Optical camera system and image capturing device

Abstract

An optical camera system 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 an object side direction and an image side surface facing an image side direction. The third lens has a concave object side surface at a vicinity of an optical axis. The fourth lens has a positive refractive power. The fifth lens has a positive refractive power. The sixth lens has a positive refractive power. The seventh lens has a negative refractive power, and the seventh lens has a concave image side surface at a vicinity of the optical axis. When certain conditions are met, the optical camera system can simultaneously meet the requirements of miniaturization and high imaging quality. An image capturing device having the optical camera system is also disclosed.

Description

TECHNICAL FIELD

[0001] The present application relates to an optical camera system and an image capturing device, in particular, to an optical camera system for an image capturing device. BACKGROUND

[0002] With the development of semiconductor technology, the performance of electronic photosensitive elements is improved, and the pixel size can be smaller. Therefore, optical lenses with high imaging quality are indispensable.

[0003] With the rapid development of technology, image capturing devices equipped with optical lenses are widely used, and the requirements for optical lenses are more diverse. Since the existing optical lenses are not easy to balance the demands of imaging quality, sensitivity, aperture size, volume, or viewing angle, the present application provides an optical lens to meet the needs. SUMMARY

[0004] The present application provides an optical camera system and an image capturing device. The optical camera system comprises eight lenses arranged in order from the object side to the image side along the optical path. When certain conditions are met, the optical camera system provided by the present application can meet the needs of miniaturization and high imaging quality at the same time.

[0005] The present application provides an optical camera system comprising eight lenses. The eight lenses are sequentially arranged from the object side to the image side along the optical path as 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. 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 third lens object side surface is concave at the near optical axis. The fourth lens has positive refractive power. The fifth lens has positive refractive power, and the fifth lens image side surface is convex at the near optical axis. The sixth lens has positive refractive power. The seventh lens has negative refractive power, and the seventh lens image side surface is concave at the near optical axis. The sum of the thicknesses of all lenses in the optical camera system on the optical axis is ΣCT, and the sum of the interval distances of all adjacent lenses in the optical camera system on the optical axis is ΣAT, which satisfies the following conditions:

[0006] 3.0 < ΣCT / ΣAT.

[0007] The present application provides an optical image capturing system, which includes eight lenses. The eight lenses are sequentially arranged from an object side to an image side along an optical path 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 first lens has a negative refractive power. The third lens has a negative refractive power, and the object side surface of the third lens is concave at a vicinity of an optical axis. The fourth lens has a positive refractive power. The fifth lens has a positive refractive power. The sixth lens has a positive refractive power, and the image side surface of the sixth lens is convex at a vicinity of the optical axis. The seventh lens has a negative refractive power, and the image side surface of the seventh lens is concave at a vicinity of the optical axis. A sum of thicknesses of all the lenses in the optical image capturing system on the optical axis is ΣCT, and a sum of interval distances of all the adjacent lenses in the optical image capturing system on the optical axis is ΣAT, which satisfy the following conditions:

[0008] 2.5 < ΣCT / ΣAT.

[0009] The present application provides an optical image capturing system, which includes eight lenses. The eight lenses are sequentially arranged from an object side to an image side along an optical path 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 first lens has a negative refractive power. The third lens has a negative refractive power, and the object side surface of the third lens is concave at a vicinity of an optical axis. The fourth lens has a positive refractive power. The fifth lens has a positive refractive power. The sixth lens has a positive refractive power. The seventh lens has a negative refractive power, and the image side surface of the seventh lens is concave at a vicinity of the optical axis. A sum of thicknesses of all the lenses in the optical image capturing system on the optical axis is ΣCT, and a sum of interval distances of all the adjacent lenses in the optical image capturing system on the optical axis is ΣAT, which satisfy the following conditions:

[0010] 2.5 < ΣCT / ΣAT.

[0011] The present application provides an optical image capturing system, which includes eight lenses. The eight lenses are sequentially arranged from an object side to an image side along an optical path 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 first lens has a negative refractive power. The third lens has a negative refractive power, and the object side surface of the third lens is concave at a vicinity of an optical axis. The fourth lens has a positive refractive power. The fifth lens has a positive refractive power. The sixth lens has a positive refractive power. The seventh lens has a negative refractive power, and the image side surface of the seventh lens is concave at a vicinity of the optical axis. A sum of thicknesses of all the lenses in the optical image capturing system on the optical axis is ΣCT, and a sum of interval distances of all the adjacent lenses in the optical image capturing system on the optical axis is ΣAT, which satisfy the following conditions:

[0012] When ΣCT / ΣAT satisfies the above conditions, the lens configuration can be adjusted, which helps to compress the total length of the optical image capturing system.

[0013] The above description about the content of the present application and the following description of the embodiments are used to demonstrate and explain the spirit and principles of the present application, and provide further explanation for the claims of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A schematic view of an image capturing device according to a first embodiment of the present application is shown.

[0015] Figure 2 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the first embodiment.

[0016] Figure 3 A schematic diagram of an image pickup device according to a second embodiment of the present application is shown.

[0017] Figure 4 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the second embodiment.

[0018] Figure 5 A schematic diagram of an image pickup device according to a third embodiment of the present application is shown.

[0019] Figure 6 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the third embodiment.

[0020] Figure 7 A schematic diagram of an image pickup device according to a fourth embodiment of the present application is shown.

[0021] Figure 8 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the fourth embodiment.

[0022] Figure 9 A schematic diagram of an image pickup device according to a fifth embodiment of the present application is shown.

[0023] Figure 10 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the fifth embodiment.

[0024] Figure 11 A schematic diagram of an image pickup device according to a sixth embodiment of the present application is shown.

[0025] Figure 12 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the sixth embodiment.

[0026] Figure 13 A schematic diagram of an image pickup device according to a seventh embodiment of the present application is shown.

[0027] Figure 14 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the seventh embodiment.

[0028] Figure 15 A schematic diagram of an image pickup device according to an eighth embodiment of the present application is shown.

[0029] Figure 16 From left to right in sequence are the spherical aberration, astigmatism and distortion curves of the eighth embodiment.

[0030] Figure 17 A schematic diagram of an image pickup device according to a ninth embodiment of the present application is shown.

[0031] Figure 18 A diagram illustrating parameters Y11, Y52, Y82 according to the first embodiment of the present application.

[0032] Figure 19 A diagram illustrating a configuration relationship of the optical path turning element according to the present application in an optical image pickup system group.

[0033] Figure 20 A diagram illustrating another configuration relationship of the optical path turning element according to the present application in an optical image pickup system group.

[0034] Figure 21 A diagram illustrating a configuration relationship of two optical path turning elements according to the present application in an optical image pickup system group.

[0035]

Symbol Explanation

[0036] 1, 2, 3, 4, 5, 6, 7, 8, 100: image pickup device

[0037] CAR: car

[0038] IM: imaging plane

[0039] OA1: first optical axis

[0040] OA2: second optical axis

[0041] OA3: third optical axis

[0042] LF: optical path turning element

[0043] LF1: first optical path turning element

[0044] LF2: second optical path turning element

[0045] LG: lens group

[0046] ST: stop

[0047] S1: diaphragm

[0048] E1: first lens

[0049] E2: second lens

[0050] E3: third lens

[0051] E4: fourth lens

[0052] E5: fifth lens

[0053] E6: sixth lens

[0054] E7: seventh lens

[0055] E8: eighth lens

[0056] E9: filter element

[0057] IMG: imaging surface

[0058] IS: electronic photosensitive element

[0059] Y11: maximum effective radius of first lens object side surface

[0060] Y52: maximum effective radius of fifth lens image side surface

[0061] Y82: maximum effective radius of eighth lens image side surface DETAILED DESCRIPTION

[0062] The optical image capturing system group 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 an object side direction and an image side surface facing an image side direction.

