CN220820361U - Fusion red dot aiming system - Google Patents

Abstract

The utility model discloses a fusion red point aiming system which comprises an infrared lens group, a liquid crystal display screen, a prism, a first lens group, a reflecting mirror, a second lens group, a beam splitter and an eyepoint, wherein the infrared lens group, the liquid crystal display screen, the prism, the first lens group, the reflecting mirror, the second lens group, the beam splitter and the eyepoint are sequentially arranged along the direction of a light path, the prism is provided with an inclined plane facing the first lens group, a red point light source part is arranged above the inclined plane, so that light rays of the red point light source part and infrared light of the infrared lens group are transmitted to a beam splitter to enter human eyes after being subjected to light path fusion on the prism, the infrared lens group completes shooting of an external scene target, finally, an image on the liquid crystal display screen and light rays emitted by the red point light source part are subjected to light path fusion on the prism, the fused light rays are subjected to first imaging through the first lens group, the light path is turned through the reflecting mirror to effectively shorten the volume, and then the second lens group is reached, and at the moment, the turning light paths of the infrared light and the red point light reach secondary imaging on the beam splitter.

Description

Fusion red dot aiming system

Technical Field

The utility model relates to the technical field of optical systems, in particular to a fusion red point aiming system.

Background

Existing red spot sighting systems in the market at present are roughly divided into two types: one is that the red spot made by luminescent diode shines on the curved surface beam splitter directly, the beam splitter reflects the red spot into parallel light to enter human eyes, the external scene goal enters human eyes through the beam splitter directly at the same time, realize the fusion of external scene image and red spot on the retina of human eyes; the other is that the red point is placed in the turning light path, the light splitting sheet used for fusion is a flat sheet, the light path of the external view target is not changed, and the parallax is reduced. In the existing red dot sighting system, light entering human eyes possibly enters not in parallel, so that the human eyes are affected by the light, parallax is easy to generate, sighting precision is reduced, most of the sighting system is fusion of visible light and red dots, and the sighting system cannot be used at night and under the condition of insufficient light.

Disclosure of utility model

The utility model mainly aims to provide a fusion red dot sighting system which fuses three light paths of visible light, infrared light and red dot, exerts respective advantages of maximum effect, uses the sighting system in a day and night barrier-free manner, improves sighting accuracy and reduces influence on human eyes.

In order to achieve the above-mentioned objective, the present utility model provides a fusion red point aiming system, which comprises an infrared lens group, a liquid crystal display, a prism, a first lens group, a reflecting mirror, a second lens group, a beam splitter and an eye point, wherein the infrared lens group, the liquid crystal display, the prism, the first lens group, the reflecting mirror, the second lens group, the beam splitter and the eye point are sequentially arranged along the direction of the light path, the prism is provided with an inclined plane facing the first lens group, and a red point light source is arranged above the inclined plane, so that the light of the red point light source and the infrared light of the infrared lens group are transmitted to the beam splitter to enter the human eye after the light path fusion is carried out on the prism;

wherein, the external view object penetrates through the light splitting sheet and enters human eyes.

Optionally, in the fusion red point aiming system, a distance from an apex of the surface of the second lens group to an eye point along an optical axis through the beam splitter is an exit pupil distance, and the exit pupil distance is 87mm.

Optionally, the prism is disposed opposite to the reflecting mirror, the reflecting mirror is inclined towards the first mirror group, and the beam splitter is disposed opposite to the reflecting mirror.

Optionally, the inclination angles of the prism, the reflecting mirror and the light splitting sheet are all 45 °.

Optionally, the infrared lens group includes first lens, second lens and infrared CMOS sensor that set gradually along the light path direction, infrared CMOS sensor will be passed through first lens with the light that the second lens received shows the image on the liquid crystal display through photoelectric conversion.

Optionally, the first lens group includes a third lens, a fourth lens and a fifth lens, where the third lens and the fourth lens are meniscus lenses protruding away from each other, and the fifth lens is a biconvex lens.

Optionally, lens parameters of the third lens and the fourth lens satisfy 1.9 < Nd < 2.05, 15 < Vd < 35;

The lens parameters of the fifth lens meet Nd < 1.75 and Nd < 1.9, and Vd < 30 and Vd < 50.

Optionally, the second lens group includes a sixth lens, a seventh lens and an eighth lens, the sixth lens is a meniscus lens, and the seventh lens and the eighth lens combine to form a glue piece.

