CN201654312U - High pixel wide-angle pick-up lens - Google Patents

Abstract

The utility model relates to a high pixel wide-angle pick-up lens, which comprises a first lens with negative diopter, a second lens with passive diopter, a third and fourth lens gluing group with passive diopter and a fifth lens with passive or negative diopter sequentially from an object space to an image space along an optic axis. Moreover, the fifth lens adopts a non-spherical lens and meets the following expression: F/F5 is more than or equal to minus 0.1 and less than or equal to 0.2 and G5S2maxSag is more than or equal to 0.3 and less than or equal to 0.9, wherein in the expression, F represents a focal length of the whole system; F5 represents a focal length of the fifth lens; and G5S2maxSag represents a ratio of a caliber of one surface of the fifth lens toward the image space at a surface shape maximum vector height position to an effective all-pass caliber.

Description

High-pixel wide-angle camera

Technical field

The utility model relates to a kind of imaging optical system of camera lens, in particular, relates to a kind of small-sized high-pixel wide-angle camera of being made up of five groups of lens.

Background technology

Camera lens on the digital image product (as video camera, digital camera etc.) can be divided into standard lens, short burnt (wide-angle) camera lens, long burnt (looking in the distance) camera lens three classes by the difference of its focal length or visual field.Usually wide-angle lens just is meant short-focus lens, and general focal length is long more, and the visual angle is just more little, and coverage is just more little; Focal length is short more, and the visual angle is just big more, and coverage is also big more.Use wide-angle lens to enlarge and take the visual field, in the limited distance scope, shoot the photo of panorama or big scene.For example, adopting wide-angle lens in video camera also is all can both take in the Internet video for the client that can will carry out network video, thereby makes the Internet video Communicator can reach real communication effectiveness.

Generally speaking, be used for making that the optical lens of camera lens adopts is the sphere design, just any one tangent plane all is circular.The reason that adopts sphere is easier because add man-hour, but sphere is not best suited for the lens shape of optical imagery, and it can produce many aberrations, and it is burnt to cause image fog to be lost.For overcoming above-mentioned aberration, lens design person must use a lot of sheet lens to compensate in camera lens, thereby causes when image quality improves, and it is not only big but also heavy that camera lens also becomes.

Along with the development of CMOS chip technology, the Pixel Dimensions of chip is more and more littler, the image quality of the optical system that matches is required also more and more higher, but the optical lens size that matches becomes more and more littler; General wide-angle camera, because the characteristics of its big field of view angle and object lens of large relative aperture, size is often long, be difficult to accomplish to mate the requirement of a high pixel sensitive chip simultaneously, it is not enough mainly to show as resolving power, distortion is big and the chief ray shooting angle is big, and this just makes present wide-angle camera generally only be applied to the low low pixel module that requires.

At the problems referred to above, the utility model proposes a kind of brand-new optical lens structure, adopt sphere and aspherical lens combination mode, add specific optical texture design, it is not enough effectively to have solved the resolving power that exists in the present camera lens, the big and big problem of chief ray shooting angle of distortion.

The utility model content

The utility model provides a kind of high resolution, little distortion and chief ray shooting angle little high-quality small size pick-up lens for the defective that overcomes prior art.

In order to realize above-mentioned purpose of the present utility model, the utility model provides a kind of high-pixel wide-angle camera, comprises successively from the object side to the image side along optical axis: have negative dioptric first lens; Second lens with positive diopter; The the 3rd, the 4th lens glue with positive diopter is set up jointly; Have dioptric the 5th lens of plus or minus; In addition, described the 5th lens adopt non-spherical lens, and satisfy following expression formula:

-0.1≤F/F5≤0.2

0.3≤G5S2maxSag≤0.9

In the formula, F represents the focal length of total system;

F5 represents the focal length of the 5th lens;

G5S2maxSag represents the ratio of the 5th lens towards the effective relatively all-pass light bore of bore of the position, the maximum rise place of face shape of picture side's one side.

