CN104204892A - Image capture lens, image capture device, and portable terminal - Google Patents
Image capture lens, image capture device, and portable terminal Download PDFInfo
- Publication number
- CN104204892A CN104204892A CN201380016399.6A CN201380016399A CN104204892A CN 104204892 A CN104204892 A CN 104204892A CN 201380016399 A CN201380016399 A CN 201380016399A CN 104204892 A CN104204892 A CN 104204892A
- Authority
- CN
- China
- Prior art keywords
- lens
- imaging lens
- lens system
- unit
- following conditional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G02B13/0035—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 three lenses
Abstract
Provided are an image capture lens with a three-layer configuration with which, in a bright lens which has an angle of field of 65 DEG or more and an F/stop of 3 or less, while having lower error sensitivity and better moldability, etc., than conventional types, all aberrations are corrected, as well as an image capture device and a portable terminal which employs same. An image capture lens is formed from, in order from the objective side, a first lens, an aperture iris, a second lens, and a third lens. The first lens is a positive lens with a convex objective-side face, the second lens is a positive meniscus lens with a concave objective-side face, and the third lens is a negative lens with an objective-side face which is concave near the optical axis, an inflection point within an effective radius, and an aspherical convex face near the periphery of the lens, whereby the following formulae are satisfied: -5.0 < r3/f < -0.4 (1), and 0.0 < f1/f2 < 5.0 (2), wherein r3 is the radius of curvature in mm of the second lens objective-side face, f is the focal length in mm of the total assembly, f1 is the focal length in mm of the first lens, and f2 is the focal length in mm of the second lens.
Description
Technical field
The present invention relates to imaging lens system and the camera head and the portable terminal device that have used imaging lens system that one has been suitable for using the camera head of the solid-state imager such as CCD (Charge Coupled Device: charge-coupled image sensor) type imageing sensor, CMOS (Complementary Metal Oxide Semiconductor: complementary metal oxide semiconductor (CMOS)) type imageing sensor.
Background technology
In recent years, along with having used high performance, the miniaturization of imaging apparatus of the solid-state imager such as CCD (Charge Coupled Device) type imageing sensor or CMOS (Complementary Metal Oxide Semiconductor) type imageing sensor, universal portable phone, the portable information terminal that possesses camera head.In addition, for the imaging lens system that is equipped on these camera heads, the requirement of further miniaturization, high performance uprises.Recently, in this portable terminal device, carry high pixel and high performance main camera and low pixel and small-sized this situation of two of secondary camera also many.
As the imaging lens system of main camera purposes, due to needs high performance, 3 imaging lens systems to 5 chip architectures are proposed.On the other hand, as secondary camera, up to the present the pixel count of VGA class is general and taking the imaging lens system of 1～2 chip architecture as main, but recently, along with high resolving power, the maximization of the image-displaying member in portable terminal device, secondary camera also advances high pixelation to 2M class, and the performance that requires of camera head is also uprised.Therefore, proposed to realize the imaging lens system of 3 chip architectures of high performance compared with 1～2 chip architecture.But if become 3 chip architectures, key element becomes many compared with 2 chip architectures, therefore because of foozle separately, to accumulate caused performance degradation remarkable, if not with the accurate manufacturing technique higher than the imaging lens system of 2 chip architectures, be difficult to realize high performance.Therefore, in the optical design of the imaging lens system of 3 chip architectures, require good design in the low and viewpoint in throughput rate of error-sensitivity.At this, as the imaging lens system of 3 chip architectures, the imaging lens system of known positive and negative structure as patent documentation 1,2.
Patent documentation 1: TOHKEMY 2004-326097 communique
Patent documentation 2: TOHKEMY 2007-322561 communique
Summary of the invention
The problem that invention will solve
But in the imaging lens system of recording at patent documentation 1, the curvature of the object side of the 2nd lens is excessively strong, therefore at described optical surface from optical axis bias time, produce large one-sided fuzzy.Thereby, need to manage accurately the bias producing between the optical axis of the 1st lens and the 2nd lens, in productivity, there is worry.In addition, similarly, the curvature of the object side of the 2nd lens is excessively strong for the imaging lens system that patent documentation 2 is recorded, therefore at described optical surface from optical axis bias time the axle that produces intelligent image poor large, in productivity, have worry.And in patent documentation 1, patent documentation 2 the two disclosed technology, in the time of the imaging lens system being made as in maximum image height 2mm, the thickness of lens is excessively thin, has the worry of forming lens difficulty.
The present invention completes in view of this problem, its object be to provide a kind of in field angle more than 65 °, F value be in wide-angle below 3 and bright lens compared with type in the past low the and formability etc. of error-sensitivity good in 3 chip architectures that are corrected of various aberrations imaging lens system and used camera head and the portable terminal device of this imaging lens system.
At this, as the yardstick of small-sized imaging lens system, in the present invention taking the miniaturization of rank that meets following formula as target.By meeting this scope, can realize the miniaturization and of camera head entirety.
