CN102736226B

CN102736226B - Photographic lens system

Info

Publication number: CN102736226B
Application number: CN201210175545.7A
Authority: CN
Inventors: 汤相岐; 蔡宗翰
Original assignee: Largan Precision Co Ltd
Current assignee: Largan Precision Co Ltd
Priority date: 2010-03-04
Filing date: 2010-03-04
Publication date: 2014-06-04
Anticipated expiration: 2030-03-04
Also published as: CN102736226A

Abstract

The invention provides a photographic lens system, orderly comprising the following components from the objective side to the image side: a first lens, a second lens, a third lens and an aperture, wherein the first lens has a positive refractive power; the second lens and the third lens have negative refractive powers; at least one point of inflexion is formed on at least one surface in the object side surface and the image side surface of the third lens; and three lenses having the refractive power in the photographic lens system are arranged between a subject and the second lens; the focal length of the integrated photographic lens system is f; the focal length of the first lens is f1; the dispersion coefficient of the first lens is V1, while the dispersion coefficient of the second lens is V2; the thickness of the second lens on an optical axis is CT2; and the satisfied relational expression is as follows: 1.28<f/f1<2.0, 30.5<(V1-V2)<46.0, 2.0<(CT2/f)*100<12.0, and 0.10 mm<CT2<0.38mm. Through the lens group arrangement, the aberration can be corrected effectively to improve the quality of imaging of the system, and simultaneously, the optical overall length of the system is shortened and the miniaturization characteristic of the lens is maintained.

Description

Photographical lens system

The application is to be on March 4th, 2010 applying date, and application number is 2010101294678, and denomination of invention is the divisional application of the patented claim of " 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, along with the rise of 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, or complementary matal-oxide semiconductor element (Complementary Metal-Oxide Semiconductor Sensor CCD), CMOS Sensor) two kinds, and along with progressing greatly of manufacture of semiconductor technology, the Pixel Dimensions of photo-sensitive cell is dwindled, add electronic product now take the good and compact external form of function as development trend, 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 two-piece type lens arrangement more, but because only two lens of tool are limited in one's ability to the correction of aberration, cannot meet the photography module demand of higher-order, will cause camera lens total length to be difficult to reach miniaturization but configure 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, has disclosed a kind of phtographic lens of three-chip type lens arrangement 490, No. 102, but its 3rd lens are adopted the configuration with glass spherical mirror, and the use of spherical lens has reduced the degree of freedom of system correction off-axis aberration, makes the more 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 camera lens total length long.

Summary of the invention

The invention provides a kind of Photographical lens system, extremely sequentially comprised as side by thing side: the first lens of the positive refracting power of a tool, its thing side surface is convex surface; The 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 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 side surface; And an aperture, be arranged between object and this first lens; Wherein, in this Photographical lens system, the number of lenses of tool refracting power is only three, the focal length of entirety Photographical lens system is f, the focal length of this first lens is f1, the focal length of these the second lens is f2, and the thing side surface radius-of-curvature of this first lens is R1, and the abbe number of this first lens is V1, the abbe number of these the second lens is V2, meets following relationship: 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, by the configuration mode of above-mentioned mirror group, can effectively revise aberration to promote image quality, and can shorten the optics total length of this Photographical lens system simultaneously, maintains the characteristic of camera lens miniaturization.

In 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 be conducive to the aberration of update the system; The 3rd lens can be positive refracting power or negative refracting power lens, its effect is as correction lens, can balance and every aberration of producing of update the system, in the time of the positive refracting power of the 3rd lens tool, can effectively distribute the refracting power of this first lens, to reduce the susceptibility of system, in the time of the negative refracting power of the 3rd lens tool, can make the principal point (Principal Point) of optical system away from imaging surface, be conducive to shorten the optics total length of system, to maintain the miniaturization of camera lens.

