CN110031953A - A kind of optical imaging lens - Google Patents
A kind of optical imaging lens Download PDFInfo
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- CN110031953A CN110031953A CN201910383375.3A CN201910383375A CN110031953A CN 110031953 A CN110031953 A CN 110031953A CN 201910383375 A CN201910383375 A CN 201910383375A CN 110031953 A CN110031953 A CN 110031953A
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- 238000012634 optical imaging Methods 0.000 title claims abstract description 33
- 230000003287 optical effect Effects 0.000 claims abstract description 30
- 238000003384 imaging method Methods 0.000 claims description 26
- 239000011521 glass Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 16
- 230000004075 alteration Effects 0.000 description 13
- 230000000694 effects Effects 0.000 description 5
- 230000002596 correlated effect Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000004304 visual acuity Effects 0.000 description 4
- 230000004438 eyesight Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
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- 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
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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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Abstract
The present invention relates to lens technology fields, a kind of particularly optical imaging lens, the invention discloses a kind of optical imaging lens, along an optical axis successively include the first lens, the second lens, diaphragm, the third lens, the 4th lens and the 5th lens from object side to image side；First lens are the concave-convex lens for having negative refractive index；Second lens are the convex-convex lens for having positive refractive index；The third lens are the concave-convex lens for having positive refractive index；4th lens are the convex-convex lens for having positive refractive index；5th lens are the concavo-concave lens for having negative refractive index；4th lens and the 5th lens are mutually glued.The present invention has the advantages that big light passing, low distortion, high resolution, slimming and low cost.
Description
Technical field
The invention belongs to lens technology fields, more particularly to a kind of optical imaging lens.
Background technique
With the continuous progress of technology, in recent years, optical imaging lens are also grown rapidly, and are widely used in intelligence
The every field such as mobile phone, tablet computer, video conference, safety monitoring, vehicle-mounted monitoring, therefore, for wanting for optical imaging lens
Ask also higher and higher, but the overall length of DMS (driver's monitoring system) monitoring camera currently on the market is longer, aperture is smaller, at
Picture effect is darker, and the optical distortion of system is larger, and imaging distortion is serious；Nearly object distance using when optical transfer function manage wait mention
Height, resolution are low；And it is only applicable to more than 800 nanometers of near infrared light, when imaging, can reflect the near infrared light of LED light, shadow
Ring Driver Vision.
Summary of the invention
The purpose of the present invention is to provide a kind of optical imaging lens to solve above-mentioned technical problem.
To achieve the above object, the technical solution adopted by the present invention are as follows: a kind of optical imaging lens, from object side to image side edge
One optical axis successively includes the first lens, the second lens, diaphragm, the third lens, the 4th lens and the 5th lens；First lens are extremely
5th lens respectively include one towards object side and the object side for passing through imaging ray and one towards image side and make imaging ray
By image side surface；
First lens have negative refractive index, and the object side of first lens is concave surface, and the image side surface of first lens is convex
Face；
Second lens have positive refractive index, and the object side of second lens is convex surface, and the image side surface of second lens is convex
Face；
The third lens have positive refractive index, and the object side of the third lens is concave surface, and the image side surface of the third lens is convex
Face, the object side of the third lens and image side surface are aspherical；
4th lens have positive refractive index, and the object side of the 4th lens is convex surface, and the image side surface of the 4th lens is convex
Face；
5th lens have negative refractive index, and the object side of the 5th lens is concave surface, and the image side surface of the 5th lens is recessed
The object side in face, the image side surface and the 5th lens of the 4th lens is mutually glued；
There are the optical imaging lens lens of refractive index there was only above-mentioned five.
Further, which is all made of glass material to the 5th lens and is made.
Further, which also meets: 1.6 < nd3 < 1.8,50 < vd3 < 55, wherein nd3 is the third
For lens in the refractive index of d line, vd3 is abbe number of the third lens in d line.
Further, which also meets: 1.7 < nd4 < 1.9,35 < vd4 < 50,1.45 < nd5 < 1.6,60 <
Vd5 < 70, wherein nd4 and nd5 is respectively the refractive index of the 4th lens and the 5th lens in d line, and vd4 and vd5 are respectively should
The abbe number of 4th lens and the 5th lens in d line.
Further, which also meets: 18mm < | f1 | < 20mm, 0.05m-1<|Φ1|<0.08m-1,
In, f1 is the focal length of first lens, and Φ 1 is first power of lens.