TTL/2Y<1.10···(14)
Wherein, at this, refer to that as side focus the parallel rays parallel with optical axis incides the picture point in the situation of imaging lens system.In addition, in the case of imaging lens system by as the face of side and be to be made as the value of calculating above-mentioned L on the basis of air scaled distance as disposing between side focal position the parallel flat such as seal glass of optical low-pass filter, infrared intercepting filter or solid-state imager packaging body, establishing parallel flat part.In addition, the scope of following formula more preferably.
TTL/2Y<1.00···(14)’
For the scheme of dealing with problems
The 1st to invent the imaging lens system of recording be that the field angle of maximum image height is that 65 ° of above and F values are the imaging lens system below 3.0, and this imaging lens system is characterised in that,
Comprise successively the 1st lens, aperture diaphragm, the 2nd lens, the 3rd lens from object side,
Described the 1st lens are that object side is the positive lens of convex surface,
Described the 2nd lens are that object plane is the positive meniscus lens of concave surface,
Described the 3rd lens are to be following aspheric negative lens as side: being concave surface near optical axis and thering is flex point in effective diameter, be convex surface in lens perimeter,
Meet following conditional,
-5.0<r3/f<-0.4···(1)
0.0<f1/f2<5.0···(2)
Wherein,
R3: the radius-of-curvature (mm) of the object side of described the 2nd lens
F: the focal length (mm) of whole system
F1: the focal length (mm) of described the 1st lens
F2: the focal length (mm) of described the 2nd lens.
By make in the configuration of the most close object side convex surface towards the positive lens (thering are the lens of positive focal power) of object side as described the 1st lens, can make principal point position near object side, therefore can shorten lens total length.In addition, by described aperture diaphragm being disposed between described the 1st lens and described the 2nd lens, can take described the 1st lens and described the 2nd lens to approach symmetrical structure across described aperture diaphragm, therefore be conducive to aberration correction.
In addition, by configuration make concave surface towards the meniscus lens of object side as described the 2nd lens, can make to the angle of incidence of light of described the 2nd He Xiang side, lens object side littlely, therefore can suppress the generation of aberration.Be positive lens by further making described the 2nd lens, can share the positive focal power of being easily partial to described the 1st lens in the time that total length shortens with described the 2nd lens, also can make aberration correction good even if carry out wide-angleization.
In addition, near the negative lens (having the lens of negative focal power) that is made as concave surface by configuration the optical axis as side is as described the 3rd lens, can guarantee to a certain extent back focal length, be made as simultaneously and there is the aspheric surface that flex point and periphery are convex surface, thereby can make the heart characteristic far away of marginal ray good.
If want with 3 lens and exist the structure of aperture diaphragm realize the more than 65 ° wide-angle of maximum image height field angle and there is the little imaging lens system of lightness, optical full length below F3 between the 1st lens and the 2nd lens, need strong positive focal power at more close object side, and need to make the radius-of-curvature of optical surface of each lens large from reducing the viewpoint of error-sensitivity.Thereby, in the time that described the 1st lens and described the 2nd lens are considered as to a lens combination, this group need to have strong positive focal power, preferably shares this positive focal power by described the 1st lens and described the 2nd lens from the viewpoint of aberration correction, reduction error-sensitivity.Conditional (2) is described the 1st lens and the conditional of described the 2nd power of lens ratio, in the case of the value of conditional (2) is more stronger lower than the 1st power of lens described in lower limit, exist the eccentric error sensitivity of described the 1st lens to become the very high and worry of throughput rate variation.In addition, in the case of the value of conditional (2) is more stronger higher than the 2nd power of lens described in the upper limit, exist similarly the eccentric error sensitivity of described the 2nd lens to uprise and the worry of throughput rate variation.Therefore,, by the formula of satisfying condition (2), when suppressing the eccentric error sensitivity of described the 1st lens and described the 2nd lens, can also make functional as wide-angle and bright lens.
In addition, conditional (1) is the conditional of the regulation radius-of-curvature of object side of described the 2nd lens and the ratio of the focal length of whole system, and in the case of the value of conditional (1) is more less lower than lower limit radius-of-curvature, particularly in the bright lens below F3, light height is high compared with dark lens, light incides the larger lens perimeter portion of angle of lens face, and therefore eccentric error sensitivity uprises.In addition, in the case of the value of conditional (1) is more larger higher than upper limit radius-of-curvature, it is large that the incident angle of light diatropic plane becomes, and is difficult to suppress the poor generation that waits aberration of intelligent image.Thereby, by the formula of satisfying condition (1), can be made as the good lens of aberration correction in reducing eccentric error sensitivity.
The 2nd invents the imaging lens system of recording is characterised in that, invents in the invention of recording the 1st, meets following conditional,
-1.0<(r5+r6)/(r5-r6)<2.5···(3)
Wherein,
R5: the radius-of-curvature (mm) of the object side of described the 3rd lens
R6: the radius-of-curvature (mm) of the picture side of described the 3rd lens.
