CN209542936U - A kind of auto-manual focusing infrared lens - Google Patents
A kind of auto-manual focusing infrared lens Download PDFInfo
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- CN209542936U CN209542936U CN201822255076.5U CN201822255076U CN209542936U CN 209542936 U CN209542936 U CN 209542936U CN 201822255076 U CN201822255076 U CN 201822255076U CN 209542936 U CN209542936 U CN 209542936U
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Abstract
The utility model relates to a kind of auto-manual focusing infrared lens, and the optical system of the camera lens includes negative crescent moon lens A, biconvex lens B and positive crescent moon lens C；Airspace between the negative crescent moon lens A and biconvex lens B is 14.84mm, and the airspace between positive crescent moon lens B and positive crescent moon lens C is 16.96 ~ 17.66mm；The radius of curvature of mirror surface is 23.36mm before positive crescent moon lens A, and the radius of curvature of rear mirror surface is 15.3mm, with a thickness of 2.85mm；The radius of curvature of mirror surface is 123.59mm before biconvex lens B, and the radius of curvature of rear mirror surface is 129.05mm, with a thickness of 2.83mm；The lens construction is compact, entire length is short, easy to carry, and image quality is high, has high transmittance, can be adapted to 640 × 512,17 μm of detectors of LWIR Uncooled, not only be able to achieve manual focusing, but also be able to achieve electromotion focusing, practical.
Description
Technical field
The utility model relates to a kind of auto-manual focusing infrared lens.
Background technique
From the 1990s, non-refrigeration type thermal infrared imager has quickly entered application market, red with refrigeration-type
Outer thermal imaging system is compared, Uncooled infrared camera have high reliablity, at low cost, small power consumption, light-weight, miniaturization, starting it is fast,
The advantages that easy to use and flexible.Compared with visible light security lens, infrared acquisition penetrates the energy such as cigarette, mist, haze, snow with certain
Power and the ability of identification camouflage, are not interfered and blinding by the strong light in battlefield, flash of light, remote, round-the-clock observation may be implemented, especially
It is suitable for the target acquisitions under night and bad-weather condition.And un-cooled infrared focal plane array technology is by small-scale
In developing to, it is extensive, pixel has also narrowed down to 17 μm or even 12 μm by 50 μm, its resolution ratio and sensitivity significantly improves
?.So with the development of science and technology, infrared imagery technique has been widely used in fields such as national defence, industry, medical treatment.
In certain specific safety-security areas, night patrol gradually is carried out using infrared lens, is allowed to the increase of security protection reliability.
Infrared focusing lens are directed to, to a certain extent, precision is less than electromotion focusing to manual focusing, and electromotion focusing can compare hand
Automatic focusing function may be implemented in dynamic more accurate and electromotion focusing of focusing.And temperature not only can be to the refractive index of optical material
Impact also can cause to expand with heat and contract with cold to lens barrel material, and power variation and optimum image plane is caused to shift, and reduce optics
Image quality, image is smudgy, contrast decline, the final imaging performance for influencing camera lens.
Utility model content
In view of this, the purpose of the utility model is to provide a kind of image quality height, the auto-manual with high transmittance
Focusing infrared lens.
The utility model is realized using following scheme: a kind of auto-manual focusing infrared lens, the optical system of the camera lens
System includes along light incident direction is set gradually from front to back negative crescent moon lens A, biconvex lens B and positive crescent moon lens C；It is described
Airspace between negative crescent moon lens A and biconvex lens B is 14.84mm, between positive crescent moon lens B and positive crescent moon lens C
Airspace is 16.96 ~ 17.66mm；The radius of curvature of mirror surface is 23.36mm, the radius of curvature of rear mirror surface before positive crescent moon lens A
For 15.3mm, with a thickness of 2.85mm；The radius of curvature of mirror surface is 123.59mm before biconvex lens B, and the radius of curvature of rear mirror surface is
129.05mm with a thickness of 2.83mm；The radius of curvature of mirror surface is 46.1mm before positive crescent moon lens C, and the radius of curvature of rear mirror surface is
154.08mm with a thickness of 2.56mm.
Further, negative crescent moon lens A, biconvex lens B and positive crescent moon lens C three's material are germanium.
