CN114556181A - Imaging Lenses, Camera Modules, and Imaging Devices - Google Patents

Abstract

The imaging lens (21) includes: a front-group optical system (31) provided on the object side; and a rear-group optical system (32) provided on the imaging surface side, wherein the front-group optical system (31) includes an optical system having a negative refractive power At least one lens and at least one lens with positive refractive power, the rear group optical system (32) includes an aperture stop (4) and at least one lens with negative refractive power, and is located closest to the object in the front group optical system (31) The lens on the side is a lens having a negative refractive power and serving as a lens protection filter, and has an aspherical shape with an inflection point on the surface on the imaging surface side of the lens closest to the imaging surface side in the rear group optical system (32).

Description

Imaging Lenses, Camera Modules, and Imaging Devices

technical field

The present disclosure relates to an imaging lens, a camera module, and an imaging apparatus, and more particularly, to an imaging lens, a camera module, and an imaging apparatus that are small and capable of achieving good optical performance.

Background technique

Generally, an optical system consisting of (in order from the object side) a front-group optical system having a negative refractive power and a rear-group optical system having a positive refractive power are well known for applications such as in-vehicle cameras, surveillance cameras, video cameras, and electronics An imaging optical system of an imaging device of a still camera.

In recent years, portable imaging devices such as cell phones and digital cameras have been widely used. With the recent miniaturization of the imaging apparatus, the imaging lens mounted on the imaging apparatus also needs to be miniaturized.

Therefore, in order to mount a wide-angle lens, which is an example of an imaging lens, on a small digital device such as a mobile phone or an action camera, further downsizing is required. In addition, since the resolution of the imaging element mounted on the imaging device is also increasing, the optical characteristics of the imaging lens mounted on the imaging device also need to be improved to accommodate the higher resolution of the imaging element.

However, a compact wide-angle lens whose back focal length is sufficiently shortened and provides excellent optical characteristics has not been effectively proposed.

SUMMARY OF THE INVENTION

The present disclosure aims to solve at least one of the above-mentioned technical problems. Therefore, the present disclosure needs to provide an imaging lens, a camera module, and an imaging apparatus.

According to the present disclosure, the imaging lens includes:

a front optical system disposed on the object side; and

The rear-group optical system provided on the imaging surface side, wherein

The front group optical system includes at least one lens with negative refractive power and at least one lens with positive refractive power,

The rear group optical system includes an aperture stop and at least one lens having negative refractive power,

the lens located closest to the object side in the front-group optical system is the lens having negative refractive power and serving as a lens protection filter, and

The lens positioned closest to the imaging surface side in the rear group optical system has an aspherical shape with an inflection point on the surface on the imaging surface side.

In one example, the imaging lens may satisfy the following conditional expression,

0.5<(r11+r12)/(r11-r12)<2.5,

Here, r11 is the central radius of curvature of the object-side surface of the lens located closest to the object side, and r12 is the central radius of curvature of the imaging surface-side surface of the lens located closest to the object side.

In one example, the imaging lens may satisfy the following conditional expression,

∑d/f<8.0,

where Σd is the distance on the optical axis from the vertex of the object-side surface of the lens located closest to the object side to the imaging surface, and f is the focal length of the entire optical system.

In one example, the imaging lens may satisfy the following conditional expression:

0.5<fs/f<13,

where fs is the composite focal length of the rear optical system, and f is the focal length of the entire optical system.

In one example, the lens on the side closest to the imaging surface may be a lens with negative refractive power.

In one example, the surface on the imaging surface side of the lens located closest to the imaging surface side may have a concave shape in the vicinity of the optical axis and a convex shape in a peripheral portion.

In one example, the viewing angle of the imaging lens may be 100 degrees or more.

In one example, the lens on the side closest to the imaging surface may be made of plastic.

According to the present disclosure, the camera module includes:

imaging lenses; and

An image sensor including an imaging surface.

According to the present disclosure, an imaging device includes a camera module.

Description of drawings

The foregoing and other aspects and advantages of embodiments of the present application will become more apparent and more understandable from the following detailed description, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a configuration diagram of a camera module according to a first example of the present disclosure;

2 is an aberration diagram of a camera module according to a first example of the present disclosure;

3 is a configuration diagram of a camera module according to a second example of the present disclosure;

4 is an aberration diagram of a camera module according to a second example of the present disclosure;

5 is a configuration diagram of a camera module according to a third example of the present disclosure;

6 is an aberration diagram of a camera module according to a third example of the present disclosure;

7 is a configuration diagram of a camera module according to a fourth example of the present disclosure;

8 is an aberration diagram of a camera module according to a fourth example of the present disclosure;

FIG. 9 is a configuration diagram of a camera module according to a fifth example of the present disclosure; and

FIG. 10 is an aberration diagram of a camera module according to a fifth example of the present disclosure.

Detailed ways

Embodiments of the present disclosure will now be described in detail and examples of the embodiments will be illustrated in the accompanying drawings. Throughout the specification, the same or similar elements and elements having the same or similar functions are denoted by the same reference numerals. The embodiments described in the present disclosure with reference to the figures are illustrative and intended to explain the present disclosure and should not be construed to limit the present disclosure.

【Disclosure Summary】

First, the outline of the present disclosure will be described. The camera module applied in the present disclosure is configured as shown in FIGS. 1 , 3 , 5 , 7 and 9 . In the figure, the dashed-dotted line represents the optical axis of the camera module.

The camera module 11 includes an imaging lens 21 , an optical filter 22 and an image sensor 23 .

The imaging lens 21 is, for example, an ultra-wide-angle lens having an angle of 100 degrees or more. The imaging lens 21 includes a front-group optical system 31 and a rear-group optical system 32 . The front-group optical system 31 is an optical system whose position is fixed in the housing of the camera module 11 . The rear-group optical system 32 is an optical system that can be moved in the optical axis direction by an actuator in the housing of the camera module 11 . The rear optical system 32 can be used for a focusing operation in which the imaging lens 21 is focused on a subject.

In the imaging lens 21, the front group optical system 31 and the rear group optical system 32 are sequentially arranged from the object side to the imaging surface S side.

The front-group optical system 31 includes at least one lens having negative refractive power and at least one lens having positive refractive power. The rear group optical system 32 includes the aperture stop 4 and at least one lens having negative refractive power. That is, the aperture stop 4 is provided in the rear-group optical system 32, and can be moved in the optical axis direction together with the lenses in the rear-group optical system 32 by a focusing operation.

The image sensor 23 is, for example, a solid-state image sensor such as a Complementary Metal Oxide Semiconductor (CMOS) or a Charge Coupled Device (CCD). The image sensor 23 has an imaging surface S, which is an imaging surface of the imaging lens 21 . The image sensor 23 receives light incident from an object (object side) via the imaging lens 21 and the filter 22, photoelectrically converts the light, and outputs image data obtained by photoelectric conversion of the light to a subsequent stage.

In order to obtain a compact camera module of an imaging lens having good optical performance, it is preferable, for example, to properly correct the chromatic aberration of the imaging lens and shorten the back focal length of the imaging lens.

