CN210199381U - Infrared lens with detachable sealing structure - Google Patents
Infrared lens with detachable sealing structure Download PDFInfo
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- CN210199381U CN210199381U CN201921026210.2U CN201921026210U CN210199381U CN 210199381 U CN210199381 U CN 210199381U CN 201921026210 U CN201921026210 U CN 201921026210U CN 210199381 U CN210199381 U CN 210199381U
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Abstract
The utility model relates to an infrared lens with a detachable sealing structure, which comprises a main lens cone, a front lens base and a focusing lens base; a positive crescent lens A is arranged in the front lens base, a negative crescent lens B is arranged in the focusing lens base, and a positive crescent lens C is arranged at the rear end of the main lens cone; the air space between the positive crescent lens A and the negative crescent lens B is 35.42-37.42mm, and the air space between the negative crescent lens B and the positive crescent lens C is 16.68-18.68 mm; the front lens base is internally provided with a sealing ring positioned on the periphery of the front end of the orthodontic lens A, an annular gasket for pressing the sealing ring and an A-piece pressing ring for pressing the annular gasket. The infrared lens has good sealing performance, is convenient to disassemble, is easy to repair subsequently, and is suitable for secondary operation; and has the advantages of compact structure, light weight, short overall length, convenient carrying and the like.
Description
Technical Field
The utility model relates to an infrared camera lens with detachable seal structure belongs to optics technical field.
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. Therefore, the requirements of water resistance, moisture resistance and air tightness are provided for the infrared lens, and the surfaces and elements are protected from the harmful reaction of moisture and atmospheric components.
At present, because the whole size of the infrared lens is larger, a sealing mode that sealant is filled between a lens and a pressing ring is mainly adopted, and the pressing ring is used for fixing; the mode has the advantages of good sealing performance and high reliability, and can be suitable for lenses of various sizes; however, the sealing structure is difficult to repair and troublesome to disassemble in actual production and is not suitable for secondary operation.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an infrared camera lens that has detachable seal structure that the leakproofness is good, and it is convenient to dismantle, the follow-up reprocessing of being convenient for.
The utility model discloses a following scheme realizes: an infrared lens with a detachable sealing structure comprises a main lens cone, wherein the front end of the main lens cone is provided with a front lens base, and a focusing lens base capable of moving back and forth is arranged in the main lens cone; a positive crescent lens A is arranged in the front lens base, a negative crescent lens B is arranged in the focusing lens base, and a positive crescent lens C is arranged at the rear end of the main lens cone; the air space between the positive crescent lens A and the negative crescent lens B is 35.42-37.42mm, and the air space between the negative crescent lens B and the positive crescent lens C is 16.68-18.68 mm; the front lens base is internally provided with a sealing ring positioned on the periphery of the front end of the orthodontic lens A, an annular gasket for pressing the sealing ring and an A-piece pressing ring for pressing the annular gasket.
Furthermore, the curvature radiuses of the front mirror surface and the rear mirror surface of the positive crescent lens A are 69.3mm and 96.2mm respectively, and the thickness is 7 mm; the front mirror surface of the negative crescent lens B is an aspheric surface with the curvature radius of 39.5mm and the thickness of 4.2 mm; the radius of curvature of the front mirror surface and the rear mirror surface of the positive crescent C are 47.6mm and 66.4mm respectively, and the thickness is 3 mm.
Furthermore, a focusing cam is sleeved outside the middle part of the main lens cone and drives the focusing lens base to move back and forth through a focusing guide pin; and a focusing motor and a microswitch are respectively arranged on two opposite sides of the focusing cam, and an adjusting gear on a main shaft of the focusing motor is meshed with an outer gear ring of the focusing cam.
Furthermore, the front lens base, the focusing lens base and the rear end of the main lens cone are respectively provided with hole steps which are propped against the outer edge parts of the rear ends of the positive crescent lens A, the negative crescent lens B and the positive crescent lens C; a B-piece pressing ring for pressing the outer edge part of the front end of the negative crescent lens B is arranged in the focusing lens base, and a C-piece pressing ring for pressing the outer edge part of the front end of the positive crescent lens C is arranged in the rear end of the main lens cone; and a cam pressing ring which is positioned at the rear end of the focusing cam and used for fixing the axial position of the focusing cam is arranged on the outer side of the main lens barrel.
