CN106199919A - A kind of optics athermal, high pixel, high illumination, the infra-red thermal imaging system of low cost - Google Patents
A kind of optics athermal, high pixel, high illumination, the infra-red thermal imaging system of low cost Download PDFInfo
- Publication number
- CN106199919A CN106199919A CN201610847411.3A CN201610847411A CN106199919A CN 106199919 A CN106199919 A CN 106199919A CN 201610847411 A CN201610847411 A CN 201610847411A CN 106199919 A CN106199919 A CN 106199919A
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- China
- Prior art keywords
- eyeglass
- lens
- low cost
- imaging system
- infra
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Links
- 238000005286 illumination Methods 0.000 title claims abstract description 16
- 238000001931 thermography Methods 0.000 title claims abstract description 14
- 239000005387 chalcogenide glass Substances 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 7
- 238000003384 imaging method Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 15
- 229910052732 germanium Inorganic materials 0.000 description 6
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000005083 Zinc sulfide Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
Classifications
-
- 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
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- 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
Abstract
The present invention relates to a kind of optics athermal, high pixel, high illumination, the infra-red thermal imaging system of low cost; it is characterized in that: include the diaphragm (1) set gradually; first eyeglass (2); second eyeglass (3); 3rd eyeglass (4); protection glass (5) and sensitive chip (6); described first eyeglass (2), the second eyeglass (3), the 3rd eyeglass (4) are the aspherical lens of chalcogenide glass, and this imaging system optics disappears, and heat is good, pixel is high, illumination is high, low cost.
Description
[technical field]
The present invention relates to a kind of optical imaging system, particularly relate to a kind of be applied to monitoring, the optics of onboard system disappears heat
Pixel poor, high, high illumination, the infra-red thermal imaging system of low cost.
[background technology]
Infrared thermal imaging camera lens used by monitoring, onboard system generally disadvantage is that camera lens heat differential is big, becomes at present
This is high, and it generally uses crystal germanium and zinc sulfide material carries out imaging, and this two classes material price is higher, and in processing aspheric
Can only carry out turnery processing during the lens of face, processing cost is high, thus causes infrared thermal imaging camera lens relatively costly, both materials
Thermal refractive index coefficient very big, heat differential is big, needs to use machinery athermal, and this will improve cost again.
Owing to there are the problems referred to above, it is necessary to it is proposed solution, and the present invention makes the most in this context
's.
[summary of the invention]
The technical problem to be solved is for above-mentioned deficiency of the prior art, it is provided that a kind of optics disappears heat
Pixel poor, high, high illumination, the infra-red thermal imaging system of low cost, this imaging system optics disappears, and heat is good, pixel is high, illumination is high, one-tenth
This is low.
For achieving the above object, present invention employs following technical proposals:
A kind of optics athermal, high pixel, high illumination, the infra-red thermal imaging system of low cost, including the light set gradually
Door screen 1, the first eyeglass 2, the second eyeglass 3, the 3rd eyeglass 4, protection glass 5 and sensitive chip 6, described first eyeglass the 2, second mirror
Sheet the 3, the 3rd eyeglass 4 is the aspherical lens of chalcogenide glass.
The focal length of the first eyeglass the 2, the 3rd eyeglass 4 described above is just, the focal length of described second eyeglass 3 is negative.
The aspheric surface face type of first eyeglass the 2, second eyeglass the 3, the 3rd eyeglass 4 described above meets equation:
In aforesaid equation, parameter c is the song corresponding to radius of described first eyeglass the 2, second eyeglass the 3, the 3rd eyeglass 4
Rate, y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone whose conic coefficient；When k-factor is less than-1,
The face sigmoid curves of lens is hyperbola；When k-factor is equal to-1, the face sigmoid curves of lens is parabola；When k-factor arrives between-1
Time between 0, the face sigmoid curves of lens is oval, and when k-factor is equal to 0, the face sigmoid curves of lens is circular, when k-factor is more than 0
Time, the face sigmoid curves of lens is oblate；α1To α8Represent the coefficient corresponding to each radial coordinate respectively.
Sensitive chip 6 is uncooled fpa detector as mentioned above, and its Pixel Dimensions is 17 μ m 17 μm, and resolution is
640*512, diagonal height is 13.93mm.
The invention has the beneficial effects as follows:
1, existing high pixel imaging lens commonly used germanite glass aspheric surface and machinery athermal method, the present invention uses
Chalcogenide glass at a low price, the aspheric surface of chalcogenide glass can carry out molding processing, so that processing cost reduces.
2, the thermal refractive index coefficient of chalcogenide glass is the 1/10 of germanium crystal material, therefore uses the solution picture of chalcogenide glass system
Vary with temperature less, resolution can be realized by optics athermal stable, reduce complexity and the cost of structure.
