CN106405783A - f8mm economical fixed structure type non-refrigeration infrared lens and working method thereof - Google Patents
f8mm economical fixed structure type non-refrigeration infrared lens and working method thereof Download PDFInfo
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- CN106405783A CN106405783A CN201611170189.4A CN201611170189A CN106405783A CN 106405783 A CN106405783 A CN 106405783A CN 201611170189 A CN201611170189 A CN 201611170189A CN 106405783 A CN106405783 A CN 106405783A
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- ring
- lens
- f8mm
- fixed structure
- positive 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
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
-
- 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
- G02B7/021—Mountings, adjusting means, or light-tight connections, for optical elements for lenses for more than one lens
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Lens Barrels (AREA)
Abstract
The invention relates to a f8mm economical fixed structure type non-refrigeration infrared lens and working method thereof. The f8mm economical fixed structure type non-refrigeration infrared lens includes a main lens barrel and an optical system arranged in the main lens barrel, the optical system includes a negative lens A, a positive lens B and a positive lens C which are arranged in sequence along a light incidence direction, an air interval between the negative lens A and the positive lens B is 12.61mm, and an air interval between the positive lens B and the positive lens C is 10.7mm. The f8mm economical fixed structure type non-refrigeration infrared lens provided by the invention is compact in structure, convenient to use and low in manufacturing cost, and is suitable for large-scale production; and the f8mm economical fixed structure type non-refrigeration infrared lens has a high imaging resolution ratio and high penetrativity, and can capture an object with small temperature variation.
Description
Technical field：
The present invention relates to a kind of f8mm economical fixed structure formula uncooled ir camera lens and its method of work.
Background technology：
Continuous development with uncooled detector technology and increasingly mature, LWIR Uncooled Optical System is in the military and people
All it is widely used with field, because infrared lens have good in anti-interference performance；Night operating distance is remote；Penetrate cigarette
Dirt, haze ability are strong；Can round-the-clock, round-the-clock work；There is multiple target panorama observe, follow the trail of and target identification ability and good
Anti- target stealthy ability the advantages of, so higher and higher requirement is proposed to the image quality of optical system.But due to
There is certain fuel factor in infrared optical material and mechanical material, the acute variation of operating temperature can produce seriously to optical system
Impact, for example cause focal length variations, image planes drift, image quality decline etc..Therefore, in order to adapt to varying environment temperature,
Infrared lens are asked to have certain temperature self-adaptation ability；And long lasting under continuous monitoring left and right, more require red
The features such as outer camera lens has large-scale adaptation different weather climatic condition, therefore also wants camera lens in the case of long monitoring
There is the features such as high resolution, mist transmitting be strong, aberration rate is low, features simple structure, and intensity is reliable, stability is strong.However, it is big on the market
Most lens constructions is complicated, difficulty of processing and relatively costly, and mist transmitting is poor, resolution ratio is low, especially when monitoring at night
Because environment temperature is substantially close to so be difficult to differentiate between the form of monitored things.
Content of the invention：
It is an object of the invention to provide a kind of f8mm economical fixed structure formula uncooled ir camera lens and its method of work, knot
Structure is compact, easy to use, and cost of manufacture is cheap, suitable for scale production.
To achieve these goals, the technical solution used in the present invention is：A kind of non-system of the economical fixed structure formula of f8mm
Cold infrared lens, including body tube, the optical system being arranged in body tube, described optical system is included along light incident direction
Negative lens A, positive lens B and the positive lens C setting gradually, the airspace between described negative lens A and positive lens B is
12.61mm, the airspace between described positive lens B and positive lens C is 10.7mm.
Further, offer one in described body tube in order to along light incident direction successively clamping negative lens A, positive lens
B and the shoulder hole of positive lens C, the front end of described shoulder hole is provided with an annular flange flange, and described annular flange flange props up negative lens A's
Front edge, via interior sheathed the first spacer ring positioning with shoulder hole inwall between described negative lens A and positive lens B, described just
Lens B and positive lens C via interior the second spacer ring positioning being sheathed on shoulder hole inwall, press after being bolted with by the rear end of described body tube
Circle, the inner ring of described rear trim ring props up the rear edge of positive lens C.
Further, the front end outer side wall of described body tube is closely arranged with front back-up ring, described front back-up ring and body tube it
Between be provided with one and be embedded the O-ring seal in body tube lateral wall.
