CN110412746B - Optical lens assembly for image capturing, image capturing device and electronic device - Google Patents

Abstract

The invention discloses an optical lens assembly for shooting, an image capturing device and an electronic device. The image capturing optical lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex at a paraxial region thereof. At least one of the object-side surface and the image-side surface of the sixth lens element is aspheric, and at least one of the surfaces includes at least one inflection point. At least one of the object-side surface and the image-side surface of the seventh lens element is aspheric. When the specific conditions are satisfied, the optical lens assembly for photographing can have the function of telescope, the function of reducing aberration, and the total length can be effectively controlled, so as to meet the requirement of miniaturization. The invention also discloses an image capturing device with the optical lens group for shooting and an electronic device with the image capturing device.

Description

Optical lens assembly for image capturing, image capturing device and electronic device

The present application is a divisional application of patent applications entitled "optical lens assembly for image pickup, image pickup device, and electronic device" filed 2016, 04/02/2016.

Technical Field

The present invention relates to an optical lens assembly for photographing and an image capturing device, and more particularly, to a miniaturized optical lens assembly for photographing and an image capturing device applied to an electronic device.

Background

As the application of the camera module is becoming more and more extensive, it is a great trend of future technology development to install the camera module in various intelligent electronic products, car devices, identification systems, entertainment devices, sports devices and home intelligent auxiliary systems. In order to have a wider experience, an intelligent device with more than one lens is becoming the mainstream of the market, and lens systems with different characteristics are developed to meet different application requirements.

The conventional micro lens mostly focuses on the pursuit of miniaturization, so the imaging quality is often sacrificed. In the market, the high-quality imaging system mostly adopts a multi-piece structure and carries a spherical glass lens, and such configuration not only causes the lens to have too large volume and be difficult to carry, but also causes the product unit price to be too high and is not beneficial to the application of various devices and products, so the known optical system cannot meet the trend of the current technological development.

Disclosure of Invention

The invention provides an optical lens assembly for shooting, an image capturing device and an electronic device, wherein the first lens element has positive refractive power, and the sixth lens element comprises an inflection point, so that the main converging capability of the optical lens assembly for shooting can be provided, the space of the optical lens assembly for shooting can be effectively compressed, the requirement of miniaturization can be met, the peripheral aberration of the optical lens assembly for shooting can be corrected, the rear focal length of the optical lens assembly can be compressed, and the balance between the imaging quality and the volume can be obtained.

According to the present invention, an optical lens assembly for photographing includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element. The first lens element with positive refractive power has an object-side surface being convex at a paraxial region thereof. The sixth lens element with negative refractive power has an image-side surface being concave at a paraxial region thereof, at least one of an object-side surface and the image-side surface of the sixth lens element is aspheric, and at least one of the object-side surface and the image-side surface of the sixth lens element includes at least one inflection point. At least one of the object-side surface and the image-side surface of the seventh lens element is aspheric. The total number of the lenses in the optical lens assembly for image pickup is seven, and the lenses do not move relatively to each other, the abbe number of at least one lens element with positive refractive power in the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element is less than 25, the focal length of the optical lens assembly for image pickup is f, the curvature radius of the object-side surface of the first lens element is R1, and the maximum image height of the optical lens assembly for image pickup is ImgH, which satisfies the following conditions:

2.85< f/R1; and

2.20<f/ImgH<5.50。

according to the present invention, an image capturing device is further provided, which comprises the image capturing optical lens assembly as described in the previous paragraph and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an image plane of the image capturing optical lens assembly.

According to another aspect of the present invention, an electronic device includes the image capturing device as described in the previous paragraph.

When the f/R1 satisfies the above conditions, the optical lens assembly for photographing can have a telescopic function and can effectively control the total length to achieve the requirement of miniaturization.

When the f/ImgH meets the conditions, the method can help to control the shooting range and effectively control the view field angle so as to improve the resolution of the local range of the image and achieve better long-range shooting effect.

