CN105301740B - The electronic equipment of optical imaging lens and the application optical imaging lens - Google Patents
The electronic equipment of optical imaging lens and the application optical imaging lens Download PDFInfo
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- CN105301740B CN105301740B CN201510819584.XA CN201510819584A CN105301740B CN 105301740 B CN105301740 B CN 105301740B CN 201510819584 A CN201510819584 A CN 201510819584A CN 105301740 B CN105301740 B CN 105301740B
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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
- G02B13/003—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 two lenses
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/19—Sensors therefor
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Abstract
The present invention provides the electronic equipments of a kind of optical imaging lens and the application optical imaging lens, including the first lens, diaphragm and the second lens set gradually from the object side to image side along same optical axis；First lens have positive light coke, and object side is convex surface；Second lens have negative power, and image side surface is convex surface；Optical imaging lens meet following relational expression：0.91<f/TTL<1.3；-3.2<f1*f2/f<-1.5；|d3-d2|<0.2, so as to improve the imaging definition of optical imaging lens by the positional relationship between the parameter that eyeglass is reasonably arranged, eyeglass and the positional relationship between eyeglass and diaphragm to reduce the volume of optical imaging lens.
Description
Technical field
The present invention relates to optical lens technology fields, more specifically to a kind of optical imaging lens and apply the light
Learn the electronic equipment of imaging lens.
Background technique
Iris recognition technology is a kind of technology based on the iris progress identification in eyes, due to each eye of people
Iris it is unique all as fingerprint, therefore, iris recognition technology can be applied to holding the place of requirement in close confidence
With equipment etc..
Existing iris authentication system is all the eye image for first passing through digital camera and acquiring person to be verified, is then divided
Iris image is extracted, then carries out extraction and the coding of feature, the rainbow that will finally store in coding and database to iris image
Film coding compares, and the two is unanimously then verified, and person to be verified can enter place or logging device, otherwise, person to be verified
Place or logging device are not allowed access into.
With the continuous progress of science and technology, it is small and exquisite, light to be gradually applied to mobile phone, plate and notebook etc. for iris authentication system
In thin, portable equipment, therefore, in the optical lens of design acquisition eye image, it usually needs control light as far as possible
The overall length of imaging lens is learned, to reduce the overall dimension of equipment.
Also, while keeping equipment volume small and exquisite, also need to guarantee that the spherical aberration of imaging system is clear to get details
Iris image, therefore, how the structure of reasonable design optical imaging lens and the parameter of eyeglass in optical imaging lens,
Come meet equipment micromation require and imaging fine definition, have become those skilled in the art's technology urgently to be resolved
One of problem.
Summary of the invention
In view of this, the present invention provides the electronic equipment of a kind of optical imaging lens and the application optical imaging lens,
To solve the problems, such as that optical imaging lens clarity is low and bulky in the prior art.
To achieve the above object, the present invention provides the following technical solutions：
A kind of optical imaging lens, including set gradually from the object side to image side along same optical axis the first lens, diaphragm and
Second lens；
First lens have positive light coke, and object side is convex surface；
Second lens have negative power, and image side surface is convex surface；
The optical imaging lens meet following relational expression：
0.91<f/TTL<1.3；-3.2<f1*f2/f<-1.5；|d3-d2|<0.2；
Wherein, TTL is the overall length of the optical imaging lens, and f is the effective focal length of the optical imaging lens, and f1 is institute
The focal length of the first lens is stated, f2 is the focal length of second lens, and d2 is first lens image side surface vertices into diaphragm
The distance of heart point, d3 are distance of the diaphragm central point to the second lens object side surface vertex.
Preferably, the optical imaging lens also meet relational expression：-0.41<c12*c21/c11<-0.15；
Wherein, c11 is the curvature of the first lens object side surface, and c12 is the curvature on first lens image side surface,
C21 is the curvature of the second lens object side surface.
Preferably, the optical imaging lens also meet relational expression：1.83<(Nd1+Nd2)/Nd2<2.03；
Wherein, Nd1 is the material refractive index of first lens, and Nd2 is the material refractive index of second lens.
