CN106772941A - The big thang-kng small-sized wide-angle lens of 2.8mm - Google Patents
The big thang-kng small-sized wide-angle lens of 2.8mm Download PDFInfo
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- CN106772941A CN106772941A CN201611229546.XA CN201611229546A CN106772941A CN 106772941 A CN106772941 A CN 106772941A CN 201611229546 A CN201611229546 A CN 201611229546A CN 106772941 A CN106772941 A CN 106772941A
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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
- G02B13/0015—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
- G02B13/0045—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 five or more lenses
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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Abstract
The invention discloses a kind of big thang-kng small-sized wide-angle lens of 2.8mm, include the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens successively from the object side to the image side, first lens are convex-concave negative-power lenses, second lens are concave-concave negative-power lenses, 3rd lens are biconvex positive power lens, 4th lens are concavo-convex negative-power lenses, 5th lens are biconvex positive power lens, 6th lens are concave-concave positive power lens, and the 7th lens are biconvex positive power lens.Compared with prior art, the present invention possesses the big clear aperature of F1.4, thang-kng amount is big, camera lens compact, overall length is 22.2mm, and optical distortion is 20% or so, 1/2.7 inch of chip of size can be coordinated, visible ray with it is infrared under the conditions of reach 3,000,000 pixels and without focusing again, not empty Jiao in 30 DEG C 80 DEG C of temperature range, with temperature compensation function.
Description
Technical field
The present invention relates to lens technology field, more particularly to a kind of big thang-kng small-sized wide-angle lens of 2.8mm.
Background technology
With the development of security protection industry, the performance of monitoring camera is also more and more high-end, and the size of chip is in increase, pixel
Also increasing, the pixel more than 3,000,000 turns into main flow increasingly, therefore, the design requirement of camera lens is also being improved, so as to energy and chip
Perfect cooperation is realized, preferable monitored picture is obtained.While pixel is ensured, possess the camera lens of ultra-wide angle increasingly by joyous
Meet, its monitoring range is wide, broad view, such as, focal length is the camera lens of 2.8mm, typically belongs to wide-angle lens, be nowadays on the market
One of main flow monitoring camera, but current 2.8mm tight shots there is a problem in that：First, F numbers are not big enough, such as patent
CN 105204140 A, CN 203311085U F numbers are 1.8, and thang-kng amount is insufficient, and chip can not obtain enough light exposures；
Secondly, camera lens overall length is more long, about 30mm or so；Again, distortion is than larger, and at big visual field as matter is not ideal enough, such as specially
The A of sharp CN 105467561, optical distortion is close to 50%.
In view of this, it is a kind of small etc. with big thang-kng amount, small volume, good imaging quality, optical distortion it is necessory to provide
The big thang-kng small-sized wide-angle lens of 2.8mm of advantage.
The content of the invention
It is an object of the present invention to be directed to the above-mentioned deficiency of prior art, there is provided a kind of big thang-kng compact wide-angle mirrors of 2.8mm
Head, possesses the big clear aperature of F1.4, and thang-kng amount is big, camera lens compact, and overall length is 22.2mm, and optical distortion is 20% left
The right side, can coordinate 1/2.7 inch of chip of size, visible ray with it is infrared under the conditions of reach 3,000,000 pixels and without again right
Jiao, not empty Jiao in -30 DEG C -80 DEG C of temperature range, with temperature compensation function.
The technical scheme that is used to reach above-mentioned purpose of the present invention is：
A kind of big thang-kng small-sized wide-angle lens of 2.8mm, include successively from the object side to the image side the first lens, the second lens,
3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, first lens are convex-concave negative-power lenses,
Second lens are concave-concave negative-power lenses, and the 3rd lens are biconvex positive power lens, and the 4th lens are
Concavo-convex negative-power lenses, the 5th lens are biconvex positive power lens, and the 6th lens are that concave-concave positive light coke is saturating
Mirror, the 7th lens are biconvex positive power lens.
Preferably, between the first described lens and the second lens, between the 5th lens and the 6th lens hidden by soma
Mating plate close-fitting；Between the second described lens and the 3rd lens, between the 3rd lens and the 4th lens, the 4th lens it is saturating with the 5th
Abutted by spacer ring between mirror, between the 6th lens and the 7th lens.
