CN206270583U - A kind of pixel high, high illumination, the infrared thermal imaging device of low cost - Google Patents
A kind of pixel high, high illumination, the infrared thermal imaging device of low cost Download PDFInfo
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- CN206270583U CN206270583U CN201621286698.9U CN201621286698U CN206270583U CN 206270583 U CN206270583 U CN 206270583U CN 201621286698 U CN201621286698 U CN 201621286698U CN 206270583 U CN206270583 U CN 206270583U
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- lens
- low cost
- thermal imaging
- imaging device
- infrared thermal
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Abstract
The utility model discloses a kind of pixel high, high illumination, inexpensive infrared thermal imaging device, it is disposed with from thing side to image side：Diaphragm (1)；First eyeglass (2), first eyeglass (2) is spheric glass, and first eyeglass (2) uses chalcogenide glass material；Second eyeglass (3), second eyeglass (3) is aspherical lens, and second eyeglass (3) uses zinc sulphide material；3rd eyeglass (4), the 3rd eyeglass (4) is spheric glass；Protective glass (5)；Sensitive chip (6).The utility model simple structure, it is with low cost.
Description
【Technical field】
The utility model is related to optical system, especially the infrared thermal imaging dress of a kind of pixel high, high illumination, low cost
Put.
【Background technology】
Shortcoming as infrared thermal imaging camera lens generally existing used by current onboard system:Camera lens heat differential is big, high cost
Deng, it generally uses crystal germanium material and is imaged, and this material price is higher, and process non-spherical lens when can only enter
Row turnery processing, high processing costs, so as to cause infrared thermal imaging camera lens relatively costly.The thermal refractive index coefficient of this material
Very big, heat differential is big, it is necessary to using mechanical athermal, this will again improve cost.
Therefore, the utility model is based on the not enough of the above and produces.
【Utility model content】
The technical problems to be solved in the utility model is to provide a kind of pixel high, high illumination, the infrared thermal imaging of low cost
Device, the imager pixel is high, illumination is high, low cost.
In order to solve the above technical problems, the utility model employs following technical proposals：It is a kind of pixel high, high illumination, low
The infrared thermal imaging device of cost, it is characterised in that：It is disposed with from thing side to image side：
Diaphragm；
First lens, first lens are spherical lens, and first lens use chalcogenide glass material；
Second lens, second lens are non-spherical lens, and second lens use zinc sulphide material；
3rd lens, the 3rd lens are spherical lens；
Protective glass；
Sensitive chip.
Pixel high as described above, high illumination, the infrared thermal imaging device of low cost, it is characterised in that：Described first is saturating
Mirror, the 3rd lens are positive focal length lens, and second lens are negative focal length lens.
Pixel high as described above, high illumination, the infrared thermal imaging device of low cost, it is characterised in that：Described 3rd is saturating
Mirror uses chalcogenide glass material.
Pixel high as described above, high illumination, the infrared thermal imaging device of low cost, it is characterised in that：The photosensitive core
Piece is uncooled fpa detector, and its Pixel Dimensions is 17 μm of 17 μ m, and resolution ratio is 640*480, and diagonal height is
13.6mm。
Pixel high as described above, high illumination, the infrared thermal imaging device of low cost, it is characterised in that：Described second is saturating
The aspherical surface shape of mirror meets equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, and y is its unit of radial coordinate and length of lens unit phase
Together, k is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola；When k-factor is equal to -1
When, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, works as k-factor
During equal to 0, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；α1To α8Respectively
Represent the coefficient corresponding to each radial coordinate.
