CN115715378A - Imaging lens assembly, camera module and imaging apparatus - Google Patents

Abstract

An imaging lens assembly (21) includes at least two lenses having positive refractive power and at least two lenses having negative refractive power, wherein the lens disposed on the most imaging surface side has an aspherical shape with an inflection point, the total length and the distance from the lens disposed on the most imaging surface side to the imaging surface vary between a photographing state and a lens storage state, and the lenses satisfy FB/Yh ≧ 0.5, and Σ Ld ≦ 0.75, wherein FB is the distance from the imaging surface side edge of the lens disposed on the most imaging surface side to the imaging surface, yh is the image height, Σ Ld is the distance from the vertex of the object side surface of the lens disposed on the most object side to the imaging surface side edge of the lens disposed on the most imaging surface side, and Σ d is the total length.

Description

Imaging lens assembly, camera module and imaging apparatus

Technical Field

The present disclosure relates to an imaging lens assembly, a camera module, and an imaging apparatus, and more particularly, to an imaging lens assembly, a camera module, and an imaging apparatus which are small and have good optical performance.

Background

In recent years, portable imaging apparatuses such as mobile phones and digital cameras are being widely used. With the recent miniaturization of imaging apparatuses, imaging lens assemblies mounted on such imaging apparatuses also need to be downsized. Further, in order to keep up with the improvement in resolution of the imaging element mounted on the imaging apparatus, the imaging lens assembly is expected to have higher resolution.

To reduce the size of the imaging lens assembly, the back focal length of the imaging lens assembly is typically shortened in order to shorten the overall length of the imaging lens assembly.

However, if the back focal length is shortened, the overall length of the imaging lens assembly, such as a foldable imaging lens assembly, varies between the photographing state and the lens storage state, and cannot be sufficiently shortened in the lens storage state.

Therefore, there is room for improvement in conventional imaging lens assemblies from the standpoint of achieving good optical performance while being small in size.

Disclosure of Invention

The present disclosure is directed to solving at least one of the problems set forth above. Accordingly, the present disclosure needs to provide an imaging lens assembly, a camera module and an imaging apparatus.

In accordance with the present disclosure, an imaging lens assembly includes:

at least two lenses having positive refractive power; and

at least two lenses having negative refractive power, wherein

The lens disposed on the most imaging surface side has an aspherical shape with an inflection point,

the total length of the imaging lens assembly, which is the distance on the optical axis from the vertex of the object-side surface of the lens arranged most to the imaging surface, and the distance from the lens arranged most to the imaging surface side to the imaging surface, are configured to vary between a photographing state and a lens storage state, and

the imaging lens assembly satisfies the following conditional expression in a photographing state:

FB/Yh≥0.5，

ΣLd/Σd≤0.75，

where FB is a distance from an imaging surface side edge of the lens disposed on the most imaging surface side to the imaging surface, yh is an image height, Σ Ld is a distance from a vertex of an object side surface of the lens disposed on the most object side to an imaging surface side edge of the lens disposed on the most imaging surface side in the optical axis direction, and Σ d is a total length of the imaging lens assembly.

In one example, the total length of the imaging lens assembly and the distance from the lens arranged on the most imaging surface side to the imaging surface are shorter in the lens storage state than in the photographing state.

In one example, the imaging lens assembly may further satisfy the following conditional expression in the photographing state:

0.9<∑d/f<1.2，

where f is the focal length of the entire optical system.

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

0.9<fs/f<1.9，

wherein fs is a composite focal length of lenses from the most object side arranged lens to the most object side arranged negative refractive power lens.

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

0.2<Fno/Yh<0.9，

where Fno is the F number.

In one example, the lens arranged on the most imaging surface side may be a lens having a negative refractive power.

In one example, a surface of the lens disposed on the most imaging surface side on the imaging surface side may be concave in the vicinity of the optical axis and convex in the peripheral portion.

In one example, the lens arranged on the most imaging surface side is formed of plastic.

According to the present disclosure, a camera module includes:

the imaging lens assembly; and

an image sensor including the imaging surface.

In one example, the camera module may further include an Infrared (IR) filter disposed between the imaging lens assembly and the image sensor.

According to the present disclosure, an image forming apparatus includes:

the camera module; and

a housing for storing the imaging lens assembly (housing).

Drawings

These and/or other aspects and advantages of embodiments of the present disclosure will become apparent and more readily appreciated from the following description, taken in conjunction with the accompanying drawings. In the drawings:

fig. 1A is a schematic diagram of a camera module illustrating a configuration in which the overall length of an imaging lens assembly changes between a photographing state and a lens storage state according to the present disclosure.

Fig. 1B is a schematic diagram of a camera module illustrating an example of a mount and lens drive mechanism according to the present disclosure.

Fig. 2 is a configuration diagram of a camera module according to a first example of the present disclosure;

fig. 3 is an aberration diagram of a camera module according to a first example of the present disclosure;

fig. 4 is a configuration diagram of a camera module according to a second example of the present disclosure;

fig. 5 is an aberration diagram of a camera module according to a second example of the present disclosure;

fig. 6 is a configuration diagram of a camera module according to a third example of the present disclosure;

fig. 7 is an aberration diagram of a camera module according to a third example of the present disclosure;

fig. 8 is a configuration diagram of a camera module according to a fourth example of the present disclosure;

fig. 9 is an aberration diagram of a camera module according to a fourth example of the present disclosure;

fig. 10 is a configuration diagram of a camera module according to a fifth example of the present disclosure; and

fig. 11 is an aberration diagram of a camera module according to a fifth example of the present disclosure.

Detailed Description

Embodiments of the present disclosure will be described in detail, and examples of the embodiments will be shown in the accompanying drawings. The same or similar elements and elements having the same or similar functions are denoted by the same reference numerals throughout the specification. The embodiments described herein with reference to the drawings are illustrative and intended to be illustrative of the present disclosure, but should not be construed as limiting the disclosure.

< brief summary of the disclosure >

First, an outline of the present disclosure will be described. As shown in fig. 1A, the camera module 11 to which the present disclosure is applied is configured to change the total length Σ d and the flange distance FB of the imaging lens assembly 21 between a shooting state in which a subject (object) (recorded as an image) is shot and a lens storage state in which the imaging lens assembly 21 is stored in the housing of the camera module 11. In fig. 1A, a chain line indicates an optical axis of the camera module (the same applies hereinafter). Here, the total length Σ d of the imaging lens assembly 21 is a distance from the vertex of the object side surface of the lens disposed most to the object side on the optical axis to the imaging surface S. The flange distance FB of the imaging lens assembly 21 is the distance from the imaging surface S-side edge of the lens disposed most on the imaging surface S side to the imaging surface S. In other words, the flange distance FB is the shortest distance from the lens surface arranged on the most imaging surface S side to the imaging surface S. Σ Ld in fig. 1A is a lens length indicating only the length of the lens portion of the optical system constituting the imaging lens assembly 21 in the optical axis direction. That is, the lens length Σ Ld is a distance from the vertex of the object-side surface of the lens arranged most to the object side to the imaging surface S-side edge of the lens arranged most to the imaging surface S side in the optical axis direction. The total length Σ d is the sum of the lens length Σ Ld and the flange distance FB.

