CN213240636U - Medium wave motor focusing infrared lens - Google Patents
Medium wave motor focusing infrared lens Download PDFInfo
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- CN213240636U CN213240636U CN202022184681.5U CN202022184681U CN213240636U CN 213240636 U CN213240636 U CN 213240636U CN 202022184681 U CN202022184681 U CN 202022184681U CN 213240636 U CN213240636 U CN 213240636U
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Abstract
The utility model provides a medium wave motor focusing infrared lens, includes the lens cone, set gradually positive lens A, positive lens B and positive lens C from left to right along light incidence direction in the lens cone, positive lens A is 4.7mm with positive lens B's air interval, positive lens B is 21.64mm with positive lens C's air interval. The novel focusing lens has the advantages of reasonable design, compact structure, moderate lens structure length, stable and non-offset optical axis and high transmittance in the focusing process. In the optical design, the optical system can be matched with a medium-wave infrared refrigeration 320 multiplied by 256 and 30 mu m detector to perform the tasks of live recording and monitoring, is simple to assemble and is suitable for large-scale production.
Description
Technical Field
The utility model relates to a medium wave motor focusing infrared camera lens.
Background
With the development of science and technology, infrared imaging technology has been widely applied in the fields of national defense, industry, medical treatment and the like. The infrared detection has certain capabilities of penetrating smoke, fog, haze, snow and the like and recognizing camouflage, is not interfered by battlefield strong light and flash light to cause blindness, can realize remote and all-weather observation, and is particularly suitable for target detection at night and under adverse weather conditions.
However, the temperature not only affects the refractive index of the optical material, but also expands with heat and contracts with cold on the lens barrel material, so that the focal power changes and the optimal image plane shifts, the optical imaging quality is reduced, the image is blurred, the contrast is reduced, and the imaging performance of the lens is finally affected, but the temperature change can be compensated through the motor focusing to cause the image plane to shift; meanwhile, when the lens monitors objects with different distances, the images are virtual and unclear because the optimal image planes of the objects with different distances are not on the same plane when the objects with different distances are imaged through the lens; objects with different distances can be imaged on the same surface through the lens in a lens focusing mode.
Disclosure of Invention
An object of the utility model is to provide a medium wave motor focusing infrared camera lens, this camera lens formation of image is clear and simple structure.
The technical scheme of the utility model lies in: the utility model provides a medium wave motor focusing infrared lens, includes the lens cone, set gradually positive lens A, positive lens B and positive lens C from left to right along light incidence direction in the lens cone, positive lens A is 4.7mm with positive lens B's air interval, positive lens B is 21.64mm with positive lens C's air interval.
Further, the lens barrel comprises a main lens barrel and a focusing lens barrel sliding in the main lens barrel, a guide assembly is arranged on the outer side of the main lens barrel, and an electric assembly is arranged at the right end of the focusing lens barrel.
Further, the positive lens C is arranged in the focusing lens barrel, a C-piece pressing ring for fixing the positive lens C in the focusing lens barrel is arranged on the left side of the positive lens C, the positive lens a and the positive lens B are arranged in the main lens barrel, an a-piece pressing ring for fixing the positive lens a in the main lens barrel is arranged on the left side of the positive lens a, and an AB spacer for fixing the positive lens B in the main lens barrel is arranged on the left side of the positive lens B.
Furthermore, a plurality of ventilation grooves are formed in the outer cylinder wall of the focusing lens barrel.
Further, the guide assembly comprises a guide sleeve sleeved on the main lens barrel, at least one guide groove is formed in the guide sleeve, at least one sliding groove is formed in the barrel wall of the main lens barrel, a guide nail is arranged in the guide groove, and the guide nail penetrates through the sliding groove and is fixed on the focusing lens barrel.
Further, the electric component comprises a connecting flange arranged at the right end of the main lens cone, a motor frame is arranged on the outer side wall of the connecting flange, a motor is arranged on the motor frame, a motor gear is arranged at the tail end of an output shaft of the motor, and a guide sleeve gear meshed with the motor gear is arranged on the outer side of the guide sleeve.
Furthermore, a micro switch flange is arranged between the main lens barrel and the connecting flange, and two micro switches are arranged on the outer side wall of the micro switch flange.
Furthermore, a plurality of adjusting grooves are uniformly distributed on the connecting flange along the circumferential direction, and a plurality of adjusting grooves are uniformly distributed on the microswitch flange along the circumferential direction.
