CN220288408U - Combined aiming system and optical system thereof - Google Patents

Abstract

The application provides a combined type aiming system and an optical system thereof, wherein the optical system comprises an optical inlet module, an imaging module and a pupil expansion visual module; the light entering module is used for collecting light signals in the target view field and converging the light signals to the imaging module; the optical input module comprises a foldback lens group and an objective lens, wherein the foldback lens group reflects an incident optical signal for multiple times to form a folding optical path, and finally reflects the optical signal to the objective lens, and the optical signal is refracted and converged by the objective lens to be emitted to the imaging module; the imaging module comprises an image processing unit and a display module, wherein the image processing unit is used for converting the optical signals into images and displaying the images through the display module; the pupil expansion visual module comprises an optical waveguide assembly, the optical waveguide assembly comprises an optical coupling-in area and an optical coupling-out area which correspond to the display module and the observation position respectively, an image displayed in the display module is incident to the optical coupling-in area in an optical signal mode, is transmitted to the optical coupling-out area through the optical waveguide assembly, and is coupled to the observation position through the optical coupling-out area.

Description

Combined aiming system and optical system thereof

Technical Field

The present application relates to the field of optical devices, and in particular, to a combined aiming system and an optical system thereof.

Background

Currently, sighting telescope is widely used in optical sighting devices, such as shotguns. The optical system of the traditional sighting telescope has a smaller field angle and cannot observe a scene with a larger range, and the optical system of the traditional sighting telescope only has an exit pupil with a fixed size, when the sighting telescope is used, only the human eye is just placed at the position of the exit pupil and can completely see an image in the field of view, the human eye can not observe a complete lens field of view at any position except the position of the exit pupil, but the exit pupil is generally smaller, namely the eye movement range is small, and the complete image can not be seen once the human eye deviates from the position of the exit pupil, so the position of the exit pupil needs to be found before sighting is carried out and the pose is kept unchanged, and the mode can cause a certain influence on hunting experience; in addition, in the shooting process, the relative positions of the human eyes and the sighting telescope are easy to change due to the vibration of a firearm, and the human eyes are required to be placed on the exit pupil of the sighting telescope again after each shooting, so that the shooting efficiency is affected; in addition, only human eyes are supported to observe external scenes indirectly through the sighting telescope during sighting, but the field of view is generally smaller, a large-range external scene cannot be observed directly, perception of external dynamic change is poor, and hunting experience is affected.

Disclosure of Invention

In order to solve the existing technical problems, the application provides a combined aiming system capable of realizing a pupil expansion effect and an optical system thereof.

In order to achieve the above purpose, the technical solution of the embodiments of the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides an optical system, including an optical input module, an imaging module, and a pupil expansion visual module; the light entering module is used for collecting light signals in a target view field and converging the light signals to the imaging module; the light incident module comprises a foldback type lens group and an objective lens, wherein the foldback type lens group reflects incident light signals for multiple times to form a folding light path, the folding light path is finally reflected to the objective lens, and the light signals are refracted and converged by the objective lens and are emitted to the imaging module; the imaging module comprises an image processing unit and a display module, wherein the image processing unit is used for converting an optical signal into an image and displaying the image through the display module; the pupil expansion visual module comprises an optical waveguide assembly, the optical waveguide assembly comprises an optical coupling-in area and an optical coupling-out area which correspond to the display module and the observation position respectively, the image displayed in the display module is incident to the optical coupling-in area in the form of an optical signal, is transmitted to the optical coupling-out area through the optical waveguide assembly, and is coupled to the observation position through the optical coupling-out area.

In a second aspect, embodiments of the present application provide a combined targeting system, including an optical targeting device and an optical system as described in any of the embodiments of the present application.