Compared with the prior art, the utility model discloses following beneficial effect has: the infrared lens of the utility model has good sealing performance, stability and reliability, and convenient disassembly, the lens can be replaced for the second time, is easy to be repaired later, is suitable for the secondary operation, and well solves the problems existing in the sealing by adopting the sealant; meanwhile, the long-wave infrared uncooled optical fiber monitoring system has the advantages of compact structure, light weight, short overall length, convenience in carrying and the like, the size of the lens is greatly reduced, the long-wave infrared uncooled optical fiber monitoring system can be matched with a long-wave infrared uncooled 640 x 512 and 14 mu m detector to perform live recording and monitoring tasks, the manufacturing cost is low, and the large-scale production is suitable.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.
Drawings
Fig. 1 is a schematic view of the internal structure of the embodiment of the present invention;
FIG. 2 is a perspective view of an embodiment of the present invention;
FIG. 3 is a schematic view of a portion of the configuration of FIG. 1;
the reference numbers in the figures illustrate: the lens comprises a 1-A piece pressing ring, a 2-annular gasket, a 3-sealing ring, a 4-front lens base, a 5-main lens cone, a 6-focusing lens base, a 7-B piece pressing ring, an 8-focusing cam, a 9-cam pressing ring, a 10-C piece pressing ring, a 11-positive crescent lens A, a 12-negative crescent lens B, a 13-positive crescent lens C, a 14-focusing motor, a 15-microswitch rack and a 16-microswitch.
Detailed Description
As shown in fig. 1 to 3, an infrared lens with a detachable sealing structure includes a main lens barrel 5, a front lens base 4 is installed at the front end of the main lens barrel 5, and a focusing lens base 6 capable of moving forward and backward is installed in the main lens barrel 5; a positive crescent A11 is installed in the front lens seat 4, a negative crescent B12 is installed in the focusing lens seat, a positive crescent C13 is installed at the rear end of the main lens cone, and high-temperature and low-temperature compensation is realized by adjusting the front and rear positions of the negative crescent B12; the air space between the positive crescent lens A and the negative crescent lens B is 35.42-37.42mm, and the air space between the negative crescent lens B and the positive crescent lens C is 16.68-18.68 mm; a sealing ring 3 positioned on the periphery of the front end of the positive crescent lens A11, an annular gasket 2 for pressing the sealing ring 3 and an A piece pressing ring 1 for pressing the annular gasket are arranged in the front lens seat 4; an annular gasket is arranged between the sealing ring and the pressing ring A, so that the sealing ring can be prevented from losing efficacy due to deformation of the sealing ring under the action of rotating force in the assembling process; the sealing mode has the advantages of good sealing performance, stability, reliability, convenient disassembly, secondary lens replacement, easy follow-up repair, suitability for secondary operation and good solution to the problem of sealing by adopting the sealant.
In the embodiment, the curvature radii of the front mirror surface and the rear mirror surface of the positive crescent A11 are 69.3mm and 96.2mm respectively, the thickness is 7mm, the refractive index is 4, and the material is germanium; the front mirror surface of the negative crescent lens B12 is an aspheric surface with the curvature radius of 39.5mm and the refractive index of 2.78 and is made of chalcogenide, and the rear mirror surface of the negative crescent lens is an aspheric surface with the thickness of 4.2 mm; the radius of curvature of the front mirror surface and the radius of curvature of the rear mirror surface of the positive crescent C13 are 47.6mm and 66.4mm respectively, the thickness is 3mm, the refractive index is 4, and the material is germanium.
