CN102193168A - Photographic lens system - Google Patents

Abstract

The invention provides a photographic lens system, which, from an object side to an image side, sequentially comprises a first lens with positive refractive forces, a second lens with negative refractive forces, a third lens and a diaphragm, wherein at least one of an object-side surface and an image-side surface of the third lens is provided with at least an inflection point; the diaphragm is arranged between a photographed object and the first lens; the number of the lenses with refractive forces in the photographic lens system is only three; and the focal distance f of the whole photographic lens system, the focal distance f1 of the first lens, the focal distance f2 of the second lens, the curvature radius R1 of the object-side surface of the first lens, the dispersion coefficient V1 of the first lens, and the dispersion coefficient V2 of the second lens satisfy the following formulas: f/f1 is greater than 1.28 and less than 2.0, (R1/f)*100 is greater than 23.0 and less than 33.0, (V1-V2) is greater than 30.5 and less than 46.0, and f/f2 is greater than -0.65 and less than -0.25. Through the configuration mode of the lenses above, the optical aberration can be revised effectively, the imaging quality of the system can be improved, meanwhile, the total optical length of the system is shortened, and the characteristic of lens miniaturization is maintained.

Description

Photographical lens system

Technical field

The invention relates to a kind of Photographical lens system; Particularly about a kind of miniaturization Photographical lens system that is applied to mobile phone and camera.

Background technology

Recent years, rise along with mobile phone camera, the demand of miniaturization phtographic lens day by day improves, and the photo-sensitive cell of general phtographic lens is nothing more than being sensitization coupling element (Charge Coupled Device, CCD) or complementary matal-oxide semiconductor element (Complementary Metal-OxideSemiconductor Sensor, CMOS Sensor) two kind, and along with progressing greatly of manufacture of semiconductor technology, make the Pixel Dimensions of photo-sensitive cell dwindle, adding now, electronic product is a development trend with the good and compact external form of function, therefore, the miniaturization phtographic lens that possesses good image quality becomes main flow in the market.

Common miniaturization phtographic lens, for reducing manufacturing cost, it is main adopting the two-piece type lens arrangement more, yet because of only two lens of tool are limited in one's ability to the revisal of aberration, can't satisfy the photography module demand of higher-order, will cause the camera lens total length to be difficult to reach miniaturization but dispose poly-lens.

In order to obtain good image quality and to have the characteristic of miniaturization concurrently, the Photographical lens system that possesses three lens is feasible scheme.United States Patent (USP) the 6th, 490 has disclosed a kind of phtographic lens of three-chip type lens arrangement No. 102, but its 3rd lens are adopted the configuration with the glass spherical mirror, and the use of spherical lens has reduced the degree of freedom of system's correction off-axis aberration, makes the difficult control of image quality.

In view of this, be badly in need of a kind of frivolous electronic product of taking that can be used for, image quality is good and be unlikely to the Photographical lens system that makes the camera lens total length long.

Summary of the invention

The invention provides a kind of Photographical lens system, extremely comprise in regular turn as side by the thing side: first lens of the positive refracting power of a tool, its thing side surface is a convex surface; Second lens of the negative refracting power of one tool, its thing side surface and be all aspheric surface as side surface; One the 3rd lens, it is a concave surface as side surface, the thing side surface of the 3rd lens and be all aspheric surface as side surface, and the thing side surface of the 3rd lens and be provided with at least one point of inflexion as at least one surface in the side surface; And an aperture, be arranged between object and this first lens; Wherein, the number of lenses of tool refracting power only is three in this Photographical lens system, the focal length of whole Photographical lens system is f, the focal length of these first lens is f1, the focal length of these second lens is f2, and the thing side surface radius-of-curvature of these first lens is R1, and the abbe number of these first lens is V1, the abbe number of these second lens is V2, satisfies following relationship formula: 1.28＜f/f1＜2.0; 23.0＜(R1/f) * 100＜33.0; 30.5＜V1-V2＜46.0;-0.65＜f/f2＜-0.25.

The present invention can effectively revise aberration with the lifting image quality by the configuration mode of above-mentioned mirror group, and can shorten the optics total length of this Photographical lens system simultaneously, keeps the characteristic of camera lens miniaturization.

In the Photographical lens system of the present invention, the positive refracting power of this first lens tool, and its thing side surface is convex surface, can effectively shorten the optics total length of this Photographical lens system; This second lens tool is born refracting power, can help the aberration of update the system; The 3rd lens can be positive refracting power or negative refracting power lens, its effect is as the revisal lens, but balance and every aberration that update the system produced, when the positive refracting power of the 3rd lens tool, can effectively distribute the refracting power of these first lens, to reduce the susceptibility of system, when the 3rd lens tool is born refracting power, the principal point (Principal Point) that then can make optical system helps shortening the optics total length of system, to keep the miniaturization of camera lens away from imaging surface.

In the Photographical lens system of the present invention, biconvex lens or thing side surface that these first lens can be a thing side surface, be all convex surface as side surface are convex surface, are the crescent lens of concave surface as side surface, when these first lens are a biconvex lens, can effectively strengthen the refracting power configuration of these first lens, and then make the optics total length of this Photographical lens system become shorter; When these first lens are the crescent lens of a convex-concave, then comparatively favourable for the astigmatism (Astigmatism) of update the system.The thing side surface of these second lens is concave surface, be convex surface as side surface, can help the astigmatism of update the system.The 3rd lens can be a thing side surface and are convex surface, are the crescent lens of concave surface or thing side surface, are all the biconcave lens of concave surface as side surface as side surface, when the 3rd lens are the crescent lens of a convex-concave, can help the astigmatism and the higher order aberratons of update the system; When the 3rd lens were a biconcave lens, the principal point that can make optical system helped shortening the optics total length of system further from imaging surface, to keep the miniaturization of camera lens.

Photographical lens system of the present invention provides positive refracting power by these first lens, and when aperture placed object side near this Photographical lens system, can effectively shorten the optics total length of this Photographical lens system.In addition, above-mentioned configuration can make the outgoing pupil (Exit Pupil) of this Photographical lens system away from imaging surface, therefore, light will be incident in the mode near vertical incidence on the photo-sensitive cell, this is the heart far away (Telecentric) characteristic of picture side, heart characteristic far away is very important for the photoperceptivity of now solid-state electronic photo-sensitive cell, can make the sensitization susceptibility of sense electronics optical element improve, and the minimizing system produces the possibility at dark angle.In addition, the 3rd lens in the Photographical lens system of the present invention are provided with the point of inflexion, and can more effectively suppress light and be incident in angle on the photo-sensitive cell from the axle visual field, and the further aberration of modified off-axis visual field.In addition, in the Photographical lens system of the present invention, when aperture being placed more near this second lens place, the characteristic that can help Wide-angle, help to receive the correction of poor (Chromatic Aberration of Magnification), and can effectively reduce the susceptibility of this Photographical lens system distorting (Distortion) and multiplying power look.In other words, in the Photographical lens system of the present invention, when aperture being placed more near the object place, focus on heart characteristic far away, the optics total length of whole Photographical lens system can be shorter; When aperture being placed more near this second lens place, then focus on the characteristic of Wide-angle, can effectively reduce the susceptibility of this Photographical lens system.

On the other hand, the invention provides a kind of Photographical lens system, extremely comprise in regular turn as side by the thing side: first lens of the positive refracting power of a tool, its thing side surface is a convex surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface, be convex surface as side surface, and the thing side surface of these second lens and be all aspheric surface as side surface; One the 3rd lens, it is a concave surface as side surface, the thing side surface of the 3rd lens and be all aspheric surface as side surface, and the thing side surface of the 3rd lens and be provided with at least one point of inflexion as at least one surface in the side surface; And an aperture, be arranged between object and this second lens; Wherein, the number of lenses of tool refracting power only is three in this Photographical lens system, the thing side surface radius-of-curvature of these first lens is R1, the focal length of whole Photographical lens system is f, the abbe number of these first lens is V1, and the abbe number of these second lens is V2, and the thickness of these second lens on optical axis is CT2, these second lens and the distance of the 3rd lens on optical axis are T23, satisfy the following relationship formula: 23.0＜(R1/f) * 100＜33.0; 30.5＜V1-V2＜46.0; 2.0＜(CT2/f) * 100＜12.0; 0.10[mm]＜CT2＜0.38[mm]; 10.0＜(T23/f) * 100＜22.0.

