A lightweight white light sight
By designing a lightweight white light sight and using a combination of lenses and prisms with a focusless system, the problems of short exit pupil distance and small diameter of existing sights have been solved, achieving a wider field of view and a longer exit pupil distance, while reducing weight and manufacturing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING NORTH GREAT WALL PHOTOELECTRIC INSTR CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-07-31
AI Technical Summary
Existing scopes have short exit pupil distances and small exit pupil diameters, which means that users can only use them at close range and are prone to losing the target when their arms shake. This also increases the weight and manufacturing costs.
Design a lightweight white light sight that employs a focusless system consisting of protective glass, multiple lenses, and prisms, including an objective lens group and an eyepiece group. The lenses are standard spherical with a large exit pupil diameter and long distance, reducing the number of lenses to lower the size and cost.
It achieves a wider field of view and a greater exit pupil distance, reduces the user's burden, lowers processing costs, and can still produce clear images when the eye is off-center, making it suitable for observation in dark scenes.
Smart Images
Figure CN224581755U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of optical technology, and in particular to a lightweight white light sight. Background Technology
[0002] A scope is an optical device used to assist in accurate aiming at a target. It magnifies the target through optical principles and provides accurate target position information, enabling the shooter to aim at the target more accurately.
[0003] A sight increases the size of the scene by controlling the focal length of the objective lens and the eyepiece. When the focal length of the objective lens is f... 物 The eyepiece focal length is f 目 At that time, the magnification of the scope ω = f 物 / f 目 .
[0004] Currently available scopes have short exit pupil distances and small exit pupil diameters, typically around 30mm and 4mm. Users can only aim from a close distance to the scope and their arms must remain still; otherwise, the image will not be fully focused in their eyes, resulting in the loss of the target. Utility Model Content
[0005] To overcome the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a lightweight white light sight that is smaller in size, has a larger exit pupil diameter, and a longer exit pupil distance, thereby reducing the user's burden, increasing the field of view, and ensuring clear imaging on the eye even when the eye is off-center, while reducing manufacturing costs.
[0006] The technical solution of this utility model is: This lightweight white light sight includes a protective glass (L1), a first lens (L2), a second lens (L3), a first prism (L4), a second prism (L5), a third lens (L6), a reticle (L7), a fourth lens (L8), a fifth lens (L9), and a sixth lens (L10) arranged sequentially along the optical axis from the object side to the image side.
[0007] The protective glass is flat glass. The first lens is a meniscus lens with positive optical power and a convex surface facing the object side. The second lens is a biconvex lens. The first prism is a semi-pentagonal prism. The second prism is a roof prism. The third lens is a plano-concave lens with a flat surface facing the object side. The fourth lens is a biconcave lens. The fifth lens is a biconvex lens. The sixth lens is a biconvex lens.
[0008] The first lens, the second lens, the first prism, the second prism, and the third lens form the objective lens group, and the fourth lens, the fifth lens, and the sixth lens form the eyepiece group. Together, they constitute a focalless system, and all the lenses are standard spherical lenses.
[0009] The beneficial technical effects of this utility model are: smaller size, larger exit pupil diameter, longer exit pupil distance, reduced user burden, increased field of vision, clear image on the eye even after eye displacement, and reduced processing costs. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the optical structure of the lightweight white light sight according to this utility model.
[0011] Figure 2 This is a schematic diagram of the exit pupil distance and eye point distance of the lightweight white light sight according to this utility model.
[0012] Figure 3 This is the field curvature distortion diagram of the optical field of view of the lightweight white light sight according to this utility model.
[0013] Figure 4 This is an optical dot pattern of the lightweight white light sight according to this utility model. Detailed Implementation
[0014] like Figure 1 As shown, this lightweight white light sight includes a protective glass L1, a first lens L2, a second lens L3, a first prism L4, a second prism L5, a third lens L6, a reticle L7, a fourth lens L8, a fifth lens L9, and a sixth lens L10 arranged sequentially along the optical axis from the object side to the image side.
[0015] The protective glass is flat glass. The first lens is a meniscus lens with positive optical power and a convex surface facing the object side. The second lens is a biconvex lens. The first prism is a semi-pentagonal prism. The second prism is a roof prism. The third lens is a plano-concave lens with a flat surface facing the object side. The fourth lens is a biconcave lens. The fifth lens is a biconvex lens. The sixth lens is a biconvex lens.
