CN104105992B - Image pickup lens - Google Patents
Image pickup lens Download PDFInfo
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- CN104105992B CN104105992B CN201380006226.6A CN201380006226A CN104105992B CN 104105992 B CN104105992 B CN 104105992B CN 201380006226 A CN201380006226 A CN 201380006226A CN 104105992 B CN104105992 B CN 104105992B
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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
- G02B13/22—Telecentric objectives or lens systems
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Abstract
This image pickup lens is configured of a positive first lens, a negative second lens, a positive third lens, and a negative fourth lens in this order from the object side. The object-side surface of the fourth lens is a concave surface or a flat surface, the image-side surface of the fourth lens is a concave surface, conditional expressions of 0.74≤f1≤2, and 0.22≤(r2A+r2B)/(r2A-r2B)≤1.0 (f1:focal point distance of the first lens, f:focal point distance of the whole image pickup lens system, r2A: curvature radius of the object-side surface of the second lens, r2B: curvature radius of the image-side surface of the second lens) are satisfied, and an image of the object is formed on an image pickup surface of an image pickup element.
Description
Technical field
The present invention relates to pick-up lens.More specifically, it is related to by imaging apparatus (such as CCD (Charge Coupled
Device：Charge-coupled image sensor) type imageing sensor, CMOS (Complementary Metal-Oxide
Semiconductor：Complementary metal oxide semiconductors (CMOS)) solid-state imager such as type imageing sensor) it is taken into the shadow of subject
The camera optical device of picture, the digital device with image input function being equipped with this device and the light in imaging apparatus
The small-sized pick-up lens of the optical image of subject is formed on face.
Background technology
In recent years, carry in portable terminal device and employ the solids such as CCD type imageing sensor, CMOS-type imageing sensor and take the photograph
The camera optical device of element, widely available with this portable terminal device, supply in market has risen to be equipped with to employ and has had
The imaging apparatus of high pixel count is to obtain the product of the camera optical device of the image of more high image quality.This has taking the photograph of high pixel count
Element is accompanied by and maximizes, but in recent years, the high refinement of pixel is developed, and imaging apparatus becomes miniaturization.With regard to
Pick-up lens used in the imaging apparatus that such height has refined, in order to the pixel having refined corresponding to height is it is desirable to high divides
Resolution.As the pick-up lens of such purposes, it is capable of high property according to the lens compared to 2 chip architectures or 3 chip architectures
The reasons why energyization is such is it is proposed that the pick-up lens of 4 chip architectures.
As the pick-up lens of this 4 chip architecture, it is for the purpose of high performance, so-called for example to Patent Document 1 discloses
The pick-up lens of inverse volume promise star type (inverted-Ernostar type), this pick-up lens starts to include successively from object side
1st lens with positive refracting power, the 2nd lens with negative refracting power, the 3rd lens with positive refracting power and tool
There are the 4th lens of positive refracting power.In addition, disclosing in such as patent document 2～4, (pick-up lens is complete with pick-up lens total length
The distance to the optical axis of image side focus for the lens face leaning on object side most of system) miniaturization for the purpose of, so-called long distance type
Pick-up lens, this pick-up lens starts to include having the 1st lens of positive refracting power successively, has negative refraction from object side
2nd lens of power, the 3rd lens with positive refracting power and the 4th lens with negative refracting power.
Patent document 1：Japanese Unexamined Patent Publication 2004-341013 publication
Patent document 2：Japanese Unexamined Patent Publication 2002-365530 publication
Patent document 3：Japanese Unexamined Patent Publication 2005-292559 publication
Patent document 4：Japanese Unexamined Patent Publication 2009-20182 publication
Content of the invention
But, the pick-up lens that above-mentioned patent document 1 is recorded is inverse volume promise star type, so the 4th lens are positive lens, phase
Than being the situation of negative lens in the 4th lens as long distance type, back focal length is elongated for image side for the principle point location of optical system.
That is, it is detrimental to the type minimizing.And then, the lens with negative refracting power in 4 lens are 1, Petzval sum
Correction is difficult, cannot guarantee good performance in image periphery.In addition, the pick-up lens that above-mentioned patent document 2 is recorded exists
Following problem：In addition to the photography angle of visual field is narrow, aberration correction is insufficient, if making lens total length shortening further, difficult
High pixelation with the caused imaging apparatus of the deterioration tackling performance.
In the pick-up lens that above-mentioned patent document 3 is recorded, it is that the periphery of the 4th lens significantly stretches out to image planes direction
Shape, thus in order to avoid and wave filter (for example optical LPF between the 4th lens and solid-state imager for the configuration
Device, infrared ray cut off filter etc.), parallel flat, the base of solid-state imager such as seal glass of solid-state imager encapsulation
The contact of plate etc., needs to make back focal length elongated.In fact, the pick-up lens that above-mentioned patent document 3 is recorded is despite long distance type, but
Back focal length length is it is impossible to realize sufficiently minimizing.In addition, as the reply of high pixelation, aberration correction is also insufficient.In patent literary composition
Offer in the pick-up lens of 4 records, be capable of F2.8 about aberration correction, but the portable terminal device of the high refinement development in pixel
In, only cope with insufficient lightness.
The present invention be in view of such problem and complete, although its object is to provide a kind of type than ever smaller
But that many aberrations are corrected well, F2.4 about 4 bright chip architectures pick-up lens.
To achieve these goals, the pick-up lens of the 1st invention is used for the shooting making shot object image image in imaging apparatus
Face is it is characterised in that start to include the 1st positive lens, the 2nd negative lens, the 3rd positive lens and object successively from object side
Side is concave surface or plane and image side surface is the 4th negative lens of concave surface, meets following conditional (A1) and (A2).
0.756≤f1/f≤2 …(A1)
0.22≤(r2A+r2B)/(r2A-r2B)≤1.0 …(A2)
Wherein,
f1：The focal length of the 1st lens,
f：The system-wide focal length of pick-up lens,
r2A：The radius of curvature of side of the object of the 2nd lens,
r2B：The radius of curvature of the image side surface of the 2nd lens.
The pick-up lens of the 2nd invention is characterised by, in above-mentioned 1st invention, meets following conditional (A3).
1.21≤(r3A+r3B)/(r3A-r3B)≤1.82 …(A3)
Wherein,
r3A：The radius of curvature of side of the object of the 3rd lens,
r3B：The radius of curvature of the image side surface of the 3rd lens.
The pick-up lens of the 3rd invention is characterised by, in above-mentioned 1st or the 2nd invention, meets following conditional
(A4).
0<(r4A+r4B)/(r4A-r4B)≤1 …(A4)
Wherein,
r4A：The radius of curvature of side of the object of the 4th lens,
r4B：The radius of curvature of the image side surface of the 4th lens.
The pick-up lens of the 4th invention is characterised by, in the above-mentioned 1st～the 3rd any one invention, below satisfaction
Conditional (A5).
0.2≤f3/f≤0.64 …(A5)
Wherein,
f3：The focal length of the 3rd lens,
f：The system-wide focal length of pick-up lens.
The pick-up lens of the 5th invention is characterised by, in the above-mentioned 1st～the 4th any one invention, the described 4th is saturating
The image side surface of mirror has aspherical shape, and the heart has negative refracting power wherein, and negative refracting power diminishes with towards periphery,
There is flex point, meet following conditional (A6).
0.05≤T4/f≤0.22 …(A6)
Wherein,
f：The system-wide focal length of pick-up lens,
T4：Thickness on the optical axis of the 4th lens.
The pick-up lens of the 6th invention is used for making shot object image image in the imaging surface of imaging apparatus it is characterised in that from thing
It is concave surface or plane that side starts to include the 1st positive lens, the 2nd negative lens, the 3rd positive lens and side of the object successively
And image side surface is the 4th negative lens of concave surface, meets following conditional (B1), (B2) and (B5).
-5≤f2/f≤-1.37 …(B1)
0.22≤(r2A+r2B)/(r2A-r2B)≤1.0 …(B2)
-1.83≤r3A/f≤-0.77 …(B5)
Wherein,
f2：The focal length of the 2nd lens,
f：The system-wide focal length of pick-up lens,
r2A：The radius of curvature of side of the object of the 2nd lens,
r2B：The radius of curvature of image side surface of the 2nd lens,
r3A：The radius of curvature of the side of the object of the 3rd lens.
The pick-up lens of the 7th invention is characterised by, in above-mentioned 6th invention, meets following conditional (B3).
1.35≤(r3A+r3B)/(r3A-r3B)≤1.98…(B3)
Wherein,
r3A：The radius of curvature of side of the object of the 3rd lens,
r3B：The radius of curvature of the image side surface of the 3rd lens.
The pick-up lens of the 8th invention is characterised by, in above-mentioned 6th or the 7th invention, meets following conditional
(B4).
0<(r4A+r4B)/(r4A-r4B)≤1…(B4)
Wherein,
r4A：The radius of curvature of side of the object of the 4th lens,
r4B：The radius of curvature of the image side surface of the 4th lens.
The pick-up lens of the 9th invention is characterised by, in the above-mentioned 6th～the 8th any one invention, the described 4th is saturating
The image side surface of mirror has aspherical shape, and the heart has negative refracting power wherein, and negative refracting power diminishes with towards periphery,
There is flex point, meet following conditional (B6).