The camera module 11 has a shorter overall length Σ d and a shorter flange distance FB in the lens storage state than in the shooting state. For example, when a predetermined user operation to start the shooting mode is performed, the camera module 11 pushes out the imaging lens assembly 21 accommodated in the housing in a direction protruding from the housing by using the lens driving mechanism 24 (e.g., a motor). On the other hand, when a predetermined user operation to end the shooting mode is performed, the camera module 11 retracts the imaging lens assembly 21 by using the lens driving mechanism 24 and stores it in the housing. Such a camera module 11 is called a foldable camera module having excellent storability and portability when photographing is not performed.

As shown in fig. 1B, the imaging lens assembly 21 may be held in a lens barrel 25, and the lens barrel 25 may be moved in the optical axis direction by a lens driving mechanism 24. In fig. 1B, the lenses included in the imaging lens assembly 21 are illustrated in a simplified manner. In the example shown in fig. 1B, the lens barrel 25 is arranged within the housing 26, and can be moved in the optical axis direction together with the imaging lens assembly 21 by the expandable member 241 constituting a part of the lens driving mechanism 24. The expandable member 241 is driven in the optical axis direction by a motor 242 constituting a part of the lens driving mechanism 24. As shown in fig. 1B, the lens barrel 25 and the imaging lens assembly 21 are stored in the housing 26 in a lens storage state, and project to the object side with respect to the housing 26 in a shooting state.

The camera module 11 to which the present disclosure is applied is configured as shown in fig. 2, 4, 6, 8, and 10, for example.

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

As described above, the imaging lens assembly 21 is a lens configured such that the full length Σ d and the flange distance FB are changed between the shooting state and the lens storage state, and is designed to maintain good optical performance with a small size.

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 the imaging plane of the imaging lens assembly 21. The image sensor 23 receives incident light from an object (object side) via the imaging lens assembly 21 and the optical filter 22, photoelectrically converts the light, and outputs image data obtained by the photoelectric conversion of the light to the next stage. The optical filter 22 arranged between the imaging lens assembly 21 and the image sensor 23 may be, for example, an IR (infrared) filter that cuts infrared light from incident light from the imaging lens assembly 21.

The imaging lens assembly 21 will be described in more detail. The imaging lens assembly 21 includes at least two lenses having positive refractive power and at least two lenses having negative refractive power. The lens disposed most on the imaging surface S side has an aspherical shape with an inflection point. Specifically, in the example shown in fig. 2, the surface on the imaging surface S side of the lens disposed most on the imaging surface S side is an aspherical surface having an inflection point in the vicinity of the lens edge. More specifically, the surface on the imaging surface S side of the lens disposed most on the imaging surface S side is concave in the lens center (i.e., in the vicinity of the optical axis) and convex in the peripheral portion (i.e., around the peripheral region away from the center). In the shooting state, the ratio of the flange distance FB to the full length Σ d is sufficiently large. Since the flange pitch FB is large in the photographing state, a sufficiently large air gap can be fixed between the imaging lens assembly 21 and the imaging surface S. The larger air gap enables the imaging lens assembly 21 to be retracted to the imaging surface S side by a larger moving amount when the imaging lens assembly 21 is stored in the housing.

By employing such a foldable imaging lens assembly 21 comprising at least two lenses of positive refractive power and at least two lenses of negative refractive power, and having a large air gap between the imaging lens assembly 21 and the imaging surface S, good optical performance can be obtained with a small size. Further, since the lens disposed on the most imaging surface S side has an aspherical shape with an inflection point, good optical performance can be obtained at all image heights.

Further, when the camera module 11 satisfies the following formula (1) in a photographing state, the imaging lens assembly 21 can be miniaturized and its good optical performance can be more effectively maintained:

FB/Yh≥0.5 (1)

in the formula (1), FB is a flange pitch of the above-described imaging lens assembly 21, which is a distance from the imaging surface S-side edge of the lens disposed on the most imaging surface side to the imaging surface S (the same applies hereinafter). Yh is the image height (the same applies hereinafter).

As the ratio shown in equation (1) increases, a larger flange distance B can be obtained while fixing the size of the image sensor 23. As a result, the air gap for storing the above-described imaging lens assembly 21 can be larger, so that the imaging lens assembly 21 can be miniaturized and its good optical performance can be more effectively maintained.

Further, when the camera module 11 satisfies the following formula (2) in a photographing state, the imaging lens assembly 21 can be miniaturized and its good optical performance can be more effectively maintained:

∑Ld/∑d≤0.75 (2)

in the formula (2), Σ Ld is the above-described lens length, i.e., the distance from the apex of the object-side surface of the lens disposed most to the object side to the imaging surface S-side edge of the lens disposed most to the imaging surface side S in the optical axis direction (the same applies hereinafter). Σ d is the entire length of the above-described imaging lens assembly 21, i.e., the distance from the apex of the object-side surface of the most object-side arranged lens to the imaging surface S in the optical axis direction (the same applies hereinafter).

As the ratio shown in equation (2) decreases, the air gap for the storage imaging lens assembly 21 may be larger, so the imaging lens assembly 21 may be miniaturized and its good optical performance may be more effectively maintained.

Further, when the camera module 11 satisfies the following formula (3) in a photographing state, the imaging lens assembly 21 can be miniaturized and its good optical performance can be more effectively maintained:

0.9<∑d/f<1.2 (3)

in the formula (3), f is the focal length of the entire optical system (the same applies hereinafter).

If the value of Σ d/f is lower than the lower limit value (i.e., 0.9) of formula (3), the manufacturability of the imaging lens assembly 21 decreases, and it is difficult to maintain the optical performance. On the other hand, if the value of Σ d/f exceeds the upper limit value (i.e., 1.2) of the formula (3), it is difficult to miniaturize the imaging lens assembly 21.

Furthermore, the manufacturability of the imaging lens assembly 21 and its good optical performance can be more effectively maintained when the camera module 11 satisfies the following formula (4):

0.9<fs/f<1.9 (4)

in the formula (4), fs is a composite focal length of lenses from the lens disposed on the most object side to the negative refractive power lens disposed on the most object side (the same applies hereinafter).

If the value of fs/f is lower than the lower limit value of the formula (4) (i.e., 0.9), the sensitivity of decentering error of the lens group on the imaging surface S side becomes very high, and the difficulty in manufacturing the imaging lens assembly 21 increases. On the other hand, if the value of fs/f exceeds the upper limit value of the formula (4) (i.e., 1.9), spherical aberration is excessively corrected, and it is difficult to maintain optical performance.