Preferably, the optical imaging lens also meet relational expression：0.8<(d1+d4)/(d2+d3)<2.1；
Wherein, d1 is first lens in the thickness on optical axis, and d4 is second lens in the thickness on optical axis.
Preferably, the optical imaging lens also meet relational expression：Fno<2.5；
Wherein, Fno is the f-number of the optical imaging lens.
Preferably, the optical imaging lens also meet relational expression：26°<FOV<36°；
Wherein, FOV is the field angle of the optical imaging lens.
Preferably, the optical imaging lens also meet relational expression：TTL<3.85mm.
Preferably, the optical imaging lens further include the optical filter positioned at the image side of second lens.
A kind of electronic equipment, including optical imaging lens and image sensing chip, the optical imaging lens are such as to take up an official post
Optical imaging lens described in one, the imaging surface of described image induction chip are located at the image side of the optical imaging lens.
Compared with prior art, technical solution provided by the present invention has the following advantages that：
The electronic equipment of optical imaging lens provided by the present invention and the application optical imaging lens, including along same light
The first lens, diaphragm and the second lens that axis is set gradually from the object side to image side, also, the optical imaging lens meet relationship
Formula：0.91<f/TTL<1.3,-3.2<f1*f2/f<-1.5,|d3-d2|<0.2, so as to by the way that eyeglass is reasonably arranged
The positional relationship between positional relationship and eyeglass and diaphragm between parameter, eyeglass, to reduce the volume of optical imaging lens,
The imaging definition for improving optical imaging lens, guarantees to get details clearly iris image.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of optical imaging lens disclosed in one embodiment of the invention；
Fig. 2 is the structural schematic diagram of optical imaging lens disclosed in embodiment of the present invention one；
Fig. 3 is the curvature of field and distortion curve of optical imaging lens disclosed in embodiment of the present invention one；
Fig. 4 is the spherical aberration curve graph of optical imaging lens disclosed in embodiment of the present invention one；
Fig. 5 is the structural schematic diagram of optical imaging lens disclosed in embodiment of the present invention two；
Fig. 6 is the curvature of field and distortion curve of optical imaging lens disclosed in embodiment of the present invention two；
Fig. 7 is the spherical aberration curve graph of optical imaging lens disclosed in embodiment of the present invention two；
Fig. 8 is the structural schematic diagram of optical imaging lens disclosed in embodiment of the present invention three；
Fig. 9 is the curvature of field and distortion curve of optical imaging lens disclosed in embodiment of the present invention three；
Figure 10 is the spherical aberration curve graph of optical imaging lens disclosed in embodiment of the present invention three；
Figure 11 is the structural schematic diagram of optical imaging lens disclosed in embodiment of the present invention four；
Figure 12 is the curvature of field and distortion curve of optical imaging lens disclosed in embodiment of the present invention four；
Figure 13 is the spherical aberration curve graph of optical imaging lens disclosed in embodiment of the present invention four；
Figure 14 is the structural schematic diagram of optical imaging lens disclosed in embodiment of the present invention five；
Figure 15 is the curvature of field and distortion curve of optical imaging lens disclosed in embodiment of the present invention five；
Figure 16 is the spherical aberration curve graph of optical imaging lens disclosed in embodiment of the present invention five.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
One embodiment of the application discloses a kind of optical imaging lens, it is preferred that the optical imaging lens are applied to
Iris recognition camera mould group.
With reference to Fig. 1, Fig. 1 is the structural schematic diagram of optical imaging lens provided in this embodiment, the optical imaging lens packet
The first lens 10, diaphragm 20, the second lens 30 and the optical filter 40 set gradually from the object side to image side along same optical axis is included, when
So, also there is an imaging surface 50 in the image side of optical filter 40, which is the imaging surface of image sensing chip, is used for light
Signal is converted to electric signal, and then forms image corresponding with subject.