Again on the other hand, the invention provides a kind of Photographical lens system, by the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface and be all convex surface as side surface; Second lens of the negative refracting power of one tool, its thing side surface and be all aspheric surface as side surface; One the 3rd lens, its thing side surface are convex surface, be concave surface as side surface, the thing side surface of the 3rd lens and be all aspheric surface, and the thing side surface of the 3rd lens and be provided with at least one point of inflexion as at least one surface in the side surface as side surface; And an aperture, be arranged between object and this second lens; Wherein, the number of lenses of tool refracting power only is three in this Photographical lens system, the focal length of whole Photographical lens system is f, the focal length of these first lens is f1, the abbe number of these first lens is V1, the abbe number of these second lens is V2, and the thickness of these second lens on optical axis is CT2, satisfies following relationship formula: 1.28＜f/f1＜2.0; 30.5＜V1-V2＜46.0; 2.0＜(CT2/f) * 100＜12.0; 0.10[mm]＜CT2＜0.38[mm].

Description of drawings

Fig. 1 is the optical system synoptic diagram of first embodiment of the invention;

Fig. 2 is the aberration curve figure of first embodiment of the invention;

Fig. 3 is the optical system synoptic diagram of second embodiment of the invention;

Fig. 4 is the aberration curve figure of second embodiment of the invention;

Fig. 5 is the optical system synoptic diagram of third embodiment of the invention;

Fig. 6 is the aberration curve figure of third embodiment of the invention;

Fig. 7 is the optical system synoptic diagram of fourth embodiment of the invention;

Fig. 8 is the aberration curve figure of fourth embodiment of the invention;

Fig. 9 is the optical system synoptic diagram of fifth embodiment of the invention;

Figure 10 is the aberration curve figure of fifth embodiment of the invention;

Figure 11 is the optical system synoptic diagram of sixth embodiment of the invention;

Figure 12 is the aberration curve figure of sixth embodiment of the invention;

Figure 13 is the optical system synoptic diagram of seventh embodiment of the invention;

Figure 14 is the aberration curve figure of seventh embodiment of the invention;

Figure 15 is the optical system synoptic diagram of eighth embodiment of the invention;

Figure 16 is the aberration curve figure of eighth embodiment of the invention;

Figure 17 is a table one, is the optical data of first embodiment of the invention;

Figure 18 A and Figure 18 B are respectively table two A and table two B, are the aspherical surface data of first embodiment of the invention;

Figure 19 is a table three, is the optical data of second embodiment of the invention;

Figure 20 A and Figure 20 B are respectively table four A and table four B, are the aspherical surface data of second embodiment of the invention;

Figure 21 is a table five, is the optical data of third embodiment of the invention;

Figure 22 is a table six, is the aspherical surface data of third embodiment of the invention;

Figure 23 is a table seven, is the optical data of fourth embodiment of the invention;

Figure 24 A and Figure 24 B are respectively table eight A and table eight B, are the aspherical surface data of fourth embodiment of the invention;

Figure 25 is a table nine, is the optical data of fifth embodiment of the invention;

Figure 26 is a table ten, is the aspherical surface data of fifth embodiment of the invention;

Figure 27 is a table ten one, is the optical data of sixth embodiment of the invention;

Figure 28 A and Figure 28 B are respectively table ten two A and table ten two B, are the aspherical surface data of sixth embodiment of the invention;

Figure 29 is a table ten three, is the optical data of seventh embodiment of the invention;

Figure 30 A and Figure 30 B are respectively table ten four A and table ten four B, are the aspherical surface data of seventh embodiment of the invention;

Figure 31 is a table ten five, is the optical data of eighth embodiment of the invention;

Figure 32 is a table ten six, is the aspherical surface data of eighth embodiment of the invention;

Figure 33 is a table ten seven, is the numerical data of first embodiment of the invention to the eight embodiment correlationship formulas.

Aperture 100,300,500,700,900,1100,1300,1500

First lens 110,310,510,710,910,1110,1310,1510

Thing side surface 111,311,511,711,911,1111,1311,1511

Picture side surface 112,312,512,712,912,1112,1312,1512

Second lens 120,320,520,720,920,1120,1320,1520

Thing side surface 121,321,521,721,921,1121,1321,1521

Picture side surface 122,322,522,722,922,1122,1322,1522

The 3rd lens 130,330,530,730,930,1130,1330,1530

Thing side surface 131,331,531,731,931,1131,1331,1531

Picture side surface 132,332,532,732,932,1132,1332,1532

Infrared ray filtering optical filter 140,340,540,740,940,1140,1340,1540

Cover glass 550,950

Imaging surface 150,350,560,750,960,1150,1350,1550

The focal length of whole Photographical lens system is f

The focal length of first lens is f1

The focal length of second lens is f2

The focal length of the 3rd lens is f3

The abbe number of first lens is V1

The abbe number of second lens is V2

The thing side surface radius-of-curvature of first lens is R1

First lens be R2 as the side surface radius-of-curvature

The thing side surface radius-of-curvature of the 3rd lens is R5

The 3rd lens be R6 as the side surface radius-of-curvature

Second lens and the distance of the 3rd lens on optical axis are T23

The thickness of second lens on optical axis is CT2

The thing side surface of first lens to the distance of sense electronics optical element on optical axis is TTL

Half of sense electronics optical element effective pixel area diagonal angle line length is ImgH

Embodiment

The invention provides a kind of Photographical lens system, extremely comprise in regular turn as side by the thing side: first lens of the positive refracting power of a tool, its thing side surface is a convex surface; Second lens of the negative refracting power of one tool, its thing side surface and be all aspheric surface as side surface; One the 3rd lens, it is a concave surface as side surface, the thing side surface of the 3rd lens and be all aspheric surface as side surface, and the thing side surface of the 3rd lens and be provided with at least one point of inflexion as at least one surface in the side surface; And an aperture, be arranged between object and this first lens; Wherein, the number of lenses of tool refracting power only is three in this Photographical lens system, the focal length of whole Photographical lens system is f, the focal length of these first lens is f1, the focal length of these second lens is f2, and the thing side surface radius-of-curvature of these first lens is R1, and the abbe number of these first lens is V1, the abbe number of these second lens is V2, satisfies following relationship formula: 1.28＜f/f1＜2.0; 23.0＜(R1/f) * 100＜33.0; 30.5＜V1-V2＜46.0;-0.65＜f/f2＜-0.25.

When aforementioned Photographical lens system satisfies following relationship formula: 1.28＜f/f1＜2.0, can make the refracting power of these first lens dispose comparatively balance, the effective optics total length of control system, keep the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration (High order spherical aberration) simultaneously, and then promote image quality; Preferably, satisfy following relationship formula: 1.33＜f/f1＜1.70.When aforementioned photographic lens system satisfies the following relationship formula: 23.0＜(R1/f) * 100＜33.0, can effectively reduce the optics total length of this Photographical lens system, and can avoid the excessive increase of higher order aberratons; Preferably, satisfy the following relationship formula: 23.0＜(R1/f) * 100＜29.0.When aforementioned Photographical lens system satisfies following relationship formula: 30.5＜V1-V2＜46.0, help the correction of aberration in this Photographical lens system.When aforementioned Photographical lens system satisfies following relationship formula :-0.65＜f/f2＜-0.25, the more effectively correction of aberration in the strengthening system, and can avoid the refracting power of these second lens too strong, and then help to reduce the susceptibility of this Photographical lens system.

In the aforementioned Photographical lens system of the present invention, preferably, these first lens be concave surface as side surface, at this moment, these first lens are that a thing side surface is convex surface, is the meniscus lens of concave surface as side surface, help the astigmatism of update the system; Preferably, the thing side surface of these second lens is concave surface, be convex surface as side surface, can help the astigmatism of update the system; Preferably, the 3rd lens tool is born refracting power, and the principal point that can make optical system helps shortening the optics total length of system away from imaging surface, to keep the miniaturization of camera lens; Preferably, the thing side surface of the 3rd lens is a convex surface, helps the astigmatism and the higher order aberratons of update the system; In addition, preferably, the material of these second lens and the 3rd lens is a plastic cement, not only helps the making of non-spherical lens, more can effectively reduce production costs.

In the aforementioned Photographical lens system of the present invention, preferably, the thing side surface of these first lens and be aspheric surface as at least one surface in the side surface, aspheric surface can be made into the shape beyond the sphere easily, obtain more controlled variable, in order to subduing aberration, and then the number that uses of reduction lens, therefore can effectively reduce the optics total length of Photographical lens system of the present invention, and the image quality of energy elevator system; Preferably, the material of these first lens is a plastic cement, not only helps the making of non-spherical lens, more can effectively reduce production costs.

In the aforementioned Photographical lens system of the present invention, the thickness of these second lens on optical axis is CT2, and the focal length of whole Photographical lens system is f, preferably, satisfies the following relationship formula: 2.0＜(CT2/f) * 100＜12.0; 0.10[mm]＜CT2＜0.38[mm].As (CT2/f) * 100, when CT2 satisfies the above-mentioned relation formula, help mouldability and the homogenieity of eyeglass when plastic rubber ejaculate molding, and help shortening simultaneously the optics total length of system.

