Sighting telescope light path system and sighting telescope comprising sighting telescope light path system

Abstract

The invention provides an inner red dot sighting telescope light path system. The inner red dot sighting telescope light path system comprises an LED light source module, an objective lens and a lens or plate glass arranged on an emergent light path of the LED light source module. The optical axis of the lens is coaxial with the light source center of the LED light source module to form a reference optical axis, or the range of the vertical distance K between the optical axis of the lens and the reference optical axis is 0 < = K < = 3mm or-3 < = K < = 0mm; the lens or the plate glass is perpendicular to the reference optical axis or forms an included angle beta with the reference optical axis: 0 degree < = beta < = 20 degrees or-20 degrees < = beta < = 0 degree; the numerical value L from the lens or the plate glass to the LED light source module is 0 lt; l is less than or equal to 100mm. According to the invention, the lens is additionally arranged near the LED light source module, so that the optical imaging error of the reflection division image of the optical system is reduced, the imaging light energy is strong, the imaging light spot contour is clear, and the phenomena of central point shaking of the imaging light spot, shaking of an edge aperture, distortion, pulling, twisting and the like are improved.

Description

Technical Field

[0001] This invention belongs to the field of firearm sight technology, specifically relating to a sight optical path system and a sight containing the sight optical path system. Background Technology

[0002] In existing red dot sights, to adjust the direction of the emitted light, the light source 2, i.e., the LED chip (LED chip module), is typically installed... Figure 1 The rear end of the sight housing 1 shown is specifically fixed to a light source adjustment base at the rear end, such as the light source support 3 at the front end of the light source adjustment mechanism for the inner red dot sight provided in Chinese invention patent No. 201620980504.9 (i.e., the light source is fixed to the LED chip module mounting base described in Chinese invention patent No. 202011064636.4, and this light source support 3 is fixed to the slider base 6) (see Figure 2 ).

[0003] As red dot sights become smaller, the focal length of optical systems also decreases. Simultaneously, there's a growing preference for large fields of view and large image sources. This leads to distortion and blurring issues caused by the reflection of the reticle image from the optical system. Summary of the Invention

[0004] The purpose of this invention is to improve the reflection reticle image problems caused by the above-mentioned issues, so as to improve the reflection imaging quality.

[0005] To achieve the above objectives, the present invention provides a sight optical path system, including an LED light source module and an objective lens that reflects the light emitted from the LED light source module to form an aiming point. The system is characterized by further including an optical element disposed on the outgoing light path of the LED light source module and adjacent to the LED light source module, causing the outgoing light to converge, thereby improving the stability and energy of the imaging spot reflected by the objective lens, resulting in a clear and distortion-free imaging profile. Both sides of the optical element are coated with two or more layers of light-transmitting or blocking films.

[0006] The aforementioned optical element is a lens, whose optical axis is coaxial with the center of the LED light source module to form a reference optical axis, or the vertical distance K between the optical axis of the lens and the reference optical axis is 0≤K≤3mm or -3≤K≤0mm.

[0007] The aforementioned optical element is perpendicular to the reference optical axis, or forms an angle β with the reference optical axis: 0°≤β≤20° or -20°≤β≤0°; the distance L between the optical element and the LED light source module is: 0 <L≤100mm。

[0008] Furthermore, the optical elements are lenses or flat glass.

[0009] Furthermore, the lens is either a spherical lens or an aspherical lens.

[0010] Further, the lens is a plano-convex lens, a biconvex lens, a plano-concave lens, a biconcave lens, a cemented lens, a microlens, a microlens array, a holographic lens, a waveguide lens, a refractive lens, a binary optical lens, a diffractive lens or a superlens.

[0011] An inner red dot sight or a reflective sight containing the aforementioned sighting optical path system, comprising a light source support, and the special feature is that the LED light source module is fixed in the U-shaped groove on the front side of the light source support; the optical element is fixed on the front side of the light source support and covers the slot opening of the U-shaped groove.

[0012] The beneficial effects of the present application are that by adding a lens near the LED light source module, the optical imaging error of the reflected reticle image of the optical system is greatly reduced, the imaging light energy is strong, the imaging spot profile is clear, and the phenomena of center point shaking, edge aperture shaking, distortion, stretching and twisting of the imaging spot are greatly improved.

[0013] The present application will be described in detail below in conjunction with the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of an existing inner red dot sight housing.

[0015] Figure 2 It is a schematic diagram of an existing light source adjusting mechanism for an inner red dot sight.

[0016] Figure 3 It is a schematic diagram of an inner red dot sight optical path system provided by an embodiment.

[0017] Figure 4 It is a schematic diagram of the lens optical axis coinciding with the light source optical axis to form a reference optical axis.

[0018] Figure 5 It is a schematic diagram of the lens optical axis deviating upward from the reference optical axis.

[0019] Figure 6 It is a schematic diagram of the lens optical axis deviating downward from the reference optical axis.

[0020] Figure 7 It is a schematic diagram of the flat glass being perpendicular to the reference optical axis and the center of the flat glass being on the reference optical axis.

[0021] Figure 8 It is a schematic diagram of the flat glass being inclined forward by an angle β.