Specifically, the first lens 10 have positive light coke, and object side is convex surface；Second lens 30 have negative power,
Its image side surface is convex surface；Diaphragm 20 is aperture diaphragm, and the diaphragm 20 is between the first lens 10 and the second lens 30.Further
It should be noted that the material of the first lens 10 and the second lens 30 in the present embodiment is plastic cement, batch of eyeglass may be implemented
Amount production, and then the processing cost of the optical elements such as lens and the cost of optical imaging lens can be greatly lowered, more just
In a wide range of popularization of optical imaging lens.
In the present embodiment, optical imaging lens meet following relational expression：
0.91<f/TTL<1.3；-3.2<f1*f2/f<-1.5；
|d3-d2|<0.2；0.8<(d1+d4)/(d2+d3)<2.1；
Wherein, TTL is the overall length of the optical imaging lens, and f is the effective focal length of the optical imaging lens, and f1 is institute
Stating the focal length of the first lens 10, f2 is the focal length of second lens 30, and d1 is first lens 10 in the thickness on optical axis,
D2 is distance of the 10 image side surface vertices of the first lens to 20 central point of diaphragm, and d3 is 20 central point of diaphragm described in
The distance on 30 object side surface vertex of the second lens, d4 are second lens 30 in the thickness on optical axis.
In order to further increase the performance of the optical imaging lens, the optical imaging lens also need to meet following pass
It is formula：
-0.41<c12*c21/c11<-0.15；1.83<(Nd1+Nd2)/Nd2<2.03；
Wherein, c11 is the curvature of the 10 object side surface of the first lens, and c12 is the 10 image side surface of the first lens
Curvature, c21 are the curvature of the 30 object side surface of the second lens, and Nd1 is the material refractive index of first lens 10, and Nd2 is
The material refractive index of second lens 30.
Based on this, the present embodiment can by be reasonably arranged the first lens 10 and the second lens 30 parameter, first thoroughly
Positional relationship between mirror 10 and the positional relationship and the first lens 10 and the second lens 30 and diaphragm 20 of the second lens 30, it is real
A kind of existing optical imaging lens small with imaging definition height, small volume, field angle.
Explanation is needed further exist for, it can be by the way that the outer diameter size and lens of two lens be rationally arranged in the present embodiment
The use of the structure member of optical imaging lens is reduced in gap between diaphragm, so that the assembly of optical imaging lens is more
Simply, cost is lower.
Optionally, the overall length TTL of the optical imaging lens in the present embodiment meets relational expression：TTL<3.85mm.And
In some cases, the overall length minimum of the optical imaging lens can reach 3.55mm, i.e. 3.55mm<TTL<3.85mm so that
The volume of the optical imaging lens is smaller, can preferably be suitable for the portable electronics such as mobile phone, tablet computer, laptop
Equipment.
In the present embodiment, the curvature on the convex surface of the first lens 10 and the second lens 30 can influence the view of optical imaging lens
Rink corner is based on this, in the case where the rationally curvature of the first lens 10 of setting and the second lens 30, can make in the present embodiment
The field angle FOV of optical imaging lens meet relational expression：26°<FOV<36°.Due to the optical imaging lens field angle compared with
It is small, therefore, it can satisfy simple eye or iris of both eyes identification pixel gathering algorithm technical characteristic demand, while being also able to satisfy portable
The operating distance of electronic equipment brings more comfortable experience to user.
Also, can be arranged by large aperture in the present embodiment guarantee the light of enough near infrared band enter optics at
As camera lens.Optionally, the optical imaging lens in the present embodiment also meet relational expression：Fno<2.5；Wherein, Fno is the optics
The f-number of imaging lens.
In addition, can be entered by the anti-reflection antireflective film filtering that optical filter and lens surface plate in the present embodiment optics at
As the light of camera lens, carry out any small band value of the operation wavelength between 400nm~910nm so that optical imaging lens,
Optionally, the operating wavelength range of the optical imaging lens is 810nm ± 70nm, and allowing for optical imaging lens in this way can
Preferably matching iris recognition sensor special, so that the collected iris image of the optical imaging lens is more clear, accurately.
