CN102023370A - Imaging lens system - Google Patents
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- CN102023370A CN102023370A CN2009101721711A CN200910172171A CN102023370A CN 102023370 A CN102023370 A CN 102023370A CN 2009101721711 A CN2009101721711 A CN 2009101721711A CN 200910172171 A CN200910172171 A CN 200910172171A CN 102023370 A CN102023370 A CN 102023370A
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Abstract
The invention discloses an imaging lens system. The imaging lens system comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and an aperture sequentially from an object side to an image side, wherein the first lens is provided with a positive flexion force; the surface of the object side of the first lens is a convex surface; the second lens is provided with a negative flexion force; the third lens is provided with a positive flexion force; at least one surface of the object side and the image side of the third lens is an aspheric surface; the surface of the image side of the fourth lens is an aspheric surface; the surface of the image side of the fourth lens is provided with at least one inflexion point; the surface of the object side of the fifth lens is a concave surface; at least one surface of the object side and the image side of the fifth lens is an aspheric surface; and the aperture is arranged between a shot object and the second lens. According to the configuration mode, the total optical length of the imaging lens system can be effectively shortened, the sensitivity of an optical system can be reduced and the imaging property of the system can be improved.
Description
Technical field
The present invention relates to a kind of imaging len system, relate in particular to a kind of miniaturization imaging len system that is applied to mobile phone camera.
Background technology
Recent years, rise along with mobile phone camera, the demand of miniaturization phtographic lens day by day improves, and the photosensory assembly of general phtographic lens is nothing more than being photosensitive coupling component (Charge Coupled Device, CCD) or complementary metal oxide semiconductor (CMOS) (Complementary Metal-Oxide Semiconductor, CMOS) two kinds, and because semiconductor fabrication process development of technology, make the elemental area of photosensory assembly dwindle, the miniaturization phtographic lens is gradually toward the development of high pixel field, therefore, the requirement to image quality also increases day by day.
Tradition is equipped on the miniaturization phtographic lens of mobile phone camera, and as United States Patent (USP) the 7th, 365, shown in No. 920, it is main adopting the four-piece type lens arrangement more; But because soaring very fast of the pixel of mobile phone camera, the elemental area of photosensory assembly dwindles gradually, and under the situation that the requirement of system imaging quality improves constantly, existing four-piece type lens combination can't satisfy the more phtographic lens module of high-order, and because constantly past lightening, the high performance trend development of electronic product, therefore be badly in need of a kind ofly can be used for the high-pixel mobile phone camera, and be unlikely to the imaging len system that makes the camera lens total length long.
Summary of the invention
In the time of can't satisfying the phtographic lens of high-order more and be applied in high-pixel mobile phone in order to solve existing imaging len system, the problem that the camera lens total length is long, the invention provides a kind of imaging len system, extremely comprise in regular turn by the thing side as 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; The 3rd lens of the positive refracting power of one tool, its thing side surface be aspheric surface as at least one surface in the side surface; One the 4th lens, it is an aspheric surface as side surface, and the 4th lens be provided with at least one point of inflexion as side surface; One the 5th lens, its thing side surface is a concave surface, and the thing side surface of the 5th lens be aspheric surface as at least one surface in the side surface; And an aperture, be arranged between object and this second lens.
The present invention can effectively revise aberration with the elevator system image quality, and can shorten the optics total length of imaging len system simultaneously by the configuration mode of above-mentioned imaging len system, keeps the characteristic of miniaturization.
Imaging len of the present invention system provides positive refracting power by these first lens, and when aperture placed object side near this imaging len system, can effectively shorten the optics total length of this imaging len system.In addition, above-mentioned configuration can make the outgoing pupil (Exit Pupil) of imaging len of the present invention system away from imaging surface, light will be incident in the mode near vertical incidence on the photosensory assembly, this is the heart far away (Telecentric) characteristic of picture side, heart characteristic far away is very important for the photoperceptivity of now solid-state electronic photosensory assembly, can make the sensitization susceptibility of sense electronics optical assembly improve, the minimizing system produces the possibility at dark angle.In addition, in the aforementioned imaging len of the present invention system the 4th lens be provided with the point of inflexion as side surface, can more effectively suppress light and be incident on angle on the photosensory assembly, and the further aberration of modified off-axis visual field from the axle visual field.In addition, in the aforementioned imaging len of the present invention system, when aperture being placed more near this second lens place, can help the Wide-angle characteristic, help to receive the correction of poor (Chromatic Aberration ofMagnification), and can effectively reduce the susceptibility of imaging len of the present invention system distorting (Distortion) and multiplying power look.In other words, in the aforementioned imaging len of the present invention system, when aperture being placed more near the object place, promptly focus on heart characteristic far away, the optics total length of whole imaging len system can be shorter; When aperture being placed more near this second lens place, then focus on the characteristic of Wide-angle, can effectively be lowered into the susceptibility of picture lens combination.
The present invention also provides another kind of imaging len 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 is a convex surface; Second lens of the negative refracting power of one tool; The 3rd lens of the positive refracting power of one tool; One the 4th lens, positive refracting power of tool or negative refracting power, it is an aspheric surface as side surface, and the 4th lens be provided with at least one point of inflexion as side surface; One the 5th lens, positive refracting power of tool or negative refracting power, its thing side surface is a concave surface, and the thing side surface of the 5th lens be aspheric surface as at least one surface in the side surface; In the wherein aforementioned imaging len system, the focal length of these first lens is f1, and the focal length of the 3rd lens is f3, satisfies following relationship formula: 0＜f1/f3＜1.2; Wherein the thing side surface radius-of-curvature of these first lens is R1, and the focal length of whole imaging len system is f, satisfies following relationship formula: 0.30＜R1/f＜0.50; Wherein the abbe number of these first lens is V1, and the abbe number of these second lens is V2, satisfies following relationship formula: 22.0＜V1-V2; The lens of tool refracting power only are these first lens, second lens, the 3rd lens, the 4th lens and the 5th lens in this imaging len system.
