Optical image acquisition lens, imaging device and electronic device

Abstract

An optical image acquisition lens, an image capturing device and an electronic device are disclosed. The optical image acquisition lens includes eight lenses. The eight lenses are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The eight lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. The image side surface of the eighth lens is concave at a vicinity of an optical axis. At least one of the object side surface and the image side surface of at least one lens in the optical image acquisition lens has at least one inflection point at an off-axis position. When certain conditions are met, the optical image acquisition lens can simultaneously meet the requirements of wide viewing angle, miniaturization and high imaging quality. The present application also discloses an image capturing device having the above optical image acquisition lens and an electronic device having the image capturing device.

Description

Technical Field

[0001] The present invention relates to an optical image acquisition lens, an imaging device and an electronic device, and in particular to an optical image acquisition lens and an imaging device suitable for electronic devices. Background Art

[0002] As semiconductor process technology becomes more advanced, the performance of electronic photosensitive devices has been improved, and pixels can reach smaller sizes. Therefore, optical lenses with high imaging quality have become an indispensable part.

[0003] With the rapid advancement of technology, the application range of electronic devices equipped with optical lenses has become wider and wider, and the requirements for optical lenses have also become more diverse. Because previous optical lenses have not been easy to strike a balance between image quality, sensitivity, aperture size, size, or viewing angle, the present invention provides an optical lens to meet these requirements. Summary of the Invention

[0004] The present invention provides an optical image capture lens, an imaging device, and an electronic device. The optical image capture lens comprises eight lenses arranged sequentially along a light path from the object side to the image side. When certain conditions are met, the optical image capture lens provided by the present invention can simultaneously meet the requirements of wide viewing angle, miniaturization, and high imaging quality.

[0005] The present invention provides an optical image acquisition lens comprising eight lenses. The eight lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The eight lenses respectively have an object side surface facing the object side and an image side surface facing the image side. The first lens has negative refractive power. The second lens has positive refractive power, and the object side surface of the second lens is convex near the optical axis. The sixth lens has negative refractive power. The image side surface of the eighth lens is concave near the optical axis. At least one of the object side surface and the image side surface of at least one lens in the optical image acquisition lens has at least one inflection point off-axis. The Abbe number of the second lens is V2, the Abbe number of the sixth lens is V6, the Abbe number of the eighth lens is V8, the curvature radius of the image side surface of the sixth lens is R12, the focal length of the optical image acquisition lens is f, and it satisfies the following conditions:

[0006] 30.0 <V2+V6+V8<85.0;以及

[0007] 0<|R12 / f|<3.0.

[0008] The present invention further provides an optical image acquisition lens comprising eight lenses. The eight lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The eight lenses respectively have an object side surface facing the object side and an image side surface facing the image side. The first lens has negative refractive power. The object side surface of the second lens is convex near the optical axis. The sixth lens has negative refractive power. The image side surface of the eighth lens is concave near the optical axis. At least one of the object side surface and the image side surface of at least one lens in the optical image acquisition lens has at least one inflection point off-axis. The Abbe number of the second lens is V2, the Abbe number of the sixth lens is V6, the Abbe number of the eighth lens is V8, the thickness of the second lens on the optical axis is CT2, and the distance between the third lens and the fourth lens on the optical axis is T34, which satisfies the following conditions:

[0009] 30.0 <V2+V6+V8<85.0;以及

[0010] 2.7 <CT2 / T34<50。

[0011] The present invention further provides an optical image capture lens comprising eight lenses. The eight lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses each have an object-side surface facing the object side and an image-side surface facing the image side. The second lens has positive refractive power. The eighth lens has negative refractive power, the object-side surface of the eighth lens is convex near the optical axis, and the image-side surface of the eighth lens is concave near the optical axis. At least one of the object-side surface and the image-side surface of at least one lens in the optical image capture lens has at least one inflection point off-axis. The Abbe number of the second lens is V2, the Abbe number of the sixth lens is V6, the Abbe number of the eighth lens is V8, the distance between the first lens and the second lens on the optical axis is T12, the distance between the sixth lens and the seventh lens on the optical axis is T67, the distance between the seventh lens and the eighth lens on the optical axis is T78, the thickness of the sixth lens on the optical axis is CT6, and the thickness of the eighth lens on the optical axis is CT8, which satisfy the following conditions:

[0012] 20.0 <V2+V6+V8<90.0;

[0013] 1.0 <T12 / (T67+T78);以及

[0014] 0 <CT8 / CT6<2.0。

[0015] The present invention provides an imaging device, which includes the aforementioned optical image capturing lens and an electronic photosensitive device, wherein the electronic photosensitive device is arranged on the imaging surface of the optical image capturing lens.

[0016] The present invention provides an electronic device, which includes the aforementioned imaging device.

[0017] In an embodiment of the present invention, when V2+V6+V8 meet the above conditions, the material configuration can be adjusted to correct aberrations such as chromatic aberration. When |R12 / f| meets the above conditions, the surface shape and refractive power of the sixth lens can be adjusted to correct aberrations. When CT2 / T34 meets the above conditions, the lens configuration can be adjusted to help increase the viewing angle and compress the volume of the object side of the optical image acquisition lens. When T12 / (T67+T78) meets the above conditions, the lens configuration can be adjusted to achieve a balance between viewing angle, volume configuration, and imaging quality. When CT8 / CT6 meets the above conditions, the lenses on the image side of the optical image acquisition lens can be coordinated with each other, helping to achieve a balance between volume and imaging surface size.

[0018] The above description of the content of the present invention and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the present invention, and to provide further explanation of the claims of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 FIG. 1 is a schematic diagram of an imaging device according to a first embodiment of the present invention.

[0021] Figure 2 From left to right are the spherical aberration, astigmatism, and distortion curves of the first embodiment.

[0022] Figure 3 FIG. 1 is a schematic diagram of an imaging device according to a second embodiment of the present invention.

[0023] Figure 4 From left to right are the spherical aberration, astigmatism, and distortion curves of the second embodiment.

[0024] Figure 5 FIG. 4 is a schematic diagram of an imaging device according to a third embodiment of the present invention.

[0025] Figure 6 From left to right are the spherical aberration, astigmatism, and distortion curves of the third embodiment.

[0026] Figure 7 FIG. 4 is a schematic diagram of an imaging device according to a fourth embodiment of the present invention.

[0027] Figure 8 From left to right sequentially are the spherical aberration, astigmatism and distortion curves of the fourth embodiment.

[0028] Figure 9 A schematic diagram of an image capturing device according to a fifth embodiment of the present application is shown.

[0029] Figure 10 From left to right sequentially are the spherical aberration, astigmatism and distortion curves of the fifth embodiment.

[0030] Figure 11 A schematic diagram of an image capturing device according to a sixth embodiment of the present application is shown.

[0031] Figure 12 From left to right sequentially are the spherical aberration, astigmatism and distortion curves of the sixth embodiment.

[0032] Figure 13 A schematic diagram of an image capturing device according to a seventh embodiment of the present application is shown.

[0033] Figure 14 From left to right sequentially are the spherical aberration, astigmatism and distortion curves of the seventh embodiment.

[0034] Figure 15 A schematic diagram of an image capturing device according to an eighth embodiment of the present application is shown.

[0035] Figure 16 From left to right sequentially are the spherical aberration, astigmatism and distortion curves of the eighth embodiment.

[0036] Figure 17 A perspective view of an image capturing device according to a ninth embodiment of the present application is shown.

[0037] Figure 18 A perspective view of one side of an electronic device according to a tenth embodiment of the present application is shown.

[0038] Figure 19 A perspective view of the other side of the electronic device of Figure 18 is shown.

[0039] Figure 20 A system block diagram of the electronic device of Figure 18 is shown.

[0040] Figure 21 A perspective view of one side of an electronic device according to an eleventh embodiment of the present application is shown.

[0041] Figure 22 A perspective view of one side of an electronic device according to a twelfth embodiment of the present application is shown.

[0042] Figure 23 A schematic diagram illustrating parameters Y11, Y81, Y82, Yc81, Yc82, as well as inflection points and critical points of each lens according to the first embodiment of the present invention is shown.

[0043] Figure 24 A schematic diagram illustrating a configuration relationship of an optical path deflection device in an optical image capturing lens according to the present invention is shown.

[0044] Figure 25 FIG. 4 is a schematic diagram illustrating another configuration relationship of the optical path deflection device in the optical image capturing lens according to the present invention.

[0045] Figure 26 A schematic diagram illustrating a configuration relationship of two optical path deflection devices in an optical image capturing lens according to the present invention is shown.

