made in the form of a positive meniscus, in the third component in front of the glued positive lens you enter positive meniscus fused from biconcave and biconvex lens, a fourth positive lens component made biconvex, to the front surface of which is adhered a plano lens, and before the component is installed parallel plate colored with the equivalent refractive index of glass.