Optionally, the lens parameters of the sixth lens satisfy 1.7 < Nd < 1.85, 30 < Vd < 55.

Optionally, the seventh lens is made of ZF material, and the lens parameters are more than 1.8 and less than 1.95, and more than 15 and less than 30;

The eighth lens is made of LAK material, and the lens parameters are more than 1.65 and less than 1.75, and more than 50 and less than 60.

According to the technical scheme, the infrared lens group is used for completing shooting of an external scene target and finally displaying the external scene target on the liquid crystal display, the image on the liquid crystal display and the light emitted by the red point light source are subjected to light path fusion on the prism, at the moment, fusion of infrared light and red point light is completed, the fused light passes through the first lens group to complete first imaging, the light path is turned through the reflecting mirror to effectively shorten the volume, then the light passes through the second lens group to reach the light splitting sheet, at the moment, the fused light path of the infrared light and the red point light is turned on the light splitting sheet to enter an eye point to realize secondary imaging, and meanwhile, the external scene target directly penetrates through the light splitting sheet to enter human eyes to complete fusion of visible light, infrared light and red point light. The advantages of the maximum effect are exerted, the use is free from barriers in day and night, the aiming precision is improved, and meanwhile, the design of a secondary imaging light path is adopted, so that the volume and the weight of the system are greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a fusion red point aiming system according to the present utility model;

FIG. 2 is a schematic view of the path of light in FIG. 1;

fig. 3 is a schematic diagram of another embodiment of the fusion red dot sighting system provided by the present utility model.

Reference numerals illustrate:

Reference numerals	Name of the name	Reference numerals	Name of the name
				100	Fusion red dot aiming system	42	Fourth lens
1	Infrared lens group	43	Fifth lens
				11	First lens	5	Reflecting mirror
12	Second lens	6	Second lens group
				13	Infrared CMOS sensor	61	Sixth lens
2	Liquid crystal display	62	Seventh lens
				3	Prism	63	Eighth lens
4	First lens group	7	Light splitting sheet
				41	Third lens	a	Red point light source

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the case where a directional instruction is involved in the embodiment of the present utility model, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

There are two general types of red spot sighting systems currently available in the market:

A red dot made of light emitting diodes directly irradiates a curved surface light-splitting sheet, the light-splitting sheet reflects the red dot into parallel light to enter human eyes, and meanwhile, an external scene target directly enters the human eyes through the light-splitting sheet, so that fusion of an external scene image and the red dot is realized on retina of the human eyes. However, the product has the following defects that firstly, a part of red dots can be emitted to the outdoor environment after passing through the curved surface light splitting sheet, so that the risk of exposing the red dots is increased; secondly, the external scene target can be refracted after passing through the curved surface reflector, at the moment, not parallel light enters human eyes, fusion is realized by adjusting the human eyes, when the human eyes shake, the imaging position of the external scene target and the position of a red dot deviate, parallax is easy to generate, and aiming accuracy is reduced.

The other is that red dots are placed in a turning light path, a light splitting sheet used for fusion is a flat sheet, the light path of an external scene target is not changed, and the generation of parallax is reduced, but the same type of products on the market are only fused by visible light and the red dots, and cannot be used at night and under the condition of insufficient light; or after near infrared or infrared is fused, the size and the volume are large, and the exposure risk and the load are increased.

In view of the above, the present utility model provides a fusion red dot sighting system, and fig. 1 to 3 are embodiments of the fusion red dot sighting system provided by the present utility model.

Referring to fig. 1 to 2, the fusion red point aiming system 100 includes an infrared lens assembly 1, a liquid crystal display 2, a prism 3, a first lens assembly 4, a reflecting mirror 5, a second lens assembly 6, a beam splitting sheet 7 and an eye point sequentially disposed along a light path direction, the prism 3 has an inclined plane facing the first lens assembly 4, and a red point light source a is disposed above the inclined plane, so that light of the red point light source a and infrared light of the infrared lens assembly 1 are transmitted to the beam splitting sheet 7 to enter a human eye after being fused on the prism 3, wherein an external view target penetrates through the beam splitting sheet 7 to enter the human eye.

