CN105353489B - A kind of f35mm machineries passive type is without thermalization camera lens - Google Patents
A kind of f35mm machineries passive type is without thermalization camera lens Download PDFInfo
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- CN105353489B CN105353489B CN201510916287.7A CN201510916287A CN105353489B CN 105353489 B CN105353489 B CN 105353489B CN 201510916287 A CN201510916287 A CN 201510916287A CN 105353489 B CN105353489 B CN 105353489B
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- lens
- body tube
- coupling tunnel
- positive lens
- camera lens
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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- Lens Barrels (AREA)
Abstract
The present invention relates to a kind of f35mm machineries passive type without thermalization camera lens and its assembly method, including optical system and mechanical structure, in the optical system of the camera lens positive lens A, negative lens B and positive lens C are disposed with along light incident direction, the mechanical structure of the camera lens includes the preceding lens barrel and body tube that are set gradually along light incident direction, the preceding lens barrel is fixedly connected with body tube, positive lens A is equipped in the preceding lens barrel, negative lens B and positive lens C are equipped in the body tube.The camera lens is during optical structure design, reasonable distribution focal power, positive lens A is pushed to move by the lens barrel combination of materials of the different coefficients of expansion, to compensate image planes drift, realize that the mechanical passive type of temperature self-adaptation without thermalization, enables infrared optical system to keep good image quality within the scope of a larger temperature, it can be with LWIR Uncooled type 640 × 480,17 μm of detector adaptations, carry out document recording and monitor task.
Description
Technical field
The present invention relates to a kind of f35mm machineries passive type without thermalization camera lens and its assembly method.
Background technology
Under different environment temperatures, optical material and mechanical material generation are expanded with heat and contract with cold so that lens thickness and air
Change occurred at intervals, the refractive index of optical material can also change with temperature, and then the optimum image plane of system is made to occur partially
From reduction quality of optical imaging, image is smudgy, and contrast declines, the final imaging performance for influencing camera lens.
Since infrared lens have good in anti-interference performance；Night operating distance is remote；It is strong to penetrate flue dust, haze ability；It can be complete
Weather, round-the-clock work；With the observation of multiple target panorama, tracking and target identification ability and good anti-target stealth ability etc.
Advantage, the application of infrared lens are also more and more extensive.But infrared lens are to the susceptibility of temperature, compare more quick for visible ray
Sense.In order to adapt to special application scenario, also camera lens is required to adapt to adverse circumstances, there is temperature self-adaptation ability, and it is current
Such camera lens type is less in the market, it is impossible to meet the needs of market.
Invention content
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of simple in structure, can realize object lens of large relative aperture,
F35mm machinery passive type of the mechanical passive type without thermalization and high transmittance is without thermalization camera lens and its assembly method.
To achieve these goals, a technical solution of the invention is：A kind of f35mm machineries passive type without thermalization camera lens,
Including optical system and mechanical structure, positive lens A is disposed with along light incident direction in the optical system of the camera lens, born
Lens B and positive lens C, the mechanical structure of the camera lens include the preceding lens barrel and body tube that are set gradually along light incident direction,
The preceding lens barrel is fixedly connected with body tube, and positive lens A is equipped in the preceding lens barrel, negative lens is equipped in the body tube
B and positive lens C.
Further, the airspace of the positive lens A and negative lens B is 2mm, between the negative lens B and positive lens C
Airspace be 21mm.
Further, the rear end of the preceding lens barrel is provided with the step surface for installing positive lens A, the positive lens A's
Side is provided with for positive lens A pressings to be fixed on the A trim rings on preceding lens barrel.
Further, the front end of the body tube is provided with the step surface for installing negative lens B, the negative lens B's
Side is provided with for negative lens B pressings to be fixed on the B trim rings on body tube.
Further, be provided with positioned at negative lens B and positive lens C between in the body tube for ensure negative lens B with
The BC spacer rings of the air spacing of positive lens C.
Further, accommodating cavity is offered on the body tube, connection is equipped with successively from inside to outside in the accommodating cavity
Cylinder III, coupling tunnel II and coupling tunnel I, the end face of the accommodating cavity are provided with to install in coupling tunnel I and coupling tunnel III
Flange, the end face of the end face of the coupling tunnel I, the end face of coupling tunnel II and coupling tunnel III are both provided with flange face, the primary mirror
Cylinder is connected by screw with coupling tunnel I, coupling tunnel II and coupling tunnel III.
