CN102073127B - Camera lens - Google Patents

Abstract

The invention provides a small-sized and large-caliber camera lens which is easy to process, and also well corrects high imaging performance, particularly spherical aberration and coma aberration. The overall optical length and the number of lenses are reduced to a degree that the portability of a portable phone cannot be reduced. The small-sized and large-caliber camera lens is used for imaging light from a shot object on a camera element, and is characterized by comprising a diaphragm, a first lens with positive focal power, a second lens with negative focal power, a third lens with positive focal power and a fourth lens with negative focal power in turn from an object side, wherein the concave surface of the second lens faces an image side; the positive focal power of the fourth lens is gradually strengthened from the center to the periphery; and the first surface of the object side of the first lens is a concave surface or flat surface.

Description

Phtographic lens

Technical field

The present invention relates to portable phone is that the attached camera head of PC, miniature movable device are with small-sized and bigbore phtographic lens phtographic lens etc., that be used on imaging apparatus, forming images with phtographic lens, PC camera.

Background technology

In recent years, using phtographic lens for portable phone, is being to pursue further high resolving power, heavy caliber by the high pixel transition of pursuing imaging apparatus.Therefore, propose to have methods such as lengthening optical full length, increase lens numbers.But the viewpoint from this product characteristics of portability that must pay attention to portable phone limits optical full length strictly, and makes the attenuation such as circumferential surface, thickness of camera lens, but has reached the processing boundary.

On the other hand, if the main application target of these phtographic lenses is moving image photographies, then its visual angle is that 50 °～43 ° li camera lens degree just should be enough.

Small-sized heavy caliber phtographic lens as in the past above-mentioned that kind; Proposition has following phtographic lens (with reference to patent documentation 1): at the position configuration aperture that leans on most object side; Comprise the 1st lens combination, the 2nd lens combination and the 3rd lens combination successively from object side then; Above-mentioned the 1st lens combination dispose successively from object side and have positive light coke (below; Be called positive lens) the 1st lens and the 2nd lens that engage with above-mentioned the 1st lens or constitute discretely with negative power (below, be called negative lens), above-mentioned the 2nd lens combination only is made up of the 3rd lens; The 3rd lens are that at least 1 plane of refraction is made as aspherical shape and is the positive meniscus lens (meniscus lens) of convex as side; Above-mentioned the 3rd lens combination only is made up of the 4th lens, and the 4th lens are that at least 1 plane of refraction is made as the diverging meniscus lens that aspherical shape and object side are convex, it is characterized in that; The focal power of above-mentioned the 1st lens combination satisfies following conditional (1), and the optical axis direction size of camera lens total system satisfies following conditional (2):

(1)0.8＜f _I/f＜2.8

(2)TL/f＜1.7

Wherein, f: the synthetic focal length of camera lens total system, f _I: the synthetic focal length of the 1st lens combination, TL: the distance (wherein, the parallel plane glass part is the air scaled distance) of leaning on face to the image planes of object side certainly most of aperture.

As another small-sized heavy caliber phtographic lens in the past; Proposition has following scheme (with reference to patent documentation 2): comprises the 1st lens G1 with positive light coke, the 2nd lens G2 successively, is that the face of convex surface and the 3rd lens G3 with positive light coke and object side is concave surface or plane and the 4th lens G4 with negative power near optical axis from object side as the face of side with negative power, and the conditional below satisfying: the focal length focal length

0.28＜|f4/f|＜0.60......(1)

Wherein, f is whole focal length, and f4 is the focal length of the 4th lens G4.

As another small-sized heavy caliber phtographic lens in the past; Proposition has following scheme (with reference to patent documentation 3): comprises the 1st lens G1 with positive light coke, the 2nd lens G2 successively, is that the face of convex surface and the 3rd lens G3 with positive light coke and object side is concave surface or plane and the 4th lens G4 with negative power near optical axis from object side as the face of side with negative power, and the conditional below satisfying.

0.5＜(|R2|-R1)/(R1+|R2|)......(1)

Wherein, R1 is the radius-of-curvature of face of the object side of the 1st lens G1, and R2 is the radius-of-curvature of face of the picture side of the 2nd lens G2.

< patent documentation >

Patent documentation 1: No. 3424030 communique of Jap.P.