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

Photographical lens system of the present invention provides positive refracting power by this first lens, and when aperture is placed in to the object side that approaches 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 on photo-sensitive cell in the mode that approaches vertical incidence, this is the heart far away (Telecentric) characteristic of picture side, heart characteristic far away is very important for the photoperceptivity of solid-state electronic photo-sensitive cell now, can make the sensitization susceptibility of sense electronics optical element improve, and minimizing system produces the possibility at dark angle.In addition, on the 3rd lens in Photographical lens system of the present invention, be provided with the point of inflexion, can more effectively suppress from the light of axle visual field and be incident in the angle on photo-sensitive cell, and the further aberration of modified off-axis visual field.In addition, in Photographical lens system of the present invention, when being placed in, aperture more approaches this second lens place, can be conducive to the characteristic of Wide-angle, contribute to receive distorting (Distortion) and multiplying power look the correction of poor (Chromatic Aberration of Magnification), and can effectively reduce the susceptibility of this Photographical lens system.In other words, in Photographical lens system of the present invention, when aperture is placed in and more approaches object place, focus on heart characteristic far away, the optics total length of overall Photographical lens system can be shorter; More approach this second lens place when aperture is placed in, 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 sequentially comprised as side by thing side: the first lens of the positive refracting power of a tool, its thing side surface is convex surface; The second lens of the negative refracting power of one tool, its thing side surface is concave surface, is convex surface as side surface, and the thing side surface of these the second lens and be all aspheric surface as side surface; One the 3rd lens, it is 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 side surface; And an aperture, be arranged between object and this second lens; Wherein, in this Photographical lens system, the number of lenses of tool refracting power is only three, the thing side surface radius-of-curvature of this first lens is R1, the focal length of entirety Photographical lens system is f, the abbe number of this first lens is V1, the abbe number of these the second lens is V2, the thickness of these the second lens on optical axis is CT2, these second lens and the distance of the 3rd lens on optical axis are T23, meet following relationship: 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 thing side to sequentially comprising as side: the first lens of the positive refracting power of a tool, its thing side surface and be all convex surface as side surface; The 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 is convex surface, is 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 side surface; And an aperture, be arranged between object and this second lens; Wherein, in this Photographical lens system, the number of lenses of tool refracting power is only three, the focal length of entirety Photographical lens system is f, the focal length of this first lens is f1, the abbe number of this first lens is V1, the abbe number of these the second lens is V2, and the thickness of these the second lens on optical axis is CT2, meets following relationship: 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].

Accompanying drawing explanation

Fig. 1 is the optical system schematic 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 schematic 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 schematic 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 schematic 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 schematic 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 schematic 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 schematic 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 schematic diagram of eighth embodiment of the invention;

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

Figure 17 is 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 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 table five, is the optical data of third embodiment of the invention;

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

Figure 23 is 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 table nine, is the optical data of fifth embodiment of the invention;

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

Figure 27 is 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 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 table ten five, is the optical data of eighth embodiment of the invention;

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

Figure 33 is 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

The 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 entirety Photographical lens system is f

The focal length of first lens is f1

The focal length of the 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 the second lens is V2

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

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

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

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

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

The thickness of the 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

The half of sense electronics optical element effective pixel area diagonal line length is ImgH

Embodiment

When aforementioned Photographical lens system meets following relationship: 1.28<f/f1<2.0, can make the refracting power of this first lens configure comparatively balance, the effectively optics total length of control system, maintain 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, meet following relationship: 1.33<f/f1<1.70.When aforementioned photographic lens system meets following relationship: 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, meet following relationship: 23.0< (R1/f) * 100<29.0.When aforementioned Photographical lens system meets following relationship: 30.5<V1-V2<46.0, is conducive to the correction of aberration in this Photographical lens system.When aforementioned Photographical lens system meets following relationship :-0.65<f/f2<-0.25, the more effectively correction of aberration in strengthening system, and can avoid the refracting power of these the second lens too strong, and then contribute to reduce the susceptibility of this Photographical lens system.