0.05≤T4/f≤0.22 …(B6)
Wherein,
f：The system-wide focal length of pick-up lens,
T4：Thickness on the optical axis of the 4th lens.
The pick-up lens of the 10th invention is characterised by, in the above-mentioned 1st～the 9th any one invention, the described 1st is saturating
Mirror is biconvex lens.
The pick-up lens of the 11st invention is characterised by, in the above-mentioned 1st～the 10th any one invention, the described 3rd
Lens are to the convex meniscus shaped lens in image planes side.
The pick-up lens of the 12nd invention is characterised by, in the above-mentioned 1st～the 11st any one invention, lens are whole
It is molded of plastic material.
The camera optical device of the 13rd invention is characterised by possessing：What any one of the above-mentioned 1st～the 12nd was invented takes the photograph
As camera lens；And imaging apparatus, the optical image that imaging surface is formed is transformed to electric signal, with the shooting in described imaging apparatus
The mode forming the optical image of subject on face is provided with described pick-up lens.
The digital device of the 14th invention is characterised by, possesses the camera optical device of above-mentioned 13rd invention, thus attached
The still frame photography of subject, the function of at least one party in cartoon photographic are added.
The digital device of the 15th invention is characterised by, in above-mentioned 14th invention, digital device is portable terminal device.
By the structure using the present invention, although being capable of the smaller many aberrations of type than ever by school well
Just, F2.4 about the bright pick-up lens of 4 chip architectures and the camera optical device that possesses this pick-up lens.Separately
Outward, by the camera optical device using the present invention in the digital devices such as portable phone, portable information terminal, can be to numeral
Add to facility compact high performance image input function.
Brief description
Fig. 1 is the lens construction figure of the 1st embodiment (embodiment 1).
Fig. 2 is the aberration diagram of embodiment 1.
Fig. 3 is the lens construction figure of the 2nd embodiment (embodiment 2).
Fig. 4 is the aberration diagram of embodiment 2.
Fig. 5 is the lens construction figure of the 3rd embodiment (embodiment 3).
Fig. 6 is the aberration diagram of embodiment 3.
Fig. 7 is the lens construction figure of the 4th embodiment (embodiment 4).
Fig. 8 is the aberration diagram of embodiment 4.
Fig. 9 is the lens construction figure of the 5th embodiment (embodiment 5).
Figure 10 is the aberration diagram of embodiment 5.
Figure 11 is the lens construction figure of the 6th embodiment (embodiment 6).
Figure 12 is the aberration diagram of embodiment 6.
Figure 13 is the lens construction figure of the 7th embodiment (embodiment 7).
Figure 14 is the aberration diagram of embodiment 7.
Figure 15 is the lens construction figure of the 8th embodiment (embodiment 8).
Figure 16 is the aberration diagram of embodiment 8.
Figure 17 is the schematic diagram of the schematic configuration example of the digital device illustrating to be equipped with pick-up lens.
Symbol description
DU：Digital device；LU：Camera optical device；LN：Pick-up lens；L1～L4：1st～the 4th lens；ST：Aperture light
Late (aperture)；SR：Imaging apparatus；SS：Sensitive surface (imaging surface)；IM：Image planes (optical image)；AX：Optical axis；1：Signal processing part；
2：Control unit；3：Memory；4：Operating portion；5：Display part.
Specific embodiment
Hereinafter, illustrate that the camera lens of the present invention are first-class.The pick-up lens of the 1st type is used for making shot object image image in shooting
The imaging surface (photoelectric conversion department of such as solid-state imager) of element is it is characterised in that start just to include successively from object side
The 1st lens, the 2nd negative lens, the 3rd positive lens and side of the object be concave surface or plane and image side surface is concave surface
The 4th negative lens, meet following conditional (A1) and (A2).
0.756≤f1/f≤2 …(A1)
0.22≤(r2A+r2B)/(r2A-r2B)≤1.0 …(A2)
Wherein,
f1：The focal length of the 1st lens,
f：The system-wide focal length of pick-up lens,
r2A：The radius of curvature of side of the object of the 2nd lens,
r2B：The radius of curvature of the image side surface of the 2nd lens.
In order to obtain the pick-up lens that small-sized, bright and aberration is corrected better, the basic structure bag of the 1st type
Including the 1st positive lens, the 2nd negative lens, the 3rd positive lens and side of the object is concave surface or plane and image side surface is recessed
The 4th negative lens in face.This lens construction is followed successively by just saturating including the 1st lens, the 2nd lens and the 3rd lens from object side
Lens group and the 4th negative lens, are the configuration of so-called long distance type, so being the knot favourable to the miniaturization of pick-up lens total length
Structure.And then, by 2 in 4 chip architectures are set to negative lens, increase the face with disperse function and be easy to correct Petzval
With can obtain the pick-up lens that even picture periphery has all ensured that good imaging performance.In addition, passing through the 4th lens
Side of the object is set to concave surface or plane, and the periphery of the 4th lens significantly will not stretch out to image planes direction, it is possible to avoid and
Wave filter (for example optical low pass filter, infrared ray cut off filter between the 4th lens and solid-state imager for the configuration
Deng), the contact of parallel flat, the substrate of solid-state imager etc. such as seal glass of solid-state imager encapsulation, and can
Shorten back focal length, become the structure favourable to the shortening of pick-up lens total length.
Conditional (A1) is for by the focal length of the 1st lens is set as suitable scope, and is appropriately carried out imaging
The shortening of camera lens total length and the conditional of aberration correction.By the upper limit less than conditional (A1), it is prevented from the 1st lens
Positive focal power (focal power：With the amount of the definition reciprocal of focal length, referred to refracting power) become too small, it is capable of pick-up lens total length
Shortening.In addition, can suppress to incide the height of the light of the 2nd lens, even if so F value become clear in the case of, also easily
Chromatic aberation on correction spherical aberration, axle.On the other hand, by the lower limit higher than conditional (A1), it is prevented from the 1st lens
Focal power is extreme to become big, can suppress the spherical aberration of high order, the coma occurring in the 1st lens.Therefore, even if becoming bright
And beam diameter increases, as long as this structure is it is also possible to realize good aberration correction.
Conditional (A2) is the conditional for the face shape of the 2nd lens is set as suitable scope.By less than bar
The upper limit of part formula (A2), the curvature being prevented from the image side surface of the 2nd lens extreme becomes that strong (i.e. the absolute value of radius of curvature extremely becomes
Little), the spherical aberration of high order, the coma of image side surface generation can be suppressed.And then, it is in by making the focal length of the 1st lens
The scope of conditional (A1) is such that it is able to reduce the object to the 2nd lens of the light towards imaging apparatus periphery further
The incidence angle of side, can suppress coma, distortion aberration etc..On the other hand, by the lower limit higher than conditional (A2), energy
Enough radius of curvature moderately maintaining the image side surface of the 2nd lens, the correction of coma, curvature of the image, astigmatism, chromatic aberation etc. becomes
Obtain easily.And then, taken the photograph such that it is able to reduce direction further by the scope making the focal length of the 1st lens be in conditional (A1)
The incidence angle of the side of the object to the 2nd lens of the light of element central part, can suppress the generation of spherical aberration etc..
The structure of the feature according to above-mentioned 1st type, although be capable of the smaller many aberration quilts of type than ever
Correcting well, F2.4 about the bright pick-up lens of 4 chip architectures and the camera optical possessing this pick-up lens
Device.In addition, if using this camera optical device in the digital devices such as portable phone, portable information terminal, then being capable of pin
High performance image input function is added to digital facility compact, its densification, high performance, multifunction etc. can be made
Go out contribution.Hereinafter illustrate to obtain such effect well and realize higher optical property, miniaturization etc. for balance
Condition etc..
More desirable meet following conditional (A1a).
0.756≤f1/f≤1.63 …(A1a)
This conditional (A1a) is in the condition and range of described conditional (A1) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (A1a) such that it is able to increase the effect above further.
More desirable meet following conditional (A2a).
0.28≤(r2A+r2B)/(r2A-r2B)≤1.0 …(A2a)
This conditional (A2a) is in the condition and range of described conditional (A2) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (A2a) such that it is able to increase the effect above further.
Expect to meet following conditional (A3).
1.21≤(r3A+r3B)/(r3A-r3B)≤1.82 …(A3)
Wherein,
r3A：The radius of curvature of side of the object of the 3rd lens,
r3B：The radius of curvature of the image side surface of the 3rd lens.
Conditional (A3) is the conditional for the face shape of the 3rd lens is set as suitable scope.By less than bar
The upper limit of part formula (A3), is prevented from the extreme high order becoming by force, can suppressing image side surface generation of curvature of the image side surface of the 3rd lens
Spherical aberration, coma.On the other hand, by the lower limit higher than conditional (A3), the 3rd lens can moderately be maintained
The radius of curvature of side of the object, can reduce the incidence angle to side of the object of the light towards imaging apparatus periphery, so
Coma, distortion aberration etc. can be suppressed.
More desirable meet following conditional (A3a).