Patent documentation 2: TOHKEMY 2009-020182 communique

Patent documentation 3: TOHKEMY 2010-102162 communique

The value of the conditional of the invention in the patent documentation 1 is following:

Conditional embodiment 1 embodiment 2 embodiment 3 embodiment 4 embodiment 5 embodiment 6

f/R1 1.5 1.6 1.61 1.64 1.7 1.61

|f2/f| 0.46 0.49 0.48 0.51 0.55 0.52

f/R4 1.198 1.22 1.15 1.2 1.15 1.25

(v1+v3)/v2 3.6 3.5 3.6 3.5 3.3 3.7

Conditional embodiment 7 embodiment 8 embodiment 9

f/R1 1.84 1.84 1.5

|f2/f| 0.5 0.51 0.52

f/R4 1.1 0.77 1.08

(v1+v3)/v2 3.6 4.2 3.6

The value of the conditional of the invention in the patent documentation 2 is following:

Conditional embodiment 1 embodiment 2 embodiment 3 embodiment 4 embodiment 5 embodiment 6

f/R1 1.31 1.4 0.96 1.27 1.42 1.77

|f2/f| 1.0 1.28 0.7 1.06 1.3 2.7

f/R4 2.4 1.7 1.89 2.23 1.76 1.59

(v1+v3)/v2 4.1 4.1 4.6 4.1 4.1 4.4

Conditional embodiment 7 embodiment 8

f/R1 1.47 1.47

|f2/f| 1.4 1.5

f/R4 1.96 1.79

(v1+v3)/v2 4.1 4.1

The value of the conditional of the invention in the patent documentation 3 is following:

Conditional embodiment 1 embodiment 2 embodiment 3 embodiment 4 embodiment 5 embodiment 6

f/R1 1.91 1.71 1.96 1.93 1.96 1.92

|f2/f| 1.54 1.04 2.08 3.27 1.43 1.24

f/R4 1.53 1.56 1.4 1.5 1.69 1.98

(v1+v3)/v2 4.3 4.4 4.4 4.3 4.3 4.4

There is following problem in pick-up lens on the pocket telephone that is installed on the band camera described in the patent documentation 1～3, portable information terminal machine or the like picture pick-up device: if brighter than F2.8, then spherical aberration and coma aberration can increase and cause resolution to descend.Promptly; In these patent documentations in the disclosed high magnification zoom lens; If with spherical aberration and coma correction to portable phone with phtographic lens, PC be the attached camera head of PC, miniature movable device with desired degree such as phtographic lenses, then can not realize heavy caliberization and high pixelation simultaneously.

Summary of the invention

The present invention makes in view of above-mentioned the problems referred to above point of the small-sized heavy caliber phtographic lens of technology in the past; Its purpose is to provide a kind of small-sized and bigbore phtographic lens of camera lens handling ease; It is suppressed to the degree that can not reduce the portability of portable phone with optical full length, lens number, proofreaies and correct high imaging performance, especially spherical aberration and coma aberration simultaneously well.

The present invention provides a kind of phtographic lens, and this phtographic lens is to be used to make the small-sized bigbore phtographic lens that on imaging apparatus, forms images from the light of being taken the photograph body, it is characterized in that above-mentioned phtographic lens comprises from object side successively: aperture 2; The 1st lens L1 with positive light coke; Has negative power and concave surface the 2nd lens L2 towards the picture side; The 3rd lens L3 with positive light coke; And the 4th lens with negative power;

Above-mentioned the 4th lens have negative power and have positive light coke at periphery at the center,

Object side the 1st surface of above-mentioned the 1st lens is concave surface or plane.

Phtographic lens of the present invention can be constructed as follows the small-sized and bigbore phtographic lens of camera lens handling ease through the structure as above-mentioned: this phtographic lens is suppressed to the degree that can not reduce the portability of portable phone with optical full length, lens number, proofreaies and correct high imaging performance, especially spherical aberration and coma aberration simultaneously well.

Embodiment of the present invention is described.

The 1st embodiment is according to above-mentioned phtographic lens, it is characterized in that, the conditional below satisfying:

-0.35＜f/R1≤0…(1)

Wherein, f is the focal length of phtographic lens total system, and R1 is the radius-of-curvature on object side the 1st surface of G1 (the 1st lens)

Conditional 1 is used for the relation between the radius-of-curvature on object side the 1st surface of focal length and G1 (the 1st lens) of regulation phtographic lens total system.

Through the formula of satisfying condition (1), can proofread and correct well owing to object plane side the 1st surface with the 1st lens is made as coma aberration and the sagittal coma off-axis aberration such as (sagittal coma) that concave surface or plane produce, thereby can obtain higher imaging performance.

If the lower limit of less-than condition formula (1), then spherical aberration can increase and resolution decline.

If the upper limit of greater than condition formula (1) then can't be proofreaied and correct off-axis aberration such as above-mentioned coma aberration and sagittal coma.

The 2nd embodiment is according at above-mentioned phtographic lens, it is characterized in that, the conditional below satisfying:

0.90＜|f2/f|＜1.20…(2)

Wherein, f2 is the focal length of the 2nd lens, and f is the focal length of phtographic lens total system.