Therefore, in the camera module 11, the front-group optical system 31 includes at least one lens with negative refractive power and at least one lens with positive refractive power, the rear-group optical system 32 includes at least one lens with negative refractive power, and the rear-group optical system includes at least one lens with negative refractive power and at least one lens with positive refractive power. The lens on the side closest to the imaging surface S in the system 32 has an aspherical shape with an inflection point on the surface on the imaging surface S side.

As described above, since the front group optical system 31 includes at least one lens having negative refractive power and at least one lens having positive refractive power, chromatic aberration can be properly corrected and good optical performance can be obtained. Furthermore, light can be sharply refracted, and the total optical length can be shortened even when the viewing angle is wide.

Further, in the camera module 11, since the rear group optical system 32 includes at least one lens having negative refractive power, and the lens located on the side closest to the imaging surface S in the rear group optical system 32 has a presence on the surface on the imaging surface S side The aspherical shape of the inflection point makes it possible to make a part of the rear optical system 32 have a large negative refractive power to shorten the back focus of the imaging lens 21 . In particular, if the lens located on the side closest to the imaging surface S in the rear group optical system 32 has a negative refractive power, that is, a negative refractive power in the vicinity of the optical axis, it is suitable to shorten the back focus.

Further, the lens located on the side closest to the imaging surface S in this rear group optical system 32 has an aspherical shape having an inflection point near the lens edge on the surface on the imaging surface S side. Specifically, the surface on the side of the imaging surface S of the lens located on the side closest to the imaging surface S in the rear group optical system 32 is concave at the center of the lens (ie, near the optical axis), and is concave at the peripheral portion (ie, near the outer peripheral portion) Convex.

In the front-group optical system 31, the lens positioned closest to the object side is a lens that functions as a lens protection filter. Such a lens can be realized, for example, by making a transparent cover in the shape of a lens, which is located on the housing of the camera module 11 on the optical axis, so as to cover the inside of the housing.

Here, in a conventional camera module in which a glass cover (ie, a transparent cover) is provided on the object side of the imaging lens, "vignetting" may occur, in which light from the object is incident on the periphery of the imaging lens at a large angle of incidence The light from the side is blocked by the glass cover or the lens barrel. Therefore, in conventional camera modules, it has been difficult to achieve a sufficiently wide angle. In contrast, according to the camera module 11 of the present disclosure, by including a lens serving as a lens protection filter instead of a conventional glass cover, a sufficiently wide-angle lens that sufficiently suppresses "vignetting" can be realized. Furthermore, the camera module 11 miniaturizes the imaging lens 21 while maintaining good optical performance of the imaging lens 21 by satisfying the following formula (1).

0.5<(r11+r12)/(r11-r12)<2.5,

In formula (1), r11 is the center curvature radius of the object-side surface of the lens located closest to the object side in the front group optical system 31 , and r12 is the imaging surface S of the lens located closest to the object side in the front group optical system 31 The radius of curvature of the center of the side surface.

As the ratio shown in the formula (1) decreases, the imaging lens 21 can be more reliably miniaturized while maintaining good optical performance of the imaging lens 21 .

Furthermore, when the camera module 11 satisfies the following formula (2), the imaging lens 21 can be further miniaturized.

Σd/f<8.0 (2)

In formula (2), Σd is the full length of the imaging lens 21, that is, the distance on the optical axis from the vertex of the object-side surface of the lens located closest to the object side to the imaging surface S; f is the total length of the optical system Focal length (the same applies below).

As the ratio of the full length Σd to the focal length f shown in the formula (2) decreases, the imaging lens 21 becomes smaller. In particular, when the ratio of the full length Σd to the focal length f is less than 8, a sufficiently small imaging lens 21 can be obtained.

For example, if the focal length f is a fixed value, the overall length Σd of the imaging lens 21 becomes shorter as the ratio of the overall length Σd to the focal length f becomes smaller. Further, if the back focal length of the imaging lens 21 is shortened, the overall length Σd of the imaging lens 21 is shortened accordingly.

More preferably, the ratio of the full length Σd to the focal length f satisfies the following formula (2)'

Σd/f<7.0 (2)’

Furthermore, when the camera module 11 satisfies the following formula (3), the imaging lens 21 can be more reliably miniaturized and good optical performance can be maintained.

0.5<fs/f<13 (3)

In the formula (3), fs is the combined focal length of the rear group optical system 32 (the same applies hereinafter).

If the value of fs/f is lower than the lower limit value (ie, 0.5) of the formula (3), the sensitivity of the eccentricity error of the rear group optical system 32 becomes very high, and the manufacturing difficulty becomes high. On the other hand, if the value of fs/f exceeds the upper limit value of formula (3) (ie, 13), spherical aberration is overcorrected and it is difficult to maintain optical performance.

Furthermore, in consideration of lens molding, it is preferable that the aspherical lens in the imaging lens 21, particularly the aspherical lens having an aspherical shape having an inflection point, is made of a plastic material (glass material). In addition, among the lenses constituting the imaging lens 21, a lens having a size equal to or smaller than a certain size may be a lens made of a plastic material, and a lens larger than a certain size may be a lens made of a glass material, since a lens different from a plastic material is used. The glass material is difficult to form aspherical or smaller lenses.

If the above conditions are satisfied, the imaging lens 21 having a small size and sufficient optical performance can be obtained even when the viewing angle is 100 degrees or more.

In particular, the lens located on the side closest to the imaging surface S in the rear group optical system 32 has an aspherical shape with an inflection point on the surface on the imaging surface S side, while balancing the difference between the front group optical system 31 and the rear group optical system 32 color difference between. Therefore, the back focal length can be further shortened, and the imaging lens 21 having a small size and good optical performance can be obtained.

Such a camera module 11 including an imaging lens 21 is suitable for small digital devices (imaging devices) such as mobile phones, wearable cameras, and surveillance cameras.

<Configuration example of camera module>

Next, a more specific example to which the embodiment of the present disclosure is applied will be described. In the following examples, "Si" represents the ordinal number of the i-th surface sequentially increasing from the object side to the imaging surface S side. The optical elements of the corresponding surfaces are shown with the corresponding surface number "Si". The symbol "first surface" or "first surface" represents the surface on the object side of the lens, and "second surface" or "second surface" represents the surface on the imaging surface S side of the lens. "Ri" represents the center radius of curvature (mm) of the i-th surface. In "Ri", "E+i" represents a base 10 exponential expression, that is, "10 ⁱ ". For example, "1.00E+18" means "1.00×10 ¹⁸ ". This exponential expression also applies to the aspheric coefficients described later. "Di" represents the value of the distance (mm) on the optical axis between the ith surface and the (i+1)th surface, and "Ndi" represents the material of the optical element with the ith surface at the d-line (wavelength 587.6 nm), "νdi" represents the value of the Abbe number at the d-line of the material of the optical element having the i-th surface, "Fno" represents the F number, and "2ω" represents the viewing angle.

The imaging lens 21 used in the following example includes a lens having an aspherical surface. The aspherical shape of the lens is defined by the following formula (4).

