CN101046546A - Imaging lens - Google Patents
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- CN101046546A CN101046546A CN 200710091897 CN200710091897A CN101046546A CN 101046546 A CN101046546 A CN 101046546A CN 200710091897 CN200710091897 CN 200710091897 CN 200710091897 A CN200710091897 A CN 200710091897A CN 101046546 A CN101046546 A CN 101046546A
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- 230000003287 optical effect Effects 0.000 claims abstract description 50
- 230000005499 meniscus Effects 0.000 claims abstract description 8
- 230000014509 gene expression Effects 0.000 abstract description 56
- 230000004075 alteration Effects 0.000 abstract description 50
- 230000010485 coping Effects 0.000 abstract 1
- 201000009310 astigmatism Diseases 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000005457 optimization Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 241000700608 Sagitta Species 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000006059 cover glass Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
To provide a compact, high-performance imaging lens capable of sufficiently securing the inside spacing for arranging a shutter mechanism while maintaining high aberration performance coping with high-pixels. The imaging lens comprises, in order from an object side: a first lens G1 having positive refractive power; a second lens G2 having negative refractive power whose concave surface faces the object; and a third lens G3 having positive refractive power and having a positive meniscus form that has a convex surface, facing the object, in a portion at and around an optical axis of the imaging lens; wherein the imaging lens satisfies conditional expressions given below: (1) 0.7<f1/f<1.3, (2) 0.2<D2/f<0.6, (3) 0.3< 3/4 f2/f 3/4 <0.8 and (4) 0.5<f3/f<0.8, where f: a focal length of an overall system, f1: a focal length of the first lens G1, f2: a focal length of the second lens G2, f3: a focal length of the thrid lens G3, and D2: a spacing, on the optical axis Z1, between the first lens G1 and the second lens G2.
Description
Technical field
The present invention relates to a kind of mounting in the portable phone of digital still camera for example, subsidiary video camera and information carried terminal (PDA: personal digital assistant) wait imaging lens system in the shooting machine of use CCD (Charged CoupledDevice) and CMOS imaging apparatuss such as (Complementary Metal Oxide Semiconductor).
Background technology
Imaging apparatus such as CCD and CMOS is unusual miniaturization and the high pixelation progress of forward in recent years.For this reason, to camera body, so that the lens of its mounting, also require small-sized and high-performance.In order to realize miniaturization, and need be with total length shorteningization and minor diameterization (miniaturization of the radial direction vertical with optical axis).In addition, usually in image pickup optical system, except miniaturization, also require disposition far away promptly to be similar to parallel (incident angle in the shooting face is approximately zero with respect to the normal of shooting face) with respect to optical axis towards the incident angle of the chief ray of imaging apparatus.In order to ensure disposition far away, it is comparatively favourable being disposed at the optical aperture diaphragm near object side as far as possible.In patent documentation 1, disclose and had 3 pieces of lens as a whole, and the optical aperture diaphragm has been disposed at the imaging lens system of the structure of close object side.In addition, in patent documentation 2, disclose and had 3 pieces of structures as a whole, and between the 1st lens and the 2nd lens the imaging lens system of the structure of configuration optical aperture diaphragm.
(patent documentation 1) spy opens the 2005-292235 communique
(patent documentation 2) spy opens the 2004-302058 communique
Yet in the camera head of still image photography usefulness, the progress along with the high pixelation of imaging apparatus need be provided with mechanical shutter for the reduction of seeking the signal noise in the imaging apparatus.Be provided with under the situation of shutter, in order to reduce the light quantity inequality, it is comparatively favourable approaching the optical aperture diaphragm and disposing.On the other hand, in the imaging lens system of 3 pieces of structures, in order to guarantee disposition far away as described above, and as far as possible at object side, for example the front or rear configuration optical aperture diaphragm of the 1st lens is comparatively favourable.Yet the most close object side is comparatively unfavorable aspect miniaturization if tripper is disposed at before the 1st lens.Therefore, it is inner and between the 1st lens and the 2nd lens to consider that tripper is disposed at lens combination.For this reason, wish a kind of lens of exploitation, it when guaranteeing the airspace in order to dispose tripper fully between the 1st lens and the 2nd lens, has and the corresponding high aberration performance of high pixelation in the imaging lens system of 3 pieces of structures.Among the embodiment 3 of patent documentation 1, though widely guarantee the interval of the 1st lens and the 2nd lens, and become the structure that helps the tripper configuration, wish that exploitation is a kind of than these lens that more help the configuration of tripper and have high aberration performance.