Compared with the prior art, the utility model has the advantages of it is following: the novel focusing lens has the advantages of reasonable design, compact structure, moderate lens structure length, stable and non-offset optical axis and high transmittance in the focusing process. In the optical design, the optical system can be matched with a medium-wave infrared refrigeration 320 multiplied by 256 and 30 mu m detector to perform the tasks of live recording and monitoring, is simple to assemble and is suitable for large-scale production.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic external structural view of the present invention;
fig. 3 is a schematic view of an optical system according to the present invention;
in the figure: 1-main lens cone, 2-A sheet pressing ring, 3-guide sleeve gear, 4-guide nail, 5-microswitch flange, 6-connecting flange, 7-positive lens C, 8-focusing lens cone, 9-C sheet pressing ring, 10-positive lens B, 11-AB space ring, 12-positive lens A, 13-motor gear, 14-motor and 15-microswitch.
Detailed Description
In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.
Refer to fig. 1-3.
The utility model provides a medium wave motor focusing infrared lens, includes the lens cone, set gradually positive lens A, positive lens B and positive lens C from left to right along light incidence direction in the lens cone, positive lens A is 4.7mm with positive lens B's air interval, positive lens B is 21.64mm with positive lens C's air interval.
In this embodiment, the lens barrel includes a main lens barrel and a focus lens barrel sliding in the main lens barrel, a guide assembly is disposed outside the main lens barrel, an electric assembly is disposed at a right end of the focus lens barrel, and the focus lens barrel can move back and forth in the main lens barrel under the combined action of the guide assembly and the electric assembly.
In this embodiment, positive lens C sets up in the focusing lens cone, positive lens C left side is provided with the C piece clamping ring of fixing positive lens C in the focusing lens cone, positive lens a sets up in the main lens cone with positive lens B, positive lens a left side is provided with the a piece clamping ring of fixing positive lens a in the main lens cone, positive lens B left side is provided with the AB space circle of fixing positive lens B in the main lens cone, the junction of positive lens a and main lens cone scribbles waterproof silica gel.
In this embodiment, the outer cylinder wall of the focusing lens barrel is provided with a plurality of ventilation grooves, so that when the focusing lens barrel moves back and forth, the situation that the focusing lens barrel rebounds due to overlarge air pressure in the main lens barrel is avoided, the weight of the focusing lens barrel is reduced, the abrasion of the guide assembly and the electric assembly is reduced, and the service life of the guide assembly and the electric assembly is prolonged.
In this embodiment, the guide assembly includes a guide sleeve sleeved on the main lens barrel, the guide sleeve is provided with at least one guide groove, the barrel wall of the main lens barrel is provided with at least one sliding groove, a guide nail is arranged in the guide groove, the guide nail penetrates through the sliding groove and is fixed on the focusing lens barrel, the guide nail can be driven to move back and forth in the sliding groove by rotating the guide sleeve, the focusing lens barrel is driven to move back and forth in the main lens barrel, meanwhile, the lens optical axis is only moved back and forth in the focusing process, and large offset of the lens optical axis in the moving process is avoided.
In this embodiment, the electric component includes the flange that sets up in the main lens cone right-hand member, flange's lateral wall is provided with the motor frame, be provided with the motor on the motor frame, the output shaft end of motor is provided with the motor gear, the guide pin bushing outside is provided with the guide pin bushing gear with motor gear engaged with, the motor orders about the motor gear and drives the rotation of guide pin bushing gear for the guide pin bushing is rotatory, drives the focusing lens cone back-and-forth movement, in order to realize the switching of camera lens focus visual field.
In this embodiment, a micro switch flange is arranged between the main lens barrel and the connecting flange, two micro switches are arranged on the outer side wall of the micro switch flange, a contact is arranged at the right end of the guide sleeve, the contact is matched with the micro switch, and after the guide sleeve rotates for a certain angle, the contact touches the micro switch to turn off the motor so as to limit the rotation angle of the guide sleeve and the movement displacement of the focusing lens barrel and avoid overtravel.
In this embodiment, flange goes up to have a plurality of adjustment tanks along the circumferencial direction equipartition, the micro-gap switch flange goes up to have a plurality of adjustment tanks along the circumferencial direction equipartition, and the regulation through the adjustment tank can avoid motor and the inside other components and parts of core on the flange to interfere, and can also avoid flange and micro-gap switch flange's interference, reduce electrical components's the assembly degree of difficulty and machining precision error.