In the aforementioned Photographical lens system of the present invention, preferably, this first lens be concave surface as side surface, now, this first lens is that a thing side surface is convex surface, the meniscus lens that are concave surface as side surface, is conducive to the astigmatism of update the system; Preferably, the thing side surface of these the second lens is concave surface, is convex surface as side surface, can be conducive to the astigmatism of update the system; Preferably, the 3rd lens tool is born refracting power, can make the principal point of optical system away from imaging surface, is conducive to shorten the optics total length of system, to maintain the miniaturization of camera lens; Preferably, the thing side surface of the 3rd lens is convex surface, contributes to astigmatism and the higher order aberratons of update the system; In addition, preferably, the material of these second lens and the 3rd lens is plastic cement, is not only conducive to 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 this first lens and be aspheric surface as at least one surface in side surface, aspheric surface can easily be made into the shape beyond sphere, obtain more controlled variable, in order to subdue aberration, and then the number of reduction lens use, therefore can effectively reduce the optics total length of Photographical lens system of the present invention, and the image quality of energy Hoisting System; Preferably, the material of this first lens is plastic cement, is not only conducive to 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 the second lens on optical axis is CT2, the focal length of entirety Photographical lens system is f, preferably, meets following relationship: 2.0< (CT2/f) * 100<12.0; 0.10[mm] <CT2<0.38[mm].In the time that (CT2/f) * 100, CT2 meet above-mentioned relation formula, be conducive to mouldability and the homogenieity of eyeglass in the time of plastic rubber ejaculate molding, and be conducive to shorten the optics total length of system simultaneously.

In the aforementioned Photographical lens system of the present invention, the focal length of overall Photographical lens system is f, and the focal length of the 3rd lens is f3, preferably, meets following relationship: 0<|f/f3|<0.25.In the time that f/f3 meets above-mentioned relation formula, can make the 3rd lens as correction lens, its function, for every aberration that balance and update the system produce, is conducive to 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, the focal length of entirety Photographical lens system is f, preferably, meets following relationship: 13.0< (T23/f) * 100<20.0.In the time that (T23/f) * 100 meets above-mentioned relation formula, be conducive to revise 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 side surface radius-of-curvature, preferably, meet following relationship: 0.5<R5/R6<2.0.In the time that R5/R6 meets above-mentioned relation formula, can make the 3rd lensing as correction lens, be conducive to the higher order aberratons of update the system, promote image quality.

In the aforementioned Photographical lens system of the present invention, one sense electronics optical element is separately set for object imaging thereon, the thing side surface of this first lens to the distance of this sense electronics optical element on optical axis is TTL, and the half of this sense electronics optical element effective pixel area diagonal line length is ImgH, preferably, meet following relationship: TTL/ImgH<1.85.In the time that TTL/ImgH meets above-mentioned relation formula, be conducive to maintain the miniaturization of this Photographical lens system, to be equipped on frivolous portable electronic product.

When aforementioned Photographical lens system meets following relationship: 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 meets following relationship: 30.5<V1-V2<46.0, is conducive to the correction of aberration in this Photographical lens system.When aforementioned Photographical lens system meets following relationship: 2.0< (CT2/f) * 100<12.0; 0.10[mm] <CT2<0.38[mm], be conducive to mouldability and the homogenieity of eyeglass in the time of plastic rubber ejaculate molding, and be conducive to shorten the optics total length of system simultaneously; Preferably, meet following relationship: 2.0< (CT2/f) * 100<9.0; 0.10[mm] <CT2<0.29[mm].When aforementioned Photographical lens system meets following relationship: 10.0< (T23/f) * 100<22.0, is conducive to revise the higher order aberratons of this Photographical lens system; Preferably, meet following relationship: 13.0< (T23/f) * 100<20.0.

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

In the aforementioned Photographical lens system of the present invention, the focal length of overall Photographical lens system is f, and the focal length of this first lens is f1, preferably, meets following relationship: 1.28<f/f1<2.0.In the time that f/f1 meets above-mentioned relation formula, can make the refracting power of this first lens configure comparatively balance, the effectively optics total length of control system, maintains the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration simultaneously, and then promotes image quality; Preferably, meet following relationship: 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 overall Photographical lens system can be shorter.