In addition, preferred construction is,

Described first lens are the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side;

Described second lens are the male and fomale(M﹠F) lens, and concave surface is towards object space, and convex surface is towards picture side;

Described the 3rd lens are biconvex lens;

Described the 4th lens are the male and fomale(M﹠F) lens, and concave surface is towards picture side, and convex surface is towards object space;

Described the 5th lens are the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side.

In addition, another kind of preferred construction is,

Described first lens are the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side;

Described second lens are the male and fomale(M﹠F) lens, and concave surface is towards object space, and convex surface is towards picture side;

Described the 3rd lens are biconvex lens;

Described the 4th lens are biconcave lens;

Described the 5th lens are the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side.

Further, preferred construction is that described first lens are non-spherical lens.And described second lens are sphere or non-spherical lens, and in addition, described the 3rd lens and the 4th lens are spherical lens.

Further, the stop position of described pick-up lens is in the middle of first lens and second lens.

Further, preferred construction is, also is provided with optical filter, and described optical filter is between the 5th lens and the imaging plane.

In addition, preferred construction is that described the 5th lens satisfy following expression:

-0.1≤F/F5≤0.1

In the formula, F represents the focal length of total system;

F5 represents the focal length of the 5th lens.

In addition, preferred construction is that described first lens satisfy following expression formula:

-0.7≤F/F1≤-0.01

In the formula, F represents the focal length of total system;

F1 represents the focal length of first lens.

Further, preferred construction is that described second lens satisfy following expression formula:

0.35≤F/F2≤0.75

1≤G2R1/G2R2≤3

In the formula, F represents the focal length of total system;

F2 represents the focal length of second lens;

G2R1 represents the radius-of-curvature towards the object space one side of second lens;

G2R2 represents the radius-of-curvature towards picture side's one side of second lens.

In addition, preferred construction is,

Described non-spherical lens is the high order aspheric surface lens, and satisfies following expression formula:

$Z\left(h\right)=\frac{{\mathrm{<figure-callout\; id="2"\; label="ch"\; filenames="HSA00000021659700031.png"\; state="\{\{state\}\}">ch</figure-callout>}}^2}{1+\sqrt{1-(1+k)c^2{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HSA00000021659700031.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}}+{\mathrm{<figure-callout\; id="4"\; label="Ah"\; filenames="HSA00000021659700011.png"\; state="\{\{state\}\}">Ah</figure-callout>}}^4+{\mathrm{<figure-callout\; id="6"\; label="Bh"\; filenames="HSA00000021659700011.png,HSA00000021659700031.png"\; state="\{\{state\}\}">Bh</figure-callout>}}^6+{\mathrm{Ch}}^8+{\mathrm{Dh}}^{10}+{\mathrm{Eh}}^{12}+{\mathrm{<figure-callout\; id="14"\; label="Fh"\; filenames="HSA00000021659700032.png"\; state="\{\{state\}\}">Fh</figure-callout>}}^{14}+{\mathrm{Gh}}^{16}$

In the formula, Z is an aspheric surface along optical axis direction highly for the position of h the time, apart from the aspheric surface summit apart from rise Sag, c=1/r, r represent the radius-of-curvature of minute surface, k is circular cone coefficient conic, A, B, C, D, E, F, G are the high order aspheric surface coefficient.

The utility model high-pixel wide-angle camera, because the mode that has adopted sphere and aspherical lens to combine, improved the resolving power of whole set of shots, distortion and chief ray shooting angle have been reduced, taken into full account the property taken into account of field angle and picture element, guaranteed that camera lens has good image quality under situation with great visual angle, obtained better technical effect, simultaneously, reasonably focal power is distributed, make the entire length and the maximum image planes diameter of a circle ratio of camera lens be less than 2, be specially adapted to occasions such as network shooting.

Description of drawings

By the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the utility model will become apparent and understand easily.