Conditional (3) is the conditional of the shape of described the 3rd lens of regulation.By making the value of conditional (3) higher than lower limit, can make lens near object side with respect to the principal point position of described the 3rd lens as negative lens, therefore easily guarantee back focal length.In addition, by making the value of conditional (3) lower than the upper limit, described the 3rd lens can not become makes the strong meniscus shape of convex surface towards object side, therefore can prevent that the long and optical full length of back focal length from becoming large.
The 3rd invents the imaging lens system of recording is characterised in that, invents in the invention of recording in the 1st invention or the 2nd, meets following conditional,
0.9<f1/f<1.2···(4)。
Conditional (4) is the conditional of regulation described the 1st power of lens and the ratio of the focal power of whole system.By making the value of conditional (4) higher than lower limit, can prevent from crossing the generation of strong caused high order aberration, the rising of eccentric error sensitivity because of described the 1st power of lens.In addition, by making the value of conditional (4) lower than the upper limit, approach the positive focal power grow of described the 1st lens of object side, optical full length, near object side, therefore can be shortened in the principal point position of whole system.
The 4th invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 3 invention, meets following conditional,
0.7<Ds/Y<1.2···(5)
Wherein,
Ds: the distance (mm) from described aperture diaphragm to image planes
Y: maximum image height (mm).
Conditional (5) is the distance of regulation from described aperture diaphragm to image planes and the conditional of the ratio of maximum image height.By making the value of conditional (5) higher than lower limit, make described aperture diaphragm make to penetrate pupil location near object side away from image planes with respect to maximum image height, can make disposition far away good.In addition, by making the value of conditional (5) lower than the upper limit, suppress described aperture diaphragm too away from image planes, can prevent that optical full length from becoming large.
The 5th invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 4 invention, meets following conditional,
0.15<d1/TTL<0.3···(6)
Wherein,
D1: the core thick (mm) of described the 1st lens
TTL: the total length (flat board is made as air and converts) of described imaging lens system (mm).
Conditional (6) be regulation optical full length with the axle of described the 1st lens on the conditional of ratio of thickness.
By making the value of conditional (6) higher than lower limit, can fully guarantee the thickness of described the 1st lens, be conducive to formability.In addition, by making the value of conditional (6) lower than the upper limit, can prevent that described the 1st lens are blocked up and be difficult to shorten optical full length.
The 6th invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 5 invention, meets following conditional,
-2.0<(r1+r2)/(r1-r2)<-0.6···(7)
Wherein,
R1: the radius-of-curvature (mm) of the object side of described the 1st lens
R2: the radius-of-curvature (mm) of the picture side of described the 1st lens.
Conditional (7) is the conditional of the shape of described the 1st lens of regulation.By making the value of conditional (7) higher than lower limit, can suppress the generation because of the poor grade of the too small caused intelligent image of radius-of-curvature of the He Xiang side, object side of described the 1st lens.In addition, by making the value of conditional (7) lower than the upper limit, optical full length, near object side, therefore can be shortened in the principal point position of described the 1st lens.
The 7th invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 6 invention, meets following conditional,
-2.0<r3/f<-0.4···(8)。
Conditional (8) is the preferred scope of the ratio of the object side radius-of-curvature of the 2nd lens and the focal length of whole system, by meeting this conditional, can make the balance of eccentric error sensitivity and aberration correction better.
The 8th invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 7 invention, meets following conditional,
0.7<f1/f2<2.3···(9)。
Conditional (9) is the 1st lens and the preferred scope of the ratio of the focal length of the 2nd lens, and by meeting this conditional, the 1st lens become more suitable with the 2nd power of lens ratio, can reduce eccentric error sensitivity.
The 9th invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 8 invention, meets following conditional,
0.1<(r5+r6)/(r5-r6)<2.0···(10)。
Conditional (10) is the preferred scope of the 3rd lens shape, by meeting this conditional, can in more suitably keeping back focal length, optical full length be diminished.
The 10th invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 9 invention, meets following conditional,
45<v3<70···(11)
V3: the Abbe number of the 3rd lens.
Conditional (11) is the conditional of the Abbe number of described the 3rd lens of regulation.By making the value of conditional (11) higher than lower limit, can suppress the generation of the multiplying power chromatic aberation causing because of described the 3rd lens perimeter portion.In addition, by making the value of conditional (11) lower than the upper limit, be conducive to the correction of chromatic aberation on axle.
The 11st invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 10 invention, meets following conditional,
TTL/f<1.5···(12)。
Conditional (12) is regulation optical full length and the conditional of the ratio of focal length.By meeting this conditional, can be made as the imaging lens system that balance is good and optical full length is little of field angle and optical full length.
The 12nd invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 11 invention, meets following conditional,
D/TTL>1.5···(13)
Wherein,
D: entrance pupil diameter (mm).
Conditional (13) is regulation entrance pupil diameter and the conditional of the ratio of optical full length.By making the value of conditional (13) higher than lower limit, can guarantee suitable light quantity, can in maintaining the image clearly that noise is few, shorten total length.On the other hand, by making the value of conditional (13) lower than the upper limit, do not need to make entrance pupil diameter excessive, it is easy that the correction of various aberrations becomes.
