A general two-way viewing device for use with a riflescope
Patent Information
- Application Number
- CN202522143643.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-10-10
AI Technical Summary
通常应用于红外与微光光学成像显示的分辨率为640×512，图像显示效果较低
[0008]本实用新型可将原瞄准镜所成的像分束为两路，一路用于目视观察，另一路经观察装置光路成像在探测器上，并由探测器上搭载的WiFi模块，转换为数字信号输出。分光棱镜将瞄准镜出射光线进行分光实现了人眼与显示屏同时成像。本实用新型通过七片式透镜的组合、正负光焦度的分配降低了轴外光束及主光线在各个透镜表面的入射角，降低慧差、像散等光学像差的影响，使其能够在像面呈现清晰的虚像；透镜均采用便于加工的标准球面透镜，使镜头在大批量生产的情况下降低了制造成本，提高了产品性能的一致性。
Smart Images
Figure CN224922102U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical imaging technology, and in particular to a universal dual-channel observation device for use in a sight. Background Technology
[0002] A sight is used for aiming guns, cannons, etc. Its optical system usually includes an objective lens and an eyepiece. The objective lens images the scene onto the reticle, and then the eyepiece images the scene onto the exit pupil outside the sight.
[0003] An eyepiece is a visual optical device used in optical instruments to observe the image formed by a frontal optical system. It is mainly used for visual observation of small real images in telescopes, microscopes, and small displays. The main function of the eyepiece is to magnify the real image, thereby forming a clear virtual image at the distance of the human eye's clear vision.
[0004] In military optical instruments, the exit pupil distance of a scope eyepiece is generally 25mm or more, taking into account the use of goggles and gas masks. This ensures that others cannot observe what the user is looking at.
[0005] Display resolution refers to the ability of a display screen to resolve images. The higher the resolution, the clearer and more detailed the image displayed on the screen. A resolution of 640×512 is typically used for infrared and low-light optical imaging displays, resulting in a relatively low image display quality. Summary of the Invention
[0006] To overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a universal dual-channel observation device for a scope, which enables the scope to be clearly imaged on a display screen while being observed by the human eye, thereby reducing manufacturing costs and improving the consistency of product performance in mass production of the lens.
[0007] The technical solution of this utility model is: This universal dual-path observation device applied to a sight is set behind the sight (1) and includes: a beam splitter (A), an imaging optical path (B) and a detector (C). The imaging optical path uses a combination of 7 lenses, fixedly arranged on the same optical axis. Along the optical axis from the beam splitter side to the detector side, the first lens (L1), second lens (L2), third lens (L3), fourth lens (L4), fifth lens (L5), sixth lens (L6), and seventh lens (L7) are arranged in sequence. The first lens (L1), fourth lens (L4), and sixth lens (L6) are biconvex lenses, the second lens (L2) and third lens (L3) are biconcave lenses, the fifth lens (L5) is a meniscus lens with its concave surface facing the beam splitter side, and the seventh lens (L7) is a meniscus lens with its convex surface facing the beam splitter side. The detector has a resolution of 1024×768 pixels and is equipped with a WiFi module.
[0008] This invention splits the image formed by the original sight into two paths: one for visual observation, and the other, imaged onto a detector via the observation device's optical path. The detector's WiFi module then converts the image into a digital signal for output. A beam splitter prism separates the light emitted from the sight, enabling simultaneous imaging by the human eye and the display screen. This invention reduces the incident angle of the off-axis beam and principal ray on each lens surface through a seven-lens combination and the distribution of positive and negative optical power, thus reducing the effects of coma, astigmatism, and other optical aberrations, resulting in a clear virtual image on the image plane. The lenses are all standard spherical lenses, which are easy to manufacture, reducing manufacturing costs and improving product performance consistency during mass production. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the overall structure of the universal dual-path observation device for use in a scope according to the present invention.
[0010] Figure 2 This is a schematic diagram of the optical system of a universal dual-path observation device for use in a scope according to the present invention.
[0011] Figure 3 The optical transfer function curve is shown for the universal dual-path observation device applied to a scope according to this invention.
[0012] Figure 4 This is an optical dot diagram of a universal dual-path observation device for use in a scope according to the present invention.
[0013] Figure 5 This is a field distortion diagram of a universal dual-path observation device for a scope according to the present invention. Detailed Implementation
[0014] like Figure 1 , 2 As shown, this universal dual-path observation device for use with a scope is located behind the scope 1 and includes: a beam splitter A, an imaging optical path B, and a detector C. The imaging optical path uses a combination of 7 lenses, fixedly arranged on the same optical axis. Along the optical axis from the beam splitter side to the detector side, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 are arranged sequentially. The first lens L1, the fourth lens L4, and the sixth lens L6 are biconvex lenses, the second lens L2 and the third lens L3 are biconcave lenses, the fifth lens L5 is a meniscus lens with its concave surface facing the beam splitter side, and the seventh lens L7 is a meniscus lens with its convex surface facing the beam splitter side. The detector has a resolution of 1024×768 pixels and is equipped with a WiFi module. Figure 1 The middle 2 is the exit pupil.