The optical system provided by the embodiment of the utility model comprises the light incident module and the lens, wherein the light incident module comprises a foldback lens group and an objective lens, the foldback lens group reflects an incident light signal for a plurality of times to form a folding light path, the folding light path is finally reflected and shot to the objective lens, the folding light path is refracted and converged by the objective lens and shot to the imaging module, and the imaging module forms an image and displays the image; the folding lens group forms a folding light path for the incident light signals and then converges the light signals to the imaging module, so that aberration correction is facilitated, the imaging light path is shortened, and the length of an optical axis of the optical system in the direction along which the light signals are incident is reduced; the optical signal of the image displayed by the imaging module is incident to the optical waveguide assembly, the optical waveguide assembly conducts the optical signal of the image to the optical coupling-out area and then emits the optical signal to the rear observation position, the optical waveguide assembly can receive the optical signal of the image through the optical coupling-in area with a larger area, so that the optical waveguide assembly can support to receive a relatively larger scene view, the copying of the exit pupil position can be realized through utilizing the optical waveguide transmission, the pupil expansion function is realized, a user can see the complete fused image in different directions of the observation position, and therefore, the user can see the complete sight view in a larger range, and the purpose of observing in a larger range is realized.

In the above embodiments, the combined aiming system including the optical system is the same concept as the corresponding optical system embodiments, so that the combined aiming system has the same technical effects as the corresponding optical system embodiments, and will not be described herein.

Drawings

FIG. 1 is a schematic diagram of an optical system according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of an optical system according to another embodiment of the present disclosure;

FIG. 3 is a schematic view of an optical system according to another embodiment of the present disclosure;

FIG. 4 is a schematic view of an optical system according to another embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an optical system according to another embodiment of the present application.

The reference numerals of the elements in the drawings are as follows:

light-in module 11, main mirror 111, light-in part 1113, light-transmitting part 1114, sub-mirror 112, objective lens 113, turn-back lens group 115, image processing unit 13, display module 14, imaging module 16, aiming mark assembly 20, aiming mark light source 21, light-combining mirror 22, pupil-expanding visual module 30, optical waveguide eyepiece 31, optical waveguide substrate 32, light-in region 33, light-out region 34, beam splitter array 37, beam splitter prism 371, optical waveguide assembly 39, viewing position 40

Detailed Description

The technical scheme of the application is further elaborated below by referring to the drawings in the specification and the specific embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the implementations of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the description of the embodiments of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the following description, reference is made to the expression "some embodiments" which describe a subset of all possible embodiments, it being noted that "some embodiments" may be the same subset of all possible embodiments or different subsets, and that technical means mentioned between different embodiments, and in different embodiments, may be combined with each other without conflict.

In the optical system of a conventional telescope, the image is usually provided with only one "exit" on the imaging light path, called exit pupil, i.e. the human eye can only see the complete image at the position of the exit pupil, and the complete image cannot be seen when deviating from the exit pupil. In order to make the image have a larger range of exit pupils, the image needs to be subjected to pupil expansion, the exit pupils can be duplicated for a plurality of times through optical waveguide transmission, each exit pupil can output the same image, and thus, when eyes can move in a certain range, the complete image can be seen, namely, the pupil expansion is realized.

The mydriasis can be further divided into one-dimensional mydriasis and two-dimensional mydriasis. Based on the structural design that the pupil-expanding visual module mainly comprises an optical waveguide assembly, the pupil-expanding purpose is achieved by using the optical waveguide assembly, and the optical waveguide assembly can comprise a geometric optical waveguide (also called an array optical waveguide) and a diffraction optical waveguide. The geometric optical waveguide can be provided with a reflector array in an optical coupling-out area of the optical waveguide substrate, so that one-dimensional pupil expansion of an image in the arrangement direction of the reflector array is realized, the optical coupling-in area and the optical coupling-out area are respectively arranged at two ends of the optical waveguide substrate in the length direction by taking the width direction and the length direction of the optical waveguide substrate as an example, and the reflector array is arranged along the length direction of the optical waveguide substrate, so that one-dimensional pupil expansion of the image in the length direction of the optical waveguide substrate can be realized. The diffraction optical waveguide can realize one-dimensional pupil expansion or two-dimensional pupil expansion by utilizing the grating structure to expand and couple light beams according to different grating elements, for example, the grating elements can comprise relief grating elements formed on an optical waveguide substrate by adopting a photoetching technology and holographic grating elements manufactured based on a holographic technology, the distribution of microstructures for controlling light deflection in the grating elements is arranged, so that light beams of an image enter and pass through different diffraction gratings to realize that a plurality of subareas in one dimension or two dimensions copy exit pupils respectively, the width direction and the length direction of the optical waveguide substrate are taken as an example, the light coupling-in area and the light coupling-out area are respectively arranged at two ends of the length direction of the optical waveguide substrate, the light coupling-in area and the light coupling-out area are respectively provided with the grating elements, and the one-dimensional pupil expansion of the image in the length direction of the optical waveguide substrate or the two-dimensional pupil expansion of the image in the width direction and the length direction of the optical waveguide substrate can be realized by utilizing the distribution of microstructures of the grating elements.

