Holographic sighting telescope and holographic sighting equipment

Abstract

The utility model discloses a holographic sighting telescope and holographic sighting equipment, the holographic sighting telescope comprises a shell, a light guide lens, a light source and a beam expanding structure, and the shell is provided with a sighting window; the light guide lens is arranged in the shell; a coupling-in grating and a coupling-out grating are arranged at intervals along the height direction of the light guide lens; the light emitting direction of the coupled-out grating directly faces the aiming window; the light source is arranged in the shell; the beam expanding structure is arranged on a light emitting path of the light source and is used for reflecting a light beam emitted by the light source to the coupling-in grating; the coupling-in grating is used for collimating the light beam and coupling the light beam into the light guide lens. Light beams are collimated through a planar micro-nano element which is coupled into the grating, a large-size concave mirror is replaced, the structural layout of a beam expanding structure and a light source is more flexible, and the size of the holographic sighting telescope can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of optical aiming equipment technology, and in particular to a holographic aiming scope and a holographic aiming device. Background Technology

[0002] A holographic sight is an advanced optical aiming device designed based on holographic imaging technology. Its core principle is to record and reproduce the light wave information of the reticle using laser holography, forming a virtual image of the reticle at infinity. This virtual image enters the eye as parallel light, and the eye observes this virtual image through the aiming lens, thus achieving aiming at the object. Based on this principle, existing holographic sights typically require optical elements such as mirrors and concave mirrors between the light source and the reticle, and sufficient spatial distance is needed to complete beam expansion and collimation of the light source.

[0003] For example, prior art patent application number 202410022734.3 discloses "a holographic sight based on optical waveguide technology and its manufacturing method," which discloses that a laser diode and a collimating mirror are respectively arranged on both sides of a transparent substrate. The collimating mirror is arc-shaped, and the beam is collimated to the surface of the volumetric holographic grating through the collimating mirror. However, in order to meet the requirements of the spot size during operation, a relatively long horizontal distance needs to be maintained between the collimating mirror and the light source so that the beam emitted from the light source has a sufficiently long beam-expanding optical path before being reflected onto the transparent substrate by the concave mirror. This solution places the light source and the concave mirror on opposite sides of the optical waveguide, which is beneficial for reducing the horizontal size, but the display brightness will be significantly reduced, which violates the original design intention. Therefore, the existing holographic sights lack flexibility in optical path design, resulting in large size and difficulty in assembly and transportation.

[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a holographic sight and a holographic aiming device, which aims to solve the problems of insufficient optical path design and large product size in existing holographic aiming devices.

[0006] The technical solution of this utility model is as follows:

[0007] A holographic sight, comprising:

[0008] A housing, wherein a aiming window is provided;

[0009] A light guide lens is disposed inside the housing; a coupling grating and a coupling grating are provided at intervals along the height direction of the light guide lens; the light emission direction of the coupling grating is directly opposite the aiming window;

[0010] The light source is located inside the housing;

[0011] A beam expander structure is disposed in the light output path of the light source and is used to reflect the light beam emitted by the light source onto the coupling grating; the coupling grating is used to collimate the light beam and couple the light beam to the light guide lens.

[0012] The holographic sight, wherein the beam expander structure includes a first reflector and a second reflector, both of which are disposed within the housing;

[0013] The first reflector is disposed opposite to the light source, and the line connecting the first reflector and the light source is a first direction; the second reflector is disposed opposite to the coupling grating, and the line connecting the second reflector and the coupling grating is a second direction; the second direction intersects the first direction.

[0014] The holographic sight, wherein both the first reflector and the second reflector are planar reflectors.

[0015] In the aforementioned holographic sight, the light source is a laser diode or a light-emitting diode.

[0016] In the holographic sight, the light source, the first reflector, the second reflector, and the coupling grating are all located on the same side of the light guide lens.

[0017] The holographic sight includes a reticle image, the reticle image information being recorded on the coupling grating; or, the reticle image is emitted by a light source.

[0018] The holographic sight described above, wherein the light guide lens is a transparent glass sheet.

[0019] The holographic sight, wherein the thickness of the light guide lens is 1-10 mm.

[0020] The holographic sight includes a power supply and a control board, both of which are housed within the housing; the control board is electrically connected to both the power supply and the light source.

