WO2024055138A1

WO2024055138A1 - Combined sighting system and sight imaging system thereof

Info

Publication number: WO2024055138A1
Application number: PCT/CN2022/118295
Authority: WO
Inventors: 黄文博; 凃劲超
Original assignee: 合肥英睿系统技术有限公司
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2024-03-21

Abstract

A combined sighting system and a sight imaging system thereof. The sight imaging system comprises an infrared light assembly (10), a sighting mark assembly (20), and an optical waveguide assembly (30). The infrared light assembly (10) comprises a display module (14) arranged on an infrared image imaging path (L1), and is used for acquiring an infrared light signal within a target field of view and forming an infrared image according to the infrared light signal for display in the display module (14). The sighting mark assembly (20) is used for emitting a sighting mark light signal, wherein the sighting mark light signal and the light signal of the infrared image displayed in the display module (14) are commonly transmitted along the infrared image imaging path (L1). The optical waveguide assembly (30) comprises a light coupling-in region (33) located on the infrared image imaging path (L1) and a light coupling-out region (34) located on a visible light image imaging path (L3). The sighting mark light signal, and/or the infrared image (which is in the form of a light signal) displayed in the display module (14) are/is incident into the light coupling-in region (33), transmitted to the light coupling-out region (34) via the optical waveguide assembly (30), and fused with a visible light signal in the light coupling-out region (34); and the light coupling-out region (34) corresponds to an observation position (40).

Description

Combined sighting system and its sight imaging system

Technical field

The present invention relates to the field of image processing technology, and in particular to a combined sighting system and its sight imaging system.

Background technique

At present, red dot sights are widely used in optical sighting equipment, such as shotguns. Compared with traditional mechanical sights, red dot sights have faster response times, are more convenient to operate, require less learning costs, and can operate in any light. It has the advantages of accurate shooting under certain conditions. The optical sighting equipment is paired with a red dot sight attachment, which allows users to use it during the day or night. The infrared system and the visible light system complement each other and can highlight the outline characteristics of the target object. Helps improve user experience.

However, the optical system of the currently known red dot sight includes a complex image rotation system composed of multiple reflectors, etc., resulting in a large volume and weight, which will cause a certain degree of burden when the user holds it for aiming for a long time; And due to the limitation of the reflector area, the field of view of the scope is small, making it impossible to observe a larger range of scenes; and because the optical system of the scope only has a fixed-size exit pupil, the human eye can only be placed exactly on the exit pupil. Only when the entire field of view can be fully seen, the human eye will not observe the complete field of view of the lens at any position except the exit pupil, that is, the eye movement range is small. This characteristic greatly limits the user experience, because in During the shooting process, the relative position of the human eye and the scope changes due to the vibration of the firearm. After each shot, the human eye needs to be repositioned on the exit pupil of the scope, which affects the shooting efficiency; and the red dot sight has a thick metal shell. , is heavy and will block the human eye’s intuitive field of vision, affecting the shooting experience.

technical problem

In order to solve existing technical problems, embodiments of the present invention provide a lightweight, multi-light fusion sight imaging system that supports multi-dimensional exit pupil observation, and a combined sighting system having the sight imaging system.

Technical solutions

A first aspect of the embodiment of the present invention provides a scope imaging system, including an infrared light component, an aiming mark component and an optical waveguide component;

The infrared light component includes a display module disposed on the infrared image imaging path. The infrared light component is used to obtain infrared light signals within the target field of view, and form an infrared image based on the infrared light signal for display in the display module. ;

The aiming mark assembly is used to emit an aiming mark optical signal. The aiming mark optical signal and the optical signal of the infrared image displayed in the display module are transmitted to the optical waveguide assembly along the infrared image imaging path through a common optical path. ;

The optical waveguide component includes a light coupling area located on the infrared image imaging path and a light coupling out area located on the visible light image imaging path. The light coupling area corresponds to the display module. The aiming mark light The signal and/or the infrared image displayed in the display module is incident on the optical coupling area in the form of an optical signal, and is transmitted to the optical coupling area through the optical waveguide component. In the optical coupling area It is merged with the visible light signal transmitted along the visible light image imaging path, and is coupled out to the observation position by the light coupling area.

Wherein, the infrared light component further includes a dichroic prism component located between the display module and the light coupling area of the optical waveguide component; the dichroic prism component is provided with an inclined light splitting surface, and the display The module and the aiming mark assembly are respectively located on opposite sides of the light splitting surface, and the transmission light path of the aiming mark optical signal is adjusted through the light splitting surface so that the aiming mark optical signal and the optical signal of the infrared image are along the same line. The infrared image imaging paths are transmitted through a common optical path.