Drawings

Fig. 1 is a schematic view illustrating an image capturing apparatus according to a first embodiment of the invention;

FIG. 2 is a graph showing the spherical aberration, astigmatism and distortion of the first embodiment in order from left to right;

FIG. 3 is a schematic view illustrating an image capturing device according to a second embodiment of the present invention;

FIG. 4 is a graph showing the spherical aberration, astigmatism and distortion of the second embodiment in order from left to right;

FIG. 5 is a schematic view illustrating an image capturing apparatus according to a third embodiment of the present invention;

FIG. 6 is a graph showing the spherical aberration, astigmatism and distortion of the third embodiment in order from left to right;

FIG. 7 is a schematic view illustrating an image capturing apparatus according to a fourth embodiment of the present invention;

FIG. 8 is a graph showing the spherical aberration, astigmatism and distortion of the fourth embodiment in order from left to right;

fig. 9 is a schematic view illustrating an image capturing apparatus according to a fifth embodiment of the invention;

FIG. 10 is a graph showing the spherical aberration, astigmatism and distortion of the fifth embodiment in order from left to right;

fig. 11 is a schematic view illustrating an image capturing apparatus according to a sixth embodiment of the invention;

FIG. 12 is a graph showing spherical aberration, astigmatism and distortion curves of the sixth embodiment, in order from left to right;

fig. 13 is a schematic view illustrating an image capturing apparatus according to a seventh embodiment of the invention;

FIG. 14 is a graph showing the spherical aberration, astigmatism and distortion of the seventh embodiment in order from left to right;

fig. 15 is a schematic view illustrating an image capturing apparatus according to an eighth embodiment of the present invention;

FIG. 16 is a graph showing the spherical aberration, astigmatism and distortion of the eighth embodiment in order from left to right;

fig. 17 is a schematic view illustrating an image capturing apparatus according to a ninth embodiment of the invention;

FIG. 18 is a graph showing spherical aberration, astigmatism and distortion curves of the ninth embodiment, in order from left to right;

fig. 19 is a schematic view illustrating an image capturing apparatus according to a tenth embodiment of the invention;

FIG. 20 is a graph showing the spherical aberration, astigmatism and distortion of the tenth embodiment in order from left to right;

fig. 21 is a schematic view illustrating an image capturing apparatus according to an eleventh embodiment of the invention;

FIG. 22 is a graph showing spherical aberration, astigmatism and distortion curves of the eleventh embodiment, in order from left to right;

FIG. 23 is a diagram illustrating the parameter Yc62 according to the first embodiment of FIG. 1;

FIG. 24 is a diagram illustrating a parameter Dr1s according to the first embodiment of FIG. 1;

FIG. 25 is a diagram illustrating the parameter Y11 according to the first embodiment of FIG. 1;

FIG. 26 is a schematic view of an electronic device according to a twelfth embodiment of the invention;

FIG. 27 is a schematic view of an electronic device according to a thirteenth embodiment of the invention; and

fig. 28 is a schematic view illustrating an electronic device according to a fourteenth embodiment of the invention.

