CN106970454B - The infrared Single wavelength lens set of four-piece type - Google Patents
The infrared Single wavelength lens set of four-piece type Download PDFInfo
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- CN106970454B CN106970454B CN201610023232.8A CN201610023232A CN106970454B CN 106970454 B CN106970454 B CN 106970454B CN 201610023232 A CN201610023232 A CN 201610023232A CN 106970454 B CN106970454 B CN 106970454B
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- 230000015572 biosynthetic process Effects 0.000 claims abstract description 20
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims description 32
- 230000004304 visual acuity Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 29
- 229920003023 plastic Polymers 0.000 description 22
- 239000004033 plastic Substances 0.000 description 22
- 230000004075 alteration Effects 0.000 description 13
- 238000003384 imaging method Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 201000009310 astigmatism Diseases 0.000 description 10
- 238000001914 filtration Methods 0.000 description 10
- 239000011521 glass Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000005286 illumination Methods 0.000 description 1
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Classifications
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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
- G02B13/004—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 four 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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/008—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras designed for infrared light
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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
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The present invention is a kind of infrared Single wavelength lens set of four-piece type, sequentially includes by object side to image side: the first lens have refracting power；Aperture；Second lens have positive refracting power；The third lens have positive refracting power；4th lens have positive refracting power；Wherein the focal length of the first lens is f1, and the synthesis focal length of the second lens and the third lens is f23, and meets following condition: -210 < f1/f23 < 365.When f1/f23 meets above-mentioned condition, then it can make the infrared Single wavelength lens set of four-piece type while obtaining extensive picture angle (field angle), the significant promotion of resolving power.
Description
Technical field
The present invention relates to lens sets, more particularly to a kind of infrared unicast of miniaturization four-piece type applied on electronic product
Long lens set.
Background technique
Digital audio-effect processing is constantly brought forth new ideas, is changed now, especially the digital carrier in digital camera and mobile phone etc.
All towards miniaturization, and photosensory assembly such as CCD or CMOS is made also to be required smallerization, in infrared ray focusing lens application,
In addition to applying in photography, it is diverted to infrared receiver and the induction field of game machine, and largely also in recent years to make it
The range that game machine incudes user is broader, at present the lens set of receiving infrared-ray wavelength, mostly to draw the biggish wide-angle in angle
Lens set is mainstream.
Wherein, applicant is previously it is also proposed that the received lens set of the related IR wavelength of more than one piece, but at present game machine be with
Based on more three-dimensional, the true and 3D game of telepresenc, therefore with regard to current or previous applicant lens set, all swum with the plane of 2D
Play detecting is requires, so that being unable to satisfy the depth feelings that 3D game stresses answers effect.
Furthermore the related dedicated infrared receiver of game machine, induction lens set use glass lens to pursue cheap,
One it is poor to carry out material translucency is to influence one of game machine depth insufficient detection precision key element, two come glass lens be easy in
Environment temperature overheat or supercooling so that lens set focal length change and can not exact focus detecting, as described above, be at present it is infrared
The lens set of line wavelength reception is unable to satisfy the two big technical tasks that 3D game depth distance accurately incudes.
In view of this, how to provide a kind of accurate depth distance detecting, receive, and prevent from lens set focal length from changing influencing
Depth detects effect, is the received lens set of the IR wavelength technical bottleneck suddenly to be overcome at present then.
Summary of the invention
The purpose of the present invention is to provide a kind of infrared Single wavelength lens set of four-piece type, espespecially a kind of promotion picture angle, tool are high
Analytic ability, short lens length, small distortion the infrared Single wavelength lens set of four-piece type.
In order to reach foregoing purpose, a kind of infrared Single wavelength lens set of four-piece type is provided according to the present invention, by object side to picture
Side sequentially includes: the first lens, has refracting power, is concave surface at the dipped beam axis of object side surface, is at the dipped beam axis of image side surface
Convex surface, object side surface are aspherical with an image side surface at least surface；Aperture；Second lens have positive refracting power, object side
It is convex surface at the dipped beam axis of surface, is convex surface at the dipped beam axis of image side surface, object side surface is with an image side surface at least surface
It is aspherical；The third lens have positive refracting power, are concave surface at the dipped beam axis of object side surface, are convex at the dipped beam axis of image side surface
Face, object side surface are aspherical with an image side surface at least surface；4th lens, have positive refracting power, and object side surface is close
It is convex surface at optical axis, is concave surface at the dipped beam axis of image side surface, object side surface is aspherical with an image side surface at least surface；
Wherein the focal length of the first lens is f1, and the synthesis focal length of the second lens and the third lens is f23, and meets following item
Part: -210 < f1/f23 < 365.
