SU974322A1 - Telescope - Google Patents

Description

(5) VISUAL PIPE

one

This invention relates to an optical instrument, namely, an optic tube of a geodetic instrument.

A theodolite T05 telescope is known, containing the front and rear lens groups represented by the objective and the ocular, respectively. The lens consists of a fixed positive lens made of two duplex lenses, each of which is composed of lenses with optical powers of different signs, and a movable ling group in the form of a single negative meniscus serving for focusing. The ocular is symmetrical, composed of two two-glued lenses, each of which is composed of lenses with optical powers of different signs t1).

The disadvantage of the system is the low quality of the inverted image.

The telescope is also known, retaining the anterior and posterior lens groups. The anterior group consists of a lens and a prism inverting system, the back is represented by an ocular lens. The lens is made in the form of double-convex and meniscus-shaped, facing concavity to the object, single lenses and two-glued lenses with optical powers of different signs; The ocular p is a three-component: the first and the third components are double-glued lenses made up of lenses with optical powers of different signs, and the second is a two-fold single lens 5 for 2.

A disadvantage of the known system is the low image quality, structural complexity, and large dimensions.

20

Claims (2)

The purpose of the invention is to improve the quality of the direct image during focusing, to infinity and finite distance. 3 The goal is achieved by the fact that in the optic tube containing the front and rear lens groups, the front lens group is made of two symmetrically arranged on both sides of the primary plane of the image of the components, the first of which is a stationary positive, consisting of a single two-convex lens, a negative meniscus and a two-glued confocal positive lens, the second component is mounted for movement along the optical axis, and the posterior lens group consists of a two-convex lens, tritsatelnogo meniscus facing convexity to the secondary image plane, dvuhskleennoy lens consisting of lenses with different optical powers signs and SVOCs Coconvex single lens facing a convex side of the secondary image plane. Performing an anterior lens group of two proportional components with dual-glued confocal positive lenses makes it possible to correct odd aberrations, achieve a double correction of spherical aberration, reduce the secondary spectrum and the spherochromatism of the tube by increasing the relative aperture of the objective of the anterior lens group to 1: 2. The implementation of a posterior lens group of a double-convex single lens and a concavity-facing meniscus to the object, a double-glued lens made up of lines with optical powers of different signs, and a flat-convex lens allows to correct the astigmatism of the telescope as a whole. The drawing shows the principal optical design of the telescope. The telescope contains laterally located front L-j and rear Ln lens groups. The front lens group L is made in the form of two proportional halves Lj and L, symmetrically located relative to the primary image plane N, the fixed stationary positive component, consisting of consecutively located single convex lens 1, negative meniscus 2, and lenses 3 and k form a confocal lens 5Component la, - positive, installed with the possibility of movement along the optical axis and made of lenses 6 and 7, forming a confocal lens 8, a negative meniscus 9, convex to the plane of the primary image N, and the two-convex lens 10. The component Lj is the lens of the front Kepler telescopic system, component -4 by the ocular. The rear lens group L contains two components: an objective lens Lj and an eyepiece p Lg of the rear Kepler telescopic system. Component 15: made in the form of a binary 11 and a meniscus 12 single lenses, the component L contains a two-glued lens made up of negative 13 and positive 1 lenses, and a plane-convex single lens 15 with the convex side facing the secondary image NI. Claims of the invention A telescope containing front and rear lens groups, characterized in that, in order to improve the quality of the direct image when focusing on infinity and the final distance, the front lens group is made of two symmetrically arranged on both sides of the primary plane of the image components, the first of which is a positive fixed, consisting of a single double-convex lens, a negative meniscus and a double-glued confocal positive lens, the second component is installed movable along the optical axis, and the posterior lens group consists of a DOUBLE-POUPL lens, a negative meniscus convex to the secondary image plane, a two-glued lens composed of lenses with different optical powers, and a flat-convex single lens facing the convex side to the secondary plane images. Sources of information taken into account in the examination 1.A. Anikst D.A. Precision theodolites T1 and T05. M., Nedra, 1978, p. 43. 2. Manina A.S., Poltyreva E.S., Elnitska L.G., Krupina TK Direct viewing telescope. Geodesy and Cartography, 1980, No. 3, p. 30-32.