Imaging lens assembly, camera module and imaging device

Abstract

An imaging lens assembly (21) comprising a mirror (31) rotatable about one end (31a), at least one lens (L1, L3, L4, L7) having positive refractive power, at least one lens (L2, L5, L6) having negative refractive power, and a reflecting member disposed between a lens (L7) disposed closest to an imaging surface (S) and the imaging surface (S), wherein the mirror (31) is tilted at a first angle (01) in a storage mirror state so that most of incident light incident on the mirror (31) is reflected in a direction deviated from the lens (32), and is tilted at a second angle (02) in a shooting state so that most of the incident light incident on the mirror (31) is reflected toward the lens (32) to form an optical path (OA1) optically connecting the mirror (31), the lens (32), and the reflecting member (33), and the imaging lens assembly (21) is configured so that: 0.5 < ΣLd / Σd < 0.8, Mh x 2 > 7.0 mm, Yh > 6.5 mm.

Description

Technical Field

[0001] This disclosure relates to an imaging lens assembly, camera module, and imaging device, and more specifically, to a compact imaging lens assembly, camera module, and imaging device that can guarantee good optical performance. Background Technology

[0002] In recent years, portable imaging devices such as mobile phones and digital cameras have been widely used. With the miniaturization of these devices, the imaging lens assemblies mounted on them also need to be reduced in size. To meet this miniaturization requirement, traditional imaging lens assemblies use prisms on the object side of the lens group to ensure a longer focal length within a limited space.

[0003] However, in traditional imaging lens assemblies, the volume of the prism mounted on the imaging device is limited by the thickness of the imaging device. Due to the volume limitation of the prism, it is difficult for the prism to obtain a sufficient reflective area and collect a sufficient amount of light.

[0004] Therefore, for small imaging devices with long focal lengths, it is difficult to capture bright images that require a sufficient amount of light using imaging lens assemblies with large apertures and large image sensors.

[0005] Furthermore, in traditional imaging devices, because the image sensor is positioned perpendicular to the optical axis of the imaging lens assembly, it is difficult to install a large image sensor due to the limited thickness of the imaging device.

[0006] Therefore, it is difficult for small imaging devices to capture bright images using large image sensors. Summary of the Invention

[0007] This disclosure aims to solve at least one of the aforementioned technical problems. Therefore, this disclosure requires providing an imaging lens assembly, a camera module, and an imaging device.

[0008] According to this disclosure, the imaging lens assembly includes:

[0009] A mirror that can rotate around one end of the mirror's imaging surface;

[0010] At least one lens disposed on the imaging surface side of the reflector and having positive refractive power;

[0011] At least one lens disposed on the imaging plane side of the reflector and having negative refractive power, and,

[0012] A reflective member is disposed between the lens closest to the imaging surface and the imaging surface, wherein...

[0013] The reflector is configured, in its stored state, to be tilted at a first angle relative to the optical axis direction of a first optical axis, such that most of the incident light incident on the reflector is reflected in a direction deviating from the lens. The first optical axis is part of the optical axis of the imaging lens assembly and is positioned between the reflector and the reflecting member. The reflector is further configured, in its shooting state, to be tilted at a second angle greater than the first angle relative to the optical axis direction, such that most of the incident light incident on the reflector is reflected toward multiple lenses to form an optical path optically connecting the reflector, lenses, and reflecting member.

[0014] The imaging lens assembly is configured such that:

[0015] 0.5 < ΣLd / Σd < 0.8,

[0016] Mh×2>7.0mm,

[0017] Yh>6.5mm,

[0018] Wherein, ΣLd is the distance on the optical axis of the imaging lens assembly from the mirror to the surface of the lens closest to the imaging surface, Σd is the distance on the optical axis of the imaging lens assembly from the mirror to the imaging surface, Mh is the effective height of the mirror at the intersection of the optical axis and the mirror, and Yh is the image height.

[0019] In one example, the imaging lens assembly can also be configured such that:

[0020] Yh / Σd<0.2.

[0021] In one example, the imaging lens assembly can also be configured such that:

[0022] Σd / f<2.5,

[0023] Where f is the focal length of the imaging lens assembly.

[0024] In one example, the imaging lens assembly can also be configured such that:

[0025] BF / Yh < 3.0,

[0026] Wherein, BF is the distance on the optical axis of the imaging lens assembly from the surface of the lens closest to the imaging surface to the imaging surface.

[0027] In one example, the imaging lens assembly can also be configured such that:

[0028] Fno / Mh<0.5,

[0029] Where Fno is the F-number of the imaging lens assembly.

[0030] In one example, the imaging lens assembly can also be configured such that:

[0031] Yh / f < 0.35.

[0032] In one example, the lens positioned closest to the imaging plane can have positive refractive power.

[0033] In one example, the lenses may, from the object side, sequentially include: a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, a sixth lens with negative refractive power, and a seventh lens with positive refractive power.

[0034] In one example, the reflecting element could be a prism.

[0035] According to this disclosure, the camera module includes:

[0036] Imaging lens assembly; and

[0037] An image sensor including an imaging surface that is parallel to the optical axis of a first optical axis and perpendicular to the optical axis of a second optical axis, the second optical axis being the remaining portion of the optical axis of the imaging lens assembly and positioned between the reflective member and the imaging surface.

[0038] In one example, the camera module may also include an IR filter positioned between the imaging lens assembly and the image sensor.