Further, when the camera module 11 satisfies the following formula (5), the imaging lens assembly 21 can be miniaturized and the manufacturability of the imaging lens assembly 20 can be more effectively maintained:

0.2<Fno/Yh<0.9 (5)

in formula (5), fno is an F-number (the same applies hereinafter).

If the value of Fno/Yh is lower than the lower limit value (i.e., 0.2) of equation (5), it is difficult to miniaturize the imaging lens assembly 21. On the other hand, if the value of Fno/Yh exceeds the upper limit value (i.e., 0.9) of the formula (5), the sensitivity of the decentering error becomes very high, and the difficulty in manufacturing the imaging lens assembly 21 increases.

Further, in view of the formation of the lens, an aspherical lens in the imaging lens assembly 21, particularly an aspherical lens of an aspherical shape having an inflection point, is preferably formed of a plastic material (glass material). Further, among the lenses constituting the imaging lens assembly 21, a lens having a size equal to or smaller than a certain size may be a lens formed of a plastic material, and a lens larger than the certain size may be a lens formed of a glass material. This is because it is difficult to form an aspherical lens or a relatively small lens using a material other than a plastic material.

Such a camera module 11 including the imaging lens assembly 21 is suitable for small digital devices (imaging devices) such as cell phones, wearable cameras, and monitoring cameras.

< example of configuration of Camera Module >

Next, a more specific example to which the present disclosure is applied will be described. In the following example, "Si" indicates the serial number of the i-th surface among serial numbers increasing in order from the object side toward the imaging surface S side. The optical elements of the respective surfaces are shown with the respective surface numbers "Si". The literal meaning of "first surface" or "1 st surface" indicates a surface on the object side of the lens, and the literal meaning of "second surface" or "2 nd surface" indicates a surface on the imaging surface S side of the lens. "R" indicates the value of the central radius of curvature (mm) of the surface. With regard to "R", "E + i" indicates an exponential expression with a base of 10, i.e., "10i". For example, "1.00E +18" indicates "1.00X 1018". Such an exponential expression is also applied to aspherical coefficients described later. "Di" indicates a distance value (mm) between the ith surface and the (i + 1) th surface on the optical axis. "Ndi" indicates the value of the refractive index of the material of the optical element having the i-th surface at the d-line (wavelength 587.6 nm). "ν di" indicates the value of the abbe number of the material of the optical element having the i-th surface at the d-line.

The imaging lens assembly 21 used in the following examples includes a lens having an aspherical surface. The aspherical shape of the lens is defined by the following formula (6):

Z＝C×h2/{1+(1-K×C2×h2)1/2}+∑An×hn (6)

(n = integer greater than 3).

In the formula (6), Z is the depth of An aspherical surface, C is paraxial curvature equal to 1/R, h is the distance from the optical axis to the lens surface, K is eccentricity (second-order aspherical coefficient), and An is nth-order aspherical coefficient.

[ first example ]

A first example of applying a specific numerical value to the camera module 11 shown in fig. 2 will be described.

In the first example, the imaging lens assembly 21 includes, in order from the object side toward the imaging surface S side, a first lens L1 having positive refractive power with a convex surface toward the object side, a second lens L2 having negative refractive power with a concave surface toward the imaging surface S side, a third lens L3 having positive refractive power with a convex surface toward the object side, a fourth lens L4 having positive refractive power with a convex surface toward the imaging surface S side, and a fifth lens L5 having negative refractive power with a concave surface toward the imaging surface S side. The aperture stop 3 is disposed on the imaging surface S side with respect to the vertex of the first surface of the first lens L1, and on the object side with respect to the second surface of the first lens L1.

Table 1 shows lens data of the first example. Table 2 shows the focal length of each lens and the combined focal length fs from the lens disposed on the most object side to the lens of the negative refractive power lens disposed on the most object side. In the example of table 2, fs is the combined focal length of the first lens L1 and the second lens L2. Table 3 shows the focal length F, F-number Fno, angle of view 2 ω, total length Σ d of the imaging lens assembly obtained when an object point is photographed at infinity, lens length Σ Ld, flange distance FB, image height Yh of the entire system, and values corresponding to the conditional expressions. Table 4 shows the aspherical coefficients of the imaging lens assembly 21.

TABLE 1

Si	Ri	Di	Nd	vd
					1 (virtual surface)		1.00E+10
2 (aperture diaphragm)	1.00E+18	-0.4350
					3 (L1 surface 1)	4.374	1.740	1.544	56.07
4 (L1 surface 2.)	287.191	0.116
					5 (L2 surface 1)	45.979	0.580	1.635	23.97
6 (L2 surface 2)	6.872	1.132
					7 (L3 surface 1)	5.068	1.233	1.535	55.73
8 (L3 surface 2)	5.408	1.297
					9 (L4 surface 1)	-8.132	1.116	1.635	23.97
10 (L4 surface 2)	-7.602	0.946
					11 (L5 surface 1)	4.837	0.841	1.535	55.73
12 (L5 surface 2)	3.667	4.496
					13 (light Filter)	1.00E+18	0.210	1.517	64.20
14 (image plane)		0.300

TABLE 2

Lens and lens assembly	Focal length
		L1	8.16
L2	-12.80
		L3	66.67
L4	101.08
		L5	-37.88
fs	1653

TABLE 3

f	13.89
		Fno	2.40
2ω	43.96
		∑d	14.01
∑Ld	9.23
		FB	4.78
Yh	5.80
		FB/Yh	0.82
∑Ld/∑d	0.66
		∑d/f	1.01
fs/f	1.19
		Fno/Yh	0.41

TABLE 4

	S3 (L1 surface 1)	S4 (L1 surface 2)	S5 (L2 surface 1)
				R	4.374282983166210E+00	2.871907543496870E+02	4.597895906347360E+01
K	0.000000000000000E+00	0.000000000000000E+00	-1.000000000000000E+01
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-4.693491718633530E-04	-2.474388150713030E-04	2.168081232538260E-05
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-1.077430137016600E-05	-1.060870625349310E-05	-7.602691254832170E-05
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	-1.712811142173320E-06	-1.120240849885720E-05	-1.498444793958760E-05
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	7.531041685287040E-08	8.863717906063860E-07	1.148414196152800E-06
				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