Fig. 1 is the concrete structure synoptic diagram of the related high-pixel wide-angle camera of an expression embodiment of the present utility model;

Fig. 2 is that the axle of the related high-pixel wide-angle camera of an expression embodiment of the present utility model is gone up chromaticity difference diagram;

Fig. 3 is the astigmatism figure of the related high-pixel wide-angle camera of an expression embodiment of the present utility model;

Fig. 4 is the distortion figure of the related high-pixel wide-angle camera of an expression embodiment of the present utility model;

Fig. 5 is the ratio chromatism, figure of the related high-pixel wide-angle camera of an expression embodiment of the present utility model;

Fig. 6 is the concrete structure synoptic diagram of the related high-pixel wide-angle camera of an expression embodiment of the present utility model.

Embodiment

Below, be described with reference to the accompanying drawings the embodiment that the utility model relates to.

(first embodiment)

Fig. 1 is the concrete structure synoptic diagram of the related high-pixel wide-angle camera of an expression embodiment of the present utility model; as shown in Figure 1; in a specific embodiment; described high-pixel wide-angle camera lens comprises five groups of lens and diaphragm; object space is positioned at the left side of five groups of lens; the image aspect is in the right side of five groups of lens; and; be arranged in order from the object side to the image side according to optical axis and be the negative dioptric first lens E1; the second lens E2 of positive diopter; the lens glue that the 3rd lens E3 of one positive diopter and the 4th lens E4 constitute is set up jointly; the 5th lens E5; in addition, also be provided with optical filter E6 and chip cover glass E7 in the back of the 5th lens E5.

And described diaphragm E8 is positioned in the middle of the first lens E1 and the second lens E2.The said lens system is when carrying out work, and through five groups of lens E1, E2, E3, E4, E5, the imaging plane picture place in chip cover glass E7 back behind final mating plate E6 after filtration and the chip cover glass E7 forms image from the light of object space.

Further be described with reference to 1 pair of described high-pixel wide-angle camera of figure, in one embodiment, the described first lens E1 is the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side; The described second lens E2 is the male and fomale(M﹠F) lens, and concave surface is towards object space, and convex surface is towards picture side; Described the 3rd lens E3 is a biconvex lens; Described the 4th lens E4 is the male and female face lens, and concave surface is towards picture side, and convex surface is towards object space; Described the 5th lens E5 is the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side, and described the 4th lens E4 is the falcate shape.

Described high-pixel wide-angle camera lens is described in further detail, in order to reach the resolving power that improves whole set of shots, the mode that described high-pixel wide-angle camera has adopted spherical lens and non-spherical lens to combine.Among the embodiment, described first lens E1 and the 5th lens E5 are chosen as non-spherical lens, and the second lens E2 also is chosen as non-spherical lens, and described the 3rd lens E3 and the 4th lens E4 are the sphere cemented doublet.

Certainly, the described second lens E2 also can adopt spherical lens.

The characteristics of non-spherical lens are: is continually varying from the lens center to peripheral curvature.Different with the spherical lens that certain curvature is arranged from the lens center to the periphery, non-spherical lens has better radius-of-curvature characteristic, has to improve the advantage of distorting aberration and improving astigmatic image error, can make the visual field become bigger and true.After adopting non-spherical lens, can eliminate the aberration that in imaging, occurs as much as possible, thereby improve image quality.

In one embodiment,, improve the imaging effect of whole set of shots, need carry out specific design described the 5th lens E5 for distortion and the chief ray shooting angle that reaches the reduction system better.Preferred described non-spherical lens E5 satisfies following expression formula:

-0.1≤F/F5≤0.2

0.3≤G5S2maxSag≤0.9

In the formula, F represents the focal length of total system;

F5 represents the focal length of the 5th lens;

G5S2maxSag represents the ratio of the 5th lens towards the effective relatively all-pass light bore of bore of the position, the maximum rise place of face shape of picture side's one side.

In the described high-pixel wide-angle camera, light respectively by first lens, second lens, the 3rd, the 4th lens, finally by the 5th lens E5 and enter into imaging plane.Because described the 5th lens have adopted non-spherical lens, therefore, can adjust the image that chief ray forms preferably on imaging plane.