Summary of the invention
The present invention is directed to related problem points and propose, its purpose is for providing a kind of small-sized and high performance imaging lens system, its keep with the corresponding high aberration performance of high pixelation in, fully guaranteed to be used to dispose the internal interval of tripper.
Based on imaging lens system of the present invention, have in turn from object side: the 1st lens, it has positive refracting power; The 2nd lens, its be with concave surface towards object side, and have negative refracting power; Being shaped as near the 3rd lens, its optical axis with the positive meniscus shape of convex surface towards object side, the one side at least in the 1st lens, the 2nd lens and the 3rd lens is an aspheric surface, and the formula that meets the following conditions:
0.7＜f1/f＜1.3 ……(1)
0.2＜D2/f＜0.6 ……(2)
0.3＜|f2/f|＜0.8 ……(3)
0.5＜f3/f＜0.8 ……(4)
Wherein, f is system-wide focal length, and f1 is the focal length of the 1st lens, and f2 is the focal length of the 2nd lens, and f3 is the focal length of the 3rd lens, and D2 is the 1st lens on the optical axis and the interval of the 2nd lens.
In based on imaging lens system of the present invention, have as a whole with three pieces of so less formations, making the shape of each lens and refracting power is suitable value, thereby seeks miniaturization.In addition,, widely guaranteed the interval of the 1st lens and the 2nd lens, helped the configuration of door-opening mechanism by the formula of satisfying condition (2).In addition,, the optical power of each lens can be distributed optimization by the formula of satisfying condition (1), conditional (3) and conditional (4), and maintenance and the corresponding high aberration performance of high-performance.
In based on imaging lens system of the present invention, be preferably and also satisfy following conditional:
20＜υ1-υ2 ……(5)
In the formula, υ 1 is the Abbe number of the 1st lens, and υ 2 is the Abbe number of the 2nd lens.
In addition, in based on imaging lens system of the present invention, be preferably, the face of the object side of the 1st lens is a convex form nearby at optical axis, and the 2nd lens are the concave-concave shapes nearby at optical axis.Perhaps, be preferably, the face of the object side of the 1st lens is a convex form nearby at optical axis, and the 2nd lens are meniscus shapes nearby at optical axis.Thus, each conditional that is content with very little, and be easy to seek high performance.
According to imaging lens system of the present invention, satisfy the defined terms formula with 3 pieces of so less lens arrangements as a whole, thereby sought the optimization of configuration of shape, refracting power and even each lens of each lens, therefore can realize a kind of small-sized and high performance imaging lens system, its can keep with the corresponding high aberration performance of high pixelation in, the inner space of fully guaranteeing to be used to dispose tripper.
Description of drawings
Fig. 1 is the imaging lens system corresponding lens profile figure related with embodiments of the invention 1.
Fig. 2 is the imaging lens system corresponding lens profile figure related with embodiments of the invention 2.
Fig. 3 is the imaging lens system corresponding lens profile figure related with embodiments of the invention 3.
Fig. 4 is the imaging lens system corresponding lens profile figure related with embodiments of the invention 4.
Fig. 5 is the imaging lens system corresponding lens profile figure related with embodiments of the invention 5.
Fig. 6 is the imaging lens system corresponding lens profile figure related with embodiments of the invention 6.
Fig. 7 is the imaging lens system corresponding lens profile figure related with embodiments of the invention 7.
Fig. 8 is the figure of the lens data of the related imaging lens system of expression embodiments of the invention 1, (A) the basic lens data of expression, (B) the expression lens data relevant with aspheric surface.