When f1/f23 meets above-mentioned condition, then the infrared Single wavelength lens set of four-piece type can be made to obtain extensive picture angle
While (field angle), the significant promotion of resolving power.
Preferably, the focal length of the first lens is f1, the focal length of the second lens is f2, and meets following condition: -230 < f1/
f2<390.Make the configuration of the refracting power of the first lens and the second lens more appropriate as a result, extensive picture angle can be help to obtain
(field angle) and the excessive increase for reducing system aberration.
Preferably, the focal length of the third lens is f3, the focal length of the second lens is f2, and meets following condition: 3.5 < f3/f2
<86.As a result, can lifting system periphery resolving power and illumination.
Preferably, the focal length of the third lens is f3, the focal length of the 4th lens is f4, and meets following condition: 0.5 < f3/f4
<39.As a result, can active balance system refracting power configuration, facilitate desensitising to promote manufacturing yield.
Preferably, the focal length of the first lens is f1, the focal length of the third lens is f3, and meets following condition: -55 < f1/f3
<100.The positive refracting power for effectively distributing the first lens as a result, reduces the susceptibility of the infrared Single wavelength lens set of four-piece type.
Preferably, the focal length of the second lens is f2, the focal length of the 4th lens is f4, and meets following condition: 0.05 < f2/
f4<0.6.The positive refracting power distribution of system is more appropriate as a result, is conducive to update the system aberration to improve system imaging quality.
Preferably, the focal length of the third lens is f3, the synthesis focal length of the first lens and the second lens is f12, and under satisfaction
Column condition: 3.5 < f3/f12 < 93.It can help to obtain extensive picture angle (field angle) as a result, and effectively correct curvature of the image.
Preferably, the synthesis focal length of the first lens and the second lens is f12, the synthesis focal length of the third lens and the 4th lens
For f34, and meet following condition: 0.35 < f12/f34 < 0.65.Can help to obtain as a result, it is extensive draw angle (field angle) and
Effectively amendment curvature of the image.
Preferably, the focal length of the first lens is f1, the second lens, the third lens and the synthesis focal length of the 4th lens are
F234, and meet following condition: -280 < f1/f234 < 480.It can help to obtain extensive picture angle (field angle) as a result, and have
Effect amendment curvature of the image.
Preferably, the maximum field of view angle of the infrared Single wavelength lens set of four-piece type is FOV, and meet following condition: 45 < FOV <
75.Make the infrared Single wavelength lens set of four-piece type that there can be larger field angle appropriate as a result,.
Preferably, the second lens are in, with a thickness of CT2, the second lens and the third lens are in the interval distance on optical axis on optical axis
From for T23, and meet following condition: 1.5 < CT2/T23 < 2.6.The spacing between the thickness and lens of the second lens is distributed as a result,
The total length of overall lens system can be shortened.
Preferably, the second lens and the third lens are T23 in the spacing distance on optical axis, the third lens are in the thickness on optical axis
Degree is CT3, and meets following condition: 0.6 < T23/CT3 < 1.3.System off-axis incident light is by the second lens and the as a result,
The height of three lens is relatively large, so that the field that the third lens have sufficient ability to go the amendment infrared Single wavelength lens set of four-piece type
Bent, distortion and coma, in favor of correcting the quality of image.
Preferably, the third lens are in, with a thickness of CT3, the third lens and the 4th lens are in the interval distance on optical axis on optical axis
From for T34, and meet following condition: 7 < CT3/T34 < 12.5.The spacing between the thickness and lens of the third lens is distributed as a result,
The total length of overall lens system can be shortened.
Preferably, the abbe number of the second lens is V2, the abbe number of the third lens is V3, and meets following condition:
30<V2-V3<42.It can be conducive to the color difference of update the system as a result,.