1.39≤(r3A+r3B)/(r3A-r3B)≤1.69 …(A3a)
This conditional (A3a) is in the condition and range of described conditional (A3) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (A3a) such that it is able to increase the effect above further.
Expect to meet following conditional (A4).
0 ＜ (r4A+r4B)/(r4A-r4B)≤1 ... (A4)
Wherein,
r4A：The radius of curvature of side of the object of the 4th lens,
r4B：The radius of curvature of the image side surface of the 4th lens.
Conditional (A4) is the conditional for the face shape of the 4th lens is set as suitable scope.By less than bar
The upper limit of part formula (A4), the periphery of the 4th lens significantly will not stretch out to image planes direction, it is possible to avoiding and configuring the 4th
Wave filter (for example optical low pass filter, infrared ray cut off filter etc.) between lens and solid-state imager, solid
The contact of parallel flat, the substrates of solid-state imager etc. such as the seal glass of imaging apparatus encapsulation, and burnt after can shortening
Away from being capable of the shortening of pick-up lens total length.On the other hand, by the lower limit higher than conditional (A4), it is prevented from the 4th
The curvature of the side of the object of lens is extreme become strong it can be ensured that the telecentric iris characteristic of the image side light beam of marginal ray.
More desirable meet following conditional (A4a).
0.49≤(r4A+r4B)/(r4A-r4B)≤1 …(A4a)
This conditional (A4a) is in the condition and range of described conditional (A4) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (A4a) such that it is able to increase the effect above further.
Expect to meet following conditional (A5).
0.2≤f3/f≤0.64 …(A5)
Wherein,
f3：The focal length of the 3rd lens,
f：The system-wide focal length of pick-up lens.
Conditional (A5) is for the focal length of the 3rd lens is set as suitable scope, thus realizing pick-up lens total length
Shortening and good aberration correction conditional.By the upper limit less than conditional (A5), just it is being prevented from the 3rd lens
Focal power becomes too small, is capable of the shortening of pick-up lens total length.In addition, just need not add more than required in the 1st lens
Focal power, so becoming the structure favourable to coma, distortion aberration etc..On the other hand, by higher than conditional (A5)
Lower limit, can suppress the spherical aberration of high order, the coma occurring in the 3rd lens.
More desirable meet following conditional (A5a).
0.37≤f3/f≤0.62 …(A5a)
This conditional (A5a) is in the condition and range of described conditional (A5) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (A5a) such that it is able to increase the effect above further.
The image side surface of described 4th lens has aspherical shape, and the heart has a negative refracting power wherein, negative refracting power with
And diminish towards periphery, there is flex point it is desirable to meet following conditional (A6).
0.05≤T4/f≤0.22 …(A6)
Wherein,
f：The system-wide focal length of pick-up lens,
T4：Thickness on the optical axis of the 4th lens.
By the image side surface of the 4th lens is set to before optical axis direction periphery and then negative refracting power diminishes and has
There is the aspherical shape of flex point it is easy to guarantee the telecentric iris characteristic of image side light beam.In addition, the image side surface of the 3rd lens need not be in lens
Periphery exceedingly reduces negative refracting power, can correct off-axis aberration well." flex point " refers to herein, in effective radius
The curve of lens profile shape in, the section of aspheric vertex of surface becomes on aspherical as the plane vertical with optical axis
Point.
Conditional (A6) is for thickness on the axle of the 4th lens is set as suitable scope, thus being appropriately carried out taking the photograph
Conditional as the image planes of camera lens.In the 4th lens, the refracting power at the refracting power of optical axis vicinity and periphery is compared to it
His lens are significantly different, so the impact to curvature of the image for the thickness is big on axle.By the upper limit less than conditional (A6), Neng Goufang
Only curvature of the image swung to side (over side).On the other hand, by the lower limit higher than conditional (A6), it is prevented from image planes
Deficient side (under side) is swung in bending.Therefore, by meeting conditional (A6), it is prevented from the image planes of pick-up lens excessively
Swing to side, owe side.
More desirable meet following conditional (A6a).
0.11≤T4/f≤0.19 …(A6a)
This conditional (A6a) is in the condition and range of described conditional (A6) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (A6a) such that it is able to increase the effect above further.
The pick-up lens of the 2nd type is used for imaging surface (the such as solid-state image pickup unit making shot object image image in imaging apparatus
The photoelectric conversion department of part) it is characterised in that from object side start to include successively the 1st positive lens, the 2nd negative lens, positive
3 lens and side of the object are concave surface or plane and image side surface is the 4th negative lens of concave surface, meet following conditional
(B1), (B2) and (B5).
-5≤f2/f≤-1.37 …(B1)
0.22≤(r2A+r2B)/(r2A-r2B)≤1.0 …(B2)
-1.83≤r3A/f≤-0.77 …(B5)
Wherein,
f2：The focal length of the 2nd lens,
f：The system-wide focal length of pick-up lens,
r2A：The radius of curvature of side of the object of the 2nd lens,
r2B：The radius of curvature of image side surface of the 2nd lens,
r3A：The radius of curvature of the side of the object of the 3rd lens.
In order to obtain the pick-up lens that small-sized, bright and aberration is corrected better, the basic structure bag of the 2nd type
Including the 1st positive lens, the 2nd negative lens, the 3rd positive lens and side of the object is concave surface or plane and image side surface is recessed
The 4th negative lens in face.This lens construction is followed successively by just saturating including the 1st lens, the 2nd lens and the 3rd lens from object side
Lens group and the 4th negative lens, become the configuration of so-called long distance type, so being that the miniaturization to pick-up lens total length is favourable
Structure.And then, by 2 in 4 chip architectures are set to negative lens, increase the face with disperse function and be easy to correct Petzval
With can obtain the pick-up lens that even picture periphery has all ensured that good imaging performance.In addition, passing through the 4th lens
Side of the object is set to concave surface or plane, and the periphery of the 4th lens significantly will not stretch out to image planes direction, it is possible to avoid and
Wave filter (for example optical low pass filter, infrared ray cut off filter between the 4th lens and solid-state imager for the configuration
Deng), the contact of parallel flat, the substrate of solid-state imager etc. such as seal glass of solid-state imager encapsulation, and can
Shorten back focal length, become the structure favourable to the shortening of pick-up lens total length.
Conditional (B1) is for the focal length of the 2nd lens is set as suitable scope, thus being appropriately carried out camera lens
The head shortening of total length and the conditional of aberration correction.If above the upper limit of conditional (B1), the then negative focal power of the 2nd lens
(focal power：With the amount of the definition reciprocal of focal length, referred to refracting power) become too much it is difficult to realize the shortening of pick-up lens total length
Change.In addition, spherical aberration, the coma of high order will occur in the 2nd lens.On the other hand, if being less than conditional (B1)
Lower limit, then the negative focal power of the 2nd lens become too small, the correction of Petzval sum becomes difficult, the imaging of picture periphery
Can will deteriorate.Therefore, if meeting conditional (B1), even if becoming bright, beam diameter increases it is also possible to it is good to realize
Aberration correction.
Conditional (B2) is the conditional for the face shape of the 2nd lens is set as suitable scope.By less than bar
The upper limit of part formula (B2), the curvature being prevented from the image side surface of the 2nd lens extreme becomes that strong (i.e. the absolute value of radius of curvature extremely becomes
Little), the spherical aberration of high order, the coma occurring in image side surface can be suppressed.And then, by making at the focal length of the 2nd lens
In the scope of conditional (B1), the effect above can be increased further.On the other hand, by the lower limit higher than conditional (B2),
The radius of curvature of the image side surface of the 2nd lens, the correction of coma, curvature of the image, astigmatism, chromatic aberation etc. can moderately be maintained
Become easy.And then, it is in the scope of conditional (B1) such that it is able to obtain even picture periphery by making the focal length of the 2nd lens
The all better imaging performance in portion.Conditional (B5) is for being set as suitably the radius of curvature of the side of the object of the 3rd lens
Scope conditional.By the upper limit less than conditional (B5), it is prevented from the radius of curvature of side of the object of the 3rd lens
Absolute value becomes too small, in the image side surface of the 2nd lens occur aberration, i.e. towards the aberration of the light of imaging apparatus periphery
The correction of (such as coma, multiplying power chromatic aberation) becomes easy.In addition, it can be avoided that for as the of the strong concave surface of curvature
The contact of the effective diameter vicinity of the image side surface of 2 lens, also favourable to the system-wide shortening of pick-up lens.On the other hand, lead to
Cross the lower limit higher than conditional (B5), can moderately maintain the radius of curvature of the side of the object of the 3rd lens, direction can be reduced
The incidence angle to side of the object of the light of imaging apparatus periphery, it is possible to occur in the side of the object of suppression the 3rd lens
Coma, distortion aberration etc..
The structure of the feature according to above-mentioned 2nd type, although be capable of the smaller many aberration quilts of type than ever
Correcting well, F2.4 about the bright pick-up lens of 4 chip architectures and the camera optical possessing this pick-up lens
Device.In addition, if using this camera optical device in the digital devices such as portable phone, portable information terminal, then being capable of pin
High performance image input function is added to digital facility compact, its densification, high performance, multifunction etc. can be made
Go out contribution.Hereinafter illustrate to obtain such effect well and realize higher optical property, miniaturization etc. for balance
Condition etc..