[0046] Figure Numbers

[0047] 1, 2, 3, 4, 5, 6, 7, 8, 100, 100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k, 100m, 100n, 100p…imaging device

[0048] 101…Imaging Lens

[0049] 102…Drive device

[0050] 103…Electronic photosensitive devices

[0051] 104…Image stabilization module

[0052] 200, 300, 400...electronic devices

[0053] 201, 301, 401... flash module

[0054] 202…Focus assist module

[0055] 203…Image Signal Processor

[0056] 204…Display module

[0057] 205…Image software processor

[0058] 206…Subject

[0059] C…critical point

[0060] P…inflection point

[0061] IM…Imaging Surface

[0062] OA1…First optical axis

[0063] OA2…Second optical axis

[0064] OA3…Third optical axis

[0065] LF…Optical path turning device

[0066] LF1…First optical path turning device

[0067] LF2…Second optical path turning device

[0068] LG... lens group

[0069] ST…Aperture

[0070] S1, S2… aperture

[0071] E1…First lens

[0072] E2…Second lens

[0073] E3…Third lens

[0074] E4…the fourth lens

[0075] E5…Fifth lens

[0076] E6…the sixth lens

[0077] E7…the seventh lens

[0078] E8…Eighth lens

[0079] E9...Filter device

[0080] IMG…imaging surface

[0081] IS…Electronic photosensitive device

[0082] Y11…The maximum effective radius of the object side surface of the first lens

[0083] Y81…The maximum effective radius of the object side surface of the eighth lens

[0084] Y82…The maximum effective radius of the image-side surface of the eighth lens

[0085] Yc81…The vertical distance between the critical point on the object side surface of the eighth lens and the optical axis

[0086] Yc82…The vertical distance between the critical point of the image-side surface of the eighth lens and the optical axis DETAILED DESCRIPTION

[0087] The optical image acquisition lens includes eight lenses, and the eight lenses are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses each have an object side surface facing the object side and an image side surface facing the image side.

[0088] The first lens can have a negative refractive power. In this way, the refractive power configuration of the optical image acquisition lens can be adjusted to increase the angle of view. The image side surface of the first lens can be concave at a vicinity of the optical axis. In this way, the surface shape and the refractive power of the first lens can be adjusted to increase the angle of view.

[0089] The second lens can have a positive refractive power. In this way, the volume of the object side end of the optical image acquisition lens can be compressed and the angle of view can be increased. The object side surface of the second lens can be convex at a vicinity of the optical axis. In this way, the first lens and the second lens can cooperate with each other to reduce surface reflection.

[0090] The sixth lens can have a negative refractive power. In this way, the refractive power of the image side end of the optical image acquisition lens can be balanced to correct aberrations such as spherical aberration.

[0091] The seventh lens can have a positive refractive power. In this way, the volume of the image side end of the optical image acquisition lens can be compressed.

[0092] The eighth lens can have a negative refractive power. In this way, the eighth lens and the seventh lens can cooperate with each other to balance the volume and the imaging quality. The object side surface of the eighth lens can be convex at a vicinity of the optical axis. In this way, the surface shape of the eighth lens can be adjusted to correct off-axis aberrations. The object side surface of the eighth lens can have at least one critical point at an off-axis position. In this way, the surface shape of the eighth lens can be adjusted to correct off-axis aberrations. The image side surface of the eighth lens is concave at a vicinity of the optical axis. In this way, the surface shape of the eighth lens can be adjusted to correct off-axis aberrations and to adjust the back focal length to compress the volume. The image side surface of the eighth lens can have at least one critical point at an off-axis position. In this way, the incident angle of light on the imaging surface can be adjusted to improve the peripheral illumination and the image quality of the imaging surface. The vertical distance between the critical point of the object side surface of the eighth lens and the optical axis is Yc81, and the maximum effective radius of the object side surface of the eighth lens is Y81. The object side surface of the eighth lens has at least one critical point at an off-axis position, which satisfies the following condition: 0.20 < Yc81 / Y81 < 0.90. In this way, the surface shape of the eighth lens can be further adjusted to correct aberrations. The vertical distance between the critical point of the image side surface of the eighth lens and the optical axis is Yc82, and the maximum effective radius of the image side surface of the eighth lens is Y82. The image side surface of the eighth lens can have at least one critical point at an off-axis position, which satisfies the following condition: 0.30 < Yc82 / Y82 < 0.90. In this way, the image quality can be further improved. Please refer to Figure 23, is a schematic diagram illustrating parameters Y81, Y82, Yc81 and Yc82 and the off-axis critical point C between the object-side surface and the image-side surface of the eighth lens E8 according to the first embodiment of the present invention. Figure 23 The critical points of the object-side surface and the image-side surface of the eighth lens in the first embodiment are illustrated for illustrative purposes. However, in addition to the aforementioned lens surfaces, other lens surfaces in various embodiments of the present invention may also have one or more critical points at off-axis locations.

[0093] According to the optical image acquisition lens disclosed in the present invention, at least one of the object-side surface and the image-side surface of at least one lens has at least one inflection point at an off-axis position; thereby, the degree of lens surface variation can be increased, which helps to correct aberrations and compress the lens volume. The optical image acquisition lens may also have at least two lenses whose object-side surface and the image-side surface have at least one inflection point at an off-axis position. Please refer to Figure 23 , is a schematic diagram illustrating the inflection points P of each lens at an off-axis position according to the first embodiment of the present invention.

[0094] The Abbe number of the second lens is V2, the Abbe number of the sixth lens is V6, and the Abbe number of the eighth lens is V8, which meet the following conditions: 20.0 <V2+V6+V8<90.0。借此,可调整材质配置,以修正色差等像差。其中,也可满足下列条件:30.0<V2+V6+V8<85.0。其中,也可满足下列条件:40.0<V2+V6+V8<80.0。

[0095] The radius of curvature of the image-side surface of the sixth lens element is R12, and the focal length of the optical image acquisition lens is f, which can satisfy the following conditions: 0 < |R12 / f| < 3.0. This allows adjustment of the surface shape and refractive power of the sixth lens element to correct aberrations. Furthermore, the following conditions can also be satisfied: 0 < |R12 / f| < 2.5. Furthermore, the following conditions can also be satisfied: 0.50 < |R12 / f| < 2.0. Furthermore, the following conditions can also be satisfied: 1.0 < |R12 / f| < 1.5.

[0096] The thickness of the second lens on the optical axis is CT2, and the distance between the third lens and the fourth lens on the optical axis is T34, which can meet the following conditions: 2.7 <CT2 / T34<50。借此,可调整透镜配置,有助于增大视角与压缩光学影像获取镜头物侧端的体积。其中,也可满足下列条件:3.0<CT2 / T34<35。

[0097] The distance between the first lens and the second lens on the optical axis is T12, the distance between the sixth lens and the seventh lens on the optical axis is T67, and the distance between the seventh lens and the eighth lens on the optical axis is T78, which can meet the following conditions: 1.0 <T12 / (T67+T78)。借此,可调整透镜配置,以在视角、体积配置与成像品质间取得平衡。其中,也可满足下列条件:1.5<T12 / (T67+T78)<50。其中,也可满足下列条件:2.0<T12 / (T67+T78)<35。

[0098] The thickness of the sixth lens on the optical axis is CT6, and the thickness of the eighth lens on the optical axis is CT8, which can meet the following conditions: <CT8 / CT6<2.0。借此,可使光学影像获取镜头像侧端的透镜相互配合,有助于在像侧端体积与成像面大小间取得平衡。其中,也可满足下列条件:0.50<CT8 / CT6<1.7。其中,也可满足下列条件:0.85<CT8 / CT6<1.5。

[0099] The thickness of the first lens on the optical axis is CT1, and the thickness of the third lens on the optical axis is CT3, which can meet the following conditions: 0.55 <CT1 / CT3<1.8。借此,可调整光学影像获取镜头物侧端的体积分布,并有助于增大视角。其中,也可满足下列条件:0.65<CT1 / CT3<1.6。

[0100] The curvature radius of the object side surface of the sixth lens is R11, and the focal length of the optical image acquisition lens is f, which can meet the following conditions: -0.90 <R11 / f<4.3。借此,可调整第六透镜的面形与屈折力,有助于修正像差与调整像侧端的体积分布。

[0101] The curvature radius of the image side surface of the sixth lens is R12, and the curvature radius of the object side surface of the seventh lens is R13, which can meet the following conditions: -3.0 <R12 / R13<0。借此,可使第六透镜与第七透镜相互配合,以修正畸变等像差。其中,也可满足下列条件:-2.3<R12 / R13<-0.10。

[0102] The sum of the distances between all adjacent lenses on the optical axis in an optical image acquisition lens is ΣAT, and the sum of the thicknesses of all lenses on the optical axis is ΣCT. These sums satisfy the following condition: 0.20 < ΣAT / ΣCT < 0.90. This allows for adjustment of lens configuration, helping to reduce overall length.

[0103] The maximum effective radius of the object side surface of the first lens is Y11, and the maximum effective radius of the image side surface of the eighth lens is Y82, which can meet the following conditions: 0.60 <Y11 / Y82<1.6。可调整透镜外径的比例,有助于在视角、体积分布与成像面大小间取得平衡。请参照 Figure 23 , is a schematic diagram illustrating parameters Y11 and Y82 according to the first embodiment of the present invention.

[0104] The focal length of the optical image acquisition lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, and the focal length of the eighth lens is f8, which can satisfy at least one of the following conditions: -0.90 <f / f1<-0.50;0.10<f / f2<0.50;|f / f3|<1.0;|f / f4|<1.0;|f / f5|<0.65;-1.0<f / f6<-0.10;0.50<f / f7<1.2;以及-1.0<f / f8<-0.10。借此,可调整光学影像获取镜头的屈折力分布,有助于增大视角、压缩体积与修正像差。

[0105] The focal length of the optical image acquisition lens is f, and the thickness of the fifth lens on the optical axis is CT5, which can meet the following conditions: 2.6 <f / CT5<6.5。借此,有助于平衡光学影像获取镜头物侧端与像侧端的体积分布。

[0106] The maximum absolute value of distortion within the maximum field of view of an optical image acquisition lens is |Dist|max, which can meet the following condition: |Dist|max < 10.0%. Controlling the magnitude of distortion helps achieve a balance between image quality and viewing angle. Furthermore, the following condition can also be met: |Dist|max < 8.0%.