In the present embodiment, at least one in the object side of the first lens 10 and image side surface be it is aspherical, optionally, object side
Face and image side surface are aspherical；At least one in the object side of second lens 30 and image side surface be it is aspherical, optionally, object
Side and image side surface are aspherical.In order to which the image quality further to the optical imaging lens guarantees, the application
Any one aspheric curve of the first lens 10 and the second lens 30 in above-mentioned any one embodiment is all satisfied following relational expression：
Wherein, the z indicates that the Z coordinate value of lens surface each point, r indicate the Y axis coordinate value of each point on lens surface, c
For the inverse of the radius of curvature R of lens surface, k is circular cone coefficient, α1、α2、α3、α4、α5、α6、α7、α8For even aspheric surface coefficient.
In the description of following each preferred embodiments, the lens that the present embodiment further discloses optical imaging lens are non-
The design parameter and other parameters of spherical surface.
Embodiment one
In present embodiment, the optical imaging lens include first set gradually from the object side to image side along same optical axis
Lens 10, diaphragm 20, the second lens 30, optical filter 40 and imaging surface 50, the structure charts of the optical imaging lens as shown in Fig. 2,
The curvature of field and distortion curve are as shown in figure 3, spherical aberration curve graph is as shown in Figure 4.
The design parameter reference table 1-1 of first lens 10, the second lens 30 and optical filter 40, the first lens 10 and second
The aspherical design parameter of lens 30 is as shown in table 1-2.Wherein, surface 0 indicates object, and surface 1 indicates the first lens 10
Object side surface, surface 2 indicate the first lens 10 image side surface, surface 3 indicate diaphragm 20, the object of 4 second lens 30 of surface
Side surface, surface 5 indicate that the image side surface of the second lens 30, surface 6 indicate that the object side surface of optical filter 40, surface 7 indicate filter
The image side surface of mating plate 40, surface 8 indicate imaging surface 50.
Table 1-1
Table 1-2
Specifically, f/TTL=1.065 in present embodiment meets 0.91<f/TTL<1.3 relational expression；
F1*f2/f=-3.19 meets -3.2<f1*f2/f<- 1.5 relational expression；
| d3-d2 |=0.098, meet | d3-d2 |<0.2 relational expression；
(d1+d4)/(d2+d3)=1.144 meets 0.8<(d1+d4)/(d2+d3)<2.1 relational expression；
C12*c21/c11=-0.193 meets -0.41<c12*c21/c11<- 0.15 relational expression；
(Nd1+Nd2)/Nd2=2.012 meets 1.83<(Nd1+Nd2)/Nd2<2.03 relational expression.
Further, in the present embodiment, the effective focal length f of optical imaging lens is 3.92mm, and f-number Fno is
2.0, field angle FOV is 35.1 °.
Embodiment two
In present embodiment, the optical imaging lens include first set gradually from the object side to image side along same optical axis
Lens 10, diaphragm 20, the second lens 30, optical filter 40 and imaging surface 50, the structure charts of the optical imaging lens as shown in figure 5,
The curvature of field and distortion curve are as shown in fig. 6, spherical aberration curve graph is as shown in Figure 7.
The design parameter reference table 2-1 of first lens 10, the second lens 30 and optical filter 40, the first lens 10 and second
The aspherical design parameter of lens 30 is as shown in table 2-2.Wherein, surface 0 indicates object, and surface 1 indicates the first lens 10
Object side surface, surface 2 indicate the first lens 10 image side surface, surface 3 indicate diaphragm 20, the object of 4 second lens 30 of surface
Side surface, surface 5 indicate that the image side surface of the second lens 30, surface 6 indicate that the object side surface of optical filter 40, surface 7 indicate filter
The image side surface of mating plate 40, surface 8 indicate imaging surface 50.
