CN106443983B - The low distortion LONG WAVE INFRARED passive type of high sharpness is without thermalization camera lens and its adjusting method - Google Patents
The low distortion LONG WAVE INFRARED passive type of high sharpness is without thermalization camera lens and its adjusting method Download PDFInfo
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- CN106443983B CN106443983B CN201611170393.6A CN201611170393A CN106443983B CN 106443983 B CN106443983 B CN 106443983B CN 201611170393 A CN201611170393 A CN 201611170393A CN 106443983 B CN106443983 B CN 106443983B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims abstract description 18
- 230000008602 contraction Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 2
- 230000002411 adverse Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000009738 saturating Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
- G02B13/146—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation with corrections for use in multiple wavelength bands, such as infrared and visible light, e.g. FLIR systems
-
- 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
-
- 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
-
- 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
-
- 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
- G02B7/023—Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
-
- 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
- G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lenses (AREA)
- Lens Barrels (AREA)
- Studio Devices (AREA)
Abstract
The present invention relates to a kind of low distortion LONG WAVE INFRARED passive types of high sharpness without thermalization camera lens and its adjusting method, and along light, incident direction is successively arranged plano-convex lens, biconcave lens and positive crescent lens from front to back in the optical system of the camera lens；The mechanical structure of the camera lens includes outer cylinder, preceding lens barrel and rear lens barrel are arranged in outer cylinder, before plano-convex lens are installed in lens barrel, biconcave lens and positive crescent lens are installed in rear lens barrel, elastomeric pad is folded between preceding lens barrel and rear lens barrel, it is screwed with the limit pressing ring positioned at preceding lens barrel periphery inside outer cylinder front end, limits pressing ring and preceding lens barrel is folded with the expansion ring that can be expanded with heat and contract with cold in the axial direction to move axially by lens barrel before expansion ring extension and contraction control.Camera lens of the present invention has the characteristics that compact-sized, high-resolution, low distortion and high sharpness；By the movement for realizing preceding lens barrel of expanding with heat and contract with cold to compensate image planes drift, good image quality is kept within the scope of temperature that can be larger, adapts to adverse circumstances, stability is good.
Description
Technical field
The present invention relates to a kind of low distortion LONG WAVE INFRARED passive types of high sharpness without thermalization camera lens and its adjusting method.
Background technique
Infrared lens have anti-interference ability is strong, penetrate flue dust and haze ability it is strong, can round-the-clock round-the-clock work and
The advantages that ability of good anti-target stealth.With the fast development of infrared imagery technique, infrared lens are in safety monitoring etc.
Field, which has, to be widely applied.But infrared lens use environment is complicated, often to undergo biggish temperature change.And infrared mirror
Infrared optical material used in head has biggish thermal refractive index coefficient compared to the optical material of visible light wave range, different
Under environment temperature, optical material and mechanical material expand with heat and contract with cold so that eyeglass radius of curvature and thickness, part airspace hair
Raw to change, the refractive index of optical material can also change with temperature, and then deviate the optimum image plane of optical system,
The image quality for reducing optical system has seriously affected the imaging performance of camera lens.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of low distortion, the low distortion LONG WAVE INFRARED quilt of high sharpness of high sharpness
Dynamic formula without thermalization camera lens and its adjusting method, can adaptive equalization because of image plane offset caused by temperature change, can be larger
Within the temperature range of keep good image quality.
The present invention is realized using following scheme: a kind of low distortion LONG WAVE INFRARED passive type of high sharpness is described without thermalization camera lens
Along light, to be successively arranged plano-convex lens, biconcave lens and positive crescent saturating for incident direction from front to back in the optical system of camera lens
Mirror；The mechanical structure of the camera lens includes outer cylinder, and preceding lens barrel and rear lens barrel are arranged in outer cylinder, and plano-convex lens are installed on preceding lens barrel
In, biconcave lens and positive crescent lens are installed in rear lens barrel, and elastomeric pad, outer cylinder are folded between preceding lens barrel and rear lens barrel
Be screwed with the limit pressing ring positioned at preceding lens barrel periphery inside front end, limit pressing ring and preceding lens barrel be folded in the axial direction can heat expansion it is cold
The expansion ring of contracting by lens barrel before expansion ring extension and contraction control to be moved axially.
