CN101995642B - Optical imaging lens group - Google Patents
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- CN101995642B CN101995642B CN2009101685467A CN200910168546A CN101995642B CN 101995642 B CN101995642 B CN 101995642B CN 2009101685467 A CN2009101685467 A CN 2009101685467A CN 200910168546 A CN200910168546 A CN 200910168546A CN 101995642 B CN101995642 B CN 101995642B
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Abstract
The invention discloses an optical imaging lens group, comprising an aperture, a first lens with positive refraction force, a second lens with negative refraction force and a third lens with negative refraction force from object side to image side in sequence, wherein the front and rear surfaces of the first lens are convex; the front surface of the second lens is concave and the rear surface thereof is convex; at least one surface of the second lens is provided with aspheric surface; the second lens is made of plastic materials; the front surface of the third lens is convex and the rear surface thereof is concave; at least one surface of the third lens is provided with aspheric surface; the third lens is made of plastic materials; in the optical imaging lens group, the number of the lens with refraction force is limited to three; the focal length of the whole optical imaging lens group is f; the focal length of the first lens is f1; the focal length of the second lens is f2; the focal length of the third lens is f3; the abbe number of the first lens is V1; the abbe number of the second lens is V2; the distance between the second lens and the third lens on the optical axis is T23; f/f1 is more than 0.8 and less than 1.8; the absolute value of f/f2 is more than 0 and less than 0.8; the absolute value of f/f3 is more than 0 and less than 0.7; V1 minus V2 is more than 20 and less than 38; and T23/f is more than 0.13 and less than 0.21.
Description
Technical field
The present invention relates to about a kind of image optics mirror group, particularly refer to a kind of miniaturization image optics mirror group that is applied to camera cell phone.
Background technology
Recent years, along with the rise of mobile phone camera, the demand of miniaturization phtographic lens day by day improves; And the photo-sensitive cell of general phtographic lens is nothing more than being sensitization coupling element (Charge CoupledDevice; CCD) or complementary matal-oxide semiconductor (Complementary Metal-OxideSemiconductor, CMOS) two kinds, and because the manufacture of semiconductor development of technology; Make the picture element area of photo-sensitive cell dwindle; The miniaturization phtographic lens is the development toward high picture element field gradually, therefore, and to the also increase day by day of requirement of image quality.
At present, be equipped on the phtographic lens of mobile phone, adopt three pieces of formula lens arrangements more; It is first lens of the positive refracting power of a tool as side extremely from the thing side in regular turn; Second lens of the negative refracting power of one tool and the 3rd lens of the positive refracting power of a tool constitute so-called Triplet pattern, like USP 7; Shown in 436,603.Pattern although it is so can be revised most aberration that this optical system produces; Also has simultaneously visual angle comparatively widely; But its demand for the optics total length is bigger; Cause lens construction must cooperate the optics total length and increase, so that be difficult to satisfy phtographic lens more frivolous, miniaturization and use.
Summary of the invention
In order to promote the image quality of optical system, and the effective optics total length of controls lens, making its characteristic that has miniaturization concurrently, the present invention provides a kind of image optics mirror group that is made up of three lens, and its main idea is following:
A kind of image optics mirror group is extremely comprised as side by the thing side: an aperture in regular turn; First lens of the positive refracting power of one tool, its front surface are that the surface is convex surface behind the convex surface; Second lens of the negative refracting power of one tool, its front surface are that the surface is convex surface behind the concave surface; The 3rd lens of the negative refracting power of one tool, its front surface are that the surface is concave surface behind the convex surface; In the image optics mirror group, the number of lenses of tool refracting power is restricted to three; By above-mentioned configuration, the effective image quality of elevator system, and have the characteristic of miniaturization concurrently.
The refracting power of image optics mirror group of the present invention mainly is that first lens by the positive refracting power of tool provide, and first lens are to be a biconvex lens, can effectively strengthen the refracting power configuration of first lens, and then can make the optics total length of image optics mirror group become shorter; Its function of second lens of the negative refracting power of tool is mainly the aberration (Chromatic Aberration) of update the system; And the 3rd lensing is as the revisal lens; Its function is balance and each aberration that update the system produced; And the 3rd lens tool is born refracting power; The principal point (Principal Point) that can make optical system is further from imaging surface, and helps shortening the optics total length of system, to keep the miniaturization of camera lens.