Wherein, the side of the light splitting surface facing the display module is provided with a light-transmitting film, and the side facing the aiming mark assembly is provided with a reflective film; the infrared image displayed in the display module is in the form of a light signal The aiming mark optical signal emitted by the aiming mark assembly is incident on the light-transmitting film and transmitted through the reflective film, and the aiming mark optical signal is reflected along the infrared image by the reflective film. The imaging path is transmitted by a common optical path.

Wherein, the optical waveguide assembly further includes an optical waveguide eyepiece located between the dichroic prism assembly and the light coupling area of the optical waveguide assembly; the aiming mark optical signal is reflected by the dichroic prism assembly and then The optical signals of the infrared image transmitted through the dichroic prism assembly are fused together, are incident on the optical waveguide eyepiece along the infrared image imaging path, and are converted into parallel light through the optical waveguide eyepiece and emitted to the optical coupling area.

Wherein, the incident direction of the aiming mark light signal incident on the light splitting surface from the aiming mark assembly and the incident direction of the light signal of the infrared image in the display module incident on the light splitting surface are mutually perpendicular; The aiming mark assembly includes a red point light source that emits a red point light signal toward the light splitting surface, and after reflection by the light splitting surface, moves toward the light along the infrared image imaging path perpendicular to the original propagation direction. Coupling area exit.

Wherein, the infrared light component further includes an infrared objective lens, an infrared sensor and an infrared image processor. The infrared objective lens, the infrared sensor, the infrared image processor, the display module and the dichroic prism assembly are along the The infrared image imaging paths are arranged in sequence; the infrared objective lens is used to receive infrared light signals within the target field of view; the infrared sensor receives the infrared light signals collected by the infrared objective lens and converts them into electrical signals; the infrared image processing The electrical signal is processed by a device, and the infrared image formed by the processed electrical signal is displayed by the display module.

Wherein, the infrared light component further includes a lens barrel, and the infrared objective lens, the infrared sensor, the infrared image processor, the display module and the spectroscopic prism assembly are all housed in the lens barrel; The infrared objective lens is provided at the light entrance at the front end of the lens barrel; the aiming mark component is disposed on the inner wall of the lens barrel and is aligned with the position of the dichroic prism component.

Wherein, the optical waveguide component further includes an optical waveguide substrate, a first diffractive optical element and a second diffractive optical element provided on the optical waveguide substrate, and the light coupling-in area and the light-coupling area are respectively located at At the opposite ends of the optical waveguide substrate, the first diffractive optical element is located on the side of the light coupling area away from the incident direction of the light signal of the infrared image, and the second diffractive optical element is located on the light coupling out. The area is close to the side of the visible light signal incident direction.

Wherein, the first diffractive optical element and the second diffractive optical element are both holographic grating elements or relief grating elements.

Wherein, the optical waveguide component further includes an optical waveguide base and a mirror array located in the optical waveguide base, and the light coupling-in area and the light-coupling area are respectively located at opposite ends of the optical waveguide base, so The light coupling area is provided with an inclined reflective surface on a side away from the incident direction of the light signal of the infrared image, and the mirror array includes a plurality of beam splitters arranged at intervals in the light coupling area.

In a second aspect, a combined sighting system is also provided, including an optical sighting device and the sight imaging system described in any embodiment of the present application.

Wherein, the optical sighting equipment is one of the following: shotgun, telescope, infrared thermal imaging camera.

beneficial effects

The scope imaging system provided in the above embodiment includes an infrared light component, a visible light component, an aiming mark component and an optical waveguide component. The optical signal of the infrared image and the aiming mark optical signal are incident on the light coupling area of the optical waveguide component, and pass through the light The waveguide component fuses the optical signal of the infrared image and the aiming mark optical signal and conducts them to the optical coupling area. The optical coupling area is located on the visible light image imaging path. The optical signal of the infrared image and the aiming mark optical signal are in the optical coupling area and The transmitted visible light signals are fused and emitted to the rear observation position. By using optical waveguide transmission to replace the traditional complex mirror image transfer system, multi-channel optical signal fusion of infrared light, visible light and aiming mark light can be realized, which can be greatly simplified. The structure of the scope imaging system achieves the purpose of overall lightweight; the optical waveguide component can receive optical signals through a larger optical coupling area, thereby receiving a larger scene field of view; the optical waveguide component has a multi-dimensional pupil expansion function. Users can see the complete fusion image in different directions of the observation position, allowing users to see the complete scope field of view in a larger range and achieve multi-dimensional exit pupil observation purposes.

In the above embodiments, the combined sighting system including the sight imaging system belongs to the same concept as the corresponding sight imaging system embodiment, and thus has the same technical effect as the corresponding sight imaging system embodiment, which will not be discussed here. Repeat.