Fig. 9 is the figure of the lens data of the related imaging lens system of expression embodiments of the invention 2, (A) the basic lens data of expression, (B) the expression lens data relevant with aspheric surface.
Figure 10 is the figure of the lens data of the related imaging lens system of expression embodiments of the invention 3, (A) the basic lens data of expression, (B) the expression lens data relevant with aspheric surface.
Figure 11 is the figure of the lens data of the related imaging lens system of expression embodiments of the invention 4, (A) the basic lens data of expression, (B) the expression lens data relevant with aspheric surface.
Figure 12 is the figure of the lens data of the related imaging lens system of expression embodiments of the invention 5, (A) the basic lens data of expression, (B) the expression lens data relevant with aspheric surface.
Figure 13 is the figure of the basic lens data of the related imaging lens system of expression embodiments of the invention 6.
The figure of Figure 14 lens data that to be expression relevant with the aspheric surface of the related imaging lens system of embodiments of the invention 6.
Figure 15 is the figure of the basic lens data of the related imaging lens system of expression embodiments of the invention 7.
The figure of Figure 16 lens data that to be expression relevant with the aspheric surface of the related imaging lens system of embodiments of the invention 7.
Figure 17 is the figure that gathers the expression value relevant with conditional for each embodiment.
Figure 18 is the aberration diagram of all aberrations of the related imaging lens system of expression embodiments of the invention 1, (A) expression spherical aberration, (B) expression astigmatism, (C) expression distortion.
Figure 19 is the aberration diagram of all aberrations of the related imaging lens system of expression embodiments of the invention 2, (A) expression spherical aberration, (B) expression astigmatism, (C) expression distortion.
Figure 20 is the aberration diagram of all aberrations of the related imaging lens system of expression embodiments of the invention 3, (A) expression spherical aberration, (B) expression astigmatism, (C) expression distortion.
Figure 21 is the aberration diagram of all aberrations of the related imaging lens system of expression embodiments of the invention 4, (A) expression spherical aberration, (B) expression astigmatism, (C) expression distortion.
Figure 22 is the aberration diagram of all aberrations of the related imaging lens system of expression embodiments of the invention 5, (A) expression spherical aberration, (B) expression astigmatism, (C) expression distortion.
Figure 23 is the aberration diagram of all aberrations of the related imaging lens system of expression embodiments of the invention 6, (A) expression spherical aberration, (B) expression astigmatism, (C) expression distortion.
Figure 24 is the aberration diagram of all aberrations of the related imaging lens system of expression embodiments of the invention 7, (A) expression spherical aberration, (B) expression astigmatism, (C) expression distortion.
Among the figure: 10-shutter, G1-the 1st lens, G2-the 2nd lens, G3-the 3rd lens, St-aperture diaphragm, Ri-are from the radius-of-curvature of object side i lens face, and Di-is from the face interval of object side i lens face and i+1 lens face, Z1-optical axis.
Embodiment
Below, at length embodiments of the present invention are described with reference to accompanying drawing.
Fig. 1 represents the 1st configuration example of the imaging lens system that one embodiment of the present invention is related.This configuration example constitutes corresponding with the lens of the 1st numerical value embodiment described later (Fig. 8 (A), Fig. 8 (B)).Fig. 2 represents the 2nd configuration example.This configuration example constitutes corresponding with the lens of the 2nd numerical value embodiment described later (Fig. 9 (A), Fig. 9 (B)).Fig. 3 represents the 3rd configuration example.This configuration example constitutes corresponding with the lens of the 3rd numerical value embodiment described later (Figure 10 (A), Figure 10 (B)).Fig. 4 represents the 4th configuration example.This configuration example constitutes corresponding with the lens of the 4th numerical value embodiment described later (Figure 11 (A), Figure 11 (B)).Fig. 5 represents the 5th configuration example.This configuration example constitutes corresponding with the lens of the 5th numerical value embodiment described later (Figure 12 (A), Figure 12 (B)).Fig. 6 represents the 6th configuration example.This configuration example constitutes corresponding with the lens of the 6th numerical value embodiment described later (Figure 13, Figure 14).Fig. 7 represents the 7th configuration example.This configuration example constitutes corresponding with the lens of the 7th numerical value embodiment described later (Figure 15, Figure 16).In Fig. 1～Fig. 7, symbol Ri represents, with the face of the inscape of close object side as No. 1 and with radius-of-curvature along with the face of the i face of the mode diacritic that increases in turn towards picture side (imaging side).Symbol Di represents the radius-of-curvature of i face and i+1 face.Symbol Di, represent on the optical axis Z1 of i face and i+1 face face at interval.In addition, the formation basic for each configuration example is all identical, therefore in the following will the 1st configuration example shown in Figure 1 as illustrating substantially.