In addition, at the defective of the image deformation that exists in the existing wide-angle camera, the shape of described the 5th lens has been done certain improvement, makes distortion reduce to minimum degree.Because the shape of non-spherical lens can limit with G5S2maxSag, therefore, among the embodiment, its scope is 0.3≤G5S2maxSag≤0.9, in the formula, G5S2maxSag represents the ratio of the 5th lens towards the effective relatively all-pass light bore of bore of the position, the maximum rise place of face shape of picture side's one side.

In addition, among the embodiment, the numerical range of the F/F5 of described the 5th lens E5 is :-0.1≤F/F5≤0.2, and F represents the focal length of total system, F5 represents the focal length of the 5th lens.

Further in the preferred embodiment, the numerical range of the F/F5 of described the 5th lens E5 is :-0.1≤F/F5≤0.1, and F represents the focal length of total system, F5 represents the focal length of the 5th lens.

After satisfying above-mentioned two expression formulas, can clearly reduce the distortion of described high-pixel wide-angle camera system and the shooting angle of chief ray.

In one embodiment, described the 5th lens E5 is that two aspheric surfaces are formed, and described aspheric outward appearance presents the profile of undaform.

In addition, among the embodiment, the non-spherical lens that adopts in described high-pixel wide-angle camera is chosen as the high order aspheric surface lens, and the aspheric surface of described non-spherical lens need satisfy following expression formula:

$Z\left(h\right)=\frac{{\mathrm{<figure-callout\; id="2"\; label="ch"\; filenames="HSA00000021659700031.png"\; state="\{\{state\}\}">ch</figure-callout>}}^2}{1+\sqrt{1-(1+k)c^2{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HSA00000021659700031.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}}+{\mathrm{<figure-callout\; id="4"\; label="Ah"\; filenames="HSA00000021659700011.png"\; state="\{\{state\}\}">Ah</figure-callout>}}^4+{\mathrm{<figure-callout\; id="6"\; label="Bh"\; filenames="HSA00000021659700011.png,HSA00000021659700031.png"\; state="\{\{state\}\}">Bh</figure-callout>}}^6+{\mathrm{Ch}}^8+{\mathrm{Dh}}^{10}+{\mathrm{Eh}}^{12}+{\mathrm{<figure-callout\; id="14"\; label="Fh"\; filenames="HSA00000021659700032.png"\; state="\{\{state\}\}">Fh</figure-callout>}}^{14}+{\mathrm{Gh}}^{16}$

In the formula, Z is an aspheric surface along optical axis direction highly for the position of h the time, apart from the aspheric surface summit apart from rise Sag, c=1/r, r represent the radius-of-curvature of minute surface, k is circular cone coefficient conic, A, B, C, D, E, F, G are the high order aspheric surface coefficient.

In addition, thinner for pick-up lens can be accomplished in one embodiment, F/F1 is within certain scope in control, and preferably its ratio is:

-0.7≤F/F1≤-0.01

In the formula, F represents the focal length of total system; F1 represents the focal length of first lens; Meeting this formula, to make camera lens to accomplish thinner.

In order to reach the purpose of correction system spherical aberration better, in an embodiment, G2R1/G2R2 is in certain numerical range in control, and preferably its ratio is:

0.35≤F/F2≤0.75

1≤G2R1/G2R2≤3

In the formula, F represents the focal length of total system; F2 represents the focal length of second lens; G2R1 represents the radius-of-curvature towards the object space one side of second lens; G2R2 represents the radius-of-curvature towards picture side's one side of second lens.

With the Numerical Control of G2R1/G2R2, F/F2 within above-mentioned scope, can the correction system spherical aberration, simultaneously, the described second lens E2 cooperates the first lens E1 and diaphragm E8, can reduce system's coma better, finally improve the imaging effect of described high-pixel wide-angle camera.

Be described with further reference to chart, what table 1, table 2 were listed is the correlation parameter of all lens of an embodiment of the present utility model, the radius-of-curvature and the diameter that comprise lens face also have the center thickness, space interval of each lens, the refractive index and the Abbe number of the optical material of order successively from the object side to the image side.