[0063] The first lens can have a negative refractive power; thereby, the refractive power configuration of the optical image capturing system group can be adjusted, which helps to increase the angle of view. The first lens object side surface can be convex at a vicinity of the optical axis; thereby, the direction of light entering the optical image capturing system group can be adjusted, which helps to increase the angle of view. The first lens image side surface can be concave at a vicinity of the optical axis; thereby, the surface shape and the refractive power of the first lens can be adjusted, which helps to correct aberrations such as astigmatism.

[0064] The third lens can have a negative refractive power; thereby, the refractive power configuration of the object side end of the optical image capturing system group can be balanced, which helps to increase the angle of view and correct aberrations. The third lens object side surface is concave at a vicinity of the optical axis; thereby, the direction of light can be adjusted, which helps to increase the aperture.

[0065] The fourth lens has a positive refractive power; thereby, the volume of the object side end of the optical image capturing system group can be compressed. The fourth lens image side surface can be convex at a vicinity of the optical axis; thereby, the direction of light can be adjusted, which helps to balance the outer diameter distribution of the optical image capturing system group.

[0066] The fifth lens has a positive refractive power; thereby, the refractive power configuration of the optical image capturing system group can be adjusted, which helps to balance between the angle of view and the volume distribution. The fifth lens object side surface can be convex at a vicinity of the optical axis; thereby, the fifth lens can cooperate with the fourth lens, which helps to improve the image quality of a wide angle of view. The fifth lens image side surface can be convex at a vicinity of the optical axis; thereby, the direction of light can be adjusted, which helps to compress the outer diameter of the image side end of the optical image capturing system group.

[0067] The sixth lens has positive refractive power; thereby, it helps to compress the volume of the image side end of the optical camera lens set. The image side surface of the sixth lens can be convex at the vicinity of the optical axis; thereby, it can cooperate with the seventh lens to correct aberrations.

[0068] The seventh lens has negative refractive power; thereby, it helps to balance the refractive power configuration of the image side end of the optical camera lens set, and helps to correct spherical aberration and other aberrations. The object side surface of the seventh lens can be concave at the vicinity of the optical axis; thereby, it can cooperate with the sixth lens to correct aberrations. The image side surface of the seventh lens is concave at the vicinity of the optical axis; thereby, it helps to reduce the incident angle of light on the imaging surface, and improves the response efficiency of the electronic photosensitive element.

[0069] In the optical camera lens set disclosed in the present application, the third lens and the fourth lens can be bonded together; thereby, it helps to correct chromatic aberration and other aberrations, and reduces the assembly difficulty to improve the yield. In the optical camera lens set disclosed in the present application, the sixth lens and the seventh lens can be bonded together; thereby, it helps to correct chromatic aberration and other aberrations, and reduces the assembly difficulty to improve the yield.

[0070] The sum of the thicknesses of all the lenses in the optical camera lens set on the optical axis is ΣCT, and the sum of the interval distances of all the adjacent lenses in the optical camera lens set on the optical axis is ΣAT, which satisfies the following condition: 2.5 < ΣCT / ΣAT. Thereby, the lens configuration can be adjusted, and it helps to compress the total length of the optical camera lens set. In addition, the following conditions can also be satisfied: 3.0 < ΣCT / ΣAT; 3.5 < ΣCT / ΣAT; 4.0 < ΣCT / ΣAT; ΣCT / ΣAT < 20; ΣCT / ΣAT < 15; ΣCT / ΣAT < 10; 3.0 < ΣCT / ΣAT < 20; and 3.5 < ΣCT / ΣAT < 15.

[0071] The maximum imaging height of the optical camera lens set is ImgH (which can be half of the diagonal length of the effective sensing area of the electronic photosensitive element), and the entrance pupil diameter of the optical camera lens set is EPD, which can satisfy the following condition: 1.1 < ImgH / EPD < 2.3. Thereby, it helps to balance the increase of the imaging surface and the increase of the aperture.

[0072] 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 satisfy the following condition: 0.70 < Y11 / Y82 < 1.0. Thereby, the proportion of the lens outer diameter can be adjusted, and it helps to balance the field of view, the volume distribution, and the size of the imaging surface. Please refer to Figure 18 , which shows a schematic diagram of the parameters Y11 and Y82 in the first embodiment of the present application.

[0073] The optical image capturing system set can further include an aperture. A distance between the aperture and the imaging surface on the optical axis is SL, and a distance between the first lens object side surface and the imaging surface on the optical axis is TL, which can satisfy the following condition: 0.75 < SL / TL < 0.90. In this way, the aperture position can be adjusted to help balance the view angle and the volume distribution.

[0074] 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 ith 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, and the refractive index of the ith lens is Ni. In the optical image capturing system set, at least one lens has a non-spherical object side surface and a non-spherical image side surface, and the at least one lens satisfies the following condition: 20.0 < Vi / Ni < 35.0, where i = 1, 2, 3, 4, 5, 6, 7, or 8. In this way, the lens material and the surface shape can be adjusted to help compress the lens volume and improve the image quality. In the optical image capturing system set, at least two lenses each have a non-spherical object side surface and a non-spherical image side surface, and the at least two lenses satisfy the following condition: 20.0 < Vi / Ni < 35.0, where i = 1, 2, 3, 4, 5, 6, 7, or 8.

[0075] The thickness of the sixth lens on the optical axis is CT6, and the interval distance between the fourth lens and the fifth lens on the optical axis is T45, which can satisfy the following condition: 28.0 < CT6 / T45 < 100. In this way, the lens arrangement can be adjusted to help compress the volume of the image side end of the optical image capturing system set.

[0076] The maximum single lens thickness of all the lenses in the optical image capturing system set on the optical axis is CTmax, and the maximum interval distance between all the adjacent lenses in the optical image capturing system set on the optical axis is ATmax, which can satisfy the following condition: 1.3 < CTmax / ATmax < 5.5. In this way, the lens arrangement can be adjusted to help compress the volume of the optical image capturing system set. In addition, the following condition can also be satisfied: 1.6 < CTmax / ATmax < 4.6.

[0077] The interval distance of the first lens and the second lens on the optical axis is T12, the interval distance of the second lens and the third lens on the optical axis is T23, and the thickness of the second lens on the optical axis is CT2, which can satisfy the following condition: 0.45 < (T12+T23) / CT2 < 1.5. In this way, the lens configuration can be adjusted to help increase the viewing angle and compress the volume of the object side end of the optical camera system.

[0078] The distance of the first lens object side surface to the imaging surface on the optical axis is TL, and the focal length of the optical camera system is f, which can satisfy the following condition: 4.0 < TL / f < 5.5. In this way, the balance between the total optical length and the viewing angle can be achieved.

[0079] The distance of the first lens object side surface to the imaging surface on the optical axis is TL, and the maximum imaging height of the optical camera system is ImgH, which can satisfy the following condition: 5.0 < TL / ImgH < 6.5. In this way, the balance between the total optical length and the imaging surface size can be achieved.

[0080] The maximum effective radius maximum value of all lens surfaces of the optical camera system is Ymax, and the maximum effective radius minimum value of all lens surfaces of the optical camera system is Ymin, which can satisfy the following condition: 2.0 < Ymax / Ymin < 2.5. In this way, the lens outer diameter distribution can be adjusted to help achieve a balance between increasing the aperture and compressing the volume.