Further, the expansion ring uses POM material, is connected through a screw thread between lens barrel and outer cylinder after described,
There is the hole platform for heading on rear lens barrel rear end, rear lens barrel rear end, which is also screwed with, heads on positive crescent lens rear edge in outer cylinder
Pressing ring afterwards, the spacer ring being provided in rear lens barrel between biconcave lens and positive crescent lens；It is screwed with and heads in preceding lens barrel
The preceding pressing ring of plano-convex lens front edge.
Further, the expansion ring front end heads on limit pressing ring, before expansion ring rear end heads on the flange of lens barrel rear end；
Limit pressing ring and preceding lens barrel are folded with sealing ring radially.
Further, the airspace between the plano-convex lens and biconcave lens is 1.5mm, biconcave lens and positive crescent moon
Airspace between shape lens is 11mm.
Further, the preceding curvature mirror radius of the plano-convex lens is 38mm, the preceding mirror surface of biconcave lens and rear mirror surface
Radius of curvature is respectively 80mm and 45mm, the radius of curvature of the positive preceding mirror surface of crescent lens and rear mirror surface be respectively 86.2mm and
1336mm。
It is provided by the invention another solution is that a kind of low distortion LONG WAVE INFRARED passive type of high sharpness is without thermalization camera lens
Adjusting method is made using the low distortion LONG WAVE INFRARED passive type of high sharpness as described above without thermalization camera lens when temperature changes
When image planes deviate, expansion ring realizes that axial displacement occurs for lens barrel before expansion fit elastomeric pad makes because expanding with heat and contract with cold, to mend
Repay image plane offset caused by temperature change.
Compared with prior art, the invention has the following advantages: the low distortion LONG WAVE INFRARED of high sharpness of the present invention is passive
Formula has the characteristics that compact-sized, high-resolution, low distortion and high sharpness without thermalization camera lens；Preceding lens barrel is realized by expanding with heat and contract with cold
Movement to compensate image planes drift, good image quality is kept in temperature that can be larger, adapts to adverse circumstances, stabilization
Property is good；It can be adapted to 640 × 512,17 μm of detectors of LWIR Uncooled type, execute document recording and safety monitoring is appointed
Business；Camera lens vibration resistance, the ability of impact are improved, there is good sealing performance.
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, specific embodiment and phase will be passed through below
Attached drawing is closed, invention is further described in detail.
Detailed description of the invention
Fig. 1 is the schematic diagram of optical system of inventive embodiments；
Fig. 2 is the mechanical mechanism schematic diagram of inventive embodiments；
Figure label explanation: lens barrel, 6- before the positive crescent lens of 1- plano-convex lens, 2- biconcave lens, 3-, 4- outer cylinder, 5-
Lens barrel, 7- elastomeric pad, 8- limit pressing ring, 9- expansion ring, 10- hole platform, pressing ring, 14- before pressing ring, 12- spacer ring, 13- after 11- afterwards
Flange, 15- sealing ring.
Specific embodiment
As shown in Figure 1 and 2, a kind of low distortion LONG WAVE INFRARED passive type of high sharpness is without thermalization camera lens, the optical system of the camera lens
Along light, incident direction is successively arranged plano-convex lens 1, biconcave lens 2 and positive crescent lens 3 from front to back in system；The camera lens
Mechanical structure include outer cylinder 4, be arranged with preceding lens barrel 5 and rear lens barrel 6 in outer cylinder 4, it is double before plano-convex lens 1 are installed in lens barrel 5
Concavees lens 2 and positive crescent lens 3 are installed in rear lens barrel 6, are folded with elastomeric pad 7 between preceding lens barrel 5 and rear lens barrel 6, outside
It is screwed with the limit pressing ring 8 positioned at preceding 5 periphery of lens barrel inside 4 front ends of cylinder, limits pressing ring 8 and preceding lens barrel 5 is folded in the axial direction
The expansion ring 9 that can be expanded with heat and contract with cold realizes that plano-convex lens 1 are mobile to compensate to move axially by lens barrel before expansion ring extension and contraction control
Image planes drift, realizes the mechanical passive type of temperature self-adaptation without thermalization feature.