The present invention also provides another kind of imaging len 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 is a convex surface; Second lens of the negative refracting power of one tool; One the 3rd lens, positive refracting power of tool or negative refracting power; One the 4th lens, positive refracting power of tool or negative refracting power, it is an aspheric surface as side surface, and the 4th lens be provided with at least one point of inflexion as side surface; One the 5th lens, positive refracting power of tool or negative refracting power, its thing side surface is a concave surface, and the thing side surface of the 5th lens be aspheric surface as at least one surface in the side surface; The focal length of wherein whole imaging len system is f, and the focal length of the 3rd lens is f3, satisfies the following relationship formula: 0.2＜| f/f3|; Wherein the thing side surface radius-of-curvature of these first lens is R1, and the focal length of whole imaging len system is f, satisfies following relationship formula: 0.30＜R1/f＜0.50; Wherein the abbe number of these first lens is V1, and the abbe number of these second lens is V2, satisfies following relationship formula: 22.0＜V1-V2; The lens of tool refracting power only are these first lens, second lens, the 3rd lens, the 4th lens and the 5th lens in this imaging len system.
The present invention can effectively dwindle into the optics total length of picture lens combination, the susceptibility of reduction optical system by above-mentioned configuration mode, but and the imaging performance of elevator system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute limitation of the invention.In the accompanying 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 a table one, is the optical data table of first embodiment of the invention.
Figure 10 is a table two, is the aspherical surface data table of first embodiment of the invention.
Figure 11 is a table three, is the optical data table of second embodiment of the invention.
Figure 12 is a table four, is the aspherical surface data table of second embodiment of the invention.
Figure 13 is a table five, is the optical data table of third embodiment of the invention.
Figure 14 is a table six, is the aspherical surface data table of third embodiment of the invention.
Figure 15 is a table seven, is the optical data table of fourth embodiment of the invention.
Figure 16 is a table eight, is the aspherical surface data table of fourth embodiment of the invention.
Figure 17 is a table nine, is the numerical data table of correlationship formula of the present invention.
Drawing reference numeral:
First lens 100,300,500,700
Thing side surface 101,301,501,701
Picture side surface 102,302,502,702
Second lens 110,310,510,710
Thing side surface 111,311,511,711
Picture side surface 112,312,512,712
The 3rd lens 120,320,520,720
Thing side surface 121,321,521,721
Picture side surface 122,322,522,722
The 4th lens 130,330,530,730
Thing side surface 131,331,531,731
Picture side surface 132,332,532,732
The 5th lens 140,340,540,740
Thing side surface 141,341,541,741
Picture side surface 142,342,542,742
Aperture 150,350,550,750
Infrared ray filtering optical filter 160,360,560,760
Imaging surface 170,370,570,770
The focal length of integral body imaging len system is f
The focal length of first lens is f1
The focal length of the 3rd lens is f3
The focal length of the 4th lens is f4
The focal length of the 5th lens is f5
The abbe number of first lens is V1
The abbe number of second lens is V2
Have the positive refracting power lens of a tool in the 3rd lens, the 4th lens and the 5th lens, its abbe number is Vp
Have the negative refracting power lens of a tool in the 3rd lens, the 4th lens and the 5th lens, its abbe number is Vn
The thing side surface radius-of-curvature of first lens is R1
The thing side surface of first lens to the distance of sense electronics optical assembly on optical axis is TTL
Half of sense electronics optical assembly effective pixel area diagonal angle line length is ImgH
The picture side surface of the 4th lens exists a bit, and the section of this point is Y ' perpendicular to the distance of optical axis and this point and optical axis
The effective diameter as side surface of the 4th lens is Y
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the embodiment of the invention is described in further details below in conjunction with accompanying drawing.At this, illustrative examples of the present invention and explanation thereof are used to explain the present invention, but not as a limitation of the invention.
The invention provides a kind of imaging len 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 is a convex surface; Second lens of the negative refracting power of one tool; The 3rd lens of the positive refracting power of one tool, its thing side surface be aspheric surface as at least one surface in the side surface; One the 4th lens, it is an aspheric surface as side surface, and the 4th lens be provided with at least one point of inflexion as side surface; One the 5th lens, its thing side surface is a concave surface, and the thing side surface of the 5th lens be aspheric surface as at least one surface in the side surface; And an aperture, it is arranged between object and this second lens.
In the aforementioned imaging len of the present invention system, 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 imaging len system; This second lens tool is born refracting power, the effectively aberration of revised version invention imaging len system; The positive refracting power of the 3rd lens tool can effectively distribute the refracting power of these first lens, to reduce the susceptibility of system; The 4th lens and the 5th lens can be positive refracting power or negative refracting power lens, when the 4th lens and the 5th lens all during the positive refracting power of tool, behind second lens of negative refracting power, insert the positive refracting power lens of these two tools, the generation that can effectively suppress astigmatism (Astigmatism) and distort makes the higher resolving power of imaging len system's acquisition of the present invention; When the negative refracting power of the positive refracting power of the 4th lens tool and the 5th lens tool, then forming one just, negative looking in the distance (Telephoto) structure, help shortening the back focal length of system, to reduce its optics total length; When negative refracting power of the 4th lens tool and the positive refracting power of the 5th lens tool, can effectively revise the excessive increase that coma is also avoided other aberration simultaneously; When the 4th lens and the 5th lens all during the negative refracting power of tool, can make system's principal point (Principal Point) away from imaging surface, more can shorten the optics total length of system effectively.