[0081] The Abbe number of the sixth lens is V6, and the Abbe number of the seventh lens is V7, which can satisfy the following condition: 1.6 < V6 / V7 < 2.6. In this way, the sixth lens and the seventh lens can cooperate with each other to correct chromatic aberration.

[0082] The focal length of the optical camera system is f, and the combined focal length of the sixth lens and the seventh lens is f67, which can satisfy the following condition: -1.0 < f / f67 < 0. In this way, the sixth lens and the seventh lens can cooperate with each other to correct aberration.

[0083] The distance of the first lens object side surface to the eighth lens image side surface on the optical axis is TD, and the interval distance of the second lens and the third lens on the optical axis is T23, which can satisfy the following condition: 35.0 < TD / T23. In this way, the lens configuration can be adjusted to compress the volume. In addition, the following condition can also be satisfied: 40.0 < TD / T23 < 100.

[0084] The focal length of the optical camera system is f, and the focal length of the first lens is f1, which can satisfy the following condition: -1.0 < f / f1 < -0.60. In this way, the refractive power of the first lens can be adjusted to help achieve a balance between increasing the viewing angle and compressing the lens outer diameter.

[0085] The focal length of the optical image capturing system is f, and the focal length of the fifth lens is f5, which can satisfy the following condition: 0.30 < f / f5 < 1.0. In this way, the refractive power of the fifth lens can be adjusted to compress the volume.

[0086] 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 fifth lens is Y52, which can satisfy the following condition: 0.50 < Y11 / Y52 < 1.1. In this way, the direction of the light rays at the object side end of the optical image capturing system can be adjusted, which helps to compress the outer diameter at the object side end. Please refer to Figure 18 , which shows a schematic diagram of the parameters Y11 and Y52 according to the first embodiment of the present application.

[0087] The Abbe number of the third lens is V3, and the Abbe number of the fourth lens is V4, which can satisfy the following condition: 1.1 < V4 / V3 < 2.5. In this way, the third lens and the fourth lens can cooperate with each other to correct chromatic aberration.

[0088] The focal length of the optical image capturing system is f, and the combined focal length of the third lens and the fourth lens is f34, which can satisfy the following condition: |f / f34| < 0.25. In this way, the third lens and the fourth lens can cooperate with each other, which helps to increase the viewing angle and correct aberration.

[0089] The curvature radius of the object side surface of the first lens is R1, and the curvature radius of the image side surface of the first lens is R2, which can satisfy the following condition: 5.7 < R1 / R2. In this way, the surface shape and the refractive power of the first lens can be adjusted, which helps to increase the viewing angle. In addition, the following condition can also be satisfied: 7.2 < R1 / R2.

[0090] The F-number of the optical image capturing system is Fno, which can satisfy the following condition: 1.2 < Fno < 2.0. In this way, a balance between the illuminance and the depth of field can be achieved.

[0091] Half of the maximum viewing angle of the optical image capturing system is HFOV, which can satisfy the following condition: 40.0 [degrees] < HFOV < 70.0 [degrees]. In this way, the optical image capturing system can have the characteristic of wide viewing angle, and the aberration such as distortion caused by excessively large viewing angle can be avoided. In addition, the following condition can also be satisfied: 45.0 [degrees] < HFOV < 60.0 [degrees].

[0092] The maximum effective radius of the object side surface of the first lens is Y11, and the maximum imaging height of the optical image capturing system is ImgH, which can satisfy the following condition: 0.70 < Y11 / ImgH < 1.0. In this way, the lens outer diameter and the imaging surface size can be adjusted, which helps to achieve a balance between the viewing angle, the volume distribution, and the imaging surface size.

[0093] The radius of curvature of the object-side surface of the fifth lens is R9, and the radius of curvature of the image-side surface of the fifth lens is R10, which can satisfy the following condition: 0 < (R9+R10) / (R9-R10) < 0.50. In this way, the surface shape and the refractive power of the fifth lens can be adjusted, which helps to compress the volume.

[0094] The technical features of the optical camera system disclosed in the present application can be combined to achieve the corresponding effects.

[0095] In the optical camera system disclosed in the present application, the material of the lens can be glass or plastic. If the material of the lens is glass, the degree of freedom of the refractive power configuration of the optical camera system can be increased, and the influence of the change of the external environment temperature on imaging can be reduced. The glass lens can be manufactured by grinding or molding. If the material of the lens is plastic, the production cost can be effectively reduced. In addition, a spherical surface (SPH) or an aspherical surface (ASP) can be arranged on the lens surface. The spherical lens can reduce the manufacturing difficulty. If the aspherical surface is arranged on the lens surface, more control variables can be obtained to reduce the aberration, reduce the number of lenses, and effectively reduce the total length of the optical camera system. Further, the aspherical surface can be manufactured by plastic injection molding or molded glass lens.

[0096] In the optical camera system disclosed in the present application, if the lens surface is an aspherical surface, it means that the entire or a part of the optical effective area of the lens surface is an aspherical surface.

[0097] In the optical camera system disclosed in the present application, additives can be selectively added to any of the above lens materials to produce light absorption or light interference effects, so as to change the transmittance of the lens to specific waveband light, thereby reducing stray light and color cast. For example, the additives can have the function of filtering out 600-800 nm waveband light in the filtering system to help reduce excess red light or infrared light; or can filter out 350-450 nm waveband light to reduce excess blue light or ultraviolet light. Therefore, the additives can avoid the interference of specific waveband light on imaging. In addition, the additives can be uniformly mixed in plastic and manufactured into lenses by injection molding technology. In addition, the additives can also be configured on the coating on the lens surface to provide the above effects.

[0098] In the optical camera system disclosed in the present application, if the lens surface is a convex surface and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface. If the lens surface is a concave surface and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power or focal length of the lens is not defined, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

[0099] In the optical imaging system group disclosed in this invention, the imaging surface of the optical imaging system group can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side.

[0100] In the optical imaging system assembly disclosed in this invention, one or more imaging correction elements (such as planar elements) can be selectively disposed between the lens closest to the imaging surface and the imaging surface in the imaging optical path to achieve the effect of correcting image curvature (such as image distortion). The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, and surface type (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface in the object-side direction close to the imaging surface.

[0101] In the optical imaging system assembly disclosed in this invention, at least one element with a deflecting optical path function, such as a prism or a mirror, can be selectively arranged between the object and the imaging surface in the imaging optical path. This provides a higher degree of spatial flexibility in the spatial configuration of the optical imaging system assembly, allowing the thinning of the imaging device to be unrestricted by the total optical length of the optical imaging system assembly. For further explanation, please refer to... Figure 19 and Figure 20 ,in Figure 19 A schematic diagram illustrating an arrangement of the optical path reversing element according to the present invention in an optical imaging system assembly is provided. Figure 20 A schematic diagram illustrating another configuration of the optical path reversing element according to the present invention in an optical imaging system assembly is shown. For example... Figure 19 and Figure 20 As shown, the optical imaging system assembly can travel along the optical path from the subject (not shown) to the imaging plane IM, and sequentially includes a first optical axis OA1, an optical path deflection element LF, and a second optical axis OA2, wherein the optical path deflection element LF can be as follows: Figure 19 As shown, it is positioned between the subject and the lens group LG of the optical imaging system assembly, or as... Figure 20 The lens group LG is positioned between the imaging plane IM and the optical camera system assembly, as shown. Additionally, please refer to... Figure 21 A schematic diagram illustrating an arrangement of two optical path deflection elements according to the present invention in an optical imaging system assembly is shown, such as... Figure 21 As shown, the optical imaging system assembly can also travel along the light path from the subject (not shown) to the imaging plane IM, and sequentially includes a first optical axis OA1, a first optical path reversing element LF1, a second optical axis OA2, a second optical path reversing element LF2, and a third optical axis OA3. The first optical path reversing element LF1 is positioned between the subject and the lens group LG of the optical imaging system assembly, and the second optical path reversing element LF2 is positioned between the lens group LG of the optical imaging system assembly and the imaging plane IM. Furthermore, the direction of light travel along the first optical axis OA1 can be as follows: Figure 21The direction of the light rays is the same as the direction of the third optical axis OA3. The optical imaging system can also include more than three light path turning elements. The present application is not limited to the type, number, and position of the light path turning elements shown in the drawings.