In this embodiment, the specific performance parameters of the optical structure are: (1) the working wave band is as follows: 3.2-3.4 μm; (2) focal length: f' =45 mm; (3) a detector: the long-wave infrared non-refrigeration type is 320 multiplied by 256 and 30 mu m; (4) the field angle: 12 ° × 9.6 °; (5) relative pore diameter D/f': 1/2.
In this embodiment, the parameters of the positive lenses a, B and C are as follows:
note: in table 1, the radius of curvature refers to the radius of curvature of each surface of the lens, and the air gap refers to the distance between two adjacent lenses, for example: s1, S2 are the surfaces of the positive lens a that are distant from and adjacent to the positive lens B, respectively.
The above is only the preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
Claims (8)
1. The utility model provides a medium wave motor focusing infrared lens, includes the lens cone, its characterized in that, set gradually positive lens A, positive lens B and positive lens C from left to right along light incidence direction in the lens cone, the air interval of positive lens A and positive lens B is 4.7mm, the air interval of positive lens B and positive lens C is 21.64 mm.
2. The medium wave motor focusing infrared lens according to claim 1, wherein the lens barrel comprises a main lens barrel and a focusing lens barrel sliding in the main lens barrel, a guide assembly is arranged outside the main lens barrel, and a motorized assembly is arranged at the right end of the focusing lens barrel.
3. The medium wave motor focusing infrared lens of claim 2, characterized in that the positive lens C is arranged in a focusing lens barrel, a C-piece pressing ring for fixing the positive lens C in the focusing lens barrel is arranged on the left side of the positive lens C, the positive lens a and the positive lens B are arranged in a main lens barrel, an a-piece pressing ring for fixing the positive lens a in the main lens barrel is arranged on the left side of the positive lens a, and an AB spacer for fixing the positive lens B in the main lens barrel is arranged on the left side of the positive lens B.
4. The medium wave motor focusing infrared lens of claim 2, characterized in that a plurality of ventilation grooves are arranged on the outer cylinder wall of the focusing lens barrel.
5. The medium wave motor focusing infrared lens of claim 2, wherein the guiding assembly comprises a guide sleeve sleeved on the main lens barrel, at least one guiding groove is arranged on the guide sleeve, at least one sliding groove is arranged on the barrel wall of the main lens barrel, a guiding nail is arranged in the guiding groove, and the guiding nail penetrates through the sliding groove and is fixed on the focusing lens barrel.
6. The medium wave motor focusing infrared lens of claim 5, wherein the electric component comprises a connecting flange arranged at the right end of the main lens barrel, a motor frame is arranged on the outer side wall of the connecting flange, a motor is arranged on the motor frame, a motor gear is arranged at the tail end of an output shaft of the motor, and a guide sleeve gear meshed with the motor gear is arranged outside the guide sleeve.
7. The medium wave motor focusing infrared lens of claim 6, characterized in that a micro switch flange is arranged between the main lens barrel and the connecting flange, and two micro switches are arranged on the outer side wall of the micro switch flange.
8. The medium wave motor focusing infrared lens of claim 7, wherein a plurality of adjusting grooves are evenly distributed on the connecting flange along the circumferential direction, and a plurality of adjusting grooves are evenly distributed on the microswitch flange along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022184681.5U CN213240636U (en) | 2020-09-29 | 2020-09-29 | Medium wave motor focusing infrared lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022184681.5U CN213240636U (en) | 2020-09-29 | 2020-09-29 | Medium wave motor focusing infrared lens |
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| Publication Number | Publication Date |
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| CN213240636U true CN213240636U (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022184681.5U Active CN213240636U (en) | 2020-09-29 | 2020-09-29 | Medium wave motor focusing infrared lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112114415A (en) * | 2020-09-29 | 2020-12-22 | 福建福光天瞳光学有限公司 | Medium-wave motor focusing infrared lens and assembling method thereof |
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2020
- 2020-09-29 CN CN202022184681.5U patent/CN213240636U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112114415A (en) * | 2020-09-29 | 2020-12-22 | 福建福光天瞳光学有限公司 | Medium-wave motor focusing infrared lens and assembling method thereof |
| CN112114415B (en) * | 2020-09-29 | 2024-05-10 | 福建福光天瞳光学有限公司 | Medium wave motor focusing infrared lens and assembly method thereof |
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