It should be noted that, the pupil expansion visual module may include performing one-dimensional pupil expansion by using the optical waveguide assembly based on the structural design of the optical waveguide assembly, and combining the optical waveguide assembly with other optical elements to achieve the purpose of more-dimensional pupil expansion.

Secondly, the sighting telescope is generally divided into a thermal image sighting telescope and a white light sighting telescope, and is used together with a red point sighting function, and the thermal image sighting telescope has the advantages that hunting at night can be realized, and hunting objects can be clearly observed in dark night environment through a thermal imaging principle; the white light sighting telescope has the advantages that the hunting objects with different distances can be clearly observed through zooming, the red point sighting function is convenient for assisting a user in sighting an imaging object, and the accurate shooting advantage is improved under any light condition. To be compatible with the advantages of thermal image sighting telescope, white light sighting telescope and red dot sighting telescope, it is necessary to blend the infrared light, visible light and red dot light before the human eye observes the image, and imaging with the blend of multi-channel light signals (infrared light signal, visible light signal and red dot light signal) is utilized to make the sighting telescope while retaining the multiple advantages of infrared night vision, white light zoom and image detail, and red dot sighting. The multi-channel optical signal fusion can be divided into double-light fusion of visible light and red point light, double-light fusion of infrared light and red point light and triple-light fusion of infrared light, visible light and red point light. In the application, under the technical conception based on the structural design that the pupil expansion visual module comprises an optical waveguide assembly, multichannel optical signals to be fused are synchronously incident into the optical waveguide substrate in an optical coupling-in area or an optical coupling-out area of the optical waveguide assembly, and the optical waveguide transmission is utilized to replace the traditional complex mirror image transfer system to complete the fusion, so that the structure of the sighting telescope can be simplified, and the aim of lighter overall is fulfilled.

In addition, based on the structural design that the pupil expansion visual module mainly comprises an optical waveguide assembly, the incidence of an optical signal of an imaging optical path can be optimized, so that the imaging optical path is shortened, the length of an optical axis of an optical system of the sighting telescope in the direction along which the optical signal is incident is reduced, the purposes of more compact structure, size reduction and further light weight improvement are achieved.

Referring to fig. 1, an optical system provided in an embodiment of the present application may be applied to a scope, where the optical system includes an optical input module 11, an imaging module 16, and a pupil expansion visual module 30; the light entering module 11 is used for collecting light signals in a target field of view and converging the light signals to the imaging module 16; the light-entering module 11 comprises a foldback lens group 115 and an objective lens 113, wherein the foldback lens group 115 forms a folding light path by reflecting an incident light signal for a plurality of times, and finally reflects the light signal to the objective lens 113, and the light signal is refracted and converged by the objective lens 113 to be emitted to the imaging module 16; the imaging module 16 includes an image processing unit 13 and a display module 14, the image processing unit 13 is used for converting the optical signal into an image, and the image is displayed by the display module 14; the mydriatic viewing module 30 includes an optical waveguide assembly 39, the optical waveguide assembly 39 includes an optical in-coupling region 33 and an optical out-coupling region 34 corresponding to the display module 14 and the observation position 40, respectively, and an image displayed in the display module 14 is incident on the optical in-coupling region 33 in the form of an optical signal, is transmitted to the optical out-coupling region 34 through the optical waveguide assembly 39, and is coupled out to the observation position 40 by the optical out-coupling region 34.

The fold-back lens group 115 forms a folded light path by reflecting the incident light signal for a plurality of times, that is, the imaged light signal forms at least one travel path opposite to the incident direction by reflecting the fold-back lens group 115 before converging the imaged light signal to the imaging module 16 in the incident direction of the light signal. The folded optical path is formed such that the transmission path length of the imaged optical signal can be effectively increased and the optical axis length of the optical system in the direction along which the optical signal is incident can be reduced within a same distance (e.g., the distance between the primary mirror 111 and the secondary mirror 112 of the fold-back lens group 115) along the direction along which the optical signal is incident.