Further, it is provided with to adjust the adjusting spiral shell that camera lens target surface is made to overlap with thermal imaging system target surface on the body tube
Nail.
Further, the peripheral side of the body tube is bolted with exterior cover pipeline, and the front end of the exterior cover pipeline is provided with cosmetic sheet,
The rear end of exterior cover pipeline is provided with the hickey for installing thermal imaging system.
A kind of assembly method of the f35mm machineries passive type without thermalization camera lens, includes the following steps：
（1）Negative lens B is mounted on to the front end of body tube, negative lens B is fixed on body tube by B trim rings, by BC
Spacer ring is placed in body tube, then installs positive lens C；
（2）Coupling tunnel III is accommodated in body tube, it will be in the flange face and body tube of coupling tunnel III using screw
Flange is fixedly connected with, and is reused screw and is fixedly connected with the flange face of coupling tunnel III and the flange face of coupling tunnel II, then reuses spiral shell
The flange face of coupling tunnel II and the flange face of coupling tunnel I are fixedly connected with by nail, finally reuse screw by the flange face of coupling tunnel I and
The inner flange of body tube is fixedly connected with；
（3）The step surface of lens barrel before positive lens A is embedded in, and fixed positive lens A is pressed with A trim rings, preceding lens barrel is connected
In body tube；
（4）Finally exterior cover pipeline is screwed onto on body tube, thermal imaging system is screwed onto exterior cover pipeline, completes assembling, rotation is adjusted
The relative position of camera lens target surface and thermal imaging system target surface can be changed in screw.
Compared with prior art, the present invention has the following advantages：The present invention have object lens of large relative aperture, mechanical passive type without
The advantages that thermalization and high transmittance, in optical design, reasonable distribution focal power, by the lens barrel material group of the different coefficients of expansion
It closes that positive lens A movements is pushed to realize the mechanical passive type of temperature self-adaptation of camera lens without thermalization to compensate image planes drift.
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Description of the drawings
Fig. 1 is the organigram of the embodiment of the present invention；
Fig. 2 is the optical system diagram of the embodiment of the present invention；
Fig. 3 is a variety of materials coupling tunnel and AB intervals relative changing value at different temperatures.
It is marked in Fig. 1：1-positive lens A, 2-negative lens B, 3-cosmetic sheet, 4-screw, 5-A trim rings, 6-preceding lens barrel,
7-coupling tunnel I, 8-B trim ring, 9-coupling tunnel II, 10-adjusting screw, 11-body tube, 12-BC spacer rings, 13-outer cover
Cylinder, 14-coupling tunnel III, 15-positive lens C；
It is marked in Fig. 2：A-positive lens A, B-negative lens B, C-positive lens C, D-image planes.
Specific embodiment
In order to which features described above of the invention and advantage is allowed to be clearer and more comprehensible, special embodiment below, and coordinate attached drawing, make detailed
Carefully it is described as follows.
As shown in Figure 1 and 2, a kind of f35mm machineries passive type is described including optical system and mechanical structure without thermalization camera lens
In the optical system of camera lens positive lens A, negative lens B and positive lens C, the machine of the camera lens are disposed with along light incident direction
Tool structure includes the preceding lens barrel 6 set gradually along light incident direction and body tube 11, the preceding lens barrel 6 are fixed with body tube 11
It connects, is equipped with positive lens A in the preceding lens barrel 6, negative lens B and positive lens C are equipped in the body tube 11.
In the present embodiment, the airspace of the positive lens A and negative lens B is 2mm, the negative lens B and positive lens C
Between airspace be 21mm.
In the present embodiment, the rear end of the preceding lens barrel 6 is provided with the step surface for installing positive lens A, described just saturating
The side of mirror A is provided with for positive lens A pressings to be fixed on the A trim rings 5 on preceding lens barrel 6.
In the present embodiment, the front end of the body tube 11 is provided with the step surface for installing negative lens B, described negative saturating
The side of mirror B is provided with for negative lens B pressings to be fixed on the B trim rings 8 on body tube 11.