More desirable meet following conditional (B1a).
-3.98≤f2/f≤-1.39 …(B1a)
This conditional (B1a) is in the condition and range of described conditional (B1) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (B1a) such that it is able to increase the effect above further.
More desirable meet following conditional (B2a).
0.28≤(r2A+r2B)/(r2A-r2B)≤1.0 …(B2a)
This conditional (B2a) is in the condition and range of described conditional (B2) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (B2a) such that it is able to increase the effect above further.
More desirable meet following conditional (B5a).
-1.66≤r3A/f≤-0.98 …(B5a)
This conditional (B5a) is in the condition and range of described conditional (B5) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (B5a) such that it is able to increase the effect above further.
Expect to meet following conditional (B3).
1.35≤(r3A+r3B)/(r3A-r3B)≤1.98 …(B3)
Wherein,
r3A：The radius of curvature of side of the object of the 3rd lens,
r3B：The radius of curvature of the image side surface of the 3rd lens.
Conditional (B3) is the conditional for the face shape of the 3rd lens is set as suitable scope.By less than bar
The upper limit of part formula (B3), is prevented from the extreme height becoming by force, can suppressing generation in image side surface of curvature of the image side surface of the 3rd lens
Secondary spherical aberration, coma.On the other hand, by the lower limit higher than conditional (B3), the 3rd lens can moderately be maintained
Side of the object radius of curvature, the incidence angle to side of the object of the light towards imaging apparatus periphery, institute can be reduced
So that coma, distortion aberration etc. can be suppressed.
More desirable meet following conditional (B3a).
1.39≤(r3A+r3B)/(r3A-r3B)≤1.69 …(B3a)
This conditional (B3a) is in the condition and range of described conditional (B3) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (B3a) such that it is able to increase the effect above further.
Expect to meet following conditional (B4).
0 ＜ (r4A+r4B)/(r4A-r4B)≤1 ... (B4)
Wherein,
r4A：The radius of curvature of side of the object of the 4th lens,
r4B：The radius of curvature of the image side surface of the 4th lens.
Conditional (B4) is the conditional for the face shape of the 4th lens is set as suitable scope.By less than bar
The upper limit of part formula (B4), the periphery of the 4th lens significantly will not stretch out to image planes direction, it is possible to avoiding and configuring the 4th
Wave filter (for example optical low pass filter, infrared ray cut off filter etc.) between lens and solid-state imager, solid
The contact of parallel flat, the substrates of solid-state imager etc. such as the seal glass of imaging apparatus encapsulation, and burnt after can shortening
Away from being capable of the shortening of pick-up lens total length.On the other hand, by the lower limit higher than conditional (B4), it is prevented from the 4th
The curvature of the side of the object of lens is extreme become strong it can be ensured that the telecentric iris characteristic of the image side light beam of marginal ray.
More desirable meet following conditional (B4a).
0.49≤(r4A+r4B)/(r4A-r4B)≤1 …(B4a)
This conditional (B4a) is in the condition and range of described conditional (B4) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.Therefore, by preferably meeting conditional (B4a), the effect above can be increased further.
Expect that the image side surface of described 4th lens has aspherical shape, the heart has a negative refracting power wherein, negative refraction
Power diminishes with towards periphery, has flex point, and meets following conditional (B6).
0.05≤T4/f≤0.22 …(B6)
Wherein,
f：The system-wide focal length of pick-up lens,
T4：Thickness on the optical axis of the 4th lens.
By the image side surface of the 4th lens is set to before optical axis direction periphery and then negative refracting power diminishes and has
There is the aspherical shape of flex point it is easy to guarantee the telecentric iris characteristic of image side light beam.In addition, the image side surface of the 3rd lens need not be in lens
Periphery exceedingly reduces negative refracting power, can correct off-axis aberration well." flex point " refers to herein, in effective radius
The curve of lens profile shape in, the section of aspheric vertex of surface becomes on aspherical as the plane vertical with optical axis
Point.
Conditional (B6) is for thickness on the axle of the 4th lens is set as suitable scope, thus being appropriately carried out taking the photograph
Conditional as the image planes of camera lens.In the 4th lens, the refracting power at the refracting power of optical axis vicinity and periphery is compared to it
His lens are significantly different, so thickness is big for the impact of curvature of the image on axle.By the upper limit less than conditional (B6), can
Prevent curvature of the image from swinging to side.On the other hand, by the lower limit higher than conditional (B6), be prevented from curvature of the image swing to deficient
Side.Therefore, by meeting conditional (B6), the image planes being prevented from pick-up lens were excessively swung to side, were owed side.
More desirable meet following conditional (B6a).
0.11≤T4/f≤0.19 …(B6a)
This conditional (B6a) is in the condition and range of described conditional (B6) defined it is stipulated that based on above-mentioned viewpoint etc.
Preferred condition and range.It is therefore preferable that meeting conditional (B6a) such that it is able to increase the effect above further.
Next, following illustrate to obtain well for balance in the structure of the feature of described 1st or the 2nd type
The effect above and realize the condition of higher optical property, miniaturization etc., preferred mode etc..
Expect that described 1st lens are biconvex lens.For the shortening of total length, need to be kept as the focal power of the 1st lens
Larger.If make two sides share focal power distribution by the 1st lens are set to biconvex shape, it is prevented from the curvature pole of one side
End becomes strong.Thereby, it is possible to suppress the spherical aberration of high order, the generation of coma.
Expect that described 3rd lens are to the convex meniscus shaped lens in image planes side.By the 3rd lens are set to make convex surface facing picture
The falcate shape of surface side, can reduce the incidence angle to side of the object of the light towards imaging apparatus periphery.Thus, energy
Enough suppression coma, distortion aberrations etc..
Expect that lens are all molded of plastic material.I.e. it is desired to pick-up lens only has plastic lens as lens.In recent years
Come, for the purpose of the overall miniaturization of the camera optical device including solid-state imager, although developing is identical pixel
The solid-state imager of number, but pel spacing is little, the little solid-state imager of imaging surface size as a result.Towards such
The pick-up lens of the little solid-state imager of imaging surface size, needs to set comparatively short by system-wide focal length, so each lens
Radius of curvature, external diameter fairly small.Therefore, if compared with the glass lens being manufactured by troublesome attrition process, lead to
Cross and constitute whole lens with the plastic lens being manufactured by ejection formation, even the little lens of radius of curvature, external diameter it is also possible to
Produce in a large number at a low price.In addition, with regard to plastic lens, pressed temperature can be reduced, it is possible to the loss of suppression mould,
As a result, the replacing number of times of mould, maintenance times can be reduced, cost of implementation reduces.
The pick-up lens of the present invention is suitable as taking the photograph of the digital device with image input function (such as portable terminal device)
As camera lens, by combining it with imaging apparatus etc., the image being optically taken into subject can be constituted and be output as electric signal
Camera optical device.Camera optical device is still frame photography, the camera that used of cartoon photographic constituting subject
Main inscape Optical devices, for example, by from object (i.e. subject) side successively possess formed object optics
The pick-up lens of picture and constituting the imaging apparatus of electric signal is transformed to by the optical image that this pick-up lens is formed.In addition, it is logical
Cross in the way of the optical image in sensitive surface (i.e. imaging surface) the upper formation subject of imaging apparatus, configure knot as characterized above
The pick-up lens of structure, is capable of camera optical device that is small-sized, inexpensive and having high performance, possesses this camera optical dress
The digital device put.
As the example of the digital device with image input function, digital camera, video camera can be included, monitor and shine
The cameras such as camera, onboard camera, video telephone camera, and it is possible to include personal computer, portable terminal device
(such as portable phone, mobile computer etc. small-sized and can be portable information equipment terminal), they peripheral equipment (scanning
Instrument, printer etc.), in other digital devices etc. built-in or exterior camera.According to these examples, can not only make
Constitute camera with camera optical device, but also can be by camera optical device is carried come additional photograph to various equipment
Machine function.For instance, it is possible to constitute the digital devices with image input function such as the portable phone with camera.
In fig. 17, as an example of the digital device with image input function, illustrate to count with schematic section
The schematic configuration example of word equipment DU.The camera optical device LU being equipped on the digital device DU shown in Figure 17 is (i.e. being shot from object
Body) side starts to possess successively the pick-up lens LN (AX of optical image (image planes) IM forming object：Optical axis), parallel flat PT (takes the photograph
The cover glass of element SR；With optical filters such as the optical low pass filter configuring as needed, infrared cutoff filters
Deng quite) and the optical image IM being formed on sensitive surface (imaging surface) SS by pick-up lens LN is transformed to electric signal
Imaging apparatus SR.In the case that the digital device DU with image input function is constituted by this camera optical device LU, generally
Configure camera optical device LU in its body interior, but when realizing camera-enabled, can adopt and need corresponding mode.
For instance, it is possible to for the main body of digital device DU, the camera optical dress of handling freely or rotatably Component units
Put LU.