In the aforementioned Photographical lens system of the present invention, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens is f3, preferably, satisfies the following relationship formula: 0＜| f/f3|＜0.25.When f/f3 satisfies the above-mentioned relation formula, can make the 3rd lens as the revisal lens, its function is balance and every aberration that update the system produced, helps the astigmatism and the distortion of update the system, improves the resolving power of this Photographical lens system.

In the aforementioned Photographical lens system of the present invention, these second lens and the distance of the 3rd lens on optical axis are T23, and the focal length of whole Photographical lens system is f, preferably, satisfies the following relationship formula: 13.0＜(T23/f) * 100＜20.0.When (T23/f) * 100 satisfies the above-mentioned relation formula, help revising the higher order aberratons of this Photographical lens system.

In the aforementioned Photographical lens system of the present invention, the thing side surface radius-of-curvature of the 3rd lens is R5, the 3rd lens be R6 as the side surface radius-of-curvature, preferably, satisfy following relationship formula: 0.5＜R5/R6＜2.0.When R5/R6 satisfies the above-mentioned relation formula, can make the 3rd lensing such as revisal lens, help the higher order aberratons of update the system, promote image quality.

In the aforementioned Photographical lens system of the present invention, other is provided with a sense electronics optical element for the object imaging thereon, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, preferably, satisfy following relationship formula: TTL/ImgH＜1.85.When TTL/ImgH satisfies the above-mentioned relation formula, help keeping the miniaturization of this Photographical lens system, to be equipped on the frivolous portable electronic product.

On the other hand, the invention provides a kind of Photographical lens system, extremely comprise in regular turn as side by the thing side: first lens of the positive refracting power of a tool, its thing side surface is a convex surface; Second lens of the negative refracting power of one tool, its thing side surface are concave surface, be convex surface as side surface, and the thing side surface of these second lens and be all aspheric surface as side surface; One the 3rd lens, it is a concave surface as side surface, the thing side surface of the 3rd lens and be all aspheric surface as side surface, and the thing side surface of the 3rd lens and be provided with at least one point of inflexion as at least one surface in the side surface; And an aperture, be arranged between object and this second lens; Wherein, the number of lenses of tool refracting power only is three in this Photographical lens system, the thing side surface radius-of-curvature of these first lens is R1, the focal length of whole Photographical lens system is f, the abbe number of these first lens is V1, and the abbe number of these second lens is V2, and the thickness of these second lens on optical axis is CT2, these second lens and the distance of the 3rd lens on optical axis are T23, satisfy the following relationship formula: 23.0＜(R1/f) * 100＜33.0; 30.5＜V1-V2＜46.0; 2.0＜(CT2/f) * 100＜12.0; 0.10[mm]＜CT2＜0.38[mm]; 10.0＜(T23/f) * 100＜22.0.

When aforementioned Photographical lens system satisfies the following relationship formula: 23.0＜(R1/f) * 100＜33.0, can effectively reduce the optics total length of this Photographical lens system, and can avoid the excessive increase of higher order aberratons.When aforementioned Photographical lens system satisfies following relationship formula: 30.5＜V1-V2＜46.0, help the correction of aberration in this Photographical lens system.When aforementioned Photographical lens system satisfies the following relationship formula: 2.0＜(CT2/f) * 100＜12.0; 0.10[mm]＜CT2＜0.38[mm], help mouldability and the homogenieity of eyeglass when plastic rubber ejaculate molding, and help shortening simultaneously the optics total length of system; Preferably, satisfy the following relationship formula: 2.0＜(CT2/f) * 100＜9.0; 0.10[mm]＜CT2＜0.29[mm].When aforementioned Photographical lens system satisfies the following relationship formula: 10.0＜(T23/f) * 100＜22.0 help revising the higher order aberratons of this Photographical lens system; Preferably, satisfy the following relationship formula: 13.0＜(T23/f) * 100＜20.0.

In the aforementioned Photographical lens system of the present invention, preferably, these first lens be concave surface as side surface, and in picture side surface and the thing side surface of these first lens at least one side be aspheric surface, help the astigmatism of update the system; Preferably, the 3rd lens tool is born refracting power, and the principal point that can make optical system helps shortening the optics total length of system away from imaging surface, to keep the miniaturization of camera lens; Preferably, the thing side surface of the 3rd lens is a convex surface, helps the astigmatism and the higher order aberratons of update the system.

In the aforementioned Photographical lens system of the present invention, the focal length of whole Photographical lens system is f, and the focal length of these first lens is f1, preferably, satisfies following relationship formula: 1.28＜f/f1＜2.0.When f/f1 satisfies the above-mentioned relation formula, can make the refracting power of these first lens dispose comparatively balance, effectively the optics total length of control system is kept the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration simultaneously, and then promotes image quality; Preferably, satisfy following relationship formula: 1.33＜f/f1＜1.70.

In the aforementioned Photographical lens system of the present invention, preferably, this aperture is arranged between object and this first lens, so disposes and is beneficial to heart characteristic far away, and the optics total length of whole Photographical lens system can be shorter.

In the aforementioned Photographical lens system of the present invention, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens is f3, preferably, satisfies the following relationship formula: 0＜| f/f3|＜0.25.When f/f3 satisfies the above-mentioned relation formula, can make the 3rd lens as the revisal lens, its function is balance and every aberration that update the system produced, helps the astigmatism and the distortion of update the system, improves the resolving power of this Photographical lens system.

In the aforementioned Photographical lens system of the present invention, the focal length of whole Photographical lens system is f, and the focal length of these second lens is f2, preferably, satisfies following relationship formula :-0.65＜f/f2＜-0.25.When f/f2 satisfies the above-mentioned relation formula, the more effectively correction of aberration in the strengthening system, and can avoid the refracting power of these second lens too strong, and then help to reduce the susceptibility of this Photographical lens system.

In the aforementioned Photographical lens system of the present invention, the thing side surface radius-of-curvature of the 3rd lens is R5, the 3rd lens be R6 as the side surface radius-of-curvature, preferably, satisfy following relationship formula: 0.5＜R5/R6＜2.0.When R5/R6 satisfies the above-mentioned relation formula, can make the 3rd lensing such as revisal lens, help the higher order aberratons of update the system, promote image quality.

In the aforementioned Photographical lens system of the present invention, other is provided with a sense electronics optical element for the object imaging thereon, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, preferably, satisfy following relationship formula: TTL/ImgH＜1.85.When TTL/ImgH satisfies the above-mentioned relation formula, help keeping the miniaturization of this Photographical lens system, to be equipped on the frivolous portable electronic product.

Again on the other hand, the invention provides a kind of Photographical lens system, by the thing side to comprising in regular turn as side: first lens of the positive refracting power of a tool, its thing side surface and be all convex surface as side surface; Second lens of the negative refracting power of one tool, its thing side surface and be all aspheric surface as side surface; One the 3rd lens, its thing side surface are convex surface, be concave surface as side surface, the thing side surface of the 3rd lens and be all aspheric surface, and the thing side surface of the 3rd lens and be provided with at least one point of inflexion as at least one surface in the side surface as side surface; And an aperture, be arranged between object and this second lens; Wherein, the number of lenses of tool refracting power only is three in this Photographical lens system, the focal length of whole Photographical lens system is f, the focal length of these first lens is f1, the abbe number of these first lens is V1, the abbe number of these second lens is V2, and the thickness of these second lens on optical axis is CT2, satisfies following relationship formula: 1.28＜f/f1＜2.0; 30.5＜V1-V2＜46.0; 2.0＜(CT2/f) * 100＜12.0; 0.10[mm]＜CT2＜0.38[mm].

When aforementioned Photographical lens system satisfies following relationship formula: 1.28＜f/f1＜2.0, can make the refracting power of these first lens dispose comparatively balance, the effective optics total length of control system, keep the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration simultaneously, and then promote image quality; Preferably, satisfy following relationship formula: 1.33＜f/f1＜1.70.When aforementioned Photographical lens system satisfies following relationship formula: 30.5＜V1-V2＜46.0, help the correction of aberration in this Photographical lens system.When aforementioned Photographical lens system satisfies the following relationship formula: 2.0＜(CT2/f) * 100＜12.0; 0.10[mm]＜CT2＜0.38[mm], help mouldability and the homogenieity of eyeglass when plastic rubber ejaculate molding, and help shortening simultaneously the optics total length of system; Preferably, satisfy the following relationship formula: 2.0＜(CT2/f) * 100＜9.0; 0.10[mm]＜CT2＜0.29[mm].