In the present embodiment, it is provided between negative lens B and positive lens C in the body tube 11 negative saturating for ensureing
The BC spacer rings 12 of the air spacing of mirror B and positive lens C.
In the present embodiment, accommodating cavity is offered on the body tube 11, ring is set successively from inside to outside in the accommodating cavity
There are coupling tunnel III 14, coupling tunnel II 9 and coupling tunnel I 7, the end face of the accommodating cavity is provided with to install coupling tunnel I 7
With the inner flange of coupling tunnel III 14, the end of the end face of the coupling tunnel I 7, the end face of coupling tunnel II 9 and coupling tunnel III 14
Face is both provided with flange face, and the body tube 11 passes through screw 4 and coupling tunnel I 7, coupling tunnel II 9 and 14 phases of coupling tunnel III
Connection.
In the present embodiment, be provided on the body tube 11 makes what camera lens target surface was overlapped with thermal imaging system target surface for adjusting
Adjusting screw 10.
In the present embodiment, the peripheral side of the body tube 11 is bolted with exterior cover pipeline 13, and the front end of the exterior cover pipeline 13 is set
Cosmetic sheet 3 is equipped with, the rear end of exterior cover pipeline 13 is provided with the hickey for installing thermal imaging system.
A kind of assembly method of the f35mm machineries passive type without thermalization camera lens, includes the following steps：
（1）Negative lens B is mounted on to the front end of body tube 11, negative lens B is fixed on body tube 11 by B trim rings 8,
BC spacer rings 12 are placed in body tube 11, then positive lens C is installed；
（2）Coupling tunnel III 14 is accommodated in body tube 11, using screw 4 by the flange face of coupling tunnel III 14 with
The inner flange of body tube 11 is fixedly connected with, and reuses screw 4 by the flange face of coupling tunnel III 14 and the flange face of coupling tunnel II 9
It is fixedly connected with, then reuses screw 4 and be fixedly connected with the flange face of coupling tunnel II 9 and the flange face of coupling tunnel I 7, finally make again
The flange face of coupling tunnel I 7 and the inner flange of body tube 11 are fixedly connected with screw 4；
（3）The step surface of lens barrel 6 before positive lens A is embedded in, and fixed positive lens A is pressed with A trim rings 5, by preceding lens barrel 6
It is connected in body tube 11；
（4）Finally exterior cover pipeline 13 is screwed onto on body tube 11, thermal imaging system is screwed onto exterior cover pipeline 13, completes assembling, rotation
Turn the relative position that camera lens target surface and thermal imaging system target surface can be changed in adjusting screw 10.
In the present embodiment, since f35mm machineries passive type will be in -40 DEG C ~ 80 DEG C of temperature environment without thermalization camera lens
Normal work, and the dn/dt values that the refractive index of most of infra-red materials varies with temperature are larger, with the variation of temperature, system
Significant image planes drift is inevitably generated, the target surface for making infrared lens is misaligned with generating drift with thermal imaging system target position, leads
It causes the picture quality degradation of thermal imaging system or even thermal imaging system can be made not receive image.In order to eliminate temperature to image quality
Influence, the present invention is in optical design, reasonable distribution focal power, by the lens barrel combination of materials of the different coefficients of expansion to push
Positive lens A movements realize the mechanical passive type of temperature self-adaptation without thermalization feature to compensate image planes drift.Within the system, it adopts
It passively realizes that high/low temperature compensates without thermalization with machinery, is moved by first lens of drive that expand with heat and contract with cold of structural member, through setting
Meter calculates amount of movement:Low temperature（-40℃）For：- 0.09mm, high temperature（+80℃）For：+0.076mm.Positive lens A is far from detection
Device is negative, close to detector for just.
