CN219162478U - Binocular night vision device - Google Patents
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- CN219162478U CN219162478U CN202221802677.3U CN202221802677U CN219162478U CN 219162478 U CN219162478 U CN 219162478U CN 202221802677 U CN202221802677 U CN 202221802677U CN 219162478 U CN219162478 U CN 219162478U
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Abstract
The application discloses binocular night vision device, this binocular night vision device includes: the low-light night vision module is used for generating a low-light image based on a target scene; a thermal imaging module for generating a thermal imaging image based on the target scene; the light splitting system is arranged on the transmission path of the low-light image and the thermal imaging image, one of the low-light image and the thermal imaging image is decomposed into a first sub-image and a second sub-image, the light splitting system further projects the first sub-image to a first human eye of a user, and the second sub-image is combined with the other one of the low-light image and the thermal imaging image and then projected to a second human eye of the user. The utility model provides a through shimmer night vision module and thermal imaging module generate shimmer image and thermal imaging image respectively, realize two light paths independent imaging, and make one of two images throw in first human eye through beam splitting system, two images merge and throw in the second human eye, avoid the mutual interference between the light path formation of image through the mode of physics integration, realize the effect of binocular observation simultaneously.
Description
Technical Field
The application relates to the technical field of night vision devices, in particular to a binocular night vision device.
Background
The night vision device is an important device for people to move at night, has extremely important roles in military and civil aspects, and the mature passive night vision technology is divided into a low-light imaging tube technology and an infrared thermal imaging technology, can observe a target and well hide the target, and is widely applied to various fields.
The night vision device in the prior art comprises a low-light imaging tube night vision device, a thermal imaging night vision device and a low-light thermal image fusion night vision device. The low-light imaging tube night vision device uses natural night lights such as night light such as weak moon light, starlight, atmosphere glow and Galaxy light at night as illumination, and amplifies and converts weak photons reflected by a target into visible images by means of the light amplifier so as to realize a night observation instrument, and the imaging is clear. The low-light image-increasing tube night vision device is suitable for most scenes, but can not be distinguished when the reflectivity of a target is close to that of a background, and can not be imaged in a dark environment, and light supplementing is needed, but the light supplementing increases the found probability.
The thermal imaging night vision device uses a thermal imaging technology, wherein the thermal imaging technology is that an infrared detector and an optical imaging objective lens are utilized to receive infrared radiation energy distribution patterns of a detected target and reflect the infrared radiation energy distribution patterns on a photosensitive element of the infrared detector, so that an infrared thermal image is obtained, imaging can be carried out in a dark and rainy fog environment, and the image contrast is high. However, the thermal imaging night vision device is easily deceived by the infrared camouflage net, and when the thermal imaging night vision device encounters a medium capable of reflecting heat, such as glass or water surface, a virtual image or a target is isolated and cannot be imaged, so that the imaging definition of the thermal imaging night vision device is low.
The low-light thermal image fusion night vision devices in the prior art are monocular night vision devices, and when the monocular night vision devices are used for observation for a long time, the problem that the eyes of a working observer are tired and uncomfortable easily occurs, so that the observation resolution is affected.
Disclosure of Invention
The application provides a binocular night vision device, this binocular night vision device includes:
the low-light night vision module is used for generating a low-light image based on a target scene;
a thermal imaging module for generating a thermal imaging image based on the target scene;
the light splitting system is arranged on the transmission path of the low-light image and the thermal imaging image, one of the low-light image and the thermal imaging image is decomposed into a first sub-image and a second sub-image, the light splitting system further projects the first sub-image to a first human eye of a user, and the second sub-image is combined with the other one of the low-light image and the thermal imaging image and then projected to a second human eye of the user.
Optionally, the light splitting system includes a first light splitting prism and a second light splitting prism, the first light splitting lens is used for receiving one of the low-light image and the thermal imaging image, decomposing the one of the low-light image and the thermal imaging image into a first sub-image and a second sub-image, and projecting the first sub-image to a first human eye of a user, and the second light splitting prism receives the second sub-image and the other of the low-light image and the thermal imaging image, and projects the two to a second human eye of the user after combining.