This imaging lens system, at the various shooting machines that use imaging lens systems such as CCD and CMOS, it is comparatively suitable to use in for example digital still camera, the portable phone of having video camera (camera) and the portable data assistance etc.This imaging lens system, Z1 has in turn from object side along optical axis: the 1st lens G1, the 2nd lens G2, the 3rd lens G3.At least one face among the 1st lens G1, the 2nd lens G2 and the 3rd lens G3 is an aspheric surface.
Be preferably, as far as possible just optical aperture diaphragm St is disposed at object side in order to ensure the heart (テ レ セ Application ト リ Star Network) property far away.In the configuration example of Fig. 1～Fig. 3 and Fig. 5～Fig. 7, with aperture diaphragm St dispose the 1st lens G1 the most close object side of front side, lens system.In the configuration example of Fig. 4, at the rear side configuration aperture diaphragm St of the 1st lens G1.Shutter (shutter) 10 is disposed between the 1st lens G1 and the 2nd lens G2.
On the imaging surface Simg of this imaging lens system, imaging apparatuss such as configuration CCD.Between the 3rd lens G3 and imaging apparatus, the structure according to the camera side that lens are installed disposes various optical component GC.For example, flat optical components such as the sealing cover glass of configuration shooting face protection usefulness and infrared cut off filter.
The 1st lens G1 has positive refracting power.The face of the object side of the 1st lens G1 is a convex form nearby at optical axis.In the configuration example of Fig. 1～Fig. 3 and Fig. 5～Fig. 7, the 1st lens G1 being shaped as near optical axis with the positive meniscus shape of convex surface towards object side.In the configuration example of Fig. 4, the optical axis of the 1st lens G1 nearby be shaped as the biconvex shape.
The 2nd lens G2 be with concave surface towards object side, and have negative refracting power.Be preferably, the 2nd lens G2 is the concave-concave shape nearby at optical axis.Perhaps, as Fig. 6 and Fig. 7, being preferably at optical axis nearby is meniscus shape.Be preferably, the face of the picture side of the 2nd lens G2 is a concave shape nearby at optical axis, is convex form at periphery.Thus, the be content with very little numerical range of conditional described later (3).
The 3rd lens G3 becomes being shaped as the positive meniscus shape of convex surface towards object side near optical axis.The 3rd lens G3 is the lens that are configured in the most close shooting face side., in the 3rd lens G3, compare with the 2nd lens G2 with the 1st lens G1 for this reason, separated for each field angle light beam.Therefore, in the 3rd lens G3, be easy to each field angle each carried out aberration correction, and be easy to carry out the correction of filed curvature and distortion aberration by suitable use aspheric surface.In addition, be easy to guaranteeing of disposition far away.In the configuration example of Fig. 1～Fig. 3 and Fig. 5～Fig. 7, nearby making the face as side of the 3rd lens G3 at optical axis is that concave shape is a convex form at periphery.
This imaging lens system meets the following conditions.Wherein, f is system-wide focal length, and f1 is the focal length of the 1st lens G1, and f2 is the focal length of the 2nd lens G2, and f3 is the focal length of the 3rd lens G3, and D2 is the 1st lens G1 on the optical axis Z1 and the interval of the 2nd lens G2.
