CN107479174A - A kind of LONG WAVE INFRARED optical system - Google Patents
A kind of LONG WAVE INFRARED optical system Download PDFInfo
- Publication number
- CN107479174A CN107479174A CN201710781729.0A CN201710781729A CN107479174A CN 107479174 A CN107479174 A CN 107479174A CN 201710781729 A CN201710781729 A CN 201710781729A CN 107479174 A CN107479174 A CN 107479174A
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- China
- Prior art keywords
- crescent moon
- moon lens
- focusing
- positive
- lens
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The present invention relates to a kind of LONG WAVE INFRARED optical system, including along the light positive crescent moon lens A that incident direction is set gradually from front to back, negative crescent moon lens B and positive crescent moon lens C, the positive airspace between crescent moon lens A and negative crescent moon lens B is 34mm, airspace between the negative crescent moon lens B and positive crescent moon lens C is 5mm, and positive crescent moon lens C to image planes distance is 11.8mm.LONG WAVE INFRARED optical system structure of the present invention is simple, possesses the features such as object lens of large relative aperture, small in volume and high transmittance；It can be adapted to 640 × 480,17 μm of detectors of LWIR Uncooled type, carry out document recording and monitor task；Carry out balance system aberration using even aspheric surface so that the structure of optical system is more simplified, and image quality is more preferable.
Description
Technical field
The present invention relates to a kind of LONG WAVE INFRARED optical system, belong to optical technical field.
Background technology
Infrared lens have night operating distance remote；It is strong to penetrate flue dust, haze ability；Good in anti-interference performance；Image is directly perceived,
It is easy to observe；Can round-the-clock, round-the-clock work；With the observation of multiple target panorama, tracking and target identification ability and good anti-
The advantages that target stealth ability.Infrared lens are generally used for interior or environmental condition is preferably outdoor, to camera lens volume weight
Measure and vibrate less demanding.Because the big weight weight of common focal length infrared lens volume, mechanical strength are low.And vibrated in big root mean square
In the presence of overload, the installation way such as provided is improper, can loosen eyeglass, cause image planes to be drifted about, what detector was collected into
Image is fuzzy even to can't see image completely；More serious, it would be possible to cause eyeglass fragmentation, can not meet unmanned plane surely as platform
Requirement.
The content of the invention
In view of this, it is an object of the invention to provide a kind of small volume, LONG WAVE INFRARED optical system in light weight.
The present invention is realized using following scheme：A kind of LONG WAVE INFRARED optical system, including along light incidence side from front to back
To the positive crescent moon lens A set gradually, negative crescent moon lens B and positive crescent moon lens C, the positive crescent moon lens A and negative crescent moon lens B
Between airspace be 34mm, the airspace between the negative crescent moon lens B and positive crescent moon lens C is 5mm, and positive crescent moon is saturating
Mirror C to the distance of image planes be 11.8mm.
Further, the radius of curvature of minute surface is respectively 20mm before the positive crescent moon lens A<R<60mm, rear minute surface are non-
Sphere, thickness 4.5mm, refractive index 4.0；The radius of curvature of the negative preceding minute surfaces of crescent moon lens B and rear minute surface is respectively 40mm<R<
80mm and 10mm<R<40mm, thickness 2.3mm, refractive index 2.4；The curvature of the positive preceding minute surfaces of crescent moon lens C and rear minute surface half
Footpath is respectively 30mm<R<60mm and 40mm<R<80mm, thickness 3.7mm, refractive index 4.0.
Further, in addition to install positive crescent moon lens A and negative crescent moon lens B body tube, primary mirror tube rear end set
Provided with focusing barrel, be provided with focusing barrel can the movable microscope base of relative focus lens barrel, the positive crescent moon lens C installations
In on the microscope base；The focusing barrel periphery is arranged with the focusing ring for rotating cooperation, and the focusing ring is dialled by focusing on
Nail drives microscope base to move forward and backward.
Further, the focusing group spins after following closely through the guiding straight trough of the cam path on focusing ring and focusing barrel
In on microscope base；The focusing barrel sidepiece is provided with focus motor, be provided with the motor shaft of focus motor with focusing ring
The focusing gear that external toothing is meshed.
Compared with prior art, the invention has the advantages that：
（1）It is simple in construction, possess the features such as object lens of large relative aperture, small in volume and high transmittance；
（2）It can be adapted to 640 × 480,17 μm of detectors of LWIR Uncooled type, carry out document recording and monitor task；
（3）The present invention carrys out balance system aberration using even aspheric surface so that the structure of optical system is more simplified, and image quality is more
It is good.
For the objects, technical solutions and advantages of the present invention are more clearly understood, specific embodiment and phase will be passed through below
Accompanying drawing is closed, the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is optical system schematic diagram of the embodiment of the present invention；
Fig. 2 is structure sectional view of the embodiment of the present invention；
Fig. 3 is structural representation of the embodiment of the present invention；
Label declaration in figure：Positive crescent moon lens A, the 2- of 1- bears positive crescent moon lens C, 4- body tube of crescent moon lens B, 3-, 5- focus lamps
Cylinder, 6- microscope bases, 7- focusing rings, 8- focus motors, 9- focus on gear, 10- trim rings.