Further, the rear end lateral wall of described body tube is provided with a ring-shaped protuberance stretching out, described protuberance
It is horizontally set with the fixture of a Z-shaped shape and the rearward end of front back-up ring between, the outside of described fixture has been horizontally set with the first expansion ring, institute
State the left and right two ends of the first expansion ring respectively with the rearward end of front back-up ring and the right part phase contact of fixture；Described fixture
Inner side has been horizontally set with the second expansion ring, left and right two ends left part and the protuberance phase top with fixture respectively of described second expansion ring
Support.
Further, between the rearward end of the left part of described fixture and front back-up ring, the right part of fixture and protuberance
Between be respectively arranged with the gap stretched with sharp first expansion ring and the second expansion ring.
Further, the outside of described front back-up ring is provided with one and covers at outside front back-up ring, fixture, protuberance and rear trim ring
Outer cover, the inner ring at front end of described outer cover is threadeded with front back-up ring, sets between the madial wall of described outer cover and the right flank of protuberance
There is a shell fragment.
A kind of method of work of f8mm of the present invention economical fixed structure formula uncooled ir camera lens, using above-mentioned f8mm
Economical fixed structure formula uncooled ir camera lens, during work, expansion ring is stretched in the presence of fixture expands with heat and contract with cold,
Promote body tube to move forward and backward while expansion ring stretches, compensate the change in displacement of body tube by shell fragment.
Compared with prior art, the present invention has the effect that：（1）There is high imaging resolution, high-penetrability, can
Catch the object of tiny temperature change；（2）Compact conformation, easy to use, cost of manufacture is cheap, suitable for scale production；（3）?
On the premise of ensureing compact conformation, it is spirally connected with front back-up ring by outer cover, the raising such as fixture between outer cover and body tube, shell fragment
Camera lens vibration resistance, the ability of impact；（4）Body tube adopts integrated design, has good sealing property；In lens construction
Rigidity Calculation can be carried out in design, suitably increase wall thickness, improve intrinsic frequency, the vibration resistance improving camera lens is it is ensured that system
Use requirement；Ensure the sealing property of camera lens.
Brief description：
Fig. 1 is the optical system structure schematic diagram of the embodiment of the present invention；
Fig. 2 is the camera lens overall structure diagram of the embodiment of the present invention.
In figure：
1- body tube；Back-up ring before 2-；3- outer cover；4- shell fragment；Trim ring after 5-；6- sealing ring；7- first spacer ring；8- second stretches
Ring；9- fixture；10- first expansion ring；11- second spacer ring；A- negative lens A；B- positive lens B；C- positive lens C.
Specific embodiment:
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1-2, a kind of f8mm of the present invention economical fixed structure formula uncooled ir camera lens, including body tube 1,
It is arranged on the optical system in body tube 1, negative lens A that described optical system includes setting gradually along light incident direction, just
Lens B and positive lens C, the airspace between described negative lens A and positive lens B is 12.61mm, described positive lens B and just saturating
Airspace between mirror C is 10.7mm.
In the present embodiment, following technical indicator is reached by the optical system that above-mentioned lens set is constituted：
（1）Service band：8μm-12μm；
（2）Focal length：f′=8mm；
（3）Detector：384 × 288,25 μm of LWIR Uncooled type；
（4）Angle of visual field FOV：77°；
（5）Relative aperture D/ f '：1/1.0；
（6）Optics volume：∅48mm×33.96mm（Diameter × length）；
（7）Each lens parameters, as shown in Table 1：
In Table 1, radius of curvature refers to the radius of curvature on each surface of eyeglass, and spacing refers to the distance between two adjacently situated surfaces, lifts
Example explanation：S1, S2 are negative lens A away from the surface with neighbouring positive lens B respectively, and the spacing of S1 refers between S1 and S2 surface
Center distance, other the rest may be inferred.
Aspheric mask body face type equation is as follows：
Z be aspherical along optical axis direction height be r position when, away from aspheric vertex of surface apart from rise；C=1/R, R represent mirror
The paraxial radius of curvature in face；K is circular cone coefficient；A, B, C, D are high order aspheric surface coefficient.
Wherein S5：C=1/R, R=33.014, k=0, A=-1.725E-005, B=6.431E-0.09, C=-2.0146E-010,
D=3.3012E-013.
