CN209640588U - A kind of infrared confocal wide-angle lens device - Google Patents
A kind of infrared confocal wide-angle lens device Download PDFInfo
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- CN209640588U CN209640588U CN201920661663.6U CN201920661663U CN209640588U CN 209640588 U CN209640588 U CN 209640588U CN 201920661663 U CN201920661663 U CN 201920661663U CN 209640588 U CN209640588 U CN 209640588U
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Abstract
The utility model discloses a kind of infrared confocal wide-angle lens devices, are successively arranged from object side to image side: front lens group, diaphragm, rear lens group, optical filter, protection glass and sensitive chip；The focal power of front lens group is negative, and includes: the first lens, focal power are negative, and the one side towards object side is convex surface, and the one side towards image side is concave surface；Second lens, focal power are negative, and two faces are concave surface；The third lens, focal power are positive, and two faces are convex surface；The focal power of rear lens group is positive, and includes: the 4th lens, focal power are negative, and the one side towards object side is convex surface, and the one side towards image side is concave surface；5th lens, focal power are positive, and two faces are convex surface；6th lens, focal power are positive, and two faces are convex surface；7th lens, focal power are negative, and two faces are concave surface；8th lens, focal power are positive, and two faces are convex surface.Each lens of the utility model use concave, convex composite structure, can preferably realize infrared confocal.
Description
[technical field]
The utility model relates to optical lens technology fields, more particularly to a kind of infrared confocal wide-angle lens device.
[background technique]
Monitoring trade proposes new use demand to wide-angle tight shot used at present, that is, needs to meet infrared total
Coke, while to realize large aperture, big target surface, high definition imaging requirements when meeting day and night and poor lighting condition are existing
The camera lens for being able to achieve the requirement used greater number of glass lens substantially, or even also use Glass aspheric, increase
While weight, cost is also added, is unfavorable for promoting the use of.
Therefore, the utility model is based on above deficiency and generates.
[utility model content]
The utility model aim is to overcome the deficiencies in the prior art, provides a kind of infrared confocal wide-angle lens device.
In order to solve the above technical problems, the utility model uses following technical proposals: a kind of infrared confocal wide-angle lens
Device, which is characterized in that be successively arranged from object side to image side: front lens group, diaphragm, rear lens group, optical filter, protection glass and
Sensitive chip；
The focal power of the front lens group is negative, and the front lens group includes:
First lens, first power of lens are negative, and the one side of the first lens towards object side is convex surface, towards picture
The one side of side is concave surface；
Second lens, second power of lens are negative, and two faces of the second lens are concave surface；
The focal power of the third lens, the third lens is positive, and two faces of the third lens are convex surface；
The focal power of the rear lens group is positive, and the rear lens group includes:
4th lens, the 4th power of lens are negative, and the one side of the 4th lens towards object side is convex surface, towards picture
The one side of side is concave surface；
5th lens, the 5th power of lens are positive, and two faces of the 5th lens are convex surface；
6th lens, the 6th power of lens are positive, and two faces of the 6th lens are convex surface；
7th lens, the 7th power of lens are negative, and two faces of the 7th lens are concave surface；
8th lens, the 8th power of lens are positive, and two faces of the 8th lens are convex surface.
A kind of infrared confocal wide-angle lens device as described above, which is characterized in that the front lens group meets following
Relational expression:
-10≤fBefore/f≤-3；
Wherein, fBeforeFor the combined focal length of front lens group, f is the focal length of infrared confocal wide-angle lens.
A kind of infrared confocal wide-angle lens device as described above, which is characterized in that the rear lens group meets following
Relational expression:
1.5≤fAfterwards/f≤2.5；
Wherein, fAfterwardsFor the combined focal length of rear lens group, f is the focal length of infrared confocal wide-angle lens.
A kind of infrared confocal wide-angle lens device as described above, which is characterized in that first lens meet following
Relational expression:
Nd1≤1.6；
Wherein, Nd1For the refractive index of the first lens.