Alternatively, the transmission path of the microimage and the transmission path of the thermographic image are arranged side by side,
the first light-splitting prism is provided with a first light-splitting interface, one of the micro-light image and the thermal imaging image is reflected by the first light-splitting interface to form a first sub-image, the first sub-image is transmitted by the first light-splitting interface to form a second sub-image, and the first sub-image is reflected to the first human eye after being transmitted in the first light-splitting prism along a first distance away from the transmission path of the other one of the micro-light image and the thermal imaging image;
the second light splitting prism is provided with a second light splitting interface, the second sub-image is incident on the second light splitting prism, the second sub-image is reflected to the second human eye by the second light splitting interface after being transmitted in the second light splitting prism along the direction of the transmission path of the other one of the glimmer image and the thermal imaging image, and the other one of the glimmer image and the thermal imaging image is transmitted to the second human eye through the second light splitting interface.
Alternatively, the first sub-image is transmitted in the first beam splitting prism in a total reflection manner and the second sub-image is transmitted in the second beam splitting prism in a total reflection manner.
Optionally, the first beam splitter prism and the second beam splitter prism partially overlap along a direction of interval of the transmission path of the microimage and the transmission path of the thermal imaging image, and the second sub-image is incident from the first beam splitter prism into the second beam splitter prism in a normal incidence manner.
Optionally, the first light splitting prism includes a first main surface, a second main surface, and a first total reflection surface, the first main surface and the second main surface are parallel to each other, the first light splitting interface and the first total reflection surface are obliquely disposed with respect to the first main surface and the second main surface, one of the low-light-level image and the thermal imaging image is incident through the first main surface in a normal incidence manner, the first sub-image is transmitted between the first main surface and the second main surface in a total reflection manner, and is reflected to the first human eye through the first total reflection surface, and the second sub-image is emergent through the second main surface in a normal incidence manner;
the second light-splitting prism includes a third main surface, a fourth main surface, and a second total reflection surface, the third main surface and the fourth main surface being disposed parallel to each other, the second light-splitting interface and the second total reflection surface being disposed obliquely with respect to the third main surface and the fourth main surface, the second sub-image being incident through the third main surface in a normal incidence manner, and being transmitted between the third main surface and the fourth main surface in a total reflection manner after being reflected by the second total reflection surface, the other of the low-light image and the thermal imaging image being incident through the third main surface in a normal incidence manner, and being emitted through the fourth main surface.
Optionally, the low-light night vision module comprises:
a first objective lens for converging a first target ray in a target scene;
the image intensifier is used for amplifying the converged first target light to obtain a low-light image;
and the field lens is used for adjusting the magnification of the low-light-level image.
Optionally, the thermal imaging module comprises:
a second objective lens for converging a second target ray of the target scene;
the image acquisition unit is used for carrying out image acquisition on the converged second target light rays so as to obtain a thermal imaging image;
and the display screen is used for displaying the thermal imaging image.
Optionally, the thermal imaging module further includes an adjusting lens disposed between the display screen and the second beam splitter prism for adjusting an image size of the thermal imaging image.
Optionally, one of the glimmer image and the thermographic image is a glimmer image.
The beneficial effects of this application are: compared with the prior art, the low-light-level night vision module and the thermal imaging module are used for respectively generating the low-light-level image and the thermal imaging image, two-beam light-path independent imaging is achieved, one of the low-light-level image and the thermal imaging image is projected to the first human eye of a user through the light splitting system, the low-light-level image and the thermal imaging image are combined and projected to the second human eye of the user, mutual interference between light-path imaging is avoided through a physical fusion mode, and real observation imaging is achieved. Meanwhile, the effect of binocular observation is realized by independent imaging of the two light paths, wearing comfort can be effectively improved, and user observation fatigue is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of a binocular night vision device of the present application;
fig. 2 is a schematic structural diagram of an embodiment of the spectroscopic system in fig. 1.
Detailed Description
For better understanding of the technical solutions of the present application, the binocular night vision device provided in the present application is described in further detail below with reference to the accompanying drawings and the detailed description. It is to be understood that the described embodiments are merely some, but not all embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms "first," "second," and the like in this application are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The application provides a binocular night vision device 1 adopts binocular monocular overall arrangement, realizes the physical fusion technique of shimmer and thermal imaging on optical structure, exerts the respective advantage of two kinds of techniques, mutually makes up for the shortfall, and does not influence the instantaneity of observation, can effectively improve target observation resolution capability.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a binocular night vision device of the present application. As shown in fig. 1, the binocular night vision device 1 includes a low-light night vision module 10, a thermal imaging module 20, a spectroscopic system 30, and an eyepiece system 50.
The low-light night vision module 10 is configured to generate a low-light image based on a target scene, the thermal imaging module 20 is configured to generate a thermal imaging image based on the target scene, the spectroscopic system 30 is further disposed on a transmission path of the low-light image and the thermal imaging image, and decomposes one of the low-light image and the thermal imaging image into a first sub-image and a second sub-image, the spectroscopic system 30 further projects the first sub-image to a first human eye of a user, and the second sub-image and the other of the low-light image and the thermal imaging image are combined and then projected to a second human eye of the user.