In the present embodiment, exterior cover pipeline 13 when the temperature varies, will not be generated with body tube 11 using same material
The relative displacement that different materials are generated by coefficient of expansion difference.And coupling tunnel I 7, coupling tunnel II 9 and coupling tunnel III 14 are with before
It is connected between lens barrel 6 and body tube 11 using sleeve installation and flange face screw 4, due to the gold using different coefficient of thermal expansions
Belong to material, thus generate different length and change, in Fig. 1, the conjunction plane of the conjunction plane and coupling tunnel III 14 of body tube 11 is long
Degree：L1=25.3mm, 11 material of body tube be 2A12-T4 aluminium alloys, coefficient of expansion α 1=22.7 × 10-6；Coupling tunnel III's 14
14 material of conjunction plane length L2=23.6mm, coupling tunnel III of conjunction plane and coupling tunnel II 9 are low-alloy steel, coefficient of expansion α 3
=8.31×10-6；The conjunction plane of coupling tunnel II 9 and conjunction plane 9 material of length L3=36.9mm, coupling tunnel II of coupling tunnel I 7
For 2A12-T4 aluminium alloys, coefficient of expansion α 1=22.7 × 10-6；The mounting surface length of the conjunction plane of coupling tunnel I 7 and preceding lens barrel 6：
L4=10.5mm, preceding 6 material of lens barrel be 2A12-T4 aluminium alloys, coefficient of expansion α 1=22.7 × 10-6.As shown in figure 3, all parts
Between variable quantity be respectively Δ x1, Δ x2, Δ x3, Δ x4, the thermal imaging system target surface axial position amount of varying with temperature is Δ x,
Wherein：Δ x=Δ x1+ Δ x2- Δ x3+ Δ x4, when the temperature varies, the target surface variation after no thermalized design is -40
DEG C when, AB variation deltas x=- 0.09mm.At 80 DEG C, AB variation deltas x=- 0.0772mm meets being wanted without thermalization for optical design
It asks.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification should all belong to the covering scope of the present invention.
Claims (6)
1. a kind of f35mm machineries passive type is without thermalization camera lens, it is characterised in that：Including optical system and mechanical structure, the mirror
In the optical system of head positive lens A, negative lens B and positive lens C, the machinery of the camera lens are disposed with along light incident direction
Structure includes the preceding lens barrel and body tube that are set gradually along light incident direction, and the preceding lens barrel is fixedly connected with body tube, institute
Positive lens A is equipped in lens barrel before stating, it is saturating with bearing that negative lens B and positive lens C, the positive lens A are equipped in the body tube
The airspace of mirror B is 2mm, and the airspace between the negative lens B and positive lens C is 21mm, is opened up on the body tube
There is accommodating cavity, coupling tunnel III, coupling tunnel II and coupling tunnel I, the accommodating cavity are equipped with successively from inside to outside in the accommodating cavity
End face be provided with inner flange for installing coupling tunnel I and coupling tunnel III, the end face of the coupling tunnel I, the end of coupling tunnel II
Face and the end face of coupling tunnel III are both provided with flange face, and the body tube is by screw and coupling tunnel I, coupling tunnel II and couples
Cylinder III is connected；Primary mirror cylinder material be 2A12-T4 aluminium alloys, coefficient of expansion α 1=22.7 × 10-6；Coupling tunnel III materials are low
Steel alloy, coefficient of expansion α 3=8.31 × 10-6；Coupling tunnel II materials be 2A12-T4 aluminium alloys, coefficient of expansion α 1=22.7 × 10-6；Preceding lens barrel material be 2A12-T4 aluminium alloys, coefficient of expansion α 1=22.7 × 10-6。
2. a kind of f35mm machineries passive type according to claim 1 is without thermalization camera lens, it is characterised in that：The preceding lens barrel
Rear end be provided with step surface for installing positive lens A, the side of the positive lens A is provided with to press positive lens A
A trim rings before being fixed on lens barrel.
3. a kind of f35mm machineries passive type according to claim 1 is without thermalization camera lens, it is characterised in that：The body tube
Front end be provided with step surface for installing negative lens B, the side of the negative lens B is provided with to press negative lens B
The B trim rings being fixed on body tube.
4. a kind of f35mm machineries passive type according to claim 1 is without thermalization camera lens, it is characterised in that：The body tube
It is interior be provided between negative lens B and positive lens C for ensure negative lens B and positive lens C air spacing BC spacer rings.
5. a kind of f35mm machineries passive type according to claim 1 is without thermalization camera lens, it is characterised in that：The body tube
On be provided with for adjust camera lens target surface is made to be overlapped with thermal imaging system target surface adjusting screw.