A kind of infrared confocal wide-angle lens device as described above, which is characterized in that each lens meet following relationship:
Vd1> 50；Vd2> 50；Vd3< 30；
Vd4< 40；Vd5> 60；Vd6> 50；Vd7< 40；Vd8> 50；
Wherein, Vd1For the Abbe number of the first lens, Vd2For the Abbe number of the second lens, Vd3For the Abbe of the third lens
Number, Vd4For the Abbe number of the 4th lens, Vd5For the Abbe number of the 5th lens, Vd6For the Abbe number of the 6th lens, Vd7It is the 7th
The Abbe number of lens, Vd8For the Abbe number of the 8th lens.
A kind of infrared confocal wide-angle lens device as described above, which is characterized in that first lens and second are thoroughly
Mirror meets following relationship:
-3≤f1/f≤-1；
-1.5≤f2/f≤-0.5；
Wherein, f1For the focal length of the first lens, f2For the focal length of the second lens, f is the focal length of infrared confocal wide-angle lens.
A kind of infrared confocal wide-angle lens device as described above, which is characterized in that diaphragm is located at the third lens and the 4th
Between lens.
Infrared confocal wide-angle lens device as described above a kind of, which is characterized in that first lens, second are thoroughly
Mirror, the third lens, the 6th lens, the 7th lens and the 8th lens are plastic aspheric lenes, the 4th lens and the 5th lens
For glass spherical lens.
Compared with prior art, the infrared confocal wide-angle lens device of one kind of the utility model achieving the following effects:
1, the concave, convex composite structure that each lens of the utility model use is different by reasonably distributing focal power and selection
The big target surface of the wide-angle optics, low cost, the target of low weight may be implemented in the glass material of abbe number, and can be preferably
Realize infrared confocal in ground.
2, the utility model is preposition by diaphragm, and control front end bore is conducive to while further decreasing weight and cost
Realize the requirement of large aperture.
3, the wide-angle lens of the utility model has the characteristics that infrared confocal, large aperture, big target surface, low cost, low weight,
It is suitble to promote and apply.
[Detailed description of the invention]
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the overfocus curve graph in the utility model embodiment in visible waveband；
Fig. 3 is the overfocus curve graph in the utility model embodiment in infrared band.
[specific embodiment]
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, a kind of infrared confocal wide-angle lens device, is successively arranged: front lens group, diaphragm from object side to image side
4, rear lens group, optical filter 10, protection glass 11 and sensitive chip 12；
The focal power of the front lens group is negative, and the front lens group includes:
The focal power of first lens 1, first lens 1 is negative, and the one side of the first lens 1 towards object side is convex surface, court
It is concave surface to the one side of image side；
The focal power of second lens 2, second lens 2 is negative, and two faces of the second lens 2 are concave surface；
The focal power of the third lens 3, the third lens 3 is positive, and two faces of the third lens 3 are convex surface；
The focal power of the rear lens group is positive, and the rear lens group includes:
The focal power of 4th lens 5, the 4th lens 5 is negative, and the one side of the 4th lens 5 towards object side is convex surface, court
It is concave surface to the one side of image side；
The focal power of 5th lens 6, the 5th lens 6 is positive, and two faces of the 5th lens 6 are convex surface；
The focal power of 6th lens 7, the 6th lens 7 is positive, and two faces of the 6th lens 7 are convex surface；
The focal power of 7th lens 8, the 7th lens 8 is negative, and two faces of the 7th lens 8 are concave surface；
The focal power of 8th lens 9, the 8th lens 9 is positive, and two faces of the 8th lens 9 are convex surface.
As shown in Figure 1, in the present embodiment, the front lens group meets following relationship:
-10≤fBefore/f≤-3；
Wherein, fBeforeFor the combined focal length of front lens group, f is the focal length of infrared confocal wide-angle lens.
As shown in Figure 1, in the present embodiment, the rear lens group meets following relationship:
1.5≤fAfterwards/f≤2.5；
Wherein, fAfterwardsFor the combined focal length of rear lens group, f is the focal length of infrared confocal wide-angle lens.