By first lens main positive refracting power is provided, and aperture is placed the object side near image optics mirror group, can effectively shorten the optics total length of image optics mirror group; In addition; Above-mentioned configuration can make the outgoing pupil (Exit Pupil) of image optics mirror group away from imaging surface, and therefore, light will be incident on the mode near vertical incidence on the photo-sensitive cell; This is the heart far away (Telecentric) characteristic of imaging side; Heart characteristic far away is very important for the photoperceptivity of solid-state electronic photo-sensitive cell at present, and with making the sensitization susceptibility of sense electronics optical element improve, the minimizing system produces the possibility at dark angle.In addition, be provided with the point of inflexion (Inflection Point), with the angle of more effectively suppressing on the light incident photo-sensitive cell of axle visual field at the 3rd lens surface.
Along with the trend of lens of photographic mobile phone miniaturization, and system need contain visual angle widely, makes the focal length of optical system become very short; In this case, it is very little that the radius-of-curvature of eyeglass and lens dimension all become, and the mode of grinding with traditional glass will be difficult to produce above-mentioned eyeglass; Therefore; On eyeglass, can adopt plastic cement material, make eyeglass, can use eyeglass than less cost production high precision by the mode of ejection formation; And can aspheric surface be set in lens surface, aspheric surface can be made into the shape beyond the sphere easily, obtains more controlled variable, in order to subduing aberration, and then the number of reduction eyeglass use, can effectively shorten the optics total length of image optics mirror group by this.
In the image optics mirror group of the present invention, the focal length of whole image optics mirror group is f, and the focal length of first lens is f1, and its relation is:
0.8＜f/f1＜1.8；
When f/f1 satisfied the above-mentioned relation formula, the refracting power size configure of first lens is balance comparatively, and effectively the optics total length of control system is kept the target of miniaturization, and helped the higher order aberratons of update the system, and then promoted image quality; Further, f/f1 satisfies and remembers that down relation is then comparatively desirable:
1.2＜f/f1＜1.6。
In the image optics mirror group of the present invention, the focal length of whole image optics mirror group is f, and the focal length of second lens is f2, and its relation is:
0＜|f/f2|＜0.8；
When f/f2 satisfies the above-mentioned relation formula, can help the correction of aberration in the image optics mirror group of the present invention; Further, f/f2 satisfies and remembers that down relation is then comparatively desirable:
0.2＜|f/f2|＜0.6。
In the image optics mirror group of the present invention, the focal length of whole image optics mirror group is f, and the focal length of the 3rd lens is f3, and its relation is:
0＜|f/f3|＜0.7；
When f/f3 satisfied the above-mentioned relation formula, the 3rd lens of the negative refracting power of tool, the principal point that can make optical system were away from imaging surface, and the optics total length that is beneficial to the shortening system is arranged, to keep the miniaturization of camera lens; Further, f/f3 satisfies and remembers that down relation is then comparatively desirable:
0.14＜|f/f3|＜0.7。
In the image optics mirror group of the present invention, the first lens abbe number (Abbe Number) is V1, and the second lens abbe number is V2, and its relation is:
20＜V1-V2＜38；
When V1 and V2 satisfy the above-mentioned relation formula, can help the correction of aberration in the image optics mirror group, improve the image quality of image optics mirror group; Further, V1 and V2 satisfy and remember that down relation is then comparatively desirable:
28＜V1-V2＜35；
V2＜25。
In the image optics mirror group of the present invention, first lens and the distance of second lens on optical axis are T12, and second lens and the distance of the 3rd lens on optical axis are T23, and the focal length of whole image optics mirror group is f, and its relation is:
0.08＜T12/f＜0.13；
0＜T23/f＜0.21；
When T12/f and T23/f satisfy the above-mentioned relation formula, can effectively promote the ability of image optics mirror group correction higher order aberratons; Further, T23/f satisfies and remembers that down relation is then comparatively desirable:
0.13＜T23/f＜0.21；
Further, note concerns then even more ideal to make T23/f satisfy down:
0.15＜T23/f＜0.18。
In the image optics mirror group of the present invention, the front surface radius-of-curvature of first lens is R1, and the back surface curvature radius of first lens is R2, and its relation is:
-0.8＜R1/R2＜0；
When R1/R2 satisfies the above-mentioned relation formula, can help the correction of spherical aberration in the image optics mirror group (Spherical Aberration).