Z=C·h ² /{1+(1-K·C ² ·h ² ) ^1/2 }+ΣAn·h ⁿ (4)

(n=integer greater than 3)

In equation (4), Z is the depth of the aspheric surface, C is the paraxial curvature equal to 1/R, h is the distance from the optical axis to the lens surface, K is the eccentricity (second-order aspheric coefficient), and An is the nth degree aspheric coefficient.

【First example】

A first example of applying specific numerical values to the camera module 11 shown in FIG. 1 will be described.

In the first example, the front group optical system 31 includes a first lens L1 having a negative refractive power and a concave surface facing the imaging surface S side, and a second lens L2 in this order from the object side toward the imaging surface S side, The second lens L2 has positive refractive power and has a convex surface facing the object side. The rear group optical system 32 includes, in order from the object side toward the imaging surface S side: a third lens L3 having a positive refractive power and a convex surface facing the object side and the imaging surface S side, a third lens L3 having a negative refractive power and a concave surface facing the object side and the imaging surface Fourth lens L4 on the S side, fifth lens L5 with positive refractive power and convex surface facing imaging surface S side, sixth lens L6 with positive refractive power and convex surface facing imaging surface S side, negative refractive power and concave surface facing imaging The seventh lens on the surface S side. In the rear group optical system 32, the apex of the aperture stop 4 is arranged on the imaging surface S side with respect to the first surface of the third lens L3 and is arranged on the object side with respect to the second surface of the third lens L3.

Table 1 shows the lens data of the first example, Table 2 shows the refractive power of the lens, and Table 3 shows the focal length f of the entire system, the F-number Fno, the angle of view 2ω, the total length, and the composite focal length of the rear optical system 32 : fs, (r11+r12)/(r11-r12), Σd/f, and fs/f, Table 4 shows the values of the aspheric coefficients of the imaging lens 21 .

Table 1

Si Ri Di Nd vd 1 (virtual surface) 1.00E+10 2 (L1 first surface) 1.00E+18 0.8100 1.5168 64.17 3 (L1 second surface) 1.3957 0.7385 4 (L2 first surface) 3.6633 1.0328 1.6349 23.96 5 (L2 second surface) 34.3633 0.5736 6 (Aperture diaphragm) 1.00E+18 -0.0100 7 (L3 first surface) 2.4710 0.9338 1.5432 56.00 8 (L3 second surface) -1.5661 0.0500 9 (L4 first surface) -4.7636 0.4000 1.6349 23.96 10 (L4 second surface) 3.1443 0.1552 11 (L5 first surface) 10.8615 0.7688 1.5432 56.00 12 (L5 second surface) -2.6963 0.1628 13 (L6 first surface) -1.9168 0.7839 1.5432 56.00 14 (L6 second surface) -0.7828 0.0535 15 (L7 first surface) 2.2485 0.4451 1.6349 23.96 16 (L7 second surface) 0.7358 0.5362 17 (filter) 1.00E+18 0.2100 1.5168 64.17 18 (imaging plane) 0.3558

Table 2

lens Refractive power L1 burden L2 just L3 just L4 burden L5 just L6 just L7 burden

table 3

f 1.7633 Fno 2.4096 2ω 134.5 full length 8.0000 fs 2.1499 (r11+r12)/(r11-r12) 1.0000 ∑d/f 4.5369 fs/f 1.2192

Table 4

S2 S3 S4 K 0.000000000000000E+00 -1.012501537660640E+00 1.203393953043420E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 0.000000000000000E+00 -1.191809661148940E-04 9.194115328094040E-03 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 0.000000000000000E+00 -1.710298521836980E-03 6.628229388505000E-03 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 0.000000000000000E+00 -3.614183486638790E-04 -7.144379659603080E-04 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 0.000000000000000E+00 5.864051093151640E-05 5.788753364429910E-04 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S5 S7 S8 K 1.000000000000000E+01 2.439128869964770E+00 1.800512114568970E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 7.788734065215300E-02 1.676160386925670E-02 1.500707416392360E-02 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 8.441841482710490E-03 -6.775748684994800E-02 1.293193718606950E-03 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 1.210329809815730E-02 7.367534493416550E-02 -1.845550221189860E-02 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 8.335233446088110E-03 -3.546996938787340E-01 -1.604438435718350E-01 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 1.622344000000000E-01 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S9 S10 S11 K 1.235805071546160E+01 -1.000000000000000E+01 -1.000000000000000E+01 A3 -2.110697495798610E-02 -6.198890211338680E-02 -5.657553791149140E-02 A4 -9.519965855572380E-02 -1.968134082620840E-02 -5.645721070471630E-02 A5 -7.825415425777500E-02 6.036913445024880E-03 -3.074369757849220E-02 A6 7.869985989247040E-02 5.713651107190250E-02 8.095324548105090E-02 A7 4.167773345417170E-02 3.201938002470340E-02 1.633421009151880E-03 A8 -1.527940311714350E-01 -6.402508202763690E-02 -1.741448567536110E-02 A9 -9.959773473014410E-02 -2.418114333612840E-02 -1.615219566983570E-03 A10 -3.455744301658520E-03 4.033684266077380E-02 2.055871576705730E-02 A11 -3.320849891719550E-02 0.000000000000000E+00 -1.623605703072490E-02 A12 6.991250560839450E-02 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S12 S13 S14 K -1.000000000000790E+01 -1.000000000000000E+01 -4.357809389322020E+00 A3 1.117174005817750E-02 -1.584106341445840E-02 3.260019396775830E-02 A4 -1.194409357342880E-01 6.192576287395290E-02 -7.960773082394200E-02 A5 6.198916292620920E-02 -7.422525864565310E-02 8.282516510424040E-02 A6 -1.171820783922330E-02 7.253485272396800E-02 1.697078518648840E-02 A7 -1.787486663869950E-02 1.772257788643560E-02 -1.530972748398100E-02 A8 1.774201257664140E-02 -2.356072450348600E-02 -6.860776672520920E-03 A9 1.925366973382810E-02 -1.805153082511750E-02 1.111640337541160E-05 A10 8.957593242999670E-03 3.653028868858120E-03 1.296485236573290E-05 A11 -8.357770584206050E-03 5.008894534010320E-03 5.468205596116780E-04 A12 -1.262825690260780E-02 -7.308291257157480E-04 2.145181042673630E-05 A13 -1.899646822614490E-02 2.177777165660760E-05 1.948049188958220E-05 A14 9.437956800853720E-03 1.266680289992500E-05 4.791200558704900E-06 A15 2.045361312069030E-02 2.593761783766950E-05 1.456151923350300E-06 A16 -1.075229043971080E-02 1.712589353776240E-05 8.773892693587690E-08 A17 0.000000000000000E+00 9.468283603197430E-06 -2.024887670161480E-07 A18 0.000000000000000E+00 -3.960985380132090E-07 -2.979841524075600E-07 A19 0.000000000000000E+00 -4.707079628314520E-06 -1.675385520399170E-07 A20 0.000000000000000E+00 -4.698311433170090E-06 -1.201437081712660E-07