In the above embodiment, the optical system is designed by the light incident module 11 in front of the imaging light path, the light incident module 11 includes the folded lens group 115 and the objective lens 113, the folded lens group 115 forms the folded light path by multiple reflections of the incident light signal, and finally reflects the light signal to the objective lens 113, and refracts and converges the light signal to the imaging module 16 by the objective lens 113, and the imaging module 16 forms an image and displays the image; the folded lens group 115 forms a folded light path for the incident light signal and then converges the light signal to the imaging module 16, which is favorable for correcting aberration, shortening the imaging light path and reducing the length of the optical axis of the optical system in the direction along which the light signal is incident; the optical signal of the image displayed by the imaging module 16 is incident to the optical waveguide assembly 39, the optical waveguide assembly 39 transmits the optical signal of the image to the optical coupling-out area 34 and then emits the optical signal to the rear observation position 40, the optical waveguide assembly 39 can receive the optical signal of the image through the optical coupling-in area 33 with a larger area, so that the optical waveguide assembly 39 can support receiving a relatively larger scene view, the copying of the exit pupil position can be realized by utilizing the optical waveguide transmission, the pupil expansion function is realized, and a user can see the complete fused image in different directions of the observation position 40, so that the user can see the complete image in a larger range, and the purpose of larger-range observation is realized.

The imaging module 16 includes an image processing unit 13 and a display module 14, where the image processing unit 13 receives the optical signals collected by the optical module 11 through the objective lens 113, converts the optical signals into electrical signals, and sends the processed electrical signals to the display module 14 to form an image, and the image is displayed by the display module 14. It should be noted that, in the embodiment of the present application, the imaging optical path refers to an optical path provided with an optical signal imaged by the imaging module 16 to be displayed in the display module 14, where the optical signal may be a visible light signal or an infrared light signal, the image processing unit 13 includes an image sensor and an image processor, and the objective lens 113, the image sensor and the display module 14 are sequentially arranged along the incident direction of the optical signal, where the objective lens 113 and the image sensor are correspondingly selected according to the type of the imaged optical signal, for example, if the optical signal in the imaging optical path refers to the visible light signal, the objective lens 113 and the image sensor are correspondingly a white light objective lens and a visible light sensor, and the multi-channel optical signal fusion implemented by the optical system of the sighting telescope mainly refers to the dual optical fusion of the visible light and the sighting mark optical signal; if the imaged optical signal is an infrared optical signal, the objective lens 113 and the image sensor are respectively an infrared objective lens and an infrared sensor, and the multi-channel optical signal fusion realized by the optical system of the sighting telescope can be double-optical fusion of infrared light and an aiming mark optical signal or triple-optical fusion of infrared light, visible light and an aiming mark optical signal.

In some embodiments, the refractive lens group 115 includes a primary mirror 111 and a secondary mirror 112; the sub-mirror 112, the main mirror 111, and the objective lens 113 are sequentially arranged along the direction in which the optical signal is incident; the main mirror 111 includes an incident light portion 1113 and a light transmitting portion 1114, the incident light signal is received by the incident light portion 1113 and reflected to the sub-mirror 112, and the light signal reflected by the incident light portion 1113 is reflected to the light transmitting portion 1114 by the sub-mirror 112, passes through the light transmitting portion 1114, and is then directed to the objective lens 113. The sub-mirror 112 is positioned in front of the main mirror 111 in the incident direction of the imaged optical signal, and the main mirror 111 includes an incident portion 1113 for receiving the optical signal of the incident light and a light-transmitting portion 1114 through which the finally reflected light passes. The light entrance part 1113 reflects the incident light signal to the sub-mirror 112, the sub-mirror 112 reflects the light signal reflected to the surface thereof by the light entrance part 1113 again to the light transmission part 1114 of the main mirror 111, and the light signal is transmitted through the light transmission part 1114 and then is directed to the objective lens 113, and the light signal imaged by the main mirror 111 and the sub-mirror 112 is reflected twice to form a folded light path. In addition, the main mirror 111 can increase the incident area of the received light signal by using the light inlet 1113, so as to facilitate collection of the light signal in a larger field of view of the scene in the target field of view. The imaged optical signal may be a visible light signal or an infrared light signal, and the materials of the main mirror 111 and the sub-mirror 112 are correspondingly matched with the types of the optical signals of the imaging optical path, if the imaged optical signal is a visible light signal, the main mirror 111 and the sub-mirror 112 should be selected to be capable of reflecting the visible light signal, and if the imaged optical signal is an infrared light signal, the main mirror 111 and the sub-mirror 112 should be selected to be capable of reflecting the infrared light signal.

