CN106405783B - A kind of economical fixed structure formula uncooled ir camera lens of f8mm and its working method - Google Patents
A kind of economical fixed structure formula uncooled ir camera lens of f8mm and its working method Download PDFInfo
- Publication number
- CN106405783B CN106405783B CN201611170189.4A CN201611170189A CN106405783B CN 106405783 B CN106405783 B CN 106405783B CN 201611170189 A CN201611170189 A CN 201611170189A CN 106405783 B CN106405783 B CN 106405783B
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- lens
- positive lens
- ring
- uncooled
- f8mm
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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 present invention relates to a kind of economical fixed structure formula uncooled ir camera lens of f8mm and its working methods, including body tube, the optical system being arranged in body tube, the optical system includes the negative lens A, positive lens B and positive lens C set gradually along light incident direction, airspace between the negative lens A and positive lens B is 12.61mm, and the airspace between the positive lens B and positive lens C is 10.7mm.Structure of the invention is compact, easy to use, and cost of manufacture is cheap, suitable for scale production；With high imaging resolution, high-penetration, the object of tiny temperature change can be captured.
Description
Technical field:
The present invention relates to a kind of economical fixed structure formula uncooled ir camera lens of f8mm and its working methods.
Background technique:
With the continuous development of uncooled detector technology and increasingly mature, LWIR Uncooled Optical System is military
It is widely used with civil field, because infrared lens have good in anti-interference performance；Night operating distance is remote；It penetrates
Flue dust, haze ability are strong；It can round-the-clock, round-the-clock work；With the observation of multiple target panorama, tracking and target identification ability and good
The advantages that ability of good anti-target stealth, so the image quality to optical system proposes increasingly higher demands.But by
In infrared optical material and mechanical material there are certain fuel factor, the acute variation of operating temperature can generate optical system tight
The influence of weight, such as cause focal length variations, image planes drift, image quality decline etc..Therefore, in order to adapt to varying environment temperature,
It is required that infrared lens have certain temperature self-adaptation ability；And under long lasting for continuous monitoring left and right, more require
Infrared lens have the characteristics that adapt to different weather climatic condition on a large scale, therefore also want mirror in prolonged monitoring
Head has the features such as high resolution, mist transmitting is strong, aberration rate is low, features simple structure, intensity is reliable, stability is strong.However, on the market
Most of lens construction is complicated, and difficulty of processing and higher cost, mist transmitting is poor, resolution ratio is low, especially when night monitors
It waits since environment temperature is substantially close to so be difficult to differentiate between the form of monitored things.
Summary of the invention:
The purpose of the present invention is to provide a kind of economical fixed structure formula uncooled ir camera lens of f8mm and its work sides
Method, compact-sized, easy to use, cost of manufacture is cheap, suitable for scale production.
To achieve the goals above, the technical solution adopted by the present invention is that: a kind of economical non-system of fixed structure formula of f8mm
Cold infrared lens, including body tube, the optical system being arranged in body tube, the optical system includes along light incident direction
Negative lens A, the positive lens B and positive lens C, the airspace between the negative lens A and positive lens B set gradually be
12.61mm, the airspace between the positive lens B and positive lens C are 10.7mm.
Further, one is offered in the body tube to be successively clamped negative lens A, positive lens along light incident direction
The front end of the stepped hole of B and positive lens C, the stepped hole is equipped with an annular flange, and the annular flange resists negative lens A's
Front edge, between the negative lens A and positive lens B via it is interior be arranged with the first spacer ring of stepped hole inner wall position, it is described just
Lens B and positive lens C is positioned via interior the second spacer ring for being sheathed on stepped hole inner wall, and the rear end of the body tube is pressed after being bolted with
The inner ring of circle, the rear pressing ring resists the rear edge of positive lens C.
Further, the front end outer side wall of the body tube is closely arranged with preceding retaining ring, the preceding retaining ring and body tube it
Between be equipped with one and be embedded ring type seal in body tube lateral wall.