Parallel along optical axis from object space one side; with each eyeglass number consecutively, the minute surface of the first lens E1 is S1, S2, and the diaphragm face is S3; the minute surface of the second lens E2 is S4, S5; the minute surface of the 3rd lens E3 is S6, S7, because the 3rd lens E3 and the 4th lens E4 are glued together, therefore the minute surface of the 4th lens E4 is S7, S8; the minute surface of the 5th lens E5 is S9, S10; the minute surface of optical filter E6 is S11, S12, and the minute surface of chip cover glass E7 is S13, S14, and S15 is an imaging plane.

Systematic parameter: 1/2.5 " the inch photoreceptor, f-number FNO 2.8,

Table 1

The face sequence number

Surface type

Radius-of-curvature

Thickness

Material

Effective diameter

The circular cone coefficient

Object plane

Sphere

Infinite

Infinite

Infinite

S1

Aspheric surface

0.0384

1.0030

1.544/ 56.1

5.20

0

S2

Aspheric surface

0.0724

1.2916

4.00

0

S3 (diaphragm)

Sphere

Infinite

0.2947

1.66

S4	Aspheric surface	-0.1957	3.2900	1.544/ 56.1	2.50	3.2812
							S5	Aspheric surface	-0.3038	0.1001		4.76	0.1816
S6	Sphere	0.0557	2.5400	1.804/ 46.6	5.70
							S7	Sphere	-0.2909	0.4000	1.847/ 23.8	5.70
S8	Sphere	-0.0434	0.5153		6.60
							S9	Aspheric surface	0.3319	1.6200	1.544/ 56.1	6.40	-4.9121
S10	Aspheric surface	0.3811	0.6000		7.20	-2.5145
							S11	Sphere	0.5935	0.5000	1.517/ 64.2	8.00
S12	Sphere	Infinite	1.4505		8.00
							S13	Sphere	Infinite	0.5000	1.517/ 64.2	8.00
S14	Sphere	Infinite	0.0500		8.00
							S15	Sphere	Infinite			7.24

Following table is aspheric surface high-order term coefficient A, B, C, D, E, F, the G of non-spherical lens: table 2

In addition, Fig. 2 to Fig. 5 is the optical performance curve figure corresponding to specific embodiment.Wherein, Fig. 2 is that the axle of the related high-pixel wide-angle camera of an expression embodiment of the present utility model is gone up chromaticity difference diagram, and the meeting focus point of the light of its expression different wave length after via optical system departs from, and unit is mm;

Fig. 3 is the astigmatism curve map of the related high-pixel wide-angle camera of an expression embodiment of the present utility model, the crooked and sagittal image surface bending of its expression meridianal image surface, and unit is mm;

Fig. 4 is the distortion figure of the related high-pixel wide-angle camera of an expression embodiment of the present utility model, the distortion sizes values under the expression different visual angles situation, and unit is %;

Fig. 5 is the ratio chromatism, figure of the related high-pixel wide-angle camera of an expression embodiment of the present utility model, the light of its expression different wave length via optical system after the deviation of different image heights on imaging plane, unit is μ m.

Data from above-mentioned optical performance curve figure can be analyzed discovery, and than traditional pick-up lens structure, the utility model pick-up lens has optical effect preferably.

(second embodiment)

Below in conjunction with accompanying drawing another kind of specific embodiment of the present utility model is described.

Fig. 6 has disclosed the structural representation of the specific embodiment of another kind of lens, and than first specific embodiment, in the present embodiment, described the 4th lens E4 ' is chosen as biconcave lens.

As shown in Figure 6; described high-pixel wide-angle camera lens is made of five groups of lens; object space is positioned at the left side of five groups of lens; the image aspect is in the right side of five groups of lens; according to optical axis from the object side to the image side successively by the negative dioptric first lens E1 '; the second lens E2 ' of positive diopter; the 3rd lens E3 ' of positive diopter; the 4th lens E4 ' gummed group; the 5th lens E5 ' and optical filter E6 ' and chip cover glass E7 ' composition; and the light of working as object space is through five groups of lens; promptly become image in that picture is square behind optical filter and the chip cover glass, and the diopter of described the 5th lens E5 ' can be for positive; also can be for negative.