Further, which also meets: 4mm < f2 < 6mm, 0.18m-1<Φ2<0.21m-1, wherein f2 is
The focal length of second lens, Φ 2 are second power of lens.
Further, which also meets: 7.5mm < f45 < 9mm, 0.1m-1<Φ45<0.15m-1, wherein
F45 is the combined focal length of the 4th lens and the 5th lens, and Φ 45 is the 4th lens and the 5th power of lens.
Advantageous effects of the invention:
The present invention has only with five lens, and by the arrangement design of refractive index and face type to each lens
System overall length is shorter, at low cost, and aperture is larger, and optical distortion is smaller, and optical transfer function is managed preferably when nearly object distance uses, solution
Analysis degree is high；And it is suitable for more than 900 nanometers of near infrared light, when imaging, will not reflect the near infrared light of LED light and influence to drive
The advantages of person's of sailing vision.
In addition, all lens of the invention are all made of glass material and are made, larger (- 40 DEG C of the temperature range that can be used
To 105 DEG C), it can normal use under high temperature environment.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention one；
Fig. 2 is that the infrared 905-945nm of the embodiment of the present invention one schemes in the MTF of 110lp/mm；
Fig. 3 is the infrared 905-945nm defocusing curve figure of the embodiment of the present invention one；
Fig. 4 is the curvature of field and distortion schematic diagram of the embodiment of the present invention one；
Fig. 5 is the longitudinal aberration diagram schematic diagram of the embodiment of the present invention one；
Fig. 6 is the structural schematic diagram of the embodiment of the present invention two；
Fig. 7 is that the infrared 905-945nm of the embodiment of the present invention two schemes in the MTF of 110lp/mm；
Fig. 8 is the infrared 905-945nm defocusing curve figure of the embodiment of the present invention two；
Fig. 9 is the curvature of field and distortion schematic diagram of the embodiment of the present invention two；
Figure 10 is the longitudinal aberration diagram schematic diagram of the embodiment of the present invention two；
Figure 11 is the structural schematic diagram of the embodiment of the present invention three；
Figure 12 is that the infrared 905-945nm of the embodiment of the present invention three schemes in the MTF of 110lp/mm；
Figure 13 is the infrared 905-945nm defocusing curve figure of the embodiment of the present invention three；
Figure 14 is the curvature of field and distortion schematic diagram of the embodiment of the present invention three；
Figure 15 is the longitudinal aberration diagram schematic diagram of the embodiment of the present invention three；
Figure 16 is the structural schematic diagram of the embodiment of the present invention four；
Figure 17 is that the infrared 905-945nm of the embodiment of the present invention four schemes in the MTF of 110lp/mm；
Figure 18 is the infrared 905-945nm defocusing curve figure of the embodiment of the present invention four；
Figure 19 is the curvature of field and distortion schematic diagram of the embodiment of the present invention four；
Figure 20 is the longitudinal aberration diagram schematic diagram of the embodiment of the present invention four；
Figure 21 is the numerical tabular of each important parameter of four embodiments of the invention.
Specific embodiment
To further illustrate that each embodiment, the present invention are provided with attached drawing.These attached drawings are that the invention discloses one of content
Point, mainly to illustrate embodiment, and the associated description of specification can be cooperated to explain the operation principles of embodiment.Cooperation ginseng
These contents are examined, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention.In figure
Component be not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
Now in conjunction with the drawings and specific embodiments, the present invention is further described.
Described " lens have positive refractive index (or negative refractive index) ", refers to the lens with first-order theory theoretical calculation
Paraxial refractive index out is positive (or being negative).Described " the object sides (or image side surface) of lens " are defined as imaging ray and pass through
The particular range of lens surface.The face shape bumps judgement of lens can pass through according to the judgment mode of skill usual in the field
The sign of radius of curvature (being abbreviated as R value) judges the bumps of lens face shape deflection.R value common can be used in optical design software
In, such as Zemax or CodeV.R value is also common in the lens data sheet (lens data sheet) of optical design software.With
For object side, when R value be timing, be determined as object side be convex surface；When R value is negative, determine that object side is concave surface.Conversely,
For image side surface, when R value is timing, judgement image side surface is concave surface；When R value is negative, determine that image side surface is convex surface.
The invention discloses a kind of optical imaging lens, along an optical axis successively include the first lens, from object side to image side
Two lens, diaphragm, the third lens, the 4th lens and the 5th lens；First lens to the 5th lens respectively include one towards object
Side and the object side for passing through imaging ray and one are towards image side and the image side surface that passes through imaging ray.