Further, the rear end lateral wall of the body tube is equipped with an outwardly extending ring-shaped protrusion, the protrusion
It is horizontally set with the fixing piece of a Z-shaped shape between the rear end of preceding retaining ring, the first expansion ring, institute have been horizontally set on the outside of the fixing piece
State the left and right ends of the first expansion ring right part phase contact with the rear end of preceding retaining ring and fixing piece respectively；The fixing piece
Inside has been horizontally set with the second expansion ring, the left and right ends of second expansion ring respectively with the left part of fixing piece and protrusion Xiang Ding
It supports.
Further, between the left part of the fixing piece and the rear end of preceding retaining ring, the right part and protrusion of fixing piece
Between be respectively arranged with the gap flexible with sharp first expansion ring and the second expansion ring.
Further, the outside of the preceding retaining ring is equipped with one and covers at outside preceding retaining ring, fixing piece, protrusion and rear pressing ring
Outer cover, the inner ring at front end of the outer cover are threadedly coupled with preceding retaining ring, are set between the inner sidewall of the outer cover and the right side of protrusion
There is an elastic slice.
A kind of working method of the economical fixed structure formula uncooled ir camera lens of f8mm of the present invention, using above-mentioned f8mm
Economical fixed structure formula uncooled ir camera lens, when work, expansion ring stretches under the action of fixing piece expands with heat and contract with cold,
It pushes body tube to be moved forward and backward while expansion ring is flexible, the change in displacement of body tube is compensated by elastic slice.
Compared with prior art, the present invention has the effect that (1) has high imaging resolution, high-penetration, can
Capture the object of tiny temperature change；(2) compact-sized, easy to use, cost of manufacture is cheap, suitable for scale production；(3) exist
Guarantee it is compact-sized under the premise of, be spirally connected by outer cover and preceding retaining ring, fixing piece, elastic slice between outer cover and body tube etc. improve
Camera lens vibration resistance, the ability of impact；(4) body tube uses integrated design, has good sealing performance；In lens construction
Rigidity Calculation can be carried out in design, suitably increase wall thickness, improve intrinsic frequency, improve the vibration resistance of camera lens, guarantee system
Requirement；Guarantee the sealing performance of camera lens.
Detailed description of the invention:
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；Retaining ring before 2-；3- outer cover；4- elastic slice；Pressing ring after 5-；6- sealing ring；The first spacer ring of 7-；8- second stretches
Contracting ring；9- fixing piece；The first expansion ring of 10-；The second spacer ring of 11-；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 Figs. 1-2, a kind of economical fixed structure formula uncooled ir camera lens of f8mm of the present invention, including body tube 1,
Optical system in body tube 1 is set, and the optical system includes the negative lens A set gradually along light incident direction, just
Lens B and positive lens C, airspace between the negative lens A and positive lens B are 12.61mm, the positive lens B and just saturating
Airspace between mirror C is 10.7mm.
In the present embodiment, following technical indicator 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 '=8mm；
(3) detector: 384 × 288,25 μm of LWIR Uncooled type；
(4) FOV:77 ° of field angle；
(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, spacing refer between two adjacent surfaces away from
From, for example: S1, S2 are negative lens A respectively far from the surface with neighbouring positive lens B, and the spacing of S1 refers to S1 and the surface S2
Between center spacing, it is other that the rest may be inferred.
Aspheric mask body face type equation is as follows:
Z be it is aspherical along optical axis direction when being highly the position of r, away from aspheric vertex of surface apart from rise；C=1/R, R table
Show the paraxial curvature radius of mirror surface；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, one is offered in the body tube 1 to be successively clamped negative lens A, just along light incident direction
The stepped hole of lens B and positive lens C, the front end of the stepped hole are equipped with an annular flange, and the annular flange resists negative saturating
The front edge of mirror A is positioned via interior be arranged with the first spacer ring 7 of stepped hole inner wall between the negative lens A and positive lens B,
Airspace between negative lens A and positive lens B is sheathed on ladder via interior for 12.61mm, the positive lens B and positive lens C
Second spacer ring 11 of hole inner wall positions, and guarantees that the airspace between positive lens B and positive lens C is 10.7mm, the body tube 1
Rear end be bolted with rear pressing ring 5, it is described after the inner ring of pressing ring 5 resist the rear edge of positive lens C, after to positive lens C
End is fixed.
