CN102221739A - Shooting optical system - Google Patents

Abstract

The invention provides a shooting optical system. From an object side to an image side, the system sequentially comprises: a first lens with a positive refraction power, wherein the object side surface is a convex side; a second lens with a negative refraction power, wherein the object side surface is the convex side, the image side surface is a concave side and at least one surface of the object side surface and the image side surface is aspheric; a third lens, wherein the object side surface and the image side surface are aspheric and at least one surface of the object side surface and the image side surface is provided with a point of inflection. The shooting optical system is provided with an aperture and an electronic photosensitive component which are used to help an object imaging. The aperture is arranged between the object and the first lens. And the shooting optical system is provided with three lenses with the refraction power.

Description

Image pickup optical system

Technical field

The invention relates to a kind of image pickup optical system; Particularly about a kind of miniaturization image pickup optical system that is applied on the portable type electronic product.

Background technology

Recent years, rise along with portable type electronic product with camera function, 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 (ComplementaryMetal-Oxide Semiconductor Sensor, CMOS Sensor) two kind, and along with progressing greatly of semiconductor fabrication, 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.

Existing miniaturization phtographic lens, for reducing manufacturing cost, adopt based on the two-piece type lens arrangement more, as United States Patent (USP) the 7th, the phtographic lens of a kind of two-chip type lens arrangement that discloses for 525, No. 741, 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 image pickup optical system that possesses three lens is feasible scheme.United States Patent (USP) the 7th, 564 has disclosed a kind of phtographic lens of three-chip type lens arrangement No. 635, yet its three lens are all positive refracting power lens, makes the correction difficulty comparatively of aberration in the system, and influences image quality.

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

Summary of the invention

The invention provides a kind of image pickup optical 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 convex surface, be concave surface as side surface, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And one the 3rd lens, its thing side surface and be all aspheric surface as side surface, and the thing side surface of the 3rd lens be provided with at least one point of inflexion as at least one surface in the side surface; Wherein, this image pickup optical system is provided with an aperture in addition and a sense electronics optical element supplies the object imaging, and this aperture is arranged between an object and this first lens, and the lens of tool refracting power are three in this image pickup optical system; The thing side table of these first lens and radius-of-curvature is R1, the thing side surface radius-of-curvature of these second lens is R3, the focal length of whole image pickup optical system is f, the abbe number of these first lens is V1, the abbe number of these second lens is V2, this aperture is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, satisfies following relationship formula: 0.20＜R1/f＜1.00; 0.30＜R3/f＜1.20; 30.5＜V1-V2＜40.0; 0.90＜SL/TTL＜1.20.

On the other hand, the invention provides a kind of image pickup optical 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 are convex surface, be concave surface as side surface, and the thing side surface of these first lens and be all aspheric surface as side surface; Second lens of the negative refracting power of one tool, its thing side surface are convex surface, be concave surface as side surface, and the thing side surface of these second lens and be all aspheric surface as side surface; And one the 3rd lens, its thing side surface is convex surface, be 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 be provided with at least one point of inflexion as at least one surface in the side surface; Wherein, this image pickup optical system is provided with an aperture in addition and a sense electronics optical element supplies the object imaging, and this aperture is arranged between an object and this second lens, and the lens of tool refracting power are three in this image pickup optical system; The thing side surface radius-of-curvature of these first lens is R1, these first lens be R2 as the side surface radius-of-curvature, the thing side surface radius-of-curvature of these second lens is R3, the focal length of whole image pickup optical system is f, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, satisfies following relationship formula: 0.10＜R1/R2＜0.50; 0.30＜R3/f＜4.50; 0.70＜SL/TTL＜1.20.

Again on the other hand, the invention provides a kind of image pickup optical 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 convex surface, be concave surface as side surface, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And the 3rd lens of the negative refracting power of a tool, the thing side surface of the 3rd lens be aspheric surface as at least one surface in the side surface; Wherein, the lens of tool refracting power are three in this image pickup optical system.

The present invention can effectively shorten the camera lens total length, reduce system sensitivity, and can obtain good image quality by above-mentioned mirror configuration set mode.

In the image pickup optical system of the present invention, the positive refracting power of this first lens tool provides system main refracting power, helps to shorten the total length of this image pickup optical system; This second lens tool is born refracting power, and the aberration that can be effectively first lens of the positive refracting power of tool be produced is done revisal, can help revising simultaneously the aberration of system; The 3rd lens can be positive refracting power or negative refracting power lens, and it acts on as the revisal lens, but balance and every aberration that update the system produced; When the positive refracting power of the 3rd lens tool, the refracting power that can effectively distribute 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 is away from imaging surface, help shortening the optics total length of system, to keep the miniaturization of camera lens.

In the image pickup optical 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 total length of this image pickup optical 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, help the image quality of elevator system.The thing side surface of these second lens is convex surface, be concave surface as side surface, can help revising the aberration that these first lens are produced, and can effectively control the refracting power of these second lens, and then reduce the susceptibility of 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.