[ notation ] to show

An electronic device: 10. 20, 30

An image taking device: 11. 21, 31

Aperture: 100. 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100

A first lens: 110. 210, 310, 410, 510, 610, 710, 810, 910, 1010, 1110

An object-side surface: 111. 211, 311, 411, 511, 611, 711, 811, 911, 1011, 1111

Image-side surface: 112. 212, 312, 412, 512, 612, 712, 812, 912, 1012, 1112

A second lens: 120. 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120

An object-side surface: 121. 221, 321, 421, 521, 621, 721, 821, 921, 1021, 1121

Image-side surface: 122. 222, 322, 422, 522, 622, 722, 822, 922, 1022, 1122

A third lens: 130. 230, 330, 430, 530, 630, 730, 830, 930, 1030, 1130

An object-side surface: 131. 231, 331, 431, 531, 631, 731, 831, 931, 1031, 1131

Image-side surface: 132. 232, 332, 432, 532, 632, 732, 832, 932, 1032, 1132

A fourth lens: 140. 240, 340, 440, 540, 640, 740, 840, 940, 1040, 1140

An object-side surface: 141. 241, 341, 441, 541, 641, 741, 841, 941, 1041, 1141

Image-side surface: 142. 242, 342, 442, 542, 642, 742, 842, 942, 1042, 1142

A fifth lens: 150. 250, 350, 450, 550, 650, 750, 850, 950, 1050, 1150

An object-side surface: 151. 251, 351, 451, 551, 651, 751, 851, 951, 1051, 1151

Image-side surface: 152. 252, 352, 452, 552, 652, 752, 852, 952, 1052, 1152

A sixth lens: 160. 260, 360, 460, 560, 660, 760, 860, 960, 1060, 1160

An object-side surface: 161. 261, 361, 461, 561, 661, 761, 861, 961, 1061, 1161

Image-side surface: 162. 262, 362, 462, 562, 662, 762, 862, 962, 1062, 1162

A seventh lens: 170. 270, 370, 470, 570, 670, 770, 870, 970, 1070, 1170, and

an object-side surface: 171. 271, 371, 471, 571, 671, 771, 871, 971, 1071, 1171

Image-side surface: 172. 272, 372, 472, 572, 672, 772, 872, 972, 1072, 1172

Infrared ray filtering filter element: 180. 280, 380, 480, 580, 680, 780, 880, 980, 1080, 1180

Imaging surface: 190. 290, 390, 490, 590, 690, 790, 890, 990, 1090, 1190

An electron-sensitive element: 195. 295, 395, 495, 595, 695, 795, 895, 995, 1095, 1195

f: focal length of optical lens group for image pickup

Fno: aperture value of optical lens group for image pickup

HFOV: half of maximum visual angle in optical lens group for image pickup

V7: abbe number of seventh lens

R1: radius of curvature of object-side surface of first lens

R14: radius of curvature of image-side surface of seventh lens

CT 1: thickness of the first lens on the optical axis

CT 2: thickness of the second lens on the optical axis

CT 6: thickness of the sixth lens element on the optical axis

T12: the distance between the first lens and the second lens on the optical axis

T23: the second lens and the third lens are spaced at a distance on the optical axis

T34: the third lens and the fourth lens are spaced at a distance on the optical axis

T45: the fourth lens and the fifth lens are separated by a distance on the optical axis

T56: the distance between the fifth lens and the sixth lens on the optical axis

T67: the sixth lens and the seventh lens are separated by a distance on the optical axis

Σ AT: the sum of the distances between two adjacent lenses on the optical axis

f 1: focal length of the first lens

f 2: focal length of the second lens

f 3: focal length of the third lens

f 4: focal length of the fourth lens

f 5: focal length of fifth lens

f 6: focal length of sixth lens

f 7: focal length of seventh lens

P1: refractive power of the first lens element

P2: refractive power of the second lens element

P3: refractive power of the third lens element

P4: refractive power of the fourth lens element

P5: refractive power of the fifth lens element

P6: refractive power of the sixth lens element

P7: refractive power of the seventh lens element

Yc 62: the vertical distance between the critical point of the image-side surface of the sixth lens element and the optical axis

Dr1 s: the distance from the object side surface of the first lens to the aperture on the optical axis

TL: the distance from the object side surface of the first lens element to the image plane on the optical axis

Y11: maximum optical effective radius of object-side surface of the first lens

BL: the distance from the image side surface of the seventh lens element to the image plane on the optical axis

ImgH: maximum image height of optical lens group for image pickup

Detailed Description

An optical lens assembly for photographing includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element, wherein a total number of the lens elements in the optical lens assembly for photographing is seven.

The first lens element with positive refractive power has an object-side surface being convex at a paraxial region thereof. Therefore, the main light converging capacity of the optical lens group for shooting is provided, the space of the optical lens group is effectively compressed, and the requirement of miniaturization is met.

The second lens element with negative refractive power has an object-side surface being convex at a paraxial region and an image-side surface being concave at a paraxial region. Therefore, the focusing positions of the light rays with different wave bands can be balanced to avoid the situation of image overlapping, and the first lens can be mutually blended to reduce the spherical aberration of the optical lens group for shooting.