Description of drawings

Figure 1 is a schematic structural diagram of a scope imaging system in an embodiment;

Figure 2 is a schematic diagram of the optical path of the sight imaging system shown in Figure 1;

Figure 3 is a schematic structural diagram of an optical waveguide component in an embodiment;

Figure 4 is a schematic structural diagram of an optical waveguide component in another embodiment;

Figure 5 is a schematic structural diagram of an optical waveguide component in yet another embodiment.

Explanation of reference signs

Infrared light component 10, infrared objective lens 11, lens barrel 12, infrared signal processing module 13, display module 14, dichroic prism component 15, light splitting surface 151, aiming mark component 20, optical waveguide component 30, optical waveguide eyepiece 31, optical coupling Area 33, optical waveguide substrate 32, optical reflection plane 321, light coupling area 34, first optical diffraction element 351, second optical diffraction element 352, tilted mirror 36, beam splitter 37, observation position 40, housing 50, Infrared image imaging path L1, original propagation direction of aiming mark light signal L21, propagation direction after reflection of aiming mark light signal L22, visible light image imaging path L3

Embodiments of the invention

The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments of the description.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terminology used herein in the description of the present invention is for the purpose of describing specific embodiments only and is not intended to limit the scope of the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply. The devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation and therefore are not to be construed as limitations of the invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be directly connected, or indirectly connected through an intermediary, or it can be internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Please refer to Figure 1, which is a schematic diagram of a scope imaging system provided by an embodiment of the present application, including an infrared light component 10, an aiming mark component 20 and an optical waveguide component 30; the infrared light component 10 includes an infrared image imaging path L1 On the display module 14, the infrared light component 10 is used to obtain the infrared light signal within the target field of view, and form an infrared image according to the infrared light signal for display in the display module 14; the aiming mark component 20 is used to The aiming mark light signal is emitted, and the aiming mark light signal and the light signal of the infrared image displayed in the display module 14 are transmitted along the infrared image imaging path L1 along the same optical path. The optical waveguide component 30; the optical waveguide component 30 includes a light coupling-in area 33 located on the infrared image imaging path L1 and a light-coupling area 34 located on the visible light image imaging path L3. The light coupling-in area 33 Corresponding to the display module 14 , the aiming mark optical signal and/or the infrared image displayed in the display module 14 is incident on the light coupling area 33 in the form of an optical signal, and passes through the optical waveguide assembly 30 It is transmitted to the optical coupling area 34 , where it is merged with the visible light signal transmitted along the visible light image imaging path L3 , and is coupled out to the observation position 40 by the optical coupling area 34 .

The scope imaging system provided in the above embodiment uses an optical waveguide to transmit the infrared image and the aiming mark optical signal, so as to change the transmission direction of the infrared image optical signal and the aiming mark optical signal until they coincide with the visible light image imaging path L3. Emitting towards the observation position 40, the traditional complex mirror imaging system is replaced by an optical waveguide to achieve multi-channel optical signal fusion of infrared light, visible light and aiming mark light, which can greatly simplify the structure of the sight imaging system and achieve an overall lightweight Purpose; The optical waveguide component 30 can receive optical signals through a larger light coupling area 33, thereby receiving a larger scene field of view; the optical waveguide component 30 has a multi-dimensional pupil expansion function, and the user can observe the position 40 in different directions Everyone can see the complete fusion image, allowing users to see the complete scope field of view in a larger range, achieving multi-dimensional exit pupil observation purposes.

Please refer to Figure 2, which is a schematic diagram of the optical path principle of the sight imaging system. The incident direction and transmission direction of the visible light signal are aligned with the observation position 40. That is, the visible light image imaging path L3 and the observation position 40 are located on the same straight line. The infrared image imaging path L1 and the visible light image imaging path L3 are parallel to each other. The optical waveguide component 30 is arranged vertically relative to the visible light image imaging path L3 and the infrared image imaging path L1. The light coupling area 33 of the optical waveguide component 30 is located in the infrared image imaging path. At the rear end of L1, the light coupling area 34 is provided at the rear end of the visible light image imaging path L3. The original propagation direction L21 of the aiming mark optical signal is perpendicular to the infrared image imaging path L1. After being turned, it is merged with the optical signal of the infrared image displayed in the display module 14, and is transmitted along the same optical path as the optical signal of the infrared image along the infrared image imaging path L1. And jointly emit to the light coupling area 33 located at the rear end of the infrared image imaging path L1, enter the optical waveguide component 30 through the light coupling area 33, and pass through multiple total reflections in the optical waveguide component 30 to the light coupling out area. 34, thereby merging with the visible light signal transmitted through the optical coupling area 34 along the visible light image imaging path L3. In this way, by utilizing the characteristics of the optical waveguide assembly 30 to guide light waves to propagate inside the optical waveguide assembly 30 , the transmission optical paths of the infrared image optical signal, the aiming mark optical signal and the visible light signal are finally converged and then emitted together toward the observation position 40 .