[0107] The thickness of the second lens on the optical axis is CT2, and the thickness of the third lens on the optical axis is CT3, which can meet the following conditions: 0.75 <CT2 / CT3。借此,可使第二透镜与第三透镜相互配合,有助于增大视角与调整光学影像获取镜头物侧端的体积分布。其中,也可满足下列条件:0.90<CT2 / CT3<2.8。

[0108] The distance from the object side surface of the first lens to the image side surface of the eighth lens on the optical axis is TD, and the thickness of the eighth lens on the optical axis is CT8, which can meet the following conditions: 10.0 <TD / CT8<17.0。借此,可调整透镜配置,有助于压缩体积。

[0109] The distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, and the entrance pupil diameter of the optical image acquisition lens is EPD, which can meet the following conditions: 2.5 <TL / EPD<9.0。借此,可在总长与光圈大小间取得平衡。

[0110] The distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, and the focal length of the optical image acquisition lens is f, which can meet the following conditions: 2.5 <TL / f<5.0。借此,有助于在体积与视角间取得平衡。

[0111] The distance from the object side surface of the first lens to the imaging plane on the optical axis is TL, and the maximum imaging height of the optical image acquisition lens is ImgH (which can be half of the total diagonal length of the effective sensing area of ​​the electronic photosensitive device), which can meet the following conditions: 1.2 <TL / ImgH<2.6。借此,可在总长与成像面大小间取得平衡。

[0112] The focal length of the optical image acquisition lens is f, the focal length of the third lens is f3, the focal length of the fourth lens is f4, and the focal length of the fifth lens is f5, which can meet the following conditions: 0.50 <f / f3+f / f4+f / f5<1.6。借此,可使透镜的屈折力相互配合,有助于修正像差以及平衡光学影像获取镜头物侧端和像侧端的体积分布。

[0113] The focal length of the second lens is f2, and the thickness of the second lens on the optical axis is CT2, which can meet the following conditions: 4.0 <f2 / CT2<23。借此,可调整第二透镜的面形与屈折力,有助于压缩光学影像获取镜头物侧端的体积。

[0114] The focal length of the sixth lens is f6, and the thickness of the sixth lens on the optical axis is CT6, which can meet the following conditions: -20 <f6 / CT6<0。借此,可调整第六透镜的面形与屈折力,以修正像差。

[0115] The distance between the first and second lenses on the optical axis is T12, the distance between the second and third lenses on the optical axis is T23, the distance between the third and fourth lenses on the optical axis is T34, the distance between the fourth and fifth lenses on the optical axis is T45, the distance between the fifth and sixth lenses on the optical axis is T56, the distance between the sixth and seventh lenses on the optical axis is T67, and the distance between the seventh and eighth lenses on the optical axis is T78, which satisfies the following condition: 1.1 < (T12 + T23) / (T34 + T45 + T56 + T67 + T78) < 3.5. This allows the lens distribution to be adjusted, helping to achieve a balance between viewing angle and volume distribution.

[0116] The Abbe number of the first lens is V1, the Abbe number of the second lens is V2, the Abbe number of the third lens is V3, the Abbe number of the fourth lens is V4, the Abbe number of the fifth lens is V5, the Abbe number of the sixth lens is V6, the Abbe number of the seventh lens is V7, the Abbe number of the eighth lens is V8, the Abbe number of the i-th lens is Vi, the refractive index of the first lens is N1, the refractive index of the second lens is N2, the refractive index of the third lens is N3, the refractive index of the fourth lens is N4, the refractive index of the fifth lens is N5, the refractive index of the sixth lens is N6, the refractive index of the seventh lens is N7, the refractive index of the eighth lens is N8, the refractive index of the i-th lens is Ni, the minimum value of Vi / Ni is min(Vi / Ni), which can satisfy the following conditions: 5.0 <min(Vi / Ni)<12,其中i=1、2、3、4、5、6、7或8。借此,可调整光学影像获取镜头的材质分布配置,有助于压缩体积与修正像差。

[0117] The thickness of the fourth lens on the optical axis is CT4, the thickness of the fifth lens on the optical axis is CT5, the thickness of the sixth lens on the optical axis is CT6, the thickness of the seventh lens on the optical axis is CT7, and the thickness of the eighth lens on the optical axis is CT8. The distance between the fourth and fifth lenses on the optical axis is T45, the distance between the fifth and sixth lenses on the optical axis is T56, the distance between the sixth and seventh lenses on the optical axis is T67, and the distance between the seventh and eighth lenses on the optical axis is T78, which satisfies the following condition: 3.0 < (CT4 + CT5 + CT6 + CT7 + CT8) / (T45 + T56 + T67 + T78) < 20. This allows the lens distribution on the image side of the optical image acquisition lens to be adjusted, helping to reduce the image side volume.

[0118] The sum of the distances along the optical axis between all adjacent lenses in the optical image acquisition lens is ΣAT. The distance along the optical axis between the third and fourth lenses is T34, which satisfies the following condition: 8.50 < ΣAT / T34 < 120. This allows adjustment of the lens configuration to help balance the volume distribution between the object-side and image-side ends of the optical image acquisition lens. Furthermore, the following condition can also be satisfied: 9.50 < ΣAT / T34 < 110.

[0119] The thickness of the fifth lens on the optical axis is CT5, and the distance between the third lens and the fourth lens on the optical axis is T34, which can meet the following conditions: 2.0 <CT5 / T34<50。借此,可调整透镜配置,有助于在视角与体积分布间取得平衡。其中,也可满足下列条件:2.4<CT5 / T34<35。

[0120] The aperture value (F-number) of the optical image acquisition lens is Fno, which can meet the following conditions: 1.0 <Fno<2.4。借此,可在照度与景深需求之间取得平衡。其中,也可满足下列条件:1.2<Fno<2.0。

[0121] Half of the maximum viewing angle of the optical image acquisition lens is HFOV, which can meet the following conditions: 50.0 degrees <HFOV<80.0度。借此,可使光学影像获取镜头具有广视角的特性,并能避免因视角过大所产生的畸变等像差。

[0122] The focal length of the first lens is f1, and the focal length of the second lens is f2, which can meet the following conditions: -6.5 <f2 / f1<-1.5。借此,可使第一透镜与第二透镜相互配合,以修正球差等像差。

[0123] The focal length of the sixth lens element is f6, the focal length of the seventh lens element is f7, and the focal length of the eighth lens element is f8, satisfying the following condition: -7.5 < (f6 + f8) / f7 < -2.5. This allows for adjustment of the refractive power distribution at the image-side end of the optical image acquisition lens, helping to correct aberrations and compress the image-side volume.

[0124] The various technical features of the optical image acquisition lens disclosed in the present invention can be combined and configured to achieve corresponding effects.

[0125] In the optical image acquisition lens disclosed in the present invention, the material of the lens can be glass or plastic. If the material of the lens is glass, the degree of freedom of the configuration of the refractive power of the optical image acquisition lens can be increased, and the influence of the external ambient temperature change on the imaging can be reduced, and the glass lens can be made using techniques such as grinding or molding. If the material of the lens is plastic, the production cost can be effectively reduced. In addition, a spherical surface or an aspherical surface (ASP) can be set on the mirror surface, wherein the spherical lens can reduce the manufacturing difficulty, and if the aspherical surface is set on the mirror surface, more control variables can be obtained to eliminate aberrations, reduce the number of lenses, and effectively reduce the total length of the optical image acquisition lens of the present invention. Furthermore, the aspherical surface can be made by methods such as plastic injection molding or molded glass lens.

[0126] In the optical image acquisition lens disclosed in the present invention, if the lens surface is aspherical, it means that the entire optically effective area of ​​the lens surface or a portion thereof is aspherical.

[0127] In the optical image capture lens disclosed herein, additives can be selectively added to any one (or more) of the lens materials to produce light absorption or interference effects, thereby changing the lens's transmittance for light in specific wavelengths, thereby reducing stray light and color shift. For example, the additive can filter out light in the 600-800 nm wavelength range from the system to help reduce excess red or infrared light; or it can filter out light in the 350-450 nm wavelength range to reduce excess blue or ultraviolet light. Thus, the additive can prevent interference from light in specific wavelengths on imaging. Furthermore, the additive can be uniformly mixed into a plastic and fabricated into a lens using injection molding technology. Furthermore, the additive can also be applied as a coating on the lens surface to provide the aforementioned effects.

[0128] In the optical image capture lens disclosed in the present invention, if the lens surface is convex and the position of the convex surface is undefined, it means that the convex surface may be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is undefined, it means that the concave surface may be located near the optical axis of the lens surface. If the refractive power or focal length of the lens is not defined in its area, it means that the refractive power or focal length of the lens may be the refractive power or focal length of the lens at the near optical axis.

[0129] In the optical image capture lens disclosed herein, the inflection point of the lens surface refers to the intersection of the positive and negative changes in the curvature of the lens surface. The critical point of the lens surface refers to the point of tangency between a plane perpendicular to the optical axis and the lens surface, and the critical point is not located on the optical axis.

[0130] In the optical image capturing lens disclosed in the present invention, the imaging surface of the optical image capturing lens can be a plane or a curved surface with any curvature, particularly a curved surface with a concave surface facing the object side, depending on the corresponding electronic photosensitive device.