In the present embodiment, using POM material is used, the material POM temperature sensor of thermal characteristics sensitivity becomes the expansion ring 9
Change the influence stretched with compensation temperature to the index of refraction in lens, guarantees image quality；Lead between lens barrel 6 and outer cylinder 4 after described
Threaded connection is crossed, there is the hole platform 10 for heading on rear 6 rear end of lens barrel in outer cylinder 4, rear 6 rear end of lens barrel, which is also screwed with, heads on positive crescent moon
The rear pressing ring 11 of 3 rear edge of shape lens, the spacer ring being provided in rear lens barrel 6 between biconcave lens and positive crescent lens
12；The preceding pressing ring 13 for heading on 1 front edge of plano-convex lens is screwed in preceding lens barrel 5.
In the present embodiment, 9 front end of expansion ring heads on limit pressing ring 8, and lens barrel rear end is convex before 9 rear end of expansion ring heads on
On edge 14；Limit pressing ring 8 and preceding lens barrel 5 are folded with sealing ring 15 radially, make camera lens waterproof, gas-tight.
In the present embodiment, outer tube rear end is provided with the thread of M34X0.75-6g, can be with LWIR Uncooled type
640 × 512,17 μm of detector adaptations, execute document recording and safety monitoring task.
In the present embodiment, the airspace between the plano-convex lens and biconcave lens is 1.5mm, biconcave lens and just
Airspace between crescent lens is 11mm.
In the present embodiment, the light material of all eyeglasses is germanium, and plano-convex lens 1, biconcave lens 2 and positive crescent are saturating
The refractive index of mirror 3 is 4.004；The preceding curvature mirror radius of the plano-convex lens is 38mm, the preceding mirror surface of biconcave lens and rear mirror
The radius of curvature in face is respectively 80mm and 45mm, and the radius of curvature of the positive preceding mirror surface of crescent lens and rear mirror surface is respectively 86.2mm
And 1336mm.
In the present embodiment, plano-convex lens 1 with a thickness of 2.8mm, biconcave lens 2 with a thickness of 1.9mm, positive crescent is saturating
Mirror 3 with a thickness of 3.5mm, the spacing after positive crescent lens 3 between mirror surface and image planes is 8.3mm.
The reasonable distribution focal power in optical design, so that the mobile lesser distance of plano-convex lens realizes high/low temperature compensation；
It is cooperated in structure design by the multilayer lens barrel structure of different heat expansion coefficient, drives plano-convex lens mobile, realized high
Low temperature is adaptively without thermalization technology.It is calculated according to optical design, plano-convex lens A amount of movement is -0.05mm/+0.03mm, and plano-convex is saturating
Mirror is negative far from detector, is positive close to detector.
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 '=19mm；
(3) detector: 640 × 512,17 μm of LWIR Uncooled type；
(4) field angle: 31.6 ° × 25.3 °；
(5) relative aperture D/ f ': 1/1.0.
The low distortion LONG WAVE INFRARED passive type of high sharpness of the present invention is without thermalization camera lens: (1) in optical design, Rational choice light
Learn structure reduces processing cost and the assembly of system is made to become simple so that system structure becomes more compact；(2)
In optical design, by reasonable distribution focal power, so that the mobile lesser distance of plano-convex lens A realizes high/low temperature compensation；(3)
In optical design, by reasonable distribution focal power, guarantee that optical system has high imaging resolution；(4) guaranteeing structure
It under the premise of compact, adopts a series of measures, improves camera lens vibration resistance, the ability of impact；(5) body tube has good close
Sealing property；Rigidity Calculation is carried out in lens construction design, suitably increase wall thickness, improved intrinsic frequency, has improved the anti-of camera lens
Vibration ability guarantees the requirement of system；Meanwhile each sealing position is sealed using sealing ring, guarantees the sealing performance of camera lens.
Low distortion adjusting method of the LONG WAVE INFRARED passive type without thermalization camera lens of a kind of high sharpness, using Gao Rui as described above
Low distortion LONG WAVE INFRARED passive type is spent without thermalization camera lens, and when temperature, which changes, deviates image planes, expansion ring is because of heat expansion
Shrinkage realizes that expansion fit elastomeric pad makes preceding lens barrel that axial displacement occur, image plane offset caused by being changed with compensation temperature.