[0015] This invention splits the image formed by the original sight into two paths: one for visual observation, and the other, imaged onto a detector via the observation device's optical path. The detector's WiFi module then converts the image into a digital signal for output. A beam splitter prism separates the light emitted from the sight, enabling simultaneous imaging by the human eye and the display screen. This invention reduces the incident angle of the off-axis beam and principal ray on each lens surface through a seven-lens combination and the distribution of positive and negative optical power, thus reducing the effects of coma, astigmatism, and other optical aberrations, resulting in a clear virtual image on the image plane. The lenses are all standard spherical lenses, which are easy to manufacture, reducing manufacturing costs and improving product performance consistency during mass production.
[0016] Preferably, the first lens and the second lens are cemented together, and the third lens and the fourth lens are cemented together. The first and third lenses are made of crown glass, and the second and fourth lenses are made of heavy flint glass. This combination constitutes an achromatic lens and makes the structure compact and easy to carry.
[0017] A beam splitter prism is used to split the light emitted from the scope, enabling simultaneous imaging by the human eye and the display screen. Preferably, the beam splitter prism is a 20mm × 20mm × 20mm cube, which can be adapted to the exit pupil position of most scopes.
[0018] Preferably, the lens is suitable for a display screen with a resolution of 1024×768 and a pixel size of 7.8 μm.
[0019] Preferably, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7, with the following parameters: 3 mm ≤ f1 ≤ 5 mm, -10 mm ≤ f2 ≤ -5 mm, -5 mm ≤ f3 ≤ -1 mm, 5 mm ≤ f4 ≤ 10 mm, 20 mm ≤ f5 ≤ 25 mm, 10 mm ≤ f6 ≤ 15 mm, and 40 mm ≤ f7 ≤ 50 mm.
[0020] Figure 3 This represents the optical transfer function (OPF) of the system. At spatial frequencies of 0–80 lp / mm, the central field-of-view transfer function is approximately 0.8, indicating excellent imaging quality.
[0021] Figure 4 The optical dot pattern is for a general dual-path observation device used in a scope. The RMS spot radius is 1.38 μm in the main field of view and 3.58 μm in the peripheral field of view.
[0022] Figure 5 The field distortion pattern of the universal dual-path observation device used in gun sights is less than 3%, which meets the observation requirements.
[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.
Claims
1. A universal dual-channel observation device for use with a sight, characterized in that: It is positioned behind the sight (1) and includes: a beam splitter (A), an imaging optical path (B), and a detector (C); The imaging optical path uses a combination of 7 lenses, fixedly arranged on the same optical axis. Along the optical axis from the beam splitter side to the detector side, the first lens (L1), second lens (L2), third lens (L3), fourth lens (L4), fifth lens (L5), sixth lens (L6), and seventh lens (L7) are arranged in sequence. The first lens (L1), fourth lens (L4), and sixth lens (L6) are biconvex lenses, the second lens (L2) and third lens (L3) are biconcave lenses, the fifth lens (L5) is a meniscus lens with its concave surface facing the beam splitter side, and the seventh lens (L7) is a meniscus lens with its convex surface facing the beam splitter side. The detector has a resolution of 1024×768 pixels and is equipped with a WiFi module.
2. The universal dual-channel observation device for a sight according to claim 1, characterized in that: The first lens is cemented with the second lens, and the third lens is cemented with the fourth lens. The first and third lenses are made of crown glass, and the second and fourth lenses are made of heavy flint glass.
3. The universal dual-channel observation device for a sight according to claim 1, characterized in that: The beam splitter is a cube with dimensions of 20mm × 20mm × 20mm.
4. The universal dual-channel observation device for a sight according to claim 1, characterized in that: The lens is suitable for displays with a resolution of 1024×768 and a pixel size of 7.8 μm.
5. The universal dual-channel observation device for a sight according to claim 1, characterized in that: The focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7. The following parameters are given: 3 mm ≤ f1 ≤ 5 mm, -10 mm ≤ f2 ≤ -5 mm, -5 mm ≤ f3 ≤ -1 mm, 5 mm ≤ f4 ≤ 10 mm, 20 mm ≤ f5 ≤ 25 mm, 10 mm ≤ f6 ≤ 15 mm, and 40 mm ≤ f7 ≤ 50 mm.