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

When aforementioned Photographical lens system meets following relationship: 1.28<f/f1<2.0, can make the refracting power of this first lens configure comparatively balance, the effectively optics total length of control system, maintain the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration simultaneously, and then promote image quality; Preferably, meet following relationship: 1.33<f/f1<1.70.When aforementioned Photographical lens system meets following relationship: 30.5<V1-V2<46.0, is conducive to the correction of aberration in this Photographical lens system.When aforementioned Photographical lens system meets following relationship: 2.0< (CT2/f) * 100<12.0; 0.10[mm] <CT2<0.38[mm], be conducive to mouldability and the homogenieity of eyeglass in the time of plastic rubber ejaculate molding, and be conducive to shorten the optics total length of system simultaneously; Preferably, meet following relationship: 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 the second lens is concave surface, is convex surface as side surface, can be conducive to the astigmatism of update the system; Preferably, the 3rd lens tool is born refracting power, can make the principal point of optical system away from imaging surface, is conducive to shorten the optics total length of system, to maintain the miniaturization of camera lens; In addition, preferably, the material of these second lens and the 3rd lens is plastic cement, is not only conducive to the making of non-spherical lens, more can effectively reduce production costs.

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

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

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

" the first embodiment "

First embodiment of the invention refers to Fig. 1, and the aberration curve of the first embodiment refers to Fig. 2.The Photographical lens system of the first embodiment is mainly made up of three pieces of lens, is extremely sequentially comprised as side by thing side:

The first lens 110 of the positive refracting power of one tool, its thing side surface 111 is convex surface, is concave surface as side surface 112, its material is plastic cement, the thing side surface 111 of this first lens 110, is all aspheric surface as side surface 112;

The second lens 120 of the negative refracting power of one tool, its thing side surface 121 be concave surface, is convex surface as side surface 122, its material is plastic cement, the thing side surface 121 of these the 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 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 being all provided with at least one point of inflexion on side surface 132;

One aperture 100 is placed between object and this first lens 110;

Separately include an infrared ray filtering optical filter (IR Filter) 140 and be placed in looking like between side surface 132 and an imaging surface 150 of the 3rd lens 130; The material of this infrared ray filtering optical filter 140 is the focal length that glass and its do not affect this Photographical lens system of the present invention.

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

X (Y) = (Y^{2} / R) / (1 + sqrt (1 - (1 + k) * {(Y / R)}^{2})) + \underset{i}{Σ} (Ai) * (Y^{i})

Wherein:

X: the point that in aspheric surface, distance optical axis is Y, itself and the relative height that is tangential on the tangent plane on summit on aspheric surface optical axis;

Y: the point in 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 overall Photographical lens system is f, and its relational expression is: f=2.70 (millimeter).

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

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

In the first embodiment Photographical lens system, the abbe number of this first lens 110 is V1, and the abbe number of these the 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 the 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 the second lens 120 on optical axis is CT2, and the focal length of overall 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 this first lens 110 is R1, and the focal length of overall 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 overall 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, is R6 as side surface radius-of-curvature, and its relational expression is: R5/R6=1.38.

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

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

" the second embodiment "

Second embodiment of the invention refers to Fig. 3, and the aberration curve of the second embodiment refers to Fig. 4.The Photographical lens system of the second embodiment is mainly made up of three pieces of lens, is extremely sequentially comprised as side by thing side:

The first lens 310 of the positive refracting power of one tool, its thing side surface 311 is convex surface, is concave surface as side surface 312, its material is plastic cement, the thing side surface 311 of this first lens 310, is all aspheric surface as side surface 312;

The second lens 320 of the negative refracting power of one tool, its thing side surface 321 be concave surface, is convex surface as side surface 322, its material is plastic cement, the thing side surface 321 of these the 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 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 being all provided with at least one point of inflexion on side surface 332;

One aperture 300 is placed between object and this first lens 310;

Separately include an infrared ray filtering optical filter 340 and be placed in looking like between side surface 332 and an imaging surface 350 of the 3rd lens 330; The material of this infrared ray filtering optical filter 340 is the focal length that glass and its do not affect this Photographical lens system of the present invention.

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

In the second embodiment Photographical lens system, the focal length of overall 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 overall Photographical lens system is Fno, and its relational expression is: Fno=2.78.