[0016] The first lens, the second lens, the first prism, the second prism, and the third lens form the objective lens group, and the fourth lens, the fifth lens, and the sixth lens form the eyepiece group. Together, they constitute a focalless system, and all the lenses are standard spherical lenses.
[0017] The beneficial technical effects of this utility model are: smaller size, larger exit pupil diameter, longer exit pupil distance, reduced user burden, increased field of vision, clear image on the eye even after eye displacement, and reduced processing costs.
[0018] Preferably, the first lens and the second lens are cemented together, and the fourth lens and the fifth lens are cemented together. This makes the structure compact and easy to carry.
[0019] Preferably, such as Figure 2As shown, the scope has an entrance pupil diameter of 18mm, an exit pupil diameter of 6mm, an exit pupil distance of 60mm, an eyepoint distance of 50.75mm, an objective lens focal length of 78mm, and an eyepiece focal length of 26mm.
[0020] Figure 3 This is the field curvature distortion diagram of the optical field of view of this lightweight white light sight. The maximum distortion of the sight is 1.5%, which is less than 3% and meets the observation requirements.
[0021] Figure 4 This is the optical dot pattern of this lightweight white light sight. The RMS spot radius of the sight is 0.56 radians per minute in the main field of view and 1.612 radians per minute in the peripheral field of view.
[0022] Preferably, the focal lengths are: 296mm ≤ first lens focal length ≤ 299mm, 109mm ≤ second lens focal length ≤ 112mm, -21mm ≤ third lens focal length ≤ -19mm, -52mm ≤ fourth lens focal length ≤ -50mm, 39mm ≤ fifth lens focal length ≤ 42mm, and 78mm ≤ sixth lens focal length ≤ 84mm. The advantages of this structure are:
[0023] 1. The larger entrance pupil diameter (18mm) allows for greater light intake of the scope, improving the brightness of the field of view and making it more suitable for darker scenes.
[0024] 2. The larger exit pupil diameter (6mm) makes it easier for the user to observe the target when aiming, and at the same time, it is not easy to lose the field of vision when the head moves.
[0025] 3. The longer eye-to-eye distance (50.75mm) allows the user's eye to be further away from the scope and the gun, reducing the impact of recoil on the user during firing.
[0026] 4. The objective lens adopts a combination of a positive lens group and a negative lens group, which reduces the overall length of the aiming scope. At the same time, the prism group of the aiming scope is about the same size as the eyepiece diameter, which reduces the overall diameter of the aiming scope and thus reduces its volume.
[0027] 5. All lenses are spherical lenses, which facilitates processing and reduces processing costs.
[0028] 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 compact white light riflescope, characterized by: It includes a protective glass (L1), a first lens (L2), a second lens (L3), a first prism (L4), a second prism (L5), a third lens (L6), a reticle (L7), a fourth lens (L8), a fifth lens (L9), and a sixth lens (L10) arranged sequentially along the optical axis from the object side to the image side. The protective glass is flat glass. The first lens is a meniscus lens with positive optical power and a convex surface facing the object side. The second lens is a biconvex lens. The first prism is a semi-pentagonal prism. The second prism is a roof prism. The third lens is a plano-concave lens with a flat surface facing the object side. The fourth lens is a biconcave lens. The fifth lens is a biconvex lens. The sixth lens is a biconvex lens. The first lens, the second lens, the first prism, the second prism, and the third lens form the objective lens group, and the fourth lens, the fifth lens, and the sixth lens form the eyepiece group. Together, they constitute a focalless system, and all the lenses are standard spherical lenses.
2. The compact white light riflescope of claim 1, wherein: The first lens is cemented to the second lens, and the fourth lens is cemented to the fifth lens.
3. The compact white light riflescope of claim 2, wherein: The scope has an entrance pupil diameter of 18mm, an exit pupil diameter of 6mm, an exit pupil distance of 60mm, an eyepoint distance of 50.75mm, an objective lens focal length of 78mm, and an eyepiece focal length of 26mm.
4. The compact white light riflescope of claim 3, wherein: 296mm≤First lens focal length≤299mm, 109mm≤Second lens focal length≤112mm, -21mm≤Third lens focal length≤-19mm, -52mm≤Fourth lens focal length≤-50mm, 39mm≤Fifth lens focal length≤42mm, 78mm≤Sixth lens focal length≤84mm.