Conditional (2) is used to stipulate the relation between the focal length of focal length and phtographic lens total system of the 2nd lens.Through the formula of satisfying condition (2), can keep the upward balance between the aberration of off-axis aberration and axle well.

If the lower limit of less-than condition formula (2) though then imaging performance is good, is difficult to realize densification.If the upper limit of greater than condition formula (2) then can make the interior positive light coke of camera lens and the composition grow of negative power, each aberration increases, and can cause that resolution performance descends.

The 3rd embodiment is according to above-mentioned phtographic lens, it is characterized in that, the conditional below satisfying:

f/R4＜3.5…(3)

Wherein, R4 is the curvature of the picture side surface of the 2nd lens G02, and f is the focal length of phtographic lens total system.

Conditional (3) is used to stipulate the relation between the focal length of curvature and phtographic lens total system of picture side surface of the 2nd lens G02.Through the formula of satisfying condition (3), the effect below obtaining: make coma aberration be formed at a side opposite and offset the coma aberration that object plane R1 produced by the 1st lens G01 with G02.

If the upper limit of greater than condition formula (3) then can cause coma correction excessive.

The 4th embodiment is according to above-mentioned phtographic lens, it is characterized in that, the conditional below satisfying:

4.4＜(v1+v3)/v2＜5.8…(4)

Wherein, vn is the Abbe number of n lens.

Conditional (4) is used to stipulate the relation between the Abbe number of the 1st lens～the 3rd lens.Through the formula of satisfying condition (4), chromatic aberation on the axis calibration well.

If the upper limit of greater than condition formula (4) then can cause the correction of chromatic aberation difficult.

Description of drawings

Fig. 1 is the optical picture of the 1st embodiment of phtographic lens of the present invention;

Fig. 2 is the aberration curve figure of the axial chromatic aberration of the iris radius of the 1st embodiment of expression phtographic lens of the present invention when being 0.7424mm;

Fig. 3 is the aberration diagram of the curvature of the image of the wavelength of the 1st embodiment of expression phtographic lens of the present invention when being 546nm;

Fig. 4 is the aberration diagram of the distortion aberration of the wavelength of the 1st embodiment of expression phtographic lens of the present invention when being 546nm;

Fig. 5 is the aberration diagram of the chromatic aberration,lateral of the wavelength of the 1st embodiment of expression phtographic lens of the present invention when being 546nm;

Fig. 6 is the optical picture of the 2nd embodiment of phtographic lens of the present invention;

Fig. 7 is the aberration curve figure of the axial chromatic aberration of the iris radius of the 2nd embodiment of expression phtographic lens of the present invention when being 0.7424mm;

Fig. 8 is the aberration diagram of the curvature of the image of the wavelength of the 2nd embodiment of expression phtographic lens of the present invention when being 546nm;

Fig. 9 is the aberration diagram of the distortion aberration of the wavelength of the 2nd embodiment of expression phtographic lens of the present invention when being 546nm;

Figure 10 is the aberration diagram of the chromatic aberration,lateral of the wavelength of the 2nd embodiment of expression phtographic lens of the present invention when being 546nm;

Figure 11 is the optical picture of the 3rd embodiment of phtographic lens of the present invention;

Figure 12 is the aberration curve figure of the axial chromatic aberration of the iris radius of the 3rd embodiment of expression phtographic lens of the present invention when being 0.7424mm;

Figure 13 is the aberration diagram of the curvature of the image of the wavelength of the 3rd embodiment of expression phtographic lens of the present invention when being 546nm;

Figure 14 is the aberration diagram of the distortion aberration of the wavelength of the 3rd embodiment of expression phtographic lens of the present invention when being 546nm;

Figure 15 is the aberration diagram of the chromatic aberration,lateral of the wavelength of the 1st embodiment of expression phtographic lens of the present invention when being 546nm;

Figure 16 is the optical picture of the 4th embodiment of phtographic lens of the present invention;

Figure 17 is the aberration curve figure of the axial chromatic aberration of the iris radius of the 4th embodiment of expression phtographic lens of the present invention when being 0.7424mm;

Figure 18 is the aberration diagram of the curvature of the image of the wavelength of the 4th embodiment of expression phtographic lens of the present invention when being 546nm;

Figure 19 is the aberration diagram of the distortion aberration of the wavelength of the 4th embodiment of expression phtographic lens of the present invention when being 546nm;

Figure 20 is the aberration diagram of the chromatic aberration,lateral of the wavelength of the 4th embodiment of expression phtographic lens of the present invention when being 546nm.

Embodiment

Below, with reference to accompanying drawing embodiment of the present invention is described.