[0102] The optical imaging system can include at least one diaphragm, which can be located before the first lens, between the lenses, or after the last lens. The diaphragm can be a glare stop or a field stop, which can reduce stray light and improve image quality.

[0103] The optical imaging system can include a front diaphragm or a middle diaphragm. The front diaphragm is located between the object and the first lens, and the middle diaphragm is located between the first lens and the image plane. The front diaphragm can increase the distance between the exit pupil and the image plane, which can improve the telecentric effect and increase the efficiency of the CCD or CMOS image sensor. The middle diaphragm can increase the field of view of the optical imaging system.

[0104] The optical imaging system can include a variable aperture element, which can be a mechanical component or a light control element. The mechanical component can include movable parts such as a blade group or a shield plate. The light control element can include a filter element, an electrochromic material, or a liquid crystal layer. The variable aperture element can control the amount of light or the exposure time to improve the image adjustment capability. In addition, the variable aperture element can be the aperture of the optical imaging system, which can adjust the image quality such as the depth of field or the exposure speed by changing the aperture value.

[0105] According to the above-mentioned embodiments, the following specific examples are proposed in detail with reference to the accompanying drawings.

[0106] <First Embodiment>

[0107] Please refer to Figures 1-2 , wherein Figure 1 The optical imaging device according to the first embodiment of the present application is shown in the schematic diagram, Figure 2 The spherical aberration, astigmatism, and distortion curves of the first embodiment are shown from left to right. The spherical aberration curve shows that the spherical aberration is small and the image quality is good. Figure 1As shown in FIG. 1, the image capturing device 1 comprises an optical imaging system (not labeled) and an electronic image sensor IS. The optical imaging system 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 E9, and an image plane IMG. The electronic image sensor IS is disposed on the image plane IMG. The optical imaging system comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8) and no other lens is interposed between the lenses.

[0108] The first lens E1 has a negative 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 concave at the vicinity of the optical axis. Both surfaces are aspherical.

[0109] The second lens E2 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 are spherical.

[0110] The third lens E3 has a negative refractive power and is made of glass. The object side surface thereof is concave at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces are spherical.

[0111] 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 are spherical, and the object side surface thereof is bonded to the image side surface of the third lens E3.

[0112] The fifth lens E5 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 are aspherical.

[0113] The sixth lens E6 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 are spherical.

[0114] The seventh lens E7 has a negative refractive power and is made of glass. The object side surface thereof is concave at the vicinity of the optical axis, and the image side surface thereof is concave at the vicinity of the optical axis. Both surfaces are spherical, and the object side surface thereof is bonded to the image side surface of the sixth lens E6.

[0115] The eighth lens E8 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 concave at the vicinity of the optical axis. Both surfaces are spherical.

[0116] The filter E9 is made of glass and is disposed between the eighth lens E8 and the image plane IMG without affecting the focal length of the optical imaging system.

[0117] The curve equation of the aspherical surface of each lens is shown as follows:

[0118]

[0119] X: displacement of the intersection point of the aspherical surface and the optical axis to the point on the aspherical surface which is Y away from the optical axis and parallel to the optical axis;

[0120] Y: perpendicular distance of the point on the aspherical surface to the optical axis;

[0121] R: radius of curvature;

[0122] k: conic coefficient; and

[0123] Ai: aspherical surface coefficient of the i-th order.

[0124] In the optical image pickup system group of the first embodiment, the focal length of the optical image pickup system group is f, the aperture value of the optical image pickup system group is Fno, and the half of the maximum view angle of the optical image pickup system group is HFOV, and the values are as follows: f = 6.04 millimeters (mm), Fno = 1.57, and HFOV = 52.5 degrees (deg.).

[0125] The Abbe number of the first lens E1 is V1, and the refractive index of the first lens E1 is N1, which satisfy the following condition: V1 / N1 = 31.41.

[0126] The Abbe number of the fifth lens E5 is V5, and the refractive index of the fifth lens E5 is N5, which satisfy the following condition: V5 / N5 = 31.41.

[0127] The Abbe number of the third lens E3 is V3, and the Abbe number of the fourth lens E4 is V4, which satisfy the following condition: V4 / V3 = 1.47.

[0128] The Abbe number of the sixth lens E6 is V6, and the Abbe number of the seventh lens E7 is V7, which satisfy the following condition: V6 / V7 = 2.13.

[0129] The interval distance of the first lens E1 and the second lens E2 on the optical axis is T12, the interval distance of the second lens E2 and the third lens E3 on the optical axis is T23, and the thickness of the second lens E2 on the optical axis is CT2, which satisfy the following condition: (T12+T23) / CT2 = 0.68. In the embodiment, the interval distance of two adjacent lenses on the optical axis refers to the interval distance between two adjacent lens surfaces of the two adjacent lenses on the optical axis.

[0130] The thickness of the sixth lens E6 on the optical axis is CT6, and the interval distance of the fourth lens E4 and the fifth lens E5 on the optical axis is T45, which satisfy the following condition: CT6 / T45 = 32.70.

[0131] A maximum value of thickness of a single lens on the optical axis among all lenses of the optical image capturing lens set is CTmax, and a maximum value of interval distance on the optical axis among all adjacent lenses of the optical image capturing lens set is ATmax, which satisfy the following condition: CTmax / ATmax = 1.83. In the present embodiment, the thickness of the eighth lens E8 on the optical axis is greater than the thickness of each of the remaining lenses of the optical image capturing lens set on the optical axis, so CTmax is equal to the thickness of the eighth lens E8 on the optical axis. In the present embodiment, the interval distance on the optical axis between the seventh lens E7 and the eighth lens E8 is greater than the interval distance on the optical axis between the remaining adjacent lenses of the optical image capturing lens set, so ATmax is equal to the interval distance on the optical axis between the seventh lens E7 and the eighth lens E8.

[0132] A distance on the optical axis between the stop ST and the imaging surface IMG is SL, and a distance on the optical axis between the object-side surface of the first lens E1 and the imaging surface IMG is TL, which satisfy the following condition: SL / TL = 0.83.

[0133] A distance on the optical axis between the object-side surface of the first lens E1 and the image-side surface of the eighth lens E8 is TD, and an interval distance on the optical axis between the second lens E2 and the third lens E3 is T23, which satisfy the following condition: TD / T23 = 66.61.

[0134] A distance on the optical axis between the object-side surface of the first lens E1 and the imaging surface IMG is TL, and a focal length of the optical image capturing lens set is f, which satisfy the following condition: TL / f = 4.93.

[0135] A distance on the optical axis between the object-side surface of the first lens E1 and the imaging surface IMG is TL, and a maximum imaging height of the optical image capturing lens set is ImgH, which satisfy the following condition: TL / ImgH = 5.79.

