Infrared lens and imaging device

Abstract

The utility model discloses an infrared lens which comprises a main lens barrel, a zooming assembly, a switching hand wheel, a rear lens barrel, a focusing assembly and a focusing shaft. The zoom assembly is movably arranged in the main lens barrel along the optical axis direction, and the zoom assembly partially extends out of the main lens barrel; the switching hand wheel is rotatably arranged on the outer side of the main lens cone and is in butt joint with the part, extending out of the main lens cone, of the zooming assembly so as to drive the zooming assembly to move in the rotating process; the rear lens cone is connected to the rear end of the main lens cone; the focusing assembly is movably arranged in the rear lens barrel in the direction of the optical axis; the focusing shaft is rotatably connected to the rear lens barrel and is in butt joint with the focusing assembly so as to drive the focusing assembly to move in the rotation process. According to the infrared lens, the switching hand wheel is rotated to drive the zooming assembly to move, zooming of the lens is achieved, and after zooming is completed, the focusing shaft drives the focusing assembly to move, so that focusing is conducted on the lens, and it is ensured that pictures are clear. The utility model further discloses an imaging device.

Description

Technical Field

[0001] This application belongs to the technical field of optical devices, and particularly relates to an infrared lens and an imaging device. Background Art

[0002] A dual-field-of-view infrared lens is an infrared lens with two different field-of-view angles, which can provide more comprehensive infrared image information at different distances and scenes. The design of this lens allows users to switch different field-of-view angles to adapt to different shooting scenarios and distance requirements, thereby improving the flexibility and applicability of the infrared imaging system.

[0003] Dual-field-of-view infrared lenses have important application values in the fields of military, security, aerospace, etc. because they can provide a wider monitoring range, improve detection efficiency and accuracy, and at the same time provide more comprehensive infrared image information in complex environments such as night monitoring, adverse weather conditions or long-distance monitoring, enhancing the response ability and security. However, the picture clarity of traditional dual-field-of-view infrared lenses is poor. Utility Model Content

[0004] The technical problem to be solved by this application is that the picture clarity of the existing dual-field-of-view lenses is poor. To solve the above technical problem, an infrared lens and an imaging device with dual fields of view and high picture clarity are provided.

[0005] The technical solution proposed by this application is as follows:

[0006] An infrared lens, comprising:

[0007] A main barrel;

[0008] A zoom component, movably arranged in the main barrel along the optical axis direction, and part of the zoom component extends out of the main barrel;

[0009] A switching handwheel, rotatably arranged outside the main barrel, and docked with the part of the zoom component extending out of the main barrel to drive the zoom component to move during rotation;

[0010] A rear barrel, connected to the rear end of the main barrel;

[0011] A focusing component, movably arranged in the rear barrel along the optical axis direction;

[0012] A focusing shaft, rotatably connected to the rear barrel, and docked with the focusing component to drive the focusing component to move during rotation.

[0013] Further, the infrared lens further includes a first lens and a second lens. The first lens is disposed within the main barrel and on the object side of the zoom component. The second lens is disposed within the rear barrel and on the object side of the focusing component.

[0014] Further, the zoom component includes a zoom barrel, a zoom dial, and a zoom lens. The zoom barrel is movably disposed within the main barrel along the optical axis direction. The zoom dial is connected to the zoom barrel and has one end extending out of the main barrel. The switching handwheel is docked with the end of the zoom dial extending out of the main barrel. The zoom lens is disposed within the zoom barrel.

[0015] Further, the zoom component further includes a compensation barrel. The compensation barrel is threadedly connected to the inside of the zoom barrel to adjust its position along the optical axis direction within the zoom barrel. The zoom lens is disposed within the compensation barrel.

[0016] Further, the focusing component includes a focusing barrel and a focusing lens. The focusing barrel is movably disposed within the rear barrel along the optical axis direction. The focusing shaft is docked with the focusing barrel. The focusing lens is disposed within the focusing barrel.