In some embodiments, the infrared light component 10 includes a dichroic prism component 15 located between the display module 14 and the light coupling area 33 of the optical waveguide component 30; the dichroic prism component 15 has a built-in There is an inclined light splitting surface 151. The display module 14 and the aiming mark assembly 20 are respectively located on opposite sides of the light splitting surface 151. The transmission optical path of the aiming mark optical signal is adjusted through the light splitting surface 151, so that the The aiming mark optical signal and the infrared image optical signal are transmitted along a common optical path along the infrared image imaging path L1. Among them, the dichroic prism assembly 15 is configured to allow light of different spectra to be transmitted or reflected when passing through, so as to adjust the transmission optical path of the aiming mark light signal, so that the aiming mark emitted along the original propagation direction L21 perpendicular to the infrared image imaging path L1 The marking light signal, after being adjusted by the light splitting surface 151, forms the aiming mark light signal in the reflected propagation direction L22, which is transmitted along the same optical path as the infrared image along the infrared image imaging path L1, which is equivalent to the aiming mark of the aiming mark light signal. The imaging is superimposed on the infrared image displayed in the display module 14 .

Optionally, the side of the light splitting surface 151 facing the display module 14 is provided with a light-transmitting film, and the side facing the aiming mark assembly 20 is provided with a reflective film; The infrared image is incident on the light-transmitting film in the form of a light signal and is transmitted through. The aiming mark optical signal emitted by the aiming mark assembly 20 is incident on the reflective film, and the aiming mark optical signal is transmitted through the reflective film. The reflection is transmitted along the common optical path of the infrared image imaging path L1. The light splitting prism assembly 15 transmits the light signal of the infrared image of the infrared assembly and reflects the light signal of the aiming mark of the aiming mark assembly 20, so that the light signal of the infrared image and the light signal of the aiming mark pass through the spectrophotometer. The prism assembly 15 is then fused in the infrared light channel. The light-splitting prism assembly 15 is rectangular as a whole and includes a light-incident surface facing the display module 14 and a light-emitting surface facing the light waveguide assembly 30. The light-splitting surface 151 is obliquely connected between the light-incident surface and the light-emitting surface, wherein the light-splitting surface 151 The projection on the light incident surface is greater than or equal to the projection of the display module 14 on the light incident surface. In this embodiment, the size of the light incident surface is larger than the size of the display module 14 , the first intersection position of the light splitting surface 151 and the light incident surface is flush with the bottom surface of the display module 14 , and the second intersection position of the light splitting surface 151 and the light exit surface is flush with the bottom surface of the display module 14 . The top surface of the display module 14 is flush, so that a first distance is formed between the first intersection position and the bottom surface of the dichroic prism assembly 15, and a second distance is formed between the second intersection position and the top surface of the dichroic prism assembly 15, so that The emission range of the optical signal of the infrared image displayed in the display module 14 is within the light transmission adjustment range of the light-transmitting film of the light-splitting surface 151 , and can increase the mechanical stress of the light-splitting prism assembly 15 .

Among them, the light-transmitting film and the reflective film can respectively utilize the different spectral ranges of different lights to achieve the transmission and reflection functions of the corresponding light. In an optional example, the spectral range of visible light is A, the spectral range of infrared light is B, the spectral range of the aiming mark light signal is C, and the light-transmitting film has high transmittance for the light in the spectral range B, and Light outside the spectral range B has high reflectivity; the reflective film achieves high reflectivity for light in the spectral range C and high transmittance for light in the spectral range B.

Optionally, the incident direction of the aiming mark optical signal from the aiming mark assembly 20 to the light splitting surface 151 is the same as the incidence direction of the infrared image in the display module 14 to the light splitting surface 151 . The directions are perpendicular to each other; the aiming mark assembly 20 includes a red point light source, which emits a red point light signal toward the light splitting surface 151, and is reflected by the light splitting surface 151 along a direction perpendicular to the original propagation direction L21. The infrared image imaging path L1 (L22) emits towards the light coupling area 33. Specifically, the display module 14 is located on one side of the light incident surface of the dichroic prism assembly 15 , the aiming mark assembly 20 is located on one side of the bottom surface of the dichroic prism assembly 15 , and the aiming mark light signal is incident on the dichroic surface 151 through the dichroic prism assembly 15 on the reflective film, and merged with the light signal of the infrared image transmitted through the light splitting surface 151, thereby superimposing the image of the red light point into the infrared image.