Preferably, the f-number of the infrared Single wavelength lens set of four-piece type is Fno, and meet following condition: 1.2 < Fno <
1.8.As a result, can the infrared Single wavelength lens set of appropriate adjustment four-piece type aperture size, make the infrared Single wavelength lens set of four-piece type
Characteristic with large aperture.
It is related the present invention to reach above-mentioned purpose, used technology, means and other the effect of, hereby lift five preferably it is feasible
Embodiment simultaneously cooperates schema detailed description is as follows.
Detailed description of the invention
Figure 1A is the schematic diagram of the infrared Single wavelength lens set of four-piece type of the embodiment of the present invention one.
Figure 1B is sequentially that spherical aberration, astigmatism and the distortion of the infrared Single wavelength lens set of four-piece type of embodiment one are bent from left to right
Line chart.
Fig. 2A is the schematic diagram of the infrared Single wavelength lens set of four-piece type of the embodiment of the present invention two.
Fig. 2 B is sequentially that spherical aberration, astigmatism and the distortion of the infrared Single wavelength lens set of four-piece type of embodiment two are bent from left to right
Line chart.
Fig. 3 A is the schematic diagram of the infrared Single wavelength lens set of four-piece type of the embodiment of the present invention three.
Fig. 3 B is sequentially that spherical aberration, astigmatism and the distortion of the infrared Single wavelength lens set of four-piece type of embodiment three are bent from left to right
Line chart.
The schematic diagram of the infrared Single wavelength lens set of four-piece type of the non-the embodiment of the present invention four of Fig. 4 A.
Fig. 4 B is sequentially that spherical aberration, astigmatism and the distortion of the infrared Single wavelength lens set of four-piece type of example IV are bent from left to right
Line chart.
Fig. 5 A is the schematic diagram of the infrared Single wavelength lens set of four-piece type of the embodiment of the present invention five.
Fig. 5 B is sequentially that spherical aberration, astigmatism and the distortion of the infrared Single wavelength lens set of four-piece type of embodiment five are bent from left to right
Line chart.
Sign flag illustrates in attached drawing:
100,200,300,400,500: aperture；
110,210,310,410,510: the first lens；
111,211,311,411,511: object side surface；
112,212,312,412,512: image side surface；
120,220,320,420,520: the second lens；
121,221,321,421,521: object side surface；
122,222,322,422,522: image side surface；
130,230,330,430,530: the third lens；
131,231,331,431,531: object side surface；
132,232,332,432,532: image side surface；
140,240,340,440,540: the four lens；
141,241,341,441,541: object side surface；
142,242,342,442,542: image side surface；
170,270,370,470,570: infrared ray filters out filtering assembly；
180,280,380,480,580: imaging surface；
190,290,390,490,590: optical axis；
F: the focal length of the infrared Single wavelength lens set of four-piece type；
Fno: the f-number of the infrared Single wavelength lens set of four-piece type；
FOV: maximum field of view angle in the infrared Single wavelength lens set of four-piece type；
The focal length of f1: the first lens；
The focal length of f2: the second lens；
F3: the focal length of the third lens；
The focal length of f4: the four lens；
The synthesis focal length of f12: the first lens and the second lens；
The synthesis focal length of f23: the second lens and the third lens；
F34: the synthesis focal length of the third lens and the 4th lens；
The synthesis focal length of f234: the second lens, the third lens and the 4th lens；
The abbe number of V2: the second lens；
V3: the abbe number of the third lens；
CT2: the second lens are in the thickness on optical axis；
CT3: the third lens are in the thickness on optical axis；
T23: the second lens and the third lens are in the spacing distance on optical axis；
T34: the third lens and the 4th lens are in the spacing distance on optical axis.
Specific embodiment
Clear, complete description is carried out to technical solution of the present invention below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment one
Figure 1A and Figure 1B is please referred to, wherein Figure 1A is painted the infrared Single wavelength eyeglass of four-piece type according to the embodiment of the present invention one
The schematic diagram of group, Figure 1B are sequentially the spherical aberration of the infrared Single wavelength lens set of four-piece type of embodiment one, astigmatism and askew from left to right
Bent curve graph.By Figure 1A it is found that the infrared Single wavelength lens set of four-piece type includes aperture 100 and optics group, optics group is by object side
It sequentially include that the first lens 110, the second lens 120, the third lens 130, the 4th lens 140, infrared ray filter out optical filtering to image side
Component 170 and imaging surface 180, the lens for wherein having refracting power in the infrared Single wavelength lens set of four-piece type are four.Aperture
100 are arranged between the image side surface 112 of the first lens 110 and the image side surface 122 of the second lens 120.