The 13rd invents the imaging lens system of recording is characterised in that, in any invention recorded in the 1st invention the～the 12 invention, has the lens in fact without focal power.That is to say, the situation of having added the pseudo-lens in fact without focal power in the structure of the 1st invention is also in range of application of the present invention.
The 14th invents the camera head of recording is characterised in that, possesses any imaging lens system recorded in the 1st invention the～the 13 invention.
The 15th invents the portable terminal device of recording is characterised in that to possess the 14th and invent the camera head of recording.
According to the present invention, can provide a kind of in field angle more than 65 °, in the wide-angle of F value below 3 and bright lens compared with type in the past low and formability of error-sensitivity etc. good in 3 chip architectures that are corrected of various aberrations imaging lens system and used camera head and the portable terminal device of this imaging lens system.
Brief description of the drawings
Fig. 1 is the stereographic map of the related camera head LU of present embodiment.
Fig. 2 is the cut-open view that cuts off the backward direction of arrow observation of structure of Fig. 1 with arrow II-II line.
Fig. 3 is the figure that represents portable telephone T.
Fig. 4 is the cut-open view of the related imaging lens system of embodiment 1.
Fig. 5 is spherical aberration (a), astigmatism (b) and the distortion aberration (c) of the related imaging lens system of embodiment 1, the aberration diagram of meridian coma (d).
Fig. 6 is the cut-open view of the related imaging lens system of embodiment 2.
Fig. 7 is spherical aberration (a), astigmatism (b) and the distortion aberration (c) of the related imaging lens system of embodiment 2, the aberration diagram of meridian coma (d).
Fig. 8 is the cut-open view of the related imaging lens system of embodiment 3.
Fig. 9 is spherical aberration (a), astigmatism (b) and the distortion aberration (c) of the related imaging lens system of embodiment 3, the aberration diagram of meridian coma (d).
Figure 10 is the cut-open view of the related imaging lens system of embodiment 4.
Figure 11 is spherical aberration (a), astigmatism (b) and the distortion aberration (c) of the related imaging lens system of embodiment 4, the aberration diagram of meridian coma (d).
Figure 12 is the cut-open view of the related imaging lens system of embodiment 5.
Figure 13 is spherical aberration (a), astigmatism (b) and the distortion aberration (c) of the related imaging lens system of embodiment 5, the aberration diagram of meridian coma (d).
Figure 14 is the cut-open view of the related imaging lens system of embodiment 6.
Figure 15 is spherical aberration (a), astigmatism (b) and the distortion aberration (c) of the related imaging lens system of embodiment 6, the aberration diagram of meridian coma (d).
Figure 16 is the cut-open view of the related imaging lens system of embodiment 7.
Figure 17 is spherical aberration (a), astigmatism (b) and the distortion aberration (c) of the related imaging lens system of embodiment 7, the aberration diagram of meridian coma (d).
Figure 18 is the cut-open view of the related imaging lens system of embodiment 8.
Figure 19 is spherical aberration (a), astigmatism (b) and the distortion aberration (c) of the related imaging lens system of embodiment 8, the aberration diagram of meridian coma (d).
Figure 20 is the cut-open view of the related imaging lens system of embodiment 9.
Figure 21 is spherical aberration (a), astigmatism (b) and the distortion aberration (c) of the related imaging lens system of embodiment 9, the aberration diagram of meridian coma (d).
Description of reference numerals
B: action button; D1, D2: display frame; L1: the 1st lens; L2: the 2nd lens; L3: the 3rd lens; LN: imaging lens system; LU: camera head; Ape: aperture diaphragm; IM: imageing sensor; IMa: photoelectric conversion department; T: portable telephone.
Embodiment
Based on accompanying drawing, embodiments of the present invention are described below.Fig. 1 is the stereographic map of the related camera head LU of present embodiment, and Fig. 2 is the cut-open view that cuts off the backward direction of arrow observation of structure of Fig. 1 with arrow II-II line.As shown in Figure 2, camera head LU possesses: as the CMOS type imageing sensor IM of solid-state imager with photoelectric conversion department IMa; Shot object image is taken in the imaging lens system LN of photoelectric conversion department (sensitive surface) IMa of this imageing sensor IM; And the not shown outside terminal for connecting (electrode) that carries out the transmission reception of this electric signal, wherein, they form.
The field angle of maximum image height is that 65 ° of above and F values are that imaging lens system LN below 3.0 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 in order from object side (above among Fig. 2), the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.Lens can be both glass systems, can be also plastics.
Between the 1st lens L1 and the 2nd lens L2, dispose separator SP1, between the 2nd lens L2 and the 3rd lens L3, dispose separator SP2, between the 3rd lens L3 and IR cutoff filter F, dispose separator SP3.In addition it is against each other that, lens L1～L3 also can make flange part.Imaging lens system LN meets following formula.