Further, the mechanical structure of the camera lens includes that inside is equipped with negative crescent moon lens A, biconvex lens B and the first month of the lunar year
The body tube of tooth lens C, be equipped with can be with respect to the Mobile base that body tube slides back and forth, the positive crescent moon lens at rear portion in body tube
C is installed on Mobile base, and focusing cam is cased with outside the body tube rear portion, is adjusted cam side and is provided with driving focusing cam turn
Dynamic focusing motor, the focusing cam drive Mobile base to be moved forward and backward by focusing guide pin.
Further, body tube front end periphery is fixedly connected with preceding cylinder base, and primary mirror tube rear end periphery is fixedly connected with
Cylinder base afterwards is provided with the focusing ring that can be rotated relative to preceding cylinder base and rear cylinder base, positioned at adjusting ring between preceding cylinder base and rear cylinder base
Inside is provided with the turning set that rotation is driven by focusing ring, and the turning set rear end is provided with magnet, installs on the rear cylinder base
There is the FPC circuit board being oppositely arranged with magnet, the Hall biography to induced magnet rotational angle is provided on the FPC circuit board
Sensor, Hall sensor are electrically connected with the control chip on FPC circuit board, and the control chip is electrically connected with the focusing motor
It connects.
Further, the bearing positioned at turning set front end is installed on the rear cylinder base, is equipped with axis in the middle part of the bearing
Nail is held, the turning set is set in the bearing and nails on, and outer on the turning set to be cased with rubber ring, the rubber ring is close to tune
Burnt ring medial surface.
Further, for the focusing cam between rear cylinder base and body tube, the focusing motor is installed on rear cylinder base
Rear end is equipped with the motor gear being meshed with the gear ring on focusing cam on the main shaft for motor of focusing；On the focusing cam
Side is threaded with limit auxiliary nail, and limit retaining screw is threaded on the upside of focusing cam, is circumferentially opened up on the rear cylinder base
There is the limiting slot respectively with limit auxiliary nail and limit retaining screw cooperation.
Further, the body tube front end is provided with mirror cover component, and the mirror cover component includes before being connected in body tube
The annular fixing member at end, the circular connector for being fixedly connected on annular fixing member front end, circular connector front end is hinged with can be to
The mirror cover of upper opening, the annular fixing member front end are also fixedly connected on the inside of circular connector and head on mirror cover medial surface
Mirror cover block.
Compared with prior art, the utility model has the following beneficial effects: the focusing of the utility model auto-manual is infrared
Lens construction is compact, entire length is short, easy to carry, and image quality is high, has high transmittance, can be with LWIR Uncooled
640 × 512,17 μm of detector adaptations, carry out document recording and monitor task, and cost of manufacture is cheap, is suitble to large-scale production；Both
It is able to achieve manual focusing, and is able to achieve electromotion focusing, it is practical.
For the purpose of this utility model, technical solution and advantage is more clearly understood, specific embodiment will be passed through below
And relevant drawings, the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the schematic diagram of optical system of the utility model embodiment；
Fig. 2 is the utility model embodiment mechanical structure sectional view；
Figure label illustrates: 1- mirror cover, 2- circular connector, 3- mirror cover block, 4- annular fixing member, cylinder base before 5-, 6-
Cover board, 7- rosette, 8- bearing nail, 9- bearing, 10- turning set, 11- magnet, 12- rubber ring, 13- focusing ring, 14- limit are auxiliary
Help nail, 15-FPC circuit board, cylinder base after 16-, 17- motor gear, negative crescent moon lens A, the 19- spacer ring of 18-, 20- biconvex lens B,
The first pressing ring of 21-, 22- limit retaining screw, 23- focusing guide pin, 24- Mobile base, the second pressing ring of 25-, 26- positive crescent moon lens C, 27-
Focusing motor, 28- body tube, 29- focusing cam.