[0022] Figure 9 It is a schematic diagram of the flat glass being inclined backward by an angle β.

[0023] Figure 10 It is a schematic diagram of the lens being inclined forward by an angle β.

[0024] Figure 11 is a schematic diagram of the lens backward tilt angle β.

[0025] Figure 12 is a schematic diagram of the existing reflective optical system, i.e. only the light source module and the objective lens.

[0026] Figure 13 is a schematic diagram of the reflective light path after adding a lens near the LED light source module.

[0027] Figure 14 is an exploded view of a light source adjusting mechanism for an inner red dot sight according to an embodiment.

[0028] Figure 15 is Figure 14 is a schematic diagram of the light source adjusting mechanism for the inner red dot sight.

[0029] Figure 16 is an axial sectional view of the inner red dot sight according to an embodiment.

[0030] Figure 17 is a first surface diagram of the objective lens as a reflecting surface when the objective lens is an aspherical lens.

[0031] BRIEF DESCRIPTION OF DRAWINGS 1, sight housing; 2, LED light source module or light source; 3, light source support; 4, lens; 5, U-shaped groove; 6, slider seat; 7, objective lens; 8, first vertical spiral spring; 9, second vertical spiral spring; 10, vertical adjusting screw; 11, slider; 12, horizontal adjusting screw; 13, horizontal spiral spring; 14, protective glass; 15, lens mounting frame; 16, first surface; 17, second surface; 18, first light beam; 19, first light spot; 20, exit surface; 21, entrance surface; 22, second light beam; 23, second light spot; 24, reference optical axis; 25, lens optical axis; 26, flat glass; 27, first parallel reflected light; 28, second parallel reflected light. DETAILED DESCRIPTION

[0032] The present application will be further described below in conjunction with the embodiments. However, those skilled in the art will understand that the following examples are only used to illustrate the present application and should not be regarded as limiting the scope of the present application. The specific conditions not mentioned in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments not mentioned by the manufacturer are all conventional products that can be purchased on the market; the specific embodiments described are only used to explain the principles of the present application and are not used to limit the present application.

[0033] Figure 3The shown is a kind of inner red dot sight optical path system, including LED light source module 2 and the objective lens 7 of the exit light of the LED light source module 2 to form sighting point (differentiation image) is reflected, (this is prior art, it is coated on it half transparent film, can be passed through light and reflect specific wavelength light, such as reflecting green light or red light, in the optical system provided in the embodiment, for reflecting the red light emitted by LED light source module 2, forms inner red dot sighting point), special is, in order to overcome the distortion, blur and other problems caused by the reflection of the existing inner red dot sighting optical system differentiation image, especially on the exit light path of LED light source module 2, it is added Figure 3 The shown light-transmitting lens or flat glass (i.e. optical element) is arranged adjacent to the LED light source module 2, so that the exit light of the LED light source module 2 tends to converge after the lens or flat glass, so that the light beam projected onto the objective lens 7 is more convergent than the prior art, thereby improving the stability and energy of the imaging spot reflected by the objective lens 7, so that the imaging profile is clear without distortion; and the optical axis (lens optical axis 25) of the lens 4 is coaxial with the light source center of the LED light source module 2, forming Figure 4 The shown reference optical axis 24, or the vertical distance K of the optical axis of the lens deviating from the reference optical axis 24 is 0≤K≤3mm or -3≤K≤0mm, see Figure 5 、 6 .

[0034] When flat glass 26 is used, the flat glass 26 is perpendicular to the reference optical axis 24, as shown in Figure 7 or forms an angle β with the reference optical axis 24: 0°≤β≤20° or -20°≤β≤0°, as shown in Figure 8 、 9 . Figure 10 、 11 .

[0035] Finally, it needs to be explained that in the embodiment, the distance L of the lens 4 or flat glass 26 from the LED light source module 2 is: 0<L≤100mm. Here, the lens 4 or flat glass 26 is a lens or flat glass coated with 2 or more light-transmitting films or cutoff films (mainly to reduce reflection) on both sides. The lens here can be a spherical lens or an aspherical lens, such as a plano-convex lens, a double-convex lens, a plano-concave lens, a double-concave lens, a cemented lens, a microlens, a microlens array, a holographic lens, a waveguide lens, a binary optical lens, a diffractive lens or a superlens, etc. The appropriate lens can be selected according to actual needs.

[0036] The inner red dot sight optical path system provided in this embodiment significantly reduces the optical imaging error of the reflected reticle image, resulting in strong imaging light energy, clear imaging spot outline, and greatly improving phenomena such as center point jitter, edge aperture jitter, distortion, pulling, and twisting. This positive effect is achieved by combining... Figure 4 , 5 The optical imaging analysis is as follows: in, Figure 12 This is a schematic diagram of the optical path of an existing optical system, which only has a light source module and an objective lens. It is easy to see from the diagram that the emitted light from the light source, i.e. the first light spot 19, is incident on the first surface 16 of the objective lens 7, and after being partially reflected by the first surface 16, it forms the first parallel reflected light 27, which is seen by the human eye after passing through the eyepiece.

