CN209979913U - Long-wave mechanical athermal focusing infrared lens - Google Patents
Long-wave mechanical athermal focusing infrared lens Download PDFInfo
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- CN209979913U CN209979913U CN201920879557.5U CN201920879557U CN209979913U CN 209979913 U CN209979913 U CN 209979913U CN 201920879557 U CN201920879557 U CN 201920879557U CN 209979913 U CN209979913 U CN 209979913U
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Abstract
The utility model provides a long wave machinery does not have thermalization focusing infrared camera lens, including the lens cone, positive lens A, negative lens B and positive lens C have set gradually along light from left right side incident direction in the lens cone, positive lens A is 8.89mm with negative lens B's air space, negative lens B is 6.34mm with positive lens C's air space. The utility model relates to a rationally, compact structure, convenient to carry, high luminousness, focusing process camera lens optical axis is stable, and preparation low cost is fit for planning the chemical production in batches, has the practicality.
Description
Technical Field
The utility model relates to a long wave machinery does not have thermalization 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, 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 change and the optimal image plane shift, the optical imaging quality is reduced, images are blurred, the contrast ratio is reduced, the imaging performance of the lens is finally affected, and the image plane shift caused by temperature change can be compensated through different material expansion coefficients; 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.
SUMMERY OF THE UTILITY MODEL
The utility model discloses improve above-mentioned problem, promptly the to-be-solved technical problem of the utility model is to provide a long wave machinery does not have thermalization focusing infrared camera lens, and the formation of image is clear and simple structure, realizes the regulation of machinery does not have the thermalization.
The utility model discloses a concrete implementation scheme is: the long-wave mechanical athermalization focusing infrared lens comprises a lens barrel, wherein a positive lens A, a negative lens B and a positive lens C are sequentially arranged in the lens barrel along the incident direction of light rays from left to right, the air interval between the positive lens A and the negative lens B is 8.89mm, and the air interval between the negative lens B and the positive lens C is 6.34 mm.
Further, the lens cone comprises a main lens cone, a mechanical athermalization part is mounted on the main lens cone, the mechanical athermalization part comprises a first telescopic ring and a second telescopic ring which are mounted on the main lens cone, a fixing part is arranged between the first telescopic ring and the second telescopic ring, a moving seat is further arranged on the main lens cone, a first sealing ring is arranged on the moving seat, a rear gear ring used for fixing the main lens cone and the moving seat is arranged on the main lens cone, and an elastic gasket is further arranged between the moving seat and the rear gear ring.
Further, the outer side of the main lens cone is provided with an outer cover, a second sealing ring is installed on the inner side of the outer cover, a focusing guide nail penetrating through the outer cover and the movable seat is arranged on the outer cover, a focusing cam is installed on the focusing guide nail, and a second telescopic ring, a fixing piece and a first telescopic ring are sequentially located between the outer cover and the main lens cone.
Furthermore, a positive lens A, a negative lens B and a positive lens C are all fixed inside the main lens cone, and a space ring is arranged between the positive lens A and the negative lens B.
Further, a rear pressing ring for fixing the positive lens C on the main lens barrel is arranged on the positive lens C, and a front pressing ring for fixing the negative lens B on the main lens barrel is arranged on the negative lens B.
Furthermore, a fixing screw penetrating through the outer cover is fixedly connected to the outer cover.
Furthermore, a limit ring is arranged between the focusing cam and the main lens cone.
Compared with the prior art, the utility model discloses following beneficial effect has: the device has the advantages of reasonable design, compact structure, short structural length of the lens, stable and non-offset optical axis in the focusing process, convenient carrying and high transmittance, can be adapted to a long-wave infrared uncooled 640 multiplied by 512 and 17 mu m detector in optical design to carry out live recording and monitoring tasks, has low manufacturing cost, is suitable for large-scale production, and has practicability.
Drawings
Fig. 1 is a first schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the present invention.
In the figure: 1-a limiting ring, 2-a focusing cam, 3-a focusing guide nail, 4-an outer cover, 5-a fixing screw, 6-a second telescopic ring, 7-a fixing piece, 8-a first telescopic ring, 9-a main lens barrel, 10-a positive lens A, 11-a spacing ring, 12-a first sealing ring, 13-a negative lens B, 14-a front pressing ring, 15-a second sealing ring, 16-a moving seat, 17-an elastic gasket, 18-a rear retaining ring, 19-a rear pressing ring and 20-a positive lens C.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the embodiment, as shown in fig. 1 ~ 2, in the embodiment, a long-wave mechanical athermalized focusing infrared lens is provided, which includes a lens barrel, a positive lens a10, a negative lens B13 and a positive lens C20 are sequentially disposed in the lens barrel along a left-right incident direction of light, an air interval between the positive lens a10 and the negative lens B13 is 8.89mm, and an air interval between the negative lens B13 and the positive lens C20 is 6.34 mm.