Wherein, the optical waveguide assembly 30 further includes an optical waveguide eyepiece 31 located between the dichroic prism assembly 15 and the light coupling area 33 of the optical waveguide assembly 30; the aiming mark optical signal passes through the dichroic prism assembly 15 and the light coupling area 33 of the optical waveguide assembly 30. After reflection by the prism component 15, it is merged with the light signal of the infrared image transmitted through the dichroic prism component 15, and is incident together to the optical waveguide eyepiece 31 along the infrared image imaging path L1, and is converted by the optical waveguide eyepiece 31 The parallel light is emitted to the light coupling area 33 . The aiming mark assembly 20 is a point light source. The aiming mark light signal is emitted to the reflective film on the light splitting surface 151 in the form of divergent light. After reflection, it is still emitted from the light exit surface in the form of divergent light; the infrared image in the display module 14 is also in the form of divergent light. The divergent light is emitted to the light-transmitting film on the light splitting surface 151, and after being transmitted, it is still emitted from the light-emitting surface in the form of divergent light in the original propagation direction L21. The light exit surfaces of the optical waveguide eyepiece 31 and the dichroic prism assembly 15 are parallel to each other. The light emitted from the light exit surface of the dichroic prism assembly 15 is collimated, and the light passing through the optical waveguide eyepiece 31 is emitted into the optical waveguide as parallel light.

In some embodiments, the infrared light component 10 further includes an infrared objective lens 11, an infrared sensor and an infrared image processor. The infrared objective lens 11, the infrared sensor, the infrared image processor, the display module 14 and The dichroic prism components 15 are arranged sequentially along the infrared image imaging path L1; the infrared objective lens 11 is used to receive infrared light signals within the target field of view; the infrared sensor receives the infrared light collected by the infrared objective lens 11. The optical signal is converted into an electrical signal; the infrared image processor processes the electrical signal, and the display module 14 displays the infrared image formed by the processed electrical signal. Among them, the infrared objective lens 11 filters the light in the target field of view, allowing only infrared light signals to pass through. The material of the infrared objective lens 11 can be infrared materials such as zinc sulfide and zinc fluoride. The infrared sensor and the infrared image processor can be integrated on the same circuit board to form the infrared signal processing module 13. The infrared sensor gathers the infrared light signals passing through the infrared objective lens 11 and forms corresponding electrical signals through photoelectric conversion. The infrared image processor receives the electrical signal from the infrared sensor and processes it to output a corresponding infrared image signal, and displays the image in the interface according to the infrared image signal through the display module 14 . The infrared image processor can perform corresponding enhancement processing on infrared images by loading and running various image enhancement programs.

Wherein, the infrared light component 10 also includes a lens barrel 12, and the infrared objective lens 11, the infrared sensor, the infrared image processor, the display module 14 and the dichroic prism assembly 15 are all accommodated in the lens barrel. Inside the barrel 12; the infrared objective lens 11 is disposed at the light entrance at the front end of the barrel 12; the aiming mark component 20 is disposed on the inner wall of the barrel 12 and is in contact with the position of the dichroic prism component 15 Alignment. The lens barrel 12 has a cylindrical shape, a light entrance is provided at the front end of the lens barrel 12 , and an infrared objective lens 11 is installed at the light entrance for transmitting infrared light signals into the lens barrel 12 . The cavity inside the lens barrel 12 is formed as an infrared channel. The infrared light signal entering the lens barrel 12 through the infrared objective lens 11 travels along the extension direction of the infrared channel and is collected by the infrared sensor. The lens barrel 12 provides support for the installation and fixation of optical devices such as lenses in the infrared light assembly 10 and can absorb stray light incident on the inner surface of the lens barrel 12 to eliminate stray light. In this embodiment, the lens barrel 12 is made of aluminum alloy material. The end of the lens barrel 12 away from the light entrance is a closed end, and the top side of the lens barrel 12 is provided with a positioning groove near the closed end for the optical waveguide component 30 to pass through. The light coupling area of the optical waveguide component 30 33 is located at the rear end of the infrared channel in the lens barrel 12 , and the optical coupling area 34 is located outside the lens barrel 12 . Optionally, a bracket may be provided on the bottom side of the lens barrel 12 so that the scope imaging system can be installed on an optical sighting device, such as the body of a firearm, through the bracket.

