Compact long-exit-pupil-distance sighting telescope optical system

Abstract

The invention relates to the technical field of optical systems, in particular to a compact long-exit-pupil-distance sighting telescope optical system which comprises a cemented objective lens, a second objective lens, a semi-pentaprism, a roof prism, a cemented eyepiece, a second eyepiece lens and a third eyepiece lens. The length of the whole optical system is compressed to 95.59 mm, the whole optical system realizes light weight, compactness, miniaturization, 3 times of optical zoom, 7.5-degree field of view, 65 mm exit pupil distance and 7.5 mm exit pupil diameter, and the lens body diameter of the prism position can be effectively controlled through the cooperation of the half pentaprism and the roof prism, so that the lens body diameter of the prism position can be effectively controlled. By the adoption of the technical scheme, the problems that a traditional sighting telescope system is small in exit pupil distance and inconvenient to carry are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical systems, and particularly to a compact long eye relief aiming scope optical system. Background Art

[0002] Military aiming scopes are optical aiming devices designed specifically for military use. They are usually mounted on rifles, sniper rifles, machine guns or other weapon systems to improve shooting accuracy, target recognition ability and combat effectiveness. Their main functions include magnifying the target image, providing clear aiming reticles (such as crosshairs, mil dots, etc.), and maintaining stable performance in complex battlefield environments (such as low light, smoke, vibration, etc.). And to ensure the safety of the shooter and avoid the harm of smoke bombs, military aiming telescopic systems need to be equipped with eye cups, forehead protectors and goggles.

[0003] However, with the development of military weaponry, traditional aiming telescopic systems have a small eye relief and are not convenient to carry. Summary of the Invention

[0004] The purpose of the present invention is to provide a compact long eye relief aiming scope optical system to solve the problems of small eye relief and inconvenient portability of traditional aiming telescopic systems.

[0005] To achieve the above purpose, the present invention provides a compact long eye relief aiming scope optical system. The compact long eye relief aiming scope optical system includes a cemented objective lens, an objective second lens, a half pentaprism, a roof prism, a cemented eyepiece, an eyepiece second lens and an eyepiece third lens. The cemented objective lens, the objective second lens, the half pentaprism, the roof prism, the cemented eyepiece, the eyepiece second lens and the eyepiece third lens are sequentially arranged between the object side and the image side; The cemented objective lens is composed of two lenses made of different materials and glued together. The left side of the cemented objective lens is convex. The left side of the objective second lens is convex, and the right side of the objective second lens is concave. The cemented eyepiece is composed of two lenses made of different materials and glued together, and is arranged in a meniscus lens structure. The convex surface of the cemented eyepiece faces the image side. The eyepiece second lens is in a meniscus lens structure, and the convex surface of the eyepiece second lens faces the image side. The eyepiece third lens is in a double convex lens structure.

[0006] Wherein, the distance between the left side of the cemented objective lens and the right side of the eyepiece third lens is 95.59 mm.

[0007] Among them, the central distance between the right side of the cemented objective lens and the left side of the second objective lens is 14.83 mm, the distance between the central position on the right side of the second objective lens and the left side of the semi-pentaprism is 13.78 mm, the distance between the right side of the roof prism and the central position on the left side of the cemented eyepiece is 13.76 mm, the distance between the central position on the right side of the cemented eyepiece and the central position on the left side of the second eyepiece lens is 0.5 mm, and the distance between the central position on the right side of the second eyepiece lens and the central position on the side of the third eyepiece lens is 0.5 mm.

[0008] Among them, the maximum diameter of the cemented objective lens is 24.5 mm, the maximum diameter of the second objective lens is 20 mm, the maximum diameter of the cemented eyepiece is 25 mm, the maximum diameter of the second eyepiece lens is 29 mm, and the maximum diameter of the third eyepiece lens is 30 mm.

[0009] Among them, the left-end curvature radius of the left lens of the cemented objective lens is 40.89 mm, the right-end curvature radius of the left lens of the cemented objective lens is -59.14 mm, the central thickness of the left lens of the cemented objective lens is 5.5 mm, the left-end curvature radius of the right lens of the cemented objective lens is -59.14 mm, the right-end curvature radius of the right lens of the cemented objective lens is -287.04 mm, the central thickness of the right lens of the cemented objective lens is 1.5 mm, the left-end curvature radius of the second objective lens is 20.19 mm, the right-end curvature radius of the second objective lens is 17.18 mm, and the central thickness of the second objective lens is 2.5 mm.