[0136] A sum of thicknesses on the optical axis of all lenses of the optical image capturing lens set is ΣCT, and a sum of interval distances on the optical axis of all adjacent lenses of the optical image capturing lens set is ΣAT, which satisfy the following condition: ΣCT / ΣAT = 4.34. In the present embodiment, ΣCT is the sum of the thicknesses on 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. In the present embodiment, ΣAT is the sum of the interval distances on the optical axis 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.

[0137] A radius of curvature of the object-side surface of the fifth lens E5 is R9, and a radius of curvature of the image-side surface of the fifth lens E5 is R10, which satisfy the following condition: (R9+R10) / (R9-R10) = 0.19.

[0138] The radius of curvature of the object-side surface of the first lens E1 is R1, and the radius of curvature of the image-side surface of the first lens E1 is R2, which satisfy the following condition: R1 / R2 = 8.69.

[0139] The focal length of the optical camera system group is f, and the focal length of the first lens E1 is f1, which satisfy the following condition: f / f1 = -0.69.

[0140] The focal length of the optical camera system group is f, and the focal length of the fifth lens E5 is f5, which satisfy the following condition: f / f5 = 0.67.

[0141] The focal length of the optical camera system group is f, and the combined focal length of the third lens E3 and the fourth lens E4 is f34, which satisfy the following condition: |f / f34| = 0.02.

[0142] The focal length of the optical camera system group is f, and the combined focal length of the sixth lens E6 and the seventh lens E7 is f67, which satisfy the following condition: f / f67 = -0.42.

[0143] The maximum image height of the optical camera system group is ImgH, and the entrance pupil diameter of the optical camera system group is EPD, which satisfy the following condition: ImgH / EPD = 1.34.

[0144] The maximum effective radius of the object-side surface of the first lens E1 is Y11, and the maximum image height of the optical camera system group is ImgH, which satisfy the following condition: Y11 / ImgH = 0.89.

[0145] 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 fifth lens E5 is Y52, which satisfy the following condition: Y11 / Y52 = 0.75.

[0146] 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 = 0.84.

[0147] The maximum effective radius of all lens surfaces in the optical imaging system group is Ymax, and the minimum effective radius is Ymin, which satisfies the following condition: Ymax / Ymin = 2.30. In this embodiment, the maximum effective radius of the image-side surface of the fifth lens E5 is greater than the maximum effective radius of the remaining lens surfaces in the optical imaging system group; therefore, Ymax is equal to the maximum effective radius of the image-side surface of the fifth lens E5. In this embodiment, the maximum effective radius of the object-side surface of the third lens E3 is less than the maximum effective radius of the remaining lens surfaces in the optical imaging system group; therefore, Ymin is equal to the maximum effective radius of the object-side surface of the third lens E3.

[0148] Please refer to Table 1 and Table 2 below.

[0149]

[0150]

[0151]

[0152] Table 1 is... Figure 1 The first embodiment provides detailed structural data, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 21 sequentially represent the surfaces from the object side to the image side. Table 2 shows the aspherical data in the first embodiment, where k is the cone coefficient in the aspherical curve equation, and A4 to A12 represent the 4th to 12th order aspherical coefficients of each surface. Furthermore, the tables for the following embodiments are corresponding 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 will not be repeated here.

[0153] <Second Embodiment>

[0154] Please refer to Figures 3-4 ,in Figure 3 A schematic diagram of an image-capturing device according to a second embodiment of the present invention is shown. Figure 4 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment. Figure 3 It is known that the image capturing device 2 includes an optical imaging system assembly (unlabeled) and an electronic photosensitive element IS. The optical imaging system assembly, arranged sequentially from the object side to the image side along the optical path, includes 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 seventh lens E7, an aperture stop S1, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical imaging system assembly includes eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between the lenses.

[0155] The first lens E1 has a negative refractive power, and is made of glass. 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.

[0156] The second lens E2 has a positive refractive power, and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are spherical.

[0157] The third lens E3 has a negative refractive power, and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are spherical.

[0158] The fourth lens E4 has a positive refractive power, and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are spherical.

[0159] The fifth lens E5 has a positive refractive power, and is made of glass. 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.

[0160] The sixth lens E6 has a positive refractive power, and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both surfaces are spherical.

[0161] The seventh lens E7 has a negative refractive power, and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are spherical. Its object-side surface is bonded to the image-side surface of the sixth lens E6.

[0162] The eighth lens E8 has a positive refractive power, and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both surfaces are spherical.

[0163] The filter element 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 camera system group.

[0164] Please refer to the following Table 3 and Table 4.

[0165]

[0166]

[0167] In the second embodiment, the aspherical surface is represented by a curve equation in the form of the first embodiment. In addition, the definitions described in the following tables are the same as those in the first embodiment, and are not described here.

[0168]

[0169] <Third Embodiment>

[0170] Please refer to Figures 5-6 ,in Figure 5 A schematic diagram of an image-capturing device according to a third embodiment of the present invention is shown. Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment. Figure 5 It is known that the image capturing device 3 includes an optical imaging system assembly (unlabeled) and an electronic photosensitive element IS. The optical imaging system assembly, arranged sequentially from the object side to the image side along the optical path, includes 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 seventh lens E7, an aperture stop S1, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical imaging system assembly includes eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between the lenses.

[0171] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0172] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is flat near the optical axis, its image-side surface is convex near the optical axis, and its image-side surface is spherical.

[0173] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0174] The fourth lens E4 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical, and its object-side surface is bonded to the image-side surface of the third lens E3.

[0175] The fifth lens, E5, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are aspherical.

[0176] The sixth lens, E6, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0177] The seventh lens E7 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical, and its object-side surface is bonded to the image-side surface of the sixth lens E6.

[0178] The eighth lens, E8, has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0179] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the optical imaging system group.

[0180] Please refer to Table 5 and Table 6 below.

[0181]

[0182]

[0183]

[0184] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0185]

[0186] <Fourth Embodiment>

[0187] Please refer to Figures 7-8 ,in Figure 7 A schematic diagram of an image-capturing device according to a fourth embodiment of the present invention is shown. Figure 8 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. Figure 7 It is known that the image capturing device 4 includes an optical imaging system assembly (unlabeled) and an electronic photosensitive element IS. The optical imaging system assembly, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, a fifth lens E5, an aperture stop S1, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical imaging system assembly includes eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between the lenses.

[0188] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0189] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0190] The third lens E3 has a negative refractive power, is made of glass, and has a concave object side surface and a concave image side surface near the optical axis, both of which are spherical surfaces.

[0191] The fourth lens E4 has a positive refractive power, is made of glass, and has a convex object side surface and a convex image side surface near the optical axis, both of which are spherical surfaces, and the object side surface of the fourth lens E4 is bonded to the image side surface of the third lens E3.

[0192] The fifth lens E5 has a positive refractive power, is made of glass, and has a convex object side surface and a convex image side surface near the optical axis, both of which are aspherical surfaces.

[0193] The sixth lens E6 has a positive refractive power, is made of glass, and has a convex object side surface and a convex image side surface near the optical axis, both of which are spherical surfaces.

[0194] The seventh lens E7 has a negative refractive power, is made of glass, and has a concave object side surface and a concave image side surface near the optical axis, both of which are spherical surfaces, and the object side surface of the seventh lens E7 is bonded to the image side surface of the sixth lens E6.

[0195] The eighth lens E8 has a positive refractive power, is made of glass, and has a convex object side surface and a concave image side surface near the optical axis, both of which are spherical surfaces.

[0196] The filter element E9 is made of glass, is disposed between the eighth lens E8 and the imaging surface IMG, and does not affect the focal length of the optical camera system.

[0197] Please refer to the following Table 7 and Table 8.

[0198]

[0199]

[0200] In the fourth embodiment, the curve equation of the aspherical surface is in the form 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 here.