In the image optics mirror group of the present invention, the focal length of whole image optics mirror group is f, and the focal length of the 3rd lens is f3, and its relation is:
0＜|f/f3|＜0.4；
When f/f3 satisfies the above-mentioned relation formula; The 3rd lensing is then as the revisal lens; Its function is balance and each aberration that update the system produced, can help being modified to the astigmatism (Astigmatism) of picture optical frames group and distorting (Distortion), promotes the resolving power of image optics mirror group; Further, f/f3 satisfies and remembers that down relation is then comparatively desirable:
0＜|f/f3|＜0.2。
In the image optics mirror group of the present invention; Other is provided with a sense electronics optical element and supplies the object imaging; The optics total length of image optics mirror group is TTL, and TTL is defined as the distance of front surface to imaging surface on optical axis of first lens in the image optics mirror group, and the maximum imaging of image optics mirror group highly is ImgH; ImgH is defined as the half the of the effective picture element of sense electronics optical element zone diagonal line length, and its relation is:
TTL/ImgH＜2.3；
When TTL/ImgH satisfies the above-mentioned relation formula, can be maintained in the characteristic of picture optical frames group miniaturization.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Fig. 1 is a first embodiment of the invention optical system synoptic diagram.
Fig. 2 is the aberration curve figure of first embodiment of the invention.
Fig. 3 is a second embodiment of the invention optical system synoptic diagram.
Fig. 4 is the aberration curve figure of second embodiment of the invention.
Fig. 5 is a third embodiment of the invention optical system synoptic diagram.
Fig. 6 is the aberration curve figure of third embodiment of the invention.
Main element symbol description among the figure:
Surface, front surface 11 back 12
Surface, front surface 21 back 22
The 3rd lens 30
Surface, front surface 31 back 32
Infrared ray filtering optical filter 50
Photo-sensitive cell cover glass 60
Embodiment
First embodiment of the invention sees also Fig. 1, and the aberration curve of first embodiment sees also Fig. 2, and first embodiment is extremely comprised as side by the thing side in regular turn:
The 3rd lens 30 of the negative refracting power of one tool; Its material is a plastic cement, and the front surface 31 of the 3rd lens 30 is a convex surface, and surface, back 32 is a concave surface; The front surface 31 of the 3rd lens 30 all is provided with aspheric surface with surface, back 32 in addition, and the front surface 31 of the 3rd lens 30 all is provided with the point of inflexion with surface, back 32;
One aperture 40 places before first lens 10;
One infrared ray filtering optical filter (IR Filter) 50 places after the 3rd lens 30, and it does not influence the focal length of system;
One photo-sensitive cell cover glass (Sensor Cover Glass) 60 places after the infrared ray filtering optical filter 50;
One imaging surface 70 places after the photo-sensitive cell cover glass 60.
The equation of above-mentioned aspheric curve is represented as follows:
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.
Among first embodiment, the focal length of whole image optics mirror group is f, and the focal length of first lens is f1, and the focal length of second lens is f2, and the focal length of the 3rd lens is f3, and its relation is:
f＝2.85mm；
f/f1＝1.45；
|f/f2|＝0.54；
|f/f3|＝0.01。
Among first embodiment, the first lens abbe number (Abbe Number) is V1, and the second lens abbe number is V2, and its relation is:
V2＝23.4；
V1-V2＝33.1。
Among first embodiment, the focal length of whole image optics mirror group is f, and first lens and the distance of second lens on optical axis are T12, and second lens and the distance of the 3rd lens on optical axis are T23, and its relation is:
T12/f＝0.10；
T23/f＝0.17。
Among first embodiment, the front surface radius-of-curvature of first lens is R1, and the back surface curvature radius of first lens is R2, and its relation is: R1/R2=-0.24.