In the technical scheme of the utility model, the infrared lens group 1 completes shooting of an external scene target, and finally, the infrared lens group can be displayed on the liquid crystal display 2, the image on the liquid crystal display 2 and the light emitted by the red point light source element a are subjected to light path fusion on the prism 3, at the moment, the fusion of infrared light and red point light is completed, the fused light passes through the first lens group 4 to complete first imaging, the volume is effectively shortened through light path turning of the reflecting mirror 5, and then the light passes through the second lens group 6 to reach the light splitting sheet 7, at the moment, the fusion light path of the infrared light and the red point light is turned on the light splitting sheet 7 to realize secondary imaging, and at the same time, the external scene target directly penetrates through the light splitting sheet 7 to enter human eyes, and the fusion of visible light, infrared light and red point light is completed. The advantages of the maximum effect are exerted, the use is free from barriers in day and night, the aiming precision is improved, and meanwhile, the design of a secondary imaging light path is adopted, so that the volume and the weight of the system are greatly reduced.

It can be understood that, in order to achieve multi-light fusion of the (near) infrared and the aimed red spot and the visible light, the light splitting sheet 7 is disposed between the eye spot and the second lens group 6, reflects the infrared and aimed red spot light into human eyes, and simultaneously allows the external visible light to directly transmit into human eyes, so that the multi-light fusion is achieved, and the light splitting sheet 7 does not generate any aberration and is only used for reflection and transmission.

Further, in the fusion red point aiming system 100, a distance from the vertex of the surface of the second lens group 6 to the eye point along the optical axis through the beam splitter 7 is an exit pupil distance, and the exit pupil distance is 87mm. The influence on eyes can be effectively reduced.

Further, the prism 3 is disposed opposite to the reflecting mirror 5, the reflecting mirror 5 is inclined toward the first lens group, and the light splitting sheet 7 is disposed opposite to the reflecting mirror 5. For example, the light path sequentially passes through the prism 3 and the reflecting mirror 5 along the first direction, and turns through the reflecting mirror 5 to be in the second direction and then enters the beam splitter 7, so that the whole space is reduced.

The present utility model is not limited to the inclination angle of each inclined lens, and the inclination angles of the prism 3, the reflecting mirror 5, and the spectroscopic plate 7 are preferably 45 °. In other embodiments, the angle of 30 degrees, 60 degrees and the like can be adopted, and the directions of the lens and the red point only need to be correspondingly adjusted.

The infrared lens group 1 completes shooting of an external scene target, specifically, the infrared lens group 1 includes a first lens 11, a second lens 12 and an infrared CMOS sensor which are sequentially arranged along the direction of a light path, and the infrared CMOS sensor displays an image on the liquid crystal display 2 through photoelectric conversion of light received by the first lens 11 and the second lens 12. The first lens 11 and the second lens 12 constitute an objective lens for taking an image not observable by human eyes, especially at night and in the case of insufficient light, to improve the perception of the user. The long-wave infrared objective lens can be composed of materials such as GE, chalcogenide and the like; or near infrared low-light-level low-illumination objective lens, FK series and LAK series high-dispersion materials are matched with ZLAF and ZF high-refractive index materials so as to correct aberration and realize clear imaging. Similarly, the infrared CMOS sensor may be a long-wave infrared or near-infrared low-illuminance CMOS, and the image is displayed on the liquid crystal display 2 by photoelectric conversion, in which case the capturing and displaying of the infrared image are realized.

Preferably, the liquid crystal display 2 is an oled display.

Further, the first lens group 4 includes a third lens 41, a fourth lens 42 and a fifth lens 43, wherein the third lens 41 and the fourth lens 42 are meniscus lenses protruding away from each other, and the fifth lens 43 is a biconvex lens. The third lens 41 and the fourth lens 42 are made of high-refractive-index low-dispersion glass, and lens parameters meet the conditions that Nd is more than 1.9 and less than 2.05, and Vd is more than 15 and less than 35; the double-meniscus symmetrical placement is adopted to effectively correct field curvature distortion and coma. The fifth lens 43 is made of biconvex large-dispersion glass, and the lens parameters are more than 1.75 and less than 1.9, and more than 30 and less than 50. The residual aberration of the previous lens is counteracted, so that one-time focusing imaging is realized.

Still further, the second lens group 6 includes a sixth lens 61, a seventh lens 62 and an eighth lens 63, the sixth lens 61 is a meniscus lens, and the seventh lens 62 and the eighth lens 63 are combined to form a cemented part. The lens parameters of the sixth lens 61 satisfy 1.7 < Nd < 1.85, 30 < Vd < 55. The spherical aberration astigmatism and field curvature of the imaging residue at one time can be effectively corrected, and the residual aberration such as distortion, chromatic aberration and the like brought about at the same time need a bonding member composed of the seventh lens 62 and the eighth lens 63 to cancel each other. The seventh lens 62 is made of ZF material, the lens parameter is 1.8 < Nd < 1.95, 15 < Vd < 30, the eighth lens 63 is made of LAK material, and the lens parameter is 1.65 < Nd < 1.75, 50 < Vd < 60. The whole system completes the optimization of aberration, and a good image quality effect is presented.

