SU1651262A1 - Projection pancratic objective lens - Google Patents

Abstract

FIELD: optical instrumentation; Used in projectors, telescopes and other optical devices. The purpose of the invention is to improve image quality, increase the zoom range and simplify the design. The first component of lenses 1 and 2 and the second component of lenses 3 and 4 are configured to move along the optical axis to adjust the focal length. The third component of the lenses 5-7 and the fourth in the form of meniscus 8 are fixed. The zoom range is 3, 6 linear field of view 8 mm, the aperture angle in the image space is 14 °. 4 il.

Description

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Image surface

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ABOUT

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The invention relates to the field of optical instrumentation, in particular to projection lenses, and can be used in projectors, telescopes, image transfer systems and other optical and electro-optical devices.

The aim of the invention is to improve the image quality, increase the zoom range and simplify the design.

Figure 1 shows the principal optical layout of the lens; Figures 2-4 are graphs of frequency-contrast characteristics for different values of focal distance (f) and image field points (y).

The optical scheme of the projection punk lens consists of four l

they have a simple design: from one to three lenses. The lens is designed for a spectral range of 0.5–0.6 µm.

The beam of rays from the object falls on the lens

1 and is subsequently refracted by lenses 1-8, builds an image on the surface of the image, with the first, second and third components having a positive optical power forming a converging beam

rays. The fourth component, made in the form of a negative meniscus 8 and placed near the surface of the image, serves to correct astigmatism, and therefore, to improve image quality

for the whole field of vision. When moving the first and second components along the optical axis in different directions according to the linear and nonlinear laws, respectively, of 10 20 30 n (m / pm)

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30 And (ling / mp)

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Claims (1)

Claim A projection panoramic lens containing three components, the first of which is a positive glued lens, the second is a glued lens mounted to move along the optical axis, the third positive component contains a positive glued lens and a positive meniscus facing concavity to the image, characterized in that, with In order to improve image quality, increase the zoom range and simplify the design, after the third component, a negative meniscus is installed, facing convex Strongly to the image, wherein the first component is glued from a biconcave and biconvex lens and mounted movably along the optical axis, and the third lens component is made from glued negative meniscus lens and a biconvex. Editor L. Gratillo Compiled by V. Arkhipov Tehred M. Morgenthal Corrector S. Shevkun Order 1606 Circulation 330 Subscribed VNIIIP14 of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR; 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.