	S6 (L2 surface 2)	S7 (L3 surface 1)	S8 (L3 surface 2)
				R	6.872375963068580E+00	5.067803281054720E+00	5.408417251708880E+00
K	-4.725508332707000E+00	0.000000000000000E+00	0.000000000000000E+00
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	6.304780964013690E-04	-4.039143693627890E-03	-1.465085163963590E-03
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-1.164637704860940E-04	-2.959489957991050E-04	-6.304259593196880E-04
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	-1.064118087493940E-05	-5.481148742676070E-06	-6.868848501674320E-06
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	7.270296654970850E-07	3.211125651092000E-06	2.953301674306350E-06
				A11	0.0000000000000000E+00	0.0000000000000000E+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 (L4 surface 1)	S10 (L4 surface 2)	S11 (L5 surface 1)
				R	-8.132357657210610E+00	-7.602284841309550E+00	4.836692447425280E+00
K	-1.000000000000000E+01	-3.427271445856000E+00	-9.058246374816000E-01
				A3	0.000000000000000E+00	0.000000000000000E+00	-1.153707456084960E-02
A4	1.270040731242770E-03	-2.425071878072670E-03	-1.325963089703600E-02
				A5	0.000000000000000E+00	0.000000000000000E+00	-8.842117240779590E-03
A6	-5.764749445969710E-04	7.763676491145470E-04	4.204416790531720E-03
				A7	0.000000000000000E+00	0.000000000000000E+00	2.376391336780540E-04
A8	-1.847631932837120E-05	-1.492593879979130E-04	-2.397025266763410E-04
				A9	0.000000000000000E+00	0.000000000000000E+00	-1.986558079681330E-05
A10	-7.575632144696760E-06	6.584153583154160E-06	1.400363234916750E-06
				A11	0.000000000000000E+00	0.000000000000000E+00	6.747713206274630E-07
A12	0.0000000000000000E+00	0.000000000000000E+00	3.760370679288910E-07
				A13	0.0000000000000000E+00	0.000000000000000E+00	7.888365878374740E-08
A14	0.000000000000000E+00	0.000000000000000E+00	-4.270234700709730E-09
				A15	0.000000000000000E+00	0.000000000000000E+00	-1.095924788941590E-08
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 (L5 surface 2)
		R	3.667126793957230E+00
K	-3.877443356251000E+00
		A3	-2.250587601237130E-02
A4	2.195699878341100E-02
		A5	-4.367753302174020E-02
A6	2.947868981033170E-02
		A7	-1.031736827330870E-02
A8	2.004747311113440E-03
		A9	-2.047444140686270E-04
A10	8.203834256450030E-06
		A11	0.000000000000000E+00
A12	0.000000000000000E+00
		A13	0.000000000000000E+00
A14	0.000000000000000E+00
		A15	0.000000000000000E+00
A16	0.000000000000000E+00
		A17	0.000000000000000E+00
A18	0.000000000000000E+00
		A19	0.000000000000000E+00
A20	0.000000000000000E+00

The aberrations in the first example are shown in figure 3. Fig. 3 shows spherical aberration, astigmatism (field curvature), and distortion as examples of aberrations. Each of these aberration diagrams shows aberration with d-line (587.56 nm) as a 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 graph showing astigmatism, "S" indicates an aberration value on a sagittal image surface, and "T" indicates an aberration value on a tangential image surface. "IMG HT" indicates the image height. The same applies to the aberration diagrams in other examples.

As can be seen from the aberration diagram in fig. 3, it is apparent that the camera module 11 in the first example can satisfactorily correct various aberrations with a small size to obtain good optical performance.

[ second example ]

Next, a second example in which a specific numerical value is applied to the camera module 11 shown in fig. 4 will be described.

In the second example, the imaging lens assembly 21 includes, in order from the object side toward the imaging surface S side, a first lens L1 having positive refractive power with a convex surface toward the object side, a second lens L2 having negative refractive power with a concave surface toward the imaging surface S side, a third lens L3 having positive refractive power with a convex surface toward the object side, a fourth lens L4 having negative refractive power, a fifth lens L5 having positive refractive power, and a sixth lens Lb having negative refractive power with a concave surface toward the imaging surface S side. The aperture stop 3 is disposed on the imaging surface S side with respect to the vertex of the first surface of the first lens L1 and on the object side with respect to the second surface of the first lens L1.

Table 5 shows lens data of the second example. Table 6 shows the focal length of each lens and the combined focal length fs from the lens disposed on the most object side to the lens of the negative refractive power lens disposed on the most object side. In the example of table 6, fs is the combined focal length of the first lens L1 and the second lens L2. Table 7 shows the focal length F, F-number Fno, angle of view 2 ω, total length Σ d of the imaging lens assembly obtained when an object point is photographed at infinity, lens length Σ Ld, flange distance FB, image height Yh of the entire system, and values corresponding to the conditional expressions. Table 8 shows the aspherical coefficients of the imaging lens assembly 21.

TABLE 5

Si	Ri	Di	Nd	vd
					1 (virtual surface)		1.00E+10
2 (aperture diaphragm)	1.00E+18	-0.300
					3 (L1 surface 1)	4.006	1.418	1.5439	56.07
4 (L1 surface 2)	-30.597	0.080
					5 (L2 surface 1)	159.085	0.400	1.6349	23.97
6 (L2 surface 2)	5.907	0.535
					7 (L3 surface 1)	4.459	0.800	1.5350	55.73
8 (L3 surface 2)	10.613	0.879
					9 (L4 surface 1)	-12.797	0.500	1.6349	23.97
10 (L4 surface 2)	-24.255	0.429
					11 (L5 surface 1)	46.285	0.570	1.6349	23.97
12 (L5 surface 2)	-23.390	0.632
					13 (L6 surface 1)	2.586	0.566	1.5350	55.73
14 (L6 surface 2)	1.740	2.305
					15 (optical Filter)	1.00E+18	0.210	1.5168	64.20
16 (image plane)		0.335

TABLE 6

Lens and lens assembly	Focal length
		L1	6.59
L2	-9.58
		L3	13.71
L4	-42.99
		L5	24.31
L6	-12.93
		fs	15.22

TABLE 7

f	8.72
		Fno	2.04
2ω	47.40
		∑d	9.66
∑Ld	7.13
		FB	2.53
Yh	4.00
		FB/Yh	0.63
∑Ld/∑d	0.74
		∑d/f	1.11
fs/f	1.74
		Fno/Yh	0.51

TABLE 8

	S3 (L1 surface 1)	S4 (L1 surface 2)	S5 (L2 surface 1)
				R	4.006036912249650E+00	-3.059657506670850E+01	1.590853555729170E+02
K	0.0000000000O0000E+00	0.000000000000000E+00	-1.000000000000000E+01
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-2.911306002287180E-03	-1.869797970476330E-03	1.275385078687380E-03
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-3.408908914340770E-04	-1.796185223278350E-04	-6.570021080222750E-04
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	3.532521789308460E-05	-2.239975670789690E-04	-2.352566028965800E-04
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	-1.619257476658450E-05	2.427022300223210E-05	3.913910285616110E-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	0.1000000000000000E+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
				A1 9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A20	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00