First lens have negative refractive index, and the object side of first lens is concave surface, and the image side surface of first lens is convex
Face.
Second lens have positive refractive index, and the object side of second lens is convex surface, and the image side surface of second lens is convex
Face.
The third lens have positive refractive index, and the object side of the third lens is concave surface, and the image side surface of the third lens is convex
Face, the object side of the third lens and image side surface be it is aspherical, not only reduce cost, also well correct distortion, protect
The quality for having demonstrate,proved imaging, is also exaggerated the aperture of optical imaging lens.
4th lens have positive refractive index, and the object side of the 4th lens is convex surface, and the image side surface of the 4th lens is convex
Face；
5th lens have negative refractive index, and the object side of the 5th lens is concave surface, and the image side surface of the 5th lens is recessed
The object side in face, the image side surface and the 5th lens of the 4th lens is mutually glued；Positive negative lens is mutually glued, corrects color well
Difference.
There are the optical imaging lens lens of refractive index there was only above-mentioned five.The present invention is led to only with five lens
The arrangement design of the refractive index and face type to each lens is crossed, at low cost, aperture shorter (being less than 10mm) with system overall length
Larger, optical distortion is smaller, ensure that the effect of imaging, and optical transfer function is managed preferably when nearly object distance (0.55mm) uses,
Resolution is high；And it is suitable for the near infrared light of more than 900 nanometers (905-945nm), when imaging, will not reflect the close red of LED light
UV light and the advantages of influence Driver Vision.
Preferably, which is all made of glass material to the 5th lens and is made, and the temperature range that can be used is larger
(- 40 DEG C to 105 DEG C), can normal use under high temperature environment.
Preferably, which also meets: 1.6 < nd3 < 1.8,50 < vd3 < 55, wherein nd3 is that the third is saturating
For mirror in the refractive index of d line, vd3 is abbe number of the third lens in d line, further correcting distorted, improves the quality of imaging.
Preferably, which also meets: 1.7 < nd4 < 1.9,35 < vd4 < 50,1.45 < nd5 < 1.6,60 < vd5
< 70, wherein nd4 and nd5 is respectively the refractive index of the 4th lens and the 5th lens in d line, and vd4 and vd5 are respectively the 4th
In the abbe number of d line, further correcting chromatic aberration improves the quality of imaging for lens and the 5th lens.
Preferably, which also meets: 18mm < | f1 | < 20mm, 0.05m-1<|Φ1|<0.08m-1, wherein
F1 is the focal length of first lens, and Φ 1 is first power of lens, so that the first lens are smaller, entire optical imaging lens
Head is more small and exquisite.
Preferably, which also meets: 4mm < f2 < 6mm, 0.18m-1<Φ2<0.21m-1, wherein f2 is should
The focal length of second lens, Φ 2 are second power of lens, optimization whole system configuration, and raising imaging effect.
Preferably, which also meets: 7.5mm < f45 < 9mm, 0.1m-1<Φ45<0.15m-1, wherein f45
For the combined focal length of the 4th lens and the 5th lens, Φ 45 is the 4th lens and the 5th power of lens, and optimization is entire
System configuration, and improve imaging effect.
Optical imaging lens of the invention will be described in detail with specific embodiment below.
Implement one
A kind of optical imaging lens along an optical axis I successively include the first lens 1, the second lens from object side A1 to image side A2
2, diaphragm 6, the third lens 3, the 4th lens 4, the 5th lens 5, protection glass 7 and imaging surface 8；First lens 1 to the 5th are saturating
Mirror 5 respectively includes one towards object side A1 and the object side for passing through imaging ray and one towards image side A2 and keeps imaging ray logical
The image side surface crossed.
First lens 1 have negative refractive index, and the object side 11 of first lens 1 is concave surface, the image side surface of first lens 1
12 be convex surface.
Second lens 2 have positive refractive index, and the object side 21 of second lens 2 is convex surface, the image side surface of second lens 2
22 be convex surface.
The third lens 3 have positive refractive index, and the object side 31 of the third lens 3 is concave surface, the image side surface of the third lens 3
32 be convex surface, and the object side 31 of the third lens 3 and image side surface 32 are aspherical.