[0039] According to this disclosure, the imaging device includes:

[0040] Camera module;

[0041] The housing used to store the imaging lens assembly, and

[0042] A drive mechanism that rotates around one end of the reflector to drive the reflector.

[0043] In one example, the reflector can be configured to be stored inside the housing in a mirror storage state, and can be configured to have the other end of the reflector protrude from the surface of the housing in a shooting state. Attached Figure Description

[0044] These and / or other aspects and advantages of the embodiments of this disclosure will become apparent and more readily understood from the following detailed description with reference to the accompanying drawings, in which:

[0045] Figure 1A The diagram of the camera module according to this disclosure shows an imaging lens assembly in a mirror-like configuration.

[0046] Figure 1BThe diagram of the camera module according to this disclosure shows the imaging lens assembly in the shooting state;

[0047] Figure 2A The diagram of the imaging apparatus according to this disclosure shows the imaging apparatus in a mirror-carrying state;

[0048] Figure 2B The diagram of the imaging device according to this disclosure shows the imaging device in the shooting state;

[0049] Figure 3 This is a diagram illustrating an example of a drive mechanism;

[0050] Figure 4 It is a configuration diagram of a camera module according to the first example of this disclosure;

[0051] Figure 5 It is an aberration diagram of a camera module according to the first example of this disclosure;

[0052] Figure 6 This is a configuration diagram of a camera module according to the second example of this disclosure;

[0053] Figure 7 It is an aberration diagram of a camera module according to the second example of this disclosure;

[0054] Figure 8 It is a configuration diagram of the camera module according to the third example of this disclosure;

[0055] Figure 9 It is an aberration map of a camera module according to the third example of this disclosure;

[0056] Figure 10 It is a configuration diagram of the camera module according to the fourth example of this disclosure; and

[0057] Figure 11 It is an aberration map of a camera module according to the fourth example of this disclosure. Detailed Implementation

[0058] Embodiments of this disclosure will be described in detail, and examples of embodiments will be shown in the accompanying drawings. Throughout the description, the same or similar elements and elements having the same or similar functions are indicated by the same reference numerals. The embodiments described herein with reference to the accompanying drawings are illustrative and intended to illustrate this disclosure, and should not be construed as limiting this disclosure.

[0059] <Summary of this disclosure>

[0060] First, a summary of this disclosure will be described. The camera module to which this disclosure applies is a compact configuration with a movable (foldable) reflector, and a camera module that improves image brightness. Specifically, as... Figure 1A and Figure 1B As shown, the imaging lens assembly 21 of the camera module 11 includes a mirror 31, a plurality of lenses 32, and a reflecting member 33. The plurality of lenses 32 includes at least one lens with positive refractive power and at least one lens with negative refractive power.

[0061] The mirror 31 can rotate around one end 31a of the imaging surface S side of the mirror 31.

[0062] Multiple lenses 32 are arranged on the imaging surface S side of the reflector 31.

[0063] A reflecting member 33 is disposed between a lens and the imaging surface S, which is positioned closest to the imaging surface S. The reflecting member 33 includes a reflecting surface 33a that reflects incident light, which is incident from the object (object side) onto the imaging surface S via a reflecting mirror 31 and a plurality of lenses 32. The reflecting member 33 is, for example, a prism or a reflecting mirror. In the following description, the reflecting member 33 is a prism.

[0064] exist Figure 1A and Figure 1B In the diagram, the dotted line represents the optical axis OA of camera module 11 (this also applies below).

[0065] like Figure 1A and Figure 1B As shown, the optical axis OA of the camera module 11 includes a first optical axis OA1 and a second optical axis OA2. The first optical axis OA1 is a part of the optical axis OA and is located between the reflecting surface 33a of the reflector 31 and the prism 33. The second optical axis OA2 is the remaining part of the optical axis OA and is located between the reflecting surface 33a of the prism 33 and the imaging surface S.

[0066] The first optical axis OA1 and the second optical axis OA2 are continuous at the intersection point 33b with the prism 33.

[0067] like Figure 1A As shown, in the storage mirror state where the reflector 31 is completely stored in the housing of the camera module 11, the reflector 31 is configured to be tilted at a first angle θ1 relative to the optical axis direction D1 of the first optical axis OA1 of the imaging lens assembly 21, such that most of the incident light incident on the reflector 31 is reflected in a direction deviating from the plurality of lenses 32. That is, when the reflector 31 is tilted at the first angle θ1, the incident light incident on the reflector 31 from the object side is not reflected exactly towards the plurality of lenses 32, and therefore is not imaged exactly onto the imaging plane S.

[0068] On the other hand, such as Figure 1BAs shown, in the shooting state of the object (recorded as an image), the reflector 31 is configured to be tilted relative to the optical axis direction D1 at a second angle θ2 greater than the first angle θ1, such that most of the incident light incident on the reflector 31 is reflected toward the multiple lenses 32 to form an optical path connecting the reflector 31, the multiple lenses 32, and the prism 33. That is, with the reflector 31 tilted at the second angle θ2, the incident light incident on the reflector 31 from the object side is reflected exactly toward the multiple lenses 32 side, and the incident light is reflected exactly to the imaging surface S side via the multiple lenses 32 and the reflecting surface 33a of the prism 33, and is exactly imaged onto the imaging surface S.