0.7＜f1/f＜1.3 ……(1)
0.2＜D2/f＜0.6 ……(2)
0.3＜|f2/f|＜0.8 ……(3)
0.5＜f3/f＜0.8 ……(4)
In this imaging lens system, be preferably and satisfy following conditional.In the formula, υ 1 is the Abbe number of the 1st lens G1, and υ 2 is the Abbe number of the 2nd lens G2.
20＜υ1-υ2 ……(5)
Next, effect and effect according to above-mentioned such imaging lens system that constitutes are described.
In this imaging lens system,, can realize thus helping that total length shortens and the lens combination of guaranteeing of disposition far away by being 3 pieces of such lens arrangements and in the front side of the 1st lens or rear side configuration aperture diaphragm St as a whole.And, by satisfying each conditional, can be in the optimization of the configuration of the refracting power of seeking each lens and even each lens, when keeping corresponding with high pixelation high aberration performance, fully guarantee to be used to dispose the internal interval of tripper.And, in this imaging lens system,, can carry out more effective aberration correction by aspheric surface optimization with each face.For corresponding, be that chief ray approaches parallel (incident angle in the shooting face approaches zero with respect to the normal of shooting face) to the incident angle of imaging apparatus with respect to optical axis and need disposition far away with the imaging apparatus of high pixel.In this imaging lens system, as the formation of Fig. 1～Fig. 3 and Fig. 5～Fig. 7, for example will be designed to following shape: promptly nearby as side be concave shape and be convex form as side at periphery at optical axis as the face of the 3rd lens G3 of the final lens face of close imaging apparatus as side, thus can be suitably each of each field angle be carried out aberration correction, and the incident angle of light beam to imaging apparatus can be controlled to be below certain angle.Thus, can alleviate the light quantity inequality of imaging surface in region-wide, and help the correction of filed curvature and basic aberration.
Conditional (1) is the conditional about the focal distance f 1 of the 1st lens G1, if surpass this numerical range, then the optical power of the 1st lens G1 becomes too small, and the shorteningization of total length is difficulty comparatively.In addition, if be lower than this numerical range, the correction of filed curvature and astigmatism is difficulty comparatively, and the emergent pupil angle becomes excessive, and not preferred.
Conditional (2) is about the conditional of the interval D between the 1st lens G1 and the 2nd lens G2 2 with all focal distance f, if surpass this numerical range, then the shorteningization of total length is comparatively difficult.In addition,, then can not fully guarantee the interval D 2 of the 1st lens G1 and the 2nd lens G2, and be difficult to dispose tripper if be lower than this numerical range, therefore not preferred.
Conditional (3) is the conditional about the focal distance f 2 of the 2nd lens G2, if surpass this numerical range, then the optical power of the 2nd lens G2 becomes too small, and the shorteningization of total length is difficulty comparatively.In addition, if be lower than this numerical range, then the correction of filed curvature and astigmatism etc. is comparatively difficult, therefore not preferred.Conditional (4) is relevant with the focal distance f 3 of the 3rd lens G3, no matter is departing from this numerical range up and down, then will lack of proper care with the optical power balance of the 2nd lens, is difficult under the situation that guarantees total length all aberrations be proofreaied and correct shortly, and is therefore not preferred.Conditional (5), be and the relevant conditional of Abbe number of the 1st lens G1 and the 2nd lens G2, if be lower than this numerical range, then be difficult to carry out sufficient chromatic aberation and proofread and correct, therefore not preferred.
As discussed above, according to the related imaging lens system of present embodiment, satisfy the defined terms formula with 3 pieces of so less lens arrangements as a whole, thereby sought the optimization of configuration of shape, refracting power and even each lens of each lens, therefore can realize a kind of small-sized and high performance imaging lens system, its can keep with the corresponding high aberration performance of high pixelation in, the inner space of fully guaranteeing to be used to dispose tripper.