First lens 110 have negative refracting power, and are plastic material, are concave surface at 111 dipped beam axis 190 of object side surface,
It is convex surface at its 112 dipped beam axis 190 of image side surface, and object side surface 111 and image side surface 112 are all aspherical.
Second lens 120 have positive refracting power, and are plastic material, are convex surface at 121 dipped beam axis 190 of object side surface,
It is convex surface at its 122 dipped beam axis 190 of image side surface, and object side surface 121 and image side surface 122 are all aspherical.
The third lens 130 have positive refracting power, and are plastic material, are concave surface at 131 dipped beam axis 190 of object side surface,
It is convex surface at its 132 dipped beam axis 190 of image side surface, and object side surface 131 and image side surface 132 are all aspherical.
4th lens 140 have positive refracting power, and are plastic material, are convex surface at 141 dipped beam axis 190 of object side surface,
It is concave surface at its 142 dipped beam axis 190 of image side surface, and object side surface 141 and image side surface 142 are all aspherical.
It is glass material that infrared ray, which filters out filtering assembly 170, is set between the 4th lens 140 and imaging surface 180 and not
Influence the focal length of the infrared Single wavelength lens set of four-piece type.
The aspherical fitting equation of above-mentioned each lens is expressed as follows:
Wherein z is along 190 direction of optical axis in the positional value that be highly the position of h make to refer to surface vertices；C is lens measure
Face close to optical axis 190 curvature, and be radius of curvature (R) inverse (c=1/R), R be lens surface close to optical axis 190 song
Rate radius, h are vertical range of the lens surface apart from optical axis 190, and k is circular cone coefficient (conic constant), and A, B, C,
D, E, G ... be order aspherical coefficients.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the focal length of the infrared Single wavelength lens set of four-piece type is f, four
The f-number (f-number) of the infrared Single wavelength lens set of chip is Fno, maximum field of view in the infrared Single wavelength lens set of four-piece type
Angle (drawing angle) is FOV, and numerical value is as follows: f=1.241 (millimetre)；Fno=1.4；And FOV=60 (degree).
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the focal length of the first lens 110 is f1, the second lens 120
Synthesis focal length with the third lens 130 is f23, and meets following condition: f1/f23=-24.071.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the focal length of the first lens 110 is f1, the second lens 120
Focal length be f2, and meet following condition: f1/f2=-29.133.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the focal length of the third lens 130 is f3, the second lens 120
Focal length be f2, and meet following condition: f3/f2=22.598.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the focal length of the third lens 130 is f3, the 4th lens 140
Focal length be f4, and meet following condition f3/f4=8.144.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the focal length of the first lens 110 is f1, the third lens 130
Focal length be f3, and meet following condition: f1/f3=-1.289.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the focal length of the second lens 120 is f2, the 4th lens 140
Focal length be f4, and meet following condition: f2/f4=0.360.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the focal length of the third lens 130 is f3, the first lens 110
Synthesis focal length with the second lens 120 is f12, and meets following condition: f3/f12=23.929.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the synthesis focal length of the first lens 110 and the second lens 120
For f12, the synthesis focal length of the third lens 130 and the 4th lens 140 is f34, and meets following condition: f12/f34=0.476.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the focal lengths of the first lens 110 is f1, the second lens 120,
The synthesis focal length of the third lens 130 and the 4th eyeglass 140 is f234, and meets following condition: f1/f234=-36.974.
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the second lens 120 on optical axis 180 with a thickness of CT2,
Second lens 120 and the third lens 130 are T23 in the spacing distance on optical axis 190, and meet following condition: CT2/T23=
2.407。
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the second lens 120 are with the third lens 130 in optical axis 190
On spacing distance be T23, the third lens 130 are in, with a thickness of CT3, and meeting following condition: T23/CT3=on optical axis 180
0.780。
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the third lens 130 on optical axis 180 with a thickness of CT3,
The third lens 130 and the 4th lens 140 are T34 in the spacing distance on optical axis 190, and meet following condition: CT3/T34=
10.635。
In the infrared Single wavelength lens set of the four-piece type of embodiment one, the abbe number of the second lens 120 is V2, the third lens
130 abbe number is V3, and meets following condition: V2-V3=32.03.