In some embodiments, the primary mirror 111 is radially larger in size than the secondary mirror 112, and a portion of the primary mirror 111 that is radially larger than the secondary mirror 112 is formed as the light-entering portion 1113. The sub-mirror 112 and the main mirror 111 are coaxially disposed, and the main mirror 111 includes a central portion corresponding to the sub-mirror 112 in the incident direction of the imaged optical signal, which is aligned with the position of the sub-mirror 112, and a peripheral portion surrounding the central portion, which is formed as an incident portion 1113 of the main mirror 111, and whose size is generally equal to or slightly smaller than that of the sub-mirror 112.

In some embodiments, the primary mirror 111 and the secondary mirror 112 are both curved lenses, the side of the primary mirror 111 facing the incident optical signal being concave, and the side of the secondary mirror 112 facing the primary mirror 111 being convex; the light transmitting portion 1114 includes a through hole aligned with the sub-mirror 112 and the objective lens 113 in the optical axis direction, and the size of the through hole is smaller than or equal to the sub-mirror 112. Wherein the perforation is aligned with the secondary mirror 112 and the objective lens 113, that means that the position and the size of the perforation are designed and determined according to the position and the size of a first light spot formed when the light reflected by the secondary mirror 1112 passes through the position of the primary mirror 1111, and the position and the size of the objective lens 113 are designed and determined according to the position and the size of a second light spot formed when the light reflected by the secondary mirror 1112 passes through the position of the objective lens 113, in this embodiment, the axes of the secondary mirror 112, the perforation and the objective lens 113 are located on the same axis, the size of the perforation is smaller than or equal to the size of the secondary mirror 112, and the size of the objective lens 113 is larger than the size of the perforation. The primary mirror 111 and the secondary mirror 112 are respectively configured as mirrors with a certain degree of curvature, and the reflection of the curved surfaces can be used to better correct the aberration, and the optical signals reflected twice by a set of curved surfaces of the primary mirror 111 and the secondary mirror 112 can be more gathered towards the objective lens 113, so as to better reduce the length of the optical axis of the optical system in the direction along which the optical signals are incident.

In some embodiments, the optical waveguide assembly 39 includes an optical waveguide eyepiece 31 and an optical waveguide substrate 32, and an optical in-coupling region 33 and an optical out-coupling region 34 are formed at opposite ends of the optical waveguide substrate 32, respectively, the optical waveguide eyepiece 31 being positioned in front of the optical in-coupling region 33 for amplifying and converting optical signals of an image displayed in the display module 14 into parallel optical signals. The optical waveguide eyepiece 31 is disposed between the display module 14 and the light in-coupling region 33, and an optical signal of an image displayed in the display module 14 is directed to the optical waveguide eyepiece 31, and the image is amplified and converted into parallel light by the optical waveguide eyepiece 31 and is emitted to the optical waveguide substrate 32. The light out-coupling region 34 and the light in-coupling region 33 are disposed at opposite ends of the optical waveguide substrate 32, and the position of the exit pupil can be more flexibly set by using optical waveguide transmission, so that the viewing position 40 of the human eye is disposed behind the light out-coupling region 34, and is not limited to being disposed behind the imaging optical path.

In some embodiments, referring to fig. 2, the optical system further comprises an aiming mark assembly 20, the aiming mark assembly 20 comprising a light combiner 22 and an aiming mark light source 21; the light converging lens 22 is disposed between the display module 14 and the optical waveguide eyepiece 31, and includes a first light incident surface and a second light incident surface facing the display module 14 and the aiming mark light source 21, wherein an image displayed in the display module 14 is transmitted through the light converging lens 22 and is directed to the optical waveguide eyepiece 31 in the form of an optical signal, and an aiming mark light signal emitted by the aiming mark light source 21 is directed to the second light incident surface, reflected by the second light incident surface and then directed to the optical waveguide eyepiece 31. The light combining mirror 22 is configured to transmit or reflect light beams with different spectrums when passing through, so as to adjust a transmission light path of the sighting mark light signal, wherein the first light incident surface may be provided with a light transmitting film through which the light signal of the image is transmitted, and the second light incident surface may be provided with a light reflecting film which reflects the sighting mark light signal to change an original propagation direction and then combines with the light signal transmitted through the first light incident surface. The light-transmitting film and the reflecting film can respectively utilize different spectral ranges of different lights to realize the transmission and reflection functions of corresponding lights. For example, for an image with a spectral range of the optical signal a and a spectral range of the sighting mark optical signal B, the light-transmitting film realizes high transmittance for light with the spectral range of a and high reflectivity for light outside the spectral range of a; the reflective film achieves a high reflectance for light in the spectral range B and a high transmittance for light in the spectral range a.