As described above, pick-up lens LN includes the single-focusing of the 1st～the 4th lens L1～L4 by from object side successively
4 chip architectures are constituted, and become the structure forming optical image IM on the sensitive surface SS of imaging apparatus SR.As imaging apparatus SR, make
With having the solid-state imagers such as CCD type imageing sensor, the CMOS-type imageing sensor of for example multiple pixels.Pick-up lens LN
It is provided in as the optical image IM that subject is formed on the sensitive surface SS of the photoelectric conversion department of imaging apparatus SR, so by taking the photograph
As the optical image IM that camera lens LN is formed is transformed to electric signal by imaging apparatus SR.
Digital device DU, in addition to camera optical device LU, is also equipped with signal processing part 1, control unit 2, memory 3, behaviour
Make portion 4, display part 5 etc..In signal processing part 1, as needed the signal being generated by imaging apparatus SR is implemented with the number of regulation
Word image procossing, image Compression etc., and memory 3 (semiconductor memory, CD is recorded as digital image signal
Deng) in, according to circumstances, via cable or be transformed to infrared signal etc. and be sent to other equipment (such as portable phone
Communication function).Control unit 2 is made up of microcomputer, and (still frame camera function, animation are taken the photograph intensively to carry out camera function
Shadow function etc.), the control of function such as image regeneration function, the control of lens moving mechanism etc. for focusing.For example, by control
Portion 2 processed carries out the control for camera optical device LU, photographed with the still frame carrying out subject, in cartoon photographic at least
One side.Display part 5 is the part of the display such as including LCD monitor, using by imaging apparatus SR convert after picture signal or
Image information in memory 3 for person's record carries out image and shows.Operating portion 4 be including operation button (such as release button),
The part of the functional units such as operation dial (such as photograph mode driver plate), operator is operated the information transmission that have input to control
Portion 2.
Next, enumerating the 1st～the 8th embodiment, illustrate in greater detail the specific optical texture of pick-up lens LN.?
Fig. 1, Fig. 3, Fig. 5, Fig. 7, Fig. 9, Figure 11, Figure 13, Tu15Zhong, are shown respectively with optical cross-sectional and are in taking the photograph of infinity focusing state
The the 1st～the 8th embodiment as camera lens LN.Jth lens Lj is the lens positioned at j-th position from object side, with regard to configuration
In the image side of pick-up lens LN parallel flat PT it is contemplated to optical low pass filter, IR cut-off filter, solid-state image pickup unit
Seal glass of part etc..The whole lens faces constituting pick-up lens LN are aspherical, with regard to whole lens, plastic material are envisioned
For optical material.Additionally, it is contemplated that overall focusing, the focusing of this entirety makes the 1st lens L1 to the 4th lens L4 integratedly move
Focusing in row auto-focusing, microspur handoff functionality etc..
In the pick-up lens LN of the 1st～the 8th embodiment, from the beginning of object side, according to the 1st positive lens L1, negative
2nd lens L2, being arranged in order of the 3rd positive lens L3 and the 4th negative lens L4.Wherein, the 4th lens L4 is set to object side
Face is concave surface or plane and image side surface is concave surface.In addition, the image side surface of the 4th lens becomes with aspherical shape, at it
Center have negative refracting power, negative refracting power with the flex point that diminishes towards periphery, has structure.
But, with regard to plastic material, variations in refractive index during temperature change is big, if so constituted all with plastic lens
Lens, then there are the following problems：Around during temperature change, pick-up lens system-wide image point position changes.But, recently
Recognizing, if mixing inorganic particles in a plastic material, affecting of the temperature change that plastic material is subject to can be reduced.As
Fruit describes in detail, typically in transparent plastic material during hybrid fine particles, produces the scattering of light and decrease in transmission, so being difficult to
As optical material, but if making the size of particulate less than the wavelength through light beam, then substantially it is prevented from scattering.
In addition, though plastic material is because temperature rises, and refractive index reduces, but with regard to inorganic particulate, if temperature rises
Then refractive index rises.Therefore, acted in the way of cancelling out each other by using these temperature dependency, can accomplish hardly
Produce variations in refractive index.Specifically, by disperseing maximum length to be less than 20 nanometers in the plastic material as mother metal
Inorganic particulate, can be set to the extremely low plastic material of the temperature dependency of refractive index.For example, by dividing in acrylic resin
Scattered niobium oxide (Nb2O5) particulate, the variations in refractive index caused by temperature change can be reduced.
By in the pick-up lens LN of the present invention using refracting power than larger positive lens (i.e. the 1st lens L1, the 3rd saturating
Mirror L3) or in whole lens (the 1st～the 4th lens L1～L4) using such plastic material having disperseed inorganic particulate,
Image point position during system-wide for pick-up lens LN temperature change can be changed suppresses less.
In the respective embodiments described above, aftermentioned each embodiment, incide the master of the light beam of the imaging surface of solid-state imager
Angle of incidence of light, may not become fully little design in imaging surface periphery.But, in nearest technology, by again
On the colour filter of research solid-state imager, piece, the arrangement of microlens array, can mitigate shadow (Shading).Specifically,
If the pel spacing of the imaging surface of relative imaging apparatus, the spacing of the arrangement of microlens array on colour filter, piece is set to
A little bit smaller, then closer to the periphery of imaging surface, for each pixel, on colour filter, piece, microlens array is got over to pick-up lens light
Axle side offsets, it is possible to the light beam of oblique incidence is efficiently guided into the light accepting part of each pixel.Thereby, it is possible to by solid-state image pickup
The shadow occurring in element suppresses less.In aftermentioned each embodiment, it is alleviated correspondingly with described requirement, becomes with less
Type turns to the design example of purpose.
Embodiment
Hereinafter, include construction data of embodiment etc., further illustrate the structure of the pick-up lens implementing the present invention
Deng.The embodiment 1～8 (EX1～8) herein including is and above-mentioned 1st～the 8th embodiment distinguishes corresponding Numerical implementation
Example, illustrates lens construction figure (Fig. 1, Fig. 3, Fig. 5, Fig. 7, Fig. 9, Figure 11, Figure 13, Figure 15) table respectively of the 1st～the 8th embodiment
Show lens profile shape, lens configuration of corresponding embodiment 1～8 etc..
In the construction data of each embodiment, as face data, start face numbering, curvature half are shown successively from the hurdle in left side
Footpath r (mm), axle d spaced above (mm) and d line (wavelength：587.56nm) the relevant refractive index nd Abbe number relevant with d line
Vd, effective radius (mm).The face that opposite numbering addition of * is aspherical, and its face shape is by using with vertex of surface as initial point
The orthogonal coordinate system (X, Y, Z) of local following formula (AS) definition.As aspherical surface data, asphericity coefficient etc. is shown.
In addition, in the aspherical surface data of each embodiment, the coefficient of unrecorded item is 0, with regard to total data E-n=× 10-n.
【Mathematical expression 1】
…(AS)
Wherein,
h：Height (the h in the relative vertical direction of X-axis (optical axis AX)2=Y2+Z2)、
X：The amount of recess (vertex of surface benchmark) in the optical axis AX direction at the position of height h,
R：Benchmark radius of curvature (suitable with radius of curvature r),
K：The constant of the cone,
Ai：The asphericity coefficient of i time.
As various data, the system-wide focal length of pick-up lens (f, mm), back focal length (fB, mm), No. F (F), shooting are shown
Diagonal line length (2Y ', the mm of imaging surface SS of element SR；Y’：Maximum image height), lens total length (TL, mm), angle of half field-of view
(ω, °), and then, focal length (f1, f2, f3, f4 of each lens L1～L4 are shown as simple lens data；mm).Wherein, make herein
Back focal length fB is the distance of the image side surface of parallel flat PT to image planes IM, and lens total length TL is lens foremost to image planes IM
Distance.In addition, table 1 illustrates the conditional respective value of each embodiment.
Fig. 2, Fig. 4, Fig. 6, Fig. 8, Figure 10, Figure 12, Figure 14, Figure 16 are the aberration diagrams of embodiment 1～8 (EX1～8), (A) table
Show that spherical aberration (mm), (B) represent that astigmatism (mm), (C) represent distortion aberration (%).In spherical aberration diagram (A), by near
The side-play amount in the optical axis AX direction that axle image planes rise, solid line represents the amount of spherical aberration for d line (wavelength 587.56nm), dotted line table
Show the amount of spherical aberration for g line (wavelength 435.84nm), the longitudinal axis represents the height of incidence to pupil with its maximum height mark
The value (i.e. relative to pupil height) of standard.In astigmatism figure (B), by the skew in the optical axis AX direction from paraxial image planes
Amount, dotted line M represents the meridianal image surface for d line, and solid line S represents the sagittal image surface for d line, the longitudinal axis represent image height (IMGHT,
Unit：mm).In distortion aberration figure (C), transverse axis represents the distortion for d line, and the longitudinal axis represents image height (IMGHT, unit：mm).
In addition, the maximum of image height IMG HT be equivalent to maximum image height Y ' in image planes IM (imaging surface SS of imaging apparatus SR diagonal
Long half).