The object-side surface of the fourth lens element can be concave at the paraxial region thereof, and the image-side surface thereof can be convex at the paraxial region thereof. Therefore, the optical path direction of the meridian (tangential) direction and the sagittal (sagittal) direction can be balanced, so that the astigmatism of the optical lens group for shooting can be favorably corrected. In addition, at least one of the object-side surface and the image-side surface of the fourth lens element includes at least one inflection point, which is advantageous for correcting the off-axis aberration.

The fifth lens element can have an object-side surface being concave at a paraxial region thereof and an image-side surface being convex at a paraxial region thereof. Therefore, the aberration of the optical lens group for shooting is favorably corrected.

The sixth lens element with negative refractive power has an image-side surface that is concave at a paraxial region. Therefore, the Petzval Surface of the optical lens assembly for shooting can be more flat, and the main point thereof can move towards the object side, so as to shorten the back focal length and control the total length thereof. Furthermore, at least one of the object-side surface and the image-side surface of the sixth lens element includes at least one inflection point. Thus, by correcting the peripheral aberration through the arrangement of the anti-curvatures while compressing the back focal length, a balance between imaging quality and volume can be achieved.

The seventh lens element with positive refractive power has an image-side surface being convex at a paraxial region. Therefore, a symmetrical structure can be formed with the first lens, the symmetry of the optical lens group for shooting can be increased, and the imaging quality is further improved.

The optical lens assembly for image pickup has a focal length f and a radius of curvature of the object-side surface of the first lens element R1, which satisfies the following conditions: 2.85< f/R1. Therefore, the optical lens assembly for shooting has the telescopic function, and can effectively control the total length so as to meet the requirement of miniaturization. Preferably, the following conditions are satisfied: 3.10< f/R1< 7.50.

The focal length of the sixth lens is f6, and the focal length of the seventh lens is f7, which satisfies the following conditions: -2.0< f6/f7< 1.5. Therefore, the sixth lens element has sufficient refractive power compared with the seventh lens element, so that the seventh lens element can accommodate the aberration generated by the sixth lens element. Preferably, the following conditions are satisfied: -0.90< f6/f7< 1.5. More preferably, the following conditions may be satisfied: -0.60< f6/f7< 0.60. Still further, the following conditions may be satisfied: -0.40< f6/f7< 0.40.

The radius of curvature of the object-side surface of the first lens element is R1, and the thickness of the first lens element along the optical axis is CT1, which satisfies the following conditions: R1/CT1< 2.5. Therefore, the first lens element has enough positive refractive power to provide a better telescopic effect for the optical lens assembly for shooting. Preferably, the following conditions are satisfied: R1/CT1< 2.2. More preferably, the following conditions may be satisfied: R1/CT1< 1.8.

The focal length of the optical lens group for image pickup is f, the maximum image height of the optical lens group for image pickup is ImgH, and the following conditions are satisfied: 2.20< f/ImgH < 5.50. Therefore, the method can help to control the shooting range and effectively control the view field angle so as to improve the resolution of the local range of the image and achieve better long-range shooting effect.

The optical lens assembly for image taking has a focal length f, and the seventh lens element has a radius of curvature of the image-side surface R14, which satisfies the following conditions: f/R14< 1.0. Therefore, the lens surface shape close to the imaging surface can be effectively controlled, the telescopic function is favorably achieved, and the symmetry of the whole optical lens group for shooting is improved.

The refractive power of the first lens element is P1, the refractive power of the second lens element is P2, the refractive power of the third lens element is P3, the refractive power of the fourth lens element is P4, the refractive power of the fifth lens element is P5, the refractive power of the sixth lens element is P6, and the refractive power of the seventh lens element is P7, which satisfy the following conditions: (| P3| + | P4| + | P5| + | P7|)/(| P1| + | P2| + | P6|) < 0.50. Therefore, the refractive power configuration of the optical lens assembly for shooting can be balanced, so as to simultaneously strengthen and balance the control capability of the object side end and the image side end of the optical lens assembly for shooting, improve the symmetry of the whole optical lens assembly for shooting and further reduce the sensitivity of the optical lens assembly for shooting.