In the aforementioned imaging len of the present invention system, preferably, the thing side surface of the 4th lens and be respectively convex surface and concave surface as side surface is to help revising the astigmatism of aforementioned imaging len system.
In the aforementioned imaging len of the present invention system, preferably, the thing side surface of these second lens be all concave surface as side surface, with the Petzval and the number (Petzval Sum) of effective revised version invention imaging len system, and can increase the back focal length of system; The thing side surface of the 3rd lens and be respectively concave surface and convex surface as side surface can help the astigmatism of update the system.
In the aforementioned imaging len of the present invention system, when being respectively concave surface and convex surface, can guarantee that there are enough spaces imaging len system rear end, so that associated components is set when the thing side surface of the 5th lens and as side surface; When being all concave surface when the thing side surface of the 5th lens and as side surface, then effectively the Petzval of update the system and number make peripheral image planes become more flat.
In the aforementioned imaging len of the present invention system, the focal length of these first lens is f1, and the focal length of the 3rd lens is f3, and preferably, both should satisfy following relationship formula: 0＜f1/f3＜1.2.When f1/f3 satisfied the above-mentioned relation formula, the refracting power of system was mainly provided by first lens, can effectively reduce the optics total length of system, more preferably, was to satisfy following relationship formula: 0.55＜f1/f3＜1.0.
In the aforementioned imaging len of the present invention system, the focal length of whole imaging len system is f, and the focal length of the 4th lens is f4, and preferably, both should satisfy following relationship formula :-1.9＜f/f4＜0.4.When f/f4 satisfies the above-mentioned relation formula, can help the higher order aberratons of update the system, more preferably, be to satisfy following relationship formula :-1.7＜f/f4＜-0.5.
In the aforementioned imaging len of the present invention system, the abbe number of these first lens is V1, and the abbe number of second lens is V2, preferably, is to satisfy following relationship formula: 28.5＜V1-V2＜45.2.When V1-V2 satisfies the above-mentioned relation formula, can effectively revise aberration.
In the aforementioned imaging len of the present invention system, preferably, there are the positive refracting power lens of a tool in the 3rd lens, the 4th lens and the 5th lens, its abbe number is Vp, and exist a tool to bear the refracting power lens, its abbe number is Vn, and it satisfies following relationship formula: 22.0＜Vp-Vn.When the present invention satisfies the above-mentioned relation formula, the more effectively correction of strengthening system aberration.
In the aforementioned imaging len of the present invention system, the thing side surface radius-of-curvature of these first lens is R1, and the focal length of whole imaging len system is f, preferably, is to satisfy following relationship formula: 0.30＜R1/f＜0.50.When R1/f satisfies the above-mentioned relation formula, can effectively be lowered into the optics total length of picture lens combination, and can avoid the excessive increase of higher order aberratons.
In the aforementioned imaging len of the present invention system, the picture side surface of the 4th lens exists a bit, the section of this point is Y ' perpendicular to the distance of optical axis and this point and optical axis, the effective diameter (Clear Aperture Radius) of the picture side surface of the 4th lens is Y, effective diameter is defined as maximum magnitude place that this lens surface glazed thread the passes through distance to optical axis, preferably, be to satisfy following relationship formula: 0.55＜Y '/Y＜1.0.When Y '/Y satisfies the above-mentioned relation formula, can help the off-axis aberration of update the system.
In the aforementioned imaging len of the present invention system, the material of lens can be glass or plastics, 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 plastics, 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 control variable, in order to subduing aberration, and then the number that uses of reduction lens, can effectively reduce the optics total length of imaging len of the present invention system by this, preferably, at least three lens materials are plastics, and its thing side surface and be all aspheric surface as side surface.
In the aforementioned imaging len of the present invention system, preferably, this aperture is arranged between object and this first lens, promptly focuses on heart characteristic far away, and the optics total length of whole imaging len system can be shorter.
In the aforementioned imaging len of the present invention system, other is provided with a sense electronics optical assembly for the object imaging thereon, the thing side surface of these first lens to the distance of this sense electronics optical assembly on optical axis is TTL, and half of this sense electronics optical assembly effective pixel area diagonal angle line length is ImgH, preferably, be to satisfy following relationship formula: TTL/ImgH＜1.95.When TTL/ImgH satisfies the above-mentioned relation formula, help being maintained in the miniaturization of picture lens combination, to be equipped on the frivolous portable electronic product.
In the aforementioned imaging len of the present invention system, the focal length of whole imaging len system is f, and the focal length of the 5th lens is f5, preferably, is to satisfy following relationship formula :-0.58＜f/f5＜0.30.When f/f5 satisfied the above-mentioned relation formula, the effect of the 5th lens was as the revisal lens, and its function is balance and every aberration that update the system produced, and then can make the imaging len system obtain higher image quality.
The present invention provides another kind of imaging len system on the other hand, 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 is a convex surface; Second lens of the negative refracting power of one tool; The 3rd lens of the positive refracting power of one tool; One the 4th lens, positive refracting power of its tool or negative refracting power, it is an aspheric surface as side surface, and the 4th lens be provided with at least one point of inflexion as side surface; One the 5th lens, positive refracting power of its tool or negative refracting power, its thing side surface is a concave surface, and the thing side surface of the 5th lens be aspheric surface as at least one surface in the side surface; Wherein the focal length of these first lens is f1, and the focal length of the 3rd lens is f3, satisfies following relationship formula: 0＜f1/f3＜1.2; Wherein the thing side surface radius-of-curvature of these first lens is R1, and the focal length of whole imaging len system is f, satisfies following relationship formula: 0.30＜R1/f＜0.50; Wherein the abbe number of these first lens is V1, and the abbe number of these second lens is V2, satisfies following relationship formula: 22.0＜V1-V2; The lens of tool refracting power only are these first lens, second lens, the 3rd lens, the 4th lens and the 5th lens in this imaging len system.