Specific embodiment
As shown in Figure 1 and 2, a kind of auto-manual is focused infrared lens, the optical system of the camera lens include along light before
Negative crescent moon lens A, biconvex lens B and positive crescent moon lens C that incident direction is set gradually backward；The negative crescent moon lens A and double
Airspace between convex lens B is 14.84mm, the airspace between positive crescent moon lens B and positive crescent moon lens C is 16.96 ~
17.66mm；The radius of curvature of mirror surface is 23.36mm before positive crescent moon lens A, and the radius of curvature of rear mirror surface is 15.3mm, with a thickness of
2.85mm；The radius of curvature of mirror surface is 123.59mm before biconvex lens B, and the radius of curvature of rear mirror surface is 129.05mm, with a thickness of
2.83mm；The radius of curvature of mirror surface is 46.1mm before positive crescent moon lens C, and the radius of curvature of rear mirror surface is 154.08mm, with a thickness of
2.56mm；The auto-manual is focused, and infrared lens are compact-sized, and entire length is short, easy to carry, have a high transmittance, and can be with
It being adapted to 640 × 512,17 μm of detectors of LWIR Uncooled, carries out document recording and monitor task, cost of manufacture is cheap,
It is suitble to large-scale production.
In the present embodiment, negative crescent moon lens A, biconvex lens B and positive crescent moon lens C three's material are germanium.
Following optical index has been reached by the optical system that above-mentioned lens set is constituted:
1, service band: 8 μm -12 μm；
2, focal length: f '=11.5mm；
3, detector: 640 × 512,17 μm of LWIR Uncooled type；
4, field angle: 53.6 ° × 43.2 °；
5, relative aperture D/ f ': 1/1.
In the present embodiment, the mechanical structure of the camera lens includes that inside is equipped with negative crescent moon lens A18, biconvex lens
The body tube 28 of B20 and positive crescent moon lens C26, be equipped with can be with respect to the Mobile base that body tube slides back and forth at rear portion in body tube 28
24, the positive crescent moon lens C is installed on Mobile base 24, and focusing cam 29 is cased with outside 28 rear portion of body tube, adjusts cam
29 sides are provided with the focusing motor 27 of driving focusing cam rotation, and the focusing cam 27 drives movement by focusing guide pin 23
Seat 24 is moved forward and backward, and offers curved groove on focusing cam, and body tube side wall offers straight-line groove, focusing guide pin from curved groove and
It is passed through in straight-line groove, converts the rotary motion of focusing cam to the axial movement of Mobile base.
In the present embodiment, cylinder base 5 before the 28 front end periphery of body tube is fixedly connected with, primary mirror tube rear end periphery is fixed
It is connected with rear cylinder base 16, the focusing ring 13 that can be rotated relative to preceding cylinder base and rear cylinder base is provided between preceding cylinder base 5 and rear cylinder base 16,
The turning set 10 that rotation is driven by focusing ring is provided with positioned at the inside for adjusting ring 13,10 rear end of turning set is provided with magnet
11, the FPC circuit board 15 being oppositely arranged with magnet 11 is installed on cylinder base 16 after described, is provided on the FPC circuit board 15
Control to the Hall sensor (not shown) of 11 rotational angle of induced magnet, on Hall sensor and FPC circuit board 15
The electrical connection of coremaking piece, the control chip are electrically connected with the focusing motor 27；The camera lens collection manual focusing and electromotion focusing
With one, it is not only able to achieve manual focusing, but also is able to achieve electromotion focusing, it is practical；By rotating focusing ring manually, focusing ring with
The contact of rubber ring can drive turning set to rotate and then drive magnet rotors, by the rotation of Hall sensor induced magnet, from
And control chip is fed back to, it is allowed to control motor actuation.
In the present embodiment, the bearing 9 positioned at turning set front end, 9 middle part of bearing are installed on the rear cylinder base 16
It is equipped with bearing nail 8, the turning set 10 is set on the bearing nail 8, outer on the turning set 10 to be cased with rubber ring 12, institute
It states rubber ring 12 and is close to focusing ring medial surface, realize the power transmission between focusing ring and swivel becket, transmission using frictional force
Structure is simple, and manufacturing cost is low, and operating noise is small.
The camera lens directly passes through control focusing motor rotation and focusing cam rotation is driven to focus, can also be by manual
Focusing ring is rotated, focusing ring is allowed to by rubber ring and drives turning set rotation, and then magnet is made to rotate, FPC circuit board 15
On Hall sensor can sense the angle that magnet is turned over, feed back to control chip, pass through control chip controls focusing
Motor rotation, reaches lens focusing function.