[0017] Further, the focusing component further includes a guide post and a focusing ring. Both the guide post and the focusing ring are connected to the outside of the focusing barrel.

[0018] The rear barrel is provided with a guide hole along the optical axis direction. The guide post extends into the guide hole. The focusing shaft is threadedly connected to the focusing ring.

[0019] Further, the focal length of the infrared lens is 25 - 50 mm.

[0020] The central thickness of the first lens is 4.89 mm, the central thickness of the zoom lens is 1.83 mm, the central thickness of the second lens is 4.38 mm, and the central thickness of the focusing lens is 2.79 mm.

[0021] The air gap between the first lens and the zoom lens is 14.18 - 21.39 mm, the air gap between the zoom lens and the second lens is 4 - 11.21 mm, and the air gap between the second lens and the focusing lens is 11.51 - 13.61 mm.

[0022] An imaging device includes the infrared lens as described above and a detector for receiving the image formed by the infrared lens.

[0023] Further, the detector includes a protection window and a detector focal plane arranged in sequence.

[0024] Furthermore, the detector has 640×512 pixels, with a pixel size of 12μm, an operating wavelength band of 8 - 12μm, and an F number of 0.88 - 1.1.

[0025] By using the above infrared lens, the zoom component is driven to move by rotating the switching handwheel to achieve zooming of the lens. After zooming is completed, the focusing component is driven to move by the focusing axis to focus the lens and ensure a clear image. Description of the Drawings

[0026] The drawings are used to provide a further understanding of the present application and form a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application.

[0027] Figure 1 It is a schematic cross-sectional structure diagram of an infrared lens provided by an embodiment of the present application;

[0028] Figure 2 is Figure 1 a schematic exploded structure diagram of the infrared lens shown;

[0029] Figure 3 It is a schematic lens structure diagram of an imaging device provided by another embodiment of the present application.

[0030] Reference Numeral Description:

[0031] 110, main lens barrel; 111, zoom hole; 120, zoom component; 121, zoom lens barrel; 122, zoom dial pin; 123, zoom lens; 124, compensation lens barrel; 131, switching handwheel; 132, zoom ring; 1321, zoom groove; 133, ball head plunger; 140, rear lens barrel; 141, guiding hole; 150, focusing component; 151, focusing lens barrel; 152, focusing lens; 153, guiding column; 154, focusing ring; 160, focusing axis; 171, front housing; 172, rear housing; 181, first lens; 182, second lens; 210, protection window; 220, detector focal plane. Detailed Embodiments

[0032] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0034] The present application provides an imaging device, which includes an infrared lens and a detector for receiving the image formed by the infrared lens.

[0035] Further, as Figure 1 and Figure 2 shown, the infrared lens includes a main barrel 110, a zoom component 120, a switching handwheel 131, a rear barrel 140, a focusing component 150 and a focusing shaft 160. The zoom component 120 is movably arranged in the main barrel 110 along the optical axis direction, and a part of the zoom component 120 extends out of the main barrel 110; the switching handwheel 131 is rotatably arranged outside the main barrel 110, and the part of the zoom component 120 extending out of the main barrel 110 is docked with the switching handwheel 131, so that the zoom component 120 is driven to move during the rotation of the switching handwheel 131, thereby realizing the zoom of the infrared lens.

[0036] The rear barrel 140 is connected to the rear end of the main barrel 110, that is, the rear end along the optical axis transmission direction; the focusing component 150 is movably arranged in the rear barrel 140 along the optical axis direction; the focusing shaft 160 is rotatably connected to the rear barrel 140 and is docked with the focusing component 150 to drive the focusing component 150 to move during rotation.

[0037] With the above infrared lens, the zoom of the lens is realized by driving the zoom component 120 to move by rotating the switching handwheel 131. After the zoom is completed, the focusing component 150 is driven to move by the focusing shaft 160, thereby focusing the lens to ensure a clear picture. In addition, the zoom component 120 and the focusing component 150 are respectively arranged in the main barrel 110 and the rear barrel 140. The main barrel 110 and the rear barrel 140 are connected by bolts and are detachable, which is convenient for later maintenance.