[0131] In the optical image capture lens disclosed herein, one or more imaging correction devices (such as flattening devices) can be optionally positioned between the lens closest to the imaging surface and the imaging surface in the imaging optical path to achieve image correction effects (such as image curvature). The optical properties of the imaging correction device, such as curvature, thickness, refractive index, position, and surface type (convex or concave, spherical or aspherical, diffraction, Fresnel, etc.), can be adjusted to suit the requirements of the imaging device. Generally speaking, a preferred imaging correction device configuration is a thin plano-concave device with a concave surface facing the object side, positioned near the imaging surface.

[0132] In the optical image acquisition lens disclosed in the present invention, at least one device with a function of deflecting the optical path, such as a prism or a reflector, can be selectively arranged on the imaging optical path between the object and the imaging surface to provide a more flexible spatial configuration of the optical image acquisition lens, so that the thinness and lightness of the electronic device are not restricted by the total optical length of the optical image acquisition lens. For further explanation, please refer to Figure 24 and Figure 25 ,in Figure 24 is a schematic diagram illustrating a configuration relationship of the optical path deflection device in an optical image acquisition lens according to the present invention, and Figure 25 FIG. 1 is a schematic diagram illustrating another configuration relationship of the optical path deflection device in the optical image acquisition lens according to the present invention. Figure 24 and Figure 25 As shown, the optical image acquisition lens can be arranged along an optical path from the object (not shown) to the imaging surface IM, and sequentially has a first optical axis OA1, an optical path turning device LF and a second optical axis OA2, wherein the optical path turning device LF can be as shown. Figure 24 As shown, it is set between the subject and the lens group LG of the optical image acquisition lens, or as Figure 25 The figure shows the lens group LG and the imaging surface IM of the optical image acquisition lens. Figure 26 , is a schematic diagram illustrating a configuration relationship of two optical path deflection devices in an optical image acquisition lens according to the present invention, such as Figure 26 As shown, the optical image acquisition lens can also be arranged along the optical path from the object (not shown) to the imaging surface IM, and has a first optical axis OA1, a first optical path turning device LF1, a second optical axis OA2, a second optical path turning device LF2 and a third optical axis OA3 in sequence, wherein the first optical path turning device LF1 is arranged between the object and the lens group LG of the optical image acquisition lens, and the second optical path turning device LF2 is arranged between the lens group LG of the optical image acquisition lens and the imaging surface IM, and the direction of travel of the light on the first optical axis OA1 can be as follows: Figure 26 The optical image acquisition lens can also be optionally equipped with three or more optical path turning devices. The present invention is not limited to the type, quantity and position of the optical path turning devices disclosed in the drawings.

[0133] The optical image acquisition lens disclosed in the present invention may include at least one aperture stop, which may be located before the first lens, between each lens, or after the last lens. The aperture stop, such as a glare stop or a field stop, can be used to reduce stray light and improve image quality.

[0134] The aperture of the optical image acquisition lens can be a front aperture or a middle aperture. The front aperture means that the aperture is arranged between the object and the first lens, and the middle aperture means that the aperture is arranged between the first lens and the imaging surface. If the aperture is a front aperture, the exit pupil and the imaging surface can have a long distance, so that the telecentric effect is achieved, and the efficiency of the CCD or CMOS receiving image of the electronic photosensitive device can be improved. If the aperture is a middle aperture, the field of view of the optical image acquisition lens can be expanded.

[0135] The variable aperture device can be a mechanical member or a light control device, which can control the size and shape of the aperture by electricity or electrical signal. The mechanical member can include movable members such as a blade group and a shielding plate, and the light control device can include shielding materials such as a filter device, an electrochromic material and a liquid crystal layer. The variable aperture device can improve the image adjustment capability by controlling the light amount or exposure time of the image. In addition, the variable aperture device can also be the aperture of the present application, which can adjust the image quality such as the depth of field and the exposure speed by changing the aperture value.

[0136] According to the above-mentioned embodiments, the following specific examples are described in detail with reference to the accompanying drawings.

[0137] <First embodiment>

[0138] Please refer to Figures 1 to 2 , wherein Figure 1 The schematic diagram of the image taking device according to the first embodiment of the present application is shown, Figure 2 The ball aberration, the astigmatism and the distortion curves of the first embodiment are sequentially shown from left to right. It can be known that Figure 1 The image taking device 1 includes an optical image acquisition lens (not labeled separately) and an electronic photosensitive device IS. The optical image acquisition lens sequentially includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a diaphragm S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter device E9 and an imaging surface IMG along the optical path from the object side to the image side. The electronic photosensitive device IS is arranged on the imaging surface IMG. The optical image acquisition lens includes eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there is no other interpolated lens between each lens.

[0139] The first lens E1 has a negative refractive power and is made of plastic. The object side surface thereof is a convex surface at the near optical axis, the image side surface thereof is a concave surface at the near optical axis, both surfaces thereof are aspheric surfaces, the object side surface thereof has a reverse point at the off-axis position, and the image side surface thereof has a reverse point at the off-axis position.

[0140] The second lens E2 has positive refractive power and is made of plastic material. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and the object-side surface has a point of inflection away from the optical axis.

[0141] The third lens E3 has negative refractive power and is made of plastic material. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, the object-side surface has a point of inflection away from the optical axis, and the image-side surface has a point of inflection away from the optical axis.

[0142] The fourth lens E4 has positive refractive power and is made of plastic material. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and the object-side surface has a point of inflection away from the optical axis.

[0143] The fifth lens E5 has negative refractive power and is made of plastic material. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, the image-side surface has a point of inflection away from the optical axis, and the image-side surface has a critical point away from the optical axis.

[0144] The sixth lens E6 has negative refractive power and is made of plastic material. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and the image-side surface has a point of inflection away from the optical axis.

[0145] The seventh lens E7 has positive refractive power and is made of plastic material. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, the object-side surface has a point of inflection away from the optical axis, the image-side surface has two points of inflection away from the optical axis, the object-side surface has a critical point away from the optical axis, and the image-side surface has two critical points away from the optical axis.

[0146] The eighth lens E8 has negative refractive power and is made of plastic material. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, the object-side surface has a point of inflection away from the optical axis, the image-side surface has a point of inflection away from the optical axis, the object-side surface has a critical point away from the optical axis, and the image-side surface has a critical point away from the optical axis.

[0147] The filter device E9 is made of glass and is disposed between the eighth lens E8 and the imaging surface IMG, without affecting the focal length of the optical image acquisition lens.

[0148] The aspherical curve equation of each lens is shown as follows:

[0149]

[0150] X: The displacement parallel to the optical axis from the intersection of the aspheric surface and the optical axis to the point on the aspheric surface that is Y away from the optical axis;

[0151] Y: The vertical distance between the point on the aspheric curve and the optical axis;

[0152] R: radius of curvature;

[0153] k: cone coefficient; and

[0154] A i : i-th order aspheric coefficient.

[0155] In the optical image acquisition lens of the first embodiment, the focal length of the optical image acquisition lens is f, the aperture value of the optical image acquisition lens is Fno, and half of the maximum viewing angle of the optical image acquisition lens is HFOV, whose values ​​are as follows: f=1.79 millimeters (mm), Fno=1.78, and HFOV=62.5 degrees (deg.).

[0156] The Abbe number of the second lens E2 is V2, the Abbe number of the sixth lens E6 is V6, and the Abbe number of the eighth lens E8 is V8, which satisfy the following condition: V2+V6+V8=60.8.

[0157] The Abbe number of the first lens E1 is V1, the Abbe number of the second lens E2 is V2, the Abbe number of the third lens E3 is V3, the Abbe number of the fourth lens E4 is V4, the Abbe number of the fifth lens E5 is V5, the Abbe number of the sixth lens E6 is V6, the Abbe number of the seventh lens E7 is V7, and the Abbe number of the eighth lens E8 is V8. The Abbe number of the i-th lens is Vi. The refractive index of the first lens E1 is N1, the refractive index of the second lens E2 is N2, the refractive index of the third lens E3 is N3, the refractive index of the fourth lens E4 is N4, the refractive index of the fifth lens E5 is N5, the refractive index of the sixth lens E6 is N6, the refractive index of the seventh lens E7 is N7, and the refractive index of the eighth lens E8 is N8. The refractive index of the i-th lens is Ni. The minimum value of Vi / Ni is min(Vi / Ni), which satisfies the following condition: min(Vi / Ni)=9.59, where i=1, 2, 3, 4, 5, 6, 7 or 8. In this embodiment, the ratio of the Abbe number to the refractive index of the third lens element E3 (V3 / N3), the ratio of the Abbe number to the refractive index of the sixth lens element E6 (V6 / N6), and the ratio of the Abbe number to the refractive index of the eighth lens element E8 (V8 / N8) are equal and smaller than the ratios of the Abbe number to the refractive index of the remaining lenses in the optical image acquisition lens. Therefore, min(Vi / Ni) is equal to V3 / N3, V6 / N6, or V8 / N8.

[0158] The thickness of the fourth lens E4 on the optical axis is CT4, the thickness of the fifth lens E5 on the optical axis is CT5, the thickness of the sixth lens E6 on the optical axis is CT6, the thickness of the seventh lens E7 on the optical axis is CT7, and the thickness of the eighth lens E8 on the optical axis is CT8. The distance between the fourth lens E4 and the fifth lens E5 on the optical axis is T45, the distance between the fifth lens E5 and the sixth lens E6 on the optical axis is T56, the distance between the sixth lens E6 and the seventh lens E7 on the optical axis is T67, and the distance between the seventh lens E7 and the eighth lens E8 on the optical axis is T78, which satisfies the following condition: (CT4 + CT5 + CT6 + CT7 + CT8) / (T45 + T56 + T67 + T78) = 3.61. In this embodiment, the distance between two adjacent lenses on the optical axis refers to the distance between two adjacent mirror surfaces of the two adjacent lenses on the optical axis.