S15 S16 K -8.834872000000000E-01 -6.285399300000000E+00 A3 9.820800000000000E-03 5.328640000000000E-02 A4 -7.358360000000000E-02 -5.860240000000000E-02 A5 -3.251000000000000E-03 8.639100000000000E-03 A6 1.219390000000000E-02 -1.440100000000000E-03 A7 -1.347000000000000E-03 2.054500000000000E-03 A8 -3.882000000000000E-04 -5.841000000000000E-04 A9 -6.252548600000000E-05 1.751848800000000E-05 A10 -2.679676400000000E-05 2.213117700000000E-05 A11 1.582728100000000E-05 -1.403615500000000E-05 A12 1.770422400000000E-05 -4.012046700000000E-06 A13 -2.572107800000000E-06 -1.182130000000000E-06 A14 -1.011506400000000E-06 4.302953300000000E-08 A15 0.000000000000000E+00 5.512435900000000E-07 A16 0.000000000000000E+00 3.627674100000000E-07 A17 0.000000000000000E+00 -9.826418100000000E-08 A18 0.000000000000000E+00 -3.229425600000000E-08 A19 0.000000000000000E+00 -1.594033800000000E-10 A20 0.000000000000000E+00 1.984375800000000E-09

The aberrations in the first example are shown in Figure 2. FIG. 2 shows spherical aberration, astigmatism (field curvature) and distortion as examples of aberrations. Each of these aberration diagrams shows aberrations with the d-line (587.56 nm) as the reference wavelength. In the spherical aberration diagram, aberrations with respect to the g-line (435.84 nm) and the C-line (656.27 nm) are also shown. In the diagrams showing astigmatism, "S" represents the aberration value on the sagittal image plane, and "T" represents the aberration value on the meridional image plane. The same applies to the aberration maps in the other examples.

It can be seen from the above aberration diagrams that, although the camera module 11 of the first example is small in size and wide in angle, it can satisfactorily correct various aberrations to obtain excellent optical performance.

【Second example】

A second example of applying specific numerical values to the camera module 11 shown in FIG. 3 will be described below. Similar to the first example, in the second example, the front-group optical system 31 includes a first lens L1 and a second lens L2, and the rear-group optical system 32 includes third to seventh lenses L3-L7. The aperture stop 4 is provided in the rear group optical system 32 . Table 5 shows the lens data of the second example, Table 6 shows the refractive power of the lens, and Table 7 shows the focal length f of the entire system, the F-number Fno, the angle of view 2ω, the total length, and the composition of the rear optical system 32 The values of the focal length: fs, (r11+r12)/(r11−r12), Σd/f, and fs/f, and Table 8 shows the values of the aspheric coefficients of the imaging lens 21 .

table 5

Si Ri Di Nd Vd 1 (virtual surface) 1.00E+10 2 (L1 first surface) 200.0000 0.8100 1.5432 56.00 3 (L1 second surface) 1.3369 0.9399 4 (L2 first surface) 3.5154 0.8629 1.6349 23.96 5 (L2 second surface) -30.9997 0.6054 6 (Aperture diaphragm) 1.00E+18 -0.0100 7 (L3 first surface) 2.9116 0.8477 1.5432 56.00 8 (L3 second surface) -1.5726 0.0500 9 (L4 first surface) -4.8077 0.4000 1.6349 23.96 10 (L4 second surface) 2.6616 0.0984 11 (L5 first surface) 9.7336 0.8245 1.5432 56.00 12 (L5 second surface) -2.7523 0.0721 13 (L6 first surface) -2.3204 0.7361 1.5432 56.00 14 (L6 second surface) -0.8630 0.0281 15 (L7 first surface) 2.1433 0.4161 1.6349 23.96 16 (L7 second surface) 0.7938 0.5248 17 (filter) 1.00E+18 0.2100 1.5168 64.17 18 (imaging plane) 0.5841

Table 6

lens Refractive power L1 burden L2 just L3 just L4 burden L5 just L6 just L7 burden

Table 7

f 1.7391 Fno 2.4671 2ω 152.8 full length 8.0000 fs 2.3273 (r11+r12)/(r11-r12) 1.0135 ∑d/f 4.6001 fs/f 1.3382

Table 8

S2 S3 S4 K -1.000000000000020E+01 -9.987051762007530E-01 -1.810347167663190E-01 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 -1.265100000000000E-03 5.387877036173740E-04 -4.683292799167170E-03 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 9.068344000000050E-05 -1.512073383112840E-03 4.939922383529630E-03 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 -1.298880400000000E-06 -3.600234640035140E-04 1.823407650884590E-04 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 -2.078328100000000E-07 3.372268145761420E-05 -5.567404504155170E-05 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S5 S7 S8 K 1.000000000000000E+01 2.181361098608220E-01 1.933430954770980E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 2.849758097041470E-02 6.412483773901190E-05 3.531744355812450E-02 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 2.950938850760680E-03 -1.199458139688920E-01 -4.247372529259700E-02 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 2.666417364582160E-03 2.267292782103920E-01 -4.429017804155380E-02 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 -1.494900759737030E-03 -6.207692860959110E-01 -9.947573013291400E-02 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 1.622344000000000E-01 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S9 S10 S11 K 1.735941871422080E+01 -1.000000000000000E+01 -1.000000000000000E+01 A3 -1.172349574819490E-02 -3.628369260200860E-02 -1.145940697867070E-02 A4 -1.100952085076980E-01 -2.229494838671710E-02 -2.684318656654830E-02 A5 -6.095351307723470E-02 -6.607074119237070E-03 -2.601970547733150E-02 A6 9.440974122098410E-02 5.288936158498220E-02 7.127502362350360E-02 A7 3.952186377818000E-02 3.412611813344530E-02 -1.212657597239370E-02 A8 -1.659356801226240E-01 -6.157349608933860E-02 -2.903434251215050E-02 A9 -1.095548797123990E-01 -2.482564976183630E-02 -6.846020521203180E-03 A10 7.654842209376670E-03 3.657363155874460E-02 2.489236685239480E-02 A11 1.891869528574020E-03 0.000000000000000E+00 -9.079889311319630E-04 A12 1.182107497927120E-01 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S12 S13 S14 K -1.000000000000790E+01 -1.000000000000000E+01 -5.031468391393800E+00 A3 2.986295641753160E-02 -2.083717942592840E-02 1.646308894326660E-02 A4 -1.248460171048860E-01 5.832567434664610E-02 -6.246799245757300E-02 A5 6.301225073671200E-02 -7.807893574147230E-02 8.448121750248510E-02 A6 -1.247746081635200E-02 7.232934570546320E-02 1.717756148459940E-02 A7 -1.980083715195850E-02 1.824706173521460E-02 -1.520306699942680E-02 A8 1.652512750038330E-02 -2.288559315627660E-02 -6.833345444643280E-03 A9 1.902157245377290E-02 -1.751481437111840E-02 -1.301040781858700E-05 A10 9.274099674804160E-03 3.876264557570060E-03 -1.920506132890850E-05 A11 -7.858195744863730E-03 5.098107880944090E-03 5.197509814183390E-04 A12 -1.217097767295380E-02 -6.958503025787910E-04 6.748702304300810E-06 A13 -1.867185505284270E-02 3.008077332157400E-06 1.465203625339120E-05 A14 9.629563397444840E-03 -1.970283906325950E-05 3.158191623617830E-06 A15 2.053254669058340E-02 -1.233177357859090E-05 1.172459095782470E-06 A16 -1.075551675041170E-02 -8.867078453820570E-06 3.595663900245830E-07 A17 0.000000000000000E+00 -7.056445097495670E-06 -1.718810815493640E-08 A18 0.000000000000000E+00 -4.647908562054580E-06 -1.764905568833210E-07 A19 0.000000000000000E+00 -3.353193999579260E-06 -1.808735592760380E-07 A20 0.000000000000000E+00 -4.488361548859220E-07 -1.508941530043910E-07