[0069] More specifically, during the transition from the storage mirror state to the shooting state, the mirror 31 is configured to rotate about one end 31a toward the lens 32 until the mirror 31 tilts at a second angle θ2.

[0070] During the transition from shooting mode to mirror storage mode, mirror 31 is configured to rotate about one end 31a toward the side opposite to the plurality of lenses 32 until mirror 31 tilts at a first angle θ1.

[0071] like Figure 2A and Figure 2B As shown, the camera module 11 is housed inside the housing 4 to form an imaging device. Figure 2A and Figure 2B As shown, multiple lenses 32 are held in the cylinder 26.

[0072] like Figure 2A As shown, in the stored state, the reflector 31 is completely stored in the housing 4 together with the light-transmitting cover 5, which covers the reflector 31 from the object side. To store the reflector 31 within the confined space of the housing 4, the reflector 31 is tilted at a first angle θ1 relative to the optical axis direction D1. From the perspective of suppressing the thickness T of the housing 4, the first angle θ1 is preferably less than, for example, 45°.

[0073] like Figure 2B As shown, when a predetermined user operation is performed to switch from the mirror storage state to the shooting state, the camera module 11 switches from the mirror storage state to the shooting state.

[0074] During the transition from the mirror storage state to the shooting state, the camera module 11 drives the mirror 31 and cover plate 5 stored in the housing 4 in a direction extending from the surface 4a of the housing 4 using the drive mechanism 24. At this time, the drive mechanism 24 rotates the mirror 31 until it tilts relative to the optical axis direction D1 at a second angle θ2. From the viewpoint of capturing a bright image while suppressing the thickness T of the housing 4, the second angle θ2 is preferably 45°. The second angle θ2 can be between 42° and 48°. In the shooting state, a portion of the other end 31b of the mirror 31 extends from the surface 4a of the housing 4.

[0075] The drive mechanism 24 may include an actuator such as a motor. For example, such as... Figure 3 As shown, the drive mechanism 24 may include a spring 241, a rotation limiting member 242, and a motor 243, such as a voice coil motor. The spring 241 applies an elastic force to the reflector 31, causing the reflector 31 to rotate clockwise in the direction D2. Figure 3 In the example shown, the rotation limiting member 242 is a rod-shaped member extending from the lower surface of the upper wall portion 51 of the cover plate 5 towards the reflector 31. The rotation limiting member 242 restricts the rotation of the reflector 31 by abutting against the reflector 31. The motor 243 drives the cover plate 5 along the thickness direction D3 of the housing 4. Specifically, during the switch from the reflector storage state to the shooting state, the motor 243 raises the cover plate 5 along the thickness direction D3. As the cover plate 5 rises, the rotation limiting member 242 fixed to the cover plate 5 also rises. As the rotation limiting member 242 rises, the reflector 31 rotates clockwise in the direction D2 under the elastic force of the spring 241 until the reflector 31 tilts at a second angle θ2.

[0076] The drive mechanism 24 can have a fully mechanical configuration that does not require electrical control, such as springs and cams.

[0077] On the other hand, when a predetermined user operation is performed to switch from shooting mode to mirror storage mode, camera module 11 switches from shooting mode to mirror storage mode.

[0078] During the switch from shooting mode to mirror storage mode, the drive mechanism 24 retracts the cover plate 5 and mirror 31 and stores them in the housing 4. At this time, the drive mechanism 24 rotatably drives the mirror 31 until it tilts relative to the optical axis direction D1 at a first angle θ1. Figure 3 In the example shown, motor 243 lowers cover plate 5 along thickness direction D3 during the switch from shooting state to mirror storage state. As cover plate 5 descends, rotation limiting member 242 fixed to cover plate 5 also descends. As rotation limiting member 242 descends, mirror 31 rotates counterclockwise direction D4 until mirror 31 tilts at a first angle θ1.

[0079] For example, the camera module 11 to which this disclosure is applied is configured as follows: Figure 4 , Figure 6 , Figure 8 and Figure 10 As shown.

[0080] Camera module 11 includes an imaging lens assembly 21, a filter 22, and an image sensor 23. The imaging lens assembly 21 includes a mirror 31, multiple lenses 32, and a prism 33. The multiple lenses 32 include at least one lens with positive refractive power and at least one lens with negative refractive power. The multiple lenses 32 have a large diameter suitable for the large-size image sensor 23 and are designed to maintain their good optical performance.

[0081] Prism 33 reflects incident light from the object (object side) to filter 22 and image sensor 23 via mirror 31 and lens 32. Imaging lens assembly 21 may include multiple prisms (or mirrors). In this case, incident light from the object (object side) may be reflected multiple times by multiple prisms (or mirrors) before being incident on filter 22 and image sensor 23.

[0082] Image sensor 23 is, for example, a solid-state image sensor such as a complementary metal-oxide-semiconductor (CMOS) or charge-coupled device (CCD). Image sensor 23 has an imaging surface S, which is the imaging surface of imaging lens assembly 21. Image sensor 23 is configured such that imaging surface S is parallel to the optical axis direction of the first optical axis OA1 and perpendicular to the optical axis direction of the second optical axis OA2. The optical axis direction of the second optical axis OA2 is equal to the thickness direction D3 of housing 4. Image sensor 23 receives incident light from the object (object side) via imaging lens assembly 21 and filter 22, performs photoelectric conversion on the light, and outputs the image data obtained by photoelectric conversion of the light to subsequent stages. Filter 22, disposed between imaging lens assembly 21 and image sensor 23, can be, for example, an infrared (IR) filter that blocks infrared light from the incident light.