	S6 (L2 table 2)Noodle)	S7 (L3 surface 1)	S8 (L3 surface 2)
				R	5.907365559808180E+00	4.459290553981390E+00	1.061345730016500E+01
K	-4.725508332707000E+00	0.000000000000000E+00	0.000000000000000E+00
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-4.072027170678340E-04	-8.009326473282610E-03	-7.129721429703220E-03
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-8.063463908790730E-04	1.832661693798400E-04	-4.166447841175850E-04
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	-2513527752760780E-06	7.268818128062720E-05	9.058848771982310E-05
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	8.009529675772380E-06	6.272140343619960E-06	-9.238262502462980E-07
				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 (L4 surface 1)	S10 (L4 surface 2)	S11 (L5 surface 1)
				R	-1.279713966253000E+01	-2.425527509538350E+01	4.628525193138870E+01
K	0.000000000000000E+00	0.000000000000000E+00	-1.000000000000000E+01
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-3.106879678325980E-04	-4.700419126016110E-04	-3.100349416829190E-03
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-6.596745553601700E-05	-1.505342550263110E-04	-2.242223307334680E-03
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	-3.316528259129590E-05	1.140241375485240E-05	8.518141013942330E-05
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	-3.703592677877890E-06	2.994919561042530E-06	-8.349137166317830E-05
				A11	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A12	-8.223473914991080E-08	-2.584730356830070E-07	0.000000000000000E+00
				A13	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A14	2.351183851560890E-08	-1.269433084061660E-07	0.000000000000000E+00
				A15	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A16	1.345166597769240E-08	-5.094906022710900E-09	0.000000000000000E+00
				A17	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A18	-8.229384911763120E-10	1.376496516411150E-08	0.000000000000000E+00
				A19	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A20	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00

	S12 (L5 surface 2)	S13 (L6 surface 1)	S14 (L6 surface 2)
				R	-2.338972920413400E+01	2.586117361799110E+00	1.739519364157910E+00
K	-3.427271445856000E+00	-9.058246374816000E-01	-3.877443356251000E+00
				A3	0.000000000000000E+00	0.000000000000000E+00	-3.156314601841710E-02
A4	-1.351117265521130E-02	-1.086044438002640E-01	6.504362960183020E-02
				A5	0.000000000000000E+00	0.000000000000000E+00	-1.956073678969560E-01
A6	4.618882679649040E-03	2.0999911395551 50E-02	1.915128776542730E-01
				A7	0.000000000000000E+00	0.000000000000000E+00	-9.580248845093770E-02
A8	-1.338429278126440E-03	-2.666902724292960E-03	2.682163639556710E-02
				A9	0.000000000000000E+00	0.000000000000000E+00	-4.052068856393590E-03
A10	8.360160771124060E-05	1.081290747295690E-04	2.593076928814220E-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

The aberration in the second example is shown in fig. 5. As is apparent from the aberration diagram of fig. 5, it is apparent that the camera module 11 in the second example can satisfactorily correct various aberrations with a small size to obtain good optical performance.

[ third example ]

Next, a third example in which a specific numerical value is applied to the camera module 11 shown in fig. 6 will be described.

In the third example, the imaging lens assembly 21 includes, in order from the object side toward the imaging surface S side, a first lens L1 having positive refractive power with a convex surface toward the object side, a second lens L2 having negative refractive power, a third lens L3 having positive refractive power, and a fourth lens L4 having negative refractive power with a concave surface toward the imaging surface S side. The aperture stop 3 is disposed between the second surface of the second lens L2 and the first surface of the third lens L3.

Table 9 shows lens data of the third example. Table 10 shows the focal length of each lens and the combined focal length fs of the lenses from the lens disposed on the most object side to the lens of negative refractive power disposed on the most object side. In the example of table 10, fs is the combined focal length of the first lens L1 and the second lens L2. Table 11 shows the focal length F, F-number Fno, angle of view 2 ω, total length Σ d of the imaging lens assembly obtained when an object point is photographed at infinity, lens length Σ Ld, flange distance FB, image height Yh of the entire system, and values corresponding to the conditional expressions. Table 12 shows the aspherical coefficients of the imaging lens assembly 21.

TABLE 9

Si	Ri	Di	Nd	vd
					1 (virtual surface)		1.00E+10
2 (L1 surface 1)	3.802	1.157	1.5346	56.27
					3 (L1 surface 2)	177.137	0.060
4 (L2 surface 1)	49.338	0.663	1.6349	23.97
					5 (L2 surface 2)	9.432	1.083
6 (aperture diaphragm)	1.00E+18	1.000
					7 (L3 surface 1)	-110.690	0.904	1.6349	23.97
8 (L3 surface 2)	-12.372	0.575
					9 (L4 surface 1)	6.032	1.004	1.5346	56.27
10 (L4 surface 2)	2.867	3.982
					11 (optical Filter)	1.00E+18	0.210	1.5168	64.20
12 (image plane)		0300

Watch 10

Lens and lens assembly	Focal length
		L1	7.25
L2	-18.49
		L3	21.86
L4	-11.49
		fs	10.67

TABLE 11

f	11.10
		Fno	2.79
2ω	44.30
		∑d	10.94
∑Ld	6.77
		FB	4.17
Yh	4.62
		FB/Yh	0.90
∑Ld/∑d	0.62
		∑d/f	0.99
fs/f	0.96
		Fno/Yh	0.60

TABLE 12

	S2 (L1 surface 1)	S3 (L1 surface 2)	S4 (L2 surface 1)
				R	3.802031290573680E+00	1.771372886332950E+02	4.933809716890890E+01
K	-4.222627690878340E+00	4.133719695076220E+01	5.000000000000000E+02
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	5.654075025085200E-03	-3.128979150769280E-02	-2.324072299924700E-02
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-1.727148067468160E-03	3.085622545088260E-03	-2.523599720932590E-04
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	4.110383094625670E-04	1.153615489433310E-04	1.081511112184180E-03
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	-1.542072600389600E-04	-7.386942944034180E-05	-9.405211160365600E-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 (L2 surface 2)	S7 (L3 surface 1)	S8 (L3 surface 2)
				R	9.432015679091100E+00	-1.106900913845380E+02	-1.237156444816480E+01
K	5.506142808935400E+00	-2.588468378849690E+03	1.640462115279430E+01
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-2.366936547900330E-03	9.968523901728590E-03	1.383750433382940E-02
				A5	0.000000000000000E+00	0.000000000000000E+00	-5.893811720499000E-03
A6	-3.904156329794120E-03	-8.151440882634300E-03	3.250844818240270E-04
				A7	0.000000000000000E+00	0.000000000000000E+00	-1.365951393886340E-03
A8	9.674544420826550E-04	1.941251159888160E-03	-3.918892235408180E-04
				A9	0.000000000000000E+00	0.000000000000000E+00	1.432551110410270E-04
A10	-8.887014499340580E-05	-6.105082011003630E-04	-6.059774084943440E-05
				A11	0.000000000000000E+00	0.000000000000000E+00	6.485884410607930E-05
A12	0.000000000000000E+00	7.586306601039520E-05	4.064953530958530E-05
				A13	0.000000000000000E+00	0.000000000000000E+00	-9.989221485428300E-06
A14	0.000000000000000E+00	0.000000000000000E+00	-7.785903591244450E-06
				A15	0.000000000000000E+00	0.000000000000000E+00	-1.688625481944950E-06
A16	0.000000000000000E+00	0.000000000000000E+00	1.553717889789440E-06
				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 (L4 surface 1)	S10 (L4 surface 2)
			R	6.031969094924200E+00	2.867446207356180E+00
K	-1.000000000000000E+01	-1.000000000000000E+01
			A3	0.000000000000000E+00	0.000000000000000E+00
A4	-2.994042642014170E-02	1.426524525863420E-02
			A5	2.145200416513360E-03	-2.389739685168660E-02
A6	1.355195181183530E-03	7.100742267919820E-03
			A7	-5.254053740457060E-04	4.890011722656620E-04
A8	-6.855671768363250E-04	-4.324272599498770E-04
			A9	2.527814941566280E-04	-3.403857977666240E-06
A10	2.243466607926210E-06	1.851740445568120E-05
			A11	-4.204362816823750E-06	-6.669285163540690E-07
A12	3.543034386581930E-06	-4.660355900720310E-07
			A13	-6.214370187641160E-07	3.147355448837110E-08
A14	3.521633581929570E-07	-3.240798354869540E-08
			A15	9.882874685174850E-08	1.183964750105940E-09
A16	-2.159738495273670E-08	3.265878614453200E-09
			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 in the third example is shown in fig. 7. As can be seen from the astigmatism diagrams in fig. 7, it is apparent that the camera module 11 in the third example can satisfactorily correct various aberrations with a small size to obtain good optical performance.

