CN220960548U - Infrared reverse-throw MTF tester - Google Patents
Infrared reverse-throw MTF tester Download PDFInfo
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- CN220960548U CN220960548U CN202322744608.2U CN202322744608U CN220960548U CN 220960548 U CN220960548 U CN 220960548U CN 202322744608 U CN202322744608 U CN 202322744608U CN 220960548 U CN220960548 U CN 220960548U
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- infrared
- thermal imaging
- carrier plate
- fixedly connected
- reverse
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- 238000001931 thermography Methods 0.000 claims abstract description 42
- 238000006073 displacement reaction Methods 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000003384 imaging method Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000003399 chemotactic effect Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The application provides an infrared reverse projection MTF tester, and relates to the technical field of infrared lens detection. The infrared reverse-projection MTF tester comprises a machine shell, a carrier plate is fixedly connected in the machine shell, a vertical moving mechanism is arranged at the bottom side of the carrier plate, a heat source component is arranged at the displacement end of the vertical moving mechanism, a swing imaging mechanism is arranged at the top side of the carrier plate, a thermal imaging camera is arranged on the swing imaging mechanism, a carrying disc is detachably arranged on the carrier plate and is used for containing a thermal imaging lens to be detected, the vertical moving mechanism is utilized to drive the heat source component to displace relative to the thermal imaging lens to be detected, so that the thermal imaging lens to be detected is motionless, the defocusing position of the thermal imaging lens to be detected is changed, meanwhile, the thermal imaging camera on the carrier plate is driven to swing by the cooperation of the swing imaging mechanism, and the sharp angle can be adjusted so as to detect the MTF value of each trend area of the thermal imaging lens to be detected, the thermal imaging lens to be detected is prevented from moving to realize detection, and the damage probability of the thermal imaging lens to be detected is reduced.
Description
Technical Field
The application relates to the technical field of infrared lens detection, in particular to an infrared reverse projection MTF tester.
Background
The infrared lens is usually made of germanium glass, which has a high refractive index, is transparent to infrared light only, and is opaque to visible light and ultraviolet light, so that thermal imaging can be realized in a very dark environment in cooperation with the detector, and the quality of the infrared lens (thermal imaging lens) directly influences the imaging quality of the imaging device because the infrared lens (thermal imaging lens) plays a role in adjusting the focal length to image an image clearly on a focal plane.
In practical use, when the infrared lens is used for MTF detection, the defocusing position of the infrared lens needs to be frequently changed to detect the MTF value, and the cost of the infrared lens with better cost is higher, so that the infrared lens is extremely easy to be damaged if the defocusing position is changed by moving the infrared lens in the detection process.
Disclosure of utility model
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides an infrared reverse projection MTF tester, which aims to solve the problem that the infrared lens is easy to damage when the defocusing position is changed by moving the infrared lens in the test process of the traditional infrared reverse projection MTF tester.
The application provides an infrared reverse-projection MTF tester, which comprises a casing, wherein an electric cabinet, an industrial personal computer and a display are arranged in the casing, and the tester also comprises:
the camera is characterized in that a carrier plate is fixedly connected in the casing, a vertical moving mechanism is arranged at the bottom side of the carrier plate, a heat source component is arranged at the displacement end of the vertical moving mechanism, a swing imaging mechanism is arranged at the top side of the carrier plate, a thermal imaging camera is mounted on the swing imaging mechanism, and a carrier plate is detachably mounted on the carrier plate and used for containing a thermal imaging lens to be detected.
The infrared reverse projection MTF tester provided by the embodiment of the application has the beneficial effects that: the vertical moving mechanism is utilized to drive the heat source component to displace relative to the thermal imaging lens to be detected in the bearing disc on the carrier plate, so that the thermal imaging lens to be detected is fixed, the defocusing position of the thermal imaging lens to be detected is changed, and meanwhile, the thermal imaging camera on the heat source component is driven by the swinging imaging mechanism to swing, so that the sharp angle can be adjusted, the MTF value of each chemotactic area of the thermal imaging lens to be detected is detected, the thermal imaging lens to be detected is prevented from being moved to realize detection, and the damage probability of the thermal imaging lens to be detected is reduced.
In addition, the infrared reverse projection MTF tester according to the embodiment of the application has the following additional technical characteristics:
In some embodiments of the present application, through holes are provided on the carrier plate, and positioning holes are uniformly provided on the peripheral sides of the through holes.
In some embodiments of the present application, the vertical movement mechanism includes a main displacement cylinder fixedly connected to the bottom side of the carrier plate, and an auxiliary displacement cylinder is fixedly connected to the displacement end of the main displacement cylinder.