In the present embodiment, the surface form equation of the rear mirror surface of the negative crescent lens B12 is as follows:
z represents the position in the optical axis direction, r represents the height in the vertical direction with respect to the optical axis, c represents the radius of curvature, k represents the conic coefficient, A2、A4、A6、A8、A10Represents an aspheric coefficient; wherein A is2=-4.216E-05，A4=-1.188E-007，A6=1.8937E-011，A8=-3.67E-014，A10=1.7115E-017, E-n in aspherical coefficient stands "
", e.g., -4.216E-05 for-4.21 x 10-5。
The optical system formed by the lens group achieves the following technical indexes:
(1) the working wave band is as follows: 8-12 μm;
(2) focal length: f' =73 mm;
(3) a detector: the long-wave infrared non-refrigeration type is 640 multiplied by 512, 12 mu m;
(4) the field angle: 6.0 ° × 4.8 °;
(5) relative pore diameter D/f': 1/1, respectively; .
The utility model discloses infrared camera lens has advantages such as compact structure, light in weight, whole length are short, convenient to carry, has compressed the size of camera lens greatly, can with long wave infrared uncooled 640 x 512, 14 mu m detector adaptation, carry out live record and monitor task, and preparation low cost is fit for the large-scale production moreover.
In this embodiment, a focusing cam 8 is sleeved outside the middle part of the main lens barrel 5, the focusing cam 8 drives the focusing lens base 6 to move back and forth through a focusing guide pin, and the focusing guide pin passes through a curve groove on the focusing cam and a straight line groove on the main lens barrel; a focusing motor 14 and a microswitch 15 are respectively arranged on two opposite sides of the focusing cam 8, an adjusting gear on a main shaft of the focusing motor 14 is meshed with an outer gear ring of the focusing cam 8, the focusing motor is fixed on a motor frame, the motor frame is fixed on a main lens barrel, the microswitch is directly fixed on the main lens barrel through the microswitch frame, and a stop nail fixed on the focusing cam is contacted with the microswitch so as to control the start and stop of the focusing motor and limit the movement of a focusing lens base; during operation, the focusing lens base moves forwards or backwards through positive rotation or reverse rotation of the focusing motor, focusing of the lens is achieved, in the later assembling and adjusting process, the motor frame is convenient to disassemble, a more compact structure can be achieved, and the layout of electric elements can be completed in a minimum space.
In this embodiment, the focusing lens base adopts three-point centering principle, reduces the area of contact between focusing lens base and the main lens cone, has reduced when having reduced the weight of part and has submitted the lens base and remove the in-process resistance, adopts cascaded design, increases the area of contact of negative crescent lens B12 and focusing lens base, guarantees the stability of installation.
In this embodiment, the front lens holder 4, the focusing lens holder 6 and the rear end of the main barrel 5 are respectively provided with a hole step which is pressed against the outer edge portions of the rear ends of the positive crescent lens a11, the negative crescent lens B12 and the positive crescent lens C13; a B-piece pressing ring 7 which presses the outer edge part of the front end of a negative crescent lens B12 is arranged in the focusing lens base 6, and a C-piece pressing ring 10 which presses the outer edge part of the front end of a positive crescent lens C13 is arranged in the rear end of the main lens barrel 5; a cam pressing ring 9 which is positioned at the rear end of the focusing cam and used for fixing the axial position of the focusing cam is arranged on the outer side of the main lens barrel; the A-piece pressing ring, the B-piece pressing ring, the C-piece pressing ring and the cam pressing ring are in threaded connection with the main lens barrel, and shellac is injected at all threaded matching positions on the main lens barrel.
The utility model discloses infrared camera lens's assembly process: the orthodontic lens C13 is arranged at the rear end of the main lens cone and is fixed by a C-piece pressing ring, and then the focusing lens base is connected with the main lens cone and the focusing cam by a focusing guide pin and screwed into the cam pressing ring to limit the axial position of the focusing cam; the negative crescent lens B12 is arranged in the focusing lens seat and is fixed through a B-piece pressing ring; and finally, fixedly mounting the front lens base at the front end of the main lens cone by using screws, and loading the orthodontic lens A11 into the front lens base and sequentially loading a sealing ring, an annular gasket and an A-piece pressing ring.
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.
The utility model discloses if disclose or related to mutual 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).