3, this camera lens uses wide spectrum 8 microns to 12 microns, and 1:1:1:1 designs, and has fabulous figure at far red light wave band
As sharpness, whole picture can blur-free imaging.
4, present configuration is simple, with low cost, is suitable for popularization and application.
[accompanying drawing explanation]
Fig. 1 is the schematic diagram of the present invention.
[detailed description of the invention]
Below in conjunction with the accompanying drawings the present invention is done further detailed description.
As it is shown in figure 1, a kind of optics athermal, high pixel, high illumination, the infra-red thermal imaging system of low cost, including depending on
The diaphragm 1 of secondary setting, the first eyeglass 2, the second eyeglass 3, the 3rd eyeglass 4, protection glass 5 and sensitive chip 6, described first mirror
Sheet the 2, second eyeglass the 3, the 3rd eyeglass 4 is the aspherical lens of chalcogenide glass, this imaging system optics disappear heat good, pixel is high,
Illumination is high, low cost.
As it is shown in figure 1, in the present embodiment, the focal length of described first eyeglass the 2, the 3rd eyeglass 4 is just, described second eyeglass
The focal length of 3 is negative.
As it is shown in figure 1, in the present embodiment, the aspheric surface face type of described first eyeglass the 2, second eyeglass the 3, the 3rd eyeglass 4
Meet equation:
In aforesaid equation, parameter c is the song corresponding to radius of described first eyeglass the 2, second eyeglass the 3, the 3rd eyeglass 4
Rate, y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone whose conic coefficient；When k-factor is less than-1,
The face sigmoid curves of lens is hyperbola；When k-factor is equal to-1, the face sigmoid curves of lens is parabola；When k-factor arrives between-1
Time between 0, the face sigmoid curves of lens is oval, and when k-factor is equal to 0, the face sigmoid curves of lens is circular, when k-factor is more than 0
Time, the face sigmoid curves of lens is oblate；α1To α8Represent the coefficient corresponding to each radial coordinate respectively.
As it is shown in figure 1, in the present embodiment, described sensitive chip 6 is uncooled fpa detector, and its Pixel Dimensions is
17 μ m 17 μm, resolution is 640*512, and diagonal height is 13.93mm.
The implementation method of optics athermal: utilize infrared sulfur based material.Present infrared main material has germanium crystal and sulfur system
Glass material.Owing to germanium belongs to crystal, its thermal refractive index coefficient is relatively big, is ten times of chalcogenide glass.Therefore employing chalcogenide glass
Its performance of material varies with temperature less, it is possible to realize optics athermal.
The implementation method of high pixel is: reasonably distribution the first eyeglass the 2, second eyeglass 3 and focal length of the 3rd eyeglass 4, and
Select suitable refraction materials according to focal length, thus reach high efficiency material adapted；Further, aspheric surface is used to correct red
The defect of outer aberration；It addition, aberration is corrected while considering lifting center resolution when design of Optical System, thus
The image quality making surrounding visual field is uniform.
The realization means of high illumination is: when design of Optical System, by reducing vignetting, does not even set vignetting to ensure limit
Edge light as much as possible arrives sensitive chip 6, and by controlling the refraction angle of rim ray, thus reduce the damage of light
Lose, thus reach the requirement of high illumination.
The implementation method of low cost is: the system uses full sulfur system infra-red material.Conventional infra-red thermal imaging system is many
Using germanium and zinc sulphide materials, both materials must carry out turnery processing.Use the non-spherical lens of chalcogenide glass material, sulfur
Can carry out when being glass manufacture non-spherical lens molding processing.Working (machining) efficiency is high, with low cost, it is to avoid traditional aspheric surface is saturating
The high cost problem that mirror uses germanium material to need turnery processing and brings, so that the cost of this system reduces.
It is the novel actual design case of the present invention below:
The asphericity coefficient in each face:
Its three pieces of eyeglass aspheric surface face types meet below equation:
In aforesaid equation, parameter c is the song corresponding to radius of described first eyeglass the 2, second eyeglass the 3, the 3rd eyeglass 4
Rate, y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone whose conic coefficient；When k-factor is less than-1,
The face sigmoid curves of lens is hyperbola；When k-factor is equal to-1, the face sigmoid curves of lens is parabola；When k-factor arrives between-1
Time between 0, the face sigmoid curves of lens is oval, and when k-factor is equal to 0, the face sigmoid curves of lens is circular, when k-factor is more than 0
Time, the face sigmoid curves of lens is oblate；α1To α8Represent the coefficient corresponding to each radial coordinate respectively.