-5.0<r3/f<-0.4···(1)
0.0<f1/f2<5.0···(2)
Wherein,
R3: the radius-of-curvature (mm) of the 2nd lens L2 object side
F: the focal length (mm) of whole system
F1: the focal length (mm) of the 1st lens L1
F2: the focal length (mm) of the 2nd lens L2
Imaging lens system LN is fixed on the interior week of framework BX.The lower end of framework BX and the substrate ST butt that keeps imageing sensor IM.
Imageing sensor IM is formed with the photoelectric conversion department IMa as light accepting part that disposes two-dimensionally pixel (components of photo-electric conversion) at the central portion of the plane of its sensitive side, and is connected with not shown signal processing circuit.Described signal processing circuit comprises and drives successively each pixel to obtain the driving circuit portion of signal charge, each signal charge is transformed to the A/D transformation component of digital signal and uses this digital signal to form the signal processing part etc. of image signal output.In addition, near the outer rim of the plane of the sensitive side of imageing sensor IM, dispose many pads (omitting diagram), be connected in imageing sensor IM via not shown wire.Imageing sensor IM will be transformed to picture signal of digital YUV signal etc. etc. from the signal charge of photoelectric conversion department IMa, output to the circuit of regulation via wire (not shown).At this, Y is luminance signal, and U (=R-Y) is red and colour difference signal luminance signal, and V (=B-Y) is colour difference signal blue and luminance signal.In addition, solid-state imager is not limited to above-mentioned cmos type imageing sensor, also can use other devices such as CCD.
Imageing sensor IM for example, is connected via outside terminal for connecting and external circuit (control circuit that the upper stage arrangement of the portable terminal device of camera head has is installed), can receive for driving the voltage of imageing sensor IM, the supply of clock signal from external circuit, digital YUV signal can be outputed to external circuit in addition.
Then, as an example of portable terminal device that possesses camera head, the outside drawing explanation portable telephone based on Fig. 3.In addition, (a) of Fig. 3 be folding portable telephone is opened and from inner side observe figure, (b) of Fig. 3 be folding portable telephone is opened and from outside observe figure.
In Fig. 3, in portable telephone T, the lower frame body 72 that possesses the upper frame body 71 as housing of display frame D1, D2 and possess action button B links via hinge 73.In the present embodiment, be arranged at the face side of upper frame body 71 for the main camera head MC of the landscape of photographing etc., the camera head LU that possesses the imaging lens system LN of above-mentioned wide-angle is arranged at the rear side of upper frame body 71 and on display frame D1.
About imaging lens system LN, can by camera head LU take as shown in Fig. 3 (a) just to the state of camera head LU under user's self the upper part of the body of portable telephone T dominated by hand.The portable telephone that this picture signal can be sent to the other side who is communicating by letter shows these users' image, and carries out common call, thereby can realize so-called visual telephone.In addition, portable telephone T is not limited to collapsible.
(embodiment)
Then, the embodiment that is suitable for above-mentioned embodiment is described.But the present invention is not limited to embodiment shown below.The implication following (except wavelength, the unit of length is mm) of the each symbol in embodiment.
FL: the focal length (mm) of imaging lens system whole system
BF: back focal length (mm) (wherein, containing the distance to paraxial image planes of covering glass)
Fno:F value
W: angle of half field-of view (゜)
Ymax: the length (mm) of the half of the shooting face diagonal length of solid-state imager
TL: (wherein, " as side focus " refers to that the parallel rays parallel with optical axis incides the picture point in the situation of imaging lens system for the distance on optical axis (mm) from the lens face of the most close object side of imaging lens system whole system to picture side focus.)
R: the radius-of-curvature (mm) of plane of refraction
D: interval above axle (mm)
Nd: the refractive index under the normal temperature of the d line of lens material
Vd: the Abbe number of lens material
STO: aperture diaphragm
In each embodiment, the face that records " * " after each numbering is the face with aspherical shape, about aspheric shape, using the summit of face as initial point, on optical axis direction, get X-axis, the height of the direction vertical with optical axis is made as to h, represent with following " formula 1 ".
[formula 1]
Wherein,
The asphericity coefficient of Ai:i time
R: radius-of-curvature
K: the constant of the cone.
In addition, after (comprising the lens data of table), for example, if for example, represent 10 power multiplier (2.5 × 10 with E or e (2.5e-002)
-02).In addition, the face of lens data numbering is to give successively taking the object side of the 1st lens as 1.In addition the unit that, establishes the numerical value of the expression length that embodiment records is all mm.
In addition, the implication of the paraxial radius-of-curvature of recording about claim and embodiment, under the scene of actual lens determining, can by by least square fitting near lens central authorities the approximate radius-of-curvature when measuring shape value of (the specifically middle sections in 10% with respect to lens external diameter) be considered as paraxial radius-of-curvature.In addition, in the case of for example having used the asphericity coefficient of 2 times, the radius-of-curvature of also having considered the asphericity coefficient of 2 times can be considered as to paraxial radius-of-curvature in the benchmark radius-of-curvature of aspheric surface definition.(showing for example as a reference, P41～42 of " レ Application ズ Let Meter method " (vertical Co., Ltd. that publishes altogether) with reference to Song Juji)
(embodiment 1)
Lens data in embodiment 1 shown in table 1.Fig. 4 is the cut-open view of the lens of embodiment 1.The imaging lens system of embodiment 1 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 successively from object side, the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.CG is the parallel flat of having imagined cover glass or IR cutoff filter, and IM is the shooting face of solid-state imager.