4th lens 4 have positive refractive index, and the object side 41 of the 4th lens 4 is convex surface, the image side surface of the 4th lens 4
42 be convex surface；
5th lens 5 have negative refractive index, and the object side 51 of the 5th lens 5 is concave surface, the image side surface of the 5th lens 5
52 be concave surface, and the image side surface 42 of the 4th lens 4 and the object side 51 of the 5th lens 5 are mutually glued.
First lens are all made of glass material to the 5th lens and are made.
The detailed optical data of this specific embodiment are as shown in table 1-1.
The detailed optical data of table 1-1 embodiment one
In this specific embodiment, the object side 31 of the third lens 3 and image side surface 32 are defined according to following aspheric curve formula:
Wherein:
Z: (point for being y apart from optical axis on aspherical and is tangential on cutting for vertex on aspherical optical axis for aspherical depth
Face, vertical range between the two)；
C: the curvature (the vertex curvature) of aspheric vertex of surface；
K: conical surface coefficient (Conic Constant)；
Radial distance (radial distance)；
rn: normalization radius (normalizationradius (NRADIUS))；
U:r/rn；
am: m rank QconCoefficient (is the mth Qconcoefficient)；
Qm con: m rank QconMultinomial (the mth Qconpolynomial)；
Each aspherical parameter detailed data please refers to following table:
The numerical value of other correlated condition expression formulas of this specific embodiment please refers to Figure 21.
The MTF transfer curve figure of the infrared 905-945nm of this specific embodiment is detailed in Fig. 2, it can be seen that resolving power
Good, high resolution, the defocusing curve figure of infrared 905-945nm is detailed in Fig. 3, and the curvature of field and distortion figure are detailed in (A) and (B) of Fig. 4, can
To find out that distortion is small, longitudinal spherical aberration figure is detailed in Fig. 5, it can be seen that aberration is smaller.
In this specific embodiment, the focal length f=4.6mm of optical imaging lens；F-number FNO=2.4；First lens 1
Distance TTL=9.67mm of the object side 11 to the imaging surface 8 on optical axis I.
Embodiment two
As shown in fig. 6, the present embodiment is identical as the face type bumps and refractive index of each lens of embodiment one, only each lens
Radius of curvature, the optical parameter difference of lens thickness, lens asphericity coefficient and system focal length on surface.In order to more clearly aobvious
The structure for showing the present embodiment omits the label of identical male and fomale(M&F) type.
The detailed optical data of this specific embodiment are as shown in table 2-1.
The detailed optical data of table 2-1 embodiment two
Each aspherical parameter detailed data of this specific embodiment please refers to following table:
| Surface | 31 | 32 |
| K= | 0 | 0 |
| a4= | -0.04639 | -0.00629 |
| a6= | -0.03123 | 0.003561 |
| a8= | 0.042262 | -0.00247 |
| a10= | -0.0143 | 0.000447 |
| a12= | 0.005416 | 0.001123 |
| a14= | -0.00274 | -0.00044 |
| a16= | 0.0005189 | 0.000047 |
The numerical value of other correlated condition expression formulas of this specific embodiment please refers to Figure 21.
The MTF transfer curve figure of the infrared 905-945nm of this specific embodiment is detailed in Fig. 7, it can be seen that resolving power
Good, high resolution, the defocusing curve figure of infrared 905-945nm is detailed in Fig. 8, and the curvature of field and distortion figure are detailed in (A) and (B) of Fig. 9, can
To find out that distortion is small, longitudinal spherical aberration figure is detailed in Figure 10, it can be seen that aberration is smaller.
In this specific embodiment, the focal length f=4.6mm of optical imaging lens；F-number FNO=2.4；First lens 1
Distance TTL=9.68mm of the object side 11 to the imaging surface 8 on optical axis I.
Embodiment three
As shown in figure 11, the present embodiment is identical as the face type bumps and refractive index of each lens of embodiment one, only each
Radius of curvature, the optical parameter difference of lens thickness, lens asphericity coefficient and system focal length on mirror surface.In order to more clearly
The structure for showing the present embodiment omits the label of identical male and fomale(M&F) type.
The detailed optical data of this specific embodiment are as shown in table 3-1.