[0010] Among them, the left-end curvature radius of the left lens of the cemented eyepiece is -9.84 mm, the right-end curvature radius of the left lens of the cemented eyepiece is -133.57 mm, the central thickness of the left lens of the cemented eyepiece is 2.5 mm, the left-end curvature radius of the right lens of the cemented eyepiece is -133.57 mm, the right-end curvature radius of the right lens of the cemented eyepiece is -15.28 mm, the central thickness of the right lens of the cemented eyepiece is 7.5 mm, the left-end curvature radius of the second eyepiece lens is -134.02 mm, the right-end curvature radius of the second eyepiece lens is -28.22 mm, the central thickness of the second eyepiece lens is 6 mm, the left-end curvature radius of the third eyepiece lens is 62.69 mm, the right-end curvature radius of the third eyepiece lens is -118.06 mm, and the central thickness of the third eyepiece lens is 5.5 mm.

[0011] A compact long eye relief aiming scope optical system of the present invention includes a cemented objective lens, a second objective lens, a half pentaprism, a roof prism, a cemented eyepiece, a second eyepiece lens, and a third eyepiece lens. Through reasonable optical system design, by combining cemented lenses (the cemented objective lens and the cemented eyepiece) with single lenses (the second objective lens, the second eyepiece lens, and the third eyepiece lens), the length of the entire optical system is compressed to 95.59 mm, and the entire optical system is made lightweight, compact, and miniaturized. Up to 3x optical zoom is achieved, with a 7.5° field of view, meeting an eye relief of 65 mm and an exit pupil diameter of 7.5 mm. And through the cooperation of the half pentaprism and the roof prism, the body diameter at the prism position can be effectively controlled, making the entire telescopic sight system of the aiming scope convenient to carry. By adopting this technical solution, the problems of small eye relief and inconvenience in carrying of the traditional aiming telescopic system are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 FIG. is a schematic structural diagram of the compact long eye relief aiming scope optical system provided by the present invention.

[0014] Figure 2 FIG. is a schematic diagram of the field curvature and distortion curve of the compact long eye relief aiming scope optical system provided by the present invention.

[0015] Figure 3 FIG. is the spot diagram of the compact long eye relief aiming scope optical system provided by the present invention.

[0016] Figure 4 FIG. is a schematic diagram of the relative illumination curve of the compact long eye relief aiming scope optical system provided by the present invention.

[0017] 1 - Cemented objective lens, 2 - Second objective lens, 3 - Half pentaprism, 4 - Roof prism, 5 - Cemented eyepiece, 6 - Second eyepiece lens, 7 - Third eyepiece lens. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as a limitation of the present invention.

[0019] Please refer to Figures 1 to 4 , the present invention provides a compact long eye relief aiming scope optical system. The compact long eye relief aiming scope optical system includes a cemented objective lens 1, an objective second lens 2, a half pentaprism 3, a roof prism 4, a cemented eyepiece 5, an eyepiece second lens 6, and an eyepiece third lens 7. The cemented objective lens 1, the objective second lens 2, the half pentaprism 3, the roof prism 4, the cemented eyepiece 5, the eyepiece second lens 6, and the eyepiece third lens 7 are sequentially arranged between the object side and the image side; The cemented objective lens 1 is composed of two lenses made of different materials. The left side of the cemented objective lens 1 is convex. The left side of the objective second lens 2 is convex, and the right side of the objective second lens 2 is concave. The cemented eyepiece 5 is composed of two lenses made of different materials and is arranged in a meniscus lens structure. The convex surface of the cemented eyepiece 5 faces the image side. The eyepiece second lens 6 is in a meniscus lens structure, and the convex surface of the eyepiece second lens 6 faces the image side. The eyepiece third lens 7 is in a double convex lens structure.

[0020] In this embodiment, through reasonable optical system design, by combining cemented lenses (the cemented objective lens 1 and the cemented eyepiece 5) with single-piece lenses (the objective second lens 2, the eyepiece second lens 6, and the eyepiece third lens 7), the length of the entire optical system is compressed to 95.59 mm, and the entire optical system is made lightweight, compact, and miniaturized. Up to 3x optical zoom, a 7.5° field of view is achieved, meeting an eye relief of 65 mm and an exit pupil diameter of 7.5 mm. Moreover, through the cooperation of the half pentaprism 3 and the roof prism 4, the body diameter at the prism position can be effectively controlled, making the entire telescopic sight system convenient to carry. By adopting this technical solution, the problems of small eye relief and inconvenience in carrying of traditional telescopic sight systems are solved.