In the image pickup optical system of the present invention, this aperture can place between an object and this first lens or between these first lens and this second lens.Provide positive refracting power by these first lens, and when aperture placed object side near this image pickup optical system, can effectively shorten the optics total length of this image pickup optical system.In addition, above-mentioned configuration can make the outgoing pupil (Exit Pupil) of this image pickup optical 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 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, can be provided with the point of inflexion by the 3rd lens, 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.On the other hand, 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 so dispose the susceptibility that helps reduce this image pickup optical system distorting (Distortion) and multiplying power look.In other words, in the image pickup optical system of the present invention, when aperture being placed more near the object place, focus on heart characteristic far away, the total length of whole image pickup optical 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 image pickup optical system.

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 a table one, is the optical data of first embodiment of the invention.

Figure 12 is a table two, is the aspherical surface data of first embodiment of the invention.

Figure 13 is a table three, is the optical data of second embodiment of the invention.

Figure 14 is a table four, is the aspherical surface data of second embodiment of the invention.

Figure 15 is a table five, is the optical data of third embodiment of the invention.

Figure 16 is a table six, is the aspherical surface data of third embodiment of the invention.

Figure 17 is a table seven, is the optical data of fourth embodiment of the invention.

Figure 18 is a table eight, is the aspherical surface data of fourth embodiment of the invention.

Figure 19 is a table nine, is the optical data of fifth embodiment of the invention.

Figure 20 A and Figure 20 B are respectively table ten A and table ten B, are the aspherical surface data of fifth embodiment of the invention.

Figure 21 is a table ten one, is the numerical data of first embodiment of the invention to the five embodiment correlationship formulas.

Drawing reference numeral:

Aperture 100,300,500,700,900

First lens 110,310,510,710,910

Thing side surface 111,311,511,711,911

Picture side surface 112,312,512,712,912

Second lens 120,320,520,720,920

Thing side surface 121,321,521,721,921

Picture side surface 122,322,522,722,922

The 3rd lens 130,330,530,730,930

Thing side surface 131,331,531,731,931

Picture side surface 132,332,532,732,932

Infrared ray filtering optical filter 140,340,540,740,940

Imaging surface 150,350,550,750,950

The focal length of whole image pickup optical 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 second lens is R3

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

The thickness of second lens on optical axis is CT2

Maximum ga(u)ge in all individual lenses in the image pickup optical system on optical axis is CTmax

Minimum thickness in all individual lenses in the image pickup optical system on optical axis is CTmin

Aperture to the distance of sense electronics optical element on optical axis is SL

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 image pickup optical 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 convex surface, be concave surface as side surface, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And one the 3rd lens, its thing side surface and be all aspheric surface as side surface, and the thing side surface of the 3rd lens be provided with at least one point of inflexion as at least one surface in the side surface; Wherein, this image pickup optical system is provided with an aperture in addition and a sense electronics optical element supplies the object imaging, and this aperture is arranged between an object and this first lens, and the lens of tool refracting power are three in this image pickup optical system; The thing side surface radius-of-curvature of these first lens is R1, the thing side surface radius-of-curvature of these second lens is R3, the focal length of whole image pickup optical system is f, the abbe number of these first lens is V1, the abbe number of these second lens is V2, this aperture is SL to the distance of this sense electronics optical element on optical axis, and the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, satisfies following relationship formula: 0.20＜R1/f＜1.00; 0.30＜R3/f＜1.20; 30.5＜V1-V2＜40.0; 0.90＜SL/TTL＜1.20.

When aforementioned image pickup optical system satisfies following relationship formula: 0.20＜R1/f＜1.00, can effectively reduce the total length of this image pickup optical system, and can avoid the excessive increase of higher order aberratons; Preferably, satisfy following relationship formula 0.30＜R1/f＜0.45.When aforementioned image pickup optical system satisfies following relationship formula: 0.30＜R3/f＜1.20, can help regulating and control the suitable negative refracting power of this second lens tool, and can effectively revise the aberration of this image pickup optical system; Preferably, satisfy following relationship formula: 0.40＜R3/f＜0.70.When aforementioned image pickup optical system satisfies following relationship formula: 30.5＜V1-V2＜40.0, can help the correction of aberration in this image pickup optical system.When aforementioned image pickup optical system satisfies following relationship formula: 0.90＜SL/TTL＜1.20, can help this image pickup optical system and in heart characteristic far away and Wide-angle, obtain good balance.

In the aforementioned image pickup optical 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, with the image quality of elevator system; Preferably, the 3rd lens be concave surface as side surface, 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 the aforementioned image pickup optical system of the present invention, preferably, the material of the 3rd lens is a plastic cement, and the plastic cement material lens not only help the making of non-spherical lens, more can effectively reduce production costs.

In the aforementioned image pickup optical system of the present invention, the focal length of whole image pickup optical system is f, and the focal length of these first lens is f1, preferably, satisfies following relationship formula: 0.75＜f/f1＜1.20.When f/f1 satisfies the above-mentioned relation formula, can make the refracting power of these first lens dispose comparatively balance, the effective total length of control system, keep the characteristic of miniaturization, and can avoid the excessive increase of high-order spherical aberration (High Order SphericalAberration) simultaneously, and then promote image quality; Further, preferablely satisfy following relationship formula: 0.85＜f/f1＜1.05.

