Real-time zooming structure of infrared camera

Abstract

The utility model discloses a real-time zooming structure of an infrared camera, which relates to the technical field of infrared cameras, and comprises a base, a front lens assembly, a zoom lens assembly, a compensating lens assembly and a correction lens assembly, and the front lens assembly is fixed at the front end of the base through a screw; the zoom lens assembly is fixed at the rear end of the side wall of the base through a screw; the compensating mirror assembly is fixed to the middle end of the bottom of the base through a screw. The correction lens assembly is fixed to the rearmost end of the bottom of the base through a screw. The front lens assembly, the zoom lens assembly, the compensation lens assembly and the correction lens assembly are arranged on the same optical axis. The zoom lens assembly comprises a zoom lens, one end of the zoom lens is connected with a guide rail sliding block, the guide rail sliding block can move along a rolling guide rail, and the rolling guide rail is installed on the base. According to the utility model, accurate and continuous zooming of the infrared camera is realized, the zooming efficiency is high, the image is stable in the zooming process, and the zoomed image is clear and has no ghost shadow.

Description

TECHNICAL FIELD

[0001] The utility model relates to infrared camera technical field especially relates to a kind of real-time zoom structure of infrared camera. BACKGROUND

[0002] In prior art, visible light observation is the most widely used and mature space remote sensing technology, the energy received by visible light optical system comes from the reflection of target object to visible light or the visible light emitted by object itself, which makes visible light observation can only be carried out when target is in daytime, is greatly influenced by the meteorological conditions of target area. Infrared optical system receives infrared radiation energy from target object itself, overcomes the dependence on time of visible light system, can work all day, and due to the excellent penetration ability of long wave, infrared system can observe in bad weather conditions such as cloud and fog, with the process of modernization of weapons and equipment, security monitoring, industrial monitoring, large-scale application of unmanned driving technology, the demand for infrared camera is more and more.

[0003] At present, similar products on the market are mainly limited by detector, and the number and size of pixels of the detector will affect the imaging resolution. If the number of pixels is insufficient, after zooming, the image is enlarged, and the actual scene range corresponding to each pixel becomes smaller, so mosaic phenomenon is easy to appear, and the image looks unclear. Moreover, the pixel response speed of the detector is also crucial. If the response speed is slow, after zooming, rapidly changing scenes can cause image smearing and produce residual images. Therefore, the technical personnel in the art provide a real-time zoom structure of infrared camera to solve the problems in the above background technology. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of real-time zoom structure of infrared camera, which realizes accurate continuous zoom of infrared camera, has high zoom efficiency, image is stable during zooming process, and image is clear and free of residual image after zooming.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] The utility model provides a kind of real-time zoom structure of infrared camera, which realizes accurate continuous zoom of infrared camera, has high zoom efficiency, image is stable during zooming process, and image is clear and free of residual image after zooming.

[0007] Base;

[0008] Front lens assembly, the front lens assembly is fixed by screw on the front end of base;

[0009] Variable magnification lens assembly, the variable magnification lens assembly is fixed by screw on the rear end of base side wall;

[0010] Compensation mirror assembly, the compensation mirror assembly is fixed by screw on the middle end of base bottom;

[0011] The correcting lens assembly is fixed to the last end of the base bottom by a screw;

[0012] The zoom lens assembly comprises a zoom lens, one end of the zoom lens being connected to a guide rail slider capable of moving along a rolling guide rail installed on the base.

[0013] Further, the zoom lens is connected to a first screw nut capable of moving along the length direction of a first screw, the first screw being arranged in parallel with the rolling guide rail, the first screw being driven to rotate by a first ball screw motor, a first proximity switch being installed on the first ball screw motor close to one end of the first screw nut, the first ball screw motor being installed on the base.

[0014] Further, the compensating lens assembly comprises a compensating lens, the compensating lens being arranged on the same optical axis with the zoom lens, the compensating lens being capable of moving along the length direction of a first guide rail installed on the base.

[0015] Further, the compensating lens is connected to a second screw nut capable of moving along the length direction of a second screw, the second screw being arranged in parallel with the first guide rail, the second screw being driven to rotate by a second ball screw motor, the second ball screw motor being capable of moving along the length direction of a second guide rail, a motor base of the second ball screw motor being connected to the first screw nut.

[0016] Further, a second proximity switch is installed on the compensating lens.

[0017] Further, a third proximity switch is arranged on the first guide rail at the end of the compensating lens away from the zoom lens.

[0018] Further, a fourth proximity switch is arranged on the rolling guide rail at the end of the zoom lens away from the compensating lens.