[0159] The distance between the first lens E1 and the second lens E2 on the optical axis is T12, the distance between the second lens E2 and the third lens E3 on the optical axis is T23, the distance between the third lens E3 and the fourth lens E4 on the optical axis is T34, the distance between the fourth lens E4 and the fifth lens E5 on the optical axis is T45, the distance between the fifth lens E5 and the sixth lens E6 on the optical axis is T56, the distance between the sixth lens E6 and the seventh lens E7 on the optical axis is T67, and the distance between the seventh lens E7 and the eighth lens E8 on the optical axis is T78, which satisfies the following condition: (T12+T23) / (T34+T45+T56+T67+T78)=2.07.

[0160] The thickness of the first lens E1 on the optical axis is CT1 , and the thickness of the third lens E3 on the optical axis is CT3 , which satisfy the following condition: CT1 / CT3 = 1.37.

[0161] The thickness of the second lens E2 on the optical axis is CT2, and the thickness of the third lens E3 on the optical axis is CT3, which satisfy the following condition: CT2 / CT3=1.84.

[0162] The thickness of the second lens E2 on the optical axis is CT2, and the distance between the third lens E3 and the fourth lens E4 on the optical axis is T34, which satisfies the following condition: CT2 / T34=18.90.

[0163] The thickness of the fifth lens E5 on the optical axis is CT5, and the distance between the third lens E3 and the fourth lens E4 on the optical axis is T34, which satisfies the following condition: CT5 / T34=21.00.

[0164] The thickness of the sixth lens E6 on the optical axis is CT6, and the thickness of the eighth lens E8 on the optical axis is CT8, which satisfy the following condition: CT8 / CT6=1.30.

[0165] The distance between the first lens E1 and the second lens E2 on the optical axis is T12, the distance between the sixth lens E6 and the seventh lens E7 on the optical axis is T67, and the distance between the seventh lens E7 and the eighth lens E8 on the optical axis is T78, which satisfies the following condition: T12 / (T67+T78)=22.93.

[0166] The distance on the optical axis from the object-side surface of the first lens E1 to the image-side surface of the eighth lens E8 is TD, and the thickness on the optical axis of the eighth lens E8 is CT8, which satisfies the following condition: TD / CT8=14.33.

[0167] The distance between the object-side surface of the first lens E1 and the imaging plane IMG on the optical axis is TL, and the entrance pupil diameter of the optical image acquisition lens is EPD, which satisfies the following condition: TL / EPD=6.41.

[0168] The distance between the object-side surface of the first lens E1 and the imaging plane IMG on the optical axis is TL, and the focal length of the optical image acquisition lens is f, which satisfies the following condition: TL / f=3.60.

[0169] The distance between the object-side surface of the first lens E1 and the imaging plane IMG on the optical axis is TL, and the maximum imaging height of the optical image acquisition lens is ImgH, which satisfies the following condition: TL / ImgH=1.99.

[0170] The sum of the optical axis spacings between all adjacent lenses in the optical image capture lens is ΣAT. The optical axis spacing between the third lens E3 and the fourth lens E4 is T34, which satisfies the following condition: ΣAT / T34=97.05. In this embodiment, ΣAT is the sum of the optical axis spacings between any two adjacent lenses among the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8.

[0171] The sum of the distances along the optical axis between all adjacent lenses in the optical image capture lens is ΣAT, and the sum of the thicknesses along the optical axis of all lenses in the optical image capture lens is ΣCT, which satisfies the following condition: ΣAT / ΣCT = 0.63. In this embodiment, ΣCT is the sum of the thicknesses along the optical axis of the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, the sixth lens E6, the seventh lens E7, and the eighth lens E8.

[0172] The curvature radius of the image-side surface of the sixth lens E6 is R12, and the focal length of the optical image acquisition lens is f, which satisfies the following condition: |R12 / f|=1.32.

[0173] The radius of curvature of the object-side surface of the sixth lens E6 is R11, and the focal length of the optical image acquisition lens is f, which satisfies the following condition: R11 / f = -0.69.

[0174] The radius of curvature of the image-side surface of the sixth lens E6 is R12, and the radius of curvature of the object-side surface of the seventh lens E7 is R13, which satisfies the following condition: R12 / R13 = -0.49.

[0175] The focal length of the sixth lens E6 is f6, the focal length of the seventh lens E7 is f7, and the focal length of the eighth lens E8 is f8, which satisfies the following condition: (f6+f8) / f7 = -5.20.

[0176] The focal length of the optical image acquisition lens is f, the focal length of the first lens E1 is f1, the focal length of the second lens E2 is f2, the focal length of the third lens E3 is f3, the focal length of the fourth lens E4 is f4, the focal length of the fifth lens E5 is f5, the focal length of the sixth lens E6 is f6, the focal length of the seventh lens E7 is f7, and the focal length of the eighth lens E8 is f8, which satisfies the following conditions: f / f1 = -0.67; f / f2 = 0.28; |f / f3| = 0.08; |f / f4| = 0.79; |f / f5| = 0.02; f / f6 = -0.43; f / f7 = 0.83; and f / f8 = -0.25.

[0177] The focal length of the optical image acquisition lens is f, and the thickness of the fifth lens E5 on the optical axis is CT5, which satisfies the following condition: f / CT5 = 4.26.

[0178] The focal length of the optical image acquisition lens is f, the focal length of the third lens E3 is f3, the focal length of the fourth lens E4 is f4, and the focal length of the fifth lens E5 is f5, which satisfies the following condition: f / f3+f / f4+f / f5 = 0.69.

[0179] The focal length of the second lens E2 is f2, and the thickness of the second lens E2 on the optical axis is CT2, which satisfies the following condition: f2 / CT2 = 16.79.

[0180] The focal length of the first lens E1 is f1, and the focal length of the second lens E2 is f2, which satisfies the following condition: f2 / f1 = -2.38.

[0181] The focal length of the sixth lens E6 is f6, and the thickness of the sixth lens E6 on the optical axis is CT6, which satisfies the following condition: f6 / CT6 = -15.32.

[0182] The maximum absolute value of the distortion of the optical image acquisition lens in the maximum field of view is |Dist|max, which satisfies the following condition: |Dist|max = 5.81%. In this embodiment, the distortion can refer to Figure 2The distortion curve on the far right shows that the maximum absolute value of the distortion occurs at the maximum imaging height.

[0183] The maximum effective radius of the object-side surface of the first lens E1 is Y11, and the maximum effective radius of the image-side surface of the eighth lens E8 is Y82, which satisfy the following condition: Y11 / Y82=0.91.

[0184] A vertical distance between a critical point of the object-side surface of the eighth lens E8 and the optical axis is Yc81, and a maximum effective radius of the object-side surface of the eighth lens E8 is Y81, which satisfies the following condition: Yc81 / Y81=0.59.

[0185] A vertical distance between the off-axis critical point of the image-side surface of the eighth lens E8 and the optical axis is Yc82, and a maximum effective radius of the image-side surface of the eighth lens E8 is Y82, which satisfies the following condition: Yc82 / Y82=0.73.

[0186] Please refer to Table 1 and Table 2 below.

[0187]

[0188]

[0189]

[0190]

[0191] Table 1 Figure 1 Detailed structural data for the first embodiment is provided, with the units of curvature radius, thickness, and focal length expressed in millimeters (mm). Surfaces 0 through 21 represent the surfaces from the object side to the image side, respectively. Table 2 presents the aspheric surface data for the first embodiment, where k is the conic coefficient in the aspheric curve equation, and A4 through A20 represent the 4th through 20th order aspheric coefficients for each surface. Furthermore, the tables in the following embodiments correspond to the schematic diagrams and aberration curves for each embodiment. The definitions of the data in the tables are the same as those in Tables 1 and 2 of the first embodiment and are not further elaborated here.

[0192] <Second embodiment>

[0193] Please refer to Figures 3 and 4 ,in Figure 3 FIG. 1 is a schematic diagram of an imaging device according to a second embodiment of the present invention. Figure 4 From left to right are the spherical aberration, astigmatism and distortion curves of the second embodiment. Figure 3It is known that the image capturing device 2 comprises an optical image acquisition lens (not labeled separately) and an electronic image sensor IS. The optical image acquisition lens comprises, in order from the object side to the image side along the optical path, a first lens E1, a second lens E2, a stop ST, a third lens E3, a fourth lens E4, a diaphragm S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter device E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The optical image acquisition lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other lenses interposed between the lenses.

[0194] The first lens E1 has a negative refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has an inflection point at the off-axis position, and the image side surface thereof has an inflection point at the off-axis position.

[0195] The second lens E2 has a positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces, and the object side surface thereof has an inflection point at the off-axis position.

[0196] The third lens E3 has a positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces.

[0197] The fourth lens E4 has a positive refractive power and is made of glass. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces, and the object side surface thereof has an inflection point at the off-axis position.

[0198] The fifth lens E5 has a positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces. The object side surface thereof has an inflection point at the off-axis position, the image side surface thereof has an inflection point at the off-axis position, the object side surface thereof has a critical point at the off-axis position, and the image side surface thereof has a critical point at the off-axis position.

[0199] The sixth lens E6 has a negative refractive power and is made of plastic. The object side surface thereof is concave at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical surfaces, and the image side surface thereof has an inflection point at the off-axis position.