In this embodiment, the lens barrel includes a main lens barrel 9, the main lens barrel 9 is mounted with a mechanical athermalization component, the mechanical athermalization component includes a first telescopic ring 8 and a second telescopic ring 6 mounted on the main lens barrel 9, a fixing member 7 is disposed between the first telescopic ring 8 and the second telescopic ring 6, the main lens barrel 9 is further provided with a moving seat 16, the moving seat 16 is provided with a first sealing ring 12, the main lens barrel 9 is provided with a rear stop ring 18 for fixing the main lens barrel 9 and the moving seat 16, and an elastic gasket 17 is further disposed between the moving seat 16 and the rear stop ring 18.
When the device is used, the mechanical athermalization is realized by the fact that the first telescopic ring, the fixing piece and the second telescopic ring are telescopic when the temperature changes through different expansion coefficients of the first telescopic ring, the fixing piece and the second telescopic ring, so that the main lens barrel and the positive lens A, the negative lens B and the positive lens C on the main lens barrel are driven to move back and forth, and the image plane deviation caused by the temperature change is compensated.
In this embodiment, an outer cover 4 is arranged at the outer side of the main lens barrel 9, a second sealing ring 15 is installed on the inner side of the outer cover 4, a focusing guide pin 3 penetrating through the outer cover and moving seats is arranged on the outer cover 4, a focusing cam 2 is installed on the focusing guide pin 3, a second telescopic ring 6, a fixing piece 7 and a first telescopic ring 8 are sequentially located between the outer cover and the main lens barrel, the focusing cam 2 can be adjusted through rotation, a guide groove matched with the focusing guide pin is formed in the main lens barrel, and the focusing guide pin moves back and forth under the limitation of the guide groove so as to drive the main lens barrel to move back and forth, so that the lens optical axis only moves back and forth in the focusing process is ensured, and large offset of the lens optical axis in.
In this embodiment, the positive lens a10, the negative lens B13, and the positive lens C20 are all fixed inside the main barrel 9, and a spacer 11 is disposed between the positive lens a10 and the negative lens B13.
In this embodiment, the positive lens C is provided with a rear pressing ring 19 for fixing the positive lens C to the main barrel, and the negative lens B is provided with a front pressing ring 14 for fixing the negative lens B to the main barrel.
In this embodiment, a fixing screw 5 penetrating through the housing is fixedly connected to the housing 4.
In this embodiment, a limiting ring 1 is disposed between the focusing cam and the main barrel.
In this embodiment, the device can be adapted to a long-wave infrared uncooled 640 × 512, 17 μm detector for live recording and monitoring tasks.
In this embodiment, the optical structure formed by the positive lens a7, the negative lens B9, and the positive lens C11 achieves the following optical criteria:
the working wave band is as follows: 8-12 μm;
focal length: f' =15 mm;
a detector: the long-wave infrared non-refrigeration type is 640 multiplied by 512, 17 mu m;
the field angle: 39.9 ° × 32.3 °;
relative pore diameter D/f': 1/1.
In this embodiment, the parameters of the positive lens a, the negative lens B and the positive lens C are as follows:
in the above table, surface numbers S1, S3, and S5 are mirror surfaces of the lenses viewed from left to right, and surface numbers S2, S4, and S6 are mirror surfaces of the lenses viewed from right to left.