In the present embodiment, the front end outer side wall of the body tube 1 is closely arranged with preceding retaining ring 2, the preceding retaining ring 2 and primary mirror
Be equipped with one between cylinder 1 and be embedded ring type seal 6 in 1 lateral wall of body tube, improve body tube 1 in moving process with preceding retaining ring
Leakproofness between 2.
In the present embodiment, the rear end lateral wall of the body tube 1 is equipped with an outwardly extending ring-shaped protrusion, described convex
The fixing piece 9 of a Z-shaped shape is horizontally set between portion and the rear end of preceding retaining ring 2, it is flexible that the outside of the fixing piece 9 has been horizontally set with first
Ring 10, the left and right ends of the first expansion ring 10 right part phase contact with the rear end of preceding retaining ring 2 and fixing piece 9 respectively；
The inside of the fixing piece 9 has been horizontally set with the second expansion ring 8, the left and right ends of second expansion ring 8 left side with fixing piece 9 respectively
End and protrusion 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 for fixing piece 9
It is flexible, so that body tube 1 be pushed to be moved forward and backward.
In the present embodiment, between the left part of the fixing piece 9 and the rear end of preceding retaining ring 2, the right part of fixing piece 9 with
The gap flexible with sharp first expansion ring 10 and the second expansion ring 8 is respectively arranged between protrusion.
In the present embodiment, the outside of the preceding retaining ring 2 is equipped with one and covers at preceding retaining ring 2, fixing piece 9, protrusion and rear pressure
Outer cover 3 outside circle 5, the inner ring at front end of the outer cover 3 are threadedly coupled with preceding retaining ring 2, the inner sidewall of the outer cover 3 and the right side of protrusion
An elastic slice 4 is equipped between side, the setting of elastic slice 4 is for compensating the change in displacement of the generation of body tube 1.
In the present embodiment, the rear end of the outer cover 3 is equipped with the external screw thread being cooperatively connected with video camera.
In the present embodiment, in the use process of camera lens, the first expansion ring 10 and the second expansion ring 8 cooperation fixing piece 9 are logical
It crosses the principle expanded with heat and contract with cold to stretch, pushes body tube 1 to become with respect to the displacement of outer cover 3 by the variation for the ring length that stretches
Change, while compensating the change in displacement that body tube generates by being set to protrusion with the elastic slice 4 on outer cover inner sidewall.
In the present embodiment, mechanical passive type utilizes the difference between mechanical material thermal characteristics without thermalization in structure design,
The influence of temperature is eliminated by the combination of different characteristics material, keeps image quality to stablize in a big way, realizes that temperature is adaptive
The machinery answered enables infrared optical system to keep good image quality within the scope of a larger temperature without thermalization；Separately
Outer fixation is that structure design rear cut-off distance and debugging finish, and is not necessarily to secondary adjustment, greatly improves economic and practical.
A kind of working method of the economical fixed structure formula uncooled ir camera lens of f8mm of the present invention, using above-mentioned f8mm
Economical fixed structure formula uncooled ir camera lens, when work, the first expansion ring 10 and the second expansion ring 8 are in 9 heat expansion of fixing piece
It stretches under the action of shrinkage, pushes body tube 1 to be moved forward and backward while expansion ring is flexible, body tube 1 is compensated by elastic slice 4
Change in displacement.
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, is all covered by the present invention.