[table 1]
[embodiment 1]
Reference wavelength=587.56nm
Unit: mm
Asphericity coefficient
Fig. 5 is the aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c), meridian coma (d)) of embodiment 1.At this, in spherical aberration diagram and meridian coma figure, solid line represents d line, and dotted line represents the amount of spherical aberration with respect to g line, and in astigmatism figure, solid line represents sagittal surface, and dotted line represents meridian ellipse (following identical).
(embodiment 2)
Lens data in embodiment 2 shown in table 2.Fig. 6 is the cut-open view of the lens of embodiment 2.The imaging lens system of embodiment 2 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 successively from object side, the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.CG is the parallel flat of having imagined cover glass or IR cutoff filter, and IM is the shooting face of solid-state imager.
[table 2]
[embodiment 2]
Reference wavelength=587.56nm
Unit: mm
Asphericity coefficient
Fig. 7 is the aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c), meridian coma (d)) of embodiment 2.
(embodiment 3)
Lens data in embodiment 3 shown in table 3.Fig. 8 is the cut-open view of the lens of embodiment 3.The imaging lens system of embodiment 3 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 successively from object side, the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.CG is the parallel flat of having imagined cover glass or IR cutoff filter, and IM is the shooting face of solid-state imager.
[table 3]
[embodiment 3]
Reference wavelength=587.56nm
Unit: mm
Asphericity coefficient
Fig. 9 is the aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c), meridian coma (d)) of embodiment 3.
(embodiment 4)
Lens data in embodiment 4 shown in table 4.Figure 10 is the cut-open view of the lens of embodiment 4.The imaging lens system of embodiment 4 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 successively from object side, the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.CG is the parallel flat of having imagined cover glass or IR cutoff filter, and IM is the shooting face of solid-state imager.
[table 4]
[embodiment 4]
Reference wavelength=587.56nm
Unit: mm
Asphericity coefficient
Figure 11 is the aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c), meridian coma (d)) of embodiment 4.
(embodiment 5)
Lens data in embodiment 5 shown in table 5.Figure 12 is the cut-open view of the lens of embodiment 5.The imaging lens system of embodiment 5 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 successively from object side, the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.CG is the parallel flat of having imagined cover glass or IR cutoff filter, and IM is the shooting face of solid-state imager.
[table 5]
[embodiment 5]
Reference wavelength=587.56nm
Unit: mm
Asphericity coefficient
Figure 13 is the aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c), meridian coma (d)) of embodiment 5.
(embodiment 6)
Lens data in embodiment 6 shown in table 6.Figure 14 is the cut-open view of the lens of embodiment 6.The imaging lens system of embodiment 6 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 successively from object side, the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.CG is the parallel flat of having imagined cover glass or IR cutoff filter, and IM is the shooting face of solid-state imager.
[table 6]
[embodiment 6]
Reference wavelength=587.56nm
Unit: mm
Asphericity coefficient
Figure 15 is the aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c), meridian coma (d)) of embodiment 6.
(embodiment 7)
Lens data in embodiment 7 shown in table 7.Figure 16 is the cut-open view of the lens of embodiment 7.The imaging lens system of embodiment 7 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 successively from object side, the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.CG is the parallel flat of having imagined cover glass or IR cutoff filter, and IM is the shooting face of solid-state imager.
[table 7]
[embodiment 7]
Reference wavelength=587.56nm
Unit: mm
Asphericity coefficient
Figure 17 is the aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c), meridian coma (d)) of embodiment 7.
(embodiment 8)
Lens data in embodiment 8 shown in table 8.Figure 18 is the cut-open view of the lens of embodiment 8.The imaging lens system of embodiment 8 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 successively from object side, the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.CG is the parallel flat of having imagined cover glass or IR cutoff filter, and IM is the shooting face of solid-state imager.
[table 8]
[embodiment 8]
Reference wavelength=587.56nm
Unit: mm
Asphericity coefficient
Figure 19 is the aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c), meridian coma (d)) of embodiment 8.
(embodiment 9)
Lens data in embodiment 9 shown in table 9.Figure 20 is the cut-open view of the lens of embodiment 9.The imaging lens system of embodiment 9 comprises the 1st lens L1, aperture diaphragm S, the 2nd lens L2, the 3rd lens L3 successively from object side, the 1st lens L1 is that object side is the positive lens of convex surface, the 2nd lens L2 is that object plane is the positive meniscus lens of concave surface, the 3rd lens L3 is to be following aspheric negative lens as side: being concave surface near optical axis and having flex point in effective diameter, be convex surface in lens perimeter.CG is the parallel flat of having imagined cover glass or IR cutoff filter, and IM is the shooting face of solid-state imager.