In the present embodiment, offer one in described body tube 1 in order to along light incident direction successively clamping negative lens A, just
Lens B and the shoulder hole of positive lens C, the front end of described shoulder hole is provided with an annular flange flange, and described annular flange flange props up negative saturating
The front edge of mirror A, positions via interior sheathed the first spacer ring 7 with shoulder hole inwall between described negative lens A and positive lens B,
Airspace between negative lens A and positive lens B is sheathed on ladder for 12.61mm, described positive lens B and positive lens C via interior
Second spacer ring 11 of in the hole wall positions it is ensured that the airspace between positive lens B and positive lens C is 10.7mm, described body tube 1
Rear end be bolted with rear trim ring 5, the inner ring of described rear trim ring 5 props up the rear edge of positive lens C, so that after to positive lens C
End is fixed.
In the present embodiment, the front end outer side wall of described body tube 1 is closely arranged with front back-up ring 2, described front back-up ring 2 and primary mirror
Be provided with one between cylinder 1 and be embedded O-ring seal 6 in body tube 1 lateral wall, improve body tube 1 in moving process with front back-up ring
Sealing between 2.
In the present embodiment, the rear end lateral wall of described body tube 1 is provided with a ring-shaped protuberance stretching out, described convex
It is horizontally set with the fixture 9 of a Z-shaped shape, the outside of described fixture 9 has been horizontally set with first and has stretched between the rearward end of portion and front back-up ring 2
Ring 10, the left and right two ends of described first expansion ring 10 respectively with the rearward end of front back-up ring 2 and the right part phase contact of fixture 9；
The inner side of described fixture 9 has been horizontally set with the second expansion ring 8, the left and right two ends left side with fixture 9 respectively of described second expansion ring 8
End and protuberance phase contact, drive the first expansion ring 10 and the second expansion ring 8 in the opposite direction by expanding with heat and contract with cold of fixture 9
Flexible, thus promoting body tube 1 to move forward and backward.
In the present embodiment, between the left part of described fixture 9 and the rearward end of front back-up ring 2, the right part of fixture 9 with
It is respectively arranged between protuberance with sharp first expansion ring 10 and the flexible gap of the second expansion ring 8.
In the present embodiment, the outside of described front back-up ring 2 is provided with one and covers at front back-up ring 2, fixture 9, protuberance and rear pressure
Outer cover 3 outside circle 5, the inner ring at front end of described outer cover 3 threadeds with front back-up ring 2, the madial wall of described outer cover 3 and the right side of protuberance
It is provided with a shell fragment 4, the change in displacement being provided for compensation body tube 1 generation of shell fragment 4 between side.
In the present embodiment, the rear end of described outer cover 3 is provided with the external screw thread being connected with video camera.
In the present embodiment, during the use of camera lens, the first expansion ring 10 and the second expansion ring 8 cooperation fixture 9 lead to
Cross the principle expanded with heat and contract with cold to be stretched, promote body tube 1 outer cover 3 displacement relatively to become by the change of flexible ring length
Change, compensate the change in displacement of body tube generation simultaneously by the shell fragment 4 on protuberance with outer cover madial wall.
In the present embodiment, mechanical passive type no thermalization in structure design utilizes the difference between mechanical material thermal characteristics,
The impact of temperature is eliminated by the combination of different qualities material, keeps stablizing as matter interior in a big way, realize temperature adaptive
The machinery answered no thermalization, enables infrared optical system to keep good image quality within the scope of a larger temperature；Separately
Outer fixation is structure design rear cut-off distance and debugging finishes, and secondary need not adjust, greatly improves economic and practical.
A kind of method of work of f8mm of the present invention economical fixed structure formula uncooled ir camera lens, using above-mentioned f8mm
Economical fixed structure formula uncooled ir camera lens, during work, the first expansion ring 10 and the second expansion ring 8 are in fixture 9 heat expansion
Stretched in the presence of shrinkage, promote body tube 1 to move forward and backward while expansion ring stretches, body tube 1 is compensated by shell fragment 4
Change in displacement.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modify, all should belong to the covering scope of the present invention.
Claims (7)
1. a kind of f8mm economical fixed structure formula uncooled ir camera lens it is characterised in that：Including body tube, it is arranged on primary mirror
Optical system in cylinder, described optical system includes negative lens A, the positive lens B setting gradually along light incident direction and just saturating
Mirror C, the airspace between described negative lens A and positive lens B is 12.61mm, the sky between described positive lens B and positive lens C
Gas is spaced apart 10.7mm.
2. f8mm according to claim 1 economical fixed structure formula uncooled ir camera lens it is characterised in that：Described master
One is offered in order to the shoulder hole along light incident direction successively clamping negative lens A, positive lens B and positive lens C, institute in lens barrel
The front end stating shoulder hole is provided with an annular flange flange, and described annular flange flange props up the front edge of negative lens A, described negative lens A with
Via interior sheathed the first spacer ring positioning with shoulder hole inwall between positive lens B, described positive lens B and positive lens C is via inner sleeve
Located at the second spacer ring positioning of shoulder hole inwall, the rear end of described body tube is bolted with rear trim ring, and the inner ring of described rear trim ring supports
Live the rear edge of positive lens C.