In the aforementioned Photographical lens system of the present invention, preferably, the thing side surface of these second lens is concave surface, be convex surface as side surface, can help the astigmatism of update the system; Preferably, the 3rd lens tool is born refracting power, and the principal point that can make optical system helps shortening the optics total length of system away from imaging surface, to keep the miniaturization of camera lens; In addition, preferably, the material of these second lens and the 3rd lens is a plastic cement, not only helps the making of non-spherical lens, more can effectively reduce production costs.

In the aforementioned Photographical lens system of the present invention, preferably, this aperture is arranged between object and this first lens, so disposes and is beneficial to heart characteristic far away, and the optics total length of whole Photographical lens system can be shorter.

In the aforementioned Photographical lens system of the present invention, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens is f3, preferably, satisfies the following relationship formula: 0＜| f/f3|＜0.25.When f/f3 satisfies the above-mentioned relation formula, can make the 3rd lens as the revisal lens, its function is balance and every aberration that update the system produced, helps the astigmatism and the distortion of update the system, improves the resolving power of this Photographical lens system.

In the aforementioned Photographical lens system of the present invention, these second lens and the distance of the 3rd lens on optical axis are T23, and the focal length of whole Photographical lens system is f, preferably, satisfies the following relationship formula: 13.0＜(T23/f) * 100＜20.0.When (T23/f) * 100 satisfies the above-mentioned relation formula, help revising the higher order aberratons of this Photographical lens system.

In the aforementioned Photographical lens system of the present invention, the focal length of whole Photographical lens system is f, and the focal length of these second lens is f2, preferably, satisfies following relationship formula :-0.65＜f/f2＜-0.25.When f/f2 satisfies the above-mentioned relation formula, the more effectively correction of aberration in the strengthening system, and can avoid the refracting power of these second lens too strong, and then help to reduce the susceptibility of this Photographical lens system.

In the aforementioned Photographical lens system of the present invention, the thing side surface radius-of-curvature of the 3rd lens is R5, the 3rd lens be R6 as the side surface radius-of-curvature, preferably, satisfy following relationship formula: 0.5＜R5/R6＜2.0.When R5/R6 satisfies the above-mentioned relation formula, can make the 3rd lensing such as revisal lens, help the higher order aberratons of update the system, promote image quality.

In the aforementioned Photographical lens system of the present invention, other is provided with a sense electronics optical element for the object imaging thereon, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, preferably, satisfy following relationship formula: TTL/ImgH＜1.85.When TTL/ImgH satisfies the above-mentioned relation formula, help keeping the miniaturization of this Photographical lens system, to be equipped on the frivolous portable electronic product.

In the Photographical lens system of the present invention, the material of lens can be glass or plastic cement, if the material of lens is a glass, then can increase the degree of freedom of system's refracting power configuration, if the lens material is a plastic cement, then can effectively reduce production costs.In addition, aspheric surface can be set on minute surface, aspheric surface can be made into the shape beyond the sphere easily, obtain more controlled variable, in order to subduing aberration, and then the number that uses of reduction lens, therefore can effectively reduce the optics total length of Photographical lens system of the present invention.

In the Photographical lens system of the present invention,, represent that then this lens surface is a convex surface in paraxial place if lens surface is a convex surface; If lens surface is a concave surface, represent that then this lens surface is a concave surface in paraxial place.

Photographical lens system of the present invention will cooperate appended graphic detailed description the in detail by following specific embodiment.

" first embodiment "

First embodiment of the invention sees also Fig. 1, and the aberration curve of first embodiment sees also Fig. 2.The Photographical lens system of first embodiment mainly is made of three pieces of lens, is extremely comprised in regular turn as side by the thing side:

First lens 110 of the positive refracting power of one tool, its thing side surface 111 are convex surface, are concave surface as side surface 112, and its material is a plastic cement, the thing side surface 111 of these first lens 110, are all aspheric surface as side surface 112;

Second lens 120 of the negative refracting power of one tool, its thing side surface 121 be concave surface, be convex surface as side surface 122, its material is a plastic cement, the thing side surface 121 of these second lens 120, is all aspheric surface as side surface 122;

The 3rd lens 130 of the negative refracting power of one tool, its thing side surface 131 is convex surface, is concave surface as side surface 132, its material is a plastic cement, the thing side surface 131 of the 3rd lens 130, be all aspheric surface as side surface 132, and the thing side surface 131 of the 3rd lens 130, as all being provided with at least one point of inflexion on the side surface 132;

One aperture 100 places between object and this first lens 110;

Other includes an infrared ray filtering optical filter (IR Filter) 140 and places looking like between a side surface 132 and the imaging surface 150 of the 3rd lens 130; The material of this infrared ray filtering optical filter 140 is that glass and its do not influence the focal length of this Photographical lens system of the present invention.

The equation of above-mentioned aspheric curve is expressed as follows:

$X\left(Y\right)=({\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="HSA00000039095200181.png,HSA00000039095200201.png"\; state="\{\{state\}\}">Y</figure-callout>}}^2/R)/(1+\mathrm{sqrt}(1-(1+k)*{(Y/R)}^2))+\underset{i}{\mathrm{\&Sigma;}}\left(\mathrm{Ai}\right)*\left(Y^i\right)$

Wherein:

X: be the point of Y apart from optical axis on the aspheric surface, itself and the relative height that is tangential on the tangent plane on summit on the aspheric surface optical axis;

Y: the point on the aspheric curve and the distance of optical axis;

K: conical surface coefficient;

Ai: i rank asphericity coefficient.

In the first embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and its relational expression is: f=2.70 (millimeter).

In the first embodiment Photographical lens system, the f-number of whole Photographical lens system (f-number) is Fno, and its relational expression is: Fno=2.80.

In the first embodiment Photographical lens system, half of maximum visual angle is HFOV in the whole Photographical lens system, and its relational expression is: HFOV=32.7 (degree).

In the first embodiment Photographical lens system, the abbe number of these first lens 110 is V1, and the abbe number of these second lens 120 is V2, and its relational expression is: V1-V2=32.5.

In the first embodiment Photographical lens system, the thickness of these second lens 120 on optical axis is CT2, and its relational expression is: CT2=0.280 (millimeter).

In the first embodiment Photographical lens system, the thickness of these second lens 120 on optical axis is CT2, and the focal length of whole Photographical lens system is f, and its relational expression is: (CT2/f) * 100=10.4.

In the first embodiment Photographical lens system, the thing side surface radius-of-curvature of these first lens 110 is R1, and the focal length of whole Photographical lens system is f, and its relational expression is: (R1/f) * 100=28.2.

In the first embodiment Photographical lens system, these second lens 120 are T23 with the distance of the 3rd lens 130 on optical axis, and the focal length of whole Photographical lens system is f, and its relational expression is: (T23/f) * 100=15.0.

In the first embodiment Photographical lens system, the thing side surface radius-of-curvature of the 3rd lens 130 is R5, be R6 as the side surface radius-of-curvature, its relational expression is: R5/R6=1.38.

In the first embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these first lens 110 is f1, and its relational expression is: f/f1=1.39.

In the first embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these second lens 120 is f2, and its relational expression is: f/f2=-0.42.

In the first embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens 130 is f3, and its relational expression is: | f/f3|=0.16.

In the first embodiment Photographical lens system, this Photographical lens system is provided with a sense electronics optical element in these imaging surface 150 places for the object imaging thereon in addition, the thing side surface 111 of these first lens 110 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.62.

The detailed optical data of first embodiment is shown in Figure 17 table one, and its aspherical surface data is shown in table two A and table two B of Figure 18 A and Figure 18 B, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.

" second embodiment "

Second embodiment of the invention sees also Fig. 3, and the aberration curve of second embodiment sees also Fig. 4.The Photographical lens system of second embodiment mainly is made of three pieces of lens, is extremely comprised in regular turn as side by the thing side:

First lens 310 of the positive refracting power of one tool, its thing side surface 311 are convex surface, are concave surface as side surface 312, and its material is a plastic cement, the thing side surface 311 of these first lens 310, are all aspheric surface as side surface 312;

Second lens 320 of the negative refracting power of one tool, its thing side surface 321 be concave surface, be convex surface as side surface 322, its material is a plastic cement, the thing side surface 321 of these second lens 320, is all aspheric surface as side surface 322;

The 3rd lens 330 of the negative refracting power of one tool, its thing side surface 331, be all concave surface as side surface 332, its material is a plastic cement, the thing side surface 331 of the 3rd lens 330, be all aspheric surface as side surface 332, and the thing side surface 331 of the 3rd lens 330, as all being provided with at least one point of inflexion on the side surface 332;

One aperture 300 places between object and this first lens 310;

Other includes an infrared ray filtering optical filter 340 and places looking like between a side surface 332 and the imaging surface 350 of the 3rd lens 330; The material of this infrared ray filtering optical filter 340 is that glass and its do not influence the focal length of this Photographical lens system of the present invention.