Preferably, the first described lens to the focal length of the 7th lens, refractive index and radius of curvature meets following condition：
| -8.24≤f1≤-4.35 | 1.45≤n1≤1.65 | 28.45≤R1≤32.66 | 1.45≤R2≤4.65 |
| -10.25≤f2≤-7.35 | 1.43≤n2≤1.69 | -88.66≤R3≤-85.45 | 3.49≤R4≤6.66 |
| 4.25≤f3≤8.25 | 1.68≤n3≤1.95 | 8.45≤R5≤12.67 | -8.67≤R6≤-5.49 |
| -6.26≤f4≤-3.23 | 1.40≤n4≤1.66 | -5.68≤R7≤-3.45 | -9.68≤R8≤-7.49 |
| 2.74≤f5≤6.37 | 1.40≤n5≤1.75 | -6.69≤R9≤3.45 | -8.69≤R10≤-6.49 |
| -8.38≤f6≤-4.24 | 1.40≤n6≤1.76 | -9.70≤R11≤-7.45 | 3.40≤R12≤6.70 |
| 4.24≤f7≤8.39 | 1.45≤n7≤1.77 | 10.45≤R13≤12.71 | -6.71≤R14≤-3.49 |
In upper table, " f " is focal length, and " n " is refractive index, and " R " is radius of curvature, and "-" number represents that direction is negative；
Wherein, f1 to f6 corresponds respectively to the focal length of the first lens to the 7th lens；It is saturating that n1 to n6 corresponds respectively to first
Mirror to the 7th lens refractive index；R1, R3, R5, R7, R9, R11, R13 correspond respectively to being close to for the first lens to the 7th lens
The radius of curvature of the one side of object space, R2, R4, R6, R8, R10, R12, R14 correspond respectively to the remote of the first lens to the 7th lens
From the radius of curvature of the one side of object space.
Preferably, it is provided with diaphragm between the 3rd described lens and the 4th lens.
Preferably, the first described lens, the second lens, the 3rd lens and the 7th lens are glass spherical lens,
Described the 4th lens, the 5th lens and the 6th lens are plastic aspheric lens.
Preferably, the 4th described lens, the 5th lens, the focal length of the 6th lens meet following relation：
3.21<|f4/f5|<3.63；
0.75<|f5/f6|<1.03；
Wherein, f4 is the focal length of the 4th lens；F5 is the focal length of the 5th lens；F6 is the 6th lens
Focal length.
Preferably, the 4th described lens, the 5th lens, between the focal length of the 6th lens and the focal length of whole camera lens respectively
Meet following relation：
5.95<∣f4/f∣<6.34；
1.45<∣f5/f∣<1.83；
1.55<∣f6/f∣<1.93；
Wherein, f is the focal length of whole camera lens；F4 is the focal length of the 4th lens；F5 is the focal length of the 5th lens；
F6 is the focal length of the 6th lens.
Preferably, according to aspherical equation formula：
Wherein：Z is the non-spherical lens along optical axis direction at position of the height for y, away from the non-spherical lens top
Point apart from rise, c=1/R, R represent the radius of curvature at the non-spherical lens Mian Xing centers, and k represents circular cone coefficient, parameter
A, B, C, D, E, F are high order aspheric surface coefficient.
The 4th described lens meet following relation：
Preferably, according to above-mentioned aspherical equation formula, the 5th described lens meet following relation：
Preferably, according to above-mentioned aspherical equation formula, the 6th described lens meet following relation：
Compared with prior art, the big thang-kng small-sized wide-angle lens of 2.8mm of the invention have the following advantages that：
First, by reasonable employment glass, plastic lens composition, image quality is good, it is seen that luminous energy reaches 300 for the present invention
Ten thousand pixels, and cause it is infrared not again focus on the premise of can also reach 3 mega pixels, even if also can under night low-light (level)
Realize clear bright monitored picture, be capable of achieving day and night confocal function, i.e., visible ray into the case of sharply defined image without focusing
Can be to infrared light also into sharply defined image；Temperature compensation function is provided simultaneously with, can be reached and be used under -30 DEG C~+80 DEG C environment
Will not be empty burnt.
Second, the optics knot of the 4G3P that the present invention is combined using 4 glass spheric glasses with 3 plastic aspherical element eyeglasses
Structure, balances Cost And Performance, possesses the big clear aperature of F1.4, it is ensured that enough thang-kng amounts；And camera lens compact, always
A length of 22.2mm, while optical distortion is about 20%, coordinate 1/2.7 inch of chip of size visible ray with it is infrared under the conditions of
Reach 3,000,000 pixels and without focusing again.