In some embodiments of the present application, the swing imaging mechanism includes a rotary cylinder and a tripod fixedly connected to the carrier, an output shaft of the rotary cylinder rotates through the tripod, a swing frame is fixedly connected to an end of the output shaft of the rotary cylinder, which penetrates through the tripod, and the thermal imaging camera is fixedly connected to an end of the swing frame, which is far away from the rotary cylinder.
In some embodiments of the application, the heat source assembly comprises a heating block fixedly connected to the displacement end of the auxiliary displacement cylinder, and a cross CHART plate fixedly connected to the displacement end of the auxiliary displacement cylinder.
In some embodiments of the application, the heating block, the cross CHART plate, and the through-hole are coaxially disposed.
In some embodiments of the present application, a positioning rod is fixedly connected to the bottom side of the bearing plate, and the positioning rod is in plug-in fit with the positioning hole.
In some embodiments of the present application, a bearing groove is provided at the top end of the bearing disc, and the bearing groove is used for placing a thermal imaging lens to be detected.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present application and therefore should not be considered as limiting the scope, and other related 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 the overall structure of an infrared reverse-projection MTF tester according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a partial structure of an infrared reverse projection MTF tester according to an embodiment of the present application;
FIG. 3 is a structural exploded view of a vertical movement mechanism and heat source assembly according to an embodiment of the present application;
FIG. 4 is a schematic view of a carrier tray and carrier plate according to an embodiment of the application;
Fig. 5 is a schematic diagram of a prior art back projection measurement method.
Icon: 1. a housing; 11. an electric control box; 12. an industrial personal computer; 13. a display; 2. a carrier plate; 21. a through hole; 22. positioning holes; 3. a vertical movement mechanism; 31. a main displacement cylinder; 32. an auxiliary displacement cylinder; 4. a swing imaging mechanism; 41. a rotary cylinder; 42. a tripod; 43. a swing frame; 44. a thermal imaging camera; 5. a heat source assembly; 51. a heating block; 52. a cross CHART plate; 6. a carrying tray; 61. a positioning rod; 62. a carrying groove.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments of the application, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the application.
As shown in fig. 1 to fig. 4, the infrared reverse-projection MTF tester according to the embodiment of the present application includes a casing 1, and an electric cabinet 11, an industrial personal computer 12 and a display 13 are disposed in the casing 1, and it should be noted that the electric cabinet 11, the industrial personal computer 12 and the display 13 are in the prior art, and are not described herein.
Wherein, fixedly connected with carrier plate 2 in casing 1, carrier plate 2 downside is provided with vertical movement mechanism 3, and vertical movement mechanism 3's displacement end is provided with heat source subassembly 5, and carrier plate 2 top side is provided with swing imaging mechanism 4, installs thermal imaging camera 44 on the swing imaging mechanism 4, and demountable installation has loading disc 6 on the carrier plate 2, and loading disc 6 is used for holding the thermal imaging camera lens that waits to detect.
It should be noted that, in the embodiment of the present application, the heat source assembly 5 is disposed at the bottom side of the carrier plate 2, the thermal imaging camera 44 is disposed at the top side of the carrier plate 2, and the MTF value of the thermal imaging lens to be detected is measured by adopting a back projection measurement method.
Further, through holes 21 are formed in the carrier plate 2, so that a heat source can conveniently pass through, and positioning holes 22 are uniformly formed in the periphery of the through holes 21.
Further, the vertical moving mechanism 3 includes a main moving cylinder 31 fixedly connected to the bottom side of the carrier plate 2, and an auxiliary moving cylinder 32 is fixedly connected to the moving end of the main moving cylinder 31.
Further, the swing imaging mechanism 4 comprises a rotary air cylinder 41 and a tripod 42 which are fixedly connected to the carrier plate 2, an output shaft of the rotary air cylinder 41 rotates to penetrate through the tripod 42, one end of the output shaft of the rotary air cylinder 41 penetrating through the tripod 42 is fixedly connected with a swing frame 43, and the thermal imaging camera 44 is fixedly connected to one end of the swing frame 43 far away from the rotary air cylinder 41, so that the swing frame 43 can be driven to change in angle through the rotary air cylinder 41, and then the thermal imaging camera 44 at the top of the swing frame 43 can detect different projection areas of the thermal imaging lens to be detected.
Specifically, the connection relationship between the thermal imaging camera 44 and the electric cabinet 11, the industrial personal computer 12 and the display 13 is the prior art, and will not be described herein.
Further, the heat source assembly 5 includes a heating block 51 fixedly connected to the displacement end of the auxiliary displacement cylinder 32, and a cross CHART plate 52 fixedly connected to the displacement end of the auxiliary displacement cylinder 32.
Further, the heating block 51, the cross CHART plate 52 and the through-hole 21 are coaxially arranged.
It can be understood that the main displacement cylinder 31 can drive the auxiliary displacement cylinder 32 thereon to perform larger displacement, and the auxiliary displacement cylinder 32 further drives the heating block 51 and the cross CHART plate 52 to perform fine adjustment, so as to change the defocus distance of the thermal imaging lens to be detected, and make the detection result more perfect.