In the aforementioned imaging len of the present invention system, when aforementioned imaging len system satisfied the relational expression of 0＜f1/f3＜1.2, the refracting power of system was mainly provided by these first lens, can reduce the optics total length of aforementioned imaging len system effectively.When aforementioned imaging len system satisfies the relational expression of 0.30＜R1/f＜0.50, can effectively reduce the optics total length of aforementioned imaging len system, and can avoid the excessive increase of higher order aberratons.When aforementioned imaging len system satisfies the relational expression of 22.0＜V1-V2, can effectively revise aberration.
The present invention provides another kind of imaging len system more on the other hand, 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 is a convex surface; Second lens of the negative refracting power of one tool; One the 3rd lens, positive refracting power of its tool or negative refracting power; One the 4th lens, positive refracting power of its tool or negative refracting power, it is an aspheric surface as side surface, and the 4th lens be provided with at least one point of inflexion as side surface; One the 5th lens, positive refracting power of its tool or negative refracting power, its thing side surface is a concave surface, and the thing side surface of the 5th lens be aspheric surface as at least one surface in the side surface; The focal length of wherein whole imaging len system is f, and the focal length of the 3rd lens is f3, satisfies the following relationship formula: 0.2＜| f/f3|; Wherein the thing side surface radius-of-curvature of these first lens is R1, and the focal length of whole imaging len system is f, satisfies following relationship formula: 0.30＜R1/f＜0.50; Wherein the abbe number of these first lens is V1, and the abbe number of these second lens is V2, satisfies following relationship formula: 22.0＜V1-V2; The lens of tool refracting power only are these first lens, second lens, the 3rd lens, the 4th lens and the 5th lens in this imaging len system.
In the aforementioned imaging len of the present invention system, when aforementioned imaging len system satisfy 0.2＜| during the relational expression of f/f3|, the 3rd lens are the required refracting power of distribution system effectively, can make that the susceptibility of system is less relatively, helps being lowered into the manufacturing degree of variation of picture lens combination.When aforementioned imaging len system satisfies the relational expression of 0.30＜R1/f＜0.50, can effectively reduce the optics total length of aforementioned imaging len system, and can avoid the excessive increase of higher order aberratons.When aforementioned imaging len system satisfies 22.0＜V1-V2 relational expression, can effectively revise aberration.
In the imaging len of the present invention system, the material of lens can be glass or plastics, 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 plastics, 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 control variable, in order to subduing aberration, and then the number that uses of reduction lens, therefore can effectively reduce the optics total length of imaging len of the present invention system.
In the imaging len of the present invention system,, 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.
Imaging len of the present invention system will be described in detail by following specific embodiment conjunction with figs..First embodiment:
First embodiment of the invention sees also Fig. 1, and the aberration curve of first embodiment sees also Fig. 2.The imaging len system of first embodiment mainly is made of five pieces of lens, is extremely comprised in regular turn as side by the thing side:
First lens (100) of the positive refracting power of one tool, its thing side surface (101) and picture side surface (102) are all convex surface, and its material is plastics, the thing side surface (101) of these first lens (100), is all aspheric surface as side surface (102);
Second lens (110) of the negative refracting power of one tool, its thing side surface (111) and picture side surface (112) are all concave surface, and its material is plastics, the thing side surface (111) of these second lens (110), is all aspheric surface as side surface (112);
The 3rd lens (120) of the positive refracting power of one tool, its thing side surface (121) be concave surface and picture side surface (122) for convex surface, its material is plastics, the thing side surface (121) of the 3rd lens (120), is all aspheric surface as side surface (122);
The 4th lens (130) of the positive refracting power of one tool, its thing side surface (131) is that convex surface and picture side surface (132) are concave surface, its material is plastics, the thing side surface (131) of the 4th lens (130), be all aspheric surface as side surface (132), and the thing side surface (131) of the 4th lens (130), as all being provided with at least one point of inflexion on the side surface (132);
The 5th lens (140) of the negative refracting power of one tool, its thing side surface (141) and picture side surface (142) are all concave surface, and its material is plastics, the thing side surface (141) of the 5th lens (140), is all aspheric surface as side surface (142); And
One aperture (150) places between object and this first lens (100);
Other includes an infrared ray filtering optical filter (IR Filter) (160) and places looking like between side surface (142) and the imaging surface (170) of the 5th lens (140); This infrared ray filtering optical filter (160) does not influence the focal length of imaging len of the present invention system.
The equation of above-mentioned aspheric curve is expressed as follows:
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 imaging len system, the focal length of whole imaging len system is f, and its relational expression is: f=4.31.
In the first embodiment imaging len system, the f-number (f-number) of whole imaging len system is Fno, and its relational expression is: Fno=2.85.
In the first embodiment imaging len system, the half angle of view of whole imaging len system is HFOV, and its relational expression is: the HFOV=33.9 degree.