In one example, the aiming mark light source 21 is a red point light source and the aiming mark light signal is a red point light signal. It should be noted that the use of a red light point light source as the sighting mark light source 21 is a relatively conventional manner in the field of sighting mirrors, but the use of a light source capable of functioning as a sighting mark is not limited to a red light point light source.

The incidence direction of the optical signal of the image on the first incidence surface is perpendicular to the incidence direction of the aiming mark optical signal on the second incidence surface. The sighting mark light signal emitted by the sighting mark light source 21 is emitted to the second light incident surface along the original propagation direction perpendicular to the imaging light path, and is reflected and adjusted by the second light incident surface to be transmitted with the imaging light path in a common light path, namely, the sighting mark imaging equivalent to the sighting mark light signal is overlapped in the image displayed by the display module 14 and then is jointly emitted to the optical waveguide ocular 31. As in fig. 2, L21 represents the original propagation direction of the sighting mark optical signal, and L22 represents the propagation direction of the sighting mark optical signal after reflection. In an alternative example, the light combining lens 22 is a light splitting prism assembly, and the light splitting prism assembly is rectangular overall, and includes a light incident surface facing the display module 14, a light emergent surface facing the light waveguide assembly 39, and a light splitting surface obliquely connected between the light incident surface and the light emergent surface, where a projection of the light splitting surface on the light incident surface is greater than or equal to a projection of the display module 14 on the light incident surface. In this embodiment, the size of the light incident surface is greater than the size of the display module 14, the first intersection position of the light splitting surface 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 and the light emergent surface is flush with the top surface of the display module 14, so that a first distance is formed between the first intersection position and the bottom surface of the light splitting prism assembly, and a second distance is formed between the second intersection position and the top surface of the light splitting prism assembly, so that the light emergent range 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, and the mechanical stress of the light splitting prism assembly can be improved.

In some embodiments, the optical system further includes an in-coupling region corresponding to the out-coupling region 34, the out-coupling region 34 transmitting light signals entering from the in-coupling region therethrough such that the image of the target field of view formed by the imaging module 16 is observed at the observation site 40 while the target field of view is directly observable through the out-coupling region 34 and the in-coupling region. The optical system includes a housing that accommodates optical elements such as the light-in module 11, the imaging module 16, and the pupil-expanding visual module 30, where a portion of the housing corresponding to the light-out area 34 facing the incident direction of the optical signal forms a light-in window, so that the visible light signal in the target field of view enters from the light-in window and is transmitted through the light-out area 34, and the visible light of the target field of view can be directly superimposed in the image emitted from the light-out area 34, so as to realize fusion of the multichannel optical signals, for example, the optical signal in the imaging optical path refers to infrared light, and the fusion of the multichannel optical signals refers to three-light fusion of infrared light, visible light and aiming mark light.

In some embodiments, referring to fig. 3, the mydriatic vision module further includes a beam splitter array 37, and the optical waveguide assembly 39 is combined with the beam splitter array 37 to form a two-dimensional mydriatic module. The spectroscopic array 37 is disposed between the optical waveguide eyepiece 31 and the optical waveguide substrate 32.