[0200] The seventh lens element E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspheric. Its object-side surface has an inflection point at off-axis positions, and its image-side surface has two inflection points at off-axis positions. Its object-side surface has a critical point at off-axis positions, and its image-side surface has two critical points at off-axis positions.

[0201] The eighth lens element E8 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspheric. Its object-side surface has an inflection point at off-axis positions, its image-side surface has an inflection point at off-axis positions, its object-side surface has a critical point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0202] The filter element E9 is made of glass and is disposed between the eighth lens element E8 and the imaging surface IMG, and does not affect the focal length of the optical image acquisition lens.

[0203] Please refer to Table 3 and Table 4 below.

[0204]

[0205]

[0206]

[0207]

[0208] In the second embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment and are not repeated here.

[0209]

[0210]

[0211] <Third embodiment>

[0212] Please refer to Figures 5 and 6 ,in Figure 5 FIG. 1 is a schematic diagram of an imaging device according to a third embodiment of the present invention. Figure 6 From left to right are the spherical aberration, astigmatism and distortion curves of the third embodiment. Figure 5It is known that the image capturing device 3 comprises an optical image acquisition lens (not labeled separately) and an electronic image sensor IS. The optical image acquisition lens comprises, in order from the object side to the image side along the optical path, a first lens E1, a second lens E2, an aperture stop ST, a third lens E3, a fourth lens E4, a diaphragm S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter device E9, and an imaging surface IMG. The electronic image sensor IS is disposed on the imaging surface IMG. The optical image acquisition lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other lenses interposed between the lenses.

[0213] The first lens E1 has a negative refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical, and the image side surface thereof has two inflection points at the off-axis region.

[0214] The second lens E2 has a positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces thereof are aspherical, and the object side surface thereof has one inflection point at the off-axis region.

[0215] The third lens E3 has a negative refractive power and is made of plastic. The object side surface thereof is concave at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical, the image side surface thereof has one inflection point at the off-axis region, and the image side surface thereof has one critical point at the off-axis region.

[0216] The fourth lens E4 has a positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical, and the object side surface thereof has one inflection point at the off-axis region.

[0217] The fifth lens E5 has a positive refractive power and is made of plastic. The object side surface thereof is convex at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical, the object side surface thereof has two inflection points at the off-axis region, the image side surface thereof has one inflection point at the off-axis region, and the object side surface thereof has one critical point at the off-axis region.

[0218] The sixth lens E6 has a negative refractive power and is made of plastic. The object side surface thereof is concave at the vicinity of the optical axis, and the image side surface thereof is convex at the vicinity of the optical axis. Both surfaces thereof are aspherical, the object side surface thereof has two inflection points at the off-axis region, the image side surface thereof has one inflection point at the off-axis region, and the image side surface thereof has one critical point at the off-axis region.

[0219] The seventh lens element E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspheric. Its object-side surface has an inflection point at off-axis positions, and its image-side surface has two inflection points at off-axis positions. Its object-side surface has a critical point at off-axis positions, and its image-side surface has two critical points at off-axis positions.

[0220] The eighth lens element E8 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspheric. Its object-side surface has an inflection point at off-axis positions, its image-side surface has an inflection point at off-axis positions, its object-side surface has a critical point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0221] The filter element E9 is made of glass and is disposed between the eighth lens element E8 and the imaging surface IMG, and does not affect the focal length of the optical image acquisition lens.

[0222] Please refer to Table 5 and Table 6 below.

[0223]

[0224]

[0225]

[0226]

[0227]

[0228] In the third embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment and are not repeated here.

[0229]

[0230]

[0231] <Fourth embodiment>

[0232] Please refer to Figures 7 and 8 ,in Figure 7 FIG. 1 is a schematic diagram of an imaging device according to a fourth embodiment of the present invention. Figure 8 From left to right are the spherical aberration, astigmatism and distortion curves of the fourth embodiment. Figure 7As can be seen, the imaging device 4 includes an optical image capture lens (not separately labeled) and an electronic photosensitive device IS. The optical image capture lens comprises, in order from the object side to the image side, a first lens E1, an aperture S1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, an aperture S2, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter device E9, and an imaging surface IMG. The electronic photosensitive device IS is disposed on the imaging surface IMG. The optical image capture lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, and E8), with no other lenses interposed between the lenses.

[0233] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis locations, its image-side surface has an inflection point at off-axis locations, and its object-side surface has a critical point at off-axis locations.

[0234] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and the object-side surface has an inflection point at an off-axis position.

[0235] The third lens element E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and the object-side surface has an inflection point off-axis.

[0236] The fourth lens element E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point and a critical point at off-axis locations.

[0237] The fifth lens element E5 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points at off-axis positions and a critical point at off-axis positions.

[0238] The sixth lens element E6 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. The image-side surface has an inflection point and a critical point off-axis.

[0239] The seventh lens element E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspheric. Its object-side surface has an inflection point at off-axis positions, and its image-side surface has two inflection points at off-axis positions. Its object-side surface has a critical point at off-axis positions, and its image-side surface has two critical points at off-axis positions.

[0240] The eighth lens element E8 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspheric. Its object-side surface has an inflection point at off-axis positions, its image-side surface has an inflection point at off-axis positions, its object-side surface has a critical point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0241] The filter element E9 is made of glass and is disposed between the eighth lens element E8 and the imaging surface IMG, and does not affect the focal length of the optical image acquisition lens.

[0242] Please refer to Table 7 and Table 8 below.

[0243]

[0244]

[0245]

[0246]

[0247]

[0248] In the fourth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment and are not repeated here.

[0249]

[0250] <Fifth embodiment>

[0251] Please refer to Figures 9 and 10 ,in Figure 9 FIG. 1 is a schematic diagram of an imaging device according to a fifth embodiment of the present invention. Figure 10 From left to right are the spherical aberration, astigmatism and distortion curves of the fifth embodiment. Figure 9As can be seen, the imaging device 5 includes an optical image capture lens (not separately labeled) and an electronic photosensitive device IS. The optical image capture lens comprises, in order from the object side to the image side, a first lens E1, a second lens E2, a third lens E3, an aperture ST, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter device E9, and an imaging surface IMG. The electronic photosensitive device IS is disposed on the imaging surface IMG. The optical image capture lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, and E8), with no other lenses interposed between the lenses.

[0252] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis locations, its image-side surface has an inflection point at off-axis locations, and its object-side surface has a critical point at off-axis locations.

[0253] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and the object-side surface has an inflection point at an off-axis position.

[0254] The third lens element E3 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is also concave near the optical axis. Both surfaces are aspherical.

[0255] The fourth lens element E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is also convex near the optical axis. Both surfaces are aspherical, and the image-side surface has an inflection point off-axis.

[0256] The fifth lens element E5 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points at off-axis locations, its image-side surface has one inflection point at off-axis locations, and its object-side surface has a critical point at off-axis locations.

[0257] The sixth lens element E6 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis positions, and its image-side surface has an inflection point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0258] The seventh lens element E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspheric. Its object-side surface has an inflection point at off-axis positions, its image-side surface has three inflection points at off-axis positions, its object-side surface has a critical point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0259] The eighth lens element E8 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspheric. Its object-side surface has an inflection point at off-axis positions, its image-side surface has an inflection point at off-axis positions, its object-side surface has a critical point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0260] The filter element E9 is made of glass and is disposed between the eighth lens element E8 and the imaging surface IMG, and does not affect the focal length of the optical image acquisition lens.

[0261] Please refer to Table 9 and Table 10 below.

[0262]

[0263]

[0264]

[0265]

[0266] In the fifth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment and are not repeated here.

[0267]

[0268]

[0269] <Sixth embodiment>

[0270] Please refer to Figures 11 to 12 ,in Figure 11 FIG. 1 is a schematic diagram of an imaging device according to a sixth embodiment of the present invention. Figure 12 From left to right are the spherical aberration, astigmatism and distortion curves of the sixth embodiment. Figure 11As can be seen, the imaging device 6 includes an optical image capture lens (not separately labeled) and an electronic photosensitive device IS. The optical image capture lens includes, in order from the object side to the image side, a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a stop S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a stop S2, a filter device E9, and an imaging surface IMG. The electronic photosensitive device IS is disposed on the imaging surface IMG. The optical image capture lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, and E8), with no other lenses interposed between the lenses.

[0271] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis locations, its image-side surface has an inflection point at off-axis locations, and its object-side surface has a critical point at off-axis locations.

[0272] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point and a critical point at off-axis locations.

[0273] The third lens element E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and the image-side surface has an inflection point off-axis.

[0274] The fourth lens element E4 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point off-axis, and its image-side surface has two inflection points off-axis.

[0275] The fifth lens element E5 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points at off-axis locations, its image-side surface has one inflection point at off-axis locations, and its object-side surface has a critical point at off-axis locations.

[0276] The sixth lens element E6 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis positions, and its image-side surface has an inflection point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0277] The seventh lens element E7 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis positions, its image-side surface has two inflection points at off-axis positions, and its object-side surface has a critical point at off-axis positions.

[0278] The eighth lens element E8 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspheric. Its object-side surface has two inflection points at off-axis positions, and its image-side surface has three inflection points at off-axis positions. Its object-side surface has a critical point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0279] The filter element E9 is made of glass and is disposed between the aperture S2 and the imaging surface IMG, and does not affect the focal length of the optical image acquisition lens.

[0280] Please refer to Table 11 and Table 12 below.