S15 S16 K -8.834872000000000E-01 -6.285399300000000E+00 A3 9.820800000000000E-03 5.328640000000000E-02 A4 -7.358360000000000E-02 -5.860240000000000E-02 A5 -3.251000000000000E-03 8.639100000000000E-03 A6 1.219390000000000E-02 -1.440100000000000E-03 A7 -1.347000000000000E-03 2.054500000000000E-03 A8 -3.882000000000000E-04 -5.841000000000000E-04 A9 -6.252548600000000E-05 1.751848800000000E-05 A10 -2.679676400000000E-05 2.213117700000000E-05 A11 1.582728100000000E-05 -1.403615500000000E-05 A12 1.770422400000000E-05 -4.012046700000000E-06 A13 -2.572107800000000E-06 -1.182130000000000E-06 A14 -1.011506400000000E-06 4.302953300000000E-08 A15 0.000000000000000E+00 5.512435900000000E-07 A16 0.000000000000000E+00 3.627674100000000E-07 A17 0.000000000000000E+00 -9.826418100000000E-08 A18 0.000000000000000E+00 -3.229425600000000E-08 A19 0.000000000000000E+00 -1.594033800000000E-10 A20 0.000000000000000E+00 1.984375800000000E-09

Fig. 4 shows the aberrations of the second example, and it can be seen from the aberration diagram in Fig. 4 that it is obvious that the camera module 11 in the second example can satisfactorily correct various kinds of Aberrations for excellent optical performance.

【Third example】

Next, a third example of applying a specific numerical value to the camera module 11 shown in FIG. 5 will be described. Similar to the first example, in the third example, the front-group optical system 31 includes the first lens L1 and the second lens L2, the rear-group optical system 32 includes the third to seventh lenses L3 to L7, and the aperture stop 4 is provided in the rear optical system 32 . Table 9 shows the lens data of the third example, Table 10 shows the refractive power of the lens, and Table 11 shows the focal length f of the entire system, the F-number Fno, the angle of view 2ω, the total length, and the composition of the rear optical system 32 The values of the focal length: fs, (r11+r12)/(r11−r12), Σd/f, and fs/f, and Table 12 shows the values of the aspheric coefficients of the imaging lens 21 .

Table 9

Si Ri Di Nd vd 1 (virtual surface) 1.00E+10 2 (L1 first surface) 1.00E+18 0.8100 1.5168 64.17 3 (L1 second surface) 1.4608 0.7000 4 (L2 first surface) 7.4359 1.0442 1.6349 23.96 5 (L2 second surface) -9.7263 0.7582 6 (Aperture diaphragm) 1.00E+18 -0.0100 7 (L3 first surface) 2.5840 0.7855 1.5432 56.00 8 (L3 second surface) -1.5985 0.0500 9 (L4 first surface) -6.8911 0.4000 1.6349 23.96 10 (L4 second surface) 2.6658 0.1020 11 (L5 first surface) 14.2870 0.8209 1.5432 56.00 12 (L5 second surface) -3.4351 0.2458 13 (L6 first surface) -2.2906 0.7666 1.5432 56.00 14 (L6 second surface) -0.7168 0.0824 15 (L7 first surface) 2.2625 0.3318 1.6349 23.96 16 (L7 second surface) 0.7139 0.5468 17 (filter) 1.00E+18 0.2100 1.5168 64.17 18 (imaging plane) 0.3558

Table 10

lens Refractive power L1 burden L2 just L3 just L4 burden L5 just L6 just L7 burden

Table 11

f 1.7051 Fno 2.4503 2ω 139.9 full length 8.0000 fs 2.2206 (r11+r12)/(r11-r12) 1.0000 Σd/f 4.6918 fs/f 1.3023

Table 12

S2 S3 S4 K 0.000000000000000E+00 -9.987051762007530E-01 4.199652943679350E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 0.000000000000000E+00 -6.775244006667290E-03 6.225363011475080E-03 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 0.000000000000000E+00 8.191482965943620E-03 1.218006643866610E-02 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 0.000000000000000E+00 2.546725802021560E-04 -3.056086050344570E-03 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 0.000000000000000E+00 -1.667558116032510E-05 7.082429216938740E-04 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0..000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S5 S7 S8 K 1.000000000000000E+01 1.884400737132740E+00 2.173566726400200E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 5.482480686933470E-02 1.513061547638730E-02 5.129993579371380E-02 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 1.800107728488830E-03 -9.092959531537660E-02 4.159214833536760E-03 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 -3.307790673938390E-04 1.560012776823340E-01 -4.467796588132900E-02 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 3.564209668342730E-03 -5.428872673855240E-01 -1.806756839662530E-01 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 1.622344000000000E-01 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S9 S10 S11 K 3.111473620099250E+01 -1.000000000000000E+01 -1.000000000000000E+01 A3 -1.474565283699130E-02 -3.820984136151940E-02 -3.063510403293590E-02 A4 -1.174832774742140E-01 -3.843794639326330E-02 -2.747090022535640E-02 A5 -1.050616519951570E-01 -6.947162129160420E-04 -7.543194263113860E-03 A6 9.221816378258350E-02 5.617034913669580E-02 7.935290493498800E-02 A7 8.239321861278590E-02 3.153051761555040E-02 -1.884426033238850E-02 A8 -1.272253841691310E-01 -6.446396824213750E-02 -3.722326689921730E-02 A9 -1.180500347012580E-01 -2.230516954755450E-02 -8.252928316009740E-03 A10 -6.535883062423920E-02 4.543085901118990E-02 2.954959491917840E-02 A11 -8.557199599632920E-02 0.000000000000000E+00 9.796516469956890E-04 A12 1.874481674338920E-01 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S12 S13 S14 K -1.000000000000790E+01 -1.000000000000000E+01 -4.362570161870050E+00 A3 1.864541606229270E-02 -3.063247347262900E-02 8.020560054324150E-03 A4 -1.599812211326580E-01 -9.267624930143530E-03 -1.096379662827960E-01 A5 4.618194548765310E-02 -1.204155787240050E-01 9.363461511404540E-02 A6 -1.371015517554340E-02 6.210635535376790E-02 1.917226448577780E-02 A7 -1.912972156193710E-02 2.176829004554870E-02 -1.550007872091320E-02 A8 1.487260539017920E-02 -1.763460955454930E-02 -7.088094437826010E-03 A9 1.760862664377530E-02 -1.423361871041640E-02 1.690298306652310E-04 A10 9.561918998001320E-03 5.277563471693940E-03 2.236621451919460E-04 A11 -5.985501202412620E-03 5.453117229392870E-03 6.750533921663290E-04 A12 -9.809611672113080E-03 -6.629504659024480E-04 7.324478351651410E-05 A13 -1.670901957220780E-02 -3.366150144373060E-05 3.143366651949920E-05 A14 1.068441007743250E-02 1.403910757306360E-05 -3.109707958197410E-06 A15 2.055083161927990E-02 6.888558300854190E-05 -9.716194861441510E-06 A16 -1.165712903791430E-02 7.658305888938510E-05 -7.701177463697320E-06 A17 0.000000000000000E+00 6.250165568064580E-05 -4.110999911275400E-06 A18 0.000000000000000E+00 3.867365584335990E-05 -1.729145059073790E-06 A19 0.000000000000000E+00 9.972338244125130E-06 2.187700273159080E-08 A20 0.000000000000000E+00 -5.753180121468890E-06 6.792280235990370E-07