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 (4)
1. The utility model provides an infrared camera lens with detachable seal structure which characterized in that: the focusing lens comprises a main lens barrel, wherein a front lens base is arranged at the front end of the main lens barrel, and a focusing lens base capable of moving back and forth is arranged in the main lens barrel; a positive crescent lens A is arranged in the front lens base, a negative crescent lens B is arranged in the focusing lens base, and a positive crescent lens C is arranged at the rear end of the main lens cone; the air space between the positive crescent lens A and the negative crescent lens B is 35.42-37.42mm, and the air space between the negative crescent lens B and the positive crescent lens C is 16.68-18.68 mm; the front lens base is internally provided with a sealing ring positioned on the periphery of the front end of the orthodontic lens A, an annular gasket for pressing the sealing ring and an A-piece pressing ring for pressing the annular gasket.
2. The infrared lens having a detachable sealing structure according to claim 1, wherein: the curvature radiuses of the front mirror surface and the rear mirror surface of the positive crescent lens A are 69.3mm and 96.2mm respectively, and the thickness is 7 mm; the front mirror surface of the negative crescent lens B is an aspheric surface with the curvature radius of 39.5mm and the thickness of 4.2 mm; the radius of curvature of the front mirror surface and the rear mirror surface of the positive crescent C are 47.6mm and 66.4mm respectively, and the thickness is 3 mm.
3. The infrared lens having a detachable sealing structure according to claim 1, wherein: a focusing cam is sleeved outside the middle part of the main lens cone and drives the focusing lens base to move back and forth through a focusing guide pin; and a focusing motor and a microswitch are respectively arranged on two opposite sides of the focusing cam, and an adjusting gear on a main shaft of the focusing motor is meshed with an outer gear ring of the focusing cam.
4. The infrared lens having a detachable sealing structure according to claim 3, wherein: the front lens base, the focusing lens base and the rear end of the main lens cone are respectively provided with a hole step which is propped against the outer edge parts of the rear ends of the positive crescent lens A, the negative crescent lens B and the positive crescent lens C; a B-piece pressing ring for pressing the outer edge part of the front end of the negative crescent lens B is arranged in the focusing lens base, and a C-piece pressing ring for pressing the outer edge part of the front end of the positive crescent lens C is arranged in the rear end of the main lens cone; and a cam pressing ring which is positioned at the rear end of the focusing cam and used for fixing the axial position of the focusing cam is arranged on the outer side of the main lens barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921026210.2U CN210199381U (en) | 2019-07-03 | 2019-07-03 | Infrared lens with detachable sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921026210.2U CN210199381U (en) | 2019-07-03 | 2019-07-03 | Infrared lens with detachable sealing structure |
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| Publication Number | Publication Date |
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| CN210199381U true CN210199381U (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921026210.2U Active CN210199381U (en) | 2019-07-03 | 2019-07-03 | Infrared lens with detachable sealing structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261982A (en) * | 2019-07-03 | 2019-09-20 | 福建福光天瞳光学有限公司 | Infrared lens and its assembly method with detachable-type sealed structure |
| CN113946027A (en) * | 2021-09-16 | 2022-01-18 | 茂莱（南京）仪器有限公司 | Combined lens base suitable for assembling concave lens |
| CN115407474A (en) * | 2022-08-30 | 2022-11-29 | 福建福光股份有限公司 | Waterproof lens |
-
2019
- 2019-07-03 CN CN201921026210.2U patent/CN210199381U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261982A (en) * | 2019-07-03 | 2019-09-20 | 福建福光天瞳光学有限公司 | Infrared lens and its assembly method with detachable-type sealed structure |
| CN113946027A (en) * | 2021-09-16 | 2022-01-18 | 茂莱（南京）仪器有限公司 | Combined lens base suitable for assembling concave lens |
| CN115407474A (en) * | 2022-08-30 | 2022-11-29 | 福建福光股份有限公司 | Waterproof lens |
| CN115407474B (en) * | 2022-08-30 | 2024-05-31 | 福建福光股份有限公司 | Waterproof lens |
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