[0083] As described above, the camera module 11 with a movable reflector 31 on the object side of the plurality of lenses 32 enables the reflective area of ​​the reflector 31, which serves as the light-capturing area, to be greater than that of a conventional immovable prism while suppressing the thickness T of the housing 4.

[0084] Therefore, a small imaging device with a long focal length and a small thickness T can capture bright images by using an imaging lens assembly 21 with a large diameter and a large imaging sensor 23 suitable for a reflector 31 with a large reflective area.

[0085] Furthermore, the camera module 11 with a prism 33 on the imaging surface S side of the multiple lenses 32 allows for the placement of a larger image sensor 23 within the housing 4 while suppressing the thickness T of the housing 4.

[0086] Therefore, a small imaging device with a small thickness T can capture bright images by using a large image sensor 23.

[0087] The above configuration of camera module 11 can be selectively combined with the following configurations represented by formulas (1) to (8).

[0088] When the camera module 11 satisfies the following formulas (1) to (3), the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively:

[0089] 0.5 < ΣLd / Σd < 0.8 (1)

[0090] Mh × 2 > 7.0 mm (2)

[0091] Yh > 6.5 mm (3)

[0092] In formula (1), ΣLd is the distance from the reflector 31 to the surface of the lens closest to the imaging surface S on the optical axis OA of the imaging lens assembly 21, and Σd is the distance from the reflector 31 to the imaging surface S on the optical axis OA of the imaging lens assembly 21 (the same applies below). In formula (2), Mh is the intersection point 31C of the first optical axis OA1 and the reflector 31 (see...). Figure 1B The effective height at ( ) (also applies below). For example Figure 1B As shown, the effective height of the reflector 31 is the height of light L at the intersection point 31c, where light L is reflected from the reflector 31 and incident on the multiple lenses 32. In formula (3), Yh is the image height (the same applies below).

[0093] If the value of ΣLd / Σd deviates from the range of formula (1), it is difficult to miniaturize the imaging lens assembly 21 and to maintain its good optical performance.

[0094] If the value of 2Mh is lower than the lower limit of formula (2), the increased light collection by using the movable reflector 31 becomes insufficient.

[0095] If the value of Yh is lower than the lower limit of formula (3), it is difficult to fully utilize the advantage of image sensor 23, which is to configure image sensor 23 such that the imaging surface S is parallel to the first optical axis OA1, thereby allowing for an increase in the size of image sensor 23.

[0096] When the camera module 11 satisfies the following formula (4), the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively:

[0097] Yh / Σd < 0.2 (4)

[0098] If the value of Yh / Σd exceeds the upper limit of formula (4), it will be difficult to miniaturize the imaging lens assembly 21 and maintain good optical performance.

[0099] When the camera module 11 satisfies the following formula (5), the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively:

[0100] Σd / f < 2.5 (5).

[0101] In formula (5), f is the focal length of the imaging lens assembly 21 (the same applies below).

[0102] If the value of Σd / f exceeds the upper limit of formula (5), it is difficult to miniaturize the imaging lens assembly 21 and to maintain its good optical performance.

[0103] When the camera module 11 satisfies the following formula (6), the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively:

[0104] BF / Yh < 3.0 (6).

[0105] In formula (6), BF is the distance from the surface of the lens closest to the imaging surface S to the optical axis OA of the imaging lens assembly 21 on the imaging surface S (the same applies below).

[0106] If the value of BF / Yh exceeds the upper limit of formula (6), it will be difficult to miniaturize the imaging lens assembly 21 and maintain its good optical performance.

[0107] When the camera module 11 satisfies the following formula (7), the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively:

[0108] Fno / Mh < 0.5 (7)

[0109] In formula (7), Fno is the F-number of the imaging lens assembly 21 (the same applies below).

[0110] If the value of Fno / Mh exceeds the upper limit of formula (7), it will be difficult to miniaturize the imaging lens assembly 21 and maintain its good optical performance.

[0111] When the camera module 11 satisfies the following formula (8), the imaging lens assembly 21 can be miniaturized and its good optical performance can be maintained more effectively:

[0112] Yh / f < 0.35 (8).

[0113] If the value of Yh / f exceeds the upper limit of formula (8), it will be difficult to miniaturize the imaging lens assembly 21 and maintain its good optical performance.

[0114] The lens positioned closest to the imaging plane S can have positive refractive power.

[0115] Furthermore, considering the formation of the lens, it is preferable that the aspherical lenses in the imaging lens assembly 21, particularly aspherical lenses with an aspherical shape having an inflection point, are formed of plastic material. Regarding the plurality of lenses constituting the imaging lens assembly 21, lenses having a size equal to or smaller than a specific dimension are preferably formed of plastic material, while lenses larger than a specific dimension are preferably formed of glass material. This is because it is difficult to form aspherical lenses or relatively small lenses using materials other than plastic.

[0116] Such a camera module 11, including an imaging lens assembly 21, can be used in compact digital devices (imaging devices) such as mobile phones, wearable cameras, and surveillance cameras.