S15 S16 K -8.834872000000000E-01 -6.285399300000000E+00 A3 9.820800000000000E-03 5.328640000000000E-02 A4 -7.358360000000000E-02 -5.860240000000000E-02 A5 -3.251000000000000E-03 8.639100000000000E-03 A6 1.219390000000000E-02 -1.440100000000000E-03 A7 -1.347000000000000E-03 2.054500000000000E-03 A8 -3.882000000000000E-04 -5.841000000000000E-04 A9 -6.252548600000000E-05 1.751848800000000E-05 A10 -2.679676400000000E-05 2.213117700000000E-05 A11 1.582728100000000E-05 -1.403615500000000E-05 A12 1.770422400000000E-05 -4.012046700000000E-06 A13 -2.572107800000000E-06 -1.182130000000000E-06 A14 -1.011506400000000E-06 4.302953300000000E-08 A15 0.000000000000000E+00 5.512435900000000E-07 A16 0.000000000000000E+00 3.627674100000000E-07 A17 0.000000000000000E+00 -9.826418100000000E-08 A18 0.000000000000000E+00 -3.229425600000000E-08 A19 0.000000000000000E+00 -1.594033800000000E-10 A20 0.000000000000000E+00 1.984375800000000E-09

FIG. 6 shows the aberrations in the third embodiment, and it can be seen from the aberration diagram in FIG. 6 that it is obvious that the camera module 11 in the third example can satisfactorily correct various aberrations to obtain excellent optical performance.

【Fourth example】

Next, a fourth example of applying a specific numerical value to the camera module 11 shown in FIG. 7 will be described. In the fourth example, the lens configurations of the front-group optical system 31 and the rear-group optical system 32 are different from those of the first to third examples.

Specifically, in the fourth example, the front-group optical system 31 includes, in order from the object side to the imaging surface S side: a first lens L1 having a negative refractive power and a concave surface facing the imaging surface S side, a first lens L1 having a negative refractive power and a concave surface A second lens L2 facing the imaging surface S side, and a third lens L3 having a positive refractive power and a concave surface facing the object side and the imaging surface S side. The rear group optical system 32 includes, in order from the object side to the imaging surface S side: a fourth lens L4 having a positive refractive power and a convex surface facing the object side and the imaging surface S side, a fourth lens L4 having a negative refractive power and a concave surface facing the object side and the imaging surface A fifth lens L5 on the S side, a sixth lens L6 having a negative refractive power, and a seventh lens L7 having a negative refractive power and a concave surface facing the imaging surface S side. In the rear group optical system 32, the apex of the aperture stop 4 is provided on the imaging surface S side with respect to the first surface of the fourth lens L4 and is provided on the object side with respect to the second surface of the fourth lens L4.

Table 13 shows the lens data of the fourth example, Table 14 shows the refractive power of the lens, and Table 15 shows the focal length f of the entire system, the F-number Fno, the angle of view 2ω, the total length, and the composition of the rear optical system 32 Focal lengths: fs, (r11+r12)/(r11−r12), Σd/f, and fs/f, Table 16 shows the values of the aspheric coefficients of the imaging lens 21 .

Table 13

Si Ri Di Nd vd 1 (virtual surface) 1.00E+10 2 (L1 first surface) 1.30E+01 0.9 1.6230 58.12 3 (L1 second surface) 2.6999 0.9000 4 (L2 first surface) 14.3736 0.6857 1.4875 70.44 5 (L2 second surface) 1.3000 1.2167 6 (L3 first surface) 1.78E+00 0.81142 1.5339 56.20 7 (L3 second surface) -3.2356 0.30904 8 (aperture diaphragm) 1.00E+18 -0.02000 9 (L4 first surface) 3.2981 0.73671 1.5339 56.20 10 (L4 second surface) -1.0766 0.02500 11 (L5 first surface) -4.4521 0.31000 1.6349 23.96 12 (L5 second surface) 1.5298 0.64434 13 (L6 first surface) 0.4228 0.40000 1.5339 56.20 14 (L6 second surface) 0.2390 0.02000 15 (L7 first surface) 2.7389 0.43383 1.5339 56.20 16 (L7 second surface) 2.2888 0.19702 17 (filter) 1.00E+18 0.11000 1.5168 64.20 18 (imaging plane) 0.52001

Table 14

lens Refractive power L1 burden L2 burden L3 just L4 just L5 burden L6 burden L7 burden

Table 15

f 1.2459 Fno 2.4641 2ω 162.3 full length 8.1998 fs 14.7895 (r11+r12)/(r11-r12) 1.5242 ∑d/f 6.5814 fs/f 11.8705

Table 16

S2 S3 S4 K 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S5 S6 S7 K 0.000000000000000E+00 -1.426481064242960E+00 2.095643952175020E-01 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 0.000000000000000E+00 -3.337807762826210E-02 -2.391996513233170E-02 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 0.000000000000000E+00 -3.737386170189720E-02 -1.423384822146510E-02 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 0.000000000000000E+00 -1.478213990929630E-03 -8.198738231112180E-04 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S9 S10 S11 K -5.691672939788710E-01 7.210931921912800E-01 9.142186923193580E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 2.065362247078310E-02 1.727867197121430E-01 -4.762506755360050E-01 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 -1.962622513023300E-01 -5.378791228539060E-01 -5.876572145765700E-02 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 5.265467778821660E-01 9.210164417228350E-01 -2.302874374257640E-01 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 -2.286588477863880E+00 -9.429417398754750E-01 -3.194843581301680E-01 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S12 S13 S14 K -1.006492142865310E+01 -1.540968466521260E+17 -1.079243904282780E+26 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 -5.945668779424970E-02 2.637651500025180E-02 1.338005000827000E-02 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 9.145971217176000E-02 -3.281330270372640E-03 -4.834522326318170E-03 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 -5.526303975745670E-02 2.077765534975260E-04 2.395452689482560E-03 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 2.101584828356210E-02 -6.414535996826710E-04 -7.806689841526270E-04 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S15 S16 K -7.095558900653710E-01 -6.263943977104570E+00 A3 0.000000000000000E+00 0.000000000000000E+00 A4 -9.257499482769730E-02 -4.578304703307770E-02 A5 0.000000000000000E+00 0.000000000000000E+00 A6 2.830589870653260E-02 1.051903083757810E-02 A7 0.000000000000000E+00 0.000000000000000E+00 A8 -6.144583013171090E-03 -1.750102812379610E-03 A9 0.000000000000000E+00 0.000000000000000E+00 A10 4.664394523847530E-04 9.076048657977360E-06 A11 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00

The aberration of the fourth example is shown in FIG. 8 . From the aberration diagram of FIG. 8 , it can be seen that although the camera module 11 of the fourth example is small in size and wide in angle, it can still satisfactorily correct various aberrations to Obtain excellent optical properties.

