CN206039012U - Infrared thermal imaging system of optics - Google Patents
Infrared thermal imaging system of optics Download PDFInfo
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- CN206039012U CN206039012U CN201621077245.5U CN201621077245U CN206039012U CN 206039012 U CN206039012 U CN 206039012U CN 201621077245 U CN201621077245 U CN 201621077245U CN 206039012 U CN206039012 U CN 206039012U
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- eyeglass
- lens
- imaging system
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- thermal imaging
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Abstract
The utility model relates to an infrared thermal imaging system of optics, its characterized in that: including diaphragm (1) that sets gradually, first lens (2), second lens (3), third lens (4), protection glass (5) and sense optical chip (6), it is glass's aspherical mirror piece that first lens (2), second lens (3), third lens (4) are sulphur, this imaging system optics disappear heat up, the pixel is high, illuminance is high, with low costs.
Description
【Technical field】
This utility model is related to a kind of optical imaging system, more particularly to it is a kind of be applied to monitoring, the optics of onboard system
Infra-red thermal imaging system.
【Background technology】
Shortcoming as infrared thermal imaging camera lens generally existing used by current monitoring, onboard system:Camera lens heat differential is big, into
This is high, and which generally uses crystal germanium and zinc sulfide material is imaged, and this two classes material price is higher, and in processing aspheric
Can only carry out turnery processing during the lens of face, high processing costs, so as to cause infrared thermal imaging camera lens relatively costly, both materials
Thermal refractive index coefficient it is very big, heat differential is big, needs using mechanical athermal, and this will improve cost again.
Due to there are the problems referred to above, it is necessary to propose solution to which, this utility model is exactly in this context
Make.
【Utility model content】
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, there is provided a kind of optics
Infra-red thermal imaging system, the imaging system optics disappears, and hot good, pixel is high, illumination is high, low cost.
For achieving the above object, this utility model employs following technical proposals：
A kind of optical infrared thermal imaging system, including the diaphragm 1 for setting gradually, the first eyeglass 2, the second eyeglass 3, the 3rd mirror
Piece 4, protective glass 5 and sensitive chip 6, first eyeglass 2, the second eyeglass 3, the 3rd eyeglass 4 are the non-of chalcogenide glass
Spherical lenses.
First eyeglass 2 as described above, the focal length of the 3rd eyeglass 4 are for just, the focal length of second eyeglass 3 is negative.
First eyeglass 2 as described above, the second eyeglass 3, the aspheric surface face type of the 3rd eyeglass 4 meet equation：
In aforesaid equation, parameter c is the song corresponding to first eyeglass 2, the second eyeglass 3, the radius of the 3rd eyeglass 4
Rate, y are 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 is arrived between -1
When between 0, the face sigmoid curves of lens is ellipse, and when k-factor is equal to 0, the face sigmoid curves of lens is circle, when k-factor is more than 0
When, the face sigmoid curves of lens is oblateness；α1To α8The coefficient corresponding to each radial coordinate is represented respectively.
As mentioned above sensitive chip 6 is uncooled fpa detector, and its Pixel Dimensions is 17 μm of 17 μ m, and resolution is
640*512, diagonal height are 13.93mm.
The beneficial effects of the utility model are：
1st, existing high pixel imaging lens generally adopt germanite glass aspheric surface and mechanical athermal method, this utility model
Using the chalcogenide glass of low price, the aspheric surface of chalcogenide glass can carry out molding processing, so that processing cost is reduced.
2nd, the thermal refractive index coefficient of chalcogenide glass is the 1/10 of germanium crystal material, therefore using the solution picture of chalcogenide glass system
Vary with temperature less, can realize that resolution is stable, reduces complexity and the cost of structure by optics athermal.
3rd, this camera lens adopt 8 microns to 12 microns of wide spectrum, 1:1:1:1 design, has fabulous figure in far red light wave band
As sharpness, whole picture can blur-free imaging.
4th, this utility model simple structure, it is with low cost, it is adapted to popularization and application.
【Description of the drawings】
Fig. 1 is schematic diagram of the present utility model.
【Specific embodiment】
Further detailed description is done to this utility model below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of optical infrared thermal imaging system, including the diaphragm 1 for setting gradually, the first eyeglass 2, the second mirror
Piece 3, the 3rd eyeglass 4, protective glass 5 and sensitive chip 6, first eyeglass 2, the second eyeglass 3, the 3rd eyeglass 4 are sulfur
It is the aspherical lens of glass, the imaging system optics disappears, and hot good, pixel is high, illumination is high, low cost.
As shown in figure 1, in the present embodiment, first eyeglass 2, the focal length of the 3rd eyeglass 4 are just second eyeglass
3 focal length is negative.