Among first embodiment, image optics mirror group is provided with a sense electronics optical element in addition and supplies the object imaging, and the optics total length of image optics mirror group is TTL, and the maximum imaging of image optics mirror group highly is ImgH, and its relation is: TTL/ImgH=2.19.
The detailed structured data of first embodiment is as shown in the table 1, and its aspherical surface data is as shown in the table 2, and wherein, the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
Second embodiment of the invention sees also Fig. 3, and the aberration curve of second embodiment sees also Fig. 4, and second embodiment is extremely comprised as side by the thing side in regular turn:
The 3rd lens 30 of the negative refracting power of one tool; Its material is a plastic cement, and the front surface 31 of the 3rd lens 30 is a convex surface, and surface, back 32 is a concave surface; The front surface 31 of the 3rd lens 30 all is provided with aspheric surface with surface, back 32 in addition, and the front surface 31 of the 3rd lens 30 all is provided with the point of inflexion with surface, back 32;
One aperture 40 places before first lens 10;
One infrared ray filtering optical filter (IR Filter) 50 places after the 3rd lens 30, and it does not influence the focal length of system;
One imaging surface 70 places after the infrared ray filtering optical filter 50.
The equational expression of the second embodiment aspheric curve is as the pattern of first embodiment.
Among second embodiment, the focal length of whole image optics mirror group is f, and the focal length of first lens is f1, and the focal length of second lens is f2, and the focal length of the 3rd lens is f3, and its relation is:
f＝2.98mm；
f/f1＝1.38；
|f/f2|＝0.44；
|f/f3|＝0.01。
Among second embodiment, the first lens abbe number (Abbe Number) is V1, and the second lens abbe number is V2, and its relation is:
V2＝23.4；
V1-V2＝33.1。
Among second embodiment, the focal length of whole image optics mirror group is f, and first lens and the distance of second lens on optical axis are T12, and second lens and the distance of the 3rd lens on optical axis are T23, and its relation is:
T12/f＝0.12；
T23/f＝0.16。
Among second embodiment, the front surface radius-of-curvature of first lens is R1, and the back surface curvature radius of first lens is R2, and its relation is: R1/R2=-0.07.
Among second embodiment, image optics mirror group is provided with a sense electronics optical element in addition and supplies the object imaging, and the optics total length of image optics mirror group is TTL, and the maximum imaging of image optics mirror group highly is ImgH, and its relation is: TTL/ImgH=1.99.
The detailed structured data of second embodiment is as shown in the table 3, and its aspherical surface data is as shown in the table 4, and wherein, the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
Third embodiment of the invention sees also Fig. 5, and the aberration curve of the 3rd embodiment sees also Fig. 6, and the 3rd embodiment is extremely comprised as side by the thing side in regular turn:
The 3rd lens 30 of the negative refracting power of one tool; Its material is a plastic cement, and the front surface 31 of the 3rd lens 30 is a convex surface, and surface, back 32 is a concave surface; The front surface 31 of the 3rd lens 30 all is provided with aspheric surface with surface, back 32 in addition, and the front surface 31 of the 3rd lens 30 all is provided with the point of inflexion with surface, back 32;
One aperture 40 places before first lens 10;
One infrared ray filtering optical filter (IR Filter) 50 places after the 3rd lens 30, and it does not influence the focal length of system;
One imaging surface 70 places after the infrared ray filtering optical filter 50.
The equational expression of the 3rd embodiment aspheric curve is as the pattern of first embodiment.