It should be understood that at this time, the distance from the vertex of the eighth lens 63 to the eye point along the optical axis through the beam splitter 7 is the exit pupil distance.

When the infrared lens group 1 is configured as a long-wave infrared objective lens and a corresponding CMOS sensor, in one embodiment, the corresponding lens parameters are designed as follows:

Table 1 shows the lens parameters of the long-wave infrared objective, i.e., the parameters of the first lens 11 and the second lens 12

Table 2 shows the aspherical and diffractive surface coefficients of each surface

The S2 plane is a diffraction plane with an aspheric surface as a substrate, and the diffraction plane coefficients are a2= -17.1972, a4= -13.3467, and a6=4.831.

When the infrared lens group 1 is arranged as a low-light (near infrared) objective lens and a corresponding CMOS sensor combination, in one embodiment, the infrared lens group 1 is provided with 6 lenses for the respective functions, see fig. 3, the corresponding lens parameters are designed as follows:

Table 3 shows lens parameters

Lens parameters from the OLED display screen to the eye point (diaphragm) are shown in the following table

It should be understood that in different embodiments, the infrared lens set 1 is disposed differently, and the designs of the liquid crystal display 2, the prism 3, the first lens set 4, the reflecting mirror 5, the second lens set 6, and the light splitting sheet 7 may be identical.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the specification and drawings of the present utility model or direct/indirect application in other related technical fields are included in the scope of the present utility model.

Claims (10)

1. The fusion red point aiming system is characterized by comprising an infrared lens group, a liquid crystal display screen, a prism, a first lens group, a reflecting mirror, a second lens group, a beam splitter and an eye point which are sequentially arranged along the light path direction, wherein the prism is provided with an inclined plane facing the first lens group, and a red point light source is arranged above the inclined plane, so that the light of the red point light source and the infrared light of the infrared lens group are transmitted to the beam splitter to enter the human eye after being subjected to light path fusion on the prism;

wherein, the external view object penetrates through the light splitting sheet and enters human eyes.

2. The fusion red spot aiming system of claim 1, wherein the distance from the vertex of the surface of the second lens group to the eyepoint along the optical axis through the beam splitter is an exit pupil distance, the exit pupil distance being 87mm.

3. The fusion red spot sighting system of claim 1, wherein the prism is disposed opposite the reflector, the reflector is tilted toward the first lens group, and the beam splitter is disposed opposite the reflector.

4. The fusion red spot sighting system of claim 3, wherein the prisms, the mirrors, and the beam splitter have an angle of inclination of 45 °.

5. The fusion red spot aiming system according to claim 1, wherein the infrared lens group comprises a first lens, a second lens and an infrared CMOS sensor which are sequentially arranged along the direction of the light path, and the infrared CMOS sensor displays the image on the liquid crystal display screen through photoelectric conversion of the light received through the first lens and the second lens.

6. The fusion red spot aiming system of claim 1, wherein the first lens group comprises a third lens, a fourth lens, and a fifth lens, the third lens and the fourth lens being meniscus lenses convex away from each other, the fifth lens being a biconvex lens.

7. The fused red dot sighting system of claim 6, wherein the lens parameters of the third lens and the fourth lens satisfy 1.9 < Nd < 2.05, 15 < Vd < 35;

The lens parameters of the fifth lens meet Nd < 1.75 and Nd < 1.9, and Vd < 30 and Vd < 50.

8. The fusion red spot aiming system of claim 1, wherein the second lens group comprises a sixth lens, a seventh lens, and an eighth lens, the sixth lens being a meniscus lens, the seventh lens and the eighth lens combining to form a cemented piece.

9. The fusion red spot sighting system of claim 8, wherein the lens parameter of the sixth lens satisfies 1.7 < Nd < 1.85, 30 < Vd < 55.

10. The fusion red spot sighting system of claim 8, wherein the seventh lens is of ZF material and the lens parameter satisfies 1.8 < Nd < 1.95, 15 < Vd < 30;

The eighth lens is made of LAK material, and the lens parameters are more than 1.65 and less than 1.75, and more than 50 and less than 60.