[0038] In one embodiment, the infrared lens further includes a front housing 171 and a rear housing 172. The front housing 171 is sleeved outside the main lens barrel 110, and the rear housing 172 is sleeved outside the rear lens barrel 140. The above-mentioned switching handwheel 131 is located between the front housing 171 and the rear housing 172 to improve the flatness of the infrared lens. In practical applications, the focusing shaft 160 is rotatably connected to the rear housing 172, and one end of the focusing shaft 160 extends from the rear end of the rear housing 172 for manual operation.

[0039] In one embodiment, the zoom component 120 includes a zoom lens barrel 121, a zoom dial 122 and a zoom lens 123. The zoom lens barrel 121 is movably arranged in the main lens barrel 110 along the optical axis direction. The zoom dial 122 is connected to the zoom lens barrel 121 and one end extends out of the main lens barrel 110. The switching handwheel 131 is docked with the end of the zoom dial 122 extending out of the main lens barrel 110, so as to drive the zoom lens barrel 121 to move during rotation. The zoom lens 123 is arranged in the zoom lens barrel 121, so as to realize zooming during the movement along with the zoom lens barrel 121.

[0040] Furthermore, the zoom component 120 further includes a compensation lens barrel 124. The compensation lens barrel 124 is threadedly connected to the inside of the zoom lens barrel 121 to adjust the position along the optical axis direction in the zoom lens barrel 121. The zoom lens 123 is arranged in the compensation lens barrel 124. In this way, the compensation lens barrel 124 can be rotated according to the actual situation before assembly to realize fine adjustment of the position of the zoom lens 123. After the fine adjustment is completed, the compensation lens barrel 124 and the zoom lens barrel 121 can be fixed by gluing between the compensation lens barrel 124 and the zoom lens barrel 121, or by other means, to avoid displacement of the compensation lens barrel 124 during later use and affect the picture clarity.

[0041] In one embodiment, the infrared lens further includes a zoom ring 132. The zoom ring 132 is fixedly connected to the switching handwheel 131 and is docked with the end of the zoom dial 122 extending out of the main lens barrel 110. In practical applications, the main lens barrel 110 is provided with a strip-shaped zoom hole 111 along the optical axis direction. The zoom ring 132 is provided with a zoom groove 1321. The zoom groove 1321 extends along the circumferential and axial directions of the zoom ring 132. In the axial direction of the zoom ring 132 and the optical axis direction, the zoom dial 122 extends out of the zoom hole 111 and enters the zoom groove 1321, so as to drive the zoom lens barrel 121 to move along the optical axis direction during the rotation of the zoom ring 132.

[0042] In one embodiment, the infrared lens further includes a ball plunger 133, which is disposed on the zoom ring 132. The main lens barrel 110 is provided with a positioning hole. During the rotation of the zoom ring 132, it can pass through a fixed position. When the zoom ring 132 rotates to the fixed position, the ball plunger 133 can extend into the positioning hole, thereby fixing the zoom ring 132 relative to the main lens barrel 110. Further, the number of positioning holes is two, and the two positioning holes are arranged at intervals along the circumferential direction of the main lens barrel 110 to correspond to the two fixed positions of the zoom ring 132.

[0043] It should be explained that the zoom ring 132 actually rotates between two fixed positions. That is, when the zoom ring 132 rotates from one fixed position to another fixed position, the zoom shift pin 122 can complete the zooming and realize the switching of the field of view. At the same time, if the zoom ring 132 rotates to one of the fixed positions, an external force can be applied to rotate the zoom ring 132 at this time, so that the ball plunger 133 disengages from the positioning hole, thereby realizing the rotation of the zoom ring 132 to another fixed position.