The beam splitter array 37 includes a beam splitter prism set including a plurality of beam splitters 371 sequentially arranged in one direction along the first dimension. The optical signal propagation direction within optical waveguide substrate 32 is taken as a reference dimension, the first dimension being perpendicular to the reference dimension. As shown in fig. 3, the incident direction of the optical signal is the X direction, the reference dimension is the Z direction perpendicular to the paper surface, the first dimension is the Y direction perpendicular to the X direction and the Z direction, the size of the beam splitter array 37 in the first dimension direction is substantially the same as the size of the optical waveguide substrate 32, and an optical coupling-in region extending along the first dimension direction is formed on the side of the optical waveguide substrate 32 facing the beam splitter array 37. The spectroscopic array 37 includes a light entrance surface aligned with the optical waveguide eyepiece 31, and a light exit surface aligned with the light incoupling region of the optical waveguide substrate 32. In the beam splitting prism group, one beam splitting prism 371 is aligned with the optical waveguide ocular 31, receives the incident light beam emitted after being aligned by the optical waveguide ocular 31, transmits one part of the incident light beam out of the light emitting surface of the beam splitting prism array 37 along the original incident direction (the direction of incidence of the optical signal), and reflects the other part of the incident light beam to the adjacent beam splitting prism 371 along the direction perpendicular to the original incident direction (the first dimension direction); a part of the reflected light beam is transmitted to the next adjacent prism 371 along the original incidence direction (first dimension direction) by the adjacent prism 371, and the other part is reflected out of the light emitting surface of the beam splitter array 37 along the normal original incidence direction (direction of incidence of the light signal); and so on, until the outermost dichroic prism 371 arranged in the first dimension direction totally reflects the received reflected light beams out of the light exit surface of the dichroic mirror array 37. Thus, the plurality of beam splitting prisms 371 are configured to amplify the incident light beam emitted from the optical waveguide eyepiece 31 in the first dimension direction, then emit the light beam from the light emitting surface of the beam splitting mirror array 37, enter the optical waveguide substrate 32 through the light coupling region, and then amplify the light beam in the Z direction and emit the amplified light beam to the observation position 40 through the optical waveguide transmission of the optical waveguide substrate 32.

It should be noted that, the number of the beam splitting prism groups in the beam splitter array 37 is not limited to one, please refer to fig. 4, the beam splitter array 37 includes two beam splitting prism groups symmetrically arranged along the first dimension, each beam splitting prism group includes a plurality of beam splitting prisms 371 sequentially arranged along the first dimension toward one direction, the beam splitting prisms 371 of the two beam splitting prism groups that receive the incident light beam emitted after being aligned by the optical waveguide eyepiece are attached, and the principles of transmission and reflection of the beam are the same as those described above, which are not repeated herein, so that the incident light beam emitted after being aligned by the optical waveguide eyepiece 31 is amplified simultaneously toward two sides in the direction of the first dimension at the middle position aligned with the optical waveguide eyepiece 31.

In some embodiments, the optical system includes the sighting mark assembly 20 and the two-dimensional pupil expansion module, as shown in fig. 5, so that the optical system can achieve the purpose of realizing more-dimensional pupil expansion on the basis of effectively reducing the design and manufacturing difficulty of the optical waveguide assembly 39 by arranging the foldback lens group 115 to maintain the excellent optical axis length and arranging the optical waveguide assembly 39 to realize the pupil expansion function by using the optical waveguide transmission and simultaneously completing the fusion of the multi-channel optical signals by using the optical waveguide transmission, so that the optical system further has the red point sighting function and is combined with the beam splitter array 37 by means of the optical waveguide assembly 39.

In another aspect of the embodiments of the present application, a combined aiming system is provided, including an optical aiming device and an optical system of the embodiments of the present application. The optical system can be used as a front sighting telescope accessory of the optical sighting device and is assembled on the body of the optical sighting device to provide a precise sighting function.

Alternatively, the optical sighting device may be various devices that require the observation of a particular target within the field of view of the target by using imaging, such as a shooting device, telescope, thermal infrared imager, etc. Taking a shooting device as an example, the front sighting telescope is arranged on the shooting device, the muzzle of the shooting device points to the center of a field of view in an imaging light path in the optical system, the observation position 40 is arranged on the near-eye display device, human eyes can directly observe a fusion image of multi-channel optical signals formed by the optical system, and the sighting is realized based on the fact that the position of a sighting mark optical signal in the fusion image of the multi-channel optical signals is consistent with the position of the muzzle of the shooting device corresponding to a real environment. When shooting the target, the user can adjust the angle of the shooting device, and then adjust the muzzle aiming target of the shooting device by aiming the image formed by the target aiming mark aiming target.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An optical system is characterized by comprising an optical entering module (11), an imaging module (16) and a pupil expanding visual module (30);