Table 2-1
Table 2-2
Specifically, f/TTL=1.115 in present embodiment meets 0.91<f/TTL<1.3 relational expression；
F1*f2/f=-2.555 meets -3.2<f1*f2/f<- 1.5 relational expression；
| d3-d2 |=0.07, meet | d3-d2 |<0.2 relational expression；
(d1+d4)/(d2+d3)=1.156 meets 0.8<(d1+d4)/(d2+d3)<2.1 relational expression；
C12*c21/c11=-0.247 meets -0.41<c12*c21/c11<- 0.15 relational expression；
(Nd1+Nd2)/Nd2=2.0 meets 1.83<(Nd1+Nd2)/Nd2<2.03 relational expression.
Further, in the present embodiment, the effective focal length f of optical imaging lens is 3.93mm, and f-number Fno is
2.35, field angle FOV is 35.4 °.
Embodiment three
In present embodiment, the optical imaging lens include first set gradually from the object side to image side along same optical axis
Lens 10, diaphragm 20, the second lens 30, optical filter 40 and imaging surface 50, the structure charts of the optical imaging lens as shown in figure 8,
The curvature of field and distortion curve are as shown in figure 9, spherical aberration curve graph is as shown in Figure 10.
The design parameter reference table 3-1 of first lens 10, the second lens 30 and optical filter 40, the first lens 10 and second
The aspherical design parameter of lens 30 is as shown in table 3-2.Wherein, surface 0 indicates object, and surface 1 indicates the first lens 10
Object side surface, surface 2 indicate the first lens 10 image side surface, surface 3 indicate diaphragm 20, the object of 4 second lens 30 of surface
Side surface, surface 5 indicate that the image side surface of the second lens 30, surface 6 indicate that the object side surface of optical filter 40, surface 7 indicate filter
The image side surface of mating plate 40, surface 8 indicate imaging surface 50.
Table 3-1
Table 3-2
Specifically, f/TTL=1.14 in present embodiment meets 0.91<f/TTL<1.3 relational expression；
F1*f2/f=-2.559 meets -3.2<f1*f2/f<- 1.5 relational expression；
| d3-d2 |=0.127, meet | d3-d2 |<0.2 relational expression；
(d1+d4)/(d2+d3)=1.053 meets 0.8<(d1+d4)/(d2+d3)<2.1 relational expression；
C12*c21/c11=-0.216 meets -0.41<c12*c21/c11<- 0.15 relational expression；
(Nd1+Nd2)/Nd2=1.974 meets 1.83<(Nd1+Nd2)/Nd2<2.03 relational expression.
Further, in the present embodiment, the effective focal length f of optical imaging lens is 4.27mm, and f-number Fno is
2.11, field angle FOV is 33.2 °.
Embodiment four
In present embodiment, the optical imaging lens include first set gradually from the object side to image side along same optical axis
Lens 10, diaphragm 20, the second lens 30, optical filter 40 and imaging surface 50, the structure chart of the optical imaging lens is as shown in figure 11,
The curvature of field and distortion curve are as shown in figure 12, and spherical aberration curve graph is as shown in figure 13.
The design parameter reference table 4-1 of first lens 10, the second lens 30 and optical filter 40, the first lens 10 and second
The aspherical design parameter of lens 30 is as shown in table 4-2.Wherein, surface 0 indicates object, and surface 1 indicates the first lens 10
Object side surface, surface 2 indicate the first lens 10 image side surface, surface 3 indicate diaphragm 20, the object of 4 second lens 30 of surface
Side surface, surface 5 indicate that the image side surface of the second lens 30, surface 6 indicate that the object side surface of optical filter 40, surface 7 indicate filter
The image side surface of mating plate 40, surface 8 indicate imaging surface 50.
Table 4-1
Table 4-2
Specifically, f/TTL=1.190 in present embodiment meets 0.91<f/TTL<1.3 relational expression；
F1*f2/f=-1.83 meets -3.2<f1*f2/f<- 1.5 relational expression；
| d3-d2 |=0.239, meet | d3-d2 |<0.2 relational expression；
(d1+d4)/(d2+d3)=1.053 meets 0.8<(d1+d4)/(d2+d3)<2.1 relational expression；
C12*c21/c11=-0.221 meets -0.41<c12*c21/c11<- 0.15 relational expression；
(Nd1+Nd2)/Nd2=1.982 meets 1.83<(Nd1+Nd2)/Nd2<2.03 relational expression.