In the aforementioned image pickup optical system of the present invention, the focal length of whole image pickup optical system is f, and the focal length of these second lens is f2, preferably, satisfies following relationship formula :-0.45＜f/f2＜-0.15.When f/f2 satisfies the above-mentioned relation formula, the 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 image pickup optical system.

In the aforementioned image pickup optical system of the present invention, the thickness of these second lens on optical axis is CT2, and the focal length of whole image pickup optical system is f, preferably, satisfies following relationship formula: 0.04＜CT2/f＜0.12.When CT2/f satisfied the above-mentioned relation formula, the thickness of these second lens was comparatively suitable, can obtain good balance considering between eyeglass technology yield and the update the system aberration.

In the aforementioned image pickup optical system of the present invention, the focal length of whole image pickup optical system is f, and the focal length of the 3rd lens is f3, preferably, satisfies the following relationship formula: 0.06＜| f/f3|＜0.35.When | when f/f3| satisfied the above-mentioned relation formula, the effect that can make the 3rd lens was as the revisal lens, and 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 image pickup optical system.

In the aforementioned image pickup optical 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: 0.70＜R5/R6＜2.00.When R5/R6 satisfies the above-mentioned relation formula, can help the higher order aberratons of update the system, promote image quality.

In the aforementioned image pickup optical system of the present invention, 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, satisfies following relationship formula: TTL/ImgH＜1.9.When TTL/ImgH satisfies the above-mentioned relation formula, help keeping the miniaturization of this image pickup optical system, to be equipped on the frivolous portable electronic product.

On the other hand, the invention provides a kind of image pickup optical 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 are convex surface, be concave surface as side surface, and the thing side surface of these first lens and be all aspheric surface as side surface; Second lens of the negative refracting power of one tool, its thing side surface are convex surface, be concave surface as side surface, and the thing side surface of these second lens and be all aspheric surface as side surface; And one the 3rd lens, its thing side surface is convex surface, be 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 be provided with at least one point of inflexion as at least one surface in the side surface; Wherein, this image pickup optical system is provided with an aperture in addition and a sense electronics optical element supplies the object imaging, and this aperture is arranged between an object and this second lens, and the lens of tool refracting power are three in this image pickup optical system; The thing side surface radius-of-curvature of these first lens is R1, these first lens be R2 as the side surface radius-of-curvature, the thing side surface radius-of-curvature of these second lens is R3, the focal length of whole image pickup optical system is f, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, satisfies following relationship formula: 0.10＜R1/R2＜0.50; 0.30＜R3/f＜4.50; 0.70＜SL/TTL＜1.20.

When aforementioned image pickup optical system satisfies following relationship formula: 0.10＜R1/R2＜0.50, can help the revisal of system's spherical aberration (Spherical Aberration).When aforementioned image pickup optical system satisfies following relationship formula: 0.30＜R3/f＜4.50, can help regulating and control the suitable negative refracting power of this second lens tool, and can effectively revise the aberration of this image pickup optical system; Preferably, satisfy following relationship formula: 0.30＜R3/f＜1.20; Further, preferablely satisfy following relationship formula: 0.40＜R3/f＜0.70.When aforementioned image pickup optical system satisfies following relationship formula: 0.70＜SL/TTL＜1.20, can help this image pickup optical system and in heart characteristic far away and Wide-angle, obtain good balance; Preferably, this aperture is arranged between an object and this first lens and satisfies following relationship formula: 0.90＜SL/TTL＜1.20.

In the aforementioned image pickup optical system of the present invention, preferably, the material of these first lens is a plastic cement, and the plastic cement material lens not only help the making of non-spherical lens, more can effectively reduce production costs.

In the aforementioned image pickup optical system of the present invention, the abbe number of these first lens is V1, and the abbe number of these second lens is V2, preferably, satisfies following relationship formula: 30.5＜V1-V2＜40.0.When V1-V2 satisfies the above-mentioned relation formula, can help the correction of aberration in this image pickup optical system.

In the aforementioned image pickup optical system of the present invention, the focal length of whole image pickup optical system is f, and the focal length of these first lens is f1, preferably, satisfies following relationship formula: 0.75＜f/f1＜1.20.When f/f1 satisfies the above-mentioned relation formula, can make the refracting power of these first lens dispose comparatively balance, effectively the 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.

In the aforementioned image pickup optical system of the present invention, the thickness of these second lens on optical axis is CT2, and the focal length of whole image pickup optical system is f, preferably, satisfies following relationship formula: 0.04＜CT2/f＜0.12.When CT2/f satisfied the above-mentioned relation formula, the thickness of these second lens was comparatively suitable, can obtain good balance considering between eyeglass technology yield and the update the system aberration.