In some embodiments, please refer to FIG. 3 , the optical waveguide component 30 further includes an optical waveguide substrate 32 , a first diffractive optical element 351 and a second diffractive optical element 352 disposed on the optical waveguide substrate 32 . The light coupling-in area 33 and the light-coupling-out area 34 are respectively located at opposite ends of the optical waveguide substrate 32 , and the first diffraction optical element 351 is located in the light coupling-in area 33 away from the optical signal of the infrared image. On one side of the incident direction, the second diffractive optical element 352 is located on the side of the light coupling area 34 close to the incident direction of the visible light signal. Wherein, the first diffractive optical element 351 and the second diffractive optical element 352 are both relief grating elements, and the microstructures in the relief grating elements that control light deflection are formed on the light coupling points at both ends of the optical waveguide substrate 32 by etching. On the corresponding side surfaces of the area 33 and the light coupling-out area 34 . After the optical signal of the infrared image superimposed with the aiming mark is calibrated by the optical waveguide eyepiece 31, it enters the light coupling area 33 of the optical waveguide base 32 in the form of parallel light, and is incident into the first diffractive optical element 351, and the light is The first diffractive optical element 351 reflects at a specific angle between the two optical reflection planes 321 on both sides of the optical waveguide substrate 32, propagates through total reflection between the two optical reflection planes 321, and finally enters the light at a specific angle. In the out-coupling area 34, and incident into the second diffractive optical element 352, the light is finally reflected by the second diffractive optical element 352 and then emitted from the side of the optical out-coupling area 34 away from the second diffractive optical element 352; the optical out-coupling area 34 is located on the visible light image imaging path L3. The visible light signal is transmitted in the form of parallel light through the second diffractive optical element 352 and enters the light coupling area 34. There is an aiming direction superimposed along the initial incident direction and reflected by the second diffractive optical element 352. The optical signals of the infrared image imaged by the mark are superimposed and emitted from the side of the light coupling area 34 away from the second diffraction optical element 352 to realize the three-light image fusion of the white light image, the infrared image and the aiming mark imaging. The observation position 40 is provided on the side where light emerges from the optical waveguide component 30 , and human eyes can directly observe images at the observation position 40 .

The type of the optical waveguide component 30 is not limited to the diffractive optical waveguide described in the above embodiments. As shown in FIG. 4 , it is another optional embodiment of the optical waveguide component 30 , in which the first diffractive optical element 351 and The second diffractive optical element 352 is a holographic grating element. Different from the relief grating element, the microstructure that controls light deflection in the holographic grating element is formed inside the grating element through etching.

As shown in FIG. 5 , it is another optional embodiment of the optical waveguide component 30 , wherein the optical waveguide component 30 includes an optical waveguide substrate 32 and a mirror array located in the optical waveguide substrate 32 , and the light is coupled into The area 33 and the light coupling-out area 34 are respectively located at opposite ends of the optical waveguide substrate 32. The light-coupling area 33 is provided with an inclined reflector 36 on the side away from the incident direction of the optical signal of the infrared image. , the mirror array includes a plurality of beam splitters 37 spaced apart in the light coupling area 34 . After the optical signal of the infrared image superimposed with the aiming mark is calibrated by the optical waveguide eyepiece 31, it enters the light coupling area 33 of the optical waveguide base 32 in the form of parallel light, and is incident on the tilted reflector 36, and passes through the tilted reflector. 36 is reflected at a specific angle and is incident on the optical reflection plane 321 on the side of the optical waveguide substrate 32 away from the tilted reflector 36. After total reflection by the optical reflection plane 321, it enters the optical coupling area 34 at a specific angle. Among the plurality of beam splitters 37 arranged at intervals, the last beam splitter 37 is a total reflection mirror, and the front beam splitters 37 are all semi-transmissive and semi-reflective mirrors. The frontmost beam splitter 37 receives the total reflected light. When light is emitted, part of the light is reflected out of the optical waveguide substrate 32 and emitted from the side of the optical coupling area 34 close to the observation position 40, and the other part of the light is transmitted through to be incident on the next beam splitter 37; the next beam splitter 37 receives the light in front When the light is transmitted through the beam splitter 37, part of the light is reflected out of the optical waveguide base 32 and emitted from the side of the optical coupling area 34 close to the observation position 40, and the other part of the light is transmitted again to be incident on the next beam splitter 37; thus In the same way, until the last beam splitter 37 receives the light transmitted from the front beam splitter 37, all the received light will be reflected out of the optical waveguide substrate 32 and emitted from the side of the optical coupling area 34 close to the observation position 40. Among them, by arranging a plurality of beam splitters 37 at intervals in the light coupling area 34, the exit pupil range of the optical waveguide assembly 30 can be effectively increased.