(embodiment)
Next, the concrete numerical value embodiment to the related imaging lens system of present embodiment describes.Below, gather the 1st～the 7th numerical value embodiment is described.
Will with the corresponding concrete lens data of formation of imaging lens system shown in Figure 1 as embodiment 1, and shown in Fig. 8 (A), Fig. 8 (B).Particularly, its basic lens data has been shown in Fig. 8 (A), in Fig. 8 (B), the data relevant with aspheric surface has been shown.In face in the lens data in the lens data shown in Fig. 8 (A) numbering Si one hurdle, the face with the textural element of close object side of showing is as number one and along with the numbering towards i number (i=1～8) face of diacritic as side increases in turn.On radius of curvature R i one hurdle, show with Fig. 1 in additional symbol Ri accordingly from the value (mm) of the radius-of-curvature of the several i faces of object side.For face interval D i one hurdle, similarly represent the interval (mm) on optical axis from object side several i face Si and i+1 face Si+1.Ndj, expression is from object side j (j=1～4) number the optical parameter value with respect to the refractive index of d line (wavelength 587.6nm).υ dj one hurdle, expression is from the value of j number (j=1～6) optical parameter of object side with respect to the Abbe number of d line (wavelength 587.6nm).Among Fig. 8 (A), in addition,, show the paraxial focal distance f (mm) of total system and the value of F number (FNO.) as all data.
In the related imaging lens system of embodiment 1, the 1st lens G1, the 2nd lens G2 and the 2nd lens G3 two sides are aspherical shape.In the basic lens data of Fig. 8 (A),, show the numerical value of optical axis radius-of-curvature nearby as these aspheric radius-of-curvature.In the numerical value that in Fig. 8 (B), illustrates as aspherical surface data, mark " E ", expression and then its data is the end " power exponent " with 10, expression will be that the represented numerical value of exponential function at the end multiply by " E " preceding numerical value with 10 by this.For example, if " 1.0E-02 ", then expression " 1.0 * 10
-2".
As aspherical surface data, the value of each coefficient An, K in the formula of the aspherical shape that the formula (A) below the expression is represented.In more detail, Z represents from the aspheric surface point that is positioned at the position of the leaving optical axis Z1 height h length (mm) to the drawn vertical line in the section (perpendicular to the plane of optical axis Z1) on aspheric summit.In the embodiment 1 related imaging lens system, each aspheric surface is used the 3rd time～the 10th time coefficient A effectively as asphericity coefficient An
3～A
10And represent.
Z=Ch
2/ { 1+ (1-KC
2H
2)
1/2}+∑ A
nH
n(A) (integer that i=3 is above)
Wherein,
Z: the aspheric degree of depth (mm);
H: the distance from the optical axis to the lens face (highly) (mm);
K: eccentricity (the 2nd time asphericity coefficient);
C: paraxial curvature=1/R;
(R: paraxial radius-of-curvature);
A
n: the n time asphericity coefficient.
Same with the imaging lens system that the above embodiments 1 are related, will with the corresponding concrete lens data of the structure of the imaging lens system shown in Fig. 2 as embodiment 2, shown in Fig. 9 (A), Fig. 9 (B).In addition, equally will be with the corresponding concrete lens data of the structure of the imaging lens system shown in Fig. 3 as embodiment 3 shown in Figure 10 (A), Figure 10 (B).And, equally will with the corresponding concrete lens data of the structure of the imaging lens system shown in Fig. 4 as embodiment 4, and shown in Figure 11 (A), Figure 11 (B).And, equally will with the corresponding concrete lens data of the structure of the imaging lens system shown in Fig. 5 as embodiment 5, and shown in Figure 12 (A), Figure 12 (B).And, equally will with the corresponding concrete lens data of the structure of the imaging lens system shown in Fig. 6 as embodiment 6, and shown in Figure 13, Figure 14.And, equally will with the corresponding concrete lens data of the structure of the imaging lens system shown in Fig. 7 as embodiment 7, and shown in Figure 15, Figure 16.In addition, for the related imaging lens system of embodiment 2～embodiment 7 one of them, similarly to Example 1, the two sides of the 1st lens G1, the 2nd lens G2, the 3rd lens G3 is aspherical shape.Wherein, about the asphericity coefficient of the imaging lens system of embodiment 6, the 1st and the 2nd coefficient A that uses the 3rd time～the 10th time
3～A
10And represent the 3rd～the 6th coefficient A that uses the 3rd time～the 16th time
3～A
16And represent.For 7, the 1～the 5th use of embodiment similarly to Example 6 coefficient and represent that the 6th face uses the 3rd time～the 20th time coefficient A effectively
3～A
20And represent.