【Fifth example】

Next, a fifth example of applying a specific numerical value to the camera module 11 shown in FIG. 9 will be described. In the fifth example, the lens configurations of the front-group optical system 31 and the rear-group optical system 32 are different from those in the first to fourth examples.

Specifically, in the fifth example, the front-group optical system 31 includes, in order from the object side to the imaging surface S side: a first lens L1 having a negative refractive power and a concave surface facing the imaging surface S side, a first lens L1 having a positive refractive power and a convex surface A second lens L2 facing the imaging surface S side, and a third lens L3 having a positive refractive power and a convex surface facing the object side. The rear group optical system 32 includes, in order from the object side to the imaging surface 3 side: a fourth lens L4 having a positive refractive power whose convex surface faces the object side and the imaging surface S side, a fourth lens L4 having a negative refractive power and a concave surface facing the imaging surface S side The fifth lens L5, the sixth lens L6 having positive refractive power and the convex surface facing the imaging surface S side, and the seventh lens L7 having negative refractive power and the concave surface facing the imaging surface S side, in the rear group optical system 32, the aperture light The apex of the stop 4 is provided on the imaging surface S side with respect to the first surface of the fourth lens L4 and is provided on the object side with respect to the second surface of the fourth lens L4.

Table 17 shows the lens data of the fifth example, Table 18 shows the refractive power of the lens, and Table 19 shows the focal length f of the entire system, the F-number Fno, the angle of view 2ω, the total length, and the composition of the rear group optical system 32 Focal lengths: fs, (r11+r12)/(r11−r12), Σd/f, and fs/f, Table 20 shows the values of the aspheric coefficients of the imaging lens 21 .

Table 17

Si Ri Di Nd Vd 1 (virtual surface) 1.00E+10 2 (L1 first surface) 25.0000 0.6000 1.6469 58.44 3 (L1 second surface) 1.7562 1.7070 4 (L2 first surface) -3.5331 1.4403 1.5343 55.66 5 (L2 second surface) -1.9876 0.1199 6 (L3 first surface) 2.1443 0.6038 1.6107 35.51 7 (L3 second surface) 1.9526 0.4473 8 (aperture diaphragm) 1.00E+18 -0.0200 9 (L4 first surface) 1.5751 0.6000 1.5343 55.66 10 (L4 second surface) -1.5003 0.0300 11 (L5 first surface) 68.2455 0.3000 1.6424 18.95 12 (L5 second surface) 1.4505 0.2273 13 (L6 first surface) 25.2715 0.5138 1.5343 55.66 14 (L6 second surface) -1.8793 0.2516 15 (L7 first surface) -5.1799 0.4500 1.5343 55.66 16 (L7 second surface) 2.4773 0.0434 17 (filter) 1.00E+18 0.1100 1.5168 64.20 18 (imaging plane) 0.5779

Table 18

lens Refractive power L1 burden L2 just L3 just L4 just L5 burden L6 just L7 burden

Table 19

f 1.3274 Fno 2.5055 2ω 164.6 full length 8.0024 fs 2.5128 (r11+r12)/(r11-r12) 1.1511 ∑d/f 6.0286 fs/f 1.8930

Table 20

S2 S3 S4 K 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 0.000000000000000E+00 0.000000000000000E+00 -1.911043408074790E-02 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 0.000000000000000E+00 0.000000000000000E+00 6.119848829947400E-03 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 0.000000000000000E+00 0.000000000000000E+00 -1.728623233355910E-03 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S5 S6 S7 K 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 5.018413608393540E-02 -1.749565752561040E-02 -1.130559914396980E-01 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 -1.327355983745440E-02 2.458859868825680E-02 1.277357053695800E-01 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 2.714060486174280E-03 -1.405443087293290E-02 -3.143199794530790E-02 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S9 S10 S11 K 0.000000000000000E+00 0.000000000000000E+00 -1.000000000000000E+01 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 -9.847182575933280E-02 8.007026856081160E-02 -1.186845753543090E-01 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 -1.120214790674960E-01 -3.313977945585520E-01 1.809734538731670E-01 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 6.933037713097220E-02 1.532339906889390E-01 -4.157139774311170E-01 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 -8.375820067520630E-01 -5.111780101095970E-01 2.534340535635670E-01 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S12 S13 S14 K 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A3 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A4 -1.611873159257590E-01 6.371033184129980E-02 1.915881880537000E-01 A5 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A6 3.215614287338210E-01 -1.301603434609860E-01 -1.445621413949080E-02 A7 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A8 -2.527617780309280E-01 4.950043162395670E-02 -5.641575462317510E-03 A9 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A10 5.986192881508690E-02 -1.967146400724200E-02 -1.944289394893290E-03 A11 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00 0.000000000000000E+00

S15 S16 K 0.000000000000000E+00 0.000000000000000E+00 A3 -5.824960650456110E-02 -7.899577943179050E-02 A4 -9.597016896909940E-03 -1.691659667674190E-01 A5 3.229468096139420E-02 -9.811740028447620E-02 A6 -2.615380206094760E-01 3.058838003646320E-01 A7 8.349600652260650E-01 -1.296818505126680E-01 A8 -8.159327158937640E-01 -7.730890024776610E-02 A9 3.320662951480450E-01 7.384239136921180E-02 A10 -5.109416906142120E-02 -1.587416655503860E-02 A11 0.000000000000000E+00 0.000000000000000E+00 A12 0.000000000000000E+00 0.000000000000000E+00 A13 0.000000000000000E+00 0.000000000000000E+00 A14 0.000000000000000E+00 0.000000000000000E+00 A15 0.000000000000000E+00 0.000000000000000E+00 A16 0.000000000000000E+00 0.000000000000000E+00 A17 0.000000000000000E+00 0.000000000000000E+00 A18 0.000000000000000E+00 0.000000000000000E+00 A19 0.000000000000000E+00 0.000000000000000E+00 A20 0.000000000000000E+00 0.000000000000000E+00

FIG. 10 shows the aberrations of the fifth example. From the aberration diagram of FIG. 10 , it is obvious that the camera module 11 of the fifth example can satisfactorily correct various aberrations despite its small size and wide angle. Excellent optical properties.

In the description of the embodiments of the present disclosure, it should be understood that "center", "longitudinal", "lateral", "length", "width", "thickness", "top", "bottom", "front", " terms such as rear, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise It should be construed as referring to the orientation or location described or shown in the figures in question. These relative terms are only used to simplify the description of the present disclosure, and do not indicate or imply that a referenced device or element must have a particular orientation, or must be constructed or operated in a particular orientation, and therefore, these terms should not be construed as limiting the disclosure.