In the first embodiment imaging len system, the focal length of these first lens (100) is f1, and the focal length of the 3rd lens (120) is f3, and its relational expression is:
f1/f3＝0.22。
In the first embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 4th lens (130) is f4, and its relational expression is:
f/f4＝0.07。
In the first embodiment imaging len system, the abbe number of these first lens (100) is V1, and the abbe number of these second lens (110) is V2, and its relational expression is:
V1-V2＝32.5。
In the first embodiment imaging len system, the abbe number of the 3rd lens (120) of the positive refracting power of tool is Vp=55.9, the abbe number of the 4th lens (130) of the positive refracting power of tool is Vp=55.9, and the abbe number of the 5th lens (140) of the negative refracting power of tool is Vn=30.2, and its relational expression is:
Vp-Vn=25.7 (the 3rd lens 120 and the 5th lens 140);
Vp-Vn=25.7 (the 4th lens 130 and the 5th lens 140).
In the first embodiment imaging len system, thing side surface (101) radius-of-curvature of these first lens (100) is R1, and the focal length of whole imaging len system is f, and its relational expression is:
R1/f＝0.41。
In the first embodiment imaging len system, the picture side surface (132) of the 4th lens (130) exists a bit, the section of this point is Y ' (joining shown in Figure 1) perpendicular to the distance of optical axis and this point and optical axis, the effective diameter of the picture side surface (132) of the 4th lens is Y (joining shown in Figure 1), and its relational expression is:
Y′/Y＝0.68。
In the first embodiment imaging len system, this imaging len system is provided with a sense electronics optical assembly in addition and locates for the object imaging thereon in this imaging surface (170), the thing side surface (101) of these first lens (100) to the distance of this sense electronics optical assembly on optical axis is TTL, and half of this sense electronics optical assembly effective pixel area diagonal angle line length is ImgH, and its relational expression is:
TTL/ImgH＝1.74。
In the first embodiment imaging len system, the focal length of the 5th lens (140) is f5, and the focal length of whole imaging len system is f, and its relational expression is:
f/f5＝-0.55。
In the first embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 3rd lens (120) is f3, and its relational expression is:
|f/f3|＝0.30。
The detailed optical data of first embodiment is shown in Fig. 9 table one, and its aspherical surface data is shown in Figure 10 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 imaging len system of second embodiment mainly is made of five pieces of lens, is extremely comprised in regular turn as side by the thing side:
First lens (300) of the positive refracting power of one tool, its thing side surface (301) and picture side surface (302) are all convex surface, and its material is plastics, the thing side surface (301) of these first lens (300), is all aspheric surface as side surface (302);
Second lens (310) of the negative refracting power of one tool, its thing side surface (311) and picture side surface (312) are all concave surface, and its material is plastics, the thing side surface (311) of these second lens (310), is all aspheric surface as side surface (312);
The 3rd lens (320) of the positive refracting power of one tool, its thing side surface (321) be concave surface and picture side surface (322) for convex surface, its material is plastics, the thing side surface (321) of the 3rd lens (320), is all aspheric surface as side surface (322);
The 4th lens (330) of the negative refracting power of one tool, its thing side surface (331) is that convex surface and picture side surface (332) are concave surface, its material is plastics, the thing side surface (331) of the 4th lens (330), be all aspheric surface as side surface (332), and the thing side surface (331) of the 4th lens (330), as all being provided with at least one point of inflexion on the side surface (332);
The 5th lens (340) of the negative refracting power of one tool, its thing side surface (341) and picture side surface (342) are all concave surface, and its material is plastics, the thing side surface (341) of the 5th lens (340), is all aspheric surface as side surface (342); And
One aperture (350) places between object and this first lens (300);
Other includes an infrared ray filtering optical filter (IR Filter) (360) and places looking like between side surface (342) and the imaging surface (370) of the 5th lens (340); This infrared ray filtering optical filter (360) does not influence the focal length of imaging len of the present invention system.
The equational expression of the second embodiment aspheric curve is as the form of first embodiment.
In the second embodiment imaging len system, the focal length of whole imaging len system is f, and its relational expression is: f=4.46.
In the second embodiment imaging len system, the f-number (f-number) of whole imaging len system is Fno, and its relational expression is: Fno=2.78.
In the second embodiment imaging len system, the half angle of view of whole imaging len system is HFOV, and its relational expression is: the HFOV=33.0 degree.
In the second embodiment imaging len system, the focal length of these first lens (300) is f1, and the focal length of the 3rd lens (320) is f3, and its relational expression is:
f1/f3＝0.23。
In the second embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 4th lens (330) is f4, and its relational expression is:
f/f4＝-0.05。
In the second embodiment imaging len system, the abbe number of these first lens (300) is V1, and the abbe number of these second lens (310) is V2, and its relational expression is:
V1-V2＝32.5。
In the second embodiment imaging len system, the abbe number of the 3rd lens (320) of the positive refracting power of tool is Vp=55.9, the abbe number of the 4th lens (330) of the negative refracting power of tool is Vn=55.9, and the abbe number of the 5th lens (340) of the negative refracting power of tool is Vn=30.2, and its relational expression is:
Vp-Vn=0.0 (the 3rd lens 320 and the 4th lens 330);
Vp-Vn=25.7 (the 3rd lens 320 and the 5th lens 340).