In Figure 17, gather the expression value relevant with each above-mentioned conditional for each embodiment.As can understanding from Figure 17, the value of each embodiment is positioned at the numerical range of each conditional.
Figure 18 (A)～18 (C) represents spherical aberration, astigmatism (filed curvature) and the distortion (distortion aberration) in the related imaging lens system of embodiment 1 respectively.In each aberration diagram, showing with the d line is the aberration of reference wavelength.In spherical aberration diagram, also show the aberration of g line (wavelength 435.8nm) and C line (wavelength 656.3nm).In astigmatism figure, solid line is represented the aberration of the sagitta of arc (サ ジ Le) direction, and F represents the aberration of tangential direction.FNO. represent the F value, ω represents half angle of view.
Equally, Figure 19 (A)～19 (C) shows all aberrations about the related imaging lens system of embodiment 2, Figure 20 (A)～20 (C) shows all aberrations about the related imaging lens system of embodiment 3, Figure 21 (A)～21 (C) shows all aberrations about the related imaging lens system of embodiment 4, Figure 22 (A)～22 (C) shows all aberrations about the related imaging lens system of embodiment 5, Figure 23 (A)～23 (C) shows all aberrations about the related imaging lens system of embodiment 6, and Figure 24 (A)～24 (C) shows all aberrations about the related imaging lens system of embodiment 7.
As understanding from above each numeric data and each aberration diagram, for each embodiment, can access a kind of small-sized and high performance camera-lens system, it is as a whole with 3 pieces of lens arrangements, make the face shape of lens material, lens and the optical power of each lens distribute optimization, and fully guarantee to be used to dispose the internal interval of tripper.
In addition, the present invention is not limited to above-mentioned embodiment and each embodiment, and the embodiment of various distortion also is possible.For example, the value of the radius-of-curvature of each lens composition, face interval and refractive index etc. are not limited to the shown value by above-mentioned each numerical value embodiment, can adopt other value.
Claims (4)
1, a kind of imaging lens system is characterized in that,
Have in turn from object side:
The 1st lens, it has positive refracting power;
The 2nd lens, its be with concave surface towards object side, and have negative refracting power;
Being shaped as near the 3rd lens, its optical axis with the positive meniscus shape of convex surface towards object side,
One side at least in described the 1st lens, described the 2nd lens and described the 3rd lens is an aspheric surface, and the formula that meets the following conditions:
0.7＜f1/f＜1.3 …… (1)
0.2＜D2/f＜0.6 …… (2)
0.3＜|f2/f|＜0.8 …… (3)
0.5＜f3/f＜0.8 …… (4)
Wherein,
F: system-wide focal length,
F1: the focal length of the 1st lens,
F2: the focal length of the 2nd lens,
F3: the focal length of the 3rd lens,
D2: the 1st lens on the optical axis and the interval of the 2nd lens.
2, imaging lens system according to claim 1 is characterised in that,
Also satisfy following conditional:
20＜υ1-υ2 …… (5)
In the formula, υ 1 is the Abbe number of the 1st lens, and υ 2 is the Abbe number of the 2nd lens.
3, imaging lens system according to claim 1 and 2 is characterised in that,
The face of the object side of described the 1st lens is a convex form nearby at optical axis, and described the 2nd lens are the concave-concave shapes nearby at optical axis.