[0117] <Camera Module Configuration Example>

[0118] Next, a more specific example of applying this disclosure will be described. In the following example, "Si" represents the sequence number of the i-th surface, increasing sequentially from the object side to the imaging surface S side. The optical element of the corresponding surface is represented by the corresponding surface number "Si". "First surface" or "1st surface" represents the object-side surface of the lens, while "second surface" or "2nd surface" represents the surface on the imaging surface S side of the lens. "Pr surface" represents the reflecting surface 33a of prism 33. "R" represents the center radius of curvature of the surface (mm). "E+i" with respect to "R" represents an exponential expression with base 10, i.e., "10 i For example, "1.00E+18" means "1.00 × 10". 18 This exponential expression also applies to the aspherical coefficients described later. "Di" represents the distance (mm) between the i-th and (i+1)-th surfaces on the optical axis. "Ndi" represents the refractive index of the material of the optical element with the i-th surface at the d-line (587.6 nm wavelength). "νdi" represents the Abbe number of the material of the optical element with the i-th surface at the d-line.

[0119] The imaging lens assembly 21 used in the following example includes a lens with an aspherical surface. The aspherical shape of the lens is defined by the following formula (9):

[0120] Z = C × h 2 / {1 + (1 - K × C 2 × h 2 ) 1 / 2} + ΣAn × h n (9),

[0121] Where n is an integer greater than or equal to 3.

[0122] In formula (8), Z is the depth of the aspherical 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 conic constant (second-order aspherical coefficient), and An is the nth-order aspherical coefficient.

[0123] [First Example]

[0124] The first example will be described, where specific numerical values ​​are applied... Figure 4 In the camera module 11 shown.

[0125] In the first example, the imaging lens assembly 21 includes, in order from the object side to the imaging plane S side: a mirror 31, a first lens L1 with positive refractive power and convex surface facing the object side, a second lens L2 with negative refractive power and concave surface facing the imaging plane S side, a third lens L3 with positive refractive power and convex surface facing the object side, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with negative refractive power, a seventh lens L7 with positive refractive power and convex surface facing the imaging plane S side, and a prism 33 with a reflecting surface 33a. An aperture stop 34 is disposed between the third lens L3 and the fourth lens L4.

[0126] Table 1 shows the lens data for the first example. The units for lengths or distances shown in the following tables are mm. Table 2 shows the focal length of each lens. Table 3 shows the focal length f, F-number Fno, angle of view 2ω, total length ΣD of the imaging lens assembly 21 when photographing an object at infinity, distance ΣLd from the mirror 31 to the surface of the lens closest to the imaging surface S on the optical axis OA of the imaging lens assembly 21, back focal length BF, image height Yh, and effective height Mh of the mirror 31. Table 4 shows the values ​​corresponding to the conditional expressions. Table 5 shows the aspherical coefficients of the imaging lens assembly 21.

[0127] Table 1

[0128] 1 (Reflector) 7.000 2(L1 First Surface) 12.812 2.405 1.5439 56.07 3 (L1 second surface) 15.756 0.089 4 (L2 first surface) 9.959 1.991 1.6503 21.51 5 (L2 second surface) 7.035 1.234 6 (L3 first surface) 15.939 3.849 1.5439 56.07 7 (L3 Second Surface) 65.159 0.446 8 (Aperture Stop) 2.009 9 (L4 first surface) 12.154 3.982 1.5350 55.73 10 (L4 Second Surface) -27.048 0.089 11 (L5 First Surface) 145.604 1.672 1.6503 21.51 12 (L5 Second Surface) 80.530 0.995 13 (L6 First Surface) -17.559 0.995 1.5350 55.73 14 (L6 Second Surface) 17.307 1.797 15 (L7 First Surface) -25.104 4.200 1.6349 23.97 16 (L7 Second Surface) -22.948 8.021 17 (Pr side) 6.650 18 (Filter) 0.385 1.5168 64.20 19 (Filters) 0.299 20 (Image plane)

[0129] Table 2

[0130] L1 98.04 L2 -50.33 L3 37.80 L4 16.28 L5 -279.88 L6 -16.16 L7 239.56

[0131] Table 3

[0132] Fno 2.72 2ω 20.65 ∑d 48.11 ∑Ld 32.76 BF 15.35 Yh 7.00 Mh 7.83

[0133] Table 4

[0134] Mh*2>7.0 15.65 Yh > 6.5 7.00 Yh / ∑D<0.2 0.15 ∑d / f<2.5 1.40 BF / Yh < 3.0 2.19 Fno / Mh < 0.5 0.35 Yh / f < 0.35 0.20

[0135] Table 5

[0136]

[0137]

[0138]

[0139] The aberrations of the first example are as follows: Figure 5 As shown. Figure 5 Examples of aberrations are shown: spherical aberration, astigmatism (field curvature), and distortion. Each of these aberration diagrams shows the aberration with the d-line (587.56 nm) as the reference wavelength. The spherical aberration diagrams also show aberrations relative to the g-line (435.84 nm) and the C-line (656.27 nm). In the diagrams showing astigmatism, "S" represents the aberration value on the sagittal plane, and "T" represents the aberration value on the meridional plane. "IMGHT" indicates image height. These also apply to the aberration diagrams in the other examples.

[0140] from Figure 5 As can be seen from the aberration diagram, it is clear that the camera module 11 in the first example, despite its small size, can satisfactorily correct various aberrations to achieve excellent optical performance.

[0141] [Second Example]

[0142] Next, the second example will be described, in which specific numerical values ​​are applied... Figure 6 In the camera module 11 shown.