Specifically, the eyepiece system 50 includes a first eyepiece 51 and a second eyepiece 52, the spectroscopic system 30 transmits the first sub-image to the first eyepiece 51, the first eyepiece 51 in turn projects the first sub-image to a first human eye of the user, the spectroscopic system 30 combines the second sub-image with the other of the low-light image and the thermal imaging image and transmits the combined image to the second eyepiece 52, and the second eyepiece 52 in turn projects the combined image to a second human eye of the user.
Optionally, in the present embodiment, one of the glimmer image and the thermal imaging image is a glimmer image. That is, the spectroscopic system 30 decomposes the microimage into a first sub-image and a second sub-image to project the first sub-image to the first eye of the user, and combines the second sub-image and the thermal image to project the combined second sub-image to the second eye of the user.
Alternatively, the first eye corresponding to the first eyepiece 51 may be a right eye, and the second eye corresponding to the second eyepiece 52 may be a left eye; alternatively, the first eye corresponding to the first eyepiece 51 may be a left eye and the second eye corresponding to the second eyepiece 52 may be a right eye.
As shown in fig. 1, the low-light night vision module 10 includes a first objective lens 11, an image intensifier 12, and a field lens 13. The low-light night vision module 10 is configured to generate a low-light image based on a target scene, specifically, by acquiring a first target light in the target scene to generate the low-light image, where the first objective 11, the image intensifier 12, and the field lens 13 are sequentially disposed on a transmission path of the first target light.
Specifically, the first objective lens 11 is used for converging the first target light in the target scene, the image intensifier 12 is used for amplifying the converged first target light to obtain a low-light-level image, and the field lens 13 is used for adjusting the magnification of the low-light-level image.
As shown in fig. 1, the thermal imaging module 20 includes a second objective lens 21, an image pickup unit 22, and a display screen 23. The thermal imaging module 20 is configured to generate a thermal imaging image based on a target scene, specifically, by acquiring a second target light in the target scene to generate the thermal imaging image, where the second objective lens 21, the image acquisition unit 22, and the display screen 23 are sequentially disposed on a transmission path of the second target light.
Specifically, the second objective lens 21 is configured to converge the second target light of the target scene, the image capturing unit 22 is configured to perform image capturing on the converged second target light to obtain a thermal imaging image, and the display screen 23 is configured to display the thermal imaging image. Optionally, the display 23 is embodied as a micro display.
Further, the thermal imaging module 20 further includes an adjusting lens 24, where the adjusting lens 24 is disposed between the display screen 23 and the spectroscopic system 30, for adjusting the image size of the thermal imaging image.
Optionally, in this embodiment, the transmission path of the low-light level image and the transmission path of the thermal imaging image are arranged side by side, that is, the transmission paths of the first target light and the second target light are parallel to each other, and the low-light level night vision module 10 and the thermal imaging module 20 are arranged side by side, so that two light paths are formed independently, that is, the definition of the low-light level night vision device in the prior art is maintained, and the high contrast of the thermal imaging night vision device in the prior art is also maintained, and meanwhile, the observation requirement can be met even under the condition of no light. In addition, the embodiment combines the glimmer image and the thermal imaging image through the light splitting system 30, and realizes the fusion of the glimmer image and the thermal imaging image in a physical fusion mode, so that the mutual interference between the imaging of the optical paths is avoided, the actual observation imaging can be realized, and the observation fatigue and discomfort caused by long-time observation by using the monocular night vision device are reduced.
Meanwhile, the distance from the binocular night vision device 1 to the imaging side along the direction from the light acquisition side is reduced by the arrangement of the low-light night vision module 10 and the thermal imaging module 20, specifically, the distance from the binocular night vision device 1 to the imaging side along the direction from the light acquisition side is smaller than 105mm, and then the gravity center of the binocular night vision device 1 moves to the side of a user, namely, the center offset is shortened, so that the binocular night vision device 1 is not easy to drop when the user wears the binocular night vision device 1, and the wearing comfort of the user is improved.
Further, in this embodiment, by optimizing parameters such as the focal length of the first objective lens 11, the focal length of the second objective lens 21, the size of the display screen 23, and the focal length of the adjusting lens 24, the overlap ratio of the images formed by the low-light-level image and the thermal imaging image after passing through the second eyepiece 52 is infinitely close to 1, so as to further ensure the fusion effect of the images. Meanwhile, the first objective lens 11 and the second objective lens 21 can be adjusted to observe targets with different distances, so that imaging is clearer.