In the aforementioned image pickup optical system of the present invention, the thing side surface radius-of-curvature of these first lens is R1, and the focal length of whole image pickup optical system is f, preferably, satisfies following relationship formula: 0.30＜R1/f＜0.45.When R1/f satisfies the above-mentioned relation formula, can effectively reduce the total length of this image pickup optical system, and can avoid the excessive increase of higher order aberratons.

In the aforementioned image pickup optical system of the present invention, the focal length of whole image pickup optical system is f, and the focal length of the 3rd lens is f3, preferably, satisfies the following relationship formula: 0.06＜| f/f3|＜0.35.When | when f/f3| satisfied the above-mentioned relation formula, the effect that can make the 3rd lens was as the revisal lens, and 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 image pickup optical system.

Again on the other hand, the invention provides a kind of image pickup optical 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 convex surface, be concave surface as side surface, and the thing side surface of these second lens be aspheric surface as at least one surface in the side surface; And the 3rd lens of the negative refracting power of a tool, the thing side surface of the 3rd lens be aspheric surface as at least one surface in the side surface; Wherein, the lens of tool refracting power are three in this image pickup optical system.

In the aforementioned image pickup optical system of the present invention, preferably, the thing side surface of the 3rd lens be provided with at least one point of inflexion as at least one surface in the side surface, help suppressing light and be incident in angle on the photo-sensitive cell, and the further aberration of modified off-axis visual field from the axle visual field.

In the aforementioned image pickup optical system of the present invention, maximum ga(u)ge in all individual lenses of this image pickup optical system on optical axis is CTmax, and the minimum thickness in all individual lenses of this image pickup optical system on optical axis is CTmin, preferably, satisfy following relationship formula: 3.0＜CTmax/CTmin＜4.8.When CTmax/CTmin satisfies the above-mentioned relation formula, can make the configuration of lens thickness in this image pickup optical system comparatively suitable, not only help mouldability and the homogenieity of eyeglass when plastic rubber ejaculate molding, and can make this image pickup optical system that good image quality is arranged.

In the aforementioned image pickup optical system of the present invention, the focal length of whole image pickup optical system is f, and the focal length of these first lens is f1, preferably, satisfies following relationship formula: 0.85＜f/f1＜1.05.When f/f1 satisfies the above-mentioned relation formula, can make the refracting power of these first lens dispose comparatively balance, effectively the 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.

In the aforementioned image pickup optical system of the present invention, other is provided with an aperture and a sense electronics optical element supplies the object imaging, this aperture is arranged between an object and this first lens, this aperture to the distance of this sense electronics optical element on optical axis is SL, the thing side surface of these first lens to the distance of this sense electronics optical element on optical axis is TTL, preferably, satisfy following relationship formula: 0.90＜SL/TTL＜1.20.When SL/TTL satisfies the above-mentioned relation formula, can help this image pickup optical system and in heart characteristic far away and Wide-angle, obtain good balance.

In the aforementioned image pickup optical system of the present invention, the focal length of whole image pickup optical system is f, and the focal length of the 3rd lens is f3, preferably, satisfies the following relationship formula: 0.06＜| f/f3|＜0.35.When | when f/f3| satisfied the above-mentioned relation formula, the effect that can make the 3rd lens was as the revisal lens, and 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 image pickup optical system.

In the aforementioned image pickup optical system of the present invention, the thing side surface radius-of-curvature of these second lens is R3, and the focal length of whole image pickup optical system is f, preferably, satisfies following relationship formula: 0.30＜R3/f＜1.20.When R3/f satisfies the above-mentioned relation formula, can help regulating and control the suitable negative refracting power of this second lens tool, and can effectively revise the aberration of this image pickup optical system.

In the aforementioned image pickup optical system of the present invention, the thing side surface radius-of-curvature of these first lens is R1, and the focal length of whole image pickup optical system is f, preferably, satisfies following relationship formula: 0.30＜R1/f＜0.45.When R1/f satisfies the above-mentioned relation formula, can effectively reduce the total length of this image pickup optical system, and can avoid the excessive increase of higher order aberratons.

In the aforementioned image pickup optical system of the present invention, the thickness of these second lens on optical axis is CT2, and the focal length of whole image pickup optical system is f, preferably, satisfies following relationship formula: 0.04＜CT2/f＜0.12.When CT2/f satisfied the above-mentioned relation formula, the thickness of these second lens was comparatively suitable, can obtain good balance considering between eyeglass technology yield and the update the system aberration.

In the image pickup optical 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 total length of image pickup optical system of the present invention.

In the image pickup optical 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.

Image pickup optical 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 image pickup optical 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 convex surface, be concave 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 positive 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;

Wherein, this image pickup optical system is provided with an aperture 100 in addition and 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 image pickup optical system of the present invention.

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

$X\left(Y\right)=({\mathrm{<figure-callout\; id="2"\; label="Y"\; filenames="HSA00000088254400111.png,HSA00000088254400112.png"\; state="\{\{state\}\}">Y</figure-callout>}}^2/R)/(1+\mathrm{sqrt}(1-(1+k)*{(Y/R)}^2))+\underset{i}{\mathrm{\&Sigma;}}\left(\mathrm{Ai}\right)*\left(Y^i\right)$

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 image pickup optical system, the focal length of whole image pickup optical system is f, and its relational expression is: f=3.36 (millimeter).