The equational expression of the second embodiment aspheric curve is as the form of first embodiment.

In the second embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and its relational expression is: f=3.53 (millimeter).

In the second embodiment Photographical lens system, the f-number of whole Photographical lens system is Fno, and its relational expression is: Fno=2.78.

In the second embodiment Photographical lens system, half of maximum visual angle is HFOV in the whole Photographical lens system, and its relational expression is: HFOV=32.6 (degree).

In the second embodiment Photographical lens system, the abbe number of these first lens 310 is V1, and the abbe number of these second lens 320 is V2, and its relational expression is: V1-V2=32.5.

In the second embodiment Photographical lens system, the thickness of these second lens 320 on optical axis is CT2, and its relational expression is: CT2=0.187 (millimeter).

In the second embodiment Photographical lens system, the thickness of these second lens 320 on optical axis is CT2, and the focal length of whole Photographical lens system is f, and its relational expression is: (CT2/f) * 100=5.3.

In the second embodiment Photographical lens system, the thing side surface radius-of-curvature of these first lens 310 is R1, and the focal length of whole Photographical lens system is f, and its relational expression is: (R1/f) * 100=28.4.

In the second embodiment Photographical lens system, these second lens 320 are T23 with the distance of the 3rd lens 330 on optical axis, and the focal length of whole Photographical lens system is f, and its relational expression is: (T23/f) * 100=14.6.

In the second embodiment Photographical lens system, the thing side surface radius-of-curvature of the 3rd lens 330 is R5, be R6 as the side surface radius-of-curvature, its relational expression is: R5/R6=-9.18.

In the second embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these first lens 310 is f1, and its relational expression is: f/f1=1.44.

In the second embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these second lens 320 is f2, and its relational expression is: f/f2=-0.41.

In the second embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens 330 is f3, and its relational expression is: | f/f3|=0.26.

In the second embodiment Photographical lens system, this Photographical lens system is provided with a sense electronics optical element in these imaging surface 350 places for the object imaging thereon in addition, the thing side surface 311 of these first lens 310 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.69.

The detailed optical data of second embodiment is shown in Figure 19 table three, and its aspherical surface data is shown in table four A and table four B of Figure 20 A and Figure 20 B, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.

" the 3rd embodiment "

Third embodiment of the invention sees also Fig. 5, and the aberration curve of the 3rd embodiment sees also Fig. 6.The Photographical lens system of the 3rd embodiment mainly is made of three pieces of lens, is extremely comprised in regular turn as side by the thing side:

First lens 510 of the positive refracting power of one tool, its thing side surface 511 are convex surface, are concave surface as side surface 512, and its material is a plastic cement, the thing side surface 511 of these first lens 510, are all aspheric surface as side surface 512;

Second lens 520 of the negative refracting power of one tool, its thing side surface 521 be concave surface, be convex surface as side surface 522, its material is a plastic cement, the thing side surface 521 of these second lens 520, is all aspheric surface as side surface 522;

The 3rd lens 530 of the negative refracting power of one tool, its thing side surface 531 is convex surface, is concave surface as side surface 532, its material is a plastic cement, the thing side surface 531 of the 3rd lens 530, be all aspheric surface as side surface 532, and the thing side surface 531 of the 3rd lens 530, as all being provided with at least one point of inflexion on the side surface 532;

One aperture 500 places between this object and first lens 510;

Other includes an infrared ray filtering optical filter 540 and a cover glass (Cover-glass) 550 places between the picture side surface 532 and an imaging surface 560 of the 3rd lens 530 in regular turn; The material of this infrared ray filtering optical filter 540 and this cover glass 550 is that glass and its do not influence the focal length of this Photographical lens system of the present invention.

The equational expression of the 3rd embodiment aspheric curve is as the form of first embodiment.

In the 3rd embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and its relational expression is: f=3.23 (millimeter).

In the 3rd embodiment Photographical lens system, the f-number of whole Photographical lens system is Fno, and its relational expression is: Fno=2.88.

In the 3rd embodiment Photographical lens system, half of maximum visual angle is HFOV in the whole Photographical lens system, and its relational expression is: HFOV=34.9 (degree).

In the 3rd embodiment Photographical lens system, the abbe number of these first lens 510 is V1, and the abbe number of these second lens 520 is V2, and its relational expression is: V1-V2=32.5.

In the 3rd embodiment Photographical lens system, the thickness of these second lens 520 on optical axis is CT2, and its relational expression is: CT2=0.246 (millimeter).

In the 3rd embodiment Photographical lens system, the thickness of these second lens 520 on optical axis is CT2, and the focal length of whole Photographical lens system is f, and its relational expression is: (CT2/f) * 100=7.6.

In the 3rd embodiment Photographical lens system, the thing side surface radius-of-curvature of these first lens 510 is R1, and the focal length of whole Photographical lens system is f, and its relational expression is: (R1/f) * 100=33.2.

In the 3rd embodiment Photographical lens system, these second lens 520 are T23 with the distance of the 3rd lens 530 on optical axis, and the focal length of whole Photographical lens system is f, and its relational expression is: T23/f) * 100=14.7.

In the 3rd embodiment Photographical lens system, the thing side surface radius-of-curvature of the 3rd lens 530 is R5, be R6 as the side surface radius-of-curvature, its relational expression is: R5/R6=1.23.

In the 3rd embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these first lens 510 is f1, and its relational expression is: f/f1=1.33.

In the 3rd embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these second lens 520 is f2, and its relational expression is: f/f2=-0.47.

In the 3rd embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens 530 is f3, and its relational expression is: | f/f3|=0.05.

In the 3rd embodiment Photographical lens system, this Photographical lens system is provided with a sense electronics optical element in these imaging surface 560 places for the object imaging thereon in addition, the thing side surface 511 of these first lens 510 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.61.

The detailed optical data of the 3rd embodiment is shown in Figure 21 table five, and its aspherical surface data is shown in the table six of Figure 22, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.

" the 4th embodiment "

Fourth embodiment of the invention sees also Fig. 7, and the aberration curve of the 4th embodiment sees also Fig. 8.The Photographical lens system of the 4th embodiment mainly is made of three pieces of lens, is extremely comprised in regular turn as side by the thing side:

First lens 710 of the positive refracting power of one tool, its thing side surface 711 are convex surface, are concave surface as side surface 712, and its material is a plastic cement, the thing side surface 711 of these first lens 710, are all aspheric surface as side surface 712;

Second lens 720 of the negative refracting power of one tool, its thing side surface 721 be concave surface, be convex surface as side surface 722, its material is a plastic cement, the thing side surface 721 of these second lens 720, is all aspheric surface as side surface 722;

The 3rd lens 730 of the positive refracting power of one tool, its thing side surface 731 is convex surface, is concave surface as side surface 732, its material is a plastic cement, the thing side surface 731 of the 3rd lens 730, be all aspheric surface as side surface 732, and the thing side surface 731 of the 3rd lens 730, as all being provided with at least one point of inflexion on the side surface 732;

One aperture 700 places between object and this first lens 710;

Other includes an infrared ray filtering optical filter 740 and places looking like between a side surface 732 and the imaging surface 750 of the 3rd lens 730; The material of this infrared ray filtering optical filter 740 is that glass and its do not influence the focal length of this Photographical lens system of the present invention.

The equational expression of the 4th embodiment aspheric curve is as the form of first embodiment.

In the 4th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and its relational expression is: f=3.14 (millimeter).

In the 4th embodiment Photographical lens system, the f-number of whole Photographical lens system is Fno, and its relational expression is: Fno=2.78.

In the 4th embodiment Photographical lens system, half of maximum visual angle is HFOV in the whole Photographical lens system, and its relational expression is: HFOV=35.3 (degree).

In the 4th embodiment Photographical lens system, the abbe number of these first lens 710 is V1, and the abbe number of these second lens 720 is V2, and its relational expression is: V1-V2=32.5.

In the 4th embodiment Photographical lens system, the thickness of these second lens 720 on optical axis is CT2, and its relational expression is: CT2=0.266 (millimeter).

In the 4th embodiment Photographical lens system, the thickness of these second lens 720 on optical axis is CT2, and the focal length of whole Photographical lens system is f, and its relational expression is: (CT2/f) * 100=8.5.

In the 4th embodiment Photographical lens system, the thing side surface radius-of-curvature of these first lens 710 is R1, and the focal length of whole Photographical lens system is f, and its relational expression is: (R1/f) * 100=33.5.

In the 4th embodiment Photographical lens system, these second lens 720 are T23 with the distance of the 3rd lens 730 on optical axis, and the focal length of whole Photographical lens system is f, and its relational expression is: (T23/f) * 100=12.3.