Cooperate again referring to following table 1 and table 2.
Table 1 is the detailed structured data of Figure 1A embodiment one, and wherein the unit of radius of curvature, thickness and focal length is mm, and
Surface 0-13 is sequentially indicated by the surface of object side to image side.Table 2 is the aspherical surface data in embodiment one, wherein k table is aspherical
Conical surface coefficient in fitting equation, A, B, C, D, E, F, G, H ... are order aspherical coefficients.In addition, following embodiment
Table is the schematic diagram and aberration curve figure of corresponding each embodiment, in table the definition of data all with the table 1 and table of embodiment one
2 definition is identical, is not added repeats herein.
Embodiment two
A and Fig. 2 B referring to figure 2., wherein Fig. 2A is painted the infrared Single wavelength eyeglass of four-piece type according to the embodiment of the present invention two
The schematic diagram of group, Fig. 2 B are sequentially the spherical aberration of the infrared Single wavelength lens set of four-piece type of embodiment two, astigmatism and askew from left to right
Bent curve graph.By Fig. 2A it is found that the infrared Single wavelength lens set of four-piece type includes aperture 200 and optics group, optics group is by object side
It sequentially include that the first lens 210, the second lens 220, the third lens 230, the 4th lens 240, infrared ray filter out optical filtering to image side
Component 270 and imaging surface 280, the lens for wherein having refracting power in the infrared Single wavelength lens set of four-piece type are four.Aperture
200 are arranged between the image side surface 212 of the first lens 210 and the image side surface 222 of the second lens 220.
First lens 210 have positive refracting power, and are plastic material, are concave surface at 211 dipped beam axis 290 of object side surface,
It is convex surface at its 212 dipped beam axis 290 of image side surface, and object side surface 211 and image side surface 212 are all aspherical.
Second lens 220 have positive refracting power, and are plastic material, are convex surface at 221 dipped beam axis 290 of object side surface,
It is convex surface at its 222 dipped beam axis 290 of image side surface, and object side surface 221 and image side surface 222 are all aspherical.
The third lens 230 have positive refracting power, and are plastic material, are concave surface at 231 dipped beam axis 290 of object side surface,
It is convex surface at its 232 dipped beam axis 290 of image side surface, and object side surface 231 and image side surface 232 are all aspherical.
4th lens 240 have positive refracting power, and are plastic material, are convex surface at 241 dipped beam axis 290 of object side surface,
It is concave surface at its 242 dipped beam axis 290 of image side surface, and object side surface 241 and image side surface 242 are all aspherical.
It is glass material that infrared ray, which filters out filtering assembly 270, is set between the 4th lens 240 and imaging surface 280 and not
Influence the focal length of the infrared Single wavelength lens set of four-piece type.
Cooperate again referring to following table 3 and table 4.
In embodiment two, aspherical fitting equation indicates the form such as embodiment one.In addition, the definition of following table parameter
It is all the same as example 1, not in this to go forth.
Cooperation table 3 and table 4 can extrapolate following data:
Embodiment three
A and Fig. 3 B referring to figure 3., wherein Fig. 3 A is painted the infrared Single wavelength mirror of four-piece type according to the embodiment of the present invention three
The schematic diagram of piece group, Fig. 3 B be sequentially from left to right the spherical aberration of the infrared Single wavelength lens set of four-piece type of embodiment three, astigmatism and
Distort curve graph.By Fig. 3 A it is found that the infrared Single wavelength lens set of four-piece type includes aperture 300 and optics group, optics group is by object
Side to image side sequentially includes that the first lens 310, the second lens 320, the third lens 330, the 4th lens 340, infrared ray filter out
Optical assembly 370 and imaging surface 380, the lens for wherein having refracting power in the infrared Single wavelength lens set of four-piece type are four.Aperture
300 are arranged between the image side surface 312 of the first lens 310 and the image side surface 322 of the second lens 320.