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

In the second embodiment Photographical lens system, the abbe number of this first lens 310 is V1, and the abbe number of these the 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 the 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 the second lens 320 on optical axis is CT2, and the focal length of overall 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 this first lens 310 is R1, and the focal length of overall 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 overall 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, is R6 as side surface radius-of-curvature, and its relational expression is: R5/R6=-9.18.

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

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

" the 3rd embodiment "

Third embodiment of the invention refers to Fig. 5, and the aberration curve of the 3rd embodiment refers to Fig. 6.The Photographical lens system of the 3rd embodiment is mainly made up of three pieces of lens, is extremely sequentially comprised as side by thing side:

The first lens 510 of the positive refracting power of one tool, its thing side surface 511 is convex surface, is concave surface as side surface 512, its material is plastic cement, the thing side surface 511 of this first lens 510, is all aspheric surface as side surface 512;

The second lens 520 of the negative refracting power of one tool, its thing side surface 521 be concave surface, is convex surface as side surface 522, its material is plastic cement, the thing side surface 521 of these the 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 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 being all provided with at least one point of inflexion on side surface 532;

One aperture 500 is placed between this object and first lens 510;

Separately include an infrared ray filtering optical filter 540 and a cover glass (Cover-glass) 550 and be sequentially placed in looking like between side surface 532 and an imaging surface 560 of the 3rd lens 530; The material of this infrared ray filtering optical filter 540 and this cover glass 550 is the focal length that glass and its do not affect this Photographical lens system of the present invention.

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

In the 3rd embodiment Photographical lens system, the focal length of overall 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 overall Photographical lens system is Fno, and its relational expression is: Fno=2.88.

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

In the 3rd embodiment Photographical lens system, the abbe number of this first lens 510 is V1, and the abbe number of these the 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 the 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 the second lens 520 on optical axis is CT2, and the focal length of overall 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 this first lens 510 is R1, and the focal length of overall 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 overall 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, is R6 as side surface radius-of-curvature, and its relational expression is: R5/R6=1.23.

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

The detailed optical data of the 3rd embodiment is as shown in Figure 21 table five, and its aspherical surface data is as 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 the half at maximum visual angle.

" the 4th embodiment "

Fourth embodiment of the invention refers to Fig. 7, and the aberration curve of the 4th embodiment refers to Fig. 8.The Photographical lens system of the 4th embodiment is mainly made up of three pieces of lens, is extremely sequentially comprised as side by thing side:

The first lens 710 of the positive refracting power of one tool, its thing side surface 711 is convex surface, is concave surface as side surface 712, its material is plastic cement, the thing side surface 711 of this first lens 710, is all aspheric surface as side surface 712;

The second lens 720 of the negative refracting power of one tool, its thing side surface 721 be concave surface, is convex surface as side surface 722, its material is plastic cement, the thing side surface 721 of these the 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 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 being all provided with at least one point of inflexion on side surface 732;

One aperture 700 is placed between object and this first lens 710;

Separately include an infrared ray filtering optical filter 740 and be placed in looking like between side surface 732 and an imaging surface 750 of the 3rd lens 730; The material of this infrared ray filtering optical filter 740 is the focal length that glass and its do not affect this Photographical lens system of the present invention.

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

In the 4th embodiment Photographical lens system, the focal length of overall 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 overall Photographical lens system is Fno, and its relational expression is: Fno=2.78.

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

In the 4th embodiment Photographical lens system, the abbe number of this first lens 710 is V1, and the abbe number of these the 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 the 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 the second lens 720 on optical axis is CT2, and the focal length of overall 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 this first lens 710 is R1, and the focal length of overall 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 overall 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, is R6 as side surface radius-of-curvature, and its relational expression is: R5/R6=1.07.

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

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

" the 5th embodiment "

Fifth embodiment of the invention refers to Fig. 9, and the aberration curve of the 5th embodiment refers to Figure 10.The Photographical lens system of the 5th embodiment is mainly made up of three pieces of lens, is extremely sequentially comprised as side by thing side:

The first lens 910 of the positive refracting power of one tool, its thing side surface 911 is convex surface, is concave surface as side surface 912, its material is plastic cement, the thing side surface 911 of this first lens 910, is all aspheric surface as side surface 912;

The second lens 920 of the negative refracting power of one tool, its thing side surface 921 be concave surface, is convex surface as side surface 922, its material is plastic cement, the thing side surface 921 of these the 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 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 being all provided with at least one point of inflexion on side surface 932;

One aperture 900 is placed between this first lens 910 and this second lens 920;

Separately include an infrared ray filtering optical filter 940 and cover glass 950 and be sequentially placed in looking like between side surface 932 and an imaging surface 960 of the 3rd lens 930; The material of this infrared ray filtering optical filter 940 and cover glass 950 is the focal length that glass and its do not affect this Photographical lens system of the present invention.