In the first embodiment image pickup optical system, the f-number of whole image pickup optical system (f-number) is Fno, and its relational expression is: Fno=2.78.

In the first embodiment image pickup optical system, half of maximum visual angle is HFOV in the whole image pickup optical system, and its relational expression is: HFOV=33.6 (degree).

In the first embodiment image pickup optical 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 image pickup optical system, the thickness of these second lens 120 on optical axis is CT2, and the focal length of whole image pickup optical system is f, and its relational expression is: CT2/f=0.09.

In the first embodiment image pickup optical system, the maximum ga(u)ge in all individual lenses on optical axis is CTmax, and the minimum thickness on optical axis is CTmin in all individual lenses, and its relational expression is: CTmax/CTmin=3.63.

In the first embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 110 is R1, and the focal length of whole image pickup optical system is f, and its relational expression is: R1/f=0.41.

In the first embodiment image pickup optical system, the thing side surface radius-of-curvature of these second lens 120 is R3, and the focal length of whole image pickup optical system is f, and its relational expression is: R3/f=0.58.

In the first embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 110 is R1, be R2 as the side surface radius-of-curvature, its relational expression is: R1/R2=0.39.

In the first embodiment image pickup optical 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=0.89.

In the first embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these first lens 110 is f1, and its relational expression is: f/f1=0.88.

In the first embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these second lens 120 is f2, and its relational expression is: f/f2=-0.29.

In the first embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of the 3rd lens 130 is f3, and its relational expression is: | f/f3|=0.28.

In the first embodiment image pickup optical system, this image pickup optical system is provided with a sense electronics optical element in these imaging surface 150 places for the object imaging thereon in addition, this aperture 100 to the distance of this sense electronics optical element on optical axis is SL, the thing side surface 111 of these first lens 110 is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=1.01.

In the first embodiment image pickup optical system, 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=1.72.

The detailed optical data of first embodiment is shown in Figure 11 table one, and its aspherical surface data is shown in Figure 12 table two, 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 image pickup optical 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 convex surface, be concave 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 positive refracting power of one tool, its thing side surface 331 is convex surface, is 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;

Wherein, this image pickup optical system is provided with an aperture 300 in addition and 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 image pickup optical 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 image pickup optical system, the focal length of whole image pickup optical system is f, and its relational expression is: f=3.37 (millimeter).

In the second embodiment image pickup optical system, the f-number of whole image pickup optical system is Fno, and its relational expression is: Fno=2.45.

In the second embodiment image pickup optical system, half of maximum visual angle is HFOV in the whole image pickup optical system, and its relational expression is: HFOV=33.5 (degree).

In the second embodiment image pickup optical 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 image pickup optical system, the thickness of these second lens 320 on optical axis is CT2, and the focal length of whole image pickup optical system is f, and its relational expression is: CT2/f=0.09.

In the second embodiment image pickup optical system, the maximum ga(u)ge in all individual lenses on optical axis is CTmax, and the minimum thickness on optical axis is CTmin in all individual lenses, and its relational expression is: CTmax/CTmin=3.71.

In the second embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 310 is R1, and the focal length of whole image pickup optical system is f, and its relational expression is: R1/f=0.41.

In the second embodiment image pickup optical system, the thing side surface radius-of-curvature of these second lens 320 is R3, and the focal length of whole image pickup optical system is f, and its relational expression is: R3/f=0.58.

In the second embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 310 is R1, be R2 as the side surface radius-of-curvature, its relational expression is: R1/R2=0.35.

In the second embodiment image pickup optical 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=0.92.

In the second embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these first lens 310 is f1, and its relational expression is: f/f1=0.92.

In the second embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these second lens 320 is f2, and its relational expression is: f/f2=-0.32.

In the second embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of the 3rd lens 330 is f3, and its relational expression is: | f/f3|=0.21.

In the second embodiment image pickup optical system, this image pickup optical system is provided with a sense electronics optical element in these imaging surface 350 places for the object imaging thereon in addition, this aperture 300 to the distance of this sense electronics optical element on optical axis is SL, the thing side surface 311 of these first lens 310 is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.96.

In the second embodiment image pickup optical system, 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=1.72.

The detailed optical data of second embodiment is shown in Figure 13 table three, and its aspherical surface data is shown in Figure 14 table four, 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 image pickup optical 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 convex surface, be concave 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;

Wherein, this image pickup optical system is provided with an aperture 500 in addition and places between object and this first lens 510;

Other includes an infrared ray filtering optical filter 540 and places looking like between a side surface 532 and the imaging surface 550 of the 3rd lens 530; The material of this infrared ray filtering optical filter 540 is that glass and its do not influence the focal length of this image pickup optical 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 image pickup optical system, the focal length of whole image pickup optical system is f, and its relational expression is: f=3.48 (millimeter).