In the second embodiment imaging len system, thing side surface (301) radius-of-curvature of these first lens (300) is R1, and the focal length of whole imaging len system is f, and its relational expression is:
R1/f＝0.39。
In the second embodiment imaging len system, the picture side surface (332) of the 4th lens (330) exists a bit, the section of this point is Y ' (joining shown in Figure 3) perpendicular to the distance of optical axis and this point and optical axis, the effective diameter of the picture side surface (332) of the 4th lens (330) is Y (joining shown in Figure 3), and its relational expression is:
Y′/Y＝0.67。
In the second embodiment imaging len system, this imaging len system is provided with a sense electronics optical assembly in addition and locates for the object imaging thereon in this imaging surface (370), the thing side surface (301) of these first lens (300) to the distance of this sense electronics optical assembly on optical axis is TTL, and half of this sense electronics optical assembly effective pixel area diagonal angle line length is ImgH, and its relational expression is:
TTL/ImgH＝1.78。
In the second embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 5th lens (340) is f5, and its relational expression is:
f/f5＝-0.55。
In the second embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 3rd lens (320) is f3, and its relational expression is:
|f/f3|＝0.34。
The detailed optical data of second embodiment is shown in Figure 11 table three, and its aspherical surface data is shown in Figure 12 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 imaging len system of the 3rd embodiment mainly is made of five pieces of lens, is extremely comprised in regular turn as side by the thing side:
First lens (500) of the positive refracting power of one tool, its thing side surface (501) and picture side surface (502) are all convex surface, and its material is plastics, the thing side surface (501) of these first lens (500), is all aspheric surface as side surface (502);
Second lens (510) of the negative refracting power of one tool, its thing side surface (511) and picture side surface (512) are all concave surface, and its material is plastics, the thing side surface (511) of these second lens (510), is all aspheric surface as side surface (512);
The 3rd lens (520) of the positive refracting power of one tool, its thing side surface (521) be concave surface and picture side surface (522) for convex surface, its material is plastics, the thing side surface (521) of the 3rd lens (520), is all aspheric surface as side surface (522);
The 4th lens (530) of the negative refracting power of one tool, its thing side surface (531) is that convex surface and picture side surface (532) are concave surface, its material is plastics, the thing side surface (531) of the 4th lens (530), be all aspheric surface as side surface (532), and the thing side surface (531) of the 4th lens (530), as all being provided with at least one point of inflexion on the side surface (532);
The 5th lens (540) of the negative refracting power of one tool, its thing side surface (541) and picture side surface (542) are all concave surface, and its material is plastics, the thing side surface (541) of the 5th lens (540), is all aspheric surface as side surface (542); And
One aperture (550) places between object and this first lens (500);
Other includes an infrared ray filtering optical filter (IR Filter) (560) and places looking like between side surface (542) and the imaging surface (570) of the 5th lens (540); This infrared ray filtering optical filter (560) does not influence the focal length of imaging len of the present invention system.
The equational expression of the 3rd embodiment aspheric curve is as the pattern of first embodiment.
In the 3rd embodiment imaging len system, the focal length of whole imaging len system is f, and its relational expression is: f=5.33.
In the 3rd embodiment imaging len system, the f-number (f-number) of whole imaging len system is Fno, and its relational expression is: Fno=2.90.
In the 3rd embodiment imaging len system, the half angle of view of whole imaging len system is HFOV, and its relational expression is: the HFOV=33.5 degree.
In the 3rd embodiment imaging len system, the focal length of these first lens (500) is f1, and the focal length of the 3rd lens (520) is f3, and its relational expression is:
f1/f3＝0.70。
In the 3rd embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 4th lens (530) is f4, and its relational expression is:
f/f4＝-0.84。
In the 3rd embodiment imaging len system, the abbe number of these first lens (500) is V1, and the abbe number of these second lens (510) is V2, and its relational expression is:
V1-V2＝32.5。
In the 3rd embodiment imaging len system, the abbe number of the 3rd lens (520) of the positive refracting power of tool is Vp=55.9, the abbe number of the 4th lens (530) of the negative refracting power of tool is Vn=55.9, and the abbe number of the 5th lens (540) of the negative refracting power of tool is Vn=23.4, and its relational expression is:
Vp-Vn=0.0 (the 3rd lens 520 and the 4th lens 530);
Vp-Vn=32.5 (the 3rd lens 520 and the 5th lens 540).
In the 3rd embodiment imaging len system, thing side surface (501) radius-of-curvature of these first lens (500) is R1, and the focal length of whole imaging len system is f, and its relational expression is:
R1/f＝0.37。
In the 3rd embodiment imaging len system, the picture side surface (532) of the 4th lens (530) exists a bit, the section of this point is Y ' (joining shown in Figure 5) perpendicular to the distance of optical axis and this point and optical axis, the effective diameter of the picture side surface (532) of the 4th lens (530) is Y (joining shown in Figure 5), and its relational expression is:
Y′/Y＝0.66。
In the 3rd embodiment imaging len system, this imaging len system is provided with a sense electronics optical assembly in addition and locates for the object imaging thereon in this imaging surface (570), the thing side surface (501) of these first lens (500) to the distance of this sense electronics optical assembly on optical axis is TTL, and half of this sense electronics optical assembly effective pixel area diagonal angle line length is ImgH, and its relational expression is:
TTL/ImgH＝1.66。
In the 3rd embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 5th lens (540) is f5, and its relational expression is:
f/f5＝-0.17。
In the 3rd embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 3rd lens (520) is f3, and its relational expression is:
|f/f3|＝1.08。
The detailed optical data of the 3rd embodiment is shown in Figure 13 table five, and its aspherical surface data is shown in Figure 14 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 imaging len system of the 4th embodiment mainly is made of five pieces of lens, is extremely comprised in regular turn as side by the thing side:
First lens (700) of the positive refracting power of one tool, its thing side surface (701) and picture side surface (702) are all convex surface, and its material is plastics, the thing side surface (701) of these first lens (700), is all aspheric surface as side surface (702);
Second lens (710) of the negative refracting power of one tool, its thing side surface (711) and picture side surface (712) are all concave surface, and its material is plastics, the thing side surface (711) of these second lens (710), is all aspheric surface as side surface (712);
The 3rd lens (720) of the positive refracting power of one tool, its thing side surface (721) be concave surface and picture side surface (722) for convex surface, its material is plastics, the thing side surface (721) of the 3rd lens (720), is all aspheric surface as side surface (722);
The 4th lens (730) of the negative refracting power of one tool, its thing side surface (731) is that convex surface and picture side surface (732) are concave surface, its material is plastics, the thing side surface (731) of the 4th lens (730), be all aspheric surface as side surface (732), and the thing side surface (731) of the 4th lens (730), as all being provided with at least one point of inflexion on the side surface (732);
The 5th lens (740) of the negative refracting power of one tool, its thing side surface (741) and picture side surface (742) are all concave surface, and its material is plastics, the thing side surface (741) of the 5th lens (740), is all aspheric surface as side surface (742); And
One aperture (750) places between object and this first lens (700);
Other includes an infrared ray filtering optical filter (IR Filter) (760) and places looking like between side surface (742) and the imaging surface (770) of the 5th lens (740); This infrared ray filtering optical filter (760) does not influence the focal length of imaging len of the present invention system.