In the present embodiment, the focal power of the front lens group of camera lens, rear lens group is conducive to reasonable allocation proportion
The incident ray height of front lens group is controlled, reduces leading portion bore, to reduce weight；Further, lesser bore can drop
The production difficulty of low plastic lens improves output yields, to reduce cost；In addition, the reasonable focal power distribution of front and back group,
While guaranteeing illuminance of image plane, image planes can be increased as far as possible, realize the target of big target surface.
As shown in Figure 1, in the present embodiment, first lens 1 meet following relationship:
Nd1≤1.6；
Wherein, Nd1For the refractive index of the first lens 1.
In the present embodiment, the first lens 1 have used the material compared with low-refraction, are avoided that incident light by the first lens
After 1, the angle of divergence is excessive and causes rear group of aperture of lens excessive, is advantageously implemented large aperture.
As shown in Figure 1, in the present embodiment, each lens meet following relationship:
Vd1> 50；Vd2> 50；Vd3< 30；
Vd4< 40；Vd5> 60；Vd6> 50；Vd7< 40；Vd8> 50；
Wherein, Vd1For the Abbe number of the first lens 1, Vd2For the Abbe number of the second lens 2, Vd3For the third lens 3 Ah
Shellfish number, Vd4For the Abbe number of the 4th lens 5, Vd5For the Abbe number of the 5th lens 6, Vd6For the Abbe number of the 6th lens 7, Vd7
For the Abbe number of the 7th lens 8, Vd8For the Abbe number of the 8th lens 9.
In the present embodiment, the Abbe constant collocation of each lens rationally, is advantageously implemented each eyeglass light focus in optical system
Degree compensation mutually, automatically corrects the color difference between visible waveband and infrared band, realizes infrared confocal.
As shown in Figure 1, in the present embodiment, first lens 1 and the second lens 2 meet following relationship:
-3≤f1/f≤-1；
-1.5≤f2/f≤-0.5；
Wherein, f1For the focal length of the first lens 1, f2For the focal length of the second lens 2, f is the coke of infrared confocal wide-angle lens
Away from.
In the present embodiment, the first lens 1 and the second lens 2 undertake preceding group of negative power simultaneously, so that the first lens 1
It is reasonably balanced between caliber size and aberration distribution, while improving imaging definition, reduces eyeglass production difficulty,
To reduce cost.
As shown in Figure 1, in the present embodiment, diaphragm 4 is between the third lens 3 and the 4th lens 5.
In the present embodiment, diaphragm is preposition between the third lens 3 and the 4th lens 5, so that diaphragm is in close to mirror
The position of head front end, on the one hand can effectively reduce preceding group of caliber size, reduce the weight of camera lens；On the other hand, be conducive to increase
Big FNO numerical value realizes large aperture, and the FNO value of system is 1.6 in the present embodiment.
As shown in Figure 1, in the present embodiment, the first lens 1, the second lens 2, the third lens 3, the 6th lens the 7, the 7th are thoroughly
Mirror 8, the 8th lens 9 are plastic aspheric lenes, and the 4th lens 5 and the 5th lens 6 are glass spherical lens.
In the present embodiment, more aspherical lens are conducive to various aberrations in correction system, guarantee imaging definition
While, advantageously reduce the weight of whole system；Further, since plastic cement aspherical lens can be realized in batches compared in short cycle
Production, and cheap therefore significant reduce costs.4th lens 5 and the 5th lens 6 use glass material, due to glass
Glass material it is many kinds of, convenient for selecting the material with suitable dispersion parameters to match, to reduce color difference, realize infrared confocal.