First lens 310 have negative refracting power, and are plastic material, are concave surface at 311 dipped beam axis 390 of object side surface,
It is convex surface at its 312 dipped beam axis 390 of image side surface, and object side surface 311 and image side surface 312 are all aspherical.
Second lens 320 have positive refracting power, and are plastic material, are convex surface at 321 dipped beam axis 390 of object side surface,
It is convex surface at its 322 dipped beam axis 390 of image side surface, and object side surface 321 and image side surface 322 are all aspherical.
The third lens 330 have positive refracting power, and are plastic material, are concave surface at 331 dipped beam axis 390 of object side surface,
It is convex surface at its 332 dipped beam axis 390 of image side surface, and object side surface 331 and image side surface 332 are all aspherical.
4th lens 340 have positive refracting power, and are plastic material, are convex surface at 341 dipped beam axis 390 of object side surface,
It is concave surface at its 342 dipped beam axis 390 of image side surface, and object side surface 341 and image side surface 342 are all aspherical.
It is glass material that infrared ray, which filters out filtering assembly 370, is set between the 4th lens 340 and imaging surface 380 and not
Influence the focal length of the infrared Single wavelength lens set of four-piece type.
Cooperate again referring to following table 5 and table 6.
In embodiment three, aspherical fitting equation indicates the form such as embodiment one.In addition, the definition of following table parameter
It is all the same as example 1, not in this to go forth.
Cooperation table 5 and table 6 can extrapolate following data:
Example IV
A and Fig. 4 B referring to figure 4., wherein Fig. 4 A is painted the infrared Single wavelength eyeglass of four-piece type according to the embodiment of the present invention four
The schematic diagram of group, Fig. 4 B are sequentially the spherical aberration of the infrared Single wavelength lens set of four-piece type of example IV, astigmatism and askew from left to right
Bent curve graph.By Fig. 4 A it is found that the infrared Single wavelength lens set of four-piece type includes aperture 400 and optics group, optics group is by object side
It sequentially include that the first lens 410, the second lens 420, the third lens 430, the 4th lens 440, infrared ray filter out optical filtering to image side
Component 470 and imaging surface 480, the lens for wherein having refracting power in the infrared Single wavelength lens set of four-piece type are four.Aperture
400 are arranged between the image side surface 412 of the first lens 410 and the image side surface 422 of the second lens 420.
First lens 410 have negative refracting power, and are plastic material, are concave surface at 411 dipped beam axis 490 of object side surface,
It is convex surface at its 412 dipped beam axis 490 of image side surface, and object side surface 411 and image side surface 412 are all aspherical.
Second lens 420 have positive refracting power, and are plastic material, are convex surface at 421 dipped beam axis 490 of object side surface,
It is convex surface at its 422 dipped beam axis 490 of image side surface, and object side surface 421 and image side surface 422 are all aspherical.
The third lens 430 have positive refracting power, and are plastic material, are concave surface at 431 dipped beam axis 490 of object side surface,
It is convex surface at its 432 dipped beam axis 490 of image side surface, and object side surface 431 and image side surface 432 are all aspherical.
4th lens 440 have positive refracting power, and are plastic material, are convex surface at 441 dipped beam axis 490 of object side surface,
It is concave surface at its 442 dipped beam axis 490 of image side surface, and object side surface 441 and image side surface 442 are all aspherical.
It is glass material that infrared ray, which filters out filtering assembly 470, is set between the 4th lens 440 and imaging surface 480 and not
Influence the focal length of the infrared Single wavelength lens set of four-piece type.
Cooperate again referring to following table 7 and table 8.
In example IV, aspherical fitting equation indicates the form such as embodiment one.In addition, the definition of following table parameter
It is all the same as example 1, not in this to go forth.