Further, in the present embodiment, the effective focal length f of optical imaging lens is 4.46mm, and f-number Fno is
1.96, field angle FOV is 31.7 °.
Embodiment five
In present embodiment, the optical imaging lens include first set gradually from the object side to image side along same optical axis
Lens 10, diaphragm 20, the second lens 30, optical filter 40 and imaging surface 50, the structure chart of the optical imaging lens is as shown in figure 14,
The curvature of field and distortion curve are as shown in figure 15, and spherical aberration curve graph is as shown in figure 16.
The design parameter reference table 5-1 of first lens 10, the second lens 30 and optical filter 40, the first lens 10 and second
The aspherical design parameter of lens 30 is as shown in table 5-2.Wherein, surface 0 indicates object, and surface 1 indicates the first lens 10
Object side surface, surface 2 indicate the first lens 10 image side surface, surface 3 indicate diaphragm 20, the object of 4 second lens 30 of surface
Side surface, surface 5 indicate that the image side surface of the second lens 30, surface 6 indicate that the object side surface of optical filter 40, surface 7 indicate filter
The image side surface of mating plate 40, surface 8 indicate imaging surface 50.
Table 5-1
Table 5-2
Specifically, f/TTL=1.064 in present embodiment meets 0.91<f/TTL<1.3 relational expression；
F1*f2/f=-2.611 meets -3.2<f1*f2/f<- 1.5 relational expression；
| d3-d2 |=0.031, meet | d3-d2 |<0.2 relational expression；
(d1+d4)/(d2+d3)=1.12 meets 0.8<(d1+d4)/(d2+d3)<2.1 relational expression；
C12*c21/c11=-0.234 meets -0.41<c12*c21/c11<- 0.15 relational expression；
(Nd1+Nd2)/Nd2=2.018 meets 1.83<(Nd1+Nd2)/Nd2<2.03 relational expression.
Further, in the present embodiment, the effective focal length f of optical imaging lens is 3.81mm, and f-number Fno is
2.2, field angle FOV is 36 °.
The distortion of optical imaging lens disclosed in the above embodiments of the present application, the curvature of field and spherical aberration are smaller, and imaging picture loses
Very small, clarity is high, and stereovision is abundant, therefore, can significantly improve image quality.
It is understood that be directed to optical imaging lens disclosed in the above embodiments of the present application, the application is also with opening
The concrete application of optical imaging lens in one, specifically, disclosed herein as well is a kind of electricity using the optical imaging lens
Sub- equipment, the electronic equipment may include optical imaging lens disclosed in the above-mentioned any one embodiment of the application.Wherein, described
Electronic equipment can be specially that mobile phone, plate, laptop, camera, video camera, video monitor etc. support authentication skill
The electronic product equipment of art.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.To the upper of the disclosed embodiments
It states bright, enables those skilled in the art to implement or use the present invention.To the modifications of these embodiments to this field
It will be apparent for professional technician, the general principles defined herein can not depart from spirit of the invention
Or in the case where range, realize in other embodiments.Therefore, the present invention is not intended to be limited to these implementations shown in this article
Example, and it is to fit to the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. a kind of optical imaging lens, which is characterized in that first including setting gradually from the object side to image side along same optical axis is saturating
Mirror, diaphragm and the second lens；
First lens have positive light coke, and object side is convex surface；
Second lens have negative power, and image side surface is convex surface；
The optical imaging lens meet following relational expression：
0.91<f/TTL<1.3；-3.2mm<f1*f2/f<-1.5mm；|d3-d2|<0.2mm；0.8<(d1+d4)/(d2+d3)<
2.1；
Wherein, TTL is the overall length of the optical imaging lens, and f is the effective focal length of the optical imaging lens, and f1 is described the
The focal length of one lens, f2 are the focal length of second lens, and d2 is first lens image side surface vertices to diaphragm central point
Distance, d3 be the diaphragm central point arrive the second lens object side surface vertex distance, d1 for first lens in
Thickness on optical axis, d4 are second lens in the thickness on optical axis.
2. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens also meet relationship
Formula：-0.41mm-1<c12*c21/c11<-0.15mm-1；
Wherein, c11 is the curvature of the first lens object side surface, and c12 is the curvature on first lens image side surface, c21
For the curvature of the second lens object side surface.
3. optical imaging lens according to claim 2, which is characterized in that the optical imaging lens also meet relationship
Formula：1.83<(Nd1+Nd2)/Nd2<2.03；
Wherein, Nd1 is the material refractive index of first lens, and Nd2 is the material refractive index of second lens.
4. described in any item optical imaging lens according to claim 1~3, which is characterized in that the optical imaging lens are also
Meet relational expression：Fno<2.5；
Wherein, Fno is the f-number of the optical imaging lens.
5. optical imaging lens according to claim 4, which is characterized in that the optical imaging lens also meet relationship
Formula：26°<FOV<36°；
Wherein, FOV is the field angle of the optical imaging lens.
6. optical imaging lens according to claim 5, which is characterized in that the optical imaging lens also meet relationship
Formula：TTL<3.85mm.
7. optical imaging lens according to claim 1, which is characterized in that the optical imaging lens further include being located at institute
State the optical filter of the image side of the second lens.
8. a kind of electronic equipment, which is characterized in that including optical imaging lens and image sensing chip, the optical imaging lens
For the described in any item optical imaging lens of claim 1~7, the imaging surface of described image induction chip be located at the optics at
As the image side of camera lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510819584.XA CN105301740B (en) | 2015-11-23 | 2015-11-23 | The electronic equipment of optical imaging lens and the application optical imaging lens |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510819584.XA CN105301740B (en) | 2015-11-23 | 2015-11-23 | The electronic equipment of optical imaging lens and the application optical imaging lens |
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| Publication Number | Publication Date |
|---|---|
| CN105301740A CN105301740A (en) | 2016-02-03 |
| CN105301740B true CN105301740B (en) | 2018-11-16 |
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| CN201510819584.XA Active CN105301740B (en) | 2015-11-23 | 2015-11-23 | The electronic equipment of optical imaging lens and the application optical imaging lens |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932886B (en) * | 2017-05-17 | 2022-06-14 | 浙江舜宇光学有限公司 | Iris lens |
| CN112415726B (en) * | 2020-12-02 | 2022-05-13 | 山东理工大学 | Iris image acquisition lens only composed of two aspheric lenses |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006337792A (en) * | 2005-06-03 | 2006-12-14 | Canon Inc | Optical scanner and image forming apparatus using the same |
| CN100394240C (en) * | 2005-06-20 | 2008-06-11 | 亚洲光学股份有限公司 | Minisize image acquisition lens |
| TWI411812B (en) * | 2006-03-31 | 2013-10-11 | Hitachi Maxell | Camera lens assembly |
| CN104698572A (en) * | 2014-12-25 | 2015-06-10 | 中国科学院长春光学精密机械与物理研究所 | Ultra-thin small-distortion wide-angle double-chip optical imaging objective lens |
| CN205176366U (en) * | 2015-11-23 | 2016-04-20 | 广东旭业光电科技股份有限公司 | Optical imaging camera lens and electronic equipment who uses this optical imaging camera lens |
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| Publication number | Publication date |
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| CN105301740A (en) | 2016-02-03 |
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Effective date of registration: 20190620 Address after: 554300 A, building 6, two phase of electricity supplier park, Tongren high tech Industrial Development Zone, Guizhou Patentee after: Guizhou Xu Ye photoelectric Co., Ltd. Address before: 523349 Second Road, Fulong Second Industrial Zone, Shipai Town, Dongguan City, Guangdong Province Patentee before: Guangdong Xu Ye Optoelectronics Technology incorporated company |