[0143] like Figure 6 As shown, in the second example, the imaging lens assembly 21 includes a mirror 31, first lenses L1 to seventh lenses L7, and a prism 33 having a reflective surface 33a. An aperture stop 34 is disposed between the third lens L3 and the fourth lens L4.

[0144] The lens parameters corresponding to those in the first example are shown in Tables 6-10.

[0145] Table 6

[0146] 1 (Reflector) 7.000 2(L1 First Surface) 13.403 2.366 1.5439 56.07 3 (L1 second surface) 16.411 0.140 4 (L2 first surface) 10.085 2.065 1.6503 21.51 5 (L2 second surface) 7.387 1.575 6 (L3 first surface) 21.213 3.922 1.5439 56.07 7 (L3 Second Surface) 84.638 0.287 8 (Aperture Stop) 6.542 9 (L4 first surface) 11.197 4.192 1.5350 55.73 10 (L4 Second Surface) -28.899 0.140 11 (L5 First Surface) 95.931 1.860 1.6503 21.51 12 (L5 Second Surface) 52.307 0.625 13 (L6 First Surface) -21.316 1.137 1.5350 55.73 14 (L6 Second Surface) 17.140 1.775 15 (L7 First Surface) -38.797 5.369 1.6349 23.97 16 (L7 Second Surface) -32.971 8.021 17 (Pr side) 6.650 18 (Filter) 0.385 1.5168 64.20 19 (Filters) 0.299 20 (Image plane)

[0147] Table 7

[0148] L1 105.41 L2 -60.77 L3 51.00 L4 15.68 L5 -179.88 L6 -17.61 L7 254.66

[0149] Table 8

[0150] Fno 2.67 2ω 19.47 ∑d 54.35 ∑Ld 38.99 BF 15.35 Yh 7.00 Mh 9.15

[0151] Table 9

[0152] Mh*2>7.0 18.30 Yh > 6.5 7.00 Yh / ∑D<0.2 0.13 ∑d / f<2.5 1.55 BF / Yh < 3.0 2.19 Fno / Mh < 0.5 0.29 Yh / f < 0.35 0.20

[0153] Table 10

[0154]

[0155]

[0156]

[0157] The aberrations in the second example are as follows Figure 7 As shown. According to the second example, by making the lens parameters different from those in the first example, the same effect as the first example can be obtained, while also increasing the degree of freedom in designing the camera module 11 according to this disclosure.

[0158] [Third Example]

[0159] Next, the third example will be described, in which specific numerical values ​​are applied... Figure 8 In the camera module 11 shown.

[0160] like Figure 8 As shown, in the third example, the imaging lens assembly 21 includes a mirror 31, first lenses L1 to seventh lenses L7, and a prism 33 having a reflective surface 33a. An aperture stop 34 is disposed between the third lens L3 and the fourth lens L4.

[0161] The lens parameters corresponding to those in the first example are shown in Tables 11-15.

[0162] Table 11

[0163] 1 (Reflector) 7.000 2(L1 First Surface) 13.417 2.394 1.5439 56.07 3 (L1 second surface) 16.464 0.140 4 (L2 first surface) 10.385 2.015 1.6503 21.51 5 (L2 second surface) 7.623 1.575 6 (L3 first surface) 21.985 4.393 1.5439 56.07 7 (L3 Second Surface) 79.137 2.463 8 (Aperture Stop) 5.562 9 (L4 first surface) 11.678 4.881 1.5350 55.73 10 (L4 Second Surface) -24.978 0.140 11 (L5 First Surface) 228.689 2.179 1.6503 21.51 12 (L5 Second Surface) 47.043 0.201 13 (L6 First Surface) -22.566 1.446 1.5350 55.73 14 (L6 Second Surface) 17.239 2.625 15 (L7 First Surface) -21.874 2.800 1.6349 23.97 16 (L7 Second Surface) -20.352 8.021 17 (Pr side) 6.650 18 (Filter) 0.385 1.5168 64.20 19 (Filters) 0.299 20 (Image plane)

[0164] Table 12

[0165] L1 104.56 L2 -61.87 L3 54.57 L4 15.62 L5 -91.49 L6 -18.07 L7 260.71

[0166] Table 13

[0167] Fno 2.86 2ω 19.22 ∑d 55.17 ∑Ld 39.81 BF 15.35 Yh 7.00 Mh 9.85

[0168] Table 14

[0169] Mh*2>7.0 19.70 Yh > 6.5 7.00 Yh / ∑D<0.2 0.13 ∑d / f<2.5 1.43 BF / Yh < 3.0 2.19 Fno / Mh < 0.5 0.29 Yh / f < 0.35 0.18

[0170] Table 15

[0171]

[0172]

[0173]

[0174] The aberrations in the third example are as follows: Figure 9 As shown. According to the third example, by making the lens parameters different from those in the first and second examples, the same effect as in the first example can be achieved while increasing the degree of freedom in designing the camera module 11 according to this disclosure.

[0175] [Fourth Example]

[0176] Next, the fourth example will be described, in which specific numerical values ​​are applied... Figure 10 In the camera module 11 shown.

[0177] like Figure 10 As shown, in the fourth example, the imaging lens assembly 21 includes a mirror 31, first lenses L1 to seventh lenses L7, and a prism 33 having a reflective surface 33a. An aperture stop 34 is disposed between the third lens L3 and the fourth lens L4.