Embodiment
As shown in Fig. 1 ~ 3, a kind of LONG WAVE INFRARED optical system, including incident direction is set gradually from front to back along light
Positive crescent moon lens A, negative crescent moon lens B and positive crescent moon lens C, the material of each lens is germanium；The positive crescent moon lens A is with bearing
Airspace between crescent moon lens B is 34mm, and the airspace between the negative crescent moon lens B and positive crescent moon lens C is
5mm, positive crescent moon lens C to image planes distance are 11.8mm.
In the present embodiment, the radius of curvature of minute surface is respectively 20mm before the positive crescent moon lens A<R<60mm, rear minute surface
To be aspherical, thickness 4.5mm, refractive index 4.0；The radius of curvature of the negative preceding minute surfaces of crescent moon lens B and rear minute surface is respectively
40mm<R<80mm and 10mm<R<40mm, thickness 2.3mm, refractive index 2.4；The positive preceding minute surfaces of crescent moon lens C and rear minute surface
Radius of curvature is respectively 30mm<R<60mm and 40mm<R<80mm, thickness 3.7mm, refractive index 4.0.
In the present embodiment, the face type equation of minute surface is as follows after positive crescent moon lens A：
Z represents the position of optical axis direction, and r represents the height in the vertical direction of relative optical axis, and c represents radius of curvature, and k represents circle
Bore coefficient,、、、... represent asphericity coefficient.
Aspherical surface data is as shown in the table：
In aspherical surface data, E-n representatives "", such as 2.088E-006 representatives。
The optical system being made up of above-mentioned lens set has reached following technical indicator：
（1）Service band：8μm-14μm；
（2）Focal length：f′=50mm；
（3）Detector：640 × 480,17 μm of LWIR Uncooled type；
（4）The angle of visual field：12.4°×9.3°；
（5）Relative aperture D/ f '：1/1.0.
LONG WAVE INFRARED optical system of the present invention possesses the features such as object lens of large relative aperture, small in volume and high transmittance；
It can be adapted to 640 × 480,17 μm of detectors of LWIR Uncooled type, carry out document recording and monitor task；Use
Even aspheric surface carrys out balance system aberration so that the structure of optical system is more simplified, and image quality is more preferable；The present invention removes and uses machine
Outside the more excellent sulphur system of tool performance and zinc selenide, reasonable distribution focal power, driven by the lens barrel combination of materials of the different coefficients of expansion
The movement of whole group lens realizes the mechanical passive type of temperature self-adaptation without thermalization feature to compensate image planes drift；Provide appropriate dress
Folder mode, and by the safety coefficient of each eyeglass of Solid works analyses, finally find out safety coefficient height and as good light of fine quality
Learn structure.The intrinsic frequency of raising system, the resistance to shock of strengthening system, and can with LWIR Uncooled type 1024 ×
768,17 μm；Detector is adapted to.The requirement of the big vibration overload of guarantee system.
In the present embodiment, in addition to install positive crescent moon lens A and negative crescent moon lens B body tube 4, after body tube
End is arranged with focusing barrel 5, be provided with focusing barrel 5 can the movable microscope base 6 of relative focus lens barrel 5, the positive crescent moon
Lens C is installed on the microscope base 6；The periphery of focusing barrel 5 is arranged with the focusing ring 7 for rotating cooperation, the focusing
Ring 7 is moved forward and backward by focusing on group drive microscope bases of nail 8.
In the present embodiment, described focus on dials nail 8 through the cam path 9 and the guiding straight trough of focusing barrel on focusing ring
After be rotatably connected on microscope base, focus on dial nail with cam path and be oriented to straight trough is slidably matched, cam path and guiding straight trough be three
And it is spaced 120 ° uniformly；The focusing barrel sidepiece is provided with focus motor 10, is provided with and gathers on the motor shaft of focus motor
The focusing gear 11 that external toothing on burnt ring is meshed, when focusing on the drive focusing ring rotation of gear 10, nail is dialled by spiral shell by focusing on
Rotation motion is converted to axial movement, so as to drive the movable of microscope base, realizes focusing function.
The object, technical solutions and advantages of the present invention are further described by above-listed preferred embodiment, are answered
Understand, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (4)
- A kind of 1. LONG WAVE INFRARED optical system, it is characterised in that：Including along light, incident direction is set gradually just from front to back Crescent moon lens A, negative crescent moon lens B and positive crescent moon lens C, the positive airspace between crescent moon lens A and negative crescent moon lens B For 34mm, the airspace between the negative crescent moon lens B and positive crescent moon lens C is 5mm, positive crescent moon lens C to image planes away from From for 11.8mm.