[0019] Further, the correcting lens assembly comprises a correcting lens, the correcting lens being driven to rotate by a DC motor, the DC motor being installed on the base by a motor base, the correcting lens, the compensating lens and the zoom lens being located on the same optical axis when the correcting lens is driven to rotate by the DC motor, the detector being blocked.

[0020] Further, the front lens assembly comprises a lens chamber, a plurality of coaxially arranged lenses being installed in the lens chamber, the lenses located at the light inlet end and the light outlet end of the lens chamber being fixed by a compression ring, a prism being arranged on the outer wall of the lens chamber close to the light inlet end.

[0021] In the above technical solution, the utility model provides a kind of infrared camera real-time zoom structure, with the following beneficial effects:

[0022] 1, the application can realize fast real-time zooming by the linkage of variable magnification lens and compensation mirror lens and the fine adjustment of compensation mirror lens;

[0023] 2, the host computer sends zoom command, and the first ball screw motor drives variable magnification lens and compensation mirror assembly to move, and still keeps a state of presenting image during movement, and it is possible to appear that presenting image is not clear in this dynamic process, and the second ball screw motor drives compensation mirror lens to move and fine adjustment is carried out, to achieve clear presentation of image during movement;

[0024] 3, the correction mirror assembly is additionally provided, and the image quality is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0026] Figure 1 It is a front view of the infrared camera real-time zoom structure provided in embodiment 1 of the present application.

[0027] Figure 2 It is a sectional view of Figure 1 .

[0028] Figure 3 It is a front view of variable magnification lens assembly in Figure 1 .

[0029] Figure 4 It is a front view of compensation mirror assembly in Figure 1 .

[0030] Figure 5 It is a top view of Figure 4 .

[0031] Figure 6 It is a front view of correction mirror assembly in Figure 1 .

[0032] Figure 7 It is a sectional view of front lens assembly in Figure 1 .

[0033] Explanation of reference signs:

[0034] 10, base;

[0035] 20, zoom lens; 21, guide rail slider; 22, rolling guide; 23, first screw nut; 24, first screw; 25, first ball screw motor; 26, first proximity switch; 27, fourth proximity switch;

[0036] 30, compensating lens; 31, first guide rail; 32, second screw nut; 33, second screw; 34, second ball screw motor; 35, second guide rail; 36, second proximity switch; 37, third proximity switch;

[0037] 40, correcting lens; 41, DC motor; 42, motor base;

[0038] 50, lens chamber; 51, lens; 52, compression ring; 53, prism. DETAILED DESCRIPTION

[0039] In order for those skilled in the art to better understand the technical scheme of the present application, the present application will be further described in detail below with reference to the drawings.

[0040] Referring to Figures 1-2 as shown;

[0041] The infrared camera real-time zoom structure of the embodiment 1 of the present application comprises:

[0042] the base 10;

[0043] the front lens assembly is fixed on the front end of the base 10 by screws;

[0044] the zoom lens assembly is fixed on the rear end of the side wall of the base 10 by screws;

[0045] the compensating lens assembly is fixed on the middle end of the bottom of the base 10 by screws;

[0046] the correcting lens assembly is fixed on the last end of the bottom of the base 10 by screws;

[0047] The zoom lens assembly comprises a zoom lens 20, one end of the zoom lens 20 is connected with a guide rail slider 21, the guide rail slider 21 can move along a rolling guide 22, the rolling guide 22 is installed on the base 10, and the rolling guide 22 is selected from THK micro rolling guides.

[0048] In specific use, the imaging of the detector can be continuously adjusted (adjusting the magnification) to improve the definition of the image by adjusting the different positions of the zoom lens 20 on the rolling guide 22; the zoom lens 20 moves along the rolling guide 22, and the rolling guide 22 is fixed on the base 10, so that the zoom lens can move stably and the image can be stable and clear during the adjustment process.

[0049] Referring to Figures 1-3 as shown;

[0050] The zoom lens 20 is connected with a first screw nut 23, the first screw nut 23 can move along the length direction of a first screw rod 24, the first screw rod 24 is arranged in parallel with the rolling guide rail 22, the first screw rod 24 is driven to rotate by a first ball screw motor 25, a first proximity switch 26 is installed on one end of the first ball screw motor 25 close to the first screw nut 23, and the first ball screw motor 25 is installed on the base 10.