(the 1st embodiment)

The phtographic lens of the 1st embodiment is:

Focal length 3.56mm

F value (F-number) 2.40

58.12 ° at visual angle

The optical data of the phtographic lens of the 1st embodiment is following:

Curvature of face radius thickness Nd Vd diameter of lens quadric surface constant

Thing ∞ ∞

1 (aperture) ∞ 0.03 1.485

2 aspheric surfaces-17.482 1.60 1.486 85.17 1.585 0

3 aspheric surfaces-1.442 0.40 2.496 0

4 aspheric surfaces 2.263 0.60 1.614 25.58 3.003 0

5 aspheric surfaces 1.043 0.76 2.922-2.189

6 aspheric surfaces-6.500 1.19 1.531 56.04 3.048 0

7 aspheric surfaces-0.876 0.05 3.373-3.326

8 aspheric surfaces 4.737 0.50 1.531 56.04 3.880 0

9 aspheric surfaces 0.952 0.40 4.045-6.490

10 ∞ 0.3 1.516 64.14 4.048 (cover glass)

11 ∞ 4.050

Aspheric surface uses the formula (10) with 15 asphericity coefficients to represent.

[formula 1]

$Z=\frac{{\mathrm{<figure-callout\; id="2"\; label="ch"\; filenames="HDA0000048201000000011.png,HDA0000048201000000091.png"\; state="\{\{state\}\}">ch</figure-callout>}}^2}{1+\sqrt{1-(K+1)c^2{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000048201000000011.png,HDA0000048201000000091.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}}+{\mathrm{Ah}}^3+{\mathrm{<figure-callout\; id="4"\; label="Bh"\; filenames="HDA0000048201000000041.png,HDA0000048201000000051.png"\; state="\{\{state\}\}">Bh</figure-callout>}}^4+{\mathrm{<figure-callout\; id="5"\; label="Ch"\; filenames="HDA0000048201000000011.png,HDA0000048201000000032.png"\; state="\{\{state\}\}">Ch</figure-callout>}}^5+{\mathrm{<figure-callout\; id="6"\; label="Dh"\; filenames="HDA0000048201000000041.png,HDA0000048201000000051.png"\; state="\{\{state\}\}">Dh</figure-callout>}}^6+{\mathrm{Eh}}^7+{\mathrm{<figure-callout\; id="8"\; label="Fh"\; filenames="HDA0000048201000000041.png,HDA0000048201000000081.png"\; state="\{\{state\}\}">Fh</figure-callout>}}^8+{\mathrm{<figure-callout\; id="9"\; label="Gh"\; filenames="HDA0000048201000000131.png"\; state="\{\{state\}\}">Gh</figure-callout>}}^9+{\mathrm{<figure-callout\; id="10"\; label="Hh"\; filenames="HDA0000048201000000011.png,HDA0000048201000000041.png"\; state="\{\{state\}\}">Hh</figure-callout>}}^{10}$

$+{\mathrm{Ih}}^{11}+J{h}^{12}+K{h}^{13}+L{h}^{14}+\mathrm{<figure-callout\; id="15"\; label="M\; h"\; filenames="HDA0000048201000000131.png"\; state="\{\{state\}\}">M</figure-callout>}{h}^{}{}^{15}\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\left(10\right)$

In formula 10,

c＝1/r

R: radius-of-curvature

H: from the height of optical axis

K: quadric surface constant (Conic Constant)

A:3 asphericity coefficient

B:4 asphericity coefficient

C:5 asphericity coefficient

D:6 asphericity coefficient

E:7 asphericity coefficient

F:8 asphericity coefficient

G:9 asphericity coefficient

H:10 asphericity coefficient

I:11 asphericity coefficient

J:12 asphericity coefficient

K:13 asphericity coefficient

L:14 asphericity coefficient

M:15 asphericity coefficient

The 2nd asphericity coefficient is following:

3 asphericity coefficients-0.007211005

4 asphericity coefficients-0.023891234

5 asphericity coefficients-0.014386231

6 asphericity coefficients 0.010223921

7 asphericity coefficients-0.00917567

8 asphericity coefficients-0.056920117

9 asphericity coefficients 0.00783551

10 asphericity coefficients 0.11912401

11 asphericity coefficients-0.003540121

12 asphericity coefficients-0.088136565

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 3rd asphericity coefficient is following:

3 asphericity coefficients-0.001110349

4 asphericity coefficients 0.064475398

5 asphericity coefficients-0.004018891

6 asphericity coefficients-0.011539407

7 asphericity coefficients 0.004030933

8 asphericity coefficients 0.018653849

9 asphericity coefficients 0.001579377

10 asphericity coefficients-0.008088555

11 asphericity coefficients-0.003098759

12 asphericity coefficients 0.004041067

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 4th asphericity coefficient is following:

3 asphericity coefficients 0.000653002

4 asphericity coefficients-0.095263608

5 asphericity coefficients 0.004551296

6 asphericity coefficients 0.020773543

7 asphericity coefficients 0.000610846

8 asphericity coefficients 0.00867811

9 asphericity coefficients-0.001283056

10 asphericity coefficients-0.005152747

11 asphericity coefficients 0.000651291

12 asphericity coefficients 0.000386719

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 5th asphericity coefficient is following:

3 asphericity coefficients-0.005800435

4 asphericity coefficients-0.027447842

5 asphericity coefficients 0.000592795

6 asphericity coefficients 0.010661177

7 asphericity coefficients 0.000849258

8 asphericity coefficients 0.003835183

9 asphericity coefficients 0.000443666

10 asphericity coefficients-0.001269391

11 asphericity coefficients-0.000179452

12 asphericity coefficients-0.000112462

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 6th asphericity coefficient is following:

3 asphericity coefficients-0.011298189

4 asphericity coefficients 0.059105997

5 asphericity coefficients 0.00997153

6 asphericity coefficients-0.006270409

7 asphericity coefficients-0.007579118

8 asphericity coefficients 0.00075122

9 asphericity coefficients-0.000346538

10 asphericity coefficients 0.000265496

11 asphericity coefficients 0.00026435

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 7th asphericity coefficient is following:

3 asphericity coefficients 0.021514053

4 asphericity coefficients-0.04383467

5 asphericity coefficients 0.011494644

6 asphericity coefficients 0.004966687

7 asphericity coefficients 0.00242608

8 asphericity coefficients 0.002353763

9 asphericity coefficients-0.002429119

10 asphericity coefficients-0.000397807

11 asphericity coefficients 0.000300121

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 8th asphericity coefficient is following:

3 asphericity coefficients-0.019921671

4 asphericity coefficients-0.002938746

5 asphericity coefficients-0.006022214

6 asphericity coefficients-0.012156673

7 asphericity coefficients 0.001806172

8 asphericity coefficients 0.004931718

9 asphericity coefficients-0.00044513

10 asphericity coefficients-0.00062046

11 asphericity coefficients 0.000100836

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 9th asphericity coefficient is following:

3 asphericity coefficients-0.011090315

4 asphericity coefficients-0.064663008

5 asphericity coefficients 0.014317423

6 asphericity coefficients 0.004963042

7 asphericity coefficients-0.003576365

8 asphericity coefficients-0.000819788

9 asphericity coefficients 0.000730058

10 asphericity coefficients 0.000483385

11 asphericity coefficients-0.000222591

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

(the 2nd embodiment)

The phtographic lens of the 2nd embodiment is:

Focal length 3.25mm

F value 2.40

62.66 ° at visual angle

Below, be as the criterion with the optical data of the 2nd embodiment and represent optical data.

Curvature of face radius thickness Nd Vd diameter of lens quadric surface constant

1 (aperture) ∞ 0.007 1.36

2 non-ball ∞ 1.845 1.53 56.04 1.46 0

3 aspheric surfaces-1.493 0.244 2.53 0

4 aspheric surfaces 3.039 0.683 1.632 3.88 2.93 0

5 non-balls 1.069 0.536 3.05-2.524

6 aspheric surfaces-25.591 1.418 1.53 56.04 3.52 0

7 aspheric surfaces-0.974 0.050 3.58-4.499

8 non-balls 2.209 0.500 1.53 56.04 4.05 0

9 aspheric surfaces 0.805 0.400 4.29-4.403

10 ∞ 0.300 1.52 64.14 4.20 (cover glass)

11 ∞ 4.15

The 2nd asphericity coefficient is following:

3 asphericity coefficients-0.01129743

4 asphericity coefficients 0.01032454

5 asphericity coefficients-0.05086398

6 asphericity coefficients 0.007546223

7 asphericity coefficients 0.03777617

8 asphericity coefficients-0.01588511

9 asphericity coefficients-0.01984939

10 asphericity coefficients 0.01768382

11 asphericity coefficients 0

12 asphericity coefficients-0.01999327

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 3rd asphericity coefficient is following:

3 asphericity coefficients-0.005624

4 asphericity coefficients 0.089553

5 asphericity coefficients-0.006253

6 asphericity coefficients-0.017363

7 asphericity coefficients 0.000251

8 asphericity coefficients 0.021082

9 asphericity coefficients 0.003417

10 asphericity coefficients-0.009808

11 asphericity coefficients 0

12 asphericity coefficients 0.001758

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 4th asphericity coefficient is following:

3 asphericity coefficients 0.004270

4 asphericity coefficients-0.092721

5 asphericity coefficients 0.007506

6 asphericity coefficients 0.018811

7 asphericity coefficients-0.000275

8 asphericity coefficients 0.008982

9 asphericity coefficients-0.001039

10 asphericity coefficients-0.004781

11 asphericity coefficients 0

12 asphericity coefficients 0.000654

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 5th asphericity coefficient is following:

3 asphericity coefficients-0.000996

4 asphericity coefficients-0.028802

5 asphericity coefficients 0.001268

6 asphericity coefficients 0.011368

7 asphericity coefficients-0.000263

8 asphericity coefficients 0.002328

9 asphericity coefficients-0.000327

10 asphericity coefficients-0.001692

11 asphericity coefficients 0

12 asphericity coefficients 0.000251

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 6th asphericity coefficient is following:

3 asphericity coefficients 0.00235

4 asphericity coefficients 0.04876

5 asphericity coefficients 0.00808

6 asphericity coefficients-0.00504

7 asphericity coefficients-0.00538

8 asphericity coefficients 0.00247

9 asphericity coefficients 0.00014

10 asphericity coefficients-7.29277

11 asphericity coefficients 0

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 7th asphericity coefficient is following:

3 asphericity coefficients-0.069576

4 asphericity coefficients-0.010287

5 asphericity coefficients 0.025801

6 asphericity coefficients-0.000710

7 asphericity coefficients-0.002332

8 asphericity coefficients 0.002099

9 asphericity coefficients-0.000693

10 asphericity coefficients 0.000488

11 asphericity coefficients 0

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 8th asphericity coefficient is following:

3 asphericity coefficients-0.119235

4 asphericity coefficients-0.007801

5 asphericity coefficients 0.012370

6 asphericity coefficients-0.006411

7 asphericity coefficients-0.002014

8 asphericity coefficients 0.002447

9 asphericity coefficients-0.000666

10 asphericity coefficients-0.000102

11 asphericity coefficients 0

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 9th asphericity coefficient is following:

3 asphericity coefficients-0.083076

4 asphericity coefficients 0.009098

5 asphericity coefficients 0.014032

6 asphericity coefficients-0.012353

7 asphericity coefficients-0.004341

8 asphericity coefficients 0.002035

9 asphericity coefficients 0.001277

10 asphericity coefficients-0.000486

11 asphericity coefficients 0

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

(the 3rd embodiment)

The phtographic lens of the 3rd embodiment is:

Focal length 3.26mm

F value 2.40

62.76 ° at visual angle

Curvature of face radius thickness Nd Vd diameter of lens quadric surface constant

1 (aperture) ∞ 0.004 1.3563

2 aspheric surface ∞ 1.875 1.53 56.04 1.4563 0

3 aspheric surfaces-1.547 0.049 2.5606 0

4 aspheric surfaces 2.429 0.702 1.63 23.88 2.9601 0

5 aspheric surfaces 1.029 0.545 3.0312-2.216

6 aspheric surfaces-15.365 1.494 1.55 71.68 3.2349 0

7 aspheric surfaces-1.089 0.050 3.2837-5.118

8 aspheric surfaces 2.577 0.500 1.53 56.04 3.8539 0

9 aspheric surfaces 0.947 0.400 4.0416-5.706

10 ∞ 0.300 1.52 64.14 4.0453 0 (cover glass)

11 ∞ 4.0472

The 2nd asphericity coefficient is following:

3 asphericity coefficients-0.0127019

4 asphericity coefficients 0.02673065

5 asphericity coefficients-0.06529852

6 asphericity coefficients 0.0208747

7 asphericity coefficients 0.04191463

8 asphericity coefficients-0.0171798

9 asphericity coefficients-0.04420722

10 asphericity coefficients 0.03596966

11 asphericity coefficients 0

12 asphericity coefficients-0.01543282

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 3rd asphericity coefficient is following:

3 asphericity coefficients-0.00153463

4 asphericity coefficients 0.08124042

5 asphericity coefficients 0.01223089

6 asphericity coefficients-0.01939172

7 asphericity coefficients-0.00425329

8 asphericity coefficients 0.02242078

9 asphericity coefficients 0.005560573

10 asphericity coefficients-0.01239374

11 asphericity coefficients 0

12 asphericity coefficients 0.001565621

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 4th asphericity coefficient is following:

3 asphericity coefficients 0.001663716

4 asphericity coefficients-0.08708907

5 asphericity coefficients 0.00875865

6 asphericity coefficients 0.02111224

7 asphericity coefficients-0.00128645

8 asphericity coefficients 0.006067185

9 asphericity coefficients-0.00212001

10 asphericity coefficients-0.00342413

11 asphericity coefficients 0

12 asphericity coefficients 0.000528857

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 5th asphericity coefficient is following:

3 asphericity coefficients-0.01464688

4 asphericity coefficients-0.02178799

5 asphericity coefficients 0.003288418

6 asphericity coefficients 0.0106688

7 asphericity coefficients-0.00039149

8 asphericity coefficients 0.00319148

9 asphericity coefficients-0.00010584

10 asphericity coefficients-0.00266545

11 asphericity coefficients 0

12 asphericity coefficients 0.000326809

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 6th asphericity coefficient is following:

3 asphericity coefficients 0.004141645

4 asphericity coefficients 0.05030176

5 asphericity coefficients 0.01138455

6 asphericity coefficients-0.00234975

7 asphericity coefficients-0.00428364

8 asphericity coefficients 0.002665626

9 asphericity coefficients-0.0001243

10 asphericity coefficients-0.00034834

11 asphericity coefficients 0

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 7th asphericity coefficient is following:

3 asphericity coefficients-0.09780719

4 asphericity coefficients 0.000542505

5 asphericity coefficients 0.03137389

6 asphericity coefficients-0.00022058

7 asphericity coefficients-0.00364352

8 asphericity coefficients 0.001363092

9 asphericity coefficients-0.00041099

10 asphericity coefficients 0.001596653

11 asphericity coefficients 0

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 8th asphericity coefficient is following:

3 asphericity coefficients-0.1300054

4 asphericity coefficients-0.0211528

5 asphericity coefficients 0.0108099

6 asphericity coefficients-0.00642861

7 asphericity coefficients-0.00030832

8 asphericity coefficients 0.004229584

9 asphericity coefficients-0.000096536

10 asphericity coefficients-0.00042523

11 asphericity coefficients 0

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 9th asphericity coefficient is following:

3 asphericity coefficients-0.02264918

4 asphericity coefficients-0.0634774

5 asphericity coefficients 0.01410162

6 asphericity coefficients-0.00589807

7 asphericity coefficients-0.00133129

8 asphericity coefficients 0.0024985

9 asphericity coefficients 0.000993493

10 asphericity coefficients-0.00058006

11 asphericity coefficients 0

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

(the 4th embodiment)

The phtographic lens of the 4th embodiment is:

Focal length 3.26mm

F value 2.40

62.48 ° at visual angle

Curvature of face radius thickness Nd Vd diameter of lens quadric surface constant

Thing ∞ ∞

1 (aperture) ∞ 0.027 1.3599

2 aspheric surfaces-12.881 1.652 1.55 71.68 1.4599 0

3 aspheric surfaces-1.484 0.247 2.4556 0

4 aspheric surfaces 2.307 0.597 1.63 23.88 2.9098 0

5 aspheric surfaces 1.076 0.727 2.9136-2.189

6 aspheric surfaces-3.452 1.176 1.53 56.04 3.0426 0

7 aspheric surfaces-0.924 0.050 3.2908-3.326

8 aspheric surfaces 2.720 0.500 1.53 56.04 3.9760 0

9 aspheric surfaces 0.998 0.400 4.0221-6.490

10 ∞ 0.300 1.52 64.14 4.0263 0 (cover glass)

11 ∞ 4.0328

The 2nd asphericity coefficient is following:

3 asphericity coefficients-0.0070677

4 asphericity coefficients-0.023093

5 asphericity coefficients-0.0103666

6 asphericity coefficients 0.01404672

7 asphericity coefficients-0.0052786

8 asphericity coefficients-0.0634868

9 asphericity coefficients 0.00035546

10 asphericity coefficients 0.12635067

11 asphericity coefficients 0.01036199

12 asphericity coefficients-0.1136779

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 3rd asphericity coefficient is following:

3 asphericity coefficients 0.00026747

4 asphericity coefficients 0.06256536

5 asphericity coefficients-0.0009308

6 asphericity coefficients-0.0119032

7 asphericity coefficients 0.00132442

8 asphericity coefficients 0.01751256

9 asphericity coefficients 0.0024964

10 asphericity coefficients-0.0062325

11 asphericity coefficients-0.0021903

12 asphericity coefficients 0.00209175

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 4th asphericity coefficient is following:

3 asphericity coefficients 0.00427879

4 asphericity coefficients-0.0951012

5 asphericity coefficients 0.00239963

6 asphericity coefficients 0.01730419

7 asphericity coefficients-0.0003219

8 asphericity coefficients 0.00951322

9 asphericity coefficients-0.0005498

10 asphericity coefficients-0.0051284

11 asphericity coefficients 0.00035

12 asphericity coefficients 0.00046999

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 5th asphericity coefficient is following:

3 asphericity coefficients-0.0092071

4 asphericity coefficients-0.0288519

5 asphericity coefficients 0.00058699

6 asphericity coefficients 0.01044185

7 asphericity coefficients-0.0000917

8 asphericity coefficients 0.00292672

9 asphericity coefficients 0.0001333

10 asphericity coefficients-0.0014517

11 asphericity coefficients-0.0000994

12 asphericity coefficients 0.00014898

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 6th asphericity coefficient is following:

3 asphericity coefficients-0.0053577

4 asphericity coefficients 0.06712455

5 asphericity coefficients 0.01483723

6 asphericity coefficients-0.002824

7 asphericity coefficients-0.0059001

8 asphericity coefficients 0.00084594

9 asphericity coefficients-0.0009789

10 asphericity coefficients-0.0001319

11 asphericity coefficients 0.00064025

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 7th asphericity coefficient is following:

3 asphericity coefficients 0.00349169

4 asphericity coefficients-0.0466731

5 asphericity coefficients 0.01205908

6 asphericity coefficients 0.00484319

7 asphericity coefficients 0.0027334

8 asphericity coefficients 0.00291589

9 asphericity coefficients-0.0016658

10 asphericity coefficients-0.0001385

11 asphericity coefficients 0.00026746

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 8th asphericity coefficient is following:

3 asphericity coefficients-0.033098

4 asphericity coefficients-0.010901

5 asphericity coefficients 0.00081927

6 asphericity coefficients-0.0108937

7 asphericity coefficients-0.0002148

8 asphericity coefficients 0.00421857

9 asphericity coefficients-0.0001627

10 asphericity coefficients-0.0003782

11 asphericity coefficients 0.0000165

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

The 9th asphericity coefficient is following:

3 asphericity coefficients-0.0180018

4 asphericity coefficients-0.0273204

5 asphericity coefficients 0.00554366

6 asphericity coefficients 0.00061313

7 asphericity coefficients-0.0036058

8 asphericity coefficients-0.0001784

9 asphericity coefficients 0.00089793

10 asphericity coefficients 0.00048247

11 asphericity coefficients-0.0002454

12 asphericity coefficients 0

13 asphericity coefficients 0

14 asphericity coefficients 0

15 asphericity coefficients 0

Each conditional value of the 1st～the 4th embodiment of the present invention is following:

Conditional embodiment 1 embodiment 2 embodiment 3 embodiment 4

f/R1 -0.25 0 0 -0.2

|f2/f| 1.08 0.91 1.06 1.19

f/R4 3.41 3.04 3.16 3.03

(v1+v3)/v2 5.5 4.7 5.3 5.3

Claims (7)

1. phtographic lens, this phtographic lens is to be used to make the small-sized bigbore phtographic lens that on imaging apparatus, forms images from the light of being taken the photograph body, it is characterized in that,

Above-mentioned phtographic lens comprises from object side successively: aperture; The 1st lens with positive light coke; Have negative power and concave surface the 2nd lens towards the picture side; The 3rd lens with positive light coke; And the 4th lens with negative power;

Above-mentioned the 4th lens have negative power and have positive light coke at periphery at the center,

Object side the 1st surface of above-mentioned the 1st lens is concave surface or plane.

2. phtographic lens according to claim 1 is characterized in that,

Conditional below satisfying:

-0.35＜f/R1≤0…(1)

Wherein, f is the focal length of phtographic lens total system, and R1 is the radius-of-curvature on object side the 1st surface of the 1st lens.

3. phtographic lens according to claim 1 is characterized in that,

Conditional below satisfying:

0.90＜|f2/f|＜1.20…(2)

Wherein, f2 is the focal length of the 2nd lens, and f is the focal length of phtographic lens total system.

4. phtographic lens according to claim 2 is characterized in that,

Conditional below satisfying:

0.90＜|f2/f|＜1.20…(2)

Wherein, f2 is the focal length of the 2nd lens, and f is the focal length of phtographic lens total system.

5. according to each described phtographic lens in the claim 1 to 4, it is characterized in that,

Conditional below satisfying:

f/R4＜3.5…(3)

Wherein, R4 is the curvature of the picture side surface of the 2nd lens, and f is the focal length of phtographic lens total system.

6. according to each described phtographic lens in the claim 1 to 4, it is characterized in that,

Conditional below satisfying:

4.4＜(v1+v3)/v2＜5.8…(4)

Wherein, vn is the Abbe number of n lens.

7. phtographic lens according to claim 5 is characterized in that,

Conditional below satisfying:

4.4＜(v1+v3)/v2＜5.8…(4)

Wherein, vn is the Abbe number of n lens.

Images