Furthermore, the bottom side of the bearing plate 6 is uniformly fixedly connected with a positioning rod 61, and the positioning rod 61 is in plug-in fit with the positioning hole 22, so that the bearing plate 6 is convenient to mount or dismount on the bearing plate 2.
Further, a carrying groove 62 is arranged at the top end of the carrying disc 6, and the carrying groove 62 is used for placing a thermal imaging lens to be detected.
To sum up, it can be understood that, in the embodiment of the present application, the main displacement cylinder 31 can drive the auxiliary displacement cylinder 32 thereon to perform larger displacement, the auxiliary displacement cylinder 32 further drives the heating block 51 and the cross CHART plate 52 to perform fine adjustment, so as to change the defocus distance of the thermal imaging lens to be detected, so that the detection result is more perfect, and meanwhile, the rotating cylinder 41 can drive the swinging frame 43 to perform angle change, so that the thermal imaging camera 44 at the top of the swinging frame 43 can detect different projection areas of the thermal imaging lens to be detected, so that the detection result is more comprehensive.
It should be noted that, specific model specifications of the electric cabinet 11, the industrial personal computer 12, the display 13, the main displacement cylinder 31, the auxiliary displacement cylinder 32, the rotary cylinder 41, the thermal imaging camera 44, the heating block 51 and the cross CHART board 52 need to be determined by selecting the model according to the actual specifications of the device, and the specific model selection calculation method adopts the prior art in the field, so that detailed description is omitted.
The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. The utility model provides an MTF tester is thrown to infrared contrary, contains casing (1), be provided with electric cabinet (11), industrial computer (12) and display (13) in casing (1), its characterized in that:
The camera is characterized in that a carrier plate (2) is fixedly connected in the casing (1), a vertical moving mechanism (3) is arranged on the bottom side of the carrier plate (2), a heat source assembly (5) is arranged at the displacement end of the vertical moving mechanism (3), a swinging imaging mechanism (4) is arranged on the top side of the carrier plate (2), a thermal imaging camera (44) is arranged on the swinging imaging mechanism (4), a carrying disc (6) is detachably arranged on the carrier plate (2), and the carrying disc (6) is used for containing a thermal imaging lens to be detected.
2. The infrared reverse-projection MTF tester according to claim 1, wherein: the support plate (2) is provided with through holes (21), and positioning holes (22) are uniformly formed in the periphery of the through holes (21).
3. The infrared reverse-projection MTF tester according to claim 2, wherein: the vertical moving mechanism (3) comprises a main moving cylinder (31) fixedly connected to the bottom side of the carrier plate (2), and an auxiliary moving cylinder (32) is fixedly connected to the moving end of the main moving cylinder (31).
4. The infrared reverse-projection MTF tester according to claim 1, wherein: the swing imaging mechanism (4) comprises a rotary air cylinder (41) and a tripod (42) which are fixedly connected to the carrier plate (2), an output shaft of the rotary air cylinder (41) rotates to penetrate through the tripod (42), a swing frame (43) is fixedly connected to one end of the output shaft of the rotary air cylinder (41) penetrating through the tripod (42), and a thermal imaging camera (44) is fixedly connected to one end of the swing frame (43) away from the rotary air cylinder (41).
5. The infrared reverse-projection MTF tester according to claim 3, wherein: the heat source assembly (5) comprises a heating block (51) fixedly connected with the displacement end of the auxiliary displacement cylinder (32), and a cross CHART plate (52) fixedly connected with the displacement end of the auxiliary displacement cylinder (32).
6. The infrared reverse-projection MTF tester according to claim 5, wherein: the heating block (51), the cross CHART plate (52) and the through hole (21) are coaxially arranged.
7. The infrared reverse-projection MTF tester according to claim 2, wherein: the bottom side of the bearing plate (6) is uniformly fixedly connected with a positioning rod (61), and the positioning rod (61) is in plug-in fit with the positioning hole (22).
8. The infrared reverse-projection MTF tester according to claim 1, wherein: the top end of the bearing disc (6) is provided with a bearing groove (62), and the bearing groove (62) is used for placing a thermal imaging lens to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322744608.2U CN220960548U (en) | 2024-04-08 | 2024-04-08 | Infrared reverse-throw MTF tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322744608.2U CN220960548U (en) | 2024-04-08 | 2024-04-08 | Infrared reverse-throw MTF tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220960548U true CN220960548U (en) | 2024-05-14 |
Family
ID=90976654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322744608.2U Active CN220960548U (en) | 2024-04-08 | 2024-04-08 | Infrared reverse-throw MTF tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220960548U (en) |
-
2024
- 2024-04-08 CN CN202322744608.2U patent/CN220960548U/en active Active
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