[0281]

[0282]

[0283]

[0284]

[0285]

[0286] In the sixth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment and are not repeated here.

[0287]

[0288]

[0289] <Seventh embodiment>

[0290] Please refer to Figures 13 and 14 ,in Figure 13 FIG. 1 is a schematic diagram of an imaging device according to a seventh embodiment of the present invention. Figure 14 From left to right are the spherical aberration, astigmatism and distortion curves of the seventh embodiment. Figure 13As can be seen, the imaging device 7 includes an optical image capture lens (not separately labeled) and an electronic photosensitive device IS. The optical image capture lens comprises, in order from the object side to the image side, a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a stop S1, a seventh lens E7, an eighth lens E8, a filter device E9, and an imaging surface IMG. The electronic photosensitive device IS is disposed on the imaging surface IMG. The optical image capture lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, and E8), with no other lenses interposed between the lenses.

[0291] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis locations, its image-side surface has an inflection point at off-axis locations, and its object-side surface has a critical point at off-axis locations.

[0292] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and the object-side surface has an inflection point at an off-axis position.

[0293] The third lens element E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical, and the image-side surface has an inflection point off-axis.

[0294] The fourth lens element E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has three inflection points at off-axis locations, its image-side surface has two inflection points at off-axis locations, and its object-side surface has a critical point at off-axis locations.

[0295] The fifth lens element E5 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point off-axis, and its image-side surface also has an inflection point off-axis.

[0296] The sixth lens element E6 has negative refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis positions, and its image-side surface has an inflection point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0297] The seventh lens E7 has positive refractive power and is made of plastic material. Its object-side surface is convex at the vicinity of the optical axis, and its image-side surface is convex at the vicinity of the optical axis. Both surfaces are aspherical. The object-side surface has one inflection point at the off-axis region, the image-side surface has two inflection points at the off-axis region, and the object-side surface has one critical point at the off-axis region.

[0298] The eighth lens E8 has negative refractive power and is made of plastic material. Its object-side surface is convex at the vicinity of the optical axis, and its image-side surface is concave at the vicinity of the optical axis. Both surfaces are aspherical. The object-side surface has four inflection points at the off-axis region, the image-side surface has one inflection point at the off-axis region, the object-side surface has one critical point at the off-axis region, and the image-side surface has one critical point at the off-axis region.

[0299] The filter device E9 is made of glass and is disposed between the eighth lens E8 and the imaging plane IMG, and does not affect the focal length of the optical image acquisition lens.

[0300] Please refer to Table XIII and Table XIV below.

[0301]

[0302]

[0303]

[0304]

[0305]

[0306] In the seventh embodiment, the aspherical surface is represented by the same form as that of the first embodiment. In addition, the definitions described in the following tables are the same as those of the first embodiment, and are not described herein.

[0307]

[0308]

[0309] <The eighth embodiment>

[0310] Please refer to Figures 15 and 16 wherein Figure 15 The schematic diagram of the image acquisition device according to the eighth embodiment of the present application is shown in Figure 16 The left to right in order are the spherical aberration, the astigmatism and the distortion curves of the eighth embodiment. The curves of the eighth embodiment are shown in Figure 15As can be seen, the imaging device 8 includes an optical image capture lens (not separately labeled) and an electronic photosensitive device IS. The optical image capture lens comprises, in order from the object side to the image side, a first lens E1, a second lens E2, an aperture S1, a third lens E3, an aperture ST, a fourth lens E4, a fifth lens E5, an aperture S2, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter device E9, and an imaging surface IMG. The electronic photosensitive device IS is disposed on the imaging surface IMG. The optical image capture lens comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, and E8), with no other lenses interposed between the lenses.

[0311] The first lens E1 has negative refractive power and is made of plastic. Its object-side surface is flat near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and the image-side surface has an inflection point off-axis.

[0312] The second lens E2 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical, and the object-side surface has an inflection point at an off-axis position.

[0313] The third lens element E3 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has three inflection points at off-axis locations, its image-side surface has two inflection points at off-axis locations, and its object-side surface has a critical point at off-axis locations.

[0314] The fourth lens element E4 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis locations, and its image-side surface has three inflection points at off-axis locations, as well as a critical point at off-axis locations.

[0315] The fifth lens element E5 has positive refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points and two critical points at off-axis positions.

[0316] The sixth lens element E6 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspherical. Its object-side surface has an inflection point at off-axis positions, its image-side surface has two inflection points at off-axis positions, and its object-side surface has a critical point at off-axis positions.

[0317] The seventh lens element E7 has positive refractive power and is made of plastic. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are aspherical. Its object-side surface has two inflection points at off-axis positions, its image-side surface has two inflection points at off-axis positions, and its object-side surface has a critical point at off-axis positions.

[0318] The eighth lens element E8 has negative refractive power and is made of plastic. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are aspheric. Its object-side surface has an inflection point at off-axis positions, its image-side surface has an inflection point at off-axis positions, its object-side surface has a critical point at off-axis positions, and its image-side surface has a critical point at off-axis positions.

[0319] The filter element E9 is made of glass and is disposed between the eighth lens element E8 and the imaging surface IMG, and does not affect the focal length of the optical image acquisition lens.

[0320] Please refer to Table 15 and Table 16 below.

[0321]

[0322]

[0323]

[0324]

[0325]

[0326] In the eighth embodiment, the curve equation of the aspheric surface is expressed in the same form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment and are not repeated here.

[0327]

[0328] Ninth embodiment

[0329] Please refer to Figure 17, is a three-dimensional schematic diagram illustrating an imaging device according to the ninth embodiment of the present invention. In this embodiment, the imaging device 100 is a camera module. The imaging device 100 includes an imaging lens 101, a driving device 102, an electronic photosensitive device 103, and an image stabilization module 104. The imaging lens 101 includes the optical image acquisition lens of the first embodiment described above, a lens barrel (not separately labeled) for carrying the optical image acquisition lens, and a support device (Holder Member, not separately labeled). The imaging lens 101 can also be configured with the optical image acquisition lens of the other embodiments described above, but the present invention is not limited thereto. The imaging device 100 uses the imaging lens 101 to focus light to generate an image, and cooperates with the driving device 102 to focus the image. Finally, the image is formed on the electronic photosensitive device 103 and can be output as image data.

[0330] The driving device 102 can have an auto-focus function and can be driven by a driving system such as a voice coil motor (VCM), a micro electro-mechanical system (MEMS), a piezoelectric system, and a shape memory alloy. The driving device 102 allows the imaging lens 101 to achieve an optimal imaging position, providing clear images of the subject at various object distances. In addition, the imaging device 100 is equipped with an electronic photosensitive device 103 (such as a CMOS or CCD) with high sensitivity and low noise, which is disposed on the imaging surface of the optical image capture lens, thereby truly demonstrating the excellent imaging quality of the optical image capture lens.

[0331] The image stabilization module 104 can be, for example, an accelerometer, a gyroscope, or a Hall Effect Sensor. The driver 102 can work with the image stabilization module 104 to function as an optical image stabilization (OIS) device. This device adjusts the different axial directions of the imaging lens 101 to compensate for image blur caused by shaking at the moment of capture. Alternatively, it can utilize image compensation technology within imaging software to provide electronic image stabilization (EIS), further enhancing image quality in dynamic and low-light scenes.

[0332] <Tenth embodiment>

[0333] Please refer to Figures 18 to 20 ,in Figure 18 FIG2 is a perspective diagram showing one side of an electronic device according to a tenth embodiment of the present invention. Figure 19 Draw Figure 18A three-dimensional schematic diagram of the other side of the electronic device, and Figure 20 Draw Figure 18 A system block diagram of an electronic device.

[0334] In this embodiment, the electronic device 200 is a smartphone. The electronic device 200 includes the imaging device 100, imaging device 100a, imaging device 100b, imaging device 100c, imaging device 100d, a flash module 201, a focus assist module 202, an image signal processor 203, a display module 204, and an image software processor 205 of the ninth embodiment. The imaging device 100 and the imaging device 100a are both disposed on the same side of the electronic device 200. The focus assist module 202 can be a laser rangefinder or a Time of Flight (ToF) module, but the present invention is not limited thereto. The imaging devices 100b, 100c, 100d, and display module 204 are all disposed on the other side of the electronic device 200. The display module 204 can serve as a user interface, allowing the imaging devices 100b, 100c, and 100d to function as front-facing cameras to provide a selfie function, but the present invention is not limited thereto. Furthermore, the imaging devices 100a, 100b, 100c, and 100d can each include the optical image acquisition lens of the present invention and can have a similar structural configuration to the imaging device 100. Specifically, the imaging devices 100a, 100b, 100c, and 100d can each include an imaging lens, a drive device, an electronic photosensitive device, and an image stabilization module. The imaging lenses of the imaging devices 100a, 100b, 100c and 100d may each include an optical lens assembly, a lens barrel for carrying the optical lens assembly, and a supporting device, such as the optical image acquisition lens of the present invention.

[0335] Image capture device 100 is a wide-angle image capture device, image capture device 100a is an ultra-wide-angle image capture device, image capture device 100b is a wide-angle image capture device, image capture device 100c is an ultra-wide-angle image capture device, and image capture device 100d is a time-of-flight image capture device. Image capture device 100 and image capture device 100a of this embodiment have different viewing angles, allowing electronic device 200 to provide different magnifications, thereby achieving an optical zoom effect. Furthermore, image capture device 100d can acquire depth information from an image. While the electronic device 200 described above includes multiple image capture devices 100, 100a, 100b, 100c, and 100d, the number and configuration of the image capture devices are not intended to limit the present invention.

