CN109884777B

CN109884777B - High-magnification compact telescopic sighting telescope optical system

Info

Publication number: CN109884777B
Application number: CN201910132248.6A
Authority: CN
Inventors: 张国伟; 王密信; 王海涛; 姚远; 杨晓燕
Original assignee: 717th Research Institute of CSIC
Current assignee: 717th Research Institute of CSIC
Priority date: 2019-02-22
Filing date: 2019-02-22
Publication date: 2021-07-16
Anticipated expiration: 2039-02-22
Also published as: CN109884777A

Abstract

The invention discloses a high-magnification compact telescopic sighting telescope optical system, which comprises an objective lens group, a focusing lens group, a field lens, an image rotating lens group, a reticle and an eyepiece group which are arranged on the same optical axis, wherein infinite parallel light forms convergent light through a chromatic aberration correction objective lens group from an object surface, the convergent light is converged into a primary inverted image point through the focusing lens group, the divergent light is formed, the height of a light beam is greatly compressed through a high-focal-power field lens, the convergent light is formed again and passes through the image rotating lens group, so that an image on a division line converged to the reticle is formed into a secondary positive image point, and finally, a human eye observes an angularly amplified scenery through a large-view field eyepiece group in an Everest eyepiece structure. The invention adopts an internal focusing structural form, has good sealing performance, can be used for short-distance observation, has no folding system, has high consistency on the optical axis of the reticle, directly forms a positive real image for human eyes, has strong capacity of collecting light energy and high magnification.

Description

High-magnification compact telescopic sighting telescope optical system

Technical Field

The invention belongs to the technical field of optics, and particularly relates to a high-magnification compact telescopic sighting telescope optical system.

Background

The white light sighting telescope is an optical device which can be directly used by human eyes, has very important and irreplaceable application value, and has the characteristics of no need of power supply and portability, so that the white light sighting telescope has very wide application environment.

The telescopic sighting telescope is divided into Kepler type, Galileo type, collimation type, holographic sighting telescope and other types, the Kepler type telescopic sighting telescope has small radial size and convenient installation and use, and the division mark is added at the focal plane, so that the observation target can be enlarged, and the sighting precision is high; the Galilean telescope has simple structure, low transmittance and small magnification; the collimating telescopic sighting telescope has small volume and light weight, but has large light loss and low remote sighting precision; the holographic sighting telescope has a complex structural form and poor environmental adaptability.

Disclosure of Invention

In order to solve the problems of low magnification, poor environmental adaptability and the like of the existing white light sighting telescope, the invention provides a high-magnification compact telescopic sighting telescope optical system, which adopts an optical structure form of internal focusing and symmetrical image rotation to realize human eye sighting with high magnification.

The technical scheme adopted by the invention for solving the technical problems is as follows: a high-magnification compact telescopic sighting telescope optical system sequentially comprises an objective lens group, a focusing lens group, a field lens, an image rotating lens group, a reticle and an eyepiece lens group along an optical path, wherein the objective lens group, the focusing lens group, the field lens, the image rotating lens group, the reticle and the eyepiece lens group are on the same optical axis, infinite parallel light forms convergent light through a chromatic aberration correction objective lens group from an object surface, the convergent light is converged into a primary inverted image point through the focusing group, divergent light is formed, the height of the light beam is greatly compressed through the high-power field lens, the convergent light is formed again and passes through the image rotating objective lens group, an image on a division line converged to the reticle is formed into a secondary positive image point, and finally, human eyes observe a scene amplified through the large-view field eyepiece lens group in an Everest eyepiece structure.

The high-magnification compact telescopic sight optical system has a spectrum transmission range of 480 nm-650 nm, and belongs to a direct eye observation and aiming type afocal telescopic system.

The objective group of the high-magnification compact telescopic sighting telescope optical system adopts a single-double objective structure formed by a single lens and a cemented lens, the glass brand adopts high-Abbe-number achromatic materials such as fluorine crown glass and light crown glass, and the entrance pupil of the whole optical system is positioned on a first objective frame of the objective group.