In the 3rd embodiment image pickup optical system, the f-number of whole image pickup optical system is Fno, and its relational expression is: Fno=2.80.

In the 3rd embodiment image pickup optical system, half of maximum visual angle is HFOV in the whole image pickup optical system, and its relational expression is: HFOV=32.8 (degree).

In the 3rd embodiment image pickup optical 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 image pickup optical system, the thickness of these second lens 520 on optical axis is CT2, and the focal length of whole image pickup optical system is f, and its relational expression is: CT2/f=0.08.

In the 3rd embodiment image pickup optical system, the maximum ga(u)ge in all individual lenses on optical axis is CTmax, and the minimum thickness on optical axis is CTmin in all individual lenses, and its relational expression is: CTmax/CTmin=4.46.

In the 3rd embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 510 is R1, and the focal length of whole image pickup optical system is f, and its relational expression is: R1/f=0.39.

In the 3rd embodiment image pickup optical system, the thing side surface radius-of-curvature of these second lens 520 is R3, and the focal length of whole image pickup optical system is f, and its relational expression is: R3/f=0.60.

In the 3rd embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 510 is R1, be R2 as the side surface radius-of-curvature, its relational expression is: R1/R2=0.33.

In the 3rd embodiment image pickup optical 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=1.36.

In the 3rd embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these first lens 510 is f1, and its relational expression is: f/f1=1.01.

In the 3rd embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these second lens 520 is f2, and its relational expression is: f/f2=-0.23.

In the 3rd embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of the 3rd lens 530 is f3, and its relational expression is: | f/f3|=0.10.

In the 3rd embodiment image pickup optical system, this image pickup optical system is provided with a sense electronics optical element in these imaging surface 550 places for the object imaging thereon in addition, this aperture 500 to the distance of this sense electronics optical element on optical axis is SL, the thing side surface 511 of these first lens 510 is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=1.00.

In the 3rd embodiment image pickup optical system, 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=1.72.

The detailed optical data of the 3rd embodiment is shown in Figure 15 table five, and its aspherical surface data is shown in Figure 16 table six, 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 image pickup optical 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 convex surface, be concave 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 negative 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;

Wherein, this image pickup optical system is provided with an aperture 700 in addition and 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 image pickup optical 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 image pickup optical system, the focal length of whole image pickup optical system is f, and its relational expression is: f=3.76 (millimeter).

In the 4th embodiment image pickup optical system, the f-number of whole image pickup optical system is Fno, and its relational expression is: Fno=2.80.

In the 4th embodiment image pickup optical system, half of maximum visual angle is HFOV in the whole image pickup optical system, and its relational expression is: HFOV=30.7 (degree).

In the 4th embodiment image pickup optical 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 image pickup optical system, the thickness of these second lens 720 on optical axis is CT2, and the focal length of whole image pickup optical system is f, and its relational expression is: CT2/f=0.07.

In the 4th embodiment image pickup optical system, the maximum ga(u)ge in all individual lenses on optical axis is CTmax, and the minimum thickness on optical axis is CTmin in all individual lenses, and its relational expression is: CTmax/CTmin=3.93.

In the 4th embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 710 is R1, and the focal length of whole image pickup optical system is f, and its relational expression is: R1/f=0.40.

In the 4th embodiment image pickup optical system, the thing side surface radius-of-curvature of these second lens 720 is R3, and the focal length of whole image pickup optical system is f, and its relational expression is: R3/f=0.53.

In the 4th embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 710 is R1, be R2 as the side surface radius-of-curvature, its relational expression is: R1/R2=0.34.

In the 4th embodiment image pickup optical 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=1.64.

In the 4th embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these first lens 710 is f1, and its relational expression is: f/f1=0.98.

In the 4th embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these second lens 720 is f2, and its relational expression is: f/f2=-0.10.

In the 4th embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of the 3rd lens 730 is f3, and its relational expression is: | f/f3|=0.25.

In the 4th embodiment image pickup optical system, this image pickup optical system is provided with a sense electronics optical element in these imaging surface 750 places for the object imaging thereon in addition, this aperture 700 to the distance of this sense electronics optical element on optical axis is SL, the thing side surface 711 of these first lens 710 is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=1.00.

In the 4th embodiment image pickup optical system, 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=1.83.

The detailed optical data of the 4th embodiment is shown in Figure 17 table seven, and its aspherical surface data is shown in Figure 18 table eight, 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 image pickup optical 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 convex surface, be concave 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;

Wherein, this image pickup optical system is provided with an aperture 900 in addition and places between these first lens 910 and this second lens 920;

Other includes an infrared ray filtering optical filter 940 and places looking like between a side surface 932 and the imaging surface 950 of the 3rd lens 930; The material of this infrared ray filtering optical filter 940 is that glass and its do not influence the focal length of this image pickup optical 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 image pickup optical system, the focal length of whole image pickup optical system is f, and its relational expression is: f=3.67 (millimeter).