Referring to fig. 2 in conjunction with fig. 1, fig. 2 is a schematic structural diagram of an embodiment of the spectroscopic system in fig. 1. As shown in fig. 2, the spectroscopic system 30 includes a first spectroscopic prism 31 and a second spectroscopic prism 32. The first prism 31 is configured to receive one of the low-light image and the thermal imaging image, decompose one of the low-light image and the thermal imaging image into a first sub-image and a second sub-image, and project the first sub-image to a first human eye of a user, and the second prism 32 receives the second sub-image and the other of the low-light image and the thermal imaging image, and projects the two images to a second human eye of the user after combining.
Specifically, the first light-splitting prism 31 has a first light-splitting interface 311, a first total reflection surface 312, a first main surface 313, and a second main surface 314. Wherein the first main surface 313 and the second main surface 314 are disposed parallel to each other, and the first light-splitting interface 311 and the first total reflection surface 312 are disposed obliquely with respect to the first main surface 313 and the second main surface 314.
One of the low-light image and the thermal imaging image is incident through the first main surface 313 in a normal incidence mode, and one of the low-light image and the thermal imaging image is reflected through the first light splitting interface 311 to form a first sub-image, and is transmitted through the first light splitting interface 311 to form a second sub-image, and the second sub-image is emergent through the second main surface 314 in a normal incidence mode.
The first sub-image is reflected to the first human eye after being transmitted a first distance in the first beam splitter prism 31 in a direction away from the transmission path of the other of the microimage and the thermographic image. The first sub-image is transmitted in the first beam splitter prism 31 in a total reflection manner, specifically, the first sub-image is transmitted between the first main surface 313 and the second main surface 314 in a total reflection manner, and is reflected to the first human eye by the first total reflection surface 312, and the first distance is a distance between the center of the first beam splitter interface 311 and the center of the first total reflection surface 312 in a direction perpendicular to the transmission path of the microimage.
The second light-splitting prism 32 has a second light-splitting interface 321, a second total reflection surface 322, a third main surface 323, and a fourth main surface 324. Wherein the third main surface 323 and the fourth main surface 324 are disposed parallel to each other, and the second light splitting interface 321 and the second total reflection surface 322 are disposed obliquely with respect to the third main surface 323 and the fourth main surface 324.
The second sub-image is incident on the second prism 32, specifically, the second sub-image is incident on the second prism 32 from the first prism 31 in a normal incidence manner. The second sub-image is reflected by the second light splitting interface 321 to the second human eye after being transmitted a second distance in the second light splitting prism 32 in a direction toward the transmission path of the other of the low-light image and the thermal imaging image.
Alternatively, the first and second dichroic prisms 31 and 32 are partially overlapped in the interval direction of the transmission path of the microimage and the transmission path of the thermal imaging image, so that the second sub-image exiting through the second main surface 314 in the normal incidence manner is again incident from the first dichroic prism 31 into the second dichroic prism 32 in the normal incidence manner.
The second sub-image is transmitted in the second dichroic prism 32 in a total reflection manner, specifically, the second sub-image is incident through the third main surface 323 in a normal incidence manner, and is transmitted between the third main surface 323 and the fourth main surface 324 in a total reflection manner after being reflected by the second total reflection surface 322, and the second distance is a distance between the center of the second dichroic interface 321 and the center of the second total reflection surface 322 in a direction perpendicular to the transmission path of the microimage.
Meanwhile, the other of the low-light image and the thermal imaging image is transmitted to the second human eye through the second light splitting interface 321. Specifically, the other of the microoptical image and the thermal imaging image is incident through the third main surface 323 in normal incidence, and exits through the fourth main surface 324.
As shown in fig. 1, the binocular night vision device 1 further includes a control unit 40 and at least one auxiliary light source disposed around the image intensifier 12, where the at least one auxiliary light source is used for supplementing the low-light level night vision module 10 when the binocular night vision device 1 needs to supplement light.
The control unit 40 is connected to the image intensifier 12, the image capturing unit 22, the display screen 23 and at least one auxiliary light source, so as to control the power-up of the image intensifier 12, the image capturing unit 22, the display screen 23 and the at least one auxiliary light source. Specifically, the control unit 40 controls the operating voltage and/or the operating current of the at least one auxiliary light source to control the light intensity of the supplementary light outputted from the at least one auxiliary light source.