3rd, cost of the invention is relatively low, compact conformation, reasonable in design ingenious, and market prospects are good.
Above-mentioned is the general introduction of inventive technique scheme, below in conjunction with accompanying drawing and specific embodiment, the present invention is done further
Explanation.
Brief description of the drawings
Fig. 1 is the structural representation of the present embodiment.
Specific embodiment：
In order that the purpose of the present invention and technical scheme and advantage become more apparent, make with reference to embodiments specifically
It is bright.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Embodiment 1：
The big thang-kng small-sized wide-angle lens of 2.8mm of the present embodiment, as shown in figure 1, including successively from the object side to the image side
One lens 1, the second lens 2, the 3rd lens 3, the 4th lens 4, the 5th lens 5, the 6th lens 6 and the 7th lens 7, the first lens
1 is convex-concave negative-power lenses, and the second lens 2 are concave-concave negative-power lenses, and the 3rd lens 3 are biconvex positive power lens,
4th lens 4 are concavo-convex negative-power lenses, and the 5th lens 5 are biconvex positive power lens, and the 6th lens 6 are that the positive light of concave-concave is burnt
Degree lens, the 7th lens 7 are biconvex positive power lens.
Wherein, the focal length of the first lens to the 7th lens, refractive index and radius of curvature meet following condition：
| -8.24≤f1≤-4.35 | 1.45≤n1≤1.65 | 28.45≤R1≤32.66 | 1.45≤R2≤4.65 |
| -10.25≤f2≤-7.35 | 1.43≤n2≤1.69 | -88.66≤R3≤-85.45 | 3.49≤R4≤6.66 |
| 4.25≤f3≤8.25 | 1.68≤n3≤1.95 | 8.45≤R5≤12.67 | -8.67≤R6≤-5.49 |
| -6.26≤f4≤-3.23 | 1.40≤n4≤1.66 | -5.68≤R7≤-3.45 | -9.68≤R8≤-7.49 |
| 2.74≤f5≤6.37 | 1.40≤n5≤1.75 | -6.69≤R9≤3.45 | -8.69≤R10≤-6.49 |
| -8.38≤f6≤-4.24 | 1.40≤n6≤1.76 | -9.70≤R11≤-7.45 | 3.40≤R12≤6.70 |
| 4.24≤f7≤8.39 | 1.45≤n7≤1.77 | 10.45≤R13≤12.71 | -6.71≤R14≤-3.49 |
In upper table, " f " is focal length, and " n " is refractive index, and " R " is radius of curvature, and "-" number represents that direction is negative；
Wherein, f1 to f6 corresponds respectively to the focal length of the first lens to the 7th lens；It is saturating that n1 to n6 corresponds respectively to first
Mirror to the 7th lens refractive index；R1, R3, R5, R7, R9, R11, R13 correspond respectively to being close to for the first lens to the 7th lens
The radius of curvature of the one side of object space, R2, R4, R6, R8, R10, R12, R14 correspond respectively to the remote of the first lens to the 7th lens
From the radius of curvature of the one side of object space.
Pass through soma anti-dazzling screen close-fittings between first lens 1 and the second lens 2, between the 5th lens 5 and the 6th lens 6；
Between second lens 2 and the 3rd lens 3, between the 3rd lens 3 and the 4th lens 4, between the 4th lens 4 and the 5th lens 5,
Abutted by spacer ring between six lens 6 and the 7th lens 7；Diaphragm 8 is provided between 3rd lens 3 and the 4th lens 4；First is saturating
Mirror 1, the second lens 2, the 3rd lens 3 and the 7th lens 7 are glass spherical lens, the 4th lens 4, the 5th lens 5 and
6th lens 6 are plastic aspheric lens.
In order to reach miniaturization, high performance purpose, and in order that high/low temperature is confocal, wherein, the 4th lens the 4, the 5th are saturating
Meet following relation between mirror 5, the focal length of the 6th lens 6：
3.21<|f4/f5|<3.63；0.75<|f5/f6|<1.03；Wherein, f4 is the focal length of the 4th lens；F5 is the 5th
The focal length of lens；F6 is the focal length of the 6th lens.
Meanwhile, the 4th lens 4, the 5th lens 5, meet respectively between the focal length of the 6th lens 6 and the focal length of whole camera lens
Following relation：
5.95<∣f4/f∣<6.34；1.45<∣f5/f∣<1.83；1.55<∣f6/f∣<1.93；Wherein, f is whole camera lens
Focal length；F4 is the focal length of the 4th lens；F5 is the focal length of the 5th lens；F6 is the focal length of the 6th lens.