Among the 3rd embodiment, the focal length of whole image optics mirror group is f, and the focal length of first lens is f1, and the focal length of second lens is f2, and the focal length of the 3rd lens is f3, and its relation is:
f＝5.58mm；
f/f1＝1.47；
|f/f2|＝0.41；
|f/f3|＝0.29。
Among the 3rd embodiment, the first lens abbe number (Abbe Number) is V1, and the second lens abbe number is V2, and its relation is:
V2＝23.4；
V1-V2＝33.1。
Among the 3rd embodiment, the focal length of whole image optics mirror group is f, and first lens and the distance of second lens on optical axis are T12, and second lens and the distance of the 3rd lens on optical axis are T23, and its relation is:
T12/f＝0.10；
T23/f＝0.17。
Among the 3rd embodiment, the front surface radius-of-curvature of first lens is R1, and the back surface curvature radius of first lens is R2, and its relation is: R1/R2=-0.03.
Among the 3rd embodiment, image optics mirror group is provided with a sense electronics optical element in addition and supplies the object imaging, and the optics total length of image optics mirror group is TTL, and the maximum imaging of image optics mirror group highly is ImgH, and its relation is: TTL/ImgH=1.87.
The detailed structured data of the 3rd embodiment is as shown in the table 5, and its aspherical surface data is as shown in the table 6, and wherein, the unit of radius-of-curvature, thickness and focal length is mm, and HFOV is defined as the half the of maximum visual angle.
In the image optics mirror group 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 the image optics mirror group of the present invention,, represent that then this lens surface is a convex surface in paraxial place if lens surface is to be convex surface; If lens surface is to be concave surface, represent that then this lens surface is a concave surface in paraxial place.
State clearly at this in advance; Table 1 to table 6 is depicted as the different numerical value change tables of image optics mirror group embodiment; 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, and table 7 is the numerical data of the corresponding correlate equation of the present invention of each embodiment.
The subordinate list simple declaration:
Table 1 is a first embodiment of the invention structured data table.
Table 2 is first embodiment of the invention aspherical surface data tables.
Table 3 is second embodiment of the invention structured data tables.
Table 4 is second embodiment of the invention aspherical surface data tables.
Table 5 is third embodiment of the invention structured data tables.
Table 6 is third embodiment of the invention aspherical surface data tables.
Table 7 is numerical data tables of the corresponding correlate equation of each embodiment of the present invention.
Main symbol description in the table:
The focal distance f of whole image optics mirror group
The focal distance f 1 of first lens
The focal distance f 2 of second lens
The focal distance f 3 of the 3rd lens
The first lens abbe number V1
The second lens abbe number V2
First lens and second lens on optical axis apart from T12
Second lens and the 3rd lens on optical axis apart from T23
The front surface radius of curvature R 1 of first lens
The back surface curvature radius R 2 of first lens
The optics total length TTL of image optics mirror group
The maximum imaging height ImgH of image optics mirror group
Annotate: surperficial #4 effective aperture size is 1.30mm
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
In sum, the present invention is a kind of image optics mirror group, and mirror group volume can be effectively dwindled in lens arrangement, arrangement mode and eyeglass configuration by this, more can obtain higher resolving power simultaneously.The present invention is not limited to the embodiment that preceding text are discussed.More than the description of embodiment is intended in order to describe and explain the technical scheme that the present invention relates to.Based on the conspicuous conversion of the present invention enlightenment or substitute and also should be considered to fall into protection scope of the present invention.Above embodiment is used for disclosing best implementation method of the present invention, so that those of ordinary skill in the art can use numerous embodiments of the present invention and multiple alternative reaches the object of the invention.
Claims (19)
1. an image optics mirror group is characterized in that, is extremely comprised in regular turn as side by the thing side:
One aperture;
First lens of the positive refracting power of one tool, its front surface are convex surface, and the surface, back is a convex surface;
Second lens of the negative refracting power of one tool, its front surface is a concave surface, and the surface, back is a convex surface, and at least one surface of second lens is provided with aspheric surface, and second lens are plastic cement material; And
The 3rd lens of the negative refracting power of one tool, its front surface is a convex surface, and the surface, back is a concave surface, and at least one surface of the 3rd lens is provided with aspheric surface, and the 3rd lens are plastic cement material; In the image optics mirror group, the number of lenses of tool refracting power is restricted to three; The focal length of whole image optics mirror group is f; The focal length of first lens is f1, and the focal length of second lens is f2, and the focal length of the 3rd lens is f3; The first lens abbe number is V1; The second lens abbe number is V2, and second lens and the distance of the 3rd lens on optical axis are T23, and its relation is: 0.8＜f/f1＜1.8; 0＜| f/f2|＜0.8; 0＜| f/f3|＜0.7; 20＜V1-V2＜38; 0.13＜T23/f＜0.21.