Claims (7)
1. a kind of economical fixed structure formula uncooled ir camera lens of f8mm, it is characterised in that: including body tube, be arranged in primary mirror
Cylinder in optical system, the optical system include the negative lens A set gradually along light incident direction, positive lens B and just thoroughly
Mirror C, the airspace between the negative lens A and positive lens B are 12.61mm, the sky between the positive lens B and positive lens C
10.7mm is divided between gas；The material of the negative lens A, positive lens B and positive lens C are germanium, and refractive index is 4.004, are born
The radius of curvature on surface of the lens A far from positive lens B is 12.65mm, and the radius of curvature close to the surface of positive lens B is
8.42mm；The radius of curvature on surface of the positive lens B far from positive lens C is 194.44mm, the curvature half close to the surface of positive lens C
Diameter is 60.17mm；Positive lens C close to the surface of positive lens B be it is aspherical, the radius of curvature on surface far from positive lens B is
113.25mm。
2. the economical fixed structure formula uncooled ir camera lens of f8mm according to claim 1, it is characterised in that: the master
A stepped hole to be successively clamped negative lens A, positive lens B and positive lens C along light incident direction, institute are offered in lens barrel
The front end for stating stepped hole is equipped with an annular flange, and the annular flange resists the front edge of negative lens A, the negative lens A with
It is positioned via interior be arranged with the first spacer ring of stepped hole inner wall between positive lens B, the positive lens B and positive lens C are via inner sleeve
The second spacer ring set on stepped hole inner wall positions, and the rear end of the body tube is bolted with rear pressing ring, and the inner ring of the rear pressing ring supports
The firmly rear edge of positive lens C.
3. the economical fixed structure formula uncooled ir camera lens of f8mm according to claim 1, it is characterised in that: the master
The front end outer side wall of lens barrel is closely arranged with preceding retaining ring, and one is equipped between the preceding retaining ring and body tube and is embedded on the outside of body tube
The ring type seal of wall.
4. the economical fixed structure formula uncooled ir camera lens of f8mm according to claim 3, it is characterised in that: the master
The rear end lateral wall of lens barrel is equipped with an outwardly extending ring-shaped protrusion, is horizontally set between the protrusion and the rear end of preceding retaining ring
There is the fixing piece of a Z-shaped shape, the first expansion ring, the left and right ends point of first expansion ring have been horizontally set on the outside of the fixing piece
Not with the right part phase contact of the rear end of preceding retaining ring and fixing piece；The second expansion ring, institute have been horizontally set on the inside of the fixing piece
State the left and right ends of the second expansion ring respectively with the left part of fixing piece and protrusion phase contact.
5. the economical fixed structure formula uncooled ir camera lens of f8mm according to claim 4, it is characterised in that: described solid
Determine to be respectively arranged between the left part of part and the rear end of preceding retaining ring, between the right part and protrusion of fixing piece and be stretched with benefit first
The gap that contracting ring and the second expansion ring stretch.
6. the economical fixed structure formula uncooled ir camera lens of f8mm according to claim 5, it is characterised in that: before described
The outside of retaining ring is equipped with an outer cover covered at outside preceding retaining ring, fixing piece, protrusion and rear pressing ring, the inner ring at front end of the outer cover
It is threadedly coupled with preceding retaining ring, an elastic slice is equipped between the inner sidewall of the outer cover and the right side of protrusion.
7. a kind of working method of the economical fixed structure formula uncooled ir camera lens of f8mm, it is characterised in that: using such as right
It is required that any economical fixed structure formula uncooled ir camera lens of f8mm of 1-6, when work, expansion ring is in fixing piece heat expansion
It stretches under the action of shrinkage, pushes body tube to be moved forward and backward while expansion ring is flexible, body tube is compensated by elastic slice
Change in displacement.
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| Application Number | Priority Date | Filing Date | Title |
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| 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 |
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| 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 CN106405783A (en) | 2017-02-15 |
| CN106405783B true CN106405783B (en) | 2019-01-01 |
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| 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 |
| 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 |
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 |
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| 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 |
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