[0201]

[0202]

[0203] <The fifth embodiment>

[0204] Please refer to Figures 9-10 wherein Figure 9 a schematic diagram of an image capturing device according to the fifth embodiment of the present application is shown, Figure 10The ball aberration, the coma, and the distortion curves of the fifth embodiment are sequentially shown from left to right. The ball aberration, the coma, and the distortion curves of the fifth embodiment are sequentially shown from left to right. Figure 9 It is known that the image capturing device 5 comprises an optical camera system set (not labeled separately) and an electronic photosensitive element IS. The optical camera system set comprises, in sequence 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 fifth lens E5, a diaphragm S1, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic photosensitive element IS is arranged on the imaging surface IMG. The optical camera system set comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there is no other lens interposed between each lens.

[0205] The first lens E1 has a negative refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a concave image side surface at the vicinity of the optical axis. Both surfaces of the first lens E1 are aspherical surfaces.

[0206] The second lens E2 has a positive refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a convex image side surface at the vicinity of the optical axis. Both surfaces of the second lens E2 are spherical surfaces.

[0207] The third lens E3 has a negative refractive power, is made of glass, and has a concave object side surface at the vicinity of the optical axis and a concave image side surface at the vicinity of the optical axis. Both surfaces of the third lens E3 are spherical surfaces.

[0208] The fourth lens E4 has a positive refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a convex image side surface at the vicinity of the optical axis. Both surfaces of the fourth lens E4 are spherical surfaces, and the object side surface of the fourth lens E4 is bonded to the image side surface of the third lens E3.

[0209] The fifth lens E5 has a positive refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a convex image side surface at the vicinity of the optical axis. Both surfaces of the fifth lens E5 are spherical surfaces.

[0210] The sixth lens E6 has a positive refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a convex image side surface at the vicinity of the optical axis. Both surfaces of the sixth lens E6 are spherical surfaces.

[0211] The seventh lens E7 has a negative refractive power, is made of glass, and has a concave object side surface at the vicinity of the optical axis and a concave image side surface at the vicinity of the optical axis. Both surfaces of the seventh lens E7 are spherical surfaces, and the object side surface of the seventh lens E7 is bonded to the image side surface of the sixth lens E6.

[0212] The eighth lens E8 has a positive refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a concave image side surface at the vicinity of the optical axis. Both surfaces of the eighth lens E8 are spherical surfaces.

[0213] The filter element E9 is made of glass and is located between the eighth lens E8 and the imaging surface IMG. It does not affect the focal length of the optical imaging system group.

[0214] Please refer to Tables 9 and 10 below.

[0215]

[0216]

[0217] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0218]

[0219] <Sixth Embodiment>

[0220] Please refer to Figures 11-12 ,in Figure 11 A schematic diagram of an image-capturing device according to a sixth embodiment of the present invention is shown. Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment. Figure 11 It is known that the image capturing device 6 includes an optical imaging system assembly (unlabeled) and an electronic photosensitive element IS. The optical imaging system assembly, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, an aperture stop S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical imaging system assembly includes eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between the lenses.

[0221] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0222] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0223] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is convex near the optical axis. Both of its surfaces are spherical.

[0224] The fourth lens E4 has positive refractive power, is made of glass, and has a concave surface on the object side near the optical axis and a convex surface on the image side near the optical axis. Both surfaces are spherical, and the surface on the object side is bonded to the surface on the image side of the third lens E3.

[0225] The fifth lens E5 has positive refractive power, is made of glass, and has a convex surface on the object side near the optical axis and a convex surface on the image side near the optical axis. Both surfaces are aspherical.

[0226] The sixth lens E6 has positive refractive power, is made of glass, and has a concave surface on the object side near the optical axis and a convex surface on the image side near the optical axis. Both surfaces are spherical.

[0227] The seventh lens E7 has negative refractive power, is made of glass, and has a concave surface on the object side near the optical axis and a concave surface on the image side near the optical axis. Both surfaces are spherical, and the surface on the object side is bonded to the surface on the image side of the sixth lens E6.

[0228] The eighth lens E8 has positive refractive power, is made of glass, and has a convex surface on the object side near the optical axis and a convex surface on the image side near the optical axis. Both surfaces are spherical.

[0229] The filter element E9 is made of glass, is disposed between the eighth lens E8 and the imaging surface IMG, and does not affect the focal length of the optical camera system.

[0230] Please refer to Table XI and Table XII below.

[0231]

[0232]

[0233]

[0234] In the sixth embodiment, the aspherical surface is expressed in the form 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 here.

[0235]

[0236] <Seventh Embodiment>

[0237] Please refer to Figures 13-14 wherein Figure 13 A schematic diagram of an image pickup apparatus according to the seventh embodiment of the present application is shown in Figure 14 The graphs from left to right are the curves of the spherical aberration, the astigmatism, and the distortion of the seventh embodiment. From the graphs, it can be seen that the image pickup apparatus of the seventh embodiment has good optical performance. Figure 13It is known that the image capturing device 7 comprises an optical camera system set (not labeled separately) and an electronic photosensitive element IS. The optical camera system set 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 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 element E9, and an imaging surface IMG. The electronic photosensitive element IS is arranged on the imaging surface IMG. The optical camera system set comprises eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there is no other lens interposed between the lenses.

[0238] The first lens E1 has a negative refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a concave image side surface at the vicinity of the optical axis. Both surfaces of the first lens E1 are aspherical surfaces.

[0239] The second lens E2 has a negative refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a concave image side surface at the vicinity of the optical axis. Both surfaces of the second lens E2 are spherical surfaces.

[0240] The third lens E3 has a negative refractive power, is made of glass, and has a concave object side surface at the vicinity of the optical axis and a concave image side surface at the vicinity of the optical axis. Both surfaces of the third lens E3 are spherical surfaces.

[0241] The fourth lens E4 has a positive refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a convex image side surface at the vicinity of the optical axis. Both surfaces of the fourth lens E4 are spherical surfaces, and the object side surface of the fourth lens E4 is bonded to the image side surface of the third lens E3.

[0242] The fifth lens E5 has a positive refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a convex image side surface at the vicinity of the optical axis. Both surfaces of the fifth lens E5 are aspherical surfaces.

[0243] The sixth lens E6 has a positive refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a convex image side surface at the vicinity of the optical axis. Both surfaces of the sixth lens E6 are spherical surfaces.

[0244] The seventh lens E7 has a negative refractive power, is made of glass, and has a concave object side surface at the vicinity of the optical axis and a concave image side surface at the vicinity of the optical axis. Both surfaces of the seventh lens E7 are spherical surfaces, and the object side surface of the seventh lens E7 is bonded to the image side surface of the sixth lens E6.

[0245] The eighth lens E8 has a positive refractive power, is made of glass, and has a convex object side surface at the vicinity of the optical axis and a concave image side surface at the vicinity of the optical axis. Both surfaces of the eighth lens E8 are spherical surfaces.

[0246] The filter element E9 is made of glass, is arranged between the eighth lens E8 and the imaging surface IMG, and does not affect the focal length of the optical camera system set.

[0247] Please refer to Tables 13 and 14 below.