[0037] To ensure the stability of the aiming mark (i.e., reflected or differentiated image) as seen by the human eye, and to prevent distortion and blurring, even with a smaller focal length in the optical system, it is necessary to first focus the incident light incident on the reflecting surface of the objective lens 7, i.e., the first surface 16, to accommodate the short focal length or large pattern light source of the entire sight's optical system. Therefore, this embodiment provides... Figure 13 The optical system shown is an optical element, such as lens 4 or flat glass 26, with a multilayered transparent or cut-off film coated on both sides added near the LED light source module. In this optical path, the emitted light from the light source (second light spot 23) is refracted by the incident surface 21 of lens 4, and then projected onto the objective lens 7 by its exit surface 20. After being reflected by the first surface 16 of the objective lens 7, it forms the second parallel reflected light 28. Compared to... Figure 12 The first parallel reflected light 27 shown, after passing through the eyepiece, produces a more concentrated image with clearer contours and smaller imaging errors, significantly improving phenomena such as center point wobble, edge wobble, distortion, pulling, and twisting of the light spot. It should also be noted that when the objective lens 7 provided in the aforementioned embodiment is a cemented lens, its first surface 16 is... Figure 12 The cemented surface shown, when objective lens 7 is an aspherical lens, then the first surface 16 is... Figure 17 The inner surface of the aspherical lens shown is the side facing the light source.

[0038] Based on the foregoing embodiments, this embodiment provides an internal red dot sight or a reflex sight containing the sight optical path system provided in the foregoing embodiments, including... Figure 2 The light source support 3 shown is used, while the LED chip module 2, which constitutes the optical path system of the inner red dot sight provided in the aforementioned embodiment, is fixed in the U-shaped groove 5 on the front side of the light source support 3. Similar to the structure of the prior art, the difference is that the lens 4, which constitutes the optical path system of the inner red dot sight provided in the aforementioned embodiment, is fixed in... Figure 14The front side of the light source support 3 shown and covers the notch of the U-shaped groove 5. Specifically, the lens 4 is fixed on two opposite fixing grooves at the notch of the U-shaped groove 5, as long as the distance from the LED chip module 2 is within the range of 0 < L ≤ 100 mm.

[0039] And Figure 2 , 14 , 15 and 16, the light source adjustment mechanism mainly consists of a light source support 3, a slider seat 6, a first vertical spiral spring 8, a second vertical spiral spring 9 whose lower ends are inserted into blind holes at the tops on both sides of the slider seat 6, a vertical adjustment screw 10 located at the central position of the connection line between the first vertical spiral spring 8 and the second vertical spiral spring 9, a horizontal adjustment screw 12 threadedly connected to the slider 11, and a horizontal spiral spring 13 located on one side of the light source support 3 (the slider and the horizontal adjustment screw are respectively on the opposite side of the light source support 3). Its assembled state is as shown in Figure 15 Shown.

[0040] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor limit the invention to only the specific implementation manners. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A sighting optical path system comprising an LED light source module (2) and an objective lens (7) reflecting the light emitted by the LED light source module (2) to form a sighting point, characterized in that: Also included is an optical element disposed on the light exit path of the LED light source module (2) and adjacent to the LED light source module (2), so that the exit light tends to converge, to improve the stability and energy of the reflected imaging spot through the objective lens (7), so that the imaging profile is clear and distortion-free. The double-sided optical element is coated with 2 or more layers of light-transmitting film or cut-off film.

2. The sight optical path system of claim 1, wherein: The optical element is a lens (4) whose optical axis is coaxial with the light source center of the LED light source module (2), forming a reference optical axis (24), or the optical axis of the lens (4) deviates from the reference optical axis (24) by a vertical distance K, where 0≤K≤3mm or -3≤K≤0mm.

3. The sight optical path system of claim 1, wherein: The optical element is perpendicular to the reference optical axis (24), or forms an angle β with the reference optical axis (24), where 0°≤β≤20° or -20°≤β≤0°; the distance L between the optical element and the LED light source module (2) is 0<L≤100mm.

4. The sight optical path system of claim 3, wherein: The optical element is a lens or a flat glass (26).

5. The sighting optical system of claim 4, wherein: The lens (4) is a spherical lens or an aspherical lens.

6. The sight optical path system of claim 5, wherein: The lens (4) is a plano-convex lens, a biconvex lens, a plano-concave lens, a biconcave lens, a cemented lens, a microlens, a microlens array, a holographic lens, a waveguide lens, a refractive lens, a binary optical lens, a diffractive lens, or a superlens.

7. The sight optical path system of claim 1 or 2 or 3 or 4 or 5 or 6, wherein: The objective lens (7) is a cemented lens or an aspherical lens.

8. An internal red dot sight or a reflex sight containing the optical path system of the sight according to any one of claims 1 to 6, comprising a light source holder (3), characterized in that: The LED light source module (2) is fixed in the U-shaped groove (5) on the front side of the light source support (3); the optical element is fixed on the front side of the light source support (3) and covers the slot of the U-shaped groove (5).

9. The red dot sight or reflex sight of claim 8, wherein, The objective lens (7) is a cemented lens or an aspherical lens.

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