According to aspherical equation formula：
Wherein：Z is the non-spherical lens along optical axis direction at position of the height for y, away from the non-spherical lens top
Point apart from rise, c=1/R, R represent the radius of curvature at the non-spherical lens Mian Xing centers, and k represents circular cone coefficient, parameter
A, B, C, D, E, F are high order aspheric surface coefficient.
4th lens meet following relation：
According to above-mentioned aspherical equation formula, the 5th lens meet following relation：
According to above-mentioned aspherical equation formula, the 6th lens meet following relation：
The focal length f of the low distortion tight shot of small-sized ultra-wide angle of the invention is 2.8mm, and aperture FNO is 1.4, angle of visual field FOV
It is 130 °, optics overall length TTL is 22mm, the chip that pixel separation is 2.2 μm can be supported, edge relative illumination is 50%, specifically
Ground, totally ten four the face types in face, radius of curvature, lens thickness, eyeglass spacing, lens index and k values are full respectively for seven lens
It is enough to lower condition：
Table 1：The physical parameter of seven lens is as follows：
The big thang-kng small-sized wide-angle lens of 2.8mm of the invention have the following advantages that：
First, by reasonable employment glass, plastic lens composition, image quality is good, it is seen that luminous energy reaches 300 for the present invention
Ten thousand pixels, and cause it is infrared not again focus on the premise of can also reach 3 mega pixels, even if also can under night low-light (level)
Realize clear bright monitored picture, be capable of achieving day and night confocal function, i.e., visible ray into the case of sharply defined image without focusing
Can be to infrared light also into sharply defined image；Temperature compensation function is provided simultaneously with, can be reached and be used under -30 DEG C~+80 DEG C environment
Will not be empty burnt.
Second, the optics knot of the 4G3P that the present invention is combined using 4 glass spheric glasses with 3 plastic aspherical element eyeglasses
Structure, balances Cost And Performance, possesses the big clear aperature of F1.4, it is ensured that enough thang-kng amounts；And camera lens compact, always
A length of 22.2mm, while optical distortion is about 20%, coordinate 1/2.7 inch of chip of size visible ray with it is infrared under the conditions of
Reach 3,000,000 pixels and without focusing again.
3rd, cost of the invention is relatively low, compact conformation, reasonable in design ingenious, and market prospects are good.
The announcement and teaching of book according to the above description, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and changed.Therefore, the invention is not limited in specific embodiment disclosed and described above, to the one of invention
A little modifications and changes should also be as falling into scope of the claims of the invention.
Claims (10)
1. a kind of big thang-kng small-sized wide-angle lens of 2.8mm, include the first lens, the second lens, successively from the object side to the image side
Three lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens, it is characterised in that first lens are that convex-concave bears light
Power lenses, second lens are concave-concave negative-power lenses, and the 3rd lens are biconvex positive power lens, described the
Four lens be concavo-convex negative-power lenses, the 5th lens be biconvex positive power lens, the 6th lens be concave-concave just
Power lenses, the 7th lens are biconvex positive power lens.
2. big thang-kng small-sized wide-angle lens of 2.8mm as claimed in claim 1, it is characterised in that the first described lens and
By soma anti-dazzling screen close-fittings between two lens, between the 5th lens and the 6th lens, second lens and the 3rd lens it
Between, pass through between the 3rd lens and the 4th lens, between the 4th lens and the 5th lens, between the 6th lens and the 7th lens
Spacer ring is abutted.
3. big thang-kng small-sized wide-angle lens of 2.8mm as claimed in claim 1, it is characterised in that the first described lens to
The focal length of seven lens, refractive index and radius of curvature meet following condition：
In upper table, " f " is focal length, and " n " is refractive index, and " R " is radius of curvature, and "-" number represents that direction is negative；
Wherein, f1 to f6 corresponds respectively to the focal length of the first lens to the 7th lens；N1 to n6 corresponds respectively to the first lens extremely
The refractive index of the 7th lens；R1, R3, R5, R7, R9, R11, R13 correspond respectively to the close object space of the first lens to the 7th lens
One side radius of curvature, R2, R4, R6, R8, R10, R12, R14 correspond respectively to the first lens to the 7th lens away from thing
The radius of curvature of the one side of side.