[0248]

[0249]

[0250] In the seventh embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0251]

[0252]

[0253] <Eighth Embodiment>

[0254] Please refer to Figures 15-16 ,in Figure 15 A schematic diagram of an image-capturing device according to an eighth embodiment of the present invention is shown. Figure 16 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the eighth embodiment. Figure 15 It is known that the image capturing device 8 includes an optical imaging system assembly (unlabeled) and an electronic photosensitive element IS. The optical imaging system assembly, arranged sequentially from the object side to the image side along the optical path, includes a first lens E1, a second lens E2, an aperture ST, a third lens E3, a fourth lens E4, an aperture stop S1, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter element E9, and an imaging surface IMG. The electronic photosensitive element IS is disposed on the imaging surface IMG. The optical imaging system assembly includes eight lenses (E1, E2, E3, E4, E5, E6, E7, E8), and there are no other interposed lenses between the lenses.

[0255] The first lens E1 has negative refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are aspherical.

[0256] The second lens E2 has positive refractive power and is made of glass. Its object-side surface is convex near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0257] The third lens E3 has negative refractive power and is made of glass. Its object-side surface is concave near the optical axis, and its image-side surface is concave near the optical axis. Both of its surfaces are spherical.

[0258] The fourth lens E4 has positive refractive power, is made of glass, and has a convex surface on the object side near the optical axis and a convex surface on the image side near the optical axis. Both surfaces are spherical, and the surface on the object side is bonded to the surface on the image side of the third lens E3.

[0259] The fifth lens E5 has positive refractive power, is made of glass, and has a convex surface on the object side near the optical axis and a convex surface on the image side near the optical axis. Both surfaces are aspherical.

[0260] The sixth lens E6 has positive refractive power, is made of glass, and has a convex surface on the object side near the optical axis and a convex surface on the image side near the optical axis. Both surfaces are spherical.

[0261] The seventh lens E7 has negative refractive power, is made of glass, and has a concave surface on the object side near the optical axis and a concave surface on the image side near the optical axis. Both surfaces are spherical, and the surface on the object side is bonded to the surface on the image side of the sixth lens E6.

[0262] The eighth lens E8 has negative refractive power, is made of glass, and has a concave surface on the object side near the optical axis and a plane surface on the image side near the optical axis. The surface on the object side is spherical.

[0263] The filter element E9 is made of glass, is disposed between the eighth lens E8 and the imaging plane IMG, and does not affect the focal length of the optical camera system.

[0264] Please refer to Table 15 and Table 16 below.

[0265]

[0266]

[0267] In the eighth embodiment, the aspherical surface is expressed in the form 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 here.

[0268]

[0269] <The ninth embodiment>

[0270] Please refer to Figure 17, a configuration schematic diagram of an image capturing device according to a ninth embodiment of the present application is shown. In the present embodiment, the image capturing device 100 is a camera module. The image capturing device 100 comprises an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module (not shown separately). The imaging lens comprises the optical image capturing system group of the first embodiment described above, a lens barrel for carrying the optical image capturing system group, and a holder member. The imaging lens can also be configured with the optical image capturing system group of other embodiments described above, and the present application is not limited in this regard. The image capturing device 100 generates an image using the light collected by the imaging lens, and performs image focusing with the driving device, and finally forms an image on the electronic photosensitive element and can be output as image data.

[0271] The driving device can have an auto-focus function, and the driving method can use 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 can allow the imaging lens to achieve a better imaging position, and can provide clear images of the subject at different object distances. In addition, the image capturing device 100 is equipped with an electronic photosensitive element (such as CMOS, CCD) with good sensitivity and low noise, which is arranged on the imaging surface of the optical image capturing system group, and can truly present the good imaging quality of the optical image capturing system group.

[0272] The image stabilization module is, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The driving device can be combined with the image stabilization module to function as an optical image stabilization (OIS) device, which adjusts the changes in different axes of the imaging lens to compensate for blurred images caused by shaking during shooting, or uses image compensation technology in image software to provide electronic image stabilization (EIS) function, further improving the imaging quality of dynamic and low-light scene shooting.

[0273] The image capturing device 100 is a wide-angle image capturing device, and the number of image capturing devices is multiple, which are respectively arranged at the front end, rear end, side, rearview mirror, and interior of the car CAR, as shown in Figure 17 for detecting the surrounding environment of the car CAR, and can be communicatively connected to the processing system of the car CAR to serve as an auxiliary driving and autonomous driving function. It is worth noting that Figure 17 the arrangement position of the image capturing device 100 in the above is only an example, and in fact, the number, position, and orientation of the image capturing device 100 can be adjusted according to the use requirements.

[0274] In addition, the image capturing device 100 can have a light path turning element configured, for example, in a structure similar to Figures 19-21 , and the description of the above-mentioned corresponding Figures 19-21 will not be repeated here.

[0275] The image capturing device of the present application is not limited to be applied to a car. The image capturing device can be applied to a system with mobile focusing, and has the features of good aberration correction and good imaging quality. For example, the image capturing device can be applied to various electronic devices such as a three-dimensional (3D) image capturing device, a digital camera, a mobile device, a tablet computer, a smart television, a network monitoring device, a smart phone, a multi-lens device, an identification system, a motion game machine, and a wearable device. The above-mentioned electronic devices are only exemplary to illustrate the practical application examples of the present application, and are not intended to limit the application range of the image capturing device of the present application.

[0276] Although the present application has been disclosed with the above-mentioned preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present application. Therefore, the patent protection scope of the present application should be defined by the protection scope of the claims attached to the present specification.

Claims

1. An optical camera system group, characterized by, The eight lenses sequentially include 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 along an optical path from an object side to an image side, and each of the eight lenses has an object side surface facing the object side direction and an image side surface facing the image side direction; The total number of lenses in the optical camera system group is eight, the first lens has negative refractive power, the third lens has negative refractive power, the object side surface of the third lens is concave at a vicinity of the optical axis, the fourth lens has positive refractive power, the fifth lens has positive refractive power, the image side surface of the fifth lens is convex at a vicinity of the optical axis, the sixth lens has positive refractive power, the seventh lens has negative refractive power, and the image side surface of the seventh lens is concave at a vicinity of the optical axis; The total sum of thicknesses of all lenses in the optical camera system group on the optical axis is ΣCT, the total sum of interval distances of all adjacent lenses in the optical camera system group on the optical axis is ΣAT, 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 interval distance of the second lens and the third lens on the optical axis is T23, which satisfy the following conditions: 3.0 < ΣCT / ΣAT; and 35.0 < TD / T23.

2. The optical camera system group according to claim 1, characterized in that The total sum of thicknesses of all lenses in the optical camera system group on the optical axis is ΣCT, the total sum of interval distances of all adjacent lenses in the optical camera system group on the optical axis is ΣAT, which satisfy the following condition: 3.5 < ΣCT / ΣAT < 15.

3. The optical camera system group according to claim 1, wherein The maximum imaging height of the optical camera system group is ImgH, and the entrance pupil diameter of the optical camera system group is EPD, which satisfy the following condition: 1.1 < ImgH / EPD < 2.

3.

4. The optical camera system group according to claim 1, wherein 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 satisfy the following condition: 0.70 < Y11 / Y82 < 1.

0.

5. The optical camera system group according to claim 1, wherein Further comprising an aperture, wherein the object side surface of the seventh lens is concave at a vicinity of the optical axis; The distance from the aperture to an imaging surface on the optical axis is SL, and the distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, which satisfy the following condition: 0.75 < SL / TL < 0.

90.