As shown in figure 1, in the present embodiment, 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 the song corresponding to first eyeglass 2, the second eyeglass 3, the radius of the 3rd eyeglass 4
Rate, y are 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 is arrived between -1
When between 0, the face sigmoid curves of lens is ellipse, and when k-factor is equal to 0, the face sigmoid curves of lens is circle, when k-factor is more than 0
When, the face sigmoid curves of lens is oblateness；α1To α8The coefficient corresponding to each radial coordinate is represented respectively.
As shown in figure 1, in the present embodiment, the sensitive chip 6 is uncooled fpa detector, and its Pixel Dimensions is
17 17 μm of μ ms, resolution are 640*512, and diagonal height is 13.93mm.
The implementation method of optics athermal：Using infrared sulfur based material.Infrared main material has germanium crystal and sulfur system now
Glass material.As germanium belongs to crystal, its thermal refractive index coefficient is larger, is ten times of chalcogenide glass.Therefore adopt chalcogenide glass
Material its performance varies with temperature less, can realize optics athermal.
The implementation method of high pixel is：The focal length of the first eyeglass 2 of rational distribution, the second eyeglass 3 and the 3rd eyeglass 4, and
Suitable refraction materials are selected according to focal length, so as to reach efficient material adapted；Also, correct red using aspheric surface
The defect of outer aberration；In addition, consider while lifting center resolution to be corrected aberration in design of Optical System, so as to
Make the image quality of surrounding visual field uniform.
The realization means of high illumination are：In design of Optical System, by reducing vignetting, even do not set vignetting to ensure side
Edge light as much as possible reaches sensitive chip 6, and by controlling the refraction angle of rim ray, so as to reduce the damage of light
Lose, so as to reach the requirement of high illumination.
Low cost implementation method be：The system uses full sulfur system infra-red material.Conventional infra-red thermal imaging system is more
Using germanium and zinc sulphide materials, both materials must carry out turnery processing.Using the non-spherical lens of chalcogenide glass material, sulfur
Molding processing can be carried out when being glass manufacture non-spherical lens.It is high in machining efficiency, it is with low cost, it is to avoid traditional aspheric surface is saturating
The high cost problem that mirror needs turnery processing using germanium material and brings, so that the cost of the system is reduced.
It is the new actual design case of this utility model below：
The asphericity coefficients 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 first eyeglass 2, the second eyeglass 3, the radius of the 3rd eyeglass 4
Rate, y are 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 is arrived between -1
When between 0, the face sigmoid curves of lens is ellipse, and when k-factor is equal to 0, the face sigmoid curves of lens is circle, when k-factor is more than 0
When, the face sigmoid curves of lens is oblateness；α1To α8The coefficient corresponding to each radial coordinate is represented respectively.
Claims (4)
1. a kind of optical infrared thermal imaging system, it is characterised in that：Including the diaphragm (1) for setting gradually, the first eyeglass (2),
Two eyeglasses (3), the 3rd eyeglass (4), protective glass (5) and sensitive chip (6), the first eyeglass (2), the second eyeglass (3),
3rd eyeglass (4) is the aspherical lens of chalcogenide glass.
2. optical infrared thermal imaging system according to claim 1, it is characterised in that：First eyeglass (2), the 3rd mirror
The focal length of piece (4) is for just, the focal length of the second eyeglass (3) is negative.
3. optical infrared thermal imaging system according to claim 1 and 2, it is characterised in that：First eyeglass (2),
Two eyeglasses (3), the aspheric surface face type of the 3rd eyeglass (4) meet equation：
In aforesaid equation, parameter c is corresponding to the first eyeglass (2), the second eyeglass (3), the radius of the 3rd eyeglass (4)
Curvature, y are 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
When, 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-
When between 1 to 0, the face sigmoid curves of lens is ellipse, and when k-factor is equal to 0, the face sigmoid curves of lens is circle, when k-factor it is big
When 0, the face sigmoid curves of lens is oblateness；α1To α8The coefficient corresponding to each radial coordinate is represented respectively.
4. optical infrared thermal imaging system according to claim 3, it is characterised in that：Described sensitive chip (6) are non-system
Cold focus planardetector, its Pixel Dimensions are 17 μm of 17 μ m, and resolution is 640*512, and diagonal height is 13.93mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621077245.5U CN206039012U (en) | 2016-09-23 | 2016-09-23 | Infrared thermal imaging system of optics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621077245.5U CN206039012U (en) | 2016-09-23 | 2016-09-23 | Infrared thermal imaging system of optics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206039012U true CN206039012U (en) | 2017-03-22 |
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ID=58296623
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621077245.5U Active CN206039012U (en) | 2016-09-23 | 2016-09-23 | Infrared thermal imaging system of optics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206039012U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11194125B2 (en) | 2017-05-26 | 2021-12-07 | Zhejiang Sunny Optical Co., Ltd. | Iris lens assembly |
-
2016
- 2016-09-23 CN CN201621077245.5U patent/CN206039012U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11194125B2 (en) | 2017-05-26 | 2021-12-07 | Zhejiang Sunny Optical Co., Ltd. | Iris lens assembly |
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| GR01 | Patent grant |