[0044] In one embodiment, the focusing assembly 150 includes a focusing lens barrel 151 and a focusing lens 152. The focusing lens barrel 151 is movably disposed in the rear lens barrel 140 along the optical axis direction. The focusing shaft 160 is docked with the focusing lens barrel 151, and the focusing lens 152 is disposed in the focusing lens barrel 151.

[0045] Further, the focusing assembly 150 further includes a guide post 153 and a focusing ring 154. The rear lens barrel 140 is provided with a guide hole 141 along the optical axis direction. The guide post 153 extends into the guide hole 141 to guide the movement of the focusing lens barrel 151. The focusing ring 154 is sleeved on the outer side of the rear lens barrel 140 and is connected to the guide post 153, so as to realize synchronous movement with the focusing lens barrel 151 in the rear lens barrel 140. The focusing shaft 160 is threadedly connected to the focusing ring 154, so as to drive the focusing lens barrel 151 to move along the optical axis direction during rotation. In practical applications, the focusing ring 154 is provided with a connection hole, and one end of the guide post 153 extends into the connection hole, thereby realizing the connection between the focusing lens barrel 151 and the focusing ring 154.

[0046] In one embodiment, the infrared lens further includes a first lens 181 and a second lens 182. The first lens 181 is disposed in the main lens barrel 110 and is located on the object side of the zoom assembly 120. The second lens 182 is disposed in the rear lens barrel 140 and is located on the object side of the focusing assembly 150. Combined Figure 3It can be known that the first lens 181, the zoom lens 123, the second lens 182, and the focusing lens 152 are arranged in sequence along the optical axis transmission direction, and are all fixed in the corresponding lens barrel by retaining rings. In addition, the detector includes a protective window 210 and a detector focal plane 220 arranged in sequence. In addition, the number of pixels of this detector is 640×512, the pixel size is 12μm, the working wavelength band is 8 - 12μm, and the F number is 0.88 - 1.1.

[0047] Please continue to refer to Figure 3 As well as Table 1, the air gap between the first lens 181 and the zoom lens 123 is 14.18 - 21.39mm; the air gap between the zoom lens 123 and the second lens 182 is 4 - 11.21mm; the air gap between the second lens 182 and the focusing lens 152 is 11.51 - 13.61mm, and the air gap between the focusing lens 152 and the protective window 210 is 14.4 - 16.5mm. In other words, the moving distance of the zoom lens 123 is 7.21mm, and the adjustment distance of the focusing lens 152 is 2.1mm. It should be noted that in this embodiment, the infrared lens has two fields of view, one of which has a focal length of 25mm, and the other has a focal length of 50mm.

[0048] Specifically, when the focal length of the infrared lens is 25mm, the air gap between the first lens 181 and the zoom lens 123 is 14.18mm; when the focal length of the infrared lens is 50mm, the air gap between the first lens 181 and the zoom lens 123 is 21.39mm. In other words, when it is necessary to switch the focal length of the infrared lens from 25mm to 50mm, it is necessary to drive the zoom lens barrel 121 to move backward along the optical axis transmission direction by switching the handwheel 131.

[0049] In addition, it should be explained that the focusing lens 152 is mainly used to adjust the picture clarity. After the zoom lens 123 moves to the corresponding position, the position of the focusing lens 152 is adjusted through the focusing shaft 160 until the picture is clear.

[0050] In Figure 3 In the illustrated embodiment, the central thickness of the first lens 181 is 4.89mm, the central thickness of the zoom lens 123 is 1.83mm, the central thickness of the second lens 182 is 4.38mm, and the central thickness of the focusing lens 152 is 2.79mm. It can be understood that in Figure 3 , along the optical axis direction from left to right, the left side is the object side, and the right side is the image side. For example, the S1 surface of the first lens 181 is the object side surface, and the S2 surface is the image side surface. The same applies to other lenses and will not be elaborated here.