3. f8mm according to claim 1 economical fixed structure formula uncooled ir camera lens it is characterised in that：Described master
The front end outer side wall of lens barrel is closely arranged with front back-up ring, is provided with one and is embedded outside body tube between described front back-up ring and body tube
The O-ring seal of wall.
4. f8mm according to claim 3 economical fixed structure formula uncooled ir camera lens it is characterised in that：Described master
The rear end lateral wall of lens barrel is provided with a ring-shaped protuberance stretching out, and is horizontally set between the rearward end of described protuberance and front back-up ring
There is the fixture of a Z-shaped shape, the outside of described fixture has been horizontally set with the first expansion ring, and the left and right two ends of described first expansion ring are divided
Not with the rearward end of front back-up ring and the right part phase contact of fixture；The inner side of described fixture has been horizontally set with the second expansion ring, institute
State left and right two ends left part and the protuberance phase contact with fixture respectively of the second expansion ring.
5. f8mm according to claim 4 economical fixed structure formula uncooled ir camera lens it is characterised in that：Described solid
Determine between the left part of part and the rearward end of front back-up ring, be respectively arranged between the right part of fixture and protuberance and stretched with profit first
The gap that contracting ring and the second expansion ring stretch.
6. f8mm according to claim 5 economical fixed structure formula uncooled ir camera lens it is characterised in that：Before described
The outside of back-up ring is provided with an outer cover covering at outside front back-up ring, fixture, protuberance and rear trim ring, the inner ring at front end of described outer cover
Threaded with front back-up ring, between the madial wall of described outer cover and the right flank of protuberance, be provided with a shell fragment.
7. a kind of f8mm economical fixed structure formula uncooled ir camera lens method of work it is characterised in that：Using such as right
Require the arbitrary described f8mm of 1-6 economical fixed structure formula uncooled ir camera lens, during work, expansion ring is in fixture heat expansion
Stretched in the presence of shrinkage, promote body tube to move forward and backward while expansion ring stretches, body tube is compensated by shell fragment
Change in displacement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170189.4A CN106405783B (en) | 2016-12-16 | 2016-12-16 | A kind of economical fixed structure formula uncooled ir camera lens of f8mm and its working method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170189.4A CN106405783B (en) | 2016-12-16 | 2016-12-16 | A kind of economical fixed structure formula uncooled ir camera lens of f8mm and its working method |
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| CN106405783A true CN106405783A (en) | 2017-02-15 |
| CN106405783B CN106405783B (en) | 2019-01-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065149A (en) * | 2017-04-19 | 2017-08-18 | 福建福光天瞳光学有限公司 | Far infrared high transmittance camera lens and its method of work |
| 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 |
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| CN106125263A (en) * | 2016-08-22 | 2016-11-16 | 福建福光天瞳光学有限公司 | A kind of fixed type machinery of dolly-out,ing dolly-back is passive without transconversion into heat infrared lens and installation method thereof |
| CN106125249A (en) * | 2016-08-22 | 2016-11-16 | 福建福光天瞳光学有限公司 | High-resolution non-refrigeration type infrared long wave short-focus lens and installation method thereof |
| CN206311819U (en) * | 2016-12-16 | 2017-07-07 | 福建福光天瞳光学有限公司 | A kind of economical fixed structure formula uncooled ir camera lenses of f8mm |
-
2016
- 2016-12-16 CN CN201611170189.4A patent/CN106405783B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125263A (en) * | 2016-08-22 | 2016-11-16 | 福建福光天瞳光学有限公司 | A kind of fixed type machinery of dolly-out,ing dolly-back is passive without transconversion into heat infrared lens and installation method thereof |
| CN106125249A (en) * | 2016-08-22 | 2016-11-16 | 福建福光天瞳光学有限公司 | High-resolution non-refrigeration type infrared long wave short-focus lens and installation method thereof |
| CN206311819U (en) * | 2016-12-16 | 2017-07-07 | 福建福光天瞳光学有限公司 | A kind of economical fixed structure formula uncooled ir camera lenses of f8mm |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107065149A (en) * | 2017-04-19 | 2017-08-18 | 福建福光天瞳光学有限公司 | Far infrared high transmittance camera lens and its method of work |
| 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 |
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