In the 4th embodiment Photographical lens system, the thing side surface radius-of-curvature of the 3rd lens 730 is R5, be R6 as the side surface radius-of-curvature, its relational expression is: R5/R6=1.07.

In the 4th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these first lens 710 is f1, and its relational expression is: f/f1=1.38.

In the 4th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these second lens 720 is f2, and its relational expression is: f/f2=-0.60.

In the 4th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens 730 is f3, and its relational expression is: | f/f3|=0.03.

In the 4th embodiment Photographical lens system, this Photographical lens system is provided with a sense electronics optical element in these imaging surface 750 places for the object imaging thereon in addition, the thing side surface 711 of these first lens 710 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.61.

The detailed optical data of the 4th embodiment is shown in Figure 23 table seven, and its aspherical surface data is shown in table eight A and table eight B of Figure 24 A and Figure 24 B, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.

" the 5th embodiment "

Fifth embodiment of the invention sees also Fig. 9, and the aberration curve of the 5th embodiment sees also Figure 10.The Photographical lens system of the 5th embodiment mainly is made of three pieces of lens, is extremely comprised in regular turn as side by the thing side:

First lens 910 of the positive refracting power of one tool, its thing side surface 911 are convex surface, are concave surface as side surface 912, and its material is a plastic cement, the thing side surface 911 of these first lens 910, are all aspheric surface as side surface 912;

Second lens 920 of the negative refracting power of one tool, its thing side surface 921 be concave surface, be convex surface as side surface 922, its material is a plastic cement, the thing side surface 921 of these second lens 920, is all aspheric surface as side surface 922;

The 3rd lens 930 of the positive refracting power of one tool, its thing side surface 931 is convex surface, is concave surface as side surface 932, its material is a plastic cement, the thing side surface 931 of the 3rd lens 930, be all aspheric surface as side surface 932, and the thing side surface 931 of the 3rd lens 930, as all being provided with at least one point of inflexion on the side surface 932;

One aperture 900 places between these first lens 910 and this second lens 920;

Other includes an infrared ray filtering optical filter 940 and cover glass 950 places between the picture side surface 932 and an imaging surface 960 of the 3rd lens 930 in regular turn; The material of this infrared ray filtering optical filter 940 and cover glass 950 is that glass and its do not influence the focal length of this Photographical lens system of the present invention.

The equational expression of the 5th embodiment aspheric curve is as the form of first embodiment.

In the 5th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and its relational expression is: f=2.57 (millimeter).

In the 5th embodiment Photographical lens system, the f-number of whole Photographical lens system is Fno, and its relational expression is: Fno=2.85.

In the 5th embodiment Photographical lens system, half of maximum visual angle is HFOV in the whole Photographical lens system, and its relational expression is: HFOV=33.0 (degree).

In the 5th embodiment Photographical lens system, the abbe number of these first lens 910 is V1, and the abbe number of these second lens 920 is V2, and its relational expression is: V1-V2=32.5.

In the 5th embodiment Photographical lens system, the thickness of these second lens 920 on optical axis is CT2, and its relational expression is: CT2=0.367 (millimeter).

In the 5th embodiment Photographical lens system, the thickness of these second lens 920 on optical axis is CT2, and the focal length of whole Photographical lens system is f, and its relational expression is: (CT2/f) * 100=14.3.

In the 5th embodiment Photographical lens system, the thing side surface radius-of-curvature of these first lens 910 is R1, and the focal length of whole Photographical lens system is f, and its relational expression is: (R1/f) * 100=27.7.

In the 5th embodiment Photographical lens system, these second lens 920 are T23 with the distance of the 3rd lens 930 on optical axis, and the focal length of whole Photographical lens system is f, and its relational expression is: (T23/f) * 100=8.1.

In the 5th embodiment Photographical lens system, the thing side surface radius-of-curvature of the 3rd lens 930 is R5, be R6 as the side surface radius-of-curvature, its relational expression is: R5/R6=0.56.

In the 5th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these first lens 910 is f1, and its relational expression is: f/f1=1.40.

In the 5th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these second lens 920 is f2, and its relational expression is: f/f2=-0.79.

In the 5th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens 930 is f3, and its relational expression is: | f/f3|=0.37.

In the 5th embodiment Photographical lens system, this Photographical lens system is provided with a sense electronics optical element in these imaging surface 960 places for the object imaging thereon in addition, the thing side surface 911 of these first lens 910 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.77.

The detailed optical data of the 5th embodiment is shown in Figure 25 table nine, and its aspherical surface data is shown in the table ten of Figure 26, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.

" the 6th embodiment "

Sixth embodiment of the invention sees also Figure 11, and the aberration curve of the 6th embodiment sees also Figure 12.The Photographical lens system of the 6th embodiment mainly is made of three pieces of lens, is extremely comprised in regular turn as side by the thing side:

First lens 1110 of the positive refracting power of one tool, its thing side surface 1111 are convex surface, are concave surface as side surface 1112, and its material is a plastic cement, the thing side surface 1111 of these first lens 1110, are all aspheric surface as side surface 1112;

Second lens 1120 of the negative refracting power of one tool, its thing side surface 1121 be concave surface, be convex surface as side surface 1122, its material is a plastic cement, the thing side surface 1121 of these second lens 1120, is all aspheric surface as side surface 1122;

The 3rd lens 1130 of the negative refracting power of one tool, its thing side surface 1131 is convex surface, is concave surface as side surface 1132, its material is a plastic cement, the thing side surface 1131 of the 3rd lens 1130, be all aspheric surface as side surface 1132, and the thing side surface 1131 of the 3rd lens 1130, as all being provided with at least one point of inflexion on the side surface 1132;

One aperture 1100 places between object and this first lens 1110;

Other includes an infrared ray filtering optical filter 1140 and places looking like between a side surface 1132 and the imaging surface 1150 of the 3rd lens 1130; The material of this infrared ray filtering optical filter 1140 is that glass and its do not influence the focal length of this Photographical lens system of the present invention.

The equational expression of the 6th embodiment aspheric curve is as the form of first embodiment.

In the 6th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and its relational expression is: f=3.57 (millimeter).

In the 6th embodiment Photographical lens system, the f-number of whole Photographical lens system is Fno, and its relational expression is: Fno=2.78.

In the 6th embodiment Photographical lens system, half of maximum visual angle is HFOV in the whole Photographical lens system, and its relational expression is: HFOV=32.6 (degree).

In the 6th embodiment Photographical lens system, the abbe number of these first lens 1110 is V1, and the abbe number of these second lens 1120 is V2, and its relational expression is: V1-V2=32.5.

In the 6th embodiment Photographical lens system, the thickness of these second lens 1120 on optical axis is CT2, and its relational expression is: CT2=0.190 (millimeter).

In the 6th embodiment Photographical lens system, the thickness of these second lens 1120 on optical axis is CT2, and the focal length of whole Photographical lens system is f, and its relational expression is: (CT2/f) * 100=5.3.

In the 6th embodiment Photographical lens system, the thing side surface radius-of-curvature of these first lens 1110 is R1, and the focal length of whole Photographical lens system is f, and its relational expression is: (R1/f) * 100=28.1.

In the 6th embodiment Photographical lens system, these second lens 1120 are T23 with the distance of the 3rd lens 1130 on optical axis, and the focal length of whole Photographical lens system is f, and its relational expression is: (T23/f) * 100=14.7.

In the 6th embodiment Photographical lens system, the thing side surface radius-of-curvature of the 3rd lens 1130 is R5, be R6 as the side surface radius-of-curvature, its relational expression is: R5/R6=1.90.

In the 6th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these first lens 1110 is f1, and its relational expression is: f/f1=1.41.

In the 6th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these second lens 1120 is f2, and its relational expression is: f/f2=-0.45.

In the 6th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens 1130 is f3, and its relational expression is: | f/f3|=0.13.

In the 6th embodiment Photographical lens system, this Photographical lens system is provided with a sense electronics optical element in these imaging surface 1150 places for the object imaging thereon in addition, the thing side surface 1111 of these first lens 1110 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.71.

The detailed optical data of the 6th embodiment is shown in Figure 27 table ten one, and its aspherical surface data is shown in table ten two A and table ten two B of Figure 28 A and Figure 28 B, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.