[0021] This application also discloses a holographic aiming device, which includes a holographic aiming scope as described in any of the above.

[0022] Compared with the prior art, the embodiments of this utility model have the following advantages:

[0023] The holographic sight disclosed in this utility model emits a light beam from a light source. After the beam is expanded by a beam-expanding structure to increase the optical path and make the spot size meet the working requirements, it illuminates the coupling grating. The light is collimated into parallel light in the coupling grating and then enters the light guide lens. After the parallel light undergoes one reflection in the light guide lens, it is coupled out through the coupling grating and displayed as a reticle image at infinity. The aiming window is opposite to the coupling grating to achieve the effect of aiming through the aiming window.

[0024] As can be seen, by coupling the collimated beam with an grating, the optical path structure is simplified in this invention. There is no need to set a concave reflector in the housing, which makes the optical structure of the holographic sight simpler, the optical path design more flexible, and reduces the space occupied by the optical structure, which is conducive to reducing the size of the holographic sight. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the holographic sight in this utility model.

[0027] Among them, 10 is the housing; 11 is the aiming window; 20 is the light guide lens; 21 is the coupling grating; 22 is the coupling grating; 30 is the light source; 40 is the beam expander structure; 41 is the first reflector; and 42 is the second reflector. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0030] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0031] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0032] For ease of description, spatial relational terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relational terms are intended to encompass not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways, and the spatial relational terms used herein will be interpreted accordingly.

[0033] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0034] See Figure 1 In one embodiment of this utility model application, a holographic sight is disclosed, comprising a housing 10, a light guide lens 20, a light source 30, and a beam expander 40. The housing 10 is provided with a aiming window 11; the light guide lens 20 is disposed inside the housing 10; a coupling grating 21 and a coupling grating 22 are spaced apart along the height direction of the light guide lens 20; the light emission direction of the coupling grating 22 is directly opposite to the aiming window 11; the light source 30 is disposed inside the housing 10; the beam expander 40 is disposed in the light emission path of the light source 30, and is used to reflect the light beam emitted by the light source 30 onto the coupling grating 21; the coupling grating 21 is used to collimate the light beam and couple the light beam to the light guide lens 20.

[0035] The holographic sight disclosed in this embodiment emits a light beam from the light source 30. After the beam is expanded by the beam expander 40 to increase the optical path and the spot size meets the working requirements, it illuminates the coupling grating 21. In the coupling grating 21, the dispersed light is collimated into parallel light and then enters the light guide lens 20. After the parallel light undergoes one reflection in the light guide lens 20, it is coupled out by the coupling grating 22 and displayed as a reticle image at infinity. The aiming window 11 is opposite to the coupling grating 22 to achieve the effect of aiming through the aiming window 11.

[0036] As can be seen, in this embodiment, the optical path structure is simplified by using the collimating grating 21 to couple the beam, eliminating the need for a concave reflector in the housing 10. This makes the optical structure of the holographic sight simpler, the optical path design more flexible, and reduces the space occupied by the optical structure, which is beneficial to reducing the size of the holographic sight.

[0037] In a holographic sight, a parallel light of a certain size is needed to illuminate the hologram containing the reticle image for observation and aiming. However, due to the size requirements of the holographic sight, the size of the available light source 30 is small, and the emitted scattered light needs to be expanded to increase the size of the spot. At the same time, the scattered light needs to be converted into parallel light to meet the usage requirements.

[0038] For example Figure 1 As shown, in another embodiment of this application, the beam expander structure 40 includes a first reflecting mirror 41 and a second reflecting mirror 42, both of which are disposed within the housing 10. In this embodiment, natural beam expansion is achieved through the two reflecting mirrors. By increasing the optical path, the diameter of the beam emitted from the light source 30 is increased, thus meeting the imaging requirements.

[0039] Specifically, the first reflector 41 is disposed opposite to the light source 30, and the line connecting the first reflector 41 and the light source 30 is a first direction; the second reflector 42 is disposed opposite to the coupling grating 21, and the line connecting the second reflector 42 and the coupling grating 21 is a second direction; the second direction intersects the first direction.