[0178] The lens parameters corresponding to those in the first example are shown in Tables 16-20.

[0179] Table 16

[0180] 1 (Reflector) 7.393 2(L1 First Surface) 14.218 2.313 1.5439 56.07 3 (L1 second surface) 17.212 0.148 4 (L2 first surface) 11.286 2.295 1.6503 21.51 5 (L2 second surface) 8.326 1.664 6 (L3 first surface) 29.402 7.780 1.5439 56.07 7 (L3 Second Surface) -982.370 0.224 8 (Aperture Stop) 1.217 9 (L4 first surface) 12.164 6.080 1.5350 55.73 10 (L4 Second Surface) -47.613 0.148 11 (L5 First Surface) 27.545 3.025 1.6503 21.51 12 (L5 Second Surface) 22.332 0.346 13 (L6 First Surface) -33.742 1.548 1.5350 55.73 14 (L6 Second Surface) 18.525 1.792 15 (L7 First Surface) -45.467 1.725 1.6349 23.97 16 (L7 Second Surface) -21.044 8.471 17 (Pr side) 7.024 18 (Filter) 0.407 1.5168 64.20 19 (Filters) 0.316 20 (Image plane)

[0181] Table 17

[0182] L1 118.28 L2 -69.50 L3 52.70 L4 18.81 L5 -235.18 L6 -22.16 L7 57.68

[0183] Table 18

[0184] Fno 2.31 2ω 20.51 ∑d 53.92 ∑Ld 37.70 BF 16.22 Yh 7.39 Mh 8.93

[0185] Table 19

[0186] Mh*2>7.0 17.87 Yh > 6.5 7.39 Yh / ∑D<0.2 0.14 ∑d / f<2.5 2.14 BF / Yh < 3.0 2.19 Fno / Mh < 0.5 0.26 Yh / f < 0.35 0.29

[0187] Table 20

[0188]

[0189]

[0190]

[0191] The aberrations in the fourth example are as follows Figure 11 As shown. According to the fourth example, by making the lens parameters different from those in the first to third examples, the same effect as in the first example can be obtained, while also increasing the degree of freedom in designing the camera module 11 according to this disclosure.

[0192] In the description of embodiments of this disclosure, it should be understood that terms such as “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “top,” “bottom,” “front,” “back,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” should be interpreted as referring to directions or positions as described or shown in the accompanying drawings discussed. These related terms are used merely to simplify the description of this disclosure and do not indicate or imply that the mentioned devices or elements must have a particular orientation, or must be constructed or operated in a particular orientation. Therefore, these terms should not constitute a limitation of this disclosure.

[0193] Furthermore, the terms such as “first” and “second” used herein for descriptive purposes are not intended to indicate or imply relative importance or significance, or to imply the number of technical features indicated. Therefore, a feature defined as “first” and “second” may include one or more of those features. In the description of this disclosure, unless otherwise stated, “a plurality” means “two or more”.

[0194] In the description of embodiments of this disclosure, terms such as “installation,” “connection,” “coupled,” etc. are used extensively and, unless otherwise specified or limited, can refer to, for example, a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection via an intermediate structure; or internal communication between two elements that can be understood by those skilled in the art based on the specific circumstances.

[0195] In embodiments of this disclosure, unless otherwise specified or limited, the structure of the first feature "on" or "below" the second feature may include embodiments in which the first feature and the second feature are in direct contact, or embodiments in which the first feature and the second feature are not in direct contact with each other, but are in contact through an additional feature formed between them. Furthermore, the term "on," "above," or "top" the second feature may include embodiments in which the first feature is orthogonally or obliquely positioned on, above, or "top" the second feature, or simply means that the first feature is at a height higher than the second feature; while the term "below," "below," or "bottom" the second feature may include embodiments in which the first feature is orthogonally or obliquely positioned below, below, or "bottom" the second feature, or simply means that the first feature is at a height lower than the second feature.

[0196] Various embodiments and examples have been provided in the foregoing description to implement different structures of this disclosure. To simplify this disclosure, certain elements and arrangements have been described above. However, these elements and arrangements are merely examples and are not intended to limit this disclosure. Furthermore, reference numerals may be repeated in different examples of this disclosure. Such repetition is for the purpose of simplification and clarity, and does not indicate a relationship between different embodiments and / or arrangements. In addition, examples of different processes and materials are provided in this disclosure. However, those skilled in the art should understand that other processes and / or materials may also be applied.

[0197] Throughout this specification, references to "embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" mean that a particular feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this disclosure. Therefore, the appearance of these phrases throughout this specification does not necessarily refer to the same embodiment or example of this disclosure. Furthermore, in one or more embodiments or examples, specific features, structures, materials, or characteristics may be combined in any suitable manner.

[0198] Any process or method described in the flowchart or otherwise herein can be understood as including one or more modules, segments, or portions of code comprising executable instructions for implementing specific logical functions or steps in the process, and the scope of preferred embodiments of this disclosure includes other implementations, wherein those skilled in the art will understand that functionality may be implemented in an order different from that shown or discussed, including in substantially the same sequence or the reverse sequence.