4. big thang-kng small-sized wide-angle lens of 2.8mm as claimed in claim 1, it is characterised in that the 3rd described lens and
Diaphragm is provided between four lens.
5. big thang-kng small-sized wide-angle lens of 2.8mm as claimed in claim 1, it is characterised in that described the first lens, second
Lens, the 3rd lens and the 7th lens are glass spherical lens, described the 4th lens, the 5th lens and the 6th lens
It is plastic aspheric lens.
6. big thang-kng small-sized wide-angle lens of 2.8mm as claimed in claim 1, it is characterised in that described the 4th lens, the 5th
Lens, the focal length of the 6th lens meet following relation：
3.21<|f4/f5|<3.63；
0.75<|f5/f6|<1.03；
Wherein, f4 is the focal length of the 4th lens；F5 is the focal length of the 5th lens；F6 is Jiao of the 6th lens
Away from.
7. big thang-kng small-sized wide-angle lens of 2.8mm as claimed in claim 1, it is characterised in that described the 4th lens, the 5th
Following relation is met respectively between lens, the focal length of the 6th lens and the focal length of whole camera lens：
5.95<∣f4/f∣<6.34；
1.45<∣f5/f∣<1.83；
1.55<∣f6/f∣<1.93；
Wherein, f is the focal length of whole camera lens；F4 is the focal length of the 4th lens；F5 is the focal length of the 5th lens；F6 is
The focal length of the 6th lens.
8. big thang-kng small-sized wide-angle lens of 2.8mm as claimed in claim 1, it is characterised in that according to aspherical equation formula：
Wherein：Z is the non-spherical lens along optical axis direction at position of the height for y, away from the non-spherical lens summit
Apart from rise, c=1/R, R represent the radius of curvature at the non-spherical lens Mian Xing centers, and k represents circular cone coefficient, parameter A, B,
C, D, E, F are high order aspheric surface coefficient.
The 4th described lens meet following relation：
9. big thang-kng small-sized wide-angle lens of 2.8mm as claimed in claim 8, it is characterised in that according to non-in claim 8
Spherical equation formula, the 5th described lens meet following relation：
10. big thang-kng small-sized wide-angle lens of 2.8mm as claimed in claim 8, it is characterised in that according in claim 8
Aspherical equation formula, the 6th described lens meet following relation：
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| CN201611229546.XA CN106772941A (en) | 2016-12-27 | 2016-12-27 | The big thang-kng small-sized wide-angle lens of 2.8mm |
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Cited By (11)
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| CN107526155A (en) * | 2017-08-31 | 2017-12-29 | 舜宇光学(中山)有限公司 | Glass modeling mixing tight shot |
| CN108627949A (en) * | 2017-03-15 | 2018-10-09 | 佳能企业股份有限公司 | Optical lens |
| CN108761733A (en) * | 2018-07-03 | 2018-11-06 | 中山联合光电科技股份有限公司 | Large aperture, high pixel, high/low temperature be confocal, double light path optical system |
| CN109799600A (en) * | 2019-03-26 | 2019-05-24 | 东莞市宇瞳光学科技股份有限公司 | A kind of confocal tight shot |
| WO2019144382A1 (en) * | 2018-01-26 | 2019-08-01 | 深圳市大疆创新科技有限公司 | Wide-angle lens, imaging device, and unmanned aerial vehicle |
| CN110456480A (en) * | 2019-08-02 | 2019-11-15 | 佛山科学技术学院 | It is a kind of to minimize high pixel panorama day and night confocal optical system |
| CN111566536A (en) * | 2017-12-29 | 2020-08-21 | 三星电子株式会社 | Optical lens assembly and electronic device including the same |
| CN111708145A (en) * | 2020-06-12 | 2020-09-25 | 湖南长步道光学科技有限公司 | Video optical system and lens |
| WO2021128123A1 (en) * | 2019-12-26 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Camera optical lens |
| WO2021128149A1 (en) * | 2019-12-26 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Photographic optical lens |
| CN113109923A (en) * | 2021-04-01 | 2021-07-13 | 南阳利达光电有限公司 | Large-aperture high-definition vehicle-mounted lens |
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| CN205157867U (en) * | 2015-10-28 | 2016-04-13 | 东莞市宇瞳光学科技股份有限公司 | High definition super wide angle tight shot |
| CN206505215U (en) * | 2016-12-27 | 2017-09-19 | 东莞市宇瞳光学科技股份有限公司 | The big thang-kng small-sized wide-angle lens of 2.8mm |
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