And described diaphragm E8 ' is positioned in the middle of the first lens E1 and the second lens E2.

Further describe the utility model, with reference to Fig. 6, the described first lens E1 ' is chosen as the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side; The described second lens E2 ' is the male and fomale(M﹠F) lens, and concave surface is towards object space, and convex surface is towards picture side; Described the 3rd lens E3 ' is a biconvex lens; Different with the foregoing description, in this specific embodiment, described the 4th lens E4 ' is a biconcave lens, and described the 5th lens E5 ' is the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side; The stop position of this camera lens is between the first lens E1 ' and the second lens E2 ', and, the first lens E1 ' and the 5th lens E2 ' are non-spherical lens, and the second lens E2 ' is a non-spherical lens, and described the 3rd lens E3 ' and the 4th lens E4 ' are the sphere cemented doublet.Certainly, the second lens E2 ' can be chosen as spherical lens too.

The aspheric surface of described the 5th lens is two, wherein, an aspheric surface outward appearance undulate, another aspheric surface presents slightly flat shape.

In addition, described non-spherical lens is chosen as the high order aspheric surface lens, and described aspheric surface need satisfy following formula:

$Z\left(h\right)=\frac{{\mathrm{<figure-callout\; id="2"\; label="ch"\; filenames="HSA00000021659700031.png"\; state="\{\{state\}\}">ch</figure-callout>}}^2}{1+\sqrt{1-(1+k)c^2{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HSA00000021659700031.png"\; state="\{\{state\}\}">h</figure-callout>}}^2}}+{\mathrm{<figure-callout\; id="4"\; label="Ah"\; filenames="HSA00000021659700011.png"\; state="\{\{state\}\}">Ah</figure-callout>}}^4+{\mathrm{<figure-callout\; id="6"\; label="Bh"\; filenames="HSA00000021659700011.png,HSA00000021659700031.png"\; state="\{\{state\}\}">Bh</figure-callout>}}^6+{\mathrm{Ch}}^8+{\mathrm{Dh}}^{10}+{\mathrm{Eh}}^{12}+{\mathrm{<figure-callout\; id="14"\; label="Fh"\; filenames="HSA00000021659700032.png"\; state="\{\{state\}\}">Fh</figure-callout>}}^{14}+{\mathrm{Gh}}^{16}$

In the formula, Z is an aspheric surface along optical axis direction highly for the position of h the time, apart from the aspheric surface summit apart from rise Sag, c=1/r, r represent the radius-of-curvature of minute surface, k is circular cone coefficient conic, A, B, C, D, E, F, G are the high order aspheric surface coefficient.

For distortion and the chief ray shooting angle that reaches the reduction system better, in the present embodiment, described the 5th lens satisfy following expression formula:

-0.1≤F/F5≤0.2

0.3≤G5S2maxSag≤0.9

In the formula, F represents the focal length of total system; F5 represents the focal length of the 5th lens E5 '; G5S2maxSag represents the ratio of the 5th lens E5 ' towards the effective relatively all-pass light bore of bore of the position, the maximum rise place of face shape of picture side's one side.

And further in the preferred embodiment, the numerical range of the F/F5 of described the 5th lens E5 ' is :-0.1≤F/F5≤0.1, and F represents the focal length of total system, F5 represents the focal length of the 5th lens.

In addition, among the embodiment, thinner in order to make that camera lens can be done, the F/F1 scope of the described first lens E1 ' satisfies following expression formula:

-0.7≤F/F1≤-0.01

In the formula, F represents the focal length of total system; F1 represents the focal length of the first lens E1 '.