Compared with prior art, a kind of pixel high of the present utility model, high illumination, the infrared thermal imaging device of low cost,
Following effect is reached：
1st, existing pixel imaging lens high are generally using the aspherical and mechanical athermal method of germanium material, and this practicality is new
First lens and the 3rd lens of type use the chalcogenide glass material of low price, and the second lens are aspherical using zinc sulphide material
Mirror, the aspherical of zinc sulphide materials can carry out accurate die pressing, high in machining efficiency, with low cost；
2nd, the thermal refractive index coefficient of the chalcogenide glass that the utility model is used is 1/10th of germanium crystal material, so
Varied with temperature using the solution picture of chalcogenide glass system it is smaller, so as to realize resolving power stabilization, reduce structure complexity and into
This；
3rd, lens of the present utility model use 7.5 microns to 14 microns of wide spectrum, 1:1:1:1 design, in far infrared light wave
Section has a fabulous image sharpness, whole picture can blur-free imaging, and ZnS lens have significant modulation transfer function
Property, becomes apparent from axis information；
4th, the utility model simple structure, it is with low cost, it is adapted to popularization and application.
【Brief description of the drawings】
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is the utility model schematic diagram.
Brief description of the drawings：1st, diaphragm；2nd, the first lens；3rd, the second lens；4th, the 3rd lens；5th, protective glass；6th, photosensitive core
Piece.
【Specific embodiment】
Implementation method of the present utility model is elaborated below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of pixel high, high illumination, the infrared thermal imaging device of low cost, set successively from thing side to image side
It is equipped with：
Diaphragm 1；
First lens 2, first lens 2 are spherical lens, and first lens 2 use chalcogenide glass material；
Second lens 3, second lens 3 are non-spherical lens, and second lens 3 use zinc sulphide material；
3rd lens 4, the 3rd lens 4 are spherical lens；
Protective glass 5；
Sensitive chip 6.
First lens 2 use chalcogenide glass material, the thermal refractive index coefficient of chalcogenide glass be germanium crystal material very
One of, so being varied with temperature using the solution picture of chalcogenide glass system smaller, so as to realize resolving power stabilization, reduce structure and answer
Polygamy and cost；Second lens 3 use the non-spherical lens of zinc sulphide material, and the aspherical of zinc sulphide materials can carry out precision
Molding, it is high in machining efficiency, it is with low cost, and the lens of zinc sulphide material have significant modulation transfer function property, make into
As details becomes apparent from.
As shown in figure 1, in the present embodiment, first lens 2, the 3rd lens 4 are positive focal length lens, and described second is saturating
Mirror 3 is negative focal length lens；The focal length of the first lens 1 of rational distribution, the second lens 2 and the 3rd lens 3, and according to focal length selection
Suitable refraction materials, so as to reach efficient material adapted.
As shown in figure 1, in the present embodiment, the 3rd lens 4 use chalcogenide glass material, high in machining efficiency, cost
It is cheap.
As shown in figure 1, in the present embodiment, sensitive chip 6 is uncooled fpa detector, its Pixel Dimensions is 17 μm
× 17 μm, resolution ratio is 640*480, and diagonal height is 13.6mm.
As shown in figure 1, in the present embodiment, the aspherical surface shape of the second lens 3 meets equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, and y is its unit of radial coordinate and length of lens unit phase
Together, k is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola；When k-factor is equal to -1
When, the face shape curve of lens is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, works as k-factor
During equal to 0, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；α1To α8Respectively
Represent the coefficient corresponding to each radial coordinate.
The focal length of the first lens 1 of rational distribution, the second lens 2 and the 3rd lens 3, and according to the suitable folding of focal length selection
Rate material is penetrated, so as to reach efficient material adapted；Also, using the aspherical defect for having corrected infrared aberration；In addition,
Consider to be corrected aberration while lifting center resolving power during Optical devices designs, so that the image quality of surrounding visual field is equal
It is even.
In Optical System Design, by reducing vignetting, vignetting is not set even to ensure that edge light as much as possible is arrived
Up to sensitive chip 6, and by controlling the refraction angle of rim ray, so that reduce the loss of light, so as to reach high illumination
Requirement.
The utility model uses germanium conventional infrared thermal imaging device more using the chalcogenide glass and zinc sulphide material of low price
Material, germanium material price is higher and this aspherical of material must carry out turnery processing.Second lens of the present utility model make
With zinc sulfide non spherical surface, the aspherical of zinc sulphide materials can carry out accurate die pressing, so that processing cost reduction, improves and add
Work efficiency high, it is with low cost, it is to avoid the high cost that traditional non-spherical lens needs turnery processing and brings using germanium material is asked
Topic, so that the cost reduction of the device.