[0051] Table 1

[0052]

[0053] In summary, the infrared lens and imaging device provided by the present application have at least the following advantages:

[0054] 1. By rotating the switching handwheel 131 to drive the zoom component 120 to move, the zoom of the lens is realized. After the zoom is completed, the focusing component 150 is driven to move by the focusing shaft 160, so as to focus the lens and ensure a clear picture;

[0055] 2. It is more convenient to realize zooming by rotating the switching handwheel 131;

[0056] 3. By arranging the ball head plunger 133 on the zoom ring 132 and opening a positioning hole on the main lens barrel 110, the accuracy of double-field-of-view switching in place is realized;

[0057] 4. By arranging the compensation lens barrel 124, the adjustability is improved;

[0058] 5. The zoom component 120 and the focusing component 150 are respectively arranged in two lens barrels, which is convenient for maintenance.

[0059] Although the embodiments of the present application have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An infrared lens, characterized in that, Comprising: A main lens barrel; A zoom component, movably arranged in the main lens barrel along the optical axis direction, and a part of the zoom component extends out of the main lens barrel; A switching handwheel, rotatably arranged outside the main lens barrel, and docked with the part of the zoom component extending out of the main lens barrel to drive the zoom component to move during rotation; A rear lens barrel, connected to the rear end of the main lens barrel; A focusing component, movably arranged in the rear lens barrel along the optical axis direction; A focusing shaft, rotatably connected to the rear lens barrel and docked with the focusing component to drive the focusing component to move during rotation.

2. The infrared lens according to claim 1, characterized in that The infrared lens further includes a first lens and a second lens. The first lens is arranged in the main lens barrel and on the object side of the zoom component, and the second lens is arranged in the rear lens barrel and on the object side of the focusing component.

3. The infrared lens according to claim 2, characterized in that The zoom component includes a zoom lens barrel, a zoom pin and a zoom lens. The zoom lens barrel is movably arranged in the main lens barrel along the optical axis direction. The zoom pin is connected to the zoom lens barrel and one end extends out of the main lens barrel. The switching handwheel is docked with the end of the zoom pin extending out of the main lens barrel; the zoom lens is arranged in the zoom lens barrel.

4. The infrared lens according to claim 3, wherein, The zoom component further includes a compensation lens barrel, which is threadedly connected inside the zoom lens barrel to adjust its position along the optical axis direction in the zoom lens barrel, and the zoom lens is arranged in the compensation lens barrel.

5. The infrared lens according to claim 3, characterized in that, The focusing component includes a focusing lens barrel and a focusing lens. The focusing lens barrel is movably arranged in the rear lens barrel along the optical axis direction. The focusing shaft is docked with the focusing lens barrel, and the focusing lens is arranged in the focusing lens barrel.

6. The infrared lens according to claim 5, characterized in that, The focusing component further includes a guide post and a focusing ring, both of which are connected to the outside of the focusing lens barrel; The rear lens barrel is provided with a guide hole along the optical axis direction, and the guide post extends into the guide hole; the focusing shaft is threadedly connected to the focusing ring.

7. The infrared lens according to claim 5, wherein The focal length of the infrared lens is 25 - 50 mm; The central thickness of the first lens is 4.89 mm, the central thickness of the zoom lens is 1.83 mm, the central thickness of the second lens is 4.38 mm, and the central thickness of the focusing lens is 2.79 mm; The air gap between the first lens and the zoom lens is 14.18 - 21.39 mm, the air gap between the zoom lens and the second lens is 4 - 11.21 mm, and the air gap between the second lens and the focusing lens is 11.51 - 13.61 mm.

8. An imaging device, characterized in that, Comprising the infrared lens according to any one of claims 1 - 7 and a detector for receiving the image formed by the infrared lens.

9. The imaging device according to claim 8, characterized in that, The detector includes a protection window and a detector focal plane arranged in sequence.

10. The imaging device according to claim 8, wherein The number of pixels of the detector is 640×512, the pixel size is 12 μm, the working band is 8 - 12 μm, and the F number is 0.88 - 1.1.

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