The detailed optical data of table 3-1 embodiment three
| Surface | Bore (mm) | Radius of curvature (mm) | Thickness (mm) | Material | Refractive index | Abbe number | Focal length (mm) | |
| - | Object plane shot | |||||||
| 11 | First lens | 3.877 | -6.200 | 0.573 | H-K9L | 1.517 | 64.212 | -18.380 |
| 12 | 3.468 | -18.960 | 0.097 | |||||
| 21 | Second lens | 5.000 | 5.478 | 1.343 | H-ZF62 | 1.923 | 20.883 | 5.010 |
| 22 | 5.000 | -20.955 | 0.176 | |||||
| 6 | Diaphragm | 1.813 | Infinity | 1.835 | ||||
| 31 | The third lens | 2.718 | -1.287 | 0.897 | M-LAC130 | 1.694 | 53.201 | 170.110 |
| 32 | 4.000 | -1.632 | 0.102 | |||||
| 41 | 4th lens | 6.540 | 6.090 | 2.013 | H-ZLAF53B | 1.834 | 37.229 | 5.300 |
| 42 | 6.800 | -12.596 | 0 | |||||
| 51 | 5th lens | 6.800 | -12.596 | 0.693 | H-BAK4 | 1.552 | 63.334 | -11.580 |
| 52 | 6.236 | 12.847 | 1.056 | |||||
| 7 | Protect glass | 6.255 | Infinity | 0.445 | H-K9L | 1.517 | 64.212 | Infinity |
| - | 6.263 | Infinity | 0.458 | |||||
| 8 | Imaging surface | 6.291 | Infinity |
Each aspherical parameter detailed data of this specific embodiment please refers to following table:
| Surface | 31 | 32 |
| K= | 0 | 0 |
| a4= | -0.05215 | -0.00262 |
| a6= | -0.04332 | -0.00106 |
| a8= | 0.061348 | 0.001469 |
| a10= | -0.02258 | -0.00081 |
| a12= | 0.00281 | 0.000988 |
| a14= | 0 | -0.00032 |
| a16= | 0 | 0.0000313 |
The numerical value of other correlated condition expression formulas of this specific embodiment please refers to Figure 21.
The MTF transfer curve figure of the infrared 905-945nm of this specific embodiment is detailed in Figure 12, it can be seen that resolving power
Good, high resolution, the defocusing curve figure of infrared 905-945nm is detailed in Figure 13, and the curvature of field and distortion figure are detailed in (A) and (B) of Figure 14,
It can be seen that distortion is small, longitudinal spherical aberration figure is detailed in Figure 15, it can be seen that aberration is smaller.
In this specific embodiment, the focal length f=4.6mm of optical imaging lens；F-number FNO=2.4；First lens 1
Distance TTL=9.69mm of the object side 11 to the imaging surface 8 on optical axis I.
Example IV
As shown in figure 16, the present embodiment is identical as the face type bumps and refractive index of each lens of embodiment one, only each
Radius of curvature, the optical parameter difference of lens thickness, lens asphericity coefficient and system focal length on mirror surface.In order to more clearly
The structure for showing the present embodiment omits the label of identical male and fomale(M&F) type.
The detailed optical data of this specific embodiment are as shown in table 4-1.
The detailed optical data of table 4-1 example IV
| Surface | Bore (mm) | Radius of curvature (mm) | Thickness (mm) | Material | Refractive index | Abbe number | Focal length (mm) | |
| - | Object plane shot | |||||||
| 11 | First lens | 3.913 | -6.234 | 0.577 | H-K9L | 1.517 | 64.212 | -18.350 |
| 12 | 3.500 | -19.335 | 0.105 | |||||
| 21 | Second lens | 4.600 | 5.248 | 1.346 | H-ZF62 | 1.923 | 20.883 | 4.930 |
| 22 | 4.600 | -23.252 | 0.186 | |||||
| 6 | Diaphragm | 1.796 | Infinity | 1.798 | ||||
| 31 | The third lens | 2.671 | -1.221 | 0.836 | M-LAC130 | 1.694 | 53.201 | -767.100 |
| 32 | 3.834 | -1.563 | 0.112 | |||||
| 41 | 4th lens | 6.500 | 6.232 | 2.016 | H-ZLAF53B | 1.834 | 37.229 | 5.110 |
| 42 | 6.800 | -10.672 | 0 | |||||
| 51 | 5th lens | 6.800 | -10.672 | 0.663 | H-K3 | 1.505 | 64.780 | -11.520 |
| 52 | 6.411 | 12.597 | 1.062 | |||||
| 7 | Protect glass | 6.379 | Infinity | 0.445 | H-K9L | 1.517 | 64.212 | Infinity |
| - | 6.365 | Infinity | 0.438 | |||||
| 8 | Imaging surface | 6.344 | Infinity |
Each aspherical parameter detailed data of this specific embodiment please refers to following table:
| Surface | 31 | 32 |
| K= | 0 | 0 |
| a4= | -0.07513 | -0.00358 |
| a6= | -0.04499 | 0.00157 |
| a8= | 0.075076 | -0.00163 |
| a10= | -0.02837 | 0.000827 |
| a12= | 0.003486 | 0.001124 |
| a14= | 0 | -0.00054 |
| a16= | 0 | 0.00006641 |
The numerical value of other correlated condition expression formulas of this specific embodiment please refers to Figure 21.