[0021] Furthermore, the distance between the left side of the cemented objective lens 1 and the right side of the eyepiece third lens 7 is 95.59 mm, making the entire structure more compact, reducing the body length of the entire telescope, saving costs, and being convenient to carry.

[0022] Further, the central distance between the right side of the cemented objective lens 1 and the left side of the second objective lens 2 is 14.83 mm, the distance between the central position on the right side of the second objective lens 2 and the left side of the semi-pentaprism 3 is 13.78 mm, the distance between the right side of the roof prism 4 and the central position on the left side of the cemented eyepiece 5 is 13.76 mm, the distance between the central position on the right side of the cemented eyepiece 5 and the central position on the left side of the second eyepiece lens 6 is 0.5 mm, and the distance between the central position on the right side of the second eyepiece lens 6 and the central position on the side of the third eyepiece lens 7 is 0.5 mm. The close contact between each lens can effectively shorten the total length of the optical system, optimize the propagation path of the light beam, and make the imaging clearer and more stable.

[0023] Further, the maximum diameter of the cemented objective lens 1 is 24.5 mm, the maximum diameter of the second objective lens 2 is 20 mm, the maximum diameter of the cemented eyepiece 5 is 25 mm, the maximum diameter of the second eyepiece lens 6 is 29 mm, and the maximum diameter of the third eyepiece lens 7 is 30 mm. The contour diameters of each lens are relatively small, thus reducing the weight and saving costs.

[0024] Further, the left-end curvature radius of the left lens of the cemented objective lens 1 is 40.89 mm, the right-end curvature radius of the left lens of the cemented objective lens 1 is -59.14 mm, the central thickness of the left lens of the cemented objective lens 1 is 5.5 mm, the left-end curvature radius of the right lens of the cemented objective lens 1 is -59.14 mm, the right-end curvature radius of the right lens of the cemented objective lens 1 is -287.04 mm, the central thickness of the right lens of the cemented objective lens 1 is 1.5 mm, the left-end curvature radius of the second objective lens 2 is 20.19 mm, the right-end curvature radius of the second objective lens 2 is 17.18 mm, and the central thickness of the second objective lens 2 is 2.5 mm.

[0025] Further, the left-end curvature radius of the left lens of the cemented eyepiece 5 is -9.84 mm, the right-end curvature radius of the left lens of the cemented eyepiece 5 is -133.57 mm, the central thickness of the left lens of the cemented eyepiece 5 is 2.5 mm, the left-end curvature radius of the right lens of the cemented eyepiece 5 is -133.57 mm, the right-end curvature radius of the right lens of the cemented eyepiece 5 is -15.28 mm, the central thickness of the right lens of the cemented eyepiece 5 is 7.5 mm, the left-end curvature radius of the second eyepiece lens 6 is -134.02 mm, the right-end curvature radius of the second eyepiece lens 6 is -28.22 mm, the central thickness of the second eyepiece lens 6 is 6 mm, the left-end curvature radius of the third eyepiece lens 7 is 62.69 mm, the right-end curvature radius of the third eyepiece lens 7 is -118.06 mm, and the central thickness of the third eyepiece lens 7 is 5.5 mm.

[0026] Furthermore, the second objective lens 2, the second eyepiece lens 6, and the third eyepiece lens 7 are all spherical lenses.

[0027] Furthermore, the cemented objective lens 1, the second objective lens 2, the semi-pentaprism 3, the roof prism 4, the cemented eyepiece 5, the second eyepiece lens 6, and the third eyepiece lens 7 are all made of Chengdu Guangming glass materials; The manufacturing materials of the cemented objective lens 1 are Chengdu Guangming glass H-ZLAF55C and H-ZPK5; The manufacturing material of the second objective lens 2 is Chengdu Guangming glass H-ZF73; The manufacturing material of the semi-pentaprism 3 is Chengdu Guangming glass H-BAK7; The manufacturing material of the roof prism 4 is Chengdu Guangming glass H-BAK7; The manufacturing materials of the cemented eyepiece 5 are Chengdu Guangming glass H-ZK50 and H-ZF52; The manufacturing material of the second eyepiece lens 6 is Chengdu Guangming glass H-ZPK3; The manufacturing material of the third eyepiece lens 7 is Chengdu Guangming glass H-LAK52.