2. image optics mirror group as claimed in claim 1 is characterized in that, the second lens front surface all is provided with aspheric surface with the surface, back, and the 3rd lens front surface all is provided with aspheric surface with the surface, back, and at least one surface of the 3rd lens is provided with the point of inflexion.
3. image optics mirror group as claimed in claim 2 is characterized in that, the first lens front surface all is provided with aspheric surface with the surface, back, and first lens are plastic cement material.
4. image optics mirror group as claimed in claim 1 is characterized in that the focal length of whole image optics mirror group is f, and the focal length of second lens is f2, and the focal length of the 3rd lens is f3, and its relation is: 0.2＜| f/f2|＜0.6; 0＜| f/f3|＜0.4.
5. image optics mirror group as claimed in claim 4; It is characterized in that the focal length of whole image optics mirror group is f, the focal length of first lens is f1; The focal length of the 3rd lens is f3; The front surface radius-of-curvature of first lens is R1, and the back surface curvature radius of first lens is R2, and its relation is: 1.2＜f/f1＜1.6; 0＜| f/f3|＜0.2;-0.8＜R1/R2＜0.
6. image optics mirror group as claimed in claim 3 is characterized in that the focal length of whole image optics mirror group is f, and the focal length of second lens is f2, and its relation is: 0.2＜| f/f2|＜0.6.
7. image optics mirror group as claimed in claim 6 is characterized in that the focal length of whole image optics mirror group is f, and the focal length of first lens is f1, and the focal length of the 3rd lens is f3, and its relation is: 1.2＜f/f1＜1.6; 0＜| f/f3|＜0.4.
8. image optics mirror group as claimed in claim 7 is characterized in that the first lens abbe number is V1, and the second lens abbe number is V2, and its relation is: 28＜V1-V2＜35; V2＜25.
9. image optics mirror group as claimed in claim 8 is characterized in that the focal length of whole image optics mirror group is f; The focal length of the 3rd lens is f3; The front surface radius-of-curvature of first lens is R1, and the back surface curvature radius of first lens is R2, and its relation is: 0＜| f/f3|＜0.2;-0.8＜R1/R2＜0.
10. image optics mirror group as claimed in claim 5; It is characterized in that; First lens and the distance of second lens on optical axis are T12, and second lens and the distance of the 3rd lens on optical axis are T23, and the focal length of whole image optics mirror group is f; The second lens abbe number is V2, and its relation is: 0.08＜T12/f＜0.13; 0.15＜T23/f＜0.18; V2＜25.
11. image optics mirror group as claimed in claim 9; It is characterized in that first lens and the distance of second lens on optical axis are T12, second lens and the distance of the 3rd lens on optical axis are T23; The focal length of whole image optics mirror group is f, and its relation is: 0.08＜T12/f＜0.13; 0.15＜T23/f＜0.18.
12. image optics mirror group as claimed in claim 1; It is characterized in that image optics mirror group is provided with a sense electronics optical element in addition and supplies the object imaging, the optics total length of image optics mirror group is TTL; The maximum imaging of image optics mirror group highly is ImgH, and its relation is: TTL/ImgH＜2.3.
13. an image optics mirror group is characterized in that, is extremely comprised in regular turn as side by the thing side:
One aperture;
First lens of the positive refracting power of one tool, its front surface are convex surface, and the surface, back is a convex surface, and at least one surface of first lens is provided with aspheric surface, and first lens are plastic cement material;
Second lens of the negative refracting power of one tool, its front surface is a concave surface, and the surface, back is a convex surface, and at least one surface of second lens is provided with aspheric surface, and second lens are plastic cement material; And
The 3rd lens of the negative refracting power of one tool, its front surface is a convex surface, and the surface, back is a concave surface, and at least one surface of the 3rd lens is provided with aspheric surface, and the 3rd lens are plastic cement material; In the image optics mirror group, the number of lenses of tool refracting power is restricted to three; The focal length of whole image optics mirror group is f, and the focal length of first lens is f1, and the focal length of the 3rd lens is f3; The first lens abbe number is V1; The second lens abbe number is V2, and first lens and the distance of second lens on optical axis are T12, and its relation is: 0.8＜f/f1＜1.8; 0.14＜| f/f3|＜0.7; 20＜V1-V2＜38; 0.08＜T12/f＜0.13.