" the 7th embodiment "

Seventh embodiment of the invention sees also Figure 13, and the aberration curve of the 7th embodiment sees also Figure 14.The Photographical lens system of the 7th embodiment mainly is made of three pieces of lens, is extremely comprised in regular turn as side by the thing side:

First lens 1310 of the positive refracting power of one tool, its thing side surface 1311 are convex surface, are concave surface as side surface 1312, and its material is a plastic cement, the thing side surface 1311 of these first lens 1310, are all aspheric surface as side surface 1312;

Second lens 1320 of the negative refracting power of one tool, its thing side surface 1321 be concave surface, be convex surface as side surface 1322, its material is a plastic cement, the thing side surface 1321 of these second lens 1320, is all aspheric surface as side surface 1322;

The 3rd lens 1330 of the positive refracting power of one tool, its thing side surface 1331 is convex surface, is concave surface as side surface 1332, its material is a plastic cement, the thing side surface 1331 of the 3rd lens 1330, be all aspheric surface as side surface 1332, and the thing side surface 1331 of the 3rd lens 1330, as all being provided with at least one point of inflexion on the side surface 1332;

One aperture 1300 places between object and this first lens 1310;

Other includes an infrared ray filtering optical filter 1340 and places looking like between a side surface 1332 and the imaging surface 1350 of the 3rd lens 1330; The material of this infrared ray filtering optical filter 1340 is that glass and its do not influence the focal length of this Photographical lens system of the present invention.

The equational expression of the 7th embodiment aspheric curve is as the form of first embodiment.

In the 7th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and its relational expression is: f=3.05 (millimeter).

In the 7th embodiment Photographical lens system, the f-number of whole Photographical lens system is Fno, and its relational expression is: Fno=2.85.

In the 7th embodiment Photographical lens system, half of maximum visual angle is HFOV in the whole Photographical lens system, and its relational expression is: HFOV=30.0 (degree).

In the 7th embodiment Photographical lens system, the abbe number of these first lens 1310 is V1, and the abbe number of these second lens 1320 is V2, and its relational expression is: V1-V2=32.5.

In the 7th embodiment Photographical lens system, the thickness of these second lens 1320 on optical axis is CT2, and its relational expression is: CT2=0.250 (millimeter).

In the 7th embodiment Photographical lens system, the thickness of these second lens 1320 on optical axis is CT2, and the focal length of whole Photographical lens system is f, and its relational expression is: (CT2/f) * 100=8.2.

In the 7th embodiment Photographical lens system, the thing side surface radius-of-curvature of these first lens 1310 is R1, and the focal length of whole Photographical lens system is f, and its relational expression is: (R1/f) * 100=28.4.

In the 7th embodiment Photographical lens system, these second lens 1320 are T23 with the distance of the 3rd lens 1330 on optical axis, and the focal length of whole Photographical lens system is f, and its relational expression is: (T23/f) * 100=11.8.

In the 7th embodiment Photographical lens system, the thing side surface radius-of-curvature of the 3rd lens 1330 is R5, be R6 as the side surface radius-of-curvature, its relational expression is: R5/R6=0.70.

In the 7th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these first lens 1310 is f1, and its relational expression is: f/f1=1.34.

In the 7th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these second lens 1320 is f2, and its relational expression is: f/f2=-0.64.

In the 7th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens 1330 is f3, and its relational expression is: | f/f3|=0.27.

In the 7th embodiment Photographical lens system, this Photographical lens system is provided with a sense electronics optical element in these imaging surface 1350 places for the object imaging thereon in addition, the thing side surface 1311 of these first lens 1310 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.88.

The detailed optical data of the 7th embodiment is shown in Figure 29 table ten three, and its aspherical surface data is shown in table ten four A and table ten four B of Figure 30 A and Figure 30 B, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.

" the 8th embodiment "

Eighth embodiment of the invention sees also Figure 15, and the aberration curve of the 8th embodiment sees also Figure 26.The Photographical lens system of the 8th embodiment mainly is made of three pieces of lens, is extremely comprised in regular turn as side by the thing side:

First lens 1510 of the positive refracting power of one tool, are all convex surface as side surface 1512 at its thing side surface 1511, and its material is a plastic cement, the thing side surface 1511 of these first lens 1510, are all aspheric surface as side surface 1512;

Second lens 1520 of the negative refracting power of one tool, its thing side surface 1521 be concave surface, be convex surface as side surface 1522, its material is a plastic cement, the thing side surface 1521 of these second lens 1520, is all aspheric surface as side surface 1522;

The 3rd lens 1530 of the negative refracting power of one tool, its thing side surface 1531 is convex surface, is concave surface as side surface 1532, its material is a plastic cement, the thing side surface 1531 of the 3rd lens 1530, be all aspheric surface as side surface 1532, and the thing side surface 1531 of the 3rd lens 1530, as all being provided with at least one point of inflexion on the side surface 1532;

One aperture 1500 places between object and this first lens 1510;

Other includes an infrared ray filtering optical filter 1540 and places looking like between a side surface 1532 and the imaging surface 1550 of the 3rd lens 1530; The material of this infrared ray filtering optical filter 1540 is that glass and its do not influence the focal length of this Photographical lens system of the present invention.

The equational expression of the 8th embodiment aspheric curve is as the form of first embodiment.

In the 8th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and its relational expression is: f=2.90 (millimeter).

In the 8th embodiment Photographical lens system, the f-number of whole Photographical lens system is Fno, and its relational expression is: Fno=2.45.

In the 8th embodiment Photographical lens system, half of maximum visual angle is HFOV in the whole Photographical lens system, and its relational expression is: HFOV=32.4 (degree).

In the 8th embodiment Photographical lens system, the abbe number of these first lens 1510 is V1, and the abbe number of these second lens 1520 is V2, and its relational expression is: V1-V2=32.5.

In the 8th embodiment Photographical lens system, the thickness of these second lens 1520 on optical axis is CT2, and its relational expression is: CT2=0.250 (millimeter).

In the 8th embodiment Photographical lens system, the thickness of these second lens 1520 on optical axis is CT2, and the focal length of whole Photographical lens system is f, and its relational expression is: (CT2/f) * 100=8.6.

In the 8th embodiment Photographical lens system, the thing side surface radius-of-curvature of these first lens 1510 is R1, and the focal length of whole Photographical lens system is f, and its relational expression is: (R1/f) * 100=43.5.

In the 8th embodiment Photographical lens system, these second lens 1520 are T23 with the distance of the 3rd lens 1530 on optical axis, and the focal length of whole Photographical lens system is f, and its relational expression is: (T23/f) * 100=17.1.

In the 8th embodiment Photographical lens system, the thing side surface radius-of-curvature of the 3rd lens 1530 is R5, be R6 as the side surface radius-of-curvature, its relational expression is: R5/R6=1.50.

In the 8th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these first lens 1510 is f1, and its relational expression is: f/f1=1.46.

In the 8th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of these second lens 1520 is f2, and its relational expression is: f/f2=-0.60.

In the 8th embodiment Photographical lens system, the focal length of whole Photographical lens system is f, and the focal length of the 3rd lens 1530 is f3, and its relational expression is: | f/f3|=0.17.

In the 8th embodiment Photographical lens system, this Photographical lens system is provided with a sense electronics optical element in these imaging surface 1550 places for the object imaging thereon in addition, the thing side surface 1511 of these first lens 1510 to the distance of this sense electronics optical element on optical axis is TTL, and half of this sense electronics optical element effective pixel area diagonal angle line length is ImgH, and its relational expression is: TTL/ImgH=1.82.

The detailed optical data of the 8th embodiment is shown in Figure 31 table ten five, and its aspherical surface data is shown in the table ten six of Figure 32, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as half of maximum visual angle.

Table one is depicted as the different numerical value change tables of Photographical lens system embodiment of the present invention to table ten six (corresponding Figure 17 to Figure 32 respectively); the all true gained of testing of numerical value change of right each embodiment of the present invention; even use different numerical value; the product of same structure must belong to protection category of the present invention; so above explanation is described and graphic only as exemplary, non-in order to limit claim of the present invention.Table ten seven (corresponding Figure 33) is the numerical data of the corresponding correlationship formula of the present invention of each embodiment.

Claims (29)

1. a Photographical lens system is characterized in that, described Photographical lens system is extremely comprised as side in regular turn by the thing side:

First lens of the positive refracting power of one tool, its thing side surface is a convex surface;

Second lens of the negative refracting power of one tool, its thing side surface and be all aspheric surface as side surface;

One the 3rd lens, it is a concave surface as side surface, the thing side surface of described the 3rd lens and be all aspheric surface as side surface, and the thing side surface of described the 3rd lens and be provided with at least one point of inflexion as at least one surface in the side surface; And

One aperture is arranged between object and described first lens;

Wherein, the number of lenses of tool refracting power only is three in the described Photographical lens system, the focal length of whole Photographical lens system is f, the focal length of described first lens is f1, the focal length of described second lens is f2, and the thing side surface radius-of-curvature of described first lens is R1, and the abbe number of described first lens is V1, the abbe number of described second lens is V2, satisfies the following relationship formula:

1.28＜f/f1＜2.0；

23.0＜(R1/f)*100＜33.0；

30.5＜V1-V2＜46.0；

-0.65＜f/f2＜-0.25。

2. Photographical lens system as claimed in claim 1 is characterized in that, the thing side surface of described second lens is concave surface, be convex surface as side surface, and the material of described second lens and described the 3rd lens is all plastic cement.