The foregoing is only examples of the present application, and is not intended to limit the scope of the patent application, and all equivalent structures or equivalent processes using the descriptions and the contents of the present application or other related technical fields are included in the scope of the patent application.
Claims (10)
1. A binocular night vision device, characterized in that it comprises:
the low-light night vision module is used for generating a low-light image based on a target scene;
a thermal imaging module for generating a thermal imaging image based on the target scene;
the light splitting system is arranged on the transmission paths of the low-light-level image and the thermal imaging image, one of the low-light-level image and the thermal imaging image is decomposed into a first sub-image and a second sub-image, the light splitting system further projects the first sub-image to a first human eye of a user, and the second sub-image is combined with the other one of the low-light-level image and the thermal imaging image and then projected to a second human eye of the user.
2. The binocular night vision device of claim 1, wherein the light splitting system comprises a first light splitting prism and a second light splitting prism, the first light splitting lens is configured to receive one of the low-light image and the thermal imaging image, split the one of the low-light image and the thermal imaging image into a first sub-image and a second sub-image, and project the first sub-image to a first human eye of a user, and the second light splitting prism is configured to receive the second sub-image and the other of the low-light image and the thermal imaging image, and combine the two and project the combined two to a second human eye of the user.
3. Binocular night vision device according to claim 2, characterized in that the transmission path of the microimage and the transmission path of the thermographic image are arranged side by side,
the first light-splitting prism is provided with a first light-splitting interface, one of the low-light-level image and the thermal imaging image is reflected by the first light-splitting interface to form a first sub-image, the first sub-image is transmitted by the first light-splitting interface to form a second sub-image, and the first sub-image is reflected to the first human eye after being transmitted in the first light-splitting prism for a first distance along a direction deviating from a transmission path of the other one of the low-light-level image and the thermal imaging image;
the second light splitting prism is provided with a second light splitting interface, the second sub-image is incident to the second light splitting prism, the second sub-image is reflected to the second human eye by the second light splitting interface after being transmitted by a second distance in the second light splitting prism along the direction of the transmission path of the other one of the low-light-level image and the thermal imaging image, and the other one of the low-light-level image and the thermal imaging image is transmitted to the second human eye through the second light splitting interface.
4. A binocular night vision device according to claim 3, wherein the first sub-image is transmitted in the first beam splitting prism in a total reflection manner and the second sub-image is transmitted in the second beam splitting prism in a total reflection manner.
5. The binocular night vision device of claim 3, wherein the first and second beam splitting prisms partially overlap along a direction of separation of the transmission path of the microimage and the transmission path of the thermographic image, the second sub-image being incident from the first beam splitting prism into the second beam splitting prism at normal incidence.
6. The binocular night vision device of claim 3, wherein the first light splitting prism includes a first major surface, a second major surface, and a first total reflection surface, the first major surface and the second major surface being disposed parallel to each other, the first light splitting interface and the first total reflection surface being disposed obliquely with respect to the first major surface and the second major surface, one of the microimage and the thermographic image being incident through the first major surface at normal incidence, the first sub-image being transmitted between the first major surface and the second major surface at total reflection and being reflected to the first human eye via the first total reflection surface, the second sub-image being emitted through the second major surface at normal incidence;
the second light splitting prism includes a third main surface, a fourth main surface and a second total reflection surface, the third main surface and the fourth main surface are arranged in parallel with each other, the second light splitting interface and the second total reflection surface are arranged obliquely relative to the third main surface and the fourth main surface, the second sub-image is incident through the third main surface in a normal incidence mode and is transmitted between the third main surface and the fourth main surface in a total reflection mode after being reflected by the second total reflection surface, and the other one of the low-light image and the thermal imaging image is incident through the third main surface in a normal incidence mode and is emitted through the fourth main surface.
7. The binocular night vision device of claim 1, wherein the low-light night vision module comprises:
a first objective lens for converging a first target ray in the target scene;
the image intensifier is used for amplifying the converged first target light to obtain the low-light-level image;
and the field lens is used for adjusting the magnification of the low-light-level image.
8. The binocular night vision device of claim 2, wherein the thermal imaging module comprises:
a second objective lens for converging a second target ray of the target scene;
the image acquisition unit is used for acquiring the converged second target light to obtain the thermal imaging image;
and the display screen is used for displaying the thermal imaging image.
9. The binocular night vision device of claim 8, wherein the thermal imaging module further comprises an adjustment lens disposed between the display screen and the second light splitting prism for adjusting an image size of the thermal imaging image.
10. The binocular night vision device of claim 1, wherein one of the glimmer image and the thermographic image is the glimmer image.
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