Above-listed preferred embodiment, has been further described the object, technical solutions and advantages of the present invention, is answered
Understand, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of low distortion LONG WAVE INFRARED passive type of high sharpness is without thermalization camera lens, it is characterised in that: the optical system of the camera lens
It is middle that along light, incident direction is successively arranged plano-convex lens, biconcave lens and positive crescent lens, the light of all eyeglasses from front to back
Wire material is germanium, and the refractive index of plano-convex lens 1, biconcave lens 2 and positive crescent lens 3 is 4.004；The plano-convex lens
Airspace between biconcave lens is 1.5mm, and the airspace between biconcave lens and positive crescent lens is 11mm；Institute
The preceding curvature mirror radius for stating plano-convex lens is 38mm, the radius of curvature of the preceding mirror surface of biconcave lens and rear mirror surface be respectively 80mm and
The radius of curvature of 45mm, the positive preceding mirror surface of crescent lens and rear mirror surface is respectively 86.2mm and 1336mm；The thickness of plano-convex lens 1
For 2.8mm, biconcave lens 2 with a thickness of 1.9mm, positive crescent lens 3 with a thickness of 3.5mm, mirror surface after positive crescent lens 3
Spacing between image planes is 8.3mm；The mechanical structure of the camera lens includes outer cylinder, and preceding lens barrel and rear mirror are arranged in outer cylinder
Cylinder, before plano-convex lens are installed in lens barrel, biconcave lens and positive crescent lens are installed in rear lens barrel, preceding lens barrel and rear lens barrel
Between be folded with elastomeric pad, be screwed with the limit pressing ring positioned at preceding lens barrel periphery inside outer cylinder front end, limit pressing ring and preceding mirror
Cylinder is folded with the expansion ring that can be expanded with heat and contract with cold in the axial direction to move axially by lens barrel before expansion ring extension and contraction control.
2. the low distortion LONG WAVE INFRARED passive type of high sharpness according to claim 1 is without thermalization camera lens, it is characterised in that: described
Expansion ring uses POM material, is connected through a screw thread between lens barrel and outer cylinder after described, has after heading on rear lens barrel in outer cylinder
The hole platform of end, rear lens barrel rear end are also screwed with the rear pressing ring for heading on positive crescent lens rear edge, are provided in rear lens barrel
Spacer ring between biconcave lens and positive crescent lens；The preceding pressure for heading on plano-convex lens front edge is screwed in preceding lens barrel
Circle.
3. the low distortion LONG WAVE INFRARED passive type of high sharpness according to claim 2 is without thermalization camera lens, it is characterised in that: described
Expansion ring front end heads on limit pressing ring, before expansion ring rear end heads on the flange of lens barrel rear end；Pressing ring and preceding lens barrel are limited in diameter
It is folded with sealing ring upwards.
4. low distortion adjusting method of the LONG WAVE INFRARED passive type without thermalization camera lens of a kind of high sharpness, using as claimed in claim 2
The low distortion LONG WAVE INFRARED passive type of high sharpness without thermalization camera lens, it is characterised in that: when temperature changes, that image planes occur is inclined
From when, expansion ring realizes that axial displacement occurs for lens barrel before expansion fit elastomeric pad makes, and is changed with compensation temperature because expanding with heat and contract with cold
Caused image plane offset.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611170393.6A CN106443983B (en) | 2016-12-16 | 2016-12-16 | The low distortion LONG WAVE INFRARED passive type of high sharpness is without thermalization camera lens and its adjusting method |
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| CN201611170393.6A CN106443983B (en) | 2016-12-16 | 2016-12-16 | The low distortion LONG WAVE INFRARED passive type of high sharpness is without thermalization camera lens and its adjusting method |
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| CN106443983B true CN106443983B (en) | 2019-01-01 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109814240B (en) * | 2018-12-28 | 2024-10-01 | 玉晶光电股份有限公司 | Optical imaging lens |
| CN110261982B (en) * | 2019-07-03 | 2024-09-10 | 福建福光天瞳光学有限公司 | Infrared lens with detachable sealing structure and assembly method thereof |
| CN112034583B (en) * | 2020-08-25 | 2022-11-11 | 长春长光智欧科技有限公司 | High-integration complete machine device for microscope objective |
| CN112394469B (en) * | 2020-12-01 | 2023-03-10 | 天津津航技术物理研究所 | High-precision mechanical passive athermalization all-silicon lens |
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2016
- 2016-12-16 CN CN201611170393.6A patent/CN106443983B/en active Active
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| CN205027954U (en) * | 2015-10-12 | 2016-02-10 | 福建福光股份有限公司 | Non - refrigeration long wave infrared optical -mechanical does not have camera lens of heating |
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