[0199] The logic and / or steps otherwise described herein or shown in the flowcharts, such as a specific sequence list of executable instructions for implementing logical functions, may be embodied in any computer-readable medium that will be used by, or in conjunction with, an instruction execution system, instruction execution apparatus, or instruction execution device (e.g., a computer-based system, a processor-integrated system, or other system capable of obtaining instructions from an instruction execution system, instruction execution apparatus, or instruction execution device that executes instructions). For the purposes of this specification, "computer-readable medium" can be any means suitable for including, storing, communicating, propagating, or transmitting a program that will be used by, or in combination with, an instruction execution system, instruction execution apparatus, or instruction execution device. Further specific examples of computer-readable media include, but are not limited to: electronic connections (electronic devices) with one or more wires, portable computer peripherals (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because, for example, when a program needs to be obtained electronically, it can be optically scanned onto the paper or other suitable medium, then edited, decrypted, or processed using other suitable methods, and then the program can be stored in computer memory.

[0200] It should be understood that each part of this disclosure can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in memory and executed by an appropriate instruction execution system. For example, if implemented in hardware, similarly in another embodiment, the steps or methods can be implemented by one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0201] Those skilled in the art will understand that all or part of the steps in the exemplary methods described above can be implemented by instructing related hardware using programs. These programs can be stored in a computer-readable storage medium, and when run on a computer, they include one or a combination of the steps in the method embodiments of this disclosure.

[0202] Furthermore, each functional unit in the embodiments of this disclosure can be integrated into a processing module, or these units can be separate physical entities, or two or more units can be integrated into a single processing module. The integrated module can be implemented in hardware or as a software functional module. When the integrated module is implemented as a software functional module and sold or used as a standalone product, the integrated module can be stored in a computer-readable storage medium.

[0203] The aforementioned storage media can be read-only memory, disk, CD, etc.

[0204] Although embodiments of the present disclosure have been shown and described, those skilled in the art will understand that these embodiments are illustrative and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and variations may be made in the embodiments without departing from the scope of the present disclosure.

Claims

1. An imaging lens assembly, comprising: The mirror is rotatable about one end of the mirror's imaging surface. At least one lens disposed on the imaging surface side of the reflector and having positive refractive power; At least one lens disposed on the imaging surface side of the reflector and having negative refractive power; as well as A reflective member is disposed between the lens closest to the imaging surface and the imaging surface, wherein... The imaging lens assembly is housed within a housing with a light-transmitting cover that covers the reflector from the object side, with the imaging surface side opposite the object side. The reflector is configured such that, in its stored state, it tilts at a first angle relative to the optical axis direction by descending along the thickness direction of the housing with the light-transmitting cover, such that most of the incident light incident on the reflector is reflected in a direction deviating from the lens. The first optical axis is part of the optical axis of the imaging lens assembly and is positioned between the reflector and the reflecting member. Furthermore, in its shooting state, the reflector is configured such that, by rising along the thickness direction of the housing with the light-transmitting cover, it tilts at a second angle greater than the first angle relative to the optical axis direction, such that most of the incident light incident on the reflector is reflected toward a plurality of lenses to form an optical path optically connecting the reflector, the plurality of lenses, and the reflecting member. The thickness direction is perpendicular to the optical axis direction. The imaging lens assembly is configured such that: 0.5 < ΣLd / Σd < 0.8, Mh × 2 > 7.0 mm, Yh>6.5 mm, Yh / Σd < 0.2, Wherein, ΣLd is the distance from the reflector to the surface of the lens closest to the imaging surface on the optical axis of the imaging lens assembly, Σd is the distance from the reflector to the imaging surface on the optical axis of the imaging lens assembly, Mh is the effective height of the reflector at the intersection of the optical axis and the reflector, and Yh is the image height.

2. The imaging lens assembly according to claim 1, further configured such that: Σd / f < 2.5, in, f is the focal length of the imaging lens assembly.

3. The imaging lens assembly according to claim 1, further configured such that: BF / Yh < 3.0, in, BF is the distance from the surface of the lens closest to the imaging surface to the imaging surface on the optical axis of the imaging lens assembly.

4. The imaging lens assembly according to claim 1, further configured such that: Fno / Mh < 0.5, in, Fno is the F-number of the imaging lens assembly.

5. The imaging lens assembly according to claim 1, further configured such that: Yh / f < 0.

35.

6. The imaging lens assembly according to claim 1, wherein, The lens positioned closest to the imaging surface has positive refractive power.

7. The imaging lens assembly according to claim 1, wherein, The plurality of lenses, arranged sequentially from the object side, include: The first lens with positive refractive power A second lens with negative refractive power. A third lens with positive refractive power. The fourth lens has positive refractive power. The fifth lens has negative refractive power. A sixth lens with negative refractive power, and The seventh lens has positive refractive power.

8. The imaging lens assembly according to claim 1, wherein, The reflecting component is a prism.

9. A camera module, comprising: Imaging lens assembly according to any one of claims 1-8; as well as An image sensor including an imaging surface, the imaging surface being parallel to the optical axis of the first optical axis and perpendicular to the optical axis of the second optical axis, the second optical axis being the remaining portion of the optical axis of the imaging lens assembly and being positioned between the reflective member and 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 imaging device, comprising: The camera module according to claim 9 or 10; The housing for storing the imaging lens assembly, and A drive mechanism that rotates the reflector about one end of the reflector.

12. The imaging device according to claim 11, wherein, The reflector is configured to be stored inside the housing in the stored reflector state, and is configured such that in the shooting state, the other end of the reflector extends from the surface of the housing.

Images