the light entering module (11) is used for collecting light signals in a target view field and converging the light signals to the imaging module (16); the light incident module (11) comprises a foldback lens group (115) and an objective lens (113), the foldback lens group (115) reflects incident light signals for multiple times to form a folding light path, the light signals are finally reflected to the objective lens (113), and the light signals are refracted and converged by the objective lens (113) and are emitted to the imaging module (16);

the imaging module (16) comprises an image processing unit (13) and a display module (14), wherein the image processing unit (13) is used for converting an optical signal into an image and displaying the image through the display module (14);

the pupil expansion visual module (30) comprises an optical waveguide assembly (39), the optical waveguide assembly (39) comprises an optical coupling-in area (33) and an optical coupling-out area (34) which respectively correspond to the display module (14) and the observation position (40), the image displayed in the display module (14) is incident to the optical coupling-in area (33) in the form of an optical signal, is transmitted to the optical coupling-out area (34) through the optical waveguide assembly (39), and is coupled to the observation position (40) through the optical coupling-out area (34).

2. The optical system according to claim 1, wherein the refractive lens group (115) comprises a primary mirror (111) and a secondary mirror (112); the secondary mirror (112), the primary mirror (111) and the objective lens (113) are sequentially arranged along the incident direction of the optical signal;

the main mirror (111) comprises a light incident portion (1113) and a light transmitting portion (1114), the light incident portion (1113) receives an incident light signal and reflects the incident light signal to the sub-mirror (112), the sub-mirror (112) reflects the light signal reflected by the light incident portion (1113) to the light transmitting portion (1114), and the light signal passes through the light transmitting portion (1114) and is then emitted to the objective lens (113).

3. An optical system according to claim 2, wherein the primary mirror (111) is larger in size than the secondary mirror (112) in the radial direction, and a portion of the primary mirror (111) larger in the radial direction than the secondary mirror (112) is formed as the light entering portion (1113).

4. The optical system according to claim 2, wherein the primary mirror (111) and the secondary mirror (112) are both curved lenses, the side of the primary mirror (111) facing the incoming optical signal being concave, the side of the secondary mirror (112) facing the primary mirror (111) being convex;

the light transmitting portion (1114) includes a perforation aligned with the sub-mirror (112) and the objective lens (113) in the optical axis direction, the perforation having a size smaller than or equal to the sub-mirror (112).

5. The optical system according to claim 1, wherein the optical waveguide assembly (39) comprises an optical waveguide eyepiece (31) and an optical waveguide substrate (32), the light incoupling region (33) and the light outcoupling region (34) being formed at opposite ends of the optical waveguide substrate (32), respectively, the optical waveguide eyepiece (31) being located in front of the light incoupling region (33) for amplifying and converting an optical signal of the image displayed in the display module (14) into a parallel optical signal.

6. The optical system of claim 5, further comprising an aiming mark assembly (20), the aiming mark assembly (20) comprising a combiner (22) and an aiming mark light source (21); the light converging lens (22) is arranged between the display module (14) and the optical waveguide ocular (31) and comprises a first light incident surface and a second light incident surface which face the display module (14) and the aiming mark light source (21), the image displayed in the display module (14) is emitted to the first light incident surface in the form of light signals, the image is transmitted through the light converging lens (22) and emitted to the optical waveguide ocular (31), and the aiming mark light signals emitted by the aiming mark light source (21) are emitted to the second light incident surface, reflected by the second light incident surface and emitted to the optical waveguide ocular (31).

7. The optical system of claim 6, wherein an incidence direction of the optical signal of the image to the first light incident surface and an incidence direction of the aiming mark optical signal to the second light incident surface are perpendicular to each other.

8. The optical system of claim 1, further comprising an in-coupling region corresponding to the out-coupling region (34), the out-coupling region (34) for transmission of an optical signal entering from the in-coupling region therethrough such that the image of the target field of view formed by the imaging module (16) is observed at the observation site while the target field of view is directly observable through the out-coupling region (34) and the in-coupling region.

9. The optical system of claim 1, wherein the optical signal is an infrared optical signal or a visible optical signal.

10. A combined targeting system comprising an optical targeting device and an optical system according to any one of claims 1 to 9.