Following table is the parameter of the utility model actual design case：
As above among form, two faces of S2, S3 the first lens 2 of correspondence, two faces of S4, S5 the second lens 3 of correspondence,
Two faces of S6, S7 the 3rd lens 4 of correspondence, two faces of S8, S9 correspondence protective glass 5.
Following table is the Surface Parameters of the second lens 3：
Claims (5)
1. a kind of pixel high, high illumination, low cost infrared thermal imaging device, it is characterised in that：Set successively from thing side to image side
It is equipped with：
Diaphragm (1)；
First lens (2), first lens (2) are spherical lens, and first lens (2) use chalcogenide glass material；
Second lens (3), second lens (3) are non-spherical lens, and second lens (3) use zinc sulphide material；
3rd lens (4), the 3rd lens (4) are spherical lens；
Protective glass (5)；
Sensitive chip (6).
2. pixel high according to claim 1, high illumination, low cost infrared thermal imaging device, it is characterised in that：It is described
First lens (2), the 3rd lens (4) are positive focal length lens, and second lens (3) are negative focal length lens.
3. pixel high according to claim 1, high illumination, low cost infrared thermal imaging device, it is characterised in that：It is described
3rd lens (4) use chalcogenide glass material.
4. pixel high according to claim 1, high illumination, low cost infrared thermal imaging device, it is characterised in that：It is described
Sensitive chip (6) is uncooled fpa detector, and its Pixel Dimensions is 17 μm of 17 μ m, and resolution ratio is 640*480, diagonal
Highly it is 13.6mm.
5. pixel high according to claim 1 and 2, high illumination, low cost infrared thermal imaging device, it is characterised in that：
The aspherical surface shape of second lens (3) meets equation：
Parameter c is the curvature corresponding to radius in aforesaid equation, and its unit is identical with length of lens unit for radial coordinate for y, k
It is circular cone whose conic coefficient；When k-factor is less than -1, the face shape curve of lens is hyperbola；When k-factor is equal to -1, thoroughly
The face shape curve of mirror is parabola；When k-factor is between -1 to 0, the face shape curve of lens is ellipse, when k-factor is equal to 0
When, the face shape curve of lens is circle, and when k-factor is more than 0, the face shape curve of lens is oblateness；α1To α8Represent respectively each
Coefficient corresponding to radial coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621286698.9U CN206270583U (en) | 2016-11-28 | 2016-11-28 | A kind of pixel high, high illumination, the infrared thermal imaging device of low cost |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621286698.9U CN206270583U (en) | 2016-11-28 | 2016-11-28 | A kind of pixel high, high illumination, the infrared thermal imaging device of low cost |
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| CN206270583U true CN206270583U (en) | 2017-06-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646823A (en) * | 2016-11-28 | 2017-05-10 | 中山联合光电科技股份有限公司 | High-pixel high-illumination, low-cost infrared thermal imaging system |
| CN109367085A (en) * | 2018-11-20 | 2019-02-22 | 永橡胶有限公司 | Curing bag leak detection device and control method based on thermal imaging |
| CN109856785A (en) * | 2019-03-16 | 2019-06-07 | 南京华群光电技术有限公司 | Three-chip type LONG WAVE INFRARED tight shot |
-
2016
- 2016-11-28 CN CN201621286698.9U patent/CN206270583U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106646823A (en) * | 2016-11-28 | 2017-05-10 | 中山联合光电科技股份有限公司 | High-pixel high-illumination, low-cost infrared thermal imaging system |
| CN109367085A (en) * | 2018-11-20 | 2019-02-22 | 永橡胶有限公司 | Curing bag leak detection device and control method based on thermal imaging |
| CN109856785A (en) * | 2019-03-16 | 2019-06-07 | 南京华群光电技术有限公司 | Three-chip type LONG WAVE INFRARED tight shot |
| CN109856785B (en) * | 2019-03-16 | 2021-10-19 | 南京华群光电技术有限公司 | Three-piece type long-wave infrared fixed-focus lens |
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