[0028] In summary, the beneficial effects of using a compact long eye relief aiming scope optical system provided by the present invention include: 1. Through reasonable optical system design, by adopting the combination of cemented lenses and single lenses, the length of the entire optical system is compressed to 95.59 mm, and the entire optical system realizes lightweight, compactness, and miniaturization. Up to 3x optical zoom, a 7.5° field of view is achieved, meeting an exit pupil distance of 65 mm and an exit pupil diameter of 7.5 mm; 2. Through the cooperation of the semi-pentaprism 3 and the roof prism 4, the body diameter at the prism position can be effectively controlled, making the entire telescopic sight system of the aiming scope convenient to carry; 3. The eyepiece group is compressed to three groups of lenses, and the shortest distance between the second eyepiece lens 6 and the third eyepiece lens 7 is compressed to 0.5 mm, making the structure more compact and stable.

[0029] The above-disclosed is only a preferred embodiment of the present invention. Of course, the scope of the rights of the present invention cannot be limited by this. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A compact long eye relief aiming scope optical system, characterized in that it includes a cemented objective lens, an objective second lens, a semi-pentaprism, a roof prism, a cemented eyepiece, an eyepiece second lens and an eyepiece third lens, and the cemented objective lens, the objective second lens, the semi-pentaprism, the roof prism, the cemented eyepiece, the eyepiece second lens and the eyepiece third lens are sequentially arranged between the object side and the image side; the cemented objective lens is composed of two lenses made of different materials, the left side of the cemented objective lens is convex, the left side of the objective second lens is convex, the right side of the objective second lens is concave, the cemented eyepiece is composed of two lenses made of different materials and is arranged in a meniscus lens structure, the convex surface of the cemented eyepiece faces the image side, the eyepiece second lens is in a meniscus lens structure, the convex surface of the eyepiece second lens faces the image side, and the eyepiece third lens is in a biconvex lens structure.

2. The compact long eye relief aiming scope optical system according to claim 1, characterized in that the distance between the left side of the cemented objective lens and the right side of the eyepiece third lens is 95.59 mm.

3. The compact long eye relief aiming scope optical system according to claim 2, characterized in that the central distance between the right side of the cemented objective lens and the left side of the objective second lens is 14.83 mm, the distance between the central position on the right side of the objective second lens and the left side of the semi-pentaprism is 13.78 mm, the distance between the right side of the roof prism and the central position on the left side of the cemented eyepiece is 13.76 mm, the distance between the central position on the right side of the cemented eyepiece and the central position on the left side of the eyepiece second lens is 0.5 mm, and the distance between the central position on the right side of the eyepiece second lens and the central position on the side of the eyepiece third lens is 0.5 mm.

4. The compact long eye relief aiming scope optical system according to claim 3, characterized in that the maximum diameter of the cemented objective lens is 24.5 mm, the maximum diameter of the objective second lens is 20 mm, the maximum diameter of the cemented eyepiece is 25 mm, the maximum diameter of the eyepiece second lens is 29 mm, and the maximum diameter of the eyepiece third lens is 30 mm.

5. The compact long eye relief aiming scope optical system according to claim 4, characterized in that the left end curvature radius of the left lens of the cemented objective lens is 40.89 mm, the right end curvature radius of the left lens of the cemented objective lens is -59.14 mm, the central thickness of the left lens of the cemented objective lens is 5.5 mm, the left end curvature radius of the right lens of the cemented objective lens is -59.14 mm, the right end curvature radius of the right lens of the cemented objective lens is -287.04 mm, the central thickness of the right lens of the cemented objective lens is 1.5 mm, the left end curvature radius of the objective second lens is 20.19 mm, the right end curvature radius of the objective second lens is 17.18 mm, and the central thickness of the objective second lens is 2.5 mm.

6. The compact long eye relief aiming scope optical system according to claim 5, characterized in that The left end curvature radius of the left lens of the glued eyepiece is -9.84 mm, the right end curvature radius of the left lens of the glued eyepiece is -133.57 mm, the central thickness of the left lens of the glued eyepiece is 2.5 mm, the left end curvature radius of the right lens of the glued eyepiece is -133.57 mm, the right end curvature radius of the right lens of the glued eyepiece is -15.28 mm, the central thickness of the right lens of the glued eyepiece is 7.5 mm, the left end curvature radius of the second eyepiece lens is -134.02 mm, the right end curvature radius of the second eyepiece lens is -28.22 mm, the central thickness of the second eyepiece lens is 6 mm, the left end curvature radius of the third eyepiece lens is 62.69 mm, the right end curvature radius of the third eyepiece lens is -118.06 mm, and the central thickness of the third eyepiece lens is 5.5 mm.

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