6. The optical camera system group according to claim 1, wherein Abbe number of the first lens is V1, Abbe number of the second lens is V2, Abbe number of the third lens is V3, Abbe number of the fourth lens is V4, Abbe number of the fifth lens is V5, Abbe number of the sixth lens is V6, Abbe number of the seventh lens is V7, Abbe number of the eighth lens is V8, Abbe number of the ith lens is Vi, refractive index of the first lens is N1, refractive index of the second lens is N2, refractive index of the third lens is N3, refractive index of the fourth lens is N4, refractive index of the fifth lens is N5, refractive index of the sixth lens is N6, refractive index of the seventh lens is N7, refractive index of the eighth lens is N8, refractive index of the ith lens is Ni, at least one lens in the optical camera system has both a non-spherical object side surface and a non-spherical image side surface, and the at least one lens satisfies the following conditions: 20.0 < Vi / Ni < 35.0, where i = 1, 2, 3, 4, 5, 6, 7, or 8.

7. An optical camera system group, characterized by comprising: The optical camera system includes eight lenses, which 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, and each of the eight lenses has an object side surface facing in an object side direction and an image side surface facing in an image side direction. The optical camera system includes eight lenses, which 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, and each of the eight lenses has an object side surface facing in an object side direction and an image side surface facing in an image side direction. The optical camera system includes eight lenses, which 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, and each of the eight lenses has an object side surface facing in an object side direction and an image side surface facing in an image side direction. The optical camera system includes eight lenses, which 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, and each of the eight lenses has an object side surface facing in an object side direction and an image side surface facing in an image side direction. 2.5 < ΣCT / ΣAT; and 8. The optical camera system group according to claim 7, wherein 35.0 < TD / T23. The optical camera system includes eight lenses, which 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, and each of the eight lenses has an object side surface facing in an object side direction and an image side surface facing in an image side direction.

9. The optical camera system group according to claim 7, wherein 3.0 < ΣCT / ΣAT < 20. The optical camera system includes eight lenses, which 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, and each of the eight lenses has an object side surface facing in an object side direction and an image side surface facing in an image side direction.

10. The optical camera system group according to claim 7, wherein The optical camera system includes eight lenses, which 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, and each of the eight lenses has an object side surface facing in an object side direction and an image side surface facing in an image side direction. 1.3 < CTmax / ATmax < 5.

5.

11. The optical camera system group according to claim 7, wherein a separation distance on the optical axis between the first lens and the second lens is T12, a separation distance on the optical axis between the second lens and the third lens is T23, and a thickness of the second lens on the optical axis is CT2, which satisfy the following conditions: 0.45 < (T12+T23) / CT2 < 1.

5.

12. The optical camera system set according to claim 7, wherein a distance on the optical axis between the first lens object-side surface and an imaging plane is TL, a focal length of the optical camera system group is f, and a maximum imaging height of the optical camera system group is ImgH, which satisfy the following conditions: 4.0 < TL / f < 5.5; and 5.0 < TL / ImgH < 6.

5.

13. The optical camera system group according to claim 7, wherein a maximum effective radius maximum value in all lens surfaces of the optical camera system group is Ymax, and a minimum effective radius minimum value in all lens surfaces of the optical camera system group is Ymin, which satisfy the following condition: 2.0 < Ymax / Ymin < 2.

5.

14. The optical camera system group according to claim 7, wherein the sixth lens and the seventh lens are bonded together; wherein an Abbe number of the sixth lens is V6, an Abbe number of the seventh lens is V7, a focal length of the optical camera system group is f, and a combined focal length of the sixth lens and the seventh lens is f67, which satisfy the following conditions: 1.6 < V6 / V7 < 2.6; and -1.0 < f / f67 < 0.

15. The optical camera system group according to claim 7, wherein the first lens object-side surface is convex at a vicinity of the optical axis, the first lens image-side surface is concave at a vicinity of the optical axis, the fourth lens image-side surface is convex at a vicinity of the optical axis, and the fifth lens object-side surface is convex at a vicinity of the optical axis.

16. An optical camera system set, characterized by comprises eight lenses, which 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, and each of the eight lenses has an object-side surface facing an object side direction and an image-side surface facing an image side direction; wherein a total number of lenses in the optical camera system group is eight, the first lens has a negative refractive power, the third lens has a negative refractive power, a third lens object-side surface is concave at a vicinity of the optical axis, the fourth lens has a positive refractive power, the fifth lens has a positive refractive power, the sixth lens has a positive refractive power, the seventh lens has a negative refractive power, and a seventh lens image-side surface is concave at a vicinity of the optical axis; wherein a total sum of thicknesses on the optical axis of all lenses in the optical camera system group is ΣCT, a total sum of separation distances on the optical axis of all adjacent lenses in the optical camera system group is ΣAT, a distance on the optical axis between the first lens object-side surface and the eighth lens image-side surface is TD, and a separation distance on the optical axis between the second lens and the third lens is T23, which satisfy the following conditions: 2.5 < ΣCT / ΣAT; and 35.0 < TD / T23.

17. The optical camera system group according to claim 16, wherein A sum of thicknesses of all lenses in the optical camera system group on the optical axis is ΣCT, and a sum of interval distances of all adjacent lenses in the optical camera system group on the optical axis is ΣAT, which satisfy the following condition: 3.0 < ΣCT / ΣAT < 20.

18. The optical camera system set of claim 16, wherein, A distance of the first lens object side surface to the eighth lens image side surface on the optical axis is TD, and an interval distance of the second lens and the third lens on the optical axis is T23, which satisfy the following condition: 40.0 < TD / T23 < 100.

19. The optical camera system set of claim 16, wherein, A focal length of the optical camera system group is f, a focal length of the first lens is f1, and a focal length of the fifth lens is f5, which satisfy the following conditions: -1.0 < f / f1 < -0.60; and 0.30 < f / f5 < 1.

0.

20. The optical camera system set of claim 16, wherein, A maximum effective radius of the first lens object side surface is Y11, and a maximum effective radius of the fifth lens image side surface is Y52, which satisfy the following condition: 0.50 < Y11 / Y52 < 1.

1.

21. The optical camera system set of claim 16, wherein, The third lens and the fourth lens are bonded; Wherein, an Abbe number of the third lens is V3, an Abbe number of the fourth lens is V4, a focal length of the optical camera system group is f, and a combined focal length of the third lens and the fourth lens is f34, which satisfy the following conditions: 1.1 < V4 / V3 < 2.5; and |f / f34| < 0.

25.

22. The optical camera system set of claim 16, wherein, The first lens object side surface is convex at a vicinity of the optical axis, and the first lens image side surface is concave at the vicinity of the optical axis; Wherein, a curvature radius of the first lens object side surface is R1, and a curvature radius of the first lens image side surface is R2, which satisfy the following condition: 5.7 < R1 / R2.

23. The optical camera system set of claim 16, wherein, The fourth lens image side surface is convex at a vicinity of the optical axis; Wherein, an aperture value of the optical camera system group is Fno, and a half of a maximum view angle of the optical camera system group is HFOV, which satisfy the following conditions: 1.2 < Fno < 2.0; and 40.0 [degrees] < HFOV < 70.0 [degrees].

24. The optical camera system set of claim 16, wherein, The fifth lens object side surface is convex at a vicinity of the optical axis; Wherein, a maximum effective radius of the first lens object side surface is Y11, and a maximum imaging height of the optical camera system group is ImgH, which satisfy the following condition: 0.70 < Y11 / ImgH < 1.

0.

25. The optical camera system set of claim 16, wherein, The fifth lens object side surface is convex at a vicinity of the optical axis, and the fifth lens image side surface is convex at the vicinity of the optical axis; Wherein, a curvature radius of the fifth lens object side surface is R9, and a curvature radius of the fifth lens image side surface is R10, which satisfy the following condition: 0 < (R9+R10) / (R9-R10) < 0.

50.

26. An image taking device, characterized by Comprising: The optical camera system group according to claim 16; and An electronic photosensitive element disposed on an imaging plane of the optical camera system group.

Images