[ fourth example ]

Next, a fourth example in which a specific numerical value is applied to the camera module 11 shown in fig. 8 will be described.

In the fourth example, the imaging lens assembly 21 includes, in order from the object side toward the imaging surface S side, a first lens L1 having positive refractive power with a convex surface toward the object side, a second lens L2 having negative refractive power with a concave surface toward the imaging surface S side, a third lens L3 having positive refractive power with a convex surface toward the object side, a fourth lens L4 having negative refractive power, a fifth lens L5 having positive refractive power, and a sixth lens L6 having negative refractive power with a concave surface toward the imaging surface S side. The aperture stop 3 is disposed on the imaging surface S side with respect to the vertex of the first surface of the first lens L1 and on the object side with respect to the second surface of the first lens L1.

Table 13 shows lens data of the fourth example. Table 14 shows the focal length of each lens and the combined focal length fs of the lenses from the lens disposed on the most object side to the negative-refractive-power lens disposed on the most object side. In the example of table 14, fs is the combined focal length of the first lens L1 and the second lens L2. Table 15 shows the focal length F, F-number Fno, angle of view 2 ω, total length Σ d of the imaging lens assembly obtained when an object point is photographed at infinity, lens length Σ Ld, flange distance FB, image height Yh of the entire system, and values corresponding to the conditional expressions. Table 16 shows the aspherical coefficients of the imaging lens assembly 21.

Watch 13

Si	Ri	Di	Nd	νd
					1 (virtual surface)		1.00E+10
2 (aperture diaphragm)	1.00E+18	-0.438
					3 (L1 st surface)	5.610	1.955	1.5439	56.07
4 (L1 surface 2)	-94.781	0.100
					5 (L2 surface 1)	61.836	0.343	1.6349	23.97
6 (L2 surface 2)	8.061	0.761
					7 (L3 surface 1)	6.799	1.169	1.5350	55.73
8 (L3 surface 2)	18.309	1.356
					9 (L4 surface 1)	-13.118	0.731	1.6349	23.97
10 (L4 surface 2)	-22.484	0.686
					11 (L5 surface 1)	32.344	0.898	1.6349	23.97
12 (L5 surface 2)	-111.815	1.102
					13 (L6 surface 1)	3.558	0.777	1.5350	55.73
14 (L6 surface 2)	2.467	3.694
					15 (optical Filter)	1.00E+18	0.220	1.5168	64.20
16 (image plane)		0.300

TABLE 14

Lens and lens assembly	Focal length
		L1	9.82
L2	-14.63
		L3	19.56
L4	-51.15
		L5	39.61
L6	-20.04
		fs	22.64

Watch 15

f	13.01
		Fno	2.08
2ω	46.60
		∑d	14.09
∑Ld	10.41
		FB	3.68
Yh	5.80
		FB/Yh	0.63
∑Ld/∑d	0.74
		∑d/f	1.08
fs/f	1.74
		Fno/Yh	0.36

TABLE 16

	S3 (L1 surface 1)	S4 (L1 surface 2)	S5 (L2 surface 1)
				R	5.610414694285750E+00	-9.478078484525570E+01	6.183602050397920E+01
K	0.000000000000000E+00	0.000000000000000E+00	-1.000000000000000E+01
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-1.030466995830030E-03	-6.053079129698070E-04	4.069727765995530E-04
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-6.187053565919240E-05	-3.059944129714630E-05	-9.610818617957380E-05
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	1.359729802261180E-06	-1.615509134959570E-05	-1.624867225589740E-05
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	-5.220222936569110E-07	8.154473576837390E-07	1.230991109986150E-06
				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

	S6(L2Surface 2)	S7 (L3 surface 1)	S8 (L3 surface 2)
				R	8.060534436998860E+00	6.798813171985340E+00	1.830899611800240E+01
K	-4.725508332707000E+00	0.000000000000000E+00	0.000000000000000E+00
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-1.726062693183110E-04	-2.575841540225340E-03	-2.244102600604670E-03
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-1.291432212206670E-04	2.600187503164630E-05	-5.764405976224520E-05
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	-9.624513511004070E-07	5.404306374825380E-06	7.196182163118750E-06
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	3.148755010164620E-07	3.415003110358090E-07	-6.822601499342000E-08
				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 (L4 surface 1)	S10 (L4 surface 2)	S11 (L5 surface 1)
				R	-1.311809998958340E+01	-2.248424773745540E+01	3.234416822430570E+01
K	0.000000000000000E+00	0.000000000000000E+00	-1.000000000000000E+01
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-3.362788716021000E-04	3.259882670716770E-06	-1.283098232510310E-03
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-1.777711631933170E-05	-3.749685448727790E-05	-3.398200983846650E-04
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	-3.434614277247120E-06	-1.086536136266010E-06	6.979501453009950E-06
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	-1.970308127553390E-07	6.744133139598070E-08	-3.381736532169020E-06
				A11	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A12	-4.070088126954600E-09	6.195905503755970E-09	0.000000000000000E+00
				A13	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A14	8.265065710507890E-10	1.367335071238780E-10	0.000000000000000E+00
				A15	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A16	6.237037357697140E-11	-2.442354221821370E-11	0.000000000000000E+00
				A17	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A18	-1.242339336097840E-11	6.809511518149140E-12	0.000000000000000E+00
				A19	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A20	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00