The high-magnification compact telescopic sighting telescope optical system is characterized in that a focusing lens group of the high-magnification compact telescopic sighting telescope optical system is an internal focusing structure formed by two cemented lenses and has negative focal power. The focusing lens group is sealed in the sighting telescope structural part and is driven by a manual or electric mode.

The field lens of the high-magnification compact telescopic sighting telescope optical system is a single-chip high-focal-power positive lens, the first surface is a plane or a spherical surface, and the second surface is a spherical surface.

A compact telescope gun sight optical system of high magnification, its commentaries on classics image lens group magnification selects about 1 times, adopts two symmetry plywoods to constitute, the relative aperture of single group commentaries on classics image lens is at 1: about 2.

The high-magnification compact telescopic sighting telescope optical system is characterized in that a reticle is high-finish flat glass carved with cross-shaped reticle lines.

The high-magnification compact telescopic sighting telescope optical system is characterized in that an eyepiece group of the high-magnification compact telescopic sighting telescope optical system adopts a large-view-field Aierfree structure form, namely, the high-magnification compact telescopic sighting telescope optical system consists of double single lenses and double lenses.

The invention has the beneficial effects that: the optical system can solve the problems of large quality, long length, poor environment resistance, incapability of focusing in a short distance and the like of a high-magnification lens in the prior art. The optical system is based on a Kepler type structural form, achieves high-magnification of a target, is very compact in radial size and light in weight, is convenient to install on various platforms, has a real image point at a focal plane, can achieve high-precision aiming by placing a high-precision reticle, contains an inner focusing group, achieves a fully-sealed close-range focusing form, and can be used in severe environments.

Drawings

FIG. 1 is a schematic diagram of the construction of an optical system of the present invention;

FIG. 2 is a schematic view of an objective lens assembly according to the present invention;

FIG. 3 is a schematic view of a focusing lens assembly of the present invention;

FIG. 4 is a schematic structural diagram of an image inverting lens assembly of the present invention;

FIG. 5 is a schematic structural diagram of the eyepiece set of the present invention.

The figures are numbered: 1-objective lens group, 11-first refracting lens, 12-first refracting cemented lens, 2-focusing lens group, 21-second refracting cemented lens, 22-third refracting cemented lens, 3-field lens, 4-image rotating lens group, 41-fourth refracting cemented lens, 5-reticle, 6-ocular lens group, 61-fifth refracting cemented lens, 62-second refracting lens, 63-sixth refracting cemented lens.

Detailed Description

In order to further clarify the features of the present invention, a detailed description will be given below in conjunction with the accompanying drawings, which are not intended to limit the invention.

As shown in figure 1, the invention discloses a high magnification compact telescopic sighting telescope optical system, belonging to a direct eye viewing and sighting type afocal telescopic system, which comprises an objective lens group 1, a focusing lens group 2, a field lens 3, an image rotating lens group 4, a reticle 5 and an eyepiece group 6 along an optical axis from an object space to eyes, wherein the objective lens group 1, the focusing lens group 2, the field lens 3, the image rotating lens group 4, the reticle 5 and the eyepiece group 6 are on the same optical axis, infinite parallel light passes through the chromatic aberration correction objective lens group 1 from an object surface to form convergent light, the convergent light is converged into a primary inverted image point through the focusing group 2, the divergent light greatly compresses the light beam height through the high-focal-power field lens 3, the convergent light passes through the image rotating objective lens group 4 again, the image on a division line converged to the reticle 5 forms a secondary erect image point, finally, human eyes observe an object amplified by an angle through the large-view field eyepiece group 6 in an Airfvier structure form, the whole magnification is 30 times, the spectrum transmission range of the optical system is 480 nm-650 nm, and the system belongs to a direct-viewing and aiming type afocal telescope system for human eyes.