[table 9]
[embodiment 9]
Reference wavelength=587.56nm
Unit: mm
Asphericity coefficient
Figure 21 is the aberration diagram (spherical aberration (a), astigmatism (b), distortion aberration (c), meridian coma (d)) of embodiment 9.
In table 10, gather the value that the embodiment corresponding with each conditional is shown.
[table 10]
In addition, the present invention is not limited to embodiment, the embodiment that instructions is recorded, and comprises other embodiment and variation, and embodiment, embodiment, the technological thought recorded according to this instructions are obvious to those skilled in the art.For example further add the situation of the pseudo-lens in fact without focal power also in range of application of the present invention.
Claims (15)
1. an imaging lens system, the field angle of the maximum image height of this imaging lens system is more than 65 °, and F value is below 3.0, this imaging lens system is characterised in that,
Comprise successively the 1st lens, aperture diaphragm, the 2nd lens, the 3rd lens from object side,
Described the 1st lens are that object side is the positive lens of convex surface,
Described the 2nd lens are that object plane is the positive meniscus lens of concave surface,
Described the 3rd lens are to be following aspheric negative lens as side: being concave surface near optical axis and thering is flex point in effective diameter, be convex surface in lens perimeter,
Meet following conditional,
-5.0<r3/f<-0.4···(1)
0.0<f1/f2<5.0···(2)
Wherein,
R3: the radius-of-curvature of the object side of described the 2nd lens, its unit is mm
F: the focal length of whole system, its unit is mm
F1: the focal length of described the 1st lens, its unit is mm
F2: the focal length of described the 2nd lens, its unit is mm.
2. imaging lens system according to claim 1, is characterized in that,
Meet following conditional,
-1.0<(r5+r6)/(r5-r6)<2.5···(3)
Wherein,
R5: the radius-of-curvature of the object side of described the 3rd lens, its unit is mm
R6: the radius-of-curvature of the picture side of described the 3rd lens, its unit is mm.
3. imaging lens system according to claim 1 and 2, is characterized in that,
Meet following conditional,
0.9<f1/f<1.2···(4)。
4. according to the imaging lens system described in any one in claim 1～3, it is characterized in that,
Meet following conditional,
0.7<Ds/Y<1.2···(5)
Wherein,
Ds: the distance from described aperture diaphragm to image planes, its unit is mm
Y: maximum image height, its unit is mm.
5. according to the imaging lens system described in any one in claim 1～4, it is characterized in that,
Meet following conditional,
0.15<d1/TTL<0.3···(6)
Wherein,
D1: the core of described the 1st lens is thick, its unit is mm
TTL: the total length of described imaging lens system, its middle plateform is made as air and converts, and its unit is mm.
6. according to the imaging lens system described in any one in claim 1～5, it is characterized in that,
Meet following conditional,
-2.0<(r1+r2)/(r1-r2)<-0.6···(7)
Wherein,
R1: the radius-of-curvature of the object side of described the 1st lens, its unit is mm
R2: the radius-of-curvature of the picture side of described the 1st lens, its unit is mm.
7. according to the imaging lens system described in any one in claim 1～6, it is characterized in that,
Meet following conditional,
-2.0<r3/f<-0.4···(8)。
8. according to the imaging lens system described in any one in claim 1～7, it is characterized in that,
Meet following conditional,
0.7<f1/f2<2.3···(9)。
9. according to the imaging lens system described in any one in claim 1～8, it is characterized in that,
Meet following conditional,
0.1<(r5+r6)/(r5-r6)<2.0···(10)。
10. according to the imaging lens system described in any one in claim 1～9, it is characterized in that,
Meet following conditional,
45<v3<70···(11)
V3: the Abbe number of the 3rd lens.
11. according to the imaging lens system described in any one in claim 1～10, it is characterized in that,
Meet following conditional,
TTL/f<1.5···(12)。
12. according to the imaging lens system described in any one in claim 1～11, it is characterized in that,
Meet following conditional,
D/TTL>1.5···(13)
Wherein
D: entrance pupil diameter, its unit is mm.
13. according to the imaging lens system described in any one in claim 1～12, it is characterized in that,
There are the lens in fact without focal power.
14. a camera head, is characterized in that, possesses the imaging lens system described in any one in claim 1～13.