In this embodiment, during assembly, first, the positive lens a10, the spacer 11 and the negative lens B13 are sequentially placed into the main barrel 9, and are pressed and fixed outside the negative lens B13 by the front pressing ring 14, then the positive lens C20 is mounted on the inner wall of the main barrel 9 behind the negative lens B, and is fixed by the rear pressing ring 19, the first telescopic ring 8, the fixing member 7 and the second telescopic ring 6 are sequentially mounted on the outside of the main barrel 9, the movable base 16 with the first sealing ring 12 mounted thereon is mounted on the main barrel 9, the movable base 16 is fixed with the main barrel 9 by the rear stopper ring 18, the elastic gasket 17 is mounted in advance between the movable base 16 and the main barrel 9, finally, the second sealing ring 15 is mounted inside the housing 4, the housing with the second sealing ring is mounted outside the movable base 16, the housing screw 3 penetrating and moving the base is mounted on the housing 4, the cam 2 is mounted on the end of the focusing screw 3, and a limiting ring 1 is arranged between the focusing cam 2 and the moving seat 16, and the fixing screw 5 is arranged on the outer cover, so that the installation is finished. The utility model relates to a rationally, compact structure, camera lens structure length is short, convenient to carry, and the luminousness is high, and the focusing scope is wide, and low in manufacturing cost, is favorable to guaranteeing the air distance between each lens, improves the assembly yields, guarantees the stability of optical axis, reduces the parts machining degree of difficulty, reduces the assembly requirement, strengthens the resistant vibration and the impact resistance of optical lens part, improves the anti-seismic performance of whole camera lens.
Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.
Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.
The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (7)
1. The long-wave mechanical athermalization focusing infrared lens is characterized by comprising a lens barrel, wherein a positive lens A, a negative lens B and a positive lens C are sequentially arranged in the lens barrel along the incident direction of light rays from left to right, the air interval between the positive lens A and the negative lens B is 8.89mm, and the air interval between the negative lens B and the positive lens C is 6.34 mm.
2. The long-wave mechanical athermalization focusing infrared lens according to claim 1, wherein the lens barrel comprises a main lens barrel, the main lens barrel is provided with a mechanical athermalization component, the mechanical athermalization component comprises a first retractable ring and a second retractable ring which are arranged on the main lens barrel, a fixing member is arranged between the first retractable ring and the second retractable ring, the main lens barrel is further provided with a movable seat, the movable seat is provided with a first sealing ring, the main lens barrel is provided with a rear stop ring for fixing the main lens barrel and the movable seat, and an elastic gasket is further arranged between the movable seat and the rear stop ring.
3. The athermal focusing infrared lens of claim 2, wherein the main barrel is provided with a housing at an outer side, the housing is provided with a second sealing ring at an inner side, the housing is provided with a housing and a focusing guide pin of a movable base, the focusing guide pin is provided with a focusing cam, and the second telescopic ring, the fixing member and the first telescopic ring are sequentially located between the housing and the main barrel.
4. The lens assembly of claim 2 or 3, wherein the positive lens A, the negative lens B and the positive lens C are fixed inside the main barrel, and a spacer is disposed between the positive lens A and the negative lens B.
5. The lens assembly of claim 2 or 3, wherein the positive lens C has a rear pressing ring for fixing the positive lens C to the main barrel, and the negative lens B has a front pressing ring for fixing the negative lens B to the main barrel.
6. The athermalized, long-wave mechanical focusing infrared lens of claim 3, wherein a set screw passing through the housing is fixedly attached to the housing.
7. The athermal focusing IR lens of claim 3, wherein a stop ring is disposed between the focusing cam and the main barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920879557.5U CN209979913U (en) | 2019-06-12 | 2019-06-12 | Long-wave mechanical athermal focusing infrared lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920879557.5U CN209979913U (en) | 2019-06-12 | 2019-06-12 | Long-wave mechanical athermal focusing infrared lens |
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| Publication Number | Publication Date |
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| CN209979913U true CN209979913U (en) | 2020-01-21 |
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| CN201920879557.5U Active CN209979913U (en) | 2019-06-12 | 2019-06-12 | Long-wave mechanical athermal focusing infrared lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208920A (en) * | 2019-06-12 | 2019-09-06 | 福建福光天瞳光学有限公司 | A kind of long wave machinery is focused infrared lens and its assembly method without thermalization |
| CN111999842A (en) * | 2020-08-30 | 2020-11-27 | 福建福光天瞳光学有限公司 | f35mm mechanical passive athermalization lens and assembling method thereof |
-
2019
- 2019-06-12 CN CN201920879557.5U patent/CN209979913U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208920A (en) * | 2019-06-12 | 2019-09-06 | 福建福光天瞳光学有限公司 | A kind of long wave machinery is focused infrared lens and its assembly method without thermalization |
| CN110208920B (en) * | 2019-06-12 | 2023-08-15 | 福建福光天瞳光学有限公司 | Long-wave mechanical athermalization focusing infrared lens and assembly method thereof |
| CN111999842A (en) * | 2020-08-30 | 2020-11-27 | 福建福光天瞳光学有限公司 | f35mm mechanical passive athermalization lens and assembling method thereof |
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