4, imaging lens system according to claim 1 and 2 is characterised in that,
The face of the object side of described the 1st lens is a convex form nearby at optical axis, and described the 2nd lens are meniscus shapes nearby at optical axis.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006087411 | 2006-03-28 | ||
| JP2006087411 | 2006-03-28 | ||
| JP2006201709 | 2006-07-25 | ||
| JP2006285909 | 2006-10-20 |
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| Publication Number | Publication Date |
|---|---|
| CN101046546A true CN101046546A (en) | 2007-10-03 |
| CN100470292C CN100470292C (en) | 2009-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100918973A Expired - Fee Related CN100470292C (en) | 2006-03-28 | 2007-03-28 | Imaging lens |
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| Country | Link |
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| CN (1) | CN100470292C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846793A (en) * | 2010-05-28 | 2010-09-29 | 浙江舜宇光学有限公司 | Micro pickup lens |
| CN102317832A (en) * | 2009-05-28 | 2012-01-11 | 株式会社光学逻辑 | Image pickup lens |
| CN102411191A (en) * | 2010-09-21 | 2012-04-11 | 株式会社尼康 | Viewing Optical System, Viewfinder Equipped With The Viewing Optical System And Method For Manufacturing The Viewing Optical System |
| CN102439504A (en) * | 2009-05-29 | 2012-05-02 | 康达智株式会社 | Imaging lens for solid-state imaging element |
| CN102681150A (en) * | 2011-03-15 | 2012-09-19 | 索尼公司 | Zoom lens and imaging apparatus |
| CN104220916A (en) * | 2012-04-09 | 2014-12-17 | 富士胶片株式会社 | Image pick-up lens and image pick-up device |
| CN110308540A (en) * | 2018-03-27 | 2019-10-08 | 三星电机株式会社 | Optical imaging system |
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2007
- 2007-03-28 CN CNB2007100918973A patent/CN100470292C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102317832A (en) * | 2009-05-28 | 2012-01-11 | 株式会社光学逻辑 | Image pickup lens |
| CN102317832B (en) * | 2009-05-28 | 2014-10-08 | 株式会社光学逻辑 | Image pickup lens |
| CN102439504A (en) * | 2009-05-29 | 2012-05-02 | 康达智株式会社 | Imaging lens for solid-state imaging element |
| CN102439504B (en) * | 2009-05-29 | 2014-06-04 | 康达智株式会社 | Imaging lens for solid-state imaging element |
| CN102439505B (en) * | 2010-05-28 | 2015-08-12 | 浙江舜宇光学有限公司 | A kind of micro pick-up lens |
| WO2011147136A1 (en) * | 2010-05-28 | 2011-12-01 | 浙江舜宇光学有限公司 | Micro camera lens |
| CN102439505A (en) * | 2010-05-28 | 2012-05-02 | 浙江舜宇光学有限公司 | Micro camera lens |
| CN101846793A (en) * | 2010-05-28 | 2010-09-29 | 浙江舜宇光学有限公司 | Micro pickup lens |
| CN102411191A (en) * | 2010-09-21 | 2012-04-11 | 株式会社尼康 | Viewing Optical System, Viewfinder Equipped With The Viewing Optical System And Method For Manufacturing The Viewing Optical System |
| CN102411191B (en) * | 2010-09-21 | 2016-01-20 | 株式会社尼康 | The view finder of this viewing optical system and the method for the manufacture of viewing optical system be equipped with viewing optical system, |
| CN102681150A (en) * | 2011-03-15 | 2012-09-19 | 索尼公司 | Zoom lens and imaging apparatus |
| CN104220916A (en) * | 2012-04-09 | 2014-12-17 | 富士胶片株式会社 | Image pick-up lens and image pick-up device |
| CN110308540A (en) * | 2018-03-27 | 2019-10-08 | 三星电机株式会社 | Optical imaging system |
| US11927724B2 (en) | 2018-03-27 | 2024-03-12 | Samsung Electro-Mechanics Co., Ltd. | Optical imaging system |
Also Published As
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| CN100470292C (en) | 2009-03-18 |
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