In the present embodiment, the focal length f=5.84mm of infrared confocal wide-angle lens, relative aperture FNO=1.6, field angle FOV
=140 °, camera lens overall length is TTL=46.78mm, and image planes are greater than Φ 13.4mm, can allow for 1/1.2 inch of sensitive chip；It is real
Applying visible waveband used in example is 435~656nm, and infrared band is 810~890nm, each lens items design parameter such as following table
It is shown:
| Face number | Radius R | Thickness | Refractive index Nd | Abbe number Vd |
| Object side | Infinity | Infinity | - | - |
| *S1 | 43.256 | 0.8 | 1.535 | 55.634 |
| *S2 | 5.626 | 5.824 | - | - |
| *S3 | -9.051 | 2.914 | 1.535 | 55.634 |
| *S4 | 134.826 | 0.583 | - | - |
| *S5 | 13.219 | 5.006 | 1.614 | 25.575 |
| *S6 | -35.477 | 4.422 | - | - |
| Diaphragm | Infinity | 0.106 | - | - |
| S7 | 109.683 | 2.11 | 1.648 | 33.842 |
| S8 | 8.492 | 4.31 | 1.593 | 68.525 |
| S9 | -14.564 | 0.1 | - | - |
| *S10 | 14.405 | 3.388 | 1.535 | 55.634 |
| *S11 | -15.303 | 0.223 | - | - |
| *S12 | -9.479 | 1.504 | 1.582 | 30.182 |
| *S13 | 21.02 | 1.293 | - | - |
| *S14 | 9.271 | 4.471 | 1.535 | 55.634 |
| *S15 | -48.383 | 4 | - | - |
| S16 | Infinity | 0.3 | 1.517 | 64.212 |
| S17 | Infinity | 4.927 | - | - |
| S18 | Infinity | 0.4 | 1.517 | 64.212 |
| S19 | Infinity | 0.1 | - | - |
| Image side | Infinity | - | - | - |
In upper table, the unit of radius R and thickness is millimeter.Marking the face of " * " indicates aspherical, aspherical lens
Face type meet following relationship:
In formula, parameter c is curvature corresponding to lens radius, and y is radial coordinate, the unit and length of lens of radial coordinate
Unit is identical, and 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 etc.
When -1, 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
When coefficient is equal to 0, the face shape curve of lens is circle, and when k-factor is greater than 0, the face shape curve of lens is oblateness；a1To a8
Coefficient corresponding to each radial coordinate is respectively indicated, detailed aspherical relevant parameter is as shown in the table:
| k | a1 | a2 | a3 | a4 | |
| *S1 | -77.46666 | 0 | 7.0552283e-005 | -1.30806e-006 | 1.5043384e-008 |
| *S2 | -0.4772695 | 0 | -1.7989961e-005 | 2.3853375e-006 | -7.2615383e-008 |
| *S3 | -0.3587377 | 0 | 0.0002770389 | -2.9459762e-007 | 7.6015428e-009 |
| *S4 | 289.2742 | 0 | 8.6820316e-005 | 1.1798161e-005 | -4.242408e-008 |
| *S5 | -8.12949 | 0 | 0.00032364986 | 3.574364e-006 | 1.8832373e-009 |
| *S6 | -9.355479 | 0 | 0.00018725708 | 4.807541e-007 | 5.5832594e-008 |
| *S10 | -2.890359 | 0 | 2.0051772e-005 | 4.2584068e-008 | -3.7121849e-008 |
| *S11 | -4.387583 | 0 | -5.4787027e-005 | 1.011475e-006 | -1.1028842e-008 |
| *S12 | -9.386578 | 0 | -9.3975199e-006 | 5.5689916e-007 | 2.7535448e-009 |
| *S13 | -3.165624 | 0 | -4.8116197e-006 | -2.1350482e-006 | -1.4084821e-008 |
| *S14 | -7.766724 | 0 | 6.14948e-005 | -2.7010261e-006 | 4.1412767e-008 |
| *S15 | -86.44504 | 0 | -5.9410142e-005 | 1.610137e-006 | 1.6836136e-010 |
Continued:
| a5 | a6 | a7 | a8 | |
| *S1 | -6.1110188e-011 | -3.9380787e-014 | 5.1756606e-016 | 2.8586555e-018 |
| *S2 | -1.3468175e-009 | 2.9947231e-011 | 5.8160574e-013 | -1.8214596e-014 |
| *S3 | 2.9116867e-010 | -2.4065253e-012 | -3.6994941e-014 | 3.8039039e-016 |
| *S4 | -2.2738716e-009 | 5.7609549e-011 | 2.376425e-013 | -3.2579809e-015 |
| *S5 | -4.3967788e-010 | -4.2577692e-012 | 1.8383839e-013 | 4.0281402e-015 |
| *S6 | 2.2506359e-009 | -1.05067e-010 | 2.8491924e-014 | 4.8629136e-014 |