[0040] Preferably, in this embodiment, the light guide lens 20 is vertically arranged, and the coupling grating 21 and the coupling grating 22 are arranged one above the other on the surface of the light guide lens 20. Simultaneously, the beam expander 40 and the light source 30 are located below the horizontal height of the coupling grating 22 to ensure that there is no obstruction between the human eye and the target object. At this time, the light source 30, the first reflector 41, the second reflector 42, and the coupling grating 21 are arranged in a perimeter pattern. The first reflector 41 faces the light source 30, and the coupling grating 21 faces the second reflector 42. The second reflector 42 is located in the light-emitting direction of the first reflector 41. Light is emitted from the light source 30 within the space enclosed by the four components, undergoes multiple reflections, passes sequentially through the first reflector 41 and the second reflector 42, and reaches the coupling grating 21, completing the beam expansion. The position and angle of the first reflector 41 and the second reflector 42 can be flexibly adjusted according to the light emission angle and divergence angle of the light source 30, so that the light ultimately enters the coupling grating 21. The number of mirrors can be increased within the beam-expanding space, thereby increasing the number of reflections and extending the optical path length without increasing the overall system size. Considering cost and installation difficulty, two mirrors are preferred.

[0041] In this embodiment, the light source 30 is disposed on one side of the light guide lens 20, and the light emitting aperture of the light source 30 emits light upward, so that it directly hits the first reflecting mirror 41, and then reflects it onto the second reflecting mirror 42, which guides it to the coupling grating 21. In the beam expanding optical path, the arrangement of the light source 30, the first reflecting mirror 41, the second reflecting mirror 42 and the coupling grating 21 is concentrated, which can be flexibly arranged in three-dimensional space, thereby reducing the space occupied.

[0042] Specifically, as another embodiment of this application, both the first reflector 41 and the second reflector 42 are disclosed as planar reflectors. This embodiment uses simple-to-manufacture planar reflectors, which can naturally reflect light, allowing the beam emitted from the light source 30 to be naturally expanded without excessive modulation. This simplifies the beam-expanding structure 40 and helps reduce the difficulty of optical path design.

[0043] Specifically, as another embodiment of this application, the light source 30 is disclosed as a laser diode or a light-emitting diode. Using a high-brightness, durable laser diode or light-emitting diode can extend the service life of the holographic sight and improve product stability, making it easier to adapt to complex outdoor environments.

[0044] Specifically, in another embodiment of this application, the light source 30, the first reflector 41, the second reflector 42, and the coupling grating 21 are all located on the same side of the light guide lens 20. In this embodiment, the light emitted from the light source 30 enters the coupling grating 21 after two reflections, and there is no obstruction during propagation, resulting in high propagation efficiency, less interference, and less light brightness loss. Furthermore, placing the light source 30, the first reflector 41, the second reflector 42, and the coupling grating 21 on the same side of the light guide lens 20 facilitates the assembly and calibration of the optical path.

[0045] Specifically, as another embodiment of this application, the holographic sight is disclosed to include a reticle image, which is recorded on the coupling grating 22 using holographic technology; or, the reticle image is directly emitted by the light source 30. When the reticle image is located on the coupling grating 22, the coupling grating 22 has the function of detaching light rays and displaying the reticle image. When the reticle image is directly emitted by the light source 30, the coupling grating 22 only has the function of detaching light rays; both methods allow the human eye to see the reticle image.

[0046] Specifically, as another embodiment of this application, the thickness of the light guide lens 20 is disclosed to be 1-10 mm. The light guide lens 20 disclosed in this embodiment is used to reflect light beams, and is a transparent glass sheet to ensure a clear aiming field of view.

[0047] In this embodiment, the coupling grating 21, the light guide lens 20, and the output grating 22 are integrated as a whole and work together. Besides collimation, the coupling grating 21 deflects light at a specific angle into the light guide lens. This angle is greater than the total internal reflection angle, causing all light to be reflected within the light guide lens 20 without transmission, thus improving light energy utilization efficiency. After one reflection within the light guide lens 20, the light illuminates the output grating 22 and is coupled out, displaying a reticle image at infinity. The characteristic of the coupling grating 21 to deflect light at a designed angle allows for more flexible optical path design, shortens the propagation path, and makes the overall structure more compact. Based on the coupling angle of the light and the distance between the coupling grating 21 and the output grating 22, the required thickness of the light guide lens 20 can be calculated. In this embodiment, depending on the grating performance and product design requirements, a light guide lens 20 with a thickness within 1-10 mm can be used. It should be noted that the thickness of the light guide lens 20 can be any value between 1 and 10 mm or any two values, such as 1 mm, 3 mm, 5 mm, 7 mm, 9 mm, 10 mm, etc.