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

In the 5th embodiment Photographical lens system, the focal length of overall 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 overall Photographical lens system is Fno, and its relational expression is: Fno=2.85.

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

In the 5th embodiment Photographical lens system, the abbe number of this first lens 910 is V1, and the abbe number of these the 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 the 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 the second lens 920 on optical axis is CT2, and the focal length of overall 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 this first lens 910 is R1, and the focal length of overall 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 overall 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, is R6 as side surface radius-of-curvature, and its relational expression is: R5/R6=0.56.

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

The detailed optical data of the 5th embodiment is as shown in Figure 25 table nine, and its aspherical surface data is as 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 the half at maximum visual angle.

" the 6th embodiment "

Sixth embodiment of the invention refers to Figure 11, and the aberration curve of the 6th embodiment refers to Figure 12.The Photographical lens system of the 6th embodiment is mainly made up of three pieces of lens, is extremely sequentially comprised as side by thing side:

The first lens 1110 of the positive refracting power of one tool, its thing side surface 1111 is convex surface, is concave surface as side surface 1112, its material is plastic cement, the thing side surface 1111 of this first lens 1110, is all aspheric surface as side surface 1112;

The second lens 1120 of the negative refracting power of one tool, its thing side surface 1121 be concave surface, is convex surface as side surface 1122, its material is plastic cement, the thing side surface 1121 of these the 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 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 being all provided with at least one point of inflexion on side surface 1132;

One aperture 1100 is placed between object and this first lens 1110;

Separately include an infrared ray filtering optical filter 1140 and be placed in looking like between side surface 1132 and an imaging surface 1150 of the 3rd lens 1130; The material of this infrared ray filtering optical filter 1140 is the focal length that glass and its do not affect this Photographical lens system of the present invention.

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

In the 6th embodiment Photographical lens system, the focal length of overall 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 overall Photographical lens system is Fno, and its relational expression is: Fno=2.78.

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

In the 6th embodiment Photographical lens system, the abbe number of this first lens 1110 is V1, and the abbe number of these the 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 the 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 the second lens 1120 on optical axis is CT2, and the focal length of overall 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 this first lens 1110 is R1, and the focal length of overall 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 overall 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, is R6 as side surface radius-of-curvature, and its relational expression is: R5/R6=1.90.

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

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

" the 7th embodiment "

Seventh embodiment of the invention refers to Figure 13, and the aberration curve of the 7th embodiment refers to Figure 14.The Photographical lens system of the 7th embodiment is mainly made up of three pieces of lens, is extremely sequentially comprised as side by thing side:

The first lens 1310 of the positive refracting power of one tool, its thing side surface 1311 is convex surface, is concave surface as side surface 1312, its material is plastic cement, the thing side surface 1311 of this first lens 1310, is all aspheric surface as side surface 1312;

The second lens 1320 of the negative refracting power of one tool, its thing side surface 1321 be concave surface, is convex surface as side surface 1322, its material is plastic cement, the thing side surface 1321 of these the 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 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 being all provided with at least one point of inflexion on side surface 1332;

One aperture 1300 is placed between object and this first lens 1310;

Separately include an infrared ray filtering optical filter 1340 and be placed in looking like between side surface 1332 and an imaging surface 1350 of the 3rd lens 1330; The material of this infrared ray filtering optical filter 1340 is the focal length that glass and its do not affect this Photographical lens system of the present invention.

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

In the 7th embodiment Photographical lens system, the focal length of overall 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 overall Photographical lens system is Fno, and its relational expression is: Fno=2.85.