| *S10 | -1.4944804e-010 | 1.0872422e-012 | 4.915316e-014 | -2.8316619e-016 |
| *S11 | -2.3525416e-010 | 6.8706175e-012 | 3.8510717e-014 | -3.2121257e-016 |
| *S12 | 3.3732138e-010 | -1.2338124e-012 | -5.9345627e-014 | 1.7246188e-015 |
| *S13 | 1.7410244e-010 | -1.9546342e-012 | -3.7890563e-014 | 8.875991e-016 |
| *S14 | 1.4866787e-010 | 6.7023406e-012 | 6.8681469e-014 | -1.7437516e-015 |
| *S15 | 1.1121825e-009 | -7.886522e-012 | 8.733298e-014 | 3.3659366e-015 |
Fig. 2, Fig. 3 are the defocusing curve figure of the infrared confocal wide-angle lens in this embodiment scheme, for indicating optical system
For system before and after optimum image plane position, corresponding resolving power situation of change when changing with back focal length degree, Fig. 2 curve is visible waveband
Design result, Fig. 3 curve is the design result of infrared band, from curve as can be seen that optimum image plane position under both of which
7um is differed, illustrates that infrared visible confocal degree is preferable, is switched to infrared optical mode from visible mode, without re-starting pair
Coke can be obtained picture high-definition.
Embodiment described in the utility model is only the description carried out to preferred embodiments of the present invention, not
Utility model conception and scope is defined, under the premise of not departing from the design concept of the utility model, engineering in this field
The all variations and modifications that technical staff makes the technical solution of the utility model should all fall into the protection model of the utility model
It encloses.
Claims (8)
1. a kind of infrared confocal wide-angle lens device, which is characterized in that be successively arranged from object side to image side: front lens group, diaphragm
(4), rear lens group, optical filter (10), protection glass (11) and sensitive chip (12)；
The focal power of the front lens group is negative, and the front lens group includes:
The focal power of first lens (1), first lens (1) is negative, and the one side of the first lens (1) towards object side is convex surface,
One side towards image side is concave surface；
The focal power of second lens (2), second lens (2) is negative, and two faces of the second lens (2) are concave surface；
The focal power of the third lens (3), the third lens (3) is positive, and two faces of the third lens (3) are convex surface；
The focal power of the rear lens group is positive, and the rear lens group includes:
The focal power of 4th lens (5), the 4th lens (5) is negative, and the one side of the 4th lens (5) towards object side is convex surface,
One side towards image side is concave surface；
The focal power of 5th lens (6), the 5th lens (6) is positive, and two faces of the 5th lens (6) are convex surface；
The focal power of 6th lens (7), the 6th lens (7) is positive, and two faces of the 6th lens (7) are convex surface；
The focal power of 7th lens (8), the 7th lens (8) is negative, and two faces of the 7th lens (8) are concave surface；
The focal power of 8th lens (9), the 8th lens (9) is positive, and two faces of the 8th lens (9) are convex surface.
2. the infrared confocal wide-angle lens device of one kind according to claim 1, which is characterized in that the front lens group is full
Sufficient following relationship:
-10≤fBefore/f≤-3；
Wherein, fBeforeFor the combined focal length of front lens group, f is the focal length of infrared confocal wide-angle lens.