Optionally, please refer to FIG. 1 again. The scope imaging system also includes a housing 50 . The housing 50 covers the periphery of the portion of the optical waveguide assembly 30 that protrudes outside the lens barrel 12 . The side of the housing 50 close to the incident direction of visible light and the part corresponding to the light outcoupling area 34 is formed as a first transparent window for the transmission of visible light signals. The side of the housing 50 close to the observation position 40 is connected to the light outcoupling area 34 The corresponding part is formed as a second transparent window. The size of the space inside the housing 50 can be set according to the thickness of the optical waveguide component 30. In this embodiment, the distance between the first transparent window and the second transparent window is as small as possible to provide the optical waveguide component 30 with a space within which it can be accommodated. It suffices within the housing 50 , which makes the overall structure of the scope imaging system lighter and can also reduce the loss in the passage of visible light. The visible light signal is incident from the first transparent window, and the path emitted from the second transparent window after being transmitted through the light coupling area 34 of the optical waveguide assembly 30 can be regarded as the visible light image imaging path L3. The first transparent window and the first transparent window are located in the housing 50. The channel between the two transparent windows can be regarded as a visible light channel.

The scope imaging system provided by the above embodiments of the present application has at least the following characteristics:

First, the infrared image in the display module 14 serves as the light source system of the optical waveguide component 30. The infrared image superimposed with the optical signal of the aiming mark is incident into the optical waveguide component 30 in the form of an optical signal, and is transmitted to the visible light image for imaging via the optical waveguide component 30. The path L3 is aligned with the human eye observation position 40. By using optical waveguide transmission to replace the traditional complex mirror imaging system, the multi-channel optical signal fusion of infrared light, visible light and aiming mark light can be realized, which can greatly simplify the design of the sight imaging system. structure to achieve the purpose of overall lightweight;

Second, the optical waveguide component 30 can receive optical signals through a larger light coupling area 33, thereby receiving a larger scene field of view; the optical waveguide component 30 has a multi-dimensional pupil expansion function, and the user can adjust the pupil expansion function at different observation positions 40. The complete fused image can be seen in all directions, allowing users to see the complete sight of the scope in a larger range and achieving multi-dimensional exit pupil observation purposes;

Third, use the dichroic prism assembly 15 located behind the display module 14 to superimpose the aiming mark light signal emitted by the aiming mark assembly 20 into the infrared image, and transmit it along the same optical path as the light signal of the infrared image along the infrared image imaging path L1. After the waveguide component 30 is transmitted, parallel light is incident on the human eye. The imaging of the aiming mark forms an infinite virtual image in the human eye, and is then combined with the observed target for aiming. Therefore, the sight can be locked no matter how the human eye deviates. target to avoid parallax caused by shaking when aiming, especially suitable for aiming at targets in sports scenes.

Fourth, the scope imaging system can be applied to other optical sighting equipment, such as combining with shotguns to form a combined sighting system. It can not only achieve infrared light and visible light dual channels with red dot sighting for all-weather observation and accuracy of targets under complex conditions. Aiming, it also has the characteristics of light weight, small size, hardly blocking the direct field of view, one-dimensional or two-dimensional pupil expansion technology, simple structure, easy assembly and low cost.

On the other hand, the embodiment of the present application also provides a combined sighting system, including an optical sighting device and the scope imaging system described in the embodiment of the present application. The scope imaging system can be used as an accessory of an optical sighting device and is assembled on the body of the optical sighting device to provide a precise aiming function.

Optionally, the optical sighting device may be various devices that require the use of imaging to observe specific targets within the target field of view, such as shotguns, telescopes, infrared thermal imaging cameras, etc.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be covered by the protection scope of the present invention. The protection scope of the present invention should be determined by the protection scope of the claims.

Claims

A scope imaging system, characterized by including an infrared light component (10), an aiming mark component (20) and an optical waveguide component (30);

The infrared light component (10) includes a display module (14) disposed on the infrared image imaging path (L1). The infrared light component (10) is used to acquire infrared light signals within the target field of view. According to the infrared light component The light signal forms an infrared image and is displayed in the display module (14);

The aiming mark assembly (20) is used to emit an aiming mark optical signal, and the aiming mark optical signal and the optical signal of the infrared image displayed in the display module (14) are along the infrared image imaging path (L1) The common optical path is transmitted to the optical waveguide component (30);

The optical waveguide component (30) includes a light coupling-in area (33) located on the infrared image imaging path (L1) and a light-coupling area (34) located on the visible light image imaging path (L3). The coupling area (33) corresponds to the display module (14), and the aiming mark optical signal and/or the infrared image displayed in the display module (14) is incident on the optical coupling in the form of an optical signal. The region (33) is transmitted to the light coupling-out region (34) through the optical waveguide component (30), and the visible light transmitted along the visible light image imaging path (L3) in the light coupling-out region (34) The signals are fused and coupled out from the optical coupling area (34) to the observation position (40).
The scope imaging system according to claim 1, wherein the infrared light assembly (10) further includes the light coupling area located at the display module (14) and the optical waveguide assembly (30). The beam splitter prism assembly (15) between (33);