15. 1 kinds of portable terminal devices, is characterized in that, possess the camera head described in claim 13.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-073037 | 2012-03-28 | ||
| JP2012073037 | 2012-03-28 | ||
| PCT/JP2013/054632 WO2013145989A1 (en) | 2012-03-28 | 2013-02-23 | Image capture lens, image capture device, and portable terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104204892A true CN104204892A (en) | 2014-12-10 |
Family
ID=49259269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380016399.6A Pending CN104204892A (en) | 2012-03-28 | 2013-02-23 | Image capture lens, image capture device, and portable terminal |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2013145989A1 (en) |
| CN (1) | CN104204892A (en) |
| WO (1) | WO2013145989A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570287B (en) * | 2014-12-17 | 2018-02-02 | 广东旭业光电科技股份有限公司 | The high pixel lens assembly of big wide-angle large aperture |
| CN104977699B (en) * | 2015-06-30 | 2017-08-01 | 瑞声声学科技(苏州)有限公司 | Pick-up lens |
| CN114911030A (en) * | 2021-02-09 | 2022-08-16 | 三营超精密光电(晋城)有限公司 | Optical imaging system, image capturing module and electronic device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003322792A (en) * | 2002-05-08 | 2003-11-14 | Fuji Photo Optical Co Ltd | Image pickup lens |
| JP2004226487A (en) * | 2003-01-20 | 2004-08-12 | Seiko Epson Corp | Imaging lens |
| JP2007206611A (en) * | 2006-02-06 | 2007-08-16 | Matsushita Electric Ind Co Ltd | Single focal imaging lens and imaging apparatus having the same |
| JP2009223251A (en) * | 2008-03-19 | 2009-10-01 | Olympus Corp | Image pickup apparatus |
| WO2010047178A1 (en) * | 2008-10-24 | 2010-04-29 | コニカミノルタオプト株式会社 | Imaging lens, imaging device, and portable terminal |
| WO2010079549A1 (en) * | 2009-01-12 | 2010-07-15 | ナルックス株式会社 | Image pickup lens system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3870907B2 (en) * | 2002-07-30 | 2007-01-24 | コニカミノルタオプト株式会社 | Imaging lens |
| JP4617744B2 (en) * | 2003-07-11 | 2011-01-26 | コニカミノルタオプト株式会社 | Imaging lens, imaging unit, and portable terminal including the imaging unit |
| JP5097086B2 (en) * | 2008-11-13 | 2012-12-12 | パナソニック株式会社 | Imaging optical system and imaging apparatus using the same |
-
2013
- 2013-02-23 JP JP2014507536A patent/JPWO2013145989A1/en active Pending
- 2013-02-23 WO PCT/JP2013/054632 patent/WO2013145989A1/en active Application Filing
- 2013-02-23 CN CN201380016399.6A patent/CN104204892A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003322792A (en) * | 2002-05-08 | 2003-11-14 | Fuji Photo Optical Co Ltd | Image pickup lens |
| JP2004226487A (en) * | 2003-01-20 | 2004-08-12 | Seiko Epson Corp | Imaging lens |
| JP2007206611A (en) * | 2006-02-06 | 2007-08-16 | Matsushita Electric Ind Co Ltd | Single focal imaging lens and imaging apparatus having the same |
| JP2009223251A (en) * | 2008-03-19 | 2009-10-01 | Olympus Corp | Image pickup apparatus |
| WO2010047178A1 (en) * | 2008-10-24 | 2010-04-29 | コニカミノルタオプト株式会社 | Imaging lens, imaging device, and portable terminal |
| WO2010079549A1 (en) * | 2009-01-12 | 2010-07-15 | ナルックス株式会社 | Image pickup lens system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013145989A1 (en) | 2013-10-03 |
| JPWO2013145989A1 (en) | 2015-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201278038Y (en) | Photographic lens and photographic device | |
| CN103064173B (en) | Imaging lens, imaging device and portable terminal | |
| CN103676093B (en) | Imaging lens, imaging device and massaging device | |
| US6885508B2 (en) | Image pickup lens, image pickup unit and cellphone terminal equipped therewith | |
| CN203941337U (en) | Pick-up lens and possess the camera head of pick-up lens | |
| US9310582B2 (en) | Image pick-up lens, image pick-up device, portable terminal and digital instrument | |
| CN100520476C (en) | Image pickup lens, image pickup apparatus and mobile terminal | |
| JP6425028B2 (en) | Imaging lens, lens unit, imaging device, digital still camera and portable terminal | |
| CN102356344B (en) | Zoom lens and image pickup device having the same | |
| EP2299306A1 (en) | Wide-angle optical system, and imaging device | |
| US8558939B2 (en) | Image pickup lens and image pickup apparatus | |
| KR101221703B1 (en) | Image pick-up lens, image pick-up unit and portable terminal | |
| CN109219766A (en) | Imaging optical system, lenticular unit and photographic device | |
| WO2004038478A1 (en) | Imaging lens | |
| CN113156611B (en) | Optical lens and imaging apparatus | |
| CN103502868A (en) | Imaging lens and imaging device provided with imaging lens | |
| CN102854610B (en) | Pick-up lens | |
| CN103513407B (en) | Zoom lens | |
| CN103403601B (en) | Imaging lens, imaging device, and portable terminal | |
| CN104204892A (en) | Image capture lens, image capture device, and portable terminal | |
| CN104169772A (en) | Imaging lens and imaging device | |
| CN104884990A (en) | Zoom lens and imaging device | |
| CN100439961C (en) | Imaging lens, imaging unit, and optical apparatus | |
| JP4248956B2 (en) | Imaging lens with 4 elements in 3 groups | |
| CN105044892A (en) | Zoom lens and zoom lens module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141210 |