[0051] When the first ball screw motor 25 drives the first screw rod 24 to rotate clockwise, the zoom lens 20 is driven to move along the rolling guide rail 22 away from the first ball screw motor 25 by the first screw nut 23, when the first ball screw motor 25 drives the first screw rod 24 to rotate counterclockwise, the zoom lens 20 is driven to move along the rolling guide rail 22 close to the first ball screw motor 25 by the first screw nut 23, and since the first proximity switch 26 is installed on the first ball screw motor 25, the range of movement of the first screw nut 23 can be limited, so that the knocking situation is avoided.

[0052] Referring to Figures 1-2 , 4-5 as shown;

[0053] The compensation mirror assembly comprises a compensation mirror lens 30, the compensation mirror lens 30 is arranged on the same optical axis with the zoom lens 20, the compensation mirror lens 30 can move along the length direction of a first guide rail 31, and the first guide rail 31 is installed on the base 10.

[0054] The compensation mirror lens 30 is arranged on the side of the zoom lens 20 away from the front lens assembly, by adjusting the position of the compensation mirror lens 30 on the first guide rail 31, the focus deviation during zooming is compensated.

[0055] The compensation mirror lens 30 is connected with a second screw nut 32, the second screw nut 32 can move along the length direction of a second screw rod 33, the second screw rod 33 is arranged in parallel with the first guide rail 31, the second screw rod 33 is driven to rotate by a second ball screw motor 34, the second ball screw motor 34 can move along the length direction of a second guide rail 35, and the motor base of the second ball screw motor 34 is connected with the first screw nut 23.

[0056] The first ball screw motor 25 can drive the zoom lens 20 and the second ball screw motor 32 to move synchronously through the first screw nut 23, that is, the zoom lens 20 and the compensation lens 30 are moved synchronously to the predetermined position, then the compensation lens 30 is driven to move along the first guide rail 31 by the second ball screw motor 34, when the second ball screw motor 34 drives the second screw 33 to rotate clockwise, the compensation lens 30 is driven to move along the first guide rail 31 away from the zoom lens 20 by the second screw nut 32, when the first ball screw motor 34 drives the first screw 33 to rotate counterclockwise, the compensation lens 30 is driven to move along the first guide rail 31 to approach the zoom lens 20 by the first screw nut 32, through the above-mentioned forward and backward adjustment of the compensation lens 30, the image of the detector is continuously adjusted (fine adjustment) to improve the definition of the image.

[0057] The first guide rail 31 and the second guide rail 35 can be selected as THK micro rolling guide rails.

[0058] Further, the compensation lens 30 is provided with a second proximity switch 36.

[0059] The second proximity switch 36 is arranged to avoid the collision between the compensation lens 30 and the zoom lens 20 during the movement of the compensation lens 30.

[0060] The first guide rail 31 is provided with a third proximity switch 37 at the end of the compensation lens 30 away from the zoom lens 20.

[0061] The rolling guide rail 22 is provided with a fourth proximity switch 27 at the end of the zoom lens 20 away from the compensation lens 30.

[0062] The first proximity switch 26, the second proximity switch 36, the third proximity switch 37 and the fourth proximity switch 27 are all photoelectric switches, the third proximity switch 37 and the fourth proximity switch 27 are arranged to avoid the collision between the compensation lens 30 and the zoom lens 20 and other components during the movement of the compensation lens 30 and the zoom lens 20, that is, the total stroke of the movement process is not interfered.

[0063] Referring to Figures 1-2 , 6;

[0064] The correcting lens assembly comprises a correcting lens 40, which is driven to rotate by a direct current motor 41, and the direct current motor 41 is installed on the base 10 through a motor seat 42. When the correcting lens 40 is driven to rotate by the direct current motor 41 to the same optical axis of the correcting lens 40, the compensation lens 30 and the zoom lens 20, the detector is blocked. The correcting lens 40 can be arranged outside the only position of the zoom lens 20 and the compensation lens 30, so as to avoid the collision between the correcting lens 40 and the zoom lens 20 and the compensation lens 30 during the rotation of the correcting lens 40.

[0065] The detector is arranged on the optical axis of the compensation lens 30, the zoom lens 20 and the correcting lens 10. When the ghost appears on the image of the detector, the direct current motor 41 is driven to rotate by the upper computer, and the optical axis part of the compensation lens 30 and the zoom lens 20 is blocked, so that the detector presents a black image, and the background correction is controlled by the upper computer. At this time, the detector is equivalent to a pure black background, that is, the background correction.

[0066] During the movement of the compensation lens 30 and the zoom lens 20, the image appears on the detector. Some images do not change with the change of the lens position and appear ghost, and the images that do not move on the screen during the movement disappear. This part is judged by algorithm.