- 2. LONG WAVE INFRARED optical system according to claim 1, it is characterised in that：Minute surface before the positive crescent moon lens A Radius of curvature is respectively 20mm<R<60mm, rear minute surface are aspherical, thickness 4.5mm, refractive index 4.0；Negative crescent moon lens B The radius of curvature of preceding minute surface and rear minute surface is respectively 40mm<R<80mm and 10mm<R<40mm, thickness 2.3mm, refractive index is 2.4；The radius of curvature of the positive preceding minute surfaces of crescent moon lens C and rear minute surface is respectively 30mm<R<60mm and 40mm<R<80mm, thickness are 3.7mm, refractive index 4.0.
- 3. LONG WAVE INFRARED optical system according to claim 1, it is characterised in that：Also include to install positive crescent moon lens A and negative crescent moon lens B body tube, primary mirror tube rear end are arranged with focusing barrel, and being provided with focusing barrel can relative focus mirror The movable microscope base of cylinder, the positive crescent moon lens C are installed on the microscope base；The focusing barrel periphery is arranged with revolves with it Turn the focusing ring coordinated, the focusing ring drives microscope base to move forward and backward by focusing on to dial to follow closely.
- 4. LONG WAVE INFRARED optical system according to claim 2, it is characterised in that：The focusing, which is dialled, follows closely through on focusing ring Cam path and focusing barrel guiding straight trough after be rotatably connected on microscope base；The focusing barrel sidepiece is provided with focus motor, The focusing gear being meshed with the external toothing on focusing ring is installed on the motor shaft of focus motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710781729.0A CN107479174A (en) | 2017-09-02 | 2017-09-02 | A kind of LONG WAVE INFRARED optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710781729.0A CN107479174A (en) | 2017-09-02 | 2017-09-02 | A kind of LONG WAVE INFRARED optical system |
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| Publication Number | Publication Date |
|---|---|
| CN107479174A true CN107479174A (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710781729.0A Pending CN107479174A (en) | 2017-09-02 | 2017-09-02 | A kind of LONG WAVE INFRARED optical system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109407285A (en) * | 2018-12-29 | 2019-03-01 | 福建福光天瞳光学有限公司 | A kind of auto-manual focusing infrared lens and its working method |
| 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 |
| CN110261982A (en) * | 2019-07-03 | 2019-09-20 | 福建福光天瞳光学有限公司 | Infrared lens and its assembly method with detachable-type sealed structure |
| CN111722351A (en) * | 2020-06-30 | 2020-09-29 | 福建福光天瞳光学有限公司 | Long-wave electric focusing high-pixel high-resolution infrared lens and assembling method thereof |
| CN113534420A (en) * | 2021-07-21 | 2021-10-22 | 苏州东方克洛托光电技术有限公司 | Long-wave infrared imaging optical system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010039243A (en) * | 2008-08-06 | 2010-02-18 | Fujinon Corp | Infrared lens and imaging apparatus |
| CN102289055A (en) * | 2011-08-25 | 2011-12-21 | 福建福光数码科技有限公司 | Uncooled long-wave infrared camera lens |
| JP2014109638A (en) * | 2012-11-30 | 2014-06-12 | Tamron Co Ltd | Infrared lens |
| CN204086667U (en) * | 2014-10-28 | 2015-01-07 | 福建福光数码科技有限公司 | The non-brake method LONG WAVE INFRARED camera lens of anti-high-strength impact |
| CN106990513A (en) * | 2017-05-10 | 2017-07-28 | 福建福光天瞳光学有限公司 | Electromotion focusing formula uncooled ir is dolly-out,ed dolly-back type camera lens and its method of work |
-
2017
- 2017-09-02 CN CN201710781729.0A patent/CN107479174A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010039243A (en) * | 2008-08-06 | 2010-02-18 | Fujinon Corp | Infrared lens and imaging apparatus |
| CN102289055A (en) * | 2011-08-25 | 2011-12-21 | 福建福光数码科技有限公司 | Uncooled long-wave infrared camera lens |
| JP2014109638A (en) * | 2012-11-30 | 2014-06-12 | Tamron Co Ltd | Infrared lens |
| CN204086667U (en) * | 2014-10-28 | 2015-01-07 | 福建福光数码科技有限公司 | The non-brake method LONG WAVE INFRARED camera lens of anti-high-strength impact |
| CN106990513A (en) * | 2017-05-10 | 2017-07-28 | 福建福光天瞳光学有限公司 | Electromotion focusing formula uncooled ir is dolly-out,ed dolly-back type camera lens and its method of work |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109407285A (en) * | 2018-12-29 | 2019-03-01 | 福建福光天瞳光学有限公司 | A kind of auto-manual focusing infrared lens and its working method |
| 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 |
| CN110261982A (en) * | 2019-07-03 | 2019-09-20 | 福建福光天瞳光学有限公司 | Infrared lens and its assembly method with detachable-type sealed structure |
| CN111722351A (en) * | 2020-06-30 | 2020-09-29 | 福建福光天瞳光学有限公司 | Long-wave electric focusing high-pixel high-resolution infrared lens and assembling method thereof |
| CN113534420A (en) * | 2021-07-21 | 2021-10-22 | 苏州东方克洛托光电技术有限公司 | Long-wave infrared imaging optical system |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171215 |
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| RJ01 | Rejection of invention patent application after publication |