The equational expression of the 4th embodiment aspheric curve is as the pattern of first embodiment.
In the 4th embodiment imaging len system, the focal length of whole imaging len system is f, and its relational expression is: f=5.80.
In the 4th embodiment imaging len system, the f-number (f-number) of whole imaging len system is Fno, and its relational expression is: Fno=2.45.
In the 4th embodiment imaging len system, the half angle of view of whole imaging len system is HFOV, and its relational expression is: the HFOV=33.5 degree.
In the 4th embodiment imaging len system, the focal length of these first lens (700) is f1, and the focal length of the 3rd lens (720) is f3, and its relational expression is:
f1/f3＝0.95。
In the 4th embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 4th lens (730) is f4, and its relational expression is:
f/f4＝-1.50。
In the 4th embodiment imaging len system, the abbe number of these first lens (700) is V1, and the abbe number of these second lens (710) is V2, and its relational expression is:
V1-V2＝32.5。
In the 4th embodiment imaging len system, the abbe number of the 3rd lens (720) of the positive refracting power of tool is Vp=55.9, the abbe number of the 4th lens (730) of the negative refracting power of tool is Vn=55.9, and the abbe number of the 5th lens (740) of the negative refracting power of tool is Vn=23.4, and its relational expression is:
Vp-Vn=0.0 (the 3rd lens 720 and the 4th lens 730);
Vp-Vn=32.5 (the 3rd lens 720 and the 5th lens 740).
In the 4th embodiment imaging len system, thing side surface (701) radius-of-curvature of these first lens (700) is R1, and the focal length of whole imaging len system is f, and its relational expression is:
R1/f＝0.36。
In the 4th embodiment imaging len system, the picture side surface (732) of the 4th lens (730) exists a bit, the section of this point is Y ' (joining shown in Figure 7) perpendicular to the distance of optical axis and this point and optical axis, the effective diameter of the picture side surface (732) of the 4th lens (730) is Y (joining shown in Figure 7), and its relational expression is:
Y′/Y＝0.66。
In the 4th embodiment imaging len system, this imaging len system is provided with a sense electronics optical assembly in addition and locates for the object imaging thereon in this imaging surface (770), the thing side surface (701) of these first lens (700) to the distance of this sense electronics optical assembly on optical axis is TTL, and half of this sense electronics optical assembly effective pixel area diagonal angle line length is ImgH, and its relational expression is:
TTL/ImgH＝1.62。
In the 4th embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 5th lens (740) is f5, and its relational expression is:
f/f5＝-0.14。
In the 4th embodiment imaging len system, the focal length of whole imaging len system is f, and the focal length of the 3rd lens (720) is f3, and its relational expression is:
|f/f3|＝1.45。
The detailed optical data of the 4th embodiment is shown in Figure 15 table seven, and its aspherical surface data is shown in Figure 16 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.
Table one is depicted as the different numerical value change tables of imaging len system embodiment of the present invention to table eight (corresponding diagram 9 is to Figure 16 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 describe and graphic in illustrated only as exemplary, non-in order to limit claim of the present invention.Table nine (corresponding Figure 17) is the numerical data table of the corresponding correlationship formula of the present invention of each embodiment.
The present invention can effectively dwindle into the optics total length of picture lens combination, the susceptibility of reduction optical system by the configuration mode of the foregoing description, but and the imaging performance of elevator system.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (20)
1. an imaging len system is characterized in that, described imaging len system by the thing side to comprising in regular turn as side:
First lens of the positive refracting power of one tool, the described first lens thing side surface is a convex surface;
Second lens of the negative refracting power of one tool;
The 3rd lens of the positive refracting power of one tool, described the 3rd lens thing side surface be aspheric surface as at least one surface in the side surface;
One the 4th lens, described the 4th lens are aspheric surface as side surface, and described the 4th lens be provided with at least one point of inflexion as side surface;
One the 5th lens, described the 5th lens thing side surface is a concave surface, and the thing side surface of described the 5th lens be aspheric surface as at least one surface in the side surface; And
One aperture is arranged between object and described second lens.
2. imaging len as claimed in claim 1 system is characterized in that, the thing side surface of described the 4th lens and be respectively convex surface and concave surface as side surface.
3. imaging len as claimed in claim 2 system is characterized in that, the thing side surface of described second lens and be all concave surface as side surface, the thing side surface of described the 3rd lens and be respectively concave surface and convex surface as side surface.