The MTF transfer curve figure of the infrared 905-945nm of this specific embodiment is detailed in Figure 17, it can be seen that resolving power
Good, high resolution, the defocusing curve figure of infrared 905-945nm is detailed in Figure 18, and the curvature of field and distortion figure are detailed in (A) and (B) of Figure 19,
It can be seen that distortion is small, longitudinal spherical aberration figure is detailed in Figure 20, it can be seen that aberration is smaller.
In this specific embodiment, the focal length f=4.6mm of optical imaging lens；F-number FNO=2.4；First lens 1
Distance TTL=9.58mm of the object side 11 to the imaging surface 8 on optical axis I.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by the appended claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (7)
1. a kind of optical imaging lens, it is characterised in that: from object side to image side along an optical axis successively include the first lens, second thoroughly
Mirror, diaphragm, the third lens, the 4th lens and the 5th lens；First lens to the 5th lens respectively include one towards object side and
The object side that passes through imaging ray and one is towards image side and the image side surface that passes through imaging ray；
First lens have negative refractive index, and the object side of first lens is concave surface, and the image side surface of first lens is convex surface；
Second lens have positive refractive index, and the object side of second lens is convex surface, and the image side surface of second lens is convex surface；
The third lens have positive refractive index, and the object side of the third lens is concave surface, and the image side surface of the third lens is convex surface, should
The object side of the third lens and image side surface are aspherical；
4th lens have positive refractive index, and the object side of the 4th lens is convex surface, and the image side surface of the 4th lens is convex surface；
5th lens have negative refractive index, and the object side of the 5th lens is concave surface, and the image side surface of the 5th lens is concave surface, should
The object side of the image side surface and the 5th lens of 4th lens is mutually glued；
There are the optical imaging lens lens of refractive index there was only above-mentioned five.
2. optical imaging lens according to claim 1, it is characterised in that: first lens to the 5th lens are all made of glass
Glass material is made.
3. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: 1.6 < nd3
< 1.8,50 < vd3 < 55, wherein nd3 is refractive index of the third lens in d line, and vd3 is dispersion system of the third lens in d line
Number.
4. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: 1.7 < nd4
< 1.9,35 < vd4 < 50,1.45 < nd5 < 1.6,60 < vd5 < 70, wherein nd4 and nd5 is respectively the 4th lens and the 5th lens
In the refractive index of d line, vd4 and vd5 are respectively the abbe number of the 4th lens and the 5th lens in d line.
5. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: 18mm < |
F1 | < 20mm, 0.05m-1<|Φ1|<0.08m-1, wherein f1 is the focal length of first lens, and Φ 1 is the light focus of first lens
Degree.
6. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: 4mm < f2 <
6mm, 0.18m-1<Φ2<0.21m-1, wherein f2 is the focal length of second lens, and Φ 2 is second power of lens.
7. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet: 7.5mm <
F45 < 9mm, 0.1m-1<Φ45<0.15m-1, wherein f45 is the combined focal length of the 4th lens and the 5th lens, and Φ 45 is should
4th lens and the 5th power of lens.
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| CN110850560A (en) * | 2019-12-24 | 2020-02-28 | 厦门力鼎光电股份有限公司 | Optical lens |
| CN111077602A (en) * | 2020-01-08 | 2020-04-28 | 厦门力鼎光电股份有限公司 | 4K lens matched with liquid lens |
| CN111175936A (en) * | 2020-01-17 | 2020-05-19 | 厦门力鼎光电股份有限公司 | Optical imaging lens |
| CN112612116A (en) * | 2020-12-30 | 2021-04-06 | 厦门力鼎光电股份有限公司 | Optical imaging lens |
| CN112630954A (en) * | 2020-12-30 | 2021-04-09 | 厦门力鼎光电股份有限公司 | Eyepiece optical system |
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