The pick-up lens LN (Fig. 1) of embodiment 1 starts to include the 1st positive lens L1, the 2nd negative lens successively from object side
L2, the 3rd positive lens L3 and the 4th negative lens L4, lens face is entirely aspherical, and lens are entirely plastic lens,
It is configured with aperture diaphragm ST by object side.In the case of observing each lens with paraxial face shape, the 1st lens L1 is biconvex
Positive lens, the 2nd lens L2 is the negative lens of concave-concave, and the 3rd lens L3 is to the convex positive meniscus shaped lens in image side, and the 4th lens L4 is
The negative lens of concave-concave.
The pick-up lens LN (Fig. 3) of embodiment 2 starts to include the 1st positive lens L1, the 2nd negative lens successively from object side
L2, the 3rd positive lens L3 and the 4th negative lens L4, lens face is entirely aspherical, and lens are entirely plastic lens,
It is configured with aperture diaphragm ST by object side.In the case of observing each lens with paraxial face shape, the 1st lens L1 is biconvex
Positive lens, the 2nd lens L2 is the negative lens of concave-concave, and the 3rd lens L3 is to the convex positive meniscus shaped lens in image side, and the 4th lens L4 is
The negative lens of concave-concave.
The pick-up lens LN (Fig. 5) of embodiment 3 starts to include the 1st positive lens L1, the 2nd negative lens successively from object side
L2, the 3rd positive lens L3 and the 4th negative lens L4, lens face is entirely aspherical, and lens are entirely plastic lens, the 1st
It is configured with aperture diaphragm ST between lens L1 and the 2nd lens L2.In the case that each lens are observed with paraxial face shape, the 1st
Lens L1 is the positive lens of biconvex, and the 2nd lens L2 is the negative lens of concave-concave, and the 3rd lens L3 is saturating to the convex positive falcate in image side
Mirror, the 4th lens L4 is the negative lens of concave-concave.
The pick-up lens LN (Fig. 7) of embodiment 4 starts to include the 1st positive lens L1, the 2nd negative lens successively from object side
L2, the 3rd positive lens L3 and the 4th negative lens L4, lens face is entirely aspherical, and lens are entirely plastic lens,
It is configured with aperture diaphragm ST by object side.In the case of observing each lens with paraxial face shape, the 1st lens L1 is to object
The convex positive meniscus shaped lens in side, the 2nd lens L2 is the negative lens of concave-concave, and the 3rd lens L3 is the positive lens of biconvex, the 4th lens L4
It is the negative lens of concave-concave.
The pick-up lens LN (Fig. 9) of embodiment 5 starts to include the 1st positive lens L1, the 2nd negative lens successively from object side
L2, the 3rd positive lens L3 and the 4th negative lens L4, lens face is entirely aspherical, and lens are entirely plastic lens,
It is configured with aperture diaphragm ST by object side.In the case of observing each lens with paraxial face shape, the 1st lens L1 is biconvex
Positive lens, the 2nd lens L2 is the negative lens of concave-concave, and the 3rd lens L3 is to the convex positive meniscus shaped lens in image side, and the 4th lens L4 is
The negative lens of concave-concave.
The pick-up lens LN (Figure 11) of embodiment 6 starts to include successively the 1st positive lens L1, the negative the 2nd saturating from object side
Mirror L2, the 3rd positive lens L3 and the 4th negative lens L4, lens face is entirely aspherical, and lens are entirely plastic lens,
It is configured with aperture diaphragm ST by object side.In the case of observing each lens with paraxial face shape, the 1st lens L1 is biconvex
Positive lens, the 2nd lens L2 is the negative lens of plano-concave, and the 3rd lens L3 is to the convex positive meniscus shaped lens in image side, the 4th lens L4
It is the negative lens of plano-concave.
The pick-up lens LN (Figure 13) of embodiment 7 starts to include successively the 1st positive lens L1, the negative the 2nd saturating from object side
Mirror L2, the 3rd positive lens L3 and the 4th negative lens L4, lens face is entirely aspherical, and lens are entirely plastic lens,
It is configured with aperture diaphragm ST by object side.In the case of observing each lens with paraxial face shape, the 1st lens L1 is biconvex
Positive lens, the 2nd lens L2 is the negative lens of plano-concave, and the 3rd lens L3 is to the convex positive meniscus shaped lens in image side, the 4th lens L4
It is the negative lens of concave-concave.
The pick-up lens LN (Figure 15) of embodiment 8 starts to include successively the 1st positive lens L1, the negative the 2nd saturating from object side
Mirror L2, the 3rd positive lens L3 and the 4th negative lens L4, lens face is entirely aspherical, and lens are entirely plastic lens,
It is configured with aperture diaphragm ST by object side.In the case of observing each lens with paraxial face shape, the 1st lens L1 is biconvex
Positive lens, the 2nd lens L2 is the negative lens of concave-concave, and the 3rd lens L3 is to the convex positive meniscus shaped lens in image side, the 4th lens L4
It is the negative lens of plano-concave.
Embodiment 1
Unit：mm
Face data
Aspherical surface data
2nd face
K=-0.31222E+00
A4=-0.37443E-01
A6=-0.26284E+00
A8=0.67137E+00
A10=-0.14463E+01
3rd face
K=0.11871E+02
A4=-0.21463E+00
A6=0.21015E+00
A8=0.40988E+00
A10=-0.11846E+01
4th face
K=0.90000E+02
A4=-0.11651E+00
A6=0.14975E+00
A8=0.96194E+00
A10=-0.13716E+01
A12=0.38625E+00
5th face
K=-0.50524E+02
A4=0.25374E+00
A6=-0.14918E+00
A8=-0.29102E+00
A10=0.12938E+01
A12=-0.93373E+00
6th face
K=-0.90000E+02
A4=-0.79406E-01
A6=0.18218E+00
A8=-0.93110E-01
A10=-0.45259E-01
A12=0.41480E-01
7th face
K=-0.43117E+01
A4=-0.34376E+00
A6=0.56888E+00
A8=-0.58687E+00
A10=0.49568E+00
A12=-0.16319E+00
8th face
A4=-0.20399E+00
A6=0.34558E-01
A8=0.27936E-01
A10=0.81995E-04
A12=-0.40703E-02
A14=0.54777E-03
9th face
K=-0.59236E+01
A4=-0.13850E+00
A6=0.75471E-01
A8=-0.38649E-01
A10=0.13494E-01
A12=-0.27512E-02
A14=0.23232E-03
Various data
F=2.539mm
FB=0.42mm
F=2.35
2Y '=4.57mm
TL=3.34mm
ω=41.7 °
Simple lens data
Embodiment 2
Unit：mm
Face data
Aspherical surface data
2nd face
K=-0.19948E+00
A4=-0.12995E-01
A6=-0.14293E+00
A8=0.23654E+00
A10=-0.39195E+00
3rd face
K=-0.90000E+02
A4=-0.15510E+00
A6=0.85783E-01
A8=0.20108E+00
A10=-0.42579E+00
4th face
K=0.90000E+02
A4=0.19041E-02
A6=-0.17371E+00
A8=0.99022E+00
A10=-0.90213E+00
A12=0.94446E-01
5th face
K=-0.16060E-01
A4=0.12057E+00
A6=-0.23375E-01
A8=-0.26848E+00
A10=0.12017E+01
A12=-0.95442E+00
6th face
K=-0.41312E+02
A4=-0.17561E-01
A6=-0.15266E+00
A8=0.29806E+00
A10=-0.31964E+00
A12=0.13248E+00
7th face
K=-0.48643E+01
A4=-0.30483E+00
A6=0.50026E+00
A8=-0.61291E+00
A10=0.43873E+00
A12=-0.11189E+00
8th face
K=-0.14108E+00
A4=-0.20400E+00
A6=0.42329E-01
A8=0.26399E-01
A10=-0.61184E-02
A12=-0.16013E-02
A14=0.41103E-03
9th face