6. a kind of f35mm machineries passive type according to claim 1 is without thermalization camera lens, it is characterised in that：The body tube
Peripheral side be bolted with exterior cover pipeline, the front end of the exterior cover pipeline is provided with cosmetic sheet, and the rear end of exterior cover pipeline is provided with to install
The hickey of thermal imaging system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510916287.7A CN105353489B (en) | 2015-12-14 | 2015-12-14 | A kind of f35mm machineries passive type is without thermalization camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510916287.7A CN105353489B (en) | 2015-12-14 | 2015-12-14 | A kind of f35mm machineries passive type is without thermalization camera lens |
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| Publication Number | Publication Date |
|---|---|
| CN105353489A CN105353489A (en) | 2016-02-24 |
| CN105353489B true CN105353489B (en) | 2018-06-29 |
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| CN106094156A (en) * | 2016-08-17 | 2016-11-09 | 福建福光天瞳光学有限公司 | F19mm vehicle-mounted far infrared machinery is without transconversion into heat camera lens |
| CN106125275A (en) * | 2016-08-22 | 2016-11-16 | 福建福光天瞳光学有限公司 | Double Manual adjustable are without the infrared tight shot of transconversion into heat and method of work |
| CN106443940A (en) * | 2016-12-16 | 2017-02-22 | 福建福光天瞳光学有限公司 | High-fog-penetrating-property dual-compensation type optical machinery mixed athermalization long-wave infrared vehicle-mounted lens and compensation method thereof |
| CN106443982A (en) * | 2016-12-16 | 2017-02-22 | 福建福光天瞳光学有限公司 | Standard optical athermalization lens and making method thereof |
| CN106443942A (en) * | 2016-12-16 | 2017-02-22 | 福建福光天瞳光学有限公司 | F20 mm portable mechanical passive athermal infrared prime lens and using method thereof |
| US10859784B2 (en) | 2017-02-06 | 2020-12-08 | Lite-On Electronics (Guangzhou) Limited | Optical assembly and camera module |
| TWI662311B (en) * | 2017-02-06 | 2019-06-11 | 大陸商光寶電子（廣州）有限公司 | Optical assembly and camera module |
| CN109324380A (en) * | 2017-07-31 | 2019-02-12 | 上旸光学股份有限公司 | Carry on the back the lens construction of burnt variation compensation |
| CN109917559A (en) * | 2017-12-13 | 2019-06-21 | 长光华大基因测序设备（长春）有限公司 | High-precision optical lens eccentricity adjusts structure and method |
| CN109975967A (en) * | 2019-04-18 | 2019-07-05 | 福建福光天瞳光学有限公司 | Compact lightweight type 70mm focusing motor-driven lens structure and assembly method |
| CN113985559B (en) * | 2021-10-27 | 2023-08-22 | 河南平原光电有限公司 | Wide-spectrum long-focal-length high-resolution lens and adjustment method |
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| US3205774A (en) * | 1961-07-24 | 1965-09-14 | Eastman Kodak Co | Thermally compensated plastic triplet lens |
| JP2007178541A (en) * | 2005-12-27 | 2007-07-12 | Kyocera Corp | Imaging lens structure body, optical module, mobile terminal, and method for incorporating and manufacturing them |
| JP5146319B2 (en) * | 2006-11-09 | 2013-02-20 | コニカミノルタアドバンストレイヤー株式会社 | Lens barrel |
| US8274743B2 (en) * | 2010-04-08 | 2012-09-25 | Scaggs Michael J | Thermally compensating lens for high power lasers |
| CN202339434U (en) * | 2011-09-12 | 2012-07-18 | 云南北方驰宏光电有限公司 | Mechanical compensation type infrared temperature self-adaptive lens device |
| CN202305975U (en) * | 2011-10-08 | 2012-07-04 | 宁波舜宇红外技术有限公司 | Long wave optical thermal difference eliminating lens |
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| CN105005132B (en) * | 2015-06-25 | 2017-09-29 | 北京空间机电研究所 | A kind of infrared low-temperature lens structure |
| CN205263380U (en) * | 2015-12-14 | 2016-05-25 | 福建福光股份有限公司 | F35mm machinery passive form does not have camera lens of heating |
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