As shown in fig. 2, the objective lens group 1 adopts a single-double objective lens structure composed of a single lens and a cemented lens, the glass brand adopts a high abbe number achromatic material, such as fluorine crown glass and light crown glass, the entrance pupil of the whole high-magnification compact telescopic sighting telescope optical system is located on the first objective lens frame of the objective lens group 1, and the group is responsible for compressing the aperture of the light beam, and undertakes the correction function of most chromatic aberration, and the relative aperture.

As shown in fig. 3, the focusing lens assembly 2 is in an inner focusing structure form, and is composed of two cemented lenses, so as to form the focusing lens assembly 2 with negative power, which can be sealed in a sighting telescope structural member, and the focusing lens assembly is driven manually or electrically, so as to focus a near-distance target and have a relative aperture.

The field lens 3 is a single-chip high focal power positive lens, the first surface is a plane or a spherical surface, the second surface is a spherical surface, and the height of the off-axis light rays is compressed to be opposite to the aperture.

As shown in fig. 4, the relay lens group 4 is composed of two symmetrical cemented lenses, and the relative aperture of a single relay lens is 1: about 2, and about 1 magnification of the relay lens group 4, relative aperture.

The reticle 5 is high-finish flat glass with cross dividing lines, the cross dividing lines can be etched into scales with different shapes according to actual requirements, and the minimum scale interval meets the requirement of minimum resolution of human eyes.

The eyepiece group 6 adopts a large-view-field Aierfree structure form, namely, a double-lens, a single lens and a double lens, and the relative aperture is formed.

The following table is an optical system structure parameter table of the optical system concrete implementation example of the present invention, which is the embodiment of experimental effect data:

the present invention is not limited to the above-mentioned preferred embodiments, and any person skilled in the art can derive other variants and modifications within the scope of the present invention, however, any variation in shape or structure is within the scope of protection of the present invention, and any technical solution similar or equivalent to the present application is within the scope of protection of the present invention.

Claims

1. The utility model provides a high magnification compact telescope gun sight optical system, includes objective lens group (1), focusing lens group (2), field lens (3), commentaries on classics image lens group (4), reticle (5) and eyepiece group (6) along the light path in proper order, its characterized in that: the system spectrum transmission range is 480 nm-650 nm, the objective lens group (1), the focusing lens group (2), the field lens (3), the image rotating lens group (4), the reticle (5) and the eyepiece lens group (6) are on the same optical axis, infinite parallel light passes through the objective lens group (1) from an object surface to form converging and condensing light, the converging and condensing light is converged into a primary inverted image point through the focusing lens group (2), the diverging light is formed, the light beam height is greatly compressed through the high-focal-power field lens (3), the converging light is formed again and passes through the image rotating lens group (4), so that an image on a division line converged on the reticle (5) forms a secondary positive image point, and an angularly amplified scene is observed by human eyes through the large-field-view eyepiece lens group (6); the focusing lens group (2) is an internal focusing structure consisting of a second refraction cemented lens and a third refraction cemented lens, and has negative focal power; the focusing lens group (2) is sealed in the sighting telescope structural part and is driven manually or electrically; the field lens (3) is a single-chip high-focal-power positive lens, the first surface is a plane or a spherical surface, and the second surface is a spherical surface; the magnification of the image rotating lens group (4) is selected to be 1 time, the image rotating lens group is composed of two symmetrical fourth refraction cemented lenses, and the relative aperture of a single group of image rotating lenses is 1: 2; the reticle (5) is high-finish flat glass carved with cross-shaped dividing lines; the large-view-field Aierfree eyepiece structure formed by the fifth refraction cemented lens, the second refraction lens and the sixth refraction cemented lens is adopted in the eyepiece group (6), the single-double objective structure formed by the first refraction lens and the first refraction cemented lens is adopted in the objective group (1), and the entrance pupil of the system is located on the first objective frame of the objective group (1).