Claims (4)
1. an optics athermal, high pixel, high illumination, the infra-red thermal imaging system of low cost, it is characterised in that: include successively
The diaphragm (1) arranged, the first eyeglass (2), the second eyeglass (3), the 3rd eyeglass (4), protection glass (5) and sensitive chip (6),
Described first eyeglass (2), the second eyeglass (3), the 3rd eyeglass (4) are the aspherical lens of chalcogenide glass.
Optics athermal the most according to claim 1, high pixel, high illumination, the infra-red thermal imaging system of low cost, it is special
Levy and be: described first eyeglass (2), the focal length of the 3rd eyeglass (4) are that just the focal length of described second eyeglass (3) is negative.
Optics athermal the most according to claim 1 and 2, high pixel, high illumination, the infra-red thermal imaging system of low cost,
It is characterized in that: described first eyeglass (2), the second eyeglass (3), the aspheric surface face type of the 3rd eyeglass (4) meet equation:
In aforesaid equation, parameter c is corresponding to the radius of described first eyeglass (2), the second eyeglass (3), the 3rd eyeglass (4)
Curvature, y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone whose conic coefficient；When k-factor is less than-1
Time, the face sigmoid curves of lens is hyperbola；When k-factor is equal to-1, the face sigmoid curves of lens is parabola；When k-factor between-
Time between 1 to 0, the face sigmoid curves of lens is oval, and when k-factor is equal to 0, the face sigmoid curves of lens is circular, when k-factor is big
In 0 time, the face sigmoid curves of lens is oblate；α1To α8Represent the coefficient corresponding to each radial coordinate respectively.
Optics athermal the most according to claim 3, high pixel, high illumination, the infra-red thermal imaging system of low cost, it is special
Levying and be: described sensitive chip (6) is uncooled fpa detector, its Pixel Dimensions is 17 μ m 17 μm, and resolution is
640*512, diagonal height is 13.93mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847411.3A CN106199919B (en) | 2016-09-23 | 2016-09-23 | A kind of infra-red thermal imaging system of optics athermal, high pixel, high illumination, low cost |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610847411.3A CN106199919B (en) | 2016-09-23 | 2016-09-23 | A kind of infra-red thermal imaging system of optics athermal, high pixel, high illumination, low cost |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106199919A true CN106199919A (en) | 2016-12-07 |
| CN106199919B CN106199919B (en) | 2018-10-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610847411.3A Active CN106199919B (en) | 2016-09-23 | 2016-09-23 | A kind of infra-red thermal imaging system of optics athermal, high pixel, high illumination, low cost |
Country Status (1)
| Country | Link |
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| CN (1) | CN106199919B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842524A (en) * | 2017-03-30 | 2017-06-13 | 中山联合光电科技股份有限公司 | A kind of optics athermal, pixel high, high illumination, inexpensive thermal imaging system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387738A (en) * | 2007-09-10 | 2009-03-18 | 住友电气工业株式会社 | Far-infrared camera lens, lens unit, and imaging apparatus |
| JP2013015636A (en) * | 2011-07-01 | 2013-01-24 | Tamron Co Ltd | Infrared zoom lens |
| CN203224663U (en) * | 2012-09-17 | 2013-10-02 | 河南中光学集团有限公司 | Non-focusing athermalization infrared optical system |
| CN103941378A (en) * | 2013-01-08 | 2014-07-23 | 浙江科技学院 | Far-infrared lens based on diffraction aspherical lens capable of being mould-pressed |
| CN203759344U (en) * | 2014-01-24 | 2014-08-06 | 宁波舜宇红外技术有限公司 | Novel high-luminous flux long-wave infrared athermalization camera lens |
-
2016
- 2016-09-23 CN CN201610847411.3A patent/CN106199919B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387738A (en) * | 2007-09-10 | 2009-03-18 | 住友电气工业株式会社 | Far-infrared camera lens, lens unit, and imaging apparatus |
| JP2013015636A (en) * | 2011-07-01 | 2013-01-24 | Tamron Co Ltd | Infrared zoom lens |
| CN203224663U (en) * | 2012-09-17 | 2013-10-02 | 河南中光学集团有限公司 | Non-focusing athermalization infrared optical system |
| CN103941378A (en) * | 2013-01-08 | 2014-07-23 | 浙江科技学院 | Far-infrared lens based on diffraction aspherical lens capable of being mould-pressed |
| CN203759344U (en) * | 2014-01-24 | 2014-08-06 | 宁波舜宇红外技术有限公司 | Novel high-luminous flux long-wave infrared athermalization camera lens |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842524A (en) * | 2017-03-30 | 2017-06-13 | 中山联合光电科技股份有限公司 | A kind of optics athermal, pixel high, high illumination, inexpensive thermal imaging system |
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| Publication number | Publication date |
|---|---|
| CN106199919B (en) | 2018-10-09 |
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