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

In the 7th embodiment Photographical lens system, the abbe number of this first lens 1310 is V1, and the abbe number of these the 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 the 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 the second lens 1320 on optical axis is CT2, and the focal length of overall 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 this first lens 1310 is R1, and the focal length of overall 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 overall 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, is R6 as side surface radius-of-curvature, and its relational expression is: R5/R6=0.70.

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

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

" the 8th embodiment "

Eighth embodiment of the invention refers to Figure 15, and the aberration curve of the 8th embodiment refers to Figure 26.The Photographical lens system of the 8th embodiment is mainly made up of three pieces of lens, is extremely sequentially comprised as side by thing side:

The first lens 1510 of the positive refracting power of one tool, its thing side surface 1511, is all convex surface as side surface 1512, and its material is plastic cement, the thing side surface 1511 of this first lens 1510, is all aspheric surface as side surface 1512;

The second lens 1520 of the negative refracting power of one tool, its thing side surface 1521 be concave surface, is convex surface as side surface 1522, its material is plastic cement, the thing side surface 1521 of these the 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 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 being all provided with at least one point of inflexion on side surface 1532;

One aperture 1500 is placed between object and this first lens 1510;

Separately include an infrared ray filtering optical filter 1540 and be placed in looking like between side surface 1532 and an imaging surface 1550 of the 3rd lens 1530; The material of this infrared ray filtering optical filter 1540 is the focal length that glass and its do not affect this Photographical lens system of the present invention.

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

In the 8th embodiment Photographical lens system, the focal length of overall 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 overall Photographical lens system is Fno, and its relational expression is: Fno=2.45.

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

In the 8th embodiment Photographical lens system, the abbe number of this first lens 1510 is V1, and the abbe number of these the 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 the 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 the second lens 1520 on optical axis is CT2, and the focal length of overall 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 this first lens 1510 is R1, and the focal length of overall 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 overall 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, is R6 as side surface radius-of-curvature, and its relational expression is: R5/R6=1.50.

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

The detailed optical data of the 8th embodiment is as shown in Figure 31 table ten five, and its aspherical surface data is as shown in the table ten of Figure 32 six, and wherein the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half at 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); so all true gained of testing of numerical value change of each embodiment of the present invention; even if use different numerical value; the product of same structure must belong to protection category of the present invention; therefore 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

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

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

The second lens of the negative refracting power of one tool, its thing side surface and be all aspheric surface as side surface, the thing side surface of described the second lens is concave surface, is that convex surface and its material are plastic cement as side surface;

The 3rd lens of the negative refracting power of one tool, its thing side surface is convex surface, is 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 and material is plastic cement as at least one surface in side surface; And

One aperture, is arranged between object and described first lens;

Wherein, in described Photographical lens system, the number of lenses of tool refracting power is only three, the focal length of entirety Photographical lens system is f, the focal length of described first lens is f1, and the focal length of described the 3rd lens is f3, and described the second lens and the distance of described the 3rd lens on optical axis are T23, the abbe number of described first lens is V1, the abbe number of described the second lens is V2, and the thickness of described the second lens on optical axis is CT2, meets following relationship:

1.33<f/f1<1.70；

0<|f/f3|<0.25；

30.5<V1-V2<46.0；

2.0<(CT2/f)*100<12.0；

0.10mm<CT2<0.38mm；

13.0<(T23/f)*100<20.0。

2. Photographical lens system as claimed in claim 1, is characterized in that, the focal length of described the second lens is f2, and the thing side surface radius-of-curvature of described the 3rd lens is R5, described the 3rd lens be R6 as side surface radius-of-curvature, meet following relationship:

-0.65<f/f2<-0.25；

0.5<R5/R6<2.0。

3. Photographical lens system as claimed in claim 1, is characterized in that, meets following relationship:

2.0<(CT2/f)*100<9.0；

0.10mm<CT2<0.29mm。

4. Photographical lens system as claimed in claim 1, it is characterized in that, described Photographical lens system separately arranges a sense electronics optical element for object imaging thereon, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, and the half of described sense electronics optical element effective pixel area diagonal line length is ImgH, meet following relationship:

TTL/ImgH<1.85。