K=-0.61585E+01
A4=-0.14631E+00
A6=0.76525E-01
A8=-0.34041E-01
A10=0.97871E-02
A12=-0.17089E-02
A14=0.13459E-03
Various data
F=2.873mm
FB=0.43mm
F=2.4
2Y '=4.57mm
TL=3.56mm
ω=38.3 °
Simple lens data
Embodiment 3
Unit：mm
Face data
Aspherical surface data
1st face
K=-0.10191E+01
A4=0.67003E-04
A6=0.27325E-01
A8=-0.82860E-01
A10=-0.14573E+00
2nd face
K=-0.90000E+02
A4=0.27101E-01
A6=0.10721E+00
A8=-0.13818E+01
A10=0.17707E+01
4th face
K=-0.89998E+02
A4=0.35830E+00
A6=-0.41832E+00
A8=-0.83865E+00
A10=0.38458E+01
A12=-0.40922E+01
5th face
K=0.13926E+02
A4=0.34255E+00
A6=-0.45411E+00
A8=0.63632E+00
A10=-0.33169E+00
A12=0.50740E-02
6th face
K=-0.83533E+02
A4=-0.18939E+00
A6=-0.93614E-01
A8=0.45993E+00
A10=-0.72118E+00
A12=0.40067E+00
7th face
K=-0.49116E+01
A4=-0.44720E+00
A6=0.59673E+00
A8=-0.70379E+00
A10=0.48678E+00
A12=-0.12365E+00
8th face
K=-0.90000E+02
A4=-0.35561E+00
A6=0.21120E+00
A8=-0.10448E-01
A10=-0.24973E-01
A12=0.80008E-02
A14=-0.77097E-03
9th face
K=-0.64943E+01
A4=-0.17199E+00
A6=0.10928E+00
A8=-0.46377E-01
A10=0.11402E-01
A12=-0.14893E-02
A14=0.82355E-04
Various data
F=2.880mm
FB=0.31mm
F=2.4
2Y '=4.57mm
TL=3.62mm
ω=38.1 °
Simple lens data
Embodiment 4
Unit：mm
Face data
Aspherical surface data
2nd face
K=-0.19041E+00
A4=0.44067E-02
A6=-0.36970E+00
A8=0.12136E+01
A10=-0.24561E+01
3rd face
K=0.88058E+02
A4=-0.33193E+00
A6=0.79806E-01
A8=-0.15021E+01
A10=0.13150E+01
4th face
K=0.57360E+02
A4=-0.67398E+00
A6=-0.56410E-01
A8=0.11145E+01
A10=0.52723E+00
A12=-0.67281E+00
5th face
K=-0.54217E+01
A4=-0.45035E+00
A6=0.84871E-01
A8=0.52666E+00
A10=0.83892E+00
A12=-0.69248E+00
6th face
K=0.41624E+02
A4=0.12594E+00
A6=-0.24987E+00
A8=0.18788E+00
A10=-0.13173E-01
A12=-0.69164E-01
7th face
K=-0.41548E+01
A4=0.58676E-01
A6=0.19217E+00
A8=-0.11920E+00
A10=-0.14852E-01
A12=0.14710E-01
8th face
K=-0.90000E+02
A4=-0.24620E+00
A6=0.52973E-01
A8=0.69740E-01
A10=-0.37008E-01
A12=0.56586E-02
A14=-0.11428E-03
9th face
K=-0.55159E+01
A4=-0.15485E+00
A6=0.93010E-01
A8=-0.39980E-01
A10=0.10937E-01
A12=-0.17647E-02
A14=0.12511E-03
Various data
F=2.350mm
FB=0.29mm
F=2.22
2Y '=4.57mm
TL=3.08mm
ω=44.1 °
Simple lens data
Embodiment 5
Unit：mm
Face data
Aspherical surface data
2nd face
K=-0.62819E+00
A4=-0.31819E-01
A6=-0.13833E+00
A8=0.12209E+00
A10=-0.37678E+00
3rd face
K=-0.87978E+02
A4=-0.26423E+00
A6=0.15451E+00
A8=0.80924E-01
A10=-0.36282E+00
4th face
K=-0.60386E+02
A4=0.18892E-01
A6=-0.20654E+00
A8=0.10055E+01
A10=-0.95394E+00
A12=0.19354E+00
5th face
K=0.58593E-01
A4=0.11428E+00
A6=0.11867E-01
A8=-0.29064E+00
A10=0.11018E+01
A12=-0.85117E+00
6th face
K=-0.19535E+01
A4=0.40447E-01
A6=-0.16954E+00
A8=0.23036E+00
A10=-0.17730E+00
A12=0.74132E-01
7th face
K=-0.46437E+01
A4=-0.28013E+00
A6=0.45849E+00
A8=-0.57857E+00
A10=0.42189E+00
A12=-0.10823E+00
8th face
A4=-0.18605E+00
A6=0.42246E-01
A8=0.18968E-01
A10=-0.56270E-02
A12=-0.38737E-03
A14=0.15047E-03
9th face
K=-0.58877E+01
A4=-0.13828E+00
A6=0.75492E-01
A8=-0.32377E-01
A10=0.84017E-02
A12=-0.12764E-02
The various data of A14=0.87194E-04
F=2.873mm
FB=0.42mm
F=2.4
2Y '=4.57mm
TL=3.62mm
ω=38.2 °
Simple lens data
Embodiment 6
Unit：mm
Face data
Aspherical surface data
2nd face
K=-0.20033E+00
A4=-0.13050E-01
A6=-0.14301E+00
A8=0.23618E+00
A10=-0.39084E+00
3rd face
K=-0.90000E+02
A4=-0.15490E+00
A6=0.85499E-01
A8=0.20118E+00
A10=-0.42583E+00
4th face
K=0.90000E+02
A4=0.17133E-02
A6=-0.17347E+00
A8=0.98994E+00
A10=-0.90217E+00
A12=0.94612E-01
5th face
K=-0.66426E-03
A4=0.12070E+00
A6=-0.23507E-01
A8=-0.26832E+00
A10=0.12017E+01
A12=-0.95463E+00
6th face
K=-0.40794E+02
A4=-0.17757E-01
A6=-0.15264E+00
A8=0.29811E+00
A10=-0.31964E+00
A12=0.13221E+00
7th face
K=-0.48675E+01
A4=-0.30491E+00
A6=0.50026E+00
A8=-0.61286E+00
A10=0.43872E+00
A12=-0.11195E+00
8th face
K=-0.14087E+00
A4=-0.20424E+00
A6=0.42285E-01
A8=0.26399E-01
A10=-0.61126E-02
A12=-0.16013E-02
A14=0.41082E-03
9th face
K=-0.61499E+01
A4=-0.14643E+00
A6=0.76513E-01
A8=-0.34041E-01
A10=0.97873E-02
A12=-0.17089E-02
A14=0.13462E-03
Various data
F=2.873mm
FB=0.33mm
F=2.4
2Y '=4.57mm
TL=3.56mm
ω=38.3 °
Simple lens data
Embodiment 7
Unit：mm
Face data
Aspherical surface data
2nd face
K=-0.19624E+00
A4=-0.12512E-01
A6=-0.14448E+00
A8=0.23766E+00
A10=-0.38515E+00
3rd face
K=-0.90000E+02
A4=-0.15439E+00
A6=0.86265E-01
A8=0.19991E+00
A10=-0.42375E+00
4th face
K=-0.90000E+02
A4=0.20081E-02
A6=-0.17322E+00
A8=0.98966E+00
A10=-0.89849E+00
A12=0.84438E-01
5th face
K=-0.39851E-01
A4=0.12011E+00
A6=-0.23247E-01
A8=-0.26501E+00
A10=0.12011E+01
A12=-0.96044E+00
6th face
K=-0.45019E+02
A4=-0.20639E-01
A6=-0.15311E+00
A8=0.29893E+00
A10=-0.31839E+00
A12=0.13295E+00
7th face
K=-0.49340E+01
A4=-0.30680E+00
A6=0.49985E+00
A8=-0.61266E+00
A10=0.43897E+00
A12=-0.11179E+00
8th face
K=-0.90000E+02
A4=-0.20367E+00
A6=0.42267E-01
A8=0.26388E-01
A10=-0.61255E-02
A12=-0.16046E-02
A14=0.41308E-03
9th face
K=-0.62983E+01
A4=-0.14380E+00
A6=0.75639E-01
A8=-0.33934E-01
A10=0.98013E-02
A12=-0.17137E-02
A14=0.13467E-03
Various data
F=2.873mm
FB=0.42mm
F=2.4
2Y '=4.57mm
TL=3.56mm
ω=38.3 °
Simple lens data
Embodiment 8
Unit：mm
Face data
Aspherical surface data
2nd face
K=-0.18814E+00
A4=-0.12223E-01
A6=-0.14319E+00
A8=0.23718E+00
A10=-0.38726E+00
3rd face
K=-0.89998E+02
A4=-0.15463E+00
A6=0.86318E-01
A8=0.19996E+00
A10=-0.42430E+00
4th face
K=0.30413E+01
A4=0.20506E-02
A6=-0.17317E+00
A8=0.99047E+00
A10=-0.90113E+00
A12=0.88569E-01
5th face
K=-0.10203E-01
A4=0.11970E+00
A6=-0.22259E-01
A8=-0.26676E+00
A10=0.12018E+01
A12=-0.95538E+00
6th face
K=-0.45121E+02
A4=-0.20293E-01
A6=-0.15313E+00
A8=0.29877E+00
A10=-0.31913E+00
A12=0.13149E+00
7th face
K=-0.49523E+01
A4=-0.30576E+00
A6=0.50082E+00
A8=-0.61259E+00
A10=0.43865E+00
A12=-0.11228E+00
8th face
K=-0.90000E+02
A4=-0.20294E+00
A6=0.42638E-01
A8=0.26473E-01
A10=-0.63297E-02
A12=-0.15868E-02
A14=0.41960E-03
9th face
K=-0.62926E+01
A4=-0.14415E+00
A6=0.75792E-01
A8=-0.33989E-01
A10=0.97935E-02
A12=-0.17063E-02
A14=0.13386E-03
Various data
F=2.873mm
FB=0.42mm
F=2.4
2Y '=4.57mm
TL=3.56mm
ω=38.3 °
Simple lens data
【Table 1】
Claims (14)
1. a kind of pick-up lens, for make shot object image image in imaging apparatus imaging surface it is characterised in that
Start to include the 1st positive lens, the 2nd negative lens, the 3rd positive lens and side of the object successively to be recessed from object side
Face or plane and image side surface is the 4th negative lens of concave surface, meet following conditional (A1), (A2) and (A3),
0.756≤f1/f≤2...(A1)
0.22≤(r2A+r2B)/(r2A-r2B)≤1.0...(A2)
1.21≤(r3A+r3B)/(r3A-r3B)≤1.82...(A3)
Wherein,
f1：The focal length of the 1st lens,
f：The system-wide focal length of pick-up lens,
r2A：The radius of curvature of side of the object of the 2nd lens,
r2B：The radius of curvature of the image side surface of the 2nd lens
r3A：The radius of curvature of side of the object of the 3rd lens,
r3B：The radius of curvature of the image side surface of the 3rd lens.