14. image optics mirror group as claimed in claim 13 is characterized in that, the second lens front surface all is provided with aspheric surface with the surface, back, and the 3rd lens front surface all is provided with aspheric surface with the surface, back, and at least one surface of the 3rd lens is provided with the point of inflexion.
15. image optics mirror group as claimed in claim 14 is characterized in that, second lens and the distance of the 3rd lens on optical axis are T23, and the focal length of whole image optics mirror group is f, and its relation is: 0＜T23/f＜0.21.
16. image optics mirror group as claimed in claim 15 is characterized in that the focal length of whole image optics mirror group is f, the focal length of first lens is f1, and the focal length of second lens is f2, and its relation is: 1.2＜f/f1＜1.6; 0.2＜| f/f2|＜0.6.
17. image optics mirror group as claimed in claim 16 is characterized in that the first lens abbe number is V1, the second lens abbe number is V2, and its relation is: 28＜V1-V2＜35; V2＜25.
18. image optics mirror group as claimed in claim 17; It is characterized in that; Second lens and the distance of the 3rd lens on optical axis are T23, and the focal length of whole image optics mirror group is f, and the front surface radius-of-curvature of first lens is R1; The back surface curvature radius of first lens is R2, and its relation is: 0.15＜T23/f＜0.18;-0.8＜R1/R2＜0.
19. image optics mirror group as claimed in claim 13; It is characterized in that image optics mirror group is provided with a sense electronics optical element in addition and supplies the object imaging, the optics total length of image optics mirror group is TTL; The maximum imaging of image optics mirror group highly is ImgH, and its relation is: TTL/ImgH＜2.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101685467A CN101995642B (en) | 2009-08-18 | 2009-08-18 | Optical imaging lens group |
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| CN104062747A (en) * | 2014-07-14 | 2014-09-24 | 沈阳敏像科技有限公司 | Three-lens five-mega-pixel front camera of mobile phone |
| TWI557463B (en) * | 2014-12-03 | 2016-11-11 | 先進光電科技股份有限公司 | Optical image capturing system |
| CN114911030A (en) * | 2021-02-09 | 2022-08-16 | 三营超精密光电(晋城)有限公司 | Optical imaging system, image capturing module and electronic device |
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| CN1766690A (en) * | 2004-10-28 | 2006-05-03 | 清华大学 | Minisize camera lens system |
| CN101046543A (en) * | 2006-03-28 | 2007-10-03 | 富士能株式会社 | Imaging lens |
| CN101241225A (en) * | 2007-02-09 | 2008-08-13 | 富士能株式会社 | Imaging lens |
| CN101382641A (en) * | 2007-09-04 | 2009-03-11 | 大立光电股份有限公司 | Thin type image fetching lens assembly |
| US7511899B2 (en) * | 2004-09-28 | 2009-03-31 | Konica Minolta Opto, Inc. | Image pickup optical system and digital apparatus using the same |
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| US7511899B2 (en) * | 2004-09-28 | 2009-03-31 | Konica Minolta Opto, Inc. | Image pickup optical system and digital apparatus using the same |
| CN1766690A (en) * | 2004-10-28 | 2006-05-03 | 清华大学 | Minisize camera lens system |
| CN101046543A (en) * | 2006-03-28 | 2007-10-03 | 富士能株式会社 | Imaging lens |
| CN101241225A (en) * | 2007-02-09 | 2008-08-13 | 富士能株式会社 | Imaging lens |
| CN101382641A (en) * | 2007-09-04 | 2009-03-11 | 大立光电股份有限公司 | Thin type image fetching lens assembly |
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