Cooperation table 7 and table 8 can extrapolate following data:
Embodiment five
A and Fig. 5 B referring to figure 5., wherein Fig. 5 A is painted the infrared Single wavelength eyeglass of four-piece type according to the embodiment of the present invention five
The schematic diagram of group, Fig. 5 B are sequentially the spherical aberration of the infrared Single wavelength lens set of four-piece type of embodiment five, astigmatism and askew from left to right
Bent curve graph.By Fig. 5 A it is found that the infrared Single wavelength lens set of four-piece type includes aperture 500 and optics group, optics group is by object side
It sequentially include that the first lens 510, the second lens 520, the third lens 530, the 4th lens 540, infrared ray filter out optical filtering to image side
Component 570 and imaging surface 580, the lens for wherein having refracting power in the infrared Single wavelength lens set of four-piece type are four.Aperture
500 are arranged between the image side surface 512 of the first lens 510 and the image side surface 522 of the second lens 520.
First lens 510 have negative refracting power, and are plastic material, are concave surface at 511 dipped beam axis 590 of object side surface,
It is convex surface at its 512 dipped beam axis 590 of image side surface, and object side surface 511 and image side surface 512 are all aspherical.
Second lens 520 have positive refracting power, and are plastic material, are convex surface at 521 dipped beam axis 590 of object side surface,
It is convex surface at its 522 dipped beam axis 590 of image side surface, and object side surface 521 and image side surface 522 are all aspherical.
The third lens 530 have positive refracting power, and are plastic material, are concave surface at 531 dipped beam axis 590 of object side surface,
It is convex surface at its 532 dipped beam axis 590 of image side surface, and object side surface 531 and image side surface 532 are all aspherical.
4th lens 540 have positive refracting power, and are plastic material, are convex surface at 541 dipped beam axis 590 of object side surface,
It is concave surface at its 542 dipped beam axis 590 of image side surface, and object side surface 541 and image side surface 542 are all aspherical.
It is glass material that infrared ray, which filters out filtering assembly 570, is set between the 4th lens 540 and imaging surface 580 and not
Influence the focal length of the infrared Single wavelength lens set of four-piece type.
Cooperate again referring to following table 9 and table 10.
In embodiment five, aspherical fitting equation indicates the form such as embodiment one.In addition, the definition of following table parameter
It is all the same as example 1, not in this to go forth.
Cooperation table 9 and table 10 can extrapolate following data:
The material of the infrared Single wavelength lens set of four-piece type provided by the invention, lens can be plastics or glass, when lens material
Matter is plastics, and production cost can be effectively reduced, and the another material for working as lens is glass, then can increase the infrared Single wavelength of four-piece type
The freedom degree of lens set refracting power configuration.In addition, the object side surface of lens and image side table in the infrared Single wavelength lens set of four-piece type
Face can be aspherical to be easy to be fabricated to the shape other than spherical surface to be aspherical, more control variable is obtained, to cut down picture
Difference, and then reduce the number that lens use, therefore the total of the infrared Single wavelength lens set of four-piece type of the invention can be effectively reduced
Length.
In the infrared Single wavelength lens set of four-piece type provided by the invention, for the lens with refracting power, if lens
When surface is convex surface and does not define the convex surface position, then it represents that the lens surface is convex surface at dipped beam axis；If lens surface is
Concave surface and when not defining the concave surface position, then it represents that the lens surface is concave surface at dipped beam axis.
The infrared more visual demand of Single wavelength lens set of four-piece type provided by the invention is applied to the optical system of mobile focusing
In, and the characteristic of excellent lens error correction Yu good image quality is had both, many-sided it can be applied to 3D (three-dimensional) image capture, number
In the electronic image systems such as camera, running gear, Digital Drawing plate or automobile-used photography.
In conclusion the various embodiments described above and attached drawing are only presently preferred embodiments of the present invention, not to limit this
The protection scope of invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done all are answered
It is included within the scope of the present invention.
Claims (15)
1. a kind of infrared Single wavelength lens set of four-piece type, which is characterized in that the infrared Single wavelength lens set of four-piece type includes
One aperture and an optics group, the optics group are made of four lens, and the infrared Single wavelength lens set of four-piece type is by object side
Sequentially include to image side:
First lens have negative refracting power, are concave surface at the object side surface dipped beam axis of first lens, first lens
It is convex surface at the dipped beam axis of image side surface, the object side surface of first lens and a image side surface at least surface are aspheric
Face；
Aperture；
Second lens have positive refracting power, are convex surface at the object side surface dipped beam axis of second lens, second lens
It is convex surface at the dipped beam axis of image side surface, object side surface and an image side surface at least surface for second lens is aspherical；
The third lens have positive refracting power, are concave surface at the object side surface dipped beam axis of the third lens, the third lens
It is convex surface at the dipped beam axis of image side surface, object side surface and an image side surface at least surface for the third lens is aspherical；
4th lens have positive refracting power, are convex surface at the object side surface dipped beam axis of the 4th lens, the 4th lens
It is concave surface at the dipped beam axis of image side surface, object side surface and an image side surface at least surface for the 4th lens is aspherical；
Wherein the focal length of first lens is f1, and the synthesis focal length of second lens and the third lens is f23, and under meeting
Column condition: -210 < f1/f23≤- 8.692.
2. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the focal length of first lens
Focal length for f1, second lens is f2, and meets following condition: -230 < f1/f2 < 390.
3. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the focal length of the third lens
Focal length for f3, second lens is f2, and meets following condition: 3.5 < f3/f2 < 86.
4. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the focal length of the third lens
Focal length for f3, the 4th lens is f4, and meets following condition: 0.5 < f3/f4 < 39.
5. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the focal length of first lens
Focal length for f1, the third lens is f3, and meets following condition: -55 < f1/f3 < 100.
6. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the focal length of second lens
Focal length for f2, the 4th lens is f4, and meets following condition: 0.05 < f2/f4 < 0.6.
7. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the focal length of the third lens
For f3, the synthesis focal length of first lens and the second lens is f12, and meets following condition: 3.5 < f3/f12 < 93.
8. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that first lens and second
The synthesis focal length of lens is f12, and the synthesis focal length of the third lens and the 4th lens is f34, and meets following condition: 0.35
<f12/f34<0.65。
9. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the focal length of first lens
Synthesis focal length for f1, second lens, the third lens and the 4th lens is f234, and meets following condition: -280 < f1/
f234<480。
10. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the infrared list of four-piece type
The maximum field of view angle of wavelength lens set is FOV, and meets following condition: 45 < FOV < 75.
11. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that second lens are in light
On axis in the spacing distance on optical axis is T23 with a thickness of CT2, second lens and the third lens, and meets following condition:
1.5<CT2/T23<2.6。
12. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that second lens and
Three lens are T23 in the spacing distance on optical axis, and the third lens are in, with a thickness of CT3, and meeting following condition on optical axis:
0.6<T23/CT3<1.3。
13. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the third lens are in light
On axis with a thickness of CT3, the third lens and the 4th lens are T34 in the spacing distance on optical axis, and meet following condition:
7<CT3/T34<12.5。
14. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the color of second lens
Dissipating coefficient is V2, and the abbe number of the third lens is V3, and meets following condition: 30 < V2-V3 < 42.
15. the infrared Single wavelength lens set of four-piece type according to claim 1, which is characterized in that the infrared list of four-piece type
The f-number of wavelength lens set is Fno, and meets following condition: 1.2 < Fno < 1.8.
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| CN107219610B (en) * | 2017-07-25 | 2022-09-20 | 浙江舜宇光学有限公司 | Imaging lens |
| WO2019052200A1 (en) | 2017-09-14 | 2019-03-21 | 浙江舜宇光学有限公司 | Optical imaging camera |
| CN108008525B (en) * | 2018-01-05 | 2023-06-09 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN110161650B (en) * | 2018-02-14 | 2021-07-20 | 新巨科技股份有限公司 | Four-piece infrared single-wavelength lens group |
| CN116299998B (en) * | 2023-01-28 | 2023-10-20 | 湖北华鑫光电有限公司 | Long depth of field 4P scanning gun camera lens |
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| CN101082695A (en) * | 2006-05-31 | 2007-12-05 | 富士能株式会社 | Wide-angle imaging lens |
| CN103809273A (en) * | 2012-11-09 | 2014-05-21 | 大立光电股份有限公司 | Image capturing lens assembly |
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| KR101980660B1 (en) * | 2012-09-18 | 2019-05-22 | 엘지이노텍 주식회사 | Imaging lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101082695A (en) * | 2006-05-31 | 2007-12-05 | 富士能株式会社 | Wide-angle imaging lens |
| CN103809273A (en) * | 2012-11-09 | 2014-05-21 | 大立光电股份有限公司 | Image capturing lens assembly |
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