[0336] When a user photographs the subject 206, the electronic device 200 utilizes the imaging device 100 or the imaging device 100a to focus and capture the image, activates the flash module 201 for fill light, and uses the object distance information of the subject 206 provided by the focus assist module 202 for rapid focusing. Furthermore, the image signal processor 203 performs image optimization processing to further enhance the image quality produced by the optical image acquisition lens. The focus assist module 202 may utilize an infrared or laser focus assist system to achieve rapid focusing. Furthermore, the electronic device 200 may also utilize the imaging device 100b, the imaging device 100c, or the imaging device 100d for photographing. The display module 204 may utilize a touch screen, in conjunction with the diverse functions of the image software processor 205, for image capture and image processing (or a physical capture button may be utilized for capturing). The image processed by the image software processor 205 may be displayed on the display module 204.

[0337] <Eleventh Embodiment>

[0338] Please refer to Figure 21 , is a schematic three-dimensional diagram illustrating one side of an electronic device according to the eleventh embodiment of the present invention.

[0339] In this embodiment, electronic device 300 is a smartphone. Electronic device 300 includes the imaging device 100 of the ninth embodiment, an imaging device 100e, an imaging device 100f, a flash module 301, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). Imaging device 100, imaging device 100e, and imaging device 100f are all located on the same side of electronic device 300, while the display module is located on the other side of electronic device 300. Furthermore, imaging device 100e and imaging device 100f can both include the optical image acquisition lens of the present invention and have similar structural configurations to imaging device 100, and therefore will not be further described here.

[0340] The imaging device 100 is a wide-angle imaging device, the imaging device 100e is a telephoto imaging device, and the imaging device 100f is an ultra-wide-angle imaging device. The imaging devices 100, 100e, and 100f of this embodiment have different viewing angles, so that the electronic device 300 can provide different magnifications to achieve an optical zoom shooting effect. In addition, the imaging device 100e is a telephoto imaging device with an optical path deflection device configuration, so that the total length of the imaging device 100e is not limited by the thickness of the electronic device 300. The optical path deflection device configuration of the imaging device 100e can, for example, have a similar Figures 24 to 26 The structure of Figures 24 to 26The electronic device 300 described above includes multiple imaging devices 100, 100e, and 100f, but the number and configuration of the imaging devices are not intended to limit the present invention. When a user photographs a subject, the electronic device 300 utilizes imaging device 100, imaging device 100e, or imaging device 100f to focus light and capture the image, activates the flash module 301 for fill light, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be further described here.

[0341] <Twelfth embodiment>

[0342] Please refer to Figure 22 , is a schematic three-dimensional diagram illustrating one side of an electronic device according to a twelfth embodiment of the present invention.

[0343] In this embodiment, the electronic device 400 is a smartphone. The electronic device 400 includes the imaging device 100, 100g, 100h, 100i, 100j, 100k, 100m, 100n, and 100p of the ninth embodiment, a flash module 401, a focus assist module, an image signal processor, a display module, and an image software processor (not shown). The imaging devices 100, 100g, 100h, 100i, 100j, 100k, 100m, 100n, and 100p are all located on the same side of the electronic device 400, while the display module is located on the other side of the electronic device 400. Furthermore, the imaging device 100g, the imaging device 100h, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, and the imaging device 100p may all include the optical image acquisition lens of the present invention and may all have a similar structural configuration to the imaging device 100, which will not be further described herein.

[0344] Image capture device 100 is a wide-angle image capture device, image capture device 100g is a telephoto image capture device, image capture device 100h is a telephoto image capture device, image capture device 100i is a wide-angle image capture device, image capture device 100j is an ultra-wide-angle image capture device, image capture device 100k is an ultra-wide-angle image capture device, image capture device 100m is a telephoto image capture device, image capture device 100n is a telephoto image capture device, and image capture device 100p is a time-of-flight range-finding image capture device. Image capture devices 100, 100g, 100h, 100i, 100j, 100k, 100m, and 100n of this embodiment have different viewing angles, allowing electronic device 400 to provide different magnifications, thereby achieving an optical zoom photography effect. In addition, the imaging device 100g and the imaging device 100h can be telescopic imaging devices with an optical path deflection device configuration. Figures 24 to 26 The structure of Figures 24 to 26 The description thereof will not be repeated here. In addition, the imaging device 100p is capable of obtaining depth information of an image. The above-mentioned electronic device 400 is taken as an example including a plurality of imaging devices 100, 100g, 100h, 100i, 100j, 100k, 100m, 100n, and 100p, but the number and configuration of the imaging devices are not intended to limit the present invention. When a user photographs a subject, the electronic device 400 utilizes the imaging device 100, the imaging device 100g, the imaging device 100h, the imaging device 100i, the imaging device 100j, the imaging device 100k, the imaging device 100m, the imaging device 100n, or the imaging device 100p to focus light and capture an image, activates the flash module 401 for fill light, and performs subsequent processing in a manner similar to the aforementioned embodiment, which will not be repeated here.

[0345] The imaging device of the present invention is not limited to use in smartphones. The imaging device can also be applied to mobile focus systems as needed, combining excellent aberration correction with good image quality. For example, the imaging device can be widely used in electronic devices such as three-dimensional (3D) image acquisition, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring equipment, driving recorders, reversing imaging devices, multi-lens devices, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of the present invention and do not limit the scope of application of the imaging device of the present invention.

[0346] Although the present invention is disclosed above with reference to the preferred embodiments, they are not intended to limit the present invention. Relevant persons in this field may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be determined by the scope of the patent application attached to this specification.

Claims

1. An optical image acquisition lens, characterized in that: It includes eight lenses. The eight lenses are, in order from the object side to the image side along the optical path, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens. And the eight lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction; Among them, the first lens has a negative refractive power, the second lens has a positive refractive power. The object-side surface of the second lens is convex near the optical axis. The sixth lens has a negative refractive power. The image-side surface of the eighth lens is concave near the optical axis. And at least one of the object-side surface and the image-side surface of at least one lens in the optical image acquisition lens has at least one inflection point off the axis; Among them, the Abbe number of the second lens is V2, the Abbe number of the sixth lens is V6, the Abbe number of the eighth lens is V8. The radius of curvature of the image-side surface of the sixth lens is R12. The focal length of the optical image acquisition lens is f, and it satisfies the following conditions: 30.0 < V2 + V6 + V8 < 85.0; and 0 < |R12 / f| < 3.

0.

2. The optical image acquisition lens according to claim 1, wherein: The Abbe number of the second lens is V2, the Abbe number of the sixth lens is V6, the Abbe number of the eighth lens is V8. The radius of curvature of the image-side surface of the sixth lens is R12. The focal length of the optical image acquisition lens is f, and it satisfies the following conditions: 40.0 < V2 + V6 + V8 < 80.0; and 0.50 < |R12 / f| < 2.

0.

3. The optical image acquisition lens according to claim 1, wherein: The thickness of the second lens on the optical axis is CT2, and the distance between the third lens and the fourth lens on the optical axis is T34, and it satisfies the following conditions: 2.7 < CT2 / T34 < 50.

4. The optical image acquisition lens according to claim 1, wherein: The thickness of the first lens on the optical axis is CT1, the thickness of the third lens on the optical axis is CT3, the thickness of the sixth lens on the optical axis is CT6, and the thickness of the eighth lens on the optical axis is CT8, and it satisfies the following conditions: 0.55 < CT1 / CT3 < 1.8; and 0 < CT8 / CT6 < 2.

0.

5. The optical image acquisition lens according to claim 1, wherein: The radius of curvature of the object-side surface of the sixth lens is R11. The focal length of the optical image acquisition lens is f, and it satisfies the following conditions: -0.90 < R11 / f < 4.

3.

6. The optical image acquisition lens according to claim 1, wherein: The radius of curvature of the image-side surface of the sixth lens is R12, and the radius of curvature of the object-side surface of the seventh lens is R13, and it satisfies the following conditions: -3.0 < R12 / R13 < 0.

7. The optical image acquisition lens according to claim 1, wherein: The sum of the distances between all adjacent lenses of the optical image acquisition lens on the optical axis is ΣAT, the sum of the thicknesses of all lenses of the optical image acquisition lens on the optical axis is ΣCT, the maximum effective radius of the object-side surface of the first lens is Y11, and the maximum effective radius of the image-side surface of the eighth lens is Y82, and it satisfies the following conditions: 0.20 < ΣAT / ΣCT < 0.90; and 0.60 < Y11 / Y82 < 1.6; Among them, the perpendicular distance between the critical point on the image side surface of the eighth lens and the optical axis is Yc82, the maximum effective radius of the image side surface of the eighth lens is Y82, and at least one critical point exists at an off-axis position on the image side surface of the eighth lens and satisfies the following condition: 0.30 < Yc82 / Y82 < 0.

90.

8. The optical image acquisition lens according to claim 1, wherein: The seventh lens has a positive refractive power, and the eighth lens has a negative refractive power; Among them, the focal length of the optical image acquisition lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, and the focal length of the eighth lens is f8, and they satisfy the following conditions: -0.90 < f / f1 < -0.50; 0.10 < f / f2 < 0.50; |f / f3| < 1.0; |f / f4| < 1.0; |f / f5| < 0.65; -1.0 < f / f6 < -0.10; 0.50 < f / f7 < 1.2; and -1.0 < f / f8 < -0.10.

Images