3. Photographical lens system as claimed in claim 2 is characterized in that, described first lens be concave surface as side surface.

4. Photographical lens system as claimed in claim 3 is characterized in that, the thing side surface of described first lens and be aspheric surface as at least one surface in the side surface, and the material of described first lens is a plastic cement.

5. Photographical lens system as claimed in claim 3 is characterized in that, the thing side surface radius-of-curvature of described first lens is R1, and the focal length of whole Photographical lens system is f, satisfies the following relationship formula:

23.0＜(R1/f)*100＜29.0。

6. Photographical lens system as claimed in claim 5 is characterized in that, the thickness of described second lens on optical axis is CT2, and the focal length of whole Photographical lens system is f, satisfies the following relationship formula:

2.0＜(CT2/f)*100＜12.0；

0.10[mm]＜CT2＜0.38[mm]。

7. Photographical lens system as claimed in claim 5 is characterized in that, the focal length of whole Photographical lens system is f, and the focal length of described first lens is f1, satisfies the following relationship formula:

1.33＜f/f1＜1.70。

8. Photographical lens system as claimed in claim 5 is characterized in that, described the 3rd lens tool is born refracting power, and the thing side surface of described the 3rd lens is a convex surface, the focal length of whole Photographical lens system is f, and the focal length of described the 3rd lens is f3, satisfies the following relationship formula:

0＜|f/f3|＜0.25。

9. Photographical lens system as claimed in claim 8, it is characterized in that, described second lens and the distance of described the 3rd lens on optical axis are T23, the focal length of whole Photographical lens system is f, the thing side surface radius-of-curvature of described the 3rd lens is R5, described the 3rd lens be R6 as the side surface radius-of-curvature, satisfy the following relationship formula:

13.0＜(T23/f)*100＜20.0；

0.5＜R5/R6＜2.0。

10. Photographical lens system as claimed in claim 3, it is characterized in that, described Photographical lens system is provided with a sense electronics optical element for the object imaging thereon in addition, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, and half of described sense electronics optical element effective pixel area diagonal angle line length is ImgH, satisfies the following relationship formula:

TTL/ImgH＜1.85。

11. a Photographical lens system is characterized in that, described Photographical lens system is extremely comprised as side in regular turn by the thing side:

First lens of the positive refracting power of one tool, its thing side surface is a convex surface;

Second lens of the negative refracting power of one tool, its thing side surface are concave surface, be convex surface as side surface, and the thing side surface of described second lens and be all aspheric surface as side surface;

One the 3rd lens, it is a concave surface as side surface, the thing side surface of described the 3rd lens and be all aspheric surface as side surface, and the thing side surface of described the 3rd lens and be provided with at least one point of inflexion as at least one surface in the side surface; And

One aperture is arranged between object and described second lens;

Wherein, the number of lenses of tool refracting power only is three in the described Photographical lens system, the thing side surface radius-of-curvature of described first lens is R1, the focal length of whole Photographical lens system is f, the abbe number of described first lens is V1, and the abbe number of described second lens is V2, and the thickness of described second lens on optical axis is CT2, described second lens and the distance of described the 3rd lens on optical axis are T23, satisfy the following relationship formula:

23.0＜(R1/f)*100＜33.0；

30.5＜V1-V2＜46.0；

2.0＜(CT2/f)*100＜12.0；

0.10[mm]＜CT2＜0.38[mm]；

10.0＜(T23/f)*100＜22.0。

12. Photographical lens system as claimed in claim 11 is characterized in that, described first lens be concave surface as side surface, and the thing side surface of described first lens and be aspheric surface as at least one surface in the side surface.

13. Photographical lens system as claimed in claim 12 is characterized in that, the focal length of whole Photographical lens system is f, and the focal length of described first lens is f1, satisfies the following relationship formula:

1.28＜f/f1＜2.0。

14. Photographical lens system as claimed in claim 13 is characterized in that, described the 3rd lens tool is born refracting power, and the thing side surface of described the 3rd lens is a convex surface.

15. Photographical lens system as claimed in claim 14 is characterized in that, the thickness of described second lens on optical axis is CT2, and the focal length of whole Photographical lens system is f, satisfies the following relationship formula:

2.0＜(CT2/f)*100＜9.0；

0.10[mm]＜CT2＜0.29[mm]。

16. Photographical lens system as claimed in claim 15 is characterized in that, described aperture is arranged between object and described first lens.

17. Photographical lens system as claimed in claim 16 is characterized in that, the focal length of whole Photographical lens system is f, and the focal length of described first lens is f1, satisfies the following relationship formula:

1.33＜f/f1＜1.70。

18. Photographical lens system as claimed in claim 16 is characterized in that, the focal length of whole Photographical lens system is f, and the focal length of described the 3rd lens is f3, and described second lens and the distance of described the 3rd lens on optical axis are T23, satisfy the following relationship formula:

0＜|f/f3|＜0.25；

13.0＜(T23/f)*100＜20.0。

19. Photographical lens system as claimed in claim 18, it is characterized in that, the focal length of whole Photographical lens system is f, the focal length of described second lens is f2, the thing side surface radius-of-curvature of described the 3rd lens is R5, described the 3rd lens be R6 as the side surface radius-of-curvature, satisfy the following relationship formula:

-0.65＜f/f2＜-0.25；

0.5＜R5/R6＜2.0。

20. Photographical lens system as claimed in claim 11, it is characterized in that, described Photographical lens system is provided with a sense electronics optical element for the object imaging thereon in addition, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, and half of described sense electronics optical element effective pixel area diagonal angle line length is ImgH, satisfies the following relationship formula:

TTL/ImgH＜1.85。

21. a Photographical lens system is characterized in that, described Photographical lens system is extremely comprised as side in regular turn by the thing side:

First lens of the positive refracting power of one tool, its thing side surface and be all convex surface as side surface;

Second lens of the negative refracting power of one tool, its thing side surface and be all aspheric surface as side surface;

One the 3rd lens, its thing side surface are convex surface, be concave surface as side surface, the thing side surface of described the 3rd lens and be all aspheric surface, and the thing side surface of described the 3rd lens and be provided with at least one point of inflexion as at least one surface in the side surface as side surface; And

One aperture is arranged between object and described second lens;

Wherein, the number of lenses of tool refracting power only is three in the described Photographical lens system, the focal length of whole Photographical lens system is f, the focal length of described first lens is f1, the abbe number of described first lens is V1, the abbe number of described second lens is V2, and the thickness of described second lens on optical axis is CT2, satisfies the following relationship formula:

1.28＜f/f1＜2.0；

30.5＜V1-V2＜46.0；

2.0＜(CT2/f)*100＜12.0；

0.10[mm]＜CT2＜0.38[mm]。

22. Photographical lens system as claimed in claim 21 is characterized in that, the thing side surface of described second lens is concave surface, be convex surface as side surface, and the material of described second lens and the 3rd lens is all plastic cement.

23. Photographical lens system as claimed in claim 22 is characterized in that, described aperture is arranged between object and described first lens.

24. Photographical lens system as claimed in claim 23 is characterized in that, described the 3rd lens tool is born refracting power.

25. Photographical lens system as claimed in claim 24 is characterized in that, the focal length of whole Photographical lens system is f, and the focal length of described first lens is f1, satisfies the following relationship formula:

1.33＜f/f1＜1.70。

26. Photographical lens system as claimed in claim 25 is characterized in that, the focal length of whole Photographical lens system is f, and the focal length of described the 3rd lens is f3, and described second lens and the distance of described the 3rd lens on optical axis are T23, satisfy the following relationship formula:

0＜|f/f3|＜0.25；

13.0＜(T23/f)*100＜20.0。

27. Photographical lens system as claimed in claim 26, it is characterized in that, the focal length of whole Photographical lens system is f, the focal length of described second lens is f2, the thing side surface radius-of-curvature of described the 3rd lens is R5, described the 3rd lens be R6 as the side surface radius-of-curvature, satisfy the following relationship formula:

-0.65＜f/f2＜-0.25；

0.5＜R5/R6＜2.0。

28. Photographical lens system as claimed in claim 23 is characterized in that, the thickness of described second lens on optical axis is CT2, and the focal length of whole Photographical lens system is f, satisfies the following relationship formula:

2.0＜(CT2/f)*100＜9.0；

0.10[mm]＜CT2＜0.29[mm]。

29. Photographical lens system as claimed in claim 21, it is characterized in that, described Photographical lens system is provided with a sense electronics optical element for the object imaging thereon in addition, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, and half of described sense electronics optical element effective pixel area diagonal angle line length is ImgH, satisfies the following relationship formula:

TTL/ImgH＜1.85。

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