	S12 (L5 surface 2)	S13 (L6 surface 1)	S14 (L6 surface 2)
				R	-1.118148108918630E+02	3.557532358335650E+00	2.467016462414470E+00
K	-3.427271445856000E+00	-9.058246374816000E-01	-3.877443356251000E+00
				A3	0.000000000000000E+00	0.000000000000000E+00	-1.267991018756300E-02
A4	-4.490321888539960E-03	-3.475685779776400E-02	2.018494029626550E-02
				A5	0.000000000000000E+00	0.000000000000000E+00	-4.279399874572910E-02
A6	6.612248689404550E-04	3.134375039850520E-03	2.871910717348930E-02
				A7	0.000000000000000E+00	0.000000000000000E+00	-9.827881508768980E-03
A8	-9.606817866297160E-05	-1.841949030262010E-04	1.883003380132900E-03
				A9	0.000000000000000E+00	0.000000000000000E+00	-1.945342829340240E-04
A10	2.793291771392320E-06	3.436407996445710E-06	8.480284659621530E-06
				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

The aberration in the fourth example is shown in fig. 9. As can be seen from the aberration diagrams of fig. 9, it is apparent that the camera module 11 in the fourth example can satisfactorily correct various aberrations with a small size to obtain good optical performance.

[ fifth example ]

Next, a fifth example in which a specific numerical value is applied to the camera module 11 shown in fig. 10 will be described.

In the fifth example, the imaging lens assembly 21 includes, in order from the object side toward the imaging surface S side, a first lens L1 having positive refractive power with a convex surface toward the object side, a second lens L2 having negative refractive power with a concave surface toward the imaging surface S side, a third lens L3 having positive refractive power with a convex surface toward the object side, a fourth lens L4 having positive refractive power, and a fifth lens L5 having negative refractive power with a concave surface toward the imaging surface S side. The aperture stop 3 is disposed on the imaging surface S side with respect to the vertex of the first surface of the first lens L1 and on the object side with respect to the second surface of the first lens L1.

Table 17 shows lens data of the fifth example. Table 18 shows the focal length of each lens and the combined focal length fs from the lens disposed on the most object side to the lens of the negative refractive power lens disposed on the most object side. In the example of table 18, fs is the combined focal length of the first lens L1 and the second lens L2. Table 19 shows the focal length F, F-number Fno, angle of view 2 ω, total length Σ d of the imaging lens assembly obtained when an object point is photographed at infinity, lens length Σ Ld, flange distance FB, image height Yh of the entire system, and values corresponding to the conditional expressions. Table 20 shows the aspherical coefficients of the imaging lens assembly 21.

TABLE 17

Si	Ri	Di	Nd	vd
					1 (virtual surface)		1.00E+10
2 (aperture diaphragm)	1.00E+18	-0.3478
					3 (L1 surface 1)	4.553	1.428	1.544	56.07
4 (L1 surface 2)	-66.086	0.093
					5 (L2 surface 1)	64.635	0.464	1.635	23.97
6 (L2 surface 2)	6.307	0.598
					7 (L3 surface 1)	5.393	0.985	1.535	55.73
8 (L3 surface 2)	12.571	1.985
					9 (L4 surface 1)	-18.498	0.892	1.635	23.97
10 (L4 surface 2)	-12.595	0.788
					11 (L5 surface 1)	2.904	0.672	1.535	55.73
12 (L5 surface 2)	1.990	2.963
					13 (optical Filter)	1.00E+18	0.210	1.517	64.20
14 (image plane)		0.300

Watch 18

Lens and lens assembly	Focal length
		L1	7.90
L2	-11.04
		L3	16.87
L4	58.72
		L5	-15.92
fs	19.78

Watch 19

f	10.66
		Fno	2.24
2ω	45.26
		∑d	11.38
∑Ld	8.31
		FB	3.07
Yh	4.60
		FB/Yh	0.67
∑Ld/∑d	0.73
		∑d/f	1.07
fs/f	1.85
		Fno/Yh	0.49

Watch 20

	S3 (L1 surface 1)	S4 (L1 surface 2)	S5 (L2 surface 1)
				R	4.552862551417140E+00	-6.608599088557810E+01	6.463481423203610E+01
K	0.000000000000000E+00	0.000000000000000E+00	-1.000000000000000E+01
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-1.937866835295020E-03	-1.223870883684040E-03	6.776091180720090E-04
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-1.620015741947140E-04	-9.554904309776210E-05	-3.574781940758630E-04
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	1.515935839181470E-05	-8.390353544038090E-05	-8.401959214784020E-05
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	-4.893996911208110E-06	6.932532320411610E-06	1.097174772031690E-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

	S6 (L2 surface 2)	S7 (L3 surface 1)	S8 (L3 surface 2)
				R	6.306875892590400E+00	5.392510247204890E+00	1.257110381284520E+01
K	-4.725508332707000E+00	0.000000000000000E+00	0.000000000000000E+00
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-1.545276816182570E-04	-5.408419208594880E-03	-4.182161540504750E-03
				A5	0.000000000000000E+00	0 month 00000000000000E +00	0.000000000000000E+00
A6	-3.665998341603050E-04	1.2290132g2087090E-04	-2.160645170669820E-04
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	1.445601078022600E-07	2.929199010147280E-05	3.192822274238880E-05
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	2.330181328336730E-06	1.470623046865290E-06	2.310260725895220E-07
				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 (L4 surface 1)	S10 (L4 surface 2)	S11 (L5 surface 1)
				R	-1.849780992913930E+01	-1.259533070370760E+01	2.904401269556930E+00
K	-1.000000000000000E+01	-3.427271445856000E+00	-9.058246374816000E-01
				A3	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A4	-2.063650912769420E-03	-8.935486050507290E-03	-6.738012633678480E-02
				A5	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A6	-1.086279535748830E-03	2.386218196630840E-03	9.874765307964980E-03
				A7	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A8	5.908336323430520E-05	-4.698853691497900E-04	-9.563459591480250E-04
				A9	0.000000000000000E+00	0.000000000000000E+00	0.000000000000000E+00
A10	-2.587933533823080E-05	2.402199446359280E-05	3.149270964386900E-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
				A1 5	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 (L5 surface 2)
		R	1.990494547920140E+00
K	-3.877443356251000E+00
		A3	-2.118129621906380E-02
A4	4.230370072747820E-02
		A5	-1.086948386136910E-01
A6	9.152532793627450E-02
		A7	-3.948017699978830E-02
A8	9.539589501342980E-03
		A9	-1.243187863591240E-03
A10	6.859258217907770E-05
		A11	0.000000000000000E+00
A12	0.000000000000000E+00
		A13	0.000000000000000E+00
A14	0.000000000000000E+00
		A15	0.000000000000000E+00
A16	0.000000000000000E+00
		A17	0.000000000000000E+00
A18	0.000000000000000E+00
		A1g	0.000000000000000E+00
A20	0.000000000000000E+00

The aberration in the fifth example is shown in fig. 11. As can be seen from the aberration diagram of fig. 11, it is apparent that the camera module 11 in the fifth example can satisfactorily correct various aberrations with a small size to obtain good optical performance.