In the present embodiment, the focusing cam 29 is between rear cylinder base 16 and body tube 28, the focusing motor 27
It is installed on rear 16 rear end of cylinder base, the motor gear being meshed with the gear ring on focusing cam is installed on the main shaft for motor 27 of focusing
17；It is threaded with limit auxiliary nail 14 on the upside of the focusing cam 29, is threaded with limit retaining screw 22 on the upside of focusing cam,
The limiting slot respectively with limit auxiliary nail and limit retaining screw cooperation is circumferentially offered after described on cylinder base.
In the present embodiment, 28 front end of body tube is provided with mirror cover component, and the mirror cover component includes being connected in master
The annular fixing member 4 of lens barrel front end, the circular connector 2 for being fixedly connected on annular fixing member front end, circular connector front end hinge
It is connected to the mirror cover 1 of upwardly-openable, the annular fixing member front end is also fixedly connected on the inside of circular connector and heads on
The mirror cover block 3 of mirror cover medial surface.
In the present embodiment, it under the premise of guaranteeing compact-sized, adopts a series of measures, improves camera lens vibration resistance, punching
The ability hit, and during lens assembling, mechanical parts interworking uses built-in bead screw close-fitting, to reach in appearance
Requirement, although components are more, entire camera lens is exposed without any screw in overall appearance.
Above-mentioned any technical solution disclosed in the utility model unless otherwise stated, if it discloses numberical range,
So disclosed numberical range is preferred numberical range, and any it should be appreciated by those skilled in the art preferred numerical value
Range is only the numerical value that technical effect is obvious or representative in many enforceable numerical value.Since numerical value is more,
It is impossible to exhaust, so the utility model discloses component values just to illustrate the technical solution of the utility model, also, above-mentioned
The numerical value enumerated should not constitute the limitation that protection scope is created to the utility model.
If the utility model is open or relates to the components or structural member of connection fastened to each other, except as otherwise sound
It is bright outer, it is fixedly connected it is to be understood that connection (such as using bolt or screw connection) can be removedly fixed, can also manage
Solution are as follows: it is non-removable to be fixedly connected with (such as riveting, welding), certainly, connection fastened to each other or integral structure (
Such as manufactured using casting technique is integrally formed) replaced (obviously can not be using except integrally formed technique).
In addition, for indicating positional relationship or shape applied in above-mentioned any technical solution disclosed by the utility model
Term its meaning includes approximate with its, similar or close state or shape unless otherwise stated.
Either component provided by the utility model by multiple individual component parts either assembled, or
The separate part that integrally formed technique manufactures.
Finally it should be noted that: above embodiments are only to illustrate the technical solution of the utility model rather than limit it
System；Although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should
Understand: specific implementation of the utility model can still be modified or is equally replaced to some technical characteristics
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (7)
- The infrared lens 1. a kind of auto-manual is focused, it is characterised in that: the optical system of the camera lens includes along light from forward direction Negative crescent moon lens A, biconvex lens B and positive crescent moon lens C that incident direction is set gradually afterwards；The negative crescent moon lens A and biconvex Airspace between lens B is 14.84mm, the airspace between positive crescent moon lens B and positive crescent moon lens C is 16.96 ~ 17.66mm；The radius of curvature of mirror surface is 23.36mm before positive crescent moon lens A, and the radius of curvature of rear mirror surface is 15.3mm, with a thickness of 2.85mm；The radius of curvature of mirror surface is 123.59mm before biconvex lens B, and the radius of curvature of rear mirror surface is 129.05mm, with a thickness of 2.83mm；The radius of curvature of mirror surface is 46.1mm before positive crescent moon lens C, and the radius of curvature of rear mirror surface is 154.08mm, with a thickness of 2.56mm。
- The infrared lens 2. auto-manual according to claim 1 is focused, it is characterised in that: negative crescent moon lens A, biconvex lens B and positive crescent moon lens C three's material are germanium.