The dichroic prism assembly (15) is provided with an inclined dichroic surface (151), and the display module (14) and the aiming mark assembly (20) are respectively located on opposite sides of the dichroic surface (151). The light splitting surface (151) adjusts the transmission optical path of the aiming mark optical signal so that the aiming mark optical signal and the optical signal of the infrared image are transmitted along the same optical path as the infrared image imaging path (L1).
The sight imaging system according to claim 2, characterized in that a light-transmitting film is provided on the side of the light splitting surface (151) facing the display module (14) and facing the aiming mark assembly (20). There is a reflective film on one side;

The infrared image displayed in the display module (14) is incident on the light-transmitting film in the form of a light signal and is transmitted through, and the aiming mark optical signal emitted by the aiming mark assembly (20) is incident on the reflective film. film, through the reflective film, the aiming mark optical signal is reflected and transmitted along the common optical path along the infrared image imaging path (L1).
The front aiming device according to claim 2, characterized in that the optical waveguide assembly (30) further includes the optical coupling located between the dichroic prism assembly (15) and the optical waveguide assembly (30). optical waveguide eyepiece (31) between areas (33);

The aiming mark light signal is reflected by the dichroic prism assembly (15) and merged with the light signal of the infrared image transmitted through the dichroic prism assembly (15), and is incident together along the infrared image imaging path (L1) to the optical waveguide eyepiece (31), and is converted into parallel light by the optical waveguide eyepiece (31) and emitted to the light coupling area (33).
The scope imaging system according to claim 2, characterized in that the incident direction of the aiming mark optical signal incident on the light splitting surface (151) of the aiming mark assembly (20) is consistent with the direction of the display module (14). ) in the infrared image, the incident directions of light signals incident on the light splitting surface (151) are perpendicular to each other;

The aiming mark assembly (20) includes a red point light source, which emits a red point light signal toward the light splitting surface (151), and is reflected by the light splitting surface (151) along a direction perpendicular to the original propagation direction. The infrared image imaging path (L1) of (L21) exits toward the light coupling area (33).
The scope imaging system according to claim 2, characterized in that the infrared light component (10) further includes an infrared objective lens (11), an infrared sensor and an infrared image processor, the infrared objective lens (11), the The infrared sensor, the infrared image processor, the display module (14) and the dichroic prism assembly (15) are sequentially arranged along the infrared image imaging path (L1);

The infrared objective lens (11) is used to receive infrared light signals within the target field of view;

The infrared sensor receives the infrared light signal collected by the infrared objective lens (11) and converts it into an electrical signal;

The infrared image processor processes the electrical signal, and displays the infrared image formed by the processed electrical signal through the display module (14).
The scope imaging system according to claim 6, characterized in that the infrared light component (10) further includes a lens barrel (12), the infrared objective lens (11), the infrared sensor, the infrared image processing The device, the display module (14) and the dichroic prism assembly (15) are all housed in the lens barrel (12);

The infrared objective lens (11) is located at the light entrance at the front end of the lens barrel (12);

The aiming mark assembly (20) is provided on the inner wall of the lens barrel (12) and is aligned with the position of the dichroic prism assembly (15).
The sight imaging system according to any one of claims 1 to 7, characterized in that the optical waveguide assembly (30) further includes an optical waveguide base (32), which is provided on the optical waveguide base (32). The first diffractive optical element (351) and the second diffractive optical element (352), the light coupling region (33) and the light coupling region (34) are respectively located opposite to the optical waveguide substrate (32). At both ends, the first diffractive optical element (351) is located on the side of the light coupling area (33) away from the incident direction of the light signal of the infrared image, and the second diffractive optical element (352) is located on the The light coupling-out area (34) is close to the side of the incident direction of the visible light signal.
The scope imaging system of claim 8, wherein the first diffractive optical element (351) and the second diffractive optical element (352) are both holographic grating elements or relief grating elements.
The scope imaging system according to any one of claims 1 to 7, characterized in that the optical waveguide assembly (30) further includes an optical waveguide base (32) and an optical waveguide located in the optical waveguide base (32). Mirror array, the light coupling region (33) and the light coupling out region (34) are located at opposite ends of the optical waveguide substrate (32), and the light coupling region (33) is located away from the An inclined reflective surface (36) is provided on one side of the incident direction of the light signal of the infrared image, and the mirror array includes a plurality of beam splitters (37) spaced apart in the light coupling area (34).
A combined sighting system, characterized by comprising an optical sighting device and the sight imaging system according to any one of claims 1 to 10.
The combined sighting system of claim 11, wherein the optical sighting device is one of the following: a shotgun, a telescope, or an infrared thermal imaging camera.