Furthermore, terms such as "first" and "second" are used herein for descriptive purposes and are not intended to indicate or imply relative importance or significance, or to imply the number of technical features indicated. Accordingly, features defined as "first" and "second" may include one or more of those features. In the description of the present disclosure, "plurality" means "two or more" unless stated otherwise.

In describing embodiments of the present disclosure, unless otherwise stated or limited, terms such as "installed," "connected," "coupled," and the like, are broad and may be, for example, fixed connections, detachable connections, or integral connections; It can also be a mechanical connection or an electrical connection; it can also be a direct connection or an indirect connection through an intermediate structure; it can also be an internal communication between two elements that can be understood by those skilled in the art according to specific situations.

In the embodiments of the present disclosure, unless otherwise stated or limited, the structure in which the first feature is "above" or "under" the second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include a first feature in direct contact with the second feature. Embodiments in which a feature and a second feature are not in direct contact with each other but are in contact through additional features formed between them. Furthermore, the fact that a first feature is "above", "over" or "on top" of a second feature may include embodiments where the first feature is "above", "over" or "on top of" the second feature orthogonally or obliquely ", or simply means that the height of the first feature is higher than the height of the second feature; while the first feature is "below", "below" or "bottom" the second feature may include embodiments where the first feature is orthogonal Either obliquely "below", "under" or "bottom" of the second feature, or simply means that the height of the first feature is lower than the height of the second feature.

Various embodiments and examples have been provided in the above description to implement different structures of the present disclosure. In order to simplify the present disclosure, certain elements and arrangements are described above. However, these elements and arrangements are by way of example only, and are not intended to limit the present disclosure. Furthermore, reference numerals and/or reference letters may be repeated in different examples of the present disclosure. This repetition is for the purpose of simplicity and clarity and does not refer to a relationship between different embodiments and/or arrangements. Additionally, examples of different processes and materials are provided in this disclosure. However, those skilled in the art will understand that other processes and/or materials may also be used.

References throughout this specification to "one embodiment," "some embodiments," "one exemplary embodiment," "one example," "one specific example," or "some examples" are meant to be described in conjunction with the embodiments or examples The particular feature, structure, material or characteristic of the present disclosure is included in at least one embodiment or example of the present disclosure. Thus, appearances of the above phrases throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Furthermore, the particular features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Any process or method described in a flowchart or otherwise described herein may be understood as comprising one or more modules, code segments or portions of code comprising executable instructions for implementing specified logical functions or steps in the process, and The scope of the preferred embodiments of the present disclosure includes other implementations, as those skilled in the art will understand that the functions may be performed in a different order than shown or discussed, including in substantially the same order or in the reverse order.

Logic and/or steps otherwise described in this disclosure or shown in flowcharts, eg, specific executable instruction sequence listings for implementing the logical functions, may be embodied in any computer to be used by the instruction execution system, device, or apparatus. A readable medium (eg, a computer-based system, a system including a processor, or other systems capable of obtaining instructions from an instruction execution system, apparatus, and apparatus that executes the instructions), or used in connection with the instruction execution system, apparatus, and apparatus. For the purposes of this specification, a "computer-readable medium" can be any means suitable for containing, storing, communicating, propagating, or transmitting a program for use by or in connection with an instruction execution system, apparatus, or apparatus. More specific examples of computer readable media include, but are not limited to: electronic connections with one or more wires (electronic devices), portable computer accessories (magnetic devices), random access memory (RAM), read only memory (ROM) , Rewritable Programmable Read Only Memory (EPROM or Flash), Fiber Optic Devices and Portable Compact Disc Read Only Memory (CDROM). Furthermore, the computer readable medium may even be paper or other suitable medium on which the program can be printed, for example, the paper or other suitable medium may be optically scanned and then edited, decrypted if necessary by other suitable methods or processing, obtaining the program electronically and then storing the program in computer memory.

It should be understood that various parts of the present disclosure may be implemented by hardware, software, firmware or a combination thereof. In the above-described embodiments, various steps or methods may be implemented by software or firmware stored in memory and executed by an appropriate instruction execution system. For example, if implemented by hardware, also in another embodiment, these steps or methods may be implemented by one or a combination of the following techniques known in the art: a logic gate circuit with a logic function for implementing a data signal discrete logic circuits, application-specific integrated circuits with appropriate combinational logic gate circuits, programmable gate arrays (PGA) and field programmable gate arrays (FPGA), etc.

Those skilled in the art should understand that all or part of the steps in the above exemplary method of the present disclosure can be implemented by a program instructing relevant hardware, the program can be stored in a computer-readable storage medium, and when the program runs on a computer, the program includes the steps of the present disclosure. one or more steps of a method embodiment.

In addition, each functional unit of the embodiments of the present disclosure may be integrated in one processing module, or these units may exist physically separately, or two or more units may be integrated in one processing module. The integrated module can be implemented in the form of hardware or in the form of software functional modules. When the integrated module is implemented in the form of a software functional module and sold or used as a stand-alone product, the integrated module may be stored in a computer-readable storage medium.

The above-mentioned storage medium may be a read-only memory, a magnetic disk, a CD, or the like.

Although embodiments of the present disclosure have been shown and described, it should be understood by those skilled in the art that these embodiments are illustrative and not to be construed as limiting the present disclosure, and that Embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. An imaging lens, comprising: a front optical system disposed on the object side; and The rear-group optical system provided on the imaging surface side, wherein, The front group optical system includes at least one lens with negative refractive power and at least one lens with positive refractive power; the rear optical system includes an aperture stop and at least one lens having negative refractive power; the lens positioned closest to the object side in the front-group optical system is a lens having negative refractive power and serving as a lens protection filter, and The lens positioned closest to the imaging surface side in the rear group optical system has an aspherical shape with an inflection point on the surface on the imaging surface side. 2. The imaging lens according to claim 1, wherein the imaging lens satisfies the following conditional expression: 0.5<(r11+r12)/(r11-r12)<2.5, Here, r11 is the central radius of curvature of the object-side surface of the lens located closest to the object side, and r12 is the central radius of curvature of the imaging surface-side surface of the lens located closest to the object side. 3. The imaging lens according to claim 1, wherein the imaging lens satisfies the following conditional expression: ∑d/f<8.0, Here, Σd is the distance from the vertex of the object-side surface of the lens located closest to the object side to the optical axis of the imaging surface, and f is the focal length of the entire optical system. 4. The imaging lens according to claim 1, wherein the imaging lens satisfies the following conditional expression: 0.5<fs/f<13, where fs is the composite focal length of the rear optical system, and f is the focal length of the entire optical system. 5. The imaging lens according to claim 1, wherein the lens on the side closest to the imaging surface is a lens having a negative refractive power. 6. The imaging lens according to claim 1, wherein a surface of the lens on the imaging surface side closest to the imaging surface side has a concave shape in the vicinity of an optical axis and a convex shape in a peripheral portion. 7. The imaging lens of claim 1, wherein a viewing angle of the imaging lens is 100 degrees or more. 8. The imaging lens according to claim 1, wherein the lens on the side closest to the imaging surface is made of plastic. 9. A camera module, comprising: The imaging lens of any one of claims 1-8; and An image sensor including an imaging surface. 10. An imaging device comprising the camera module of claim 9.

Images