[0048] Specifically, as another embodiment of this application, the holographic sight is disclosed to include a power supply and a control board, both of which are housed within the housing 10; the control board is electrically connected to both the power supply and the light source 30. The power supply disclosed in this embodiment can be a battery, providing electrical energy. The control board controls the circuit's on / off state, enabling the light source 30 to emit light or be turned off, thus allowing the holographic sight to switch states. The light source 30 is turned on during use and turned off when idle, saving energy and extending its service life.

[0049] As another embodiment of this application, a holographic aiming device is disclosed, which includes a holographic aiming scope as described in any of the above.

[0050] In summary, this application discloses a holographic sight, comprising a housing 10, a light guide lens 20, a light source 30, and a beam expander 40. The housing 10 has an aiming window 11. The light guide lens 20 is disposed within the housing 10. An insertion grating 21 and an output grating 22 are spaced apart along the height of the light guide lens 20. The output direction of the output grating 22 faces the aiming window 11. The light source 30 is disposed within the housing 10. The beam expander 40 is disposed in the light path of the light source 30, used to reflect the light beam emitted from the light source 30 onto the insertion grating 21. The insertion grating 21 is used to collimate the light beam and couple the light beam to the light guide lens 20. In this embodiment, the insertion grating 21 collimates the light beam, simplifying the optical path structure and eliminating the need for a concave reflector in the housing 10, thus simplifying the optical structure of the holographic sight. By cooperating with the input grating 21, the light guide lens 20, and the output grating 22, the optical path design becomes more flexible, reducing the space occupied by the optical structure and thus helping to reduce the size of the holographic sight.

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0052] It should be noted that this utility model uses a holographic sight and a holographic aiming device as examples to introduce the specific structure and working principle of this utility model. However, the application of this utility model is not limited to holographic sights and holographic aiming devices, and can also be applied to the production and use of other similar workpieces.

[0053] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A holographic riflescope, comprising: include: A housing, wherein a aiming window is provided; A light guide lens is disposed inside the housing; a coupling grating and a coupling grating are provided at intervals along the height direction of the light guide lens; the light emission direction of the coupling grating is directly opposite the aiming window; The light source is located inside the housing; A beam expander structure is disposed in the light output path of the light source and is used to reflect the light beam emitted by the light source onto the coupling grating; the coupling grating is used to collimate the light beam and couple the light beam to the light guide lens.

2. The holographic riflescope of claim 1, wherein, The beam expander structure includes a first reflector and a second reflector, both of which are disposed within the housing; The first reflector is disposed opposite to the light source, and the line connecting the first reflector and the light source is a first direction; the second reflector is disposed opposite to the coupling grating, and the line connecting the second reflector and the coupling grating is a second direction; the second direction intersects the first direction.

3. The holographic riflescope of claim 2, wherein, Both the first and second reflectors are plane reflectors.

4. The holographic riflescope of claim 3, wherein, The light source is a laser diode or a light-emitting diode.

5. The holographic riflescope of claim 2, wherein, The light source, the first reflector, the second reflector, and the coupling grating are all located on the same side of the light guide lens.

6. The holographic riflescope of claim 1, wherein, The holographic sight includes a reticle image, the reticle image information of which is recorded on the coupled grating; or, the reticle image is emitted by a light source.

7. The holographic riflescope of claim 1, wherein, The light guide lens is a transparent glass sheet.

8. The holographic riflescope of claim 1, wherein, The thickness of the light guide lens is 1-10 mm.

9. The holographic riflescope of claim 1, wherein, The holographic sight includes a power supply and a control board, both of which are housed within the housing; the control board is electrically connected to both the power supply and the light source.

10. A holographic sighting device characterized by Including the holographic sight as described in any one of claims 1 to 9.

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