And among the embodiment, in order to reach the purpose of correction system spherical aberration better, the described second lens E2 ' satisfies following expression:

0.35≤F/F2≤0.75

1≤G2R1/G2R2≤3

In the formula, F represents the focal length of total system; F2 represents the focal length of the second lens E2 '; G2R1 represents the radius-of-curvature towards the object space one side of second lens; G2R2 represents the radius-of-curvature towards picture side one side of second lens, and the scope of G2R1/G2R2, F/F2 is controlled within the above-mentioned scope, can the correction system spherical aberration, cooperate the first lens E1 ' and diaphragm E8 ' position, and can reduce system's coma.

Be described with further reference to chart, what table 3, table 4 were listed is the correlation parameter of all lens of an embodiment of the present utility model, the radius-of-curvature and the diameter that comprise lens face also have the center thickness, space interval of each lens, the refractive index and the Abbe number of the optical material of order successively from the object side to the image side.

Parallel along optical axis from object space one side; with each eyeglass number consecutively; the minute surface of the first lens E1 ' is S1 '; S2 '; the diaphragm face is S3 '; the minute surface of the second lens E2 ' is S4 '; S5 '; the minute surface of the 3rd lens E3 ' is S6 '; S7 '; because the 3rd lens E3 ' is glued together with the 4th lens E4 '; therefore the minute surface of the 4th lens E4 ' is S7 '; S8 '; the minute surface of the 5th lens E5 ' is S9 '; S10 '; the minute surface of optical filter E6 ' is S11 '; S12 ', the minute surface of chip cover glass E7 is S13 '; S14 ', S15 ' are imaging plane.

Systematic parameter: 1/2.5 " inch photoreceptor, f-number FNO2.8, table 3

The face sequence number	Surface type	Radius-of-curvature	Thickness	Material	Effective diameter	The circular cone coefficient
							Object plane	Sphere	Infinite	Infinite		Infinite
S1′	Aspheric surface	0.038	0.5493	1.544/ 56.1	3.8	153.8306
							S2′	Aspheric surface	0.1964	1.0872		2.9	10.894
S3 ' (diaphragm)	Sphere	0	0.1016		1.83
							S4′	Aspheric surface	-0.1688	3.3086	1.544/ 56.1	2	12.815
S5′	Aspheric surface	-0.3373	0.2987		4.6	0.1447
							S6′	Sphere	0.1696	2.6789	1.804/ 46.6	5.8
S7′	Sphere	-0.2454	0.4493	1.806/ 25.4	5.8

S8′	Sphere	0.1351	1.5863		4.8
							S9′	Aspheric surface	0.1372	2.0939	1.544/ 56.1	4.8	-0.3195
S10′	Aspheric surface	0.1071	0.1		6.5	-65.3931
							S11′	Sphere	Infinite	0.5	1.517/ 64.2	7.2
S12′	Sphere	Infinite	0.95		7.2
							S13′	Sphere	Infinite	0.5	1.517/ 64.2	7.2
S14′	Sphere	Infinite	0.0524		7.2
							S15′	Sphere	Infinite			7.13

Following table is aspheric surface high-order term coefficient A, B, C, D, E, F, the G of non-spherical lens: table 4

The utility model high-pixel wide-angle camera lens owing to taked above-mentioned structural design, is being used for 1/2.5 " sensitive chip the time, visual angle, high resolution have all had and have improved largely; Considering the chief ray angle matchings of electron device when accepting sensitization such as CCD or CMOS, the chief ray incident angle has also had bigger reduction, has solved the problem of picture color difference and the homogeneity of relative brightness.Camera design than traditional possesses preferable optical property.

It should be noted that, concrete parameter in the above table only is exemplary, and the value of each lens composition radius-of-curvature, face interval and refractive index etc. are not limited to the shown value by above-mentioned each numerical value embodiment, other value can be adopted, the similar techniques effect can be reached.

Though described principle of the present utility model and embodiment at the high-pixel wide-angle camera lens above; but; under above-mentioned instruction of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improvement or distortion drop in the protection domain of the present utility model.It will be understood by those skilled in the art that top specific descriptions just in order to explain the purpose of this utility model, are not to be used to limit the utility model.Protection domain of the present utility model is limited by claim and equivalent thereof.