3. the infrared confocal wide-angle lens device of one kind according to claim 1, which is characterized in that the rear lens group is full
Sufficient following relationship:
1.5≤fAfterwards/f≤2.5；
Wherein, fAfterwardsFor the combined focal length of rear lens group, f is the focal length of infrared confocal wide-angle lens.
4. the infrared confocal wide-angle lens device of one kind according to claim 1, which is characterized in that first lens
(1) meet following relationship:
Nd1≤1.6；
Wherein, Nd1For the refractive index of the first lens (1).
5. the infrared confocal wide-angle lens device of one kind according to claim 1, which is characterized in that each lens meet with ShiShimonoseki
It is formula:
Vd1> 50；Vd2> 50；Vd3< 30；
Vd4< 40；Vd5> 60；Vd6> 50；Vd7< 40；Vd8> 50；
Wherein, Vd1For the Abbe number of the first lens (1), Vd2For the Abbe number of the second lens (2), Vd3For the third lens (3)
Abbe number, Vd4For the Abbe number of the 4th lens (5), Vd5For the Abbe number of the 5th lens (6), Vd6For the 6th lens (7) Ah
Shellfish number, Vd7For the Abbe number of the 7th lens (8), Vd8For the Abbe number of the 8th lens (9).
6. the infrared confocal wide-angle lens device of one kind according to claim 1, which is characterized in that first lens
(1) and the second lens (2) meet following relationship:
-3≤f1/f≤-1；
-1.5≤f2/f≤-0.5；
Wherein, f1For the focal length of the first lens (1), f2For the focal length of the second lens (2), f is the coke of infrared confocal wide-angle lens
Away from.
7. the infrared confocal wide-angle lens device of one kind according to claim 1, which is characterized in that diaphragm (4) is located at third
Between lens (3) and the 4th lens (5).
8. the infrared confocal wide-angle lens device of one kind according to claim 1, which is characterized in that first lens
(1), the second lens (2), the third lens (3), the 6th lens (7), the 7th lens (8) and the 8th lens (9) are plastic cement aspheric
Face lens, the 4th lens (5) and the 5th lens (6) are glass spherical lens.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221401A (en) * | 2019-05-08 | 2019-09-10 | 中山联合光电科技股份有限公司 | A kind of infrared confocal wide-angle lens |
| CN111367061A (en) * | 2020-05-28 | 2020-07-03 | 江西联创电子有限公司 | Optical imaging lens and imaging apparatus |
| CN111929816A (en) * | 2020-08-20 | 2020-11-13 | 湖南长步道光学科技有限公司 | High-definition aerial photography optical system and lens |
| CN113419327A (en) * | 2021-05-17 | 2021-09-21 | 南京信息工程大学 | Near-infrared wide-angle lens |
| CN113759498A (en) * | 2020-06-02 | 2021-12-07 | 华为技术有限公司 | Optical lens and optical system |
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2019
- 2019-05-08 CN CN201920661663.6U patent/CN209640588U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221401A (en) * | 2019-05-08 | 2019-09-10 | 中山联合光电科技股份有限公司 | A kind of infrared confocal wide-angle lens |
| CN110221401B (en) * | 2019-05-08 | 2024-06-11 | 中山联合光电科技股份有限公司 | Infrared confocal wide-angle lens |
| CN111367061A (en) * | 2020-05-28 | 2020-07-03 | 江西联创电子有限公司 | Optical imaging lens and imaging apparatus |
| CN111367061B (en) * | 2020-05-28 | 2020-09-04 | 江西联创电子有限公司 | Optical imaging lens and imaging apparatus |
| CN113759498A (en) * | 2020-06-02 | 2021-12-07 | 华为技术有限公司 | Optical lens and optical system |
| CN111929816A (en) * | 2020-08-20 | 2020-11-13 | 湖南长步道光学科技有限公司 | High-definition aerial photography optical system and lens |
| CN113419327A (en) * | 2021-05-17 | 2021-09-21 | 南京信息工程大学 | Near-infrared wide-angle lens |
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