- The infrared lens 3. auto-manual according to claim 1 or 2 is focused, it is characterised in that: the mechanical knot of the camera lens Structure includes the internal body tube for being equipped with negative crescent moon lens A, biconvex lens B and positive crescent moon lens C, and rear portion is equipped in body tube It can be installed on Mobile base with respect to the Mobile base that body tube slides back and forth, the positive crescent moon lens C, body tube rear portion housing There is focusing cam, adjust the focusing motor that cam side is provided with driving focusing cam rotation, the focusing cam passes through focusing Guide pin drives Mobile base to be moved forward and backward.
- The infrared lens 4. auto-manual according to claim 3 is focused, it is characterised in that: body tube front end periphery is solid Surely it is connected with preceding cylinder base, primary mirror tube rear end periphery is fixedly connected with rear cylinder base, and being provided between preceding cylinder base and rear cylinder base can be opposite The focusing ring of preceding cylinder base and the rotation of rear cylinder base is provided with the turning set that rotation is driven by focusing ring, institute positioned at adjusting on the inside of ring It states turning set rear end and is provided with magnet, the FPC circuit board being oppositely arranged with magnet, the FPC electricity are installed on the rear cylinder base The Hall sensor to induced magnet rotational angle, the control core on Hall sensor and FPC circuit board are provided on the plate of road Piece electrical connection, the control chip are electrically connected with the focusing motor.
- The infrared lens 5. auto-manual according to claim 4 is focused, it is characterised in that: be equipped with position on cylinder base after described Bearing in turning set front end, the bearing middle part are equipped with bearing nail, and the turning set is set in the bearing and nails on, described Outer on turning set to be cased with rubber ring, the rubber ring is close to focusing ring medial surface.
- The infrared lens 6. auto-manual according to claim 4 is focused, it is characterised in that: the focusing cam is located at rear cylinder Between seat and body tube, the focusing motor is installed on rear cylinder base rear end, is equipped on the main shaft for motor of focusing and focusing cam On the motor gear that is meshed of gear ring；Limit auxiliary nail, spiral shell on the upside of focusing cam are threaded on the upside of the focusing cam Line is connected with limit retaining screw, circumferentially offers the limit cooperated respectively with limit auxiliary nail and limit retaining screw on the rear cylinder base Slot.
- The infrared lens 7. auto-manual according to claim 3 is focused, it is characterised in that: the body tube front end is provided with Mirror cover component, before the mirror cover component includes the annular fixing member for being connected in body tube front end, is fixedly connected on annular fixing member The circular connector at end, circular connector front end are hinged with the mirror cover of upwardly-openable, and the annular fixing member front end is also fixed It is connected with the mirror cover block for being located on the inside of circular connector and heading on mirror cover medial surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822255076.5U CN209542936U (en) | 2018-12-29 | 2018-12-29 | A kind of auto-manual focusing infrared lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822255076.5U CN209542936U (en) | 2018-12-29 | 2018-12-29 | A kind of auto-manual focusing infrared lens |
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| Publication Number | Publication Date |
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| CN209542936U true CN209542936U (en) | 2019-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822255076.5U Active CN209542936U (en) | 2018-12-29 | 2018-12-29 | A kind of auto-manual focusing infrared lens |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109407285A (en) * | 2018-12-29 | 2019-03-01 | 福建福光天瞳光学有限公司 | A kind of auto-manual focusing infrared lens and its working method |
| CN112919222A (en) * | 2021-03-26 | 2021-06-08 | 上海誉亿建筑安装工程有限公司 | Manual-automatic's line machine of starting |
| CN115663570A (en) * | 2022-12-14 | 2023-01-31 | 成都量芯集成科技有限公司 | Laser spot distribution adjusting structure and method |
-
2018
- 2018-12-29 CN CN201822255076.5U patent/CN209542936U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109407285A (en) * | 2018-12-29 | 2019-03-01 | 福建福光天瞳光学有限公司 | A kind of auto-manual focusing infrared lens and its working method |
| CN112919222A (en) * | 2021-03-26 | 2021-06-08 | 上海誉亿建筑安装工程有限公司 | Manual-automatic's line machine of starting |
| CN115663570A (en) * | 2022-12-14 | 2023-01-31 | 成都量芯集成科技有限公司 | Laser spot distribution adjusting structure and method |
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