4. imaging len as claimed in claim 1 system is characterized in that the focal length of described first lens is f1, and the focal length of described the 3rd lens is f3, and satisfies the following relationship formula:
0＜f1/f3＜1.2。
5. imaging len as claimed in claim 4 system is characterized in that, the focal length of wherein whole imaging len system is f, and the focal length of described the 4th lens is f4, and satisfies the following relationship formula:
-1.9＜f/f4＜0.4。
6. imaging len as claimed in claim 5 system is characterized in that, the focal length of described whole imaging len system is f, and the focal length of described the 4th lens is f4, and satisfies the following relationship formula:
-1.7＜f/f4＜-0.5。
7. imaging len as claimed in claim 4 system is characterized in that the focal length of described first lens is f1, and the focal length of described the 3rd lens is f3, and satisfies the following relationship formula:
0.55＜f1/f3＜1.0。
8. imaging len as claimed in claim 4 system is characterized in that described the 5th lens tool is born refracting power.
9. imaging len as claimed in claim 8 system is characterized in that, described the 5th lens be concave surface as side surface.
10. imaging len as claimed in claim 1 system is characterized in that the abbe number of described first lens is V1, and the abbe number of described second lens is V2, and satisfies the following relationship formula:
28.5＜V1-V2＜45.2。
11. imaging len as claimed in claim 10 system, it is characterized in that, there are the positive refracting power lens of a tool in described the 3rd lens, the 4th lens and described the 5th lens, the abbe number of the positive refracting power lens of described tool is Vp, and there are the negative refracting power lens of a tool in described the 3rd lens, the 4th lens and described the 5th lens, the abbe number of the negative refracting power lens of described tool is Vn, and satisfies the following relationship formula:
22.0＜Vp-Vn。
12. imaging len as claimed in claim 1 system is characterized in that the thing side surface radius-of-curvature of described first lens is R1, the focal length of described whole imaging len system is f, and satisfies the following relationship formula:
0.30＜R1/f＜0.50。
13. imaging len as claimed in claim 1 system, it is characterized in that the picture side surface of described the 4th lens exists a bit, the section of described point is Y ' perpendicular to the distance of optical axis and described point and optical axis, the effective diameter as side surface of described the 4th lens is Y, and satisfies the following relationship formula:
0.55＜Y′/Y＜1.0。
14. imaging len as claimed in claim 1 system is characterized in that, at least three lens materials are plastics in the described imaging len system, and the thing side surface of plastic lens and be all aspheric surface as side surface.
15. imaging len as claimed in claim 14 system is characterized in that, the lens of tool refracting power only are described first lens, second lens, the 3rd lens, the 4th lens and described the 5th lens in the described imaging len system.
16. imaging len as claimed in claim 1 system is characterized in that described aperture is arranged between object and described first lens.
17. imaging len as claimed in claim 16 system, it is characterized in that, described imaging len system is provided with a sense electronics optical assembly for the object imaging thereon in addition, the thing side surface of described first lens to the distance of described sense electronics optical assembly on optical axis is TTL, and half of described sense electronics optical assembly effective pixel area diagonal angle line length is ImgH, and satisfies the following relationship formula:
TTL/ImgH＜1.95。
18. imaging len as claimed in claim 4 system is characterized in that, the focal length of described whole imaging len system is f, and the focal length of described the 5th lens is f5, and satisfies the following relationship formula:
-0.58＜f/f5＜0.30。
19. an imaging len system is characterized in that, described imaging len system by the thing side to comprising in regular turn as side:
First lens of the positive refracting power of one tool, the thing side surface of described first lens is a convex surface;
Second lens of the negative refracting power of one tool;
The 3rd lens of the positive refracting power of one tool;
One the 4th lens, positive refracting power of tool or negative refracting power, described the 4th lens be aspheric surface as side surface, and described the 4th lens be provided with at least one point of inflexion as side surface; And
One the 5th lens, positive refracting power of tool or negative refracting power, the thing side surface of described the 5th lens is a concave surface, and the thing side surface of described the 5th lens be aspheric surface as at least one surface in the side surface;
The focal length of wherein said first lens is f1, and the focal length of described the 3rd lens is f3, and satisfies the following relationship formula:
0＜f1/f3＜1.2；
The thing side surface radius-of-curvature of wherein said first lens is R1, and the focal length of described whole imaging len system is f, and satisfies the following relationship formula:
0.30＜R1/f＜0.50；
The abbe number of wherein said first lens is V1, and the abbe number of described second lens is V2, and satisfies the following relationship formula:
22.0＜V1-V2；
The lens of tool refracting power only are described first lens, second lens, the 3rd lens, the 4th lens and described the 5th lens in the described imaging len system.
20. an imaging len system is characterized in that, described imaging len system by the thing side to comprising in regular turn as side:
First lens of the positive refracting power of one tool, the thing side surface of described first lens is a convex surface;
Second lens of the negative refracting power of one tool;
One the 3rd lens, positive refracting power of tool or negative refracting power;
One the 4th lens, positive refracting power of tool or negative refracting power, described the 4th lens be aspheric surface as side surface, and described the 4th lens be provided with at least one point of inflexion as side surface; And
One the 5th lens, positive refracting power of tool or negative refracting power, the thing side surface of described the 5th lens is a concave surface, and the thing side surface of described the 5th lens be aspheric surface as at least one surface in the side surface;
The focal length of wherein whole imaging len system is f, and the focal length of described the 3rd lens is f3, and satisfies the following relationship formula:
0.2＜|f/f3|；
The thing side surface radius-of-curvature of wherein said first lens is R1, and the focal length of described whole imaging len system is f, and satisfies the following relationship formula:
0.30＜R1/f＜0.50；
The abbe number of wherein said first lens is V1, and the abbe number of described second lens is V2, and satisfies the following relationship formula:
22.0＜V1-V2；
The lens of tool refracting power only are described first lens, second lens, the 3rd lens, the 4th lens and described the 5th lens in the described imaging len system.
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