Claims (10)

1. high-pixel wide-angle camera comprises from the object side to the image side successively along optical axis:

Have negative dioptric first lens;

Second lens with positive diopter;

The the 3rd, the 4th lens glue with positive diopter is set up jointly;

Have dioptric the 5th lens of plus or minus; In addition,

Described the 5th lens adopt non-spherical lens, and satisfy following expression formula:

-0.1≤F/F5≤0.2

0.3≤G5S2maxSag≤0.9

In the formula, F represents the focal length of total system;

F5 represents the focal length of the 5th lens;

G5S2maxSag represents the ratio of the 5th lens towards the effective relatively all-pass light bore of bore of the position, the maximum rise place of face shape of picture side's one side.

2. high-pixel wide-angle camera lens according to claim 1 is characterized in that,

Described first lens are the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side;

Described second lens are the male and fomale(M﹠F) lens, and concave surface is towards object space, and convex surface is towards picture side;

Described the 3rd lens are biconvex lens;

Described the 4th lens are the male and fomale(M﹠F) lens, and concave surface is towards picture side, and convex surface is towards object space;

Described the 5th lens are the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side.

3. high-pixel wide-angle camera lens according to claim 1 is characterized in that,

Described first lens are the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side;

Described second lens are the male and fomale(M﹠F) lens, and concave surface is towards object space, and convex surface is towards picture side;

Described the 3rd lens are biconvex lens;

Described the 4th lens are biconcave lens;

Described the 5th lens are the male and female face lens, and convex surface is towards object space, and concave surface is towards picture side.

4. high-pixel wide-angle camera according to claim 1 is characterized in that,

Described first lens are non-spherical lens, and described second lens are sphere or non-spherical lens,

Described the 3rd lens and the 4th lens are spherical lens.

5. high-pixel wide-angle camera according to claim 1 is characterized in that,

The diaphragm of described pick-up lens is between first lens and second lens.

6. high-pixel wide-angle camera according to claim 1 is characterized in that,

Also be provided with optical filter, described optical filter is between the 5th lens and the imaging plane.

7. according to claim 1,2,3 arbitrary described high-pixel wide-angle cameras, it is characterized in that,

Described the 5th lens are described to satisfy following expression formula:

-0.1≤F/F5≤0.1

In the formula, F represents the focal length of total system;

F5 represents the focal length of the 5th lens.

8. according to claim 1,2,3 arbitrary described high-pixel wide-angle cameras, it is characterized in that,

Described first lens satisfy following expression formula:

-0.7≤F/F1≤-0.01

In the formula, F represents the focal length of total system;

F1 represents the focal length of first lens.

9. according to claim 1,2,3 arbitrary described high-pixel wide-angle cameras, it is characterized in that,

Described second lens satisfy following expression formula:

0.35≤F/F2≤0.75

1≤G2R1/G2R2≤3

In the formula, F represents the focal length of total system;

F2 represents the focal length of second lens;

G2R1 represents the radius-of-curvature towards the object space one side of second lens;

G2R2 represents the radius-of-curvature towards picture side's one side of second lens.

10. according to claim 1 or 4 described high-pixel wide-angle cameras, it is characterized in that described non-spherical lens is the high order aspheric surface lens, and satisfy following expression formula:

$Z\left(h\right)=\frac{{\mathrm{ch}}^2}{1+\sqrt{1-(1+k)c^2{h}^2}}+{\mathrm{Ah}}^4+{\mathrm{Bh}}^6+{\mathrm{Ch}}^8+{\mathrm{Dh}}^{10}+{\mathrm{Eh}}^{12}+{\mathrm{Fh}}^{14}+{\mathrm{Gh}}^{16}$

In the formula, Z is an aspheric surface along optical axis direction highly for the position of h the time, apart from the aspheric surface summit apart from rise Sag, c=1/r, r represent the radius-of-curvature of minute surface, k is circular cone coefficient conic, A, B, C, D, E, F, G are the high order aspheric surface coefficient.

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