In describing embodiments of the present disclosure, it will be understood that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "interior," "exterior," "clockwise" and "counterclockwise" should be construed to refer to the orientation or position as then described or illustrated in the drawing under discussion. These relative terms are used merely to simplify the description of the present disclosure and do not indicate or imply that the referenced devices or elements must have a particular orientation or must be constructed or operated in a particular orientation. Accordingly, these terms should not be used to limit the present 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, nor are they intended to imply a number of the indicated technical features. Thus, features defined as "first" and "second" may include one or more of the features. In the description of the present disclosure, "plurality" means "two or more" unless otherwise specified.

In the description of the embodiments of the present disclosure, unless specified or limited otherwise, the terms "mounted," "connected," "coupled," and the like are used broadly and can be, for example, a fixed connection, a detachable connection, or an integral connection; mechanical or electrical connections are also possible; or may be directly connected or indirectly connected through intervening structures; or internal communication of the two elements as would be understood by one skilled in the art as the case may be.

In embodiments of the present disclosure, unless otherwise specified or limited, a structure in which a first feature is "on" or "under" a second feature may include an embodiment in which the first feature is in direct contact with the second feature, and may also include an embodiment in which the first feature and the second feature are not in direct contact with each other but are in contact with additional features formed therebetween. Further, a first feature "on," "above," or "atop" a second feature may include embodiments in which the first feature is "on," "above," or "atop" the second feature orthogonally or obliquely, or simply means that the height of the first feature is greater than the height of the second feature; and a first feature being "under," "beneath," or "under" a second feature may include embodiments in which the first feature is "under," "beneath," or "under" the second feature, either orthogonally or obliquely, or simply means that the height of the first feature is less than the height of the second feature.

Various embodiments and examples are provided in the above description to achieve different configurations of the present disclosure. Certain elements and arrangements are described above to simplify the present disclosure. However, these elements and arrangements are merely exemplary and are not intended to limit the present disclosure. Further, reference numbers and/or drawing letters may be repeated in different examples of the disclosure. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations. Further, the present disclosure provides examples of different processes and materials. However, one skilled in the art will appreciate that other processes and/or materials may be applied.

Reference throughout this specification to "one embodiment," "some embodiments," "an example embodiment," "an example," "a specific example," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Thus, the appearances of the foregoing phrases or examples throughout this specification are not necessarily referring to the same embodiment or example of the 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 flow diagram or otherwise described herein may be understood as one or more modules, segments, or portions of code which include executable instructions for implementing specific logical functions or steps in the process. The scope of the preferred embodiments of the present disclosure includes other implementations in which one skilled in the art would understand that functions may be implemented in sequences other than those shown or discussed, including substantially the same sequences or in reverse sequences.

The logic and/or steps shown in the flowcharts and/or otherwise described herein may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions, for example, by executing the instructions with the instruction execution system, apparatus, or device. In the context of this specification, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples of the computer readable medium include, but are not limited to: an electronic connection (electronic device) having one or more wires, a portable computer peripheral (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Further, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via, for instance, optical scanning of the paper or other suitable medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that each of the portions of the present disclosure can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if the steps or methods are implemented in hardware, also in another embodiment, the steps or methods may be implemented by one or a combination of the following techniques known in the art: a discrete logic circuit having a logic gate circuit for realizing a logic function of a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or a portion of the steps of the above-described exemplary methods of the present disclosure may be implemented using program command-related hardware. The program may be stored in a computer readable storage medium and when run on a computer includes a combination of one or more steps of a method embodiment of the disclosure.

Furthermore, each functional unit of the embodiments of the present disclosure may be integrated in one processing module, or these units may be separate physical entities, or two or more units are integrated in one processing module. The integration module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as a separate product, the integrated module may be stored in a computer-readable storage medium.

The storage medium may be a read-only memory, a magnetic disk, a CD, etc.

While embodiments of the present disclosure have been shown and described, it will 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 changes, modifications, substitutions and alterations to the embodiments may be made without departing from the scope of the present disclosure.

Claims (11)

1. An imaging lens assembly, comprising:

at least two lenses having positive refractive power; and

at least two lenses having negative refractive power, wherein

The lens disposed on the most imaging surface side has an aspherical shape with an inflection point,

a total length of the imaging lens assembly and a distance from a lens arranged on the most imaging surface side to an imaging surface are configured to vary between a photographing state and a lens storage state, the total length of the imaging lens assembly being a distance from a vertex of an object side surface of a lens arranged on the most object side to the imaging surface on an optical axis, and

the imaging lens assembly satisfies the following conditional expression in the photographing state:

FB/Yh≥0.5，

ΣLd/Σd≤0.75，

wherein FB is a distance from an imaging surface side edge of the lens arranged on the most imaging surface side to the imaging surface, yh is an image height, Σ Ld is a distance from a vertex of an object side surface of the lens arranged on the most object side to the imaging surface side edge of the lens arranged on the most imaging surface side in the optical axis direction, and Σ d is a total length of the imaging lens assembly.

2. Imaging lens assembly according to claim 1, wherein the full length of the imaging lens assembly and the distance from the lens arranged at the most imaging surface side to the imaging surface are shorter in the lens storage state than in the photographing state.

3. The imaging lens assembly of claim 1, wherein the imaging lens assembly further satisfies the following conditional expression in the photographing state:

0.9<∑d/f<1.2，

where f is the focal length of the entire optical system.

4. The imaging lens assembly of claim 1, wherein the imaging lens assembly further satisfies the following conditional expression:

0.9<fs/f<1.9，

wherein fs is a composite focal length of lenses from the lens disposed on the most object side to the negative refractive power lens disposed on the most object side.

5. The imaging lens assembly of claim 1, wherein the imaging lens assembly further satisfies the following conditional expression:

0.2<Fno/Yh<0.9，

where Fno is the F number.

6. Imaging lens assembly according to claim 1, wherein the lens arranged at the most imaging surface side is a lens having negative refractive power.

7. The imaging lens assembly according to claim 1, wherein a surface on the imaging surface side of the lens arranged on the most imaging surface side is concave in the vicinity of the optical axis and convex in a peripheral portion.

8. Imaging lens assembly according to claim 1, wherein the lens arranged at the most imaging surface side is formed of plastic.

9. A camera module, comprising:

the imaging lens assembly of any one of claims 1-8; and

an image sensor comprising the imaging surface.

10. The camera module of claim 9, further comprising an IR filter disposed between the imaging lens assembly and the image sensor.

11. An image forming apparatus comprising:

a camera module according to any one of claims 9 and 10; and

a housing for storing the imaging lens assembly.

Images