2. pick-up lens according to claim 1 it is characterised in that
Meet following conditional (A4),
0 ＜ (r4A+r4B)/(r4A-r4B)≤1... (A4)
Wherein,
r4A：The radius of curvature of side of the object of the 4th lens,
r4B：The radius of curvature of the image side surface of the 4th lens.
3. pick-up lens according to claim 1 it is characterised in that
Meet following conditional (A5),
0.2≤f3/f≤0.64...(A5)
Wherein,
f3：The focal length of the 3rd lens,
f：The system-wide focal length of pick-up lens.
4. pick-up lens according to claim 1 it is characterised in that
The image side surface of described 4th lens has aspherical shape, and the heart has negative refracting power wherein, and negative refracting power is with court
Diminish to periphery, there is flex point, meet following conditional (A6),
0.05≤T4/f≤0.22...(A6)
Wherein,
f：The system-wide focal length of pick-up lens,
T4：Thickness on the optical axis of the 4th lens.
5. a kind of pick-up lens, for make shot object image image in imaging apparatus imaging surface it is characterised in that
Start to include the 1st positive lens, the 2nd negative lens, the 3rd positive lens and side of the object successively to be recessed from object side
Face or plane and image side surface is the 4th negative lens of concave surface, meet following conditional (B1), (B2) and (B5),
-5≤f2/f≤-1.37...(B1)
0.22≤(r2A+r2B)/(r2A-r2B)≤1.0...(B2)
-1.83≤r3A/f≤-0.77...(B5)
Wherein,
f2：The focal length of the 2nd lens,
f：The system-wide focal length of pick-up lens,
r2A：The radius of curvature of side of the object of the 2nd lens,
r2B：The radius of curvature of image side surface of the 2nd lens,
r3A：The radius of curvature of the side of the object of the 3rd lens.
6. pick-up lens according to claim 5 it is characterised in that
Meet following conditional (B3),
1.35≤(r3A+r3B)/(r3A-r3B)≤1.98...(B3)
Wherein,
r3A：The radius of curvature of side of the object of the 3rd lens,
r3B：The radius of curvature of the image side surface of the 3rd lens.
7. pick-up lens according to claim 5 it is characterised in that
Meet following conditional (B4),
0 ＜ (r4A+r4B)/(r4A-r4B)≤1... (B4)
Wherein,
r4A：The radius of curvature of side of the object of the 4th lens,
r4B：The radius of curvature of the image side surface of the 4th lens.
8. pick-up lens according to claim 5 it is characterised in that
The image side surface of described 4th lens has aspherical shape, and the heart has negative refracting power wherein, and negative refracting power is with court
Diminish to periphery, there is flex point, meet following conditional (B6),
0.05≤T4/f≤0.22...(B6)
Wherein,
f：The system-wide focal length of pick-up lens,
T4：Thickness on the optical axis of the 4th lens.
9. according to claim 1 or 5 pick-up lens it is characterised in that
Described 1st lens are biconvex lens.
10. according to claim 1 or 5 pick-up lens it is characterised in that
Described 3rd lens are to the convex meniscus shaped lens in image planes side.
11. according to claim 1 or 5 pick-up lens it is characterised in that
Lens are all molded of plastic material.
12. a kind of camera optical device is it is characterised in that possess：
Pick-up lens described in claim 1 or 5；And
Imaging apparatus, the optical image that will be formed in imaging surface is transformed to electric signal,
In the way of the optical image of subject to be formed on the imaging surface in described imaging apparatus, it is provided with described pick-up lens.
A kind of 13. digital devices it is characterised in that
Possesses the camera optical device described in claim 12, thus being attached the still frame photography of subject, animation is taken the photograph
The function of at least one party in shadow.
14. digital devices according to claim 13 it is characterised in that
Described digital device is portable terminal device.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-013206 | 2012-01-25 | ||
| JP2012-013203 | 2012-01-25 | ||
| JP2012013203 | 2012-01-25 | ||
| JP2012013206 | 2012-01-25 | ||
| PCT/JP2013/050159 WO2013111612A1 (en) | 2012-01-25 | 2013-01-09 | Image pickup lens |
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| Publication Number | Publication Date |
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| CN104105992A CN104105992A (en) | 2014-10-15 |
| CN104105992B true CN104105992B (en) | 2017-02-22 |
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| CN201380006226.6A Active CN104105992B (en) | 2012-01-25 | 2013-01-09 | Image pickup lens |
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| JP (1) | JPWO2013111612A1 (en) |
| CN (1) | CN104105992B (en) |
| TW (1) | TWI489131B (en) |
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| CN103913823B (en) | 2013-11-29 | 2017-01-04 | 玉晶光电(厦门)有限公司 | Optical imaging lens and apply the electronic installation of this optical imaging lens |
| JP6324824B2 (en) * | 2014-06-27 | 2018-05-16 | カンタツ株式会社 | Imaging lens |
| KR101661922B1 (en) * | 2014-12-22 | 2016-10-04 | (주)파트론 | Lens optical system |
| TWI557429B (en) * | 2015-01-21 | 2016-11-11 | 先進光電科技股份有限公司 | Optical image capturing system |
| TWI564587B (en) * | 2015-04-17 | 2017-01-01 | 先進光電科技股份有限公司 | Optical image capturing system |
| TWI563310B (en) * | 2015-04-17 | 2016-12-21 | Ability Opto Electronics Technology Co Ltd | Optical image capturing system |
| JP6358752B2 (en) * | 2015-12-25 | 2018-07-18 | カンタツ株式会社 | Imaging lens |
| JP5953450B1 (en) * | 2016-04-08 | 2016-07-20 | エーエーシー テクノロジーズ ピーティーイー リミテッドＡａｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｐｔｅ．Ｌｔｄ． | Imaging lens |
| CN110398817B (en) * | 2019-06-29 | 2021-09-17 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
| CN112799211B (en) * | 2021-01-14 | 2022-06-24 | 江西晶超光学有限公司 | Optical system, image capturing module and electronic equipment |
| CN116299963A (en) * | 2021-02-05 | 2023-06-23 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN115561876A (en) * | 2021-07-01 | 2023-01-03 | 浙江舜宇光学有限公司 | Optical imaging lens group |
| CN113835195A (en) * | 2021-09-24 | 2021-12-24 | 浙江舜宇光学有限公司 | Four-piece type optical imaging lens |
| CN113721351B (en) * | 2021-11-04 | 2022-04-19 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
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| CN201765373U (en) * | 2010-04-26 | 2011-03-16 | 富士能株式会社 | Pickup lens and pickup device as well as convenient terminal unit |
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| DE69220044T2 (en) * | 1991-12-13 | 1997-12-11 | Eastman Kodak Co | ZOOM LENS SYSTEM FOR COMPACT CAMERA |
| JPH07294810A (en) * | 1994-04-20 | 1995-11-10 | Ricoh Co Ltd | Color picture reading lens |
| JP5334688B2 (en) * | 2009-05-29 | 2013-11-06 | カンタツ株式会社 | Imaging lens for solid-state imaging device |
| CN102460264B (en) * | 2009-06-03 | 2014-07-16 | 柯尼卡美能达精密光学株式会社 | Image pickup lens, image pickup device having image pickup lens, and portable terminal having image pickup device |
| JP2011203723A (en) * | 2010-03-01 | 2011-10-13 | Fujifilm Corp | Imaging lens and imaging system |
| CN102193166B (en) * | 2010-03-01 | 2015-08-26 | 富士胶片株式会社 | Imaging lens and imaging system |
| KR101218999B1 (en) * | 2010-06-17 | 2013-01-04 | 삼성전기주식회사 | Optical system |
| JP5688334B2 (en) * | 2011-06-30 | 2015-03-25 | カンタツ株式会社 | Imaging lens |
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| CN201765373U (en) * | 2010-04-26 | 2011-03-16 | 富士能株式会社 | Pickup lens and pickup device as well as convenient terminal unit |
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| Publication number | Publication date |
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| WO2013111612A1 (en) | 2013-08-01 |
| TWI489131B (en) | 2015-06-21 |
| TW201346321A (en) | 2013-11-16 |
| JPWO2013111612A1 (en) | 2015-05-11 |
| CN104105992A (en) | 2014-10-15 |
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Application publication date: 20141015 Assignee: Zhejiang Shunyu Optical Co., Ltd. Assignor: Konica Minolta Opto, Inc. Contract record no.: 2017990000500 Denomination of invention: Long-range monitoring camera lens and application in computer long-range monitoring system Granted publication date: 20170222 License type: Exclusive License Record date: 20171229 |
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