In the 5th embodiment image pickup optical system, the f-number of whole image pickup optical system is Fno, and its relational expression is: Fno=2.80.

In the 5th embodiment image pickup optical system, half of maximum visual angle is HFOV in the whole image pickup optical system, and its relational expression is: HFOV=32.2 (degree).

In the 5th embodiment image pickup optical 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 image pickup optical system, the thickness of these second lens 920 on optical axis is CT2, and the focal length of whole image pickup optical system is f, and its relational expression is: CT2/f=0.13.

In the 5th embodiment image pickup optical system, the maximum ga(u)ge in all individual lenses on optical axis is CTmax, and the minimum thickness on optical axis is CTmin in all individual lenses, and its relational expression is: CTmax/CTmin=3.21.

In the 5th embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 910 is R1, and the focal length of whole image pickup optical system is f, and its relational expression is: R1/f=0.38.

In the 5th embodiment image pickup optical system, the thing side surface radius-of-curvature of these second lens 920 is R3, and the focal length of whole image pickup optical system is f, and its relational expression is: R3/f=0.56.

In the 5th embodiment image pickup optical system, the thing side surface radius-of-curvature of these first lens 910 is R1, be R2 as the side surface radius-of-curvature, its relational expression is: R1/R2=0.46.

In the 5th embodiment image pickup optical 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=0.71.

In the 5th embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these first lens 910 is f1, and its relational expression is: f/f1=0.87.

In the 5th embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of these second lens 920 is f2, and its relational expression is: f/f2=-0.18.

In the 5th embodiment image pickup optical system, the focal length of whole image pickup optical system is f, and the focal length of the 3rd lens 930 is f3, and its relational expression is: | f/f3|=0.20.

In the 5th embodiment image pickup optical system, this image pickup optical system is provided with a sense electronics optical element in these imaging surface 950 places for the object imaging thereon in addition, this aperture 900 to the distance of this sense electronics optical element on optical axis is SL, the thing side surface 911 of these first lens 910 is TTL to the distance of this sense electronics optical element on optical axis, and its relational expression is: SL/TTL=0.86.

In the 5th embodiment image pickup optical system, 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=1.91.

The detailed optical data of the 5th embodiment is shown in Figure 19 table nine, and its aspherical surface data is shown in table ten A and table ten 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.

Table one is depicted as the different numerical value change tables of image pickup optical system embodiment of the present invention to table ten (corresponding Figure 11 to Figure 20 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 one (corresponding Figure 21) is the numerical data of the corresponding correlationship formula of the present invention of each embodiment.

Claims (26)

1. an image pickup optical system is characterized in that, is extremely comprised in regular turn as side 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 convex surface, be concave surface as side surface, and the thing side surface of described second lens be aspheric surface as at least one surface in the side surface; And

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

Wherein, described image pickup optical system is provided with an aperture in addition and a sense electronics optical element supplies the object imaging, and described aperture is arranged between an object and described first lens, and the lens of tool refracting power are three in the described image pickup optical system; The thing side surface radius-of-curvature of described first lens is R1, the thing side surface radius-of-curvature of described second lens is R3, the focal length of whole image pickup optical system is f, the abbe number of described first lens is V1, the abbe number of described second lens is V2, described aperture to the distance of described sense electronics optical element on optical axis is SL, and the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, satisfies the following relationship formula:

0.20＜R1/f＜1.00；

0.30＜R3/f＜1.20；

30.5＜V1-V2＜40.0；

0.90＜SL/TTL＜1.20。

2. image pickup optical system as claimed in claim 1 is characterized in that, described the 3rd lens be concave surface as side surface, and the material of described the 3rd lens is a plastic cement.

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

4. image pickup optical 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 image pickup optical system is f, satisfies the following relationship formula:

0.30＜R1/f＜0.45。

5. image pickup optical system as claimed in claim 2 is characterized in that, the focal length of whole image pickup optical system is f, and the focal length of described first lens is f1, satisfies the following relationship formula:

0.75＜f/f1＜1.20。

6. image pickup optical system as claimed in claim 5 is characterized in that, the focal length of whole image pickup optical system is f, and the focal length of described second lens is f2, satisfies the following relationship formula:

-0.45＜f/f2＜-0.15。

7. image pickup optical system as claimed in claim 6 is characterized in that, the focal length of whole image pickup optical system is f, and the focal length of described first lens is f1, satisfies the following relationship formula:

0.85＜f/f1＜1.05。

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

0.04＜CT2/f＜0.12。

9. image pickup optical system as claimed in claim 1 is characterized in that, the focal length of whole image pickup optical system is f, and the focal length of described the 3rd lens is f3, satisfies the following relationship formula:

0.06＜|f/f3|＜0.35。

10. image pickup optical system as claimed in claim 9 is characterized in that, the thing side surface radius-of-curvature of described the 3rd lens is R5, be R6 as the side surface radius-of-curvature, satisfies the following relationship formula:

0.70＜R5/R6＜2.00。

11. image pickup optical system as claimed in claim 1 is characterized in that, the thing side surface radius-of-curvature of described second lens is R3, and the focal length of whole image pickup optical system is f, satisfies the following relationship formula:

0.40＜R3/f＜0.70。

12. image pickup optical system as claimed in claim 1, it is characterized in that, 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＜1.9。

13. an image pickup optical system is characterized in that, is extremely comprised in regular turn as side by the thing side:

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

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

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 as side surface, and the thing side surface of described the 3rd lens be provided with at least one point of inflexion as at least one surface in the side surface;

Wherein, described image pickup optical system is provided with an aperture in addition and a sense electronics optical element supplies the object imaging, and described aperture is arranged between an object and described second lens, and the lens of tool refracting power are three in the described image pickup optical system; The thing side surface radius-of-curvature of described first lens is R1, described first lens be R2 as the side surface radius-of-curvature, the thing side surface radius-of-curvature of described second lens is R3, the focal length of whole image pickup optical system is f, described aperture to the distance of described sense electronics optical element on optical axis is SL, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, satisfies the following relationship formula:

0.10＜R1/R2＜0.50；

0.30＜R3/f＜4.50；

0.70＜SL/TTL＜1.20。

14. image pickup optical system as claimed in claim 13 is characterized in that, the material of described first lens is a plastic cement.

15. image pickup optical system as claimed in claim 14 is characterized in that, the abbe number of described first lens is V1, and the abbe number of described second lens is V2, satisfies the following relationship formula:

30.5＜V1-V2＜40.0。

16. image pickup optical system as claimed in claim 15 is characterized in that, the thing side surface radius-of-curvature of described second lens is R3, and the focal length of whole image pickup optical system is f, satisfies the following relationship formula:

0.40＜R3/f＜0.70。

17. image pickup optical system as claimed in claim 13 is characterized in that, the focal length of whole image pickup optical system is f, and the focal length of described first lens is f1, and the thing side surface radius-of-curvature of described second lens is R3, satisfies the following relationship formula:

0.75＜f/f1＜1.20；

0.30＜R3/f＜1.20。

18. image pickup optical system as claimed in claim 17, it is characterized in that, described aperture is arranged between an object and described first lens, described aperture to the distance of described sense electronics optical element on optical axis is SL, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, satisfies the following relationship formula:

0.90＜SL/TTL＜1.20。

19. image pickup optical system as claimed in claim 18 is characterized in that, the thickness of described second lens on optical axis is CT2, and the focal length of whole image pickup optical system is f, satisfies the following relationship formula:

0.04＜CT2/f＜0.12。

20. image pickup optical system as claimed in claim 13 is characterized in that, the thing side surface radius-of-curvature of described first lens is R1, and the focal length of whole image pickup optical system is f, satisfies the following relationship formula:

0.30＜R1/f＜0.45。

21. image pickup optical system as claimed in claim 20 is characterized in that, the focal length of whole image pickup optical system is f, and the focal length of described the 3rd lens is f3, satisfies the following relationship formula:

0.06＜|f/f3|＜0.35。

22. an image pickup optical system is characterized in that, is extremely comprised in regular turn as side 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 convex surface, be concave surface as side surface, and the thing side surface of described second lens be aspheric surface as at least one surface in the side surface; And

The 3rd lens of the negative refracting power of one tool, the thing side surface of described the 3rd lens be aspheric surface as at least one surface in the side surface;

Wherein, the lens of tool refracting power are three in the described image pickup optical system.

23. image pickup optical system as claimed in claim 22, it is characterized in that, the thing side surface of described the 3rd lens be provided with at least one point of inflexion as at least one surface in the side surface, maximum ga(u)ge in all individual lenses of described image pickup optical system on optical axis is CTmax, minimum thickness in all individual lenses of described image pickup optical system on optical axis is CTmin, satisfies the following relationship formula:

3.0＜CTmax/CTmin＜4.8。

24. image pickup optical system as claimed in claim 22, it is characterized in that, described image pickup optical system is provided with an aperture in addition and a sense electronics optical element supplies the object imaging, described aperture is arranged between an object and described first lens, described aperture to the distance of described sense electronics optical element on optical axis is SL, the thing side surface of described first lens to the distance of described sense electronics optical element on optical axis is TTL, the focal length of whole image pickup optical system is f, the focal length of described first lens is f1, satisfies the following relationship formula:

0.90＜SL/TTL＜1.20；

0.85＜f/f1＜1.05。

25. image pickup optical system as claimed in claim 22 is characterized in that, the focal length of described whole image pickup optical system is f, and the focal length of described the 3rd lens is f3, and the thing side surface radius-of-curvature of described second lens is R3, satisfies the following relationship formula:

0.06＜|f/f3|＜0.35；

0.30＜R3/f＜1.20。

26. image pickup optical system as claimed in claim 22 is characterized in that, the thing side surface radius-of-curvature of described first lens is R1, and the focal length of whole image pickup optical system is f, and the thickness of described second lens on optical axis is CT2, satisfies the following relationship formula:

0.30＜R1/f＜0.45；

0.04＜CT2/f＜0.12。

Images