[0067] Referring to Figures 1-2 , 7;

[0068] The front lens assembly comprises a lens chamber 50, a plurality of coaxially arranged lenses 51 are installed in the lens chamber 50, the lenses 51 located at the light inlet end and the light outlet end of the lens chamber 50 are fixed by a compression ring 52, and a prism 53 is arranged on the outer wall of the lens chamber 50 and close to the light inlet end.

[0069] The application can realize fast real-time zooming through the linkage of the zoom lens 20 and the compensation lens 30 and the fine adjustment of the compensation lens 30. The upper computer sends a zooming command, the first ball screw motor 25 drives the zoom lens 20 and the compensation lens assembly to move, and during the movement, a clear image is still presented. In this dynamic process, the second ball screw motor 34 drives the compensation lens 30 to move for fine adjustment, so as to present a clear image during the movement. At the same time, the correcting lens assembly is additionally arranged, so as to further improve the image quality.

[0070] The best use state is that in the process that the first ball screw motor 35 drives the zoom lens 20 and the compensation mirror assembly to realize focal length adjustment, the compensation mirror assembly can quickly give feedback according to the image and adjust the position of the compensation mirror lens 30 to realize real-time zooming; at the same time, the image ghosting can be distinguished and the rotation of the correction mirror lens can be corrected better than the time length of image saving.

[0071] Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application. These changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An infrared camera real-time zoom structure, characterized in that, It includes: Base (10); Front lens assembly, which is fixed to the front end of the base (10) by screw; Zoom lens assembly, which is fixed to the rear end of the side wall of the base (10) by screw; Compensation mirror assembly, which is fixed to the middle end of the bottom of the base (10) by screw; Corrective lens assembly, which is fixed to the last end of the bottom of the base (10) by screw; The zoom lens assembly includes a zoom lens (20), one end of which is connected to a guide rail slider (21), which can move along a rolling guide rail (22) installed on the base (10).

2. The real-time zoom structure of an infrared camera according to claim 1, characterized in that: The zoom lens (20) is connected with a first screw nut (23), which can move along the length direction of a first lead screw (24), which is arranged in parallel with the rolling guide rail (22), and the first lead screw (24) is driven to rotate by a first ball screw motor (25), one end of which is installed with a first proximity switch (26) close to the first screw nut (23), and the first ball screw motor (25) is installed on the base (10).

3. The real-time zoom structure of an infrared camera according to claim 2, characterized in that: The compensation mirror assembly includes a compensation mirror lens (30), which is arranged on the same optical axis with the zoom lens (20), and the compensation mirror lens (30) can move along the length direction of a first guide rail (31) installed on the base (10).

4. The real-time zoom structure of an infrared camera according to claim 3, characterized in that: The compensation mirror lens (30) is connected with a second screw nut (32), which can move along the length direction of a second lead screw (33), which is arranged in parallel with the first guide rail (31), and the second lead screw (33) is driven to rotate by a second ball screw motor (34), which can move along the length direction of a second guide rail (35), and the motor base of the second ball screw motor (34) is connected with the first screw nut (23).

5. The real-time zoom structure of an infrared camera according to claim 3, characterized in that: The compensation mirror lens (30) is installed with a second proximity switch (36).

6. The real-time zoom structure of an infrared camera according to claim 3, characterized in that: The third proximity switch (37) is arranged on the first guide rail (31) at the end of the compensation mirror lens (30) away from the zoom lens (20).

7. The real-time zoom structure of an infrared camera according to claim 6, characterized in that: The fourth proximity switch (27) is arranged on the rolling guide rail (22) at the end of the zoom lens (20) away from the compensation mirror lens (30).

8. The real-time zoom structure of an infrared camera according to claim 1, characterized in that: The corrective lens assembly includes a corrective lens (40), which is driven to rotate by a DC motor (41), and the DC motor (41) is installed on the base (10) through a motor base (42), and when the corrective lens (40), the compensation mirror lens (30) and the zoom lens (20) are located on the same optical axis by the rotation of the DC motor (41), the detector is blocked.

9. The real-time zoom structure of an infrared camera according to claim 1, characterized in that: The front lens assembly comprises a lens chamber (50) in which a plurality of coaxially arranged lenses (51) are installed, the lenses (51) at the light inlet end and the light outlet end of the lens chamber (50) are fixed by a pressing ring (52), and a prism (53) is arranged on the outer wall of the lens chamber (50) and close to the light inlet end.

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