The seventh lens has an abbe number V7, which satisfies the following condition: v7< 30. Therefore, the chromatic aberration of the optical lens group for integral shooting can be balanced, and better imaging quality is achieved.

The optical lens assembly for image capturing according to claim, further comprising an aperture stop disposed between the object and the third lens element or further disposed between the object and the first lens element.

The distance Dr1s from the object-side surface of the first lens element to the stop and the thickness CT2 from the optical axis of the second lens element satisfy the following conditions: 2.0< | Dr1s |/CT2< 5.0. Therefore, the aperture position can be effectively balanced, the size of the optical lens group for shooting is favorably controlled, the thickness of the lens can be controlled, the lens is easy to form, and the product manufacturability is improved.

The maximum optical effective radius of the object side surface of the first lens element is Y11, the maximum image height of the optical lens assembly for image capture is ImgH, and the following conditions are satisfied: 0.45< Y11/ImgH < 1.0. Therefore, the proportion of the light entering range and the imaging area can be balanced, and the optical lens group for shooting has enough light rays so as to improve the image brightness.

A perpendicular distance between a critical point of the image-side surface of the sixth lens element and the optical axis is Yc62, and an optical thickness of the sixth lens element is CT6, which satisfies the following conditions: 0.5< Yc62/CT6< 7.5. Therefore, the off-axis field aberration can be corrected, and the curvature of the imaging surface can be effectively controlled.

The distance between the image-side surface of the seventh lens element and the image plane is BL, the maximum image height of the optical lens assembly for image capture is ImgH, and the following conditions are satisfied: 0.10< BL/ImgH < 0.40. Therefore, the focal length of the optical lens group for shooting can be controlled, the size of the optical lens group is reduced, and the miniaturization effect is achieved.

The focal length of the image pickup optical lens group is f, and the focal length of the fourth lens element is f4, which satisfies the following conditions: l f/f4| < 0.35. Therefore, the fourth lens has aberration correction capability and avoids generating excessive aberration.

The distance between the fifth lens element and the sixth lens element on the optical axis is T56, and the sum of the distances between the two adjacent lens elements on the optical axis is Σ AT, which satisfies the following condition: 0.40< T56/(Σ AT-T56). Therefore, the fifth lens and the sixth lens have an optical path harmonizing function, and the telescopic function is favorably achieved.

At least one of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element with positive refractive power has an abbe number smaller than 25. Therefore, the distribution of the light ray dispersing capacity in the optical lens group for shooting can be effectively controlled, and the diversified shooting range is favorably achieved.

The distance TL from the object-side surface of the first lens element to the image plane on the optical axis and the focal length f of the optical lens assembly for image capturing satisfy the following conditions: TL/f is more than 0.70 and less than or equal to 1.10. Therefore, the total length of the optical lens group for shooting can be suppressed while pursuing high resolution of local images.

In the optical lens assembly for photographing provided by the present invention, the material of the lens can be plastic or glass. When the lens is made of plastic, the production cost can be effectively reduced. In addition, when the lens element is made of glass, the degree of freedom of the refractive power configuration of the optical lens assembly for photographing can be increased. In addition, the object-side surface and the image-side surface of the optical lens assembly for photographing can be Aspheric Surfaces (ASP), which can be easily made into shapes other than spherical surfaces to obtain more control variables for reducing the aberration and further reducing the number of the lenses, thereby effectively reducing the total track length of the optical lens assembly for photographing.

Moreover, in the optical lens assembly for photographing provided by the present invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface can be convex at a position close to the optical axis; if the lens surface is concave and the concave position is not defined, it means that the lens surface can be concave at the paraxial region. In the photographing optical lens assembly provided by the present invention, if the lens element has positive refractive power or negative refractive power, or the focal length of the lens element, the refractive power or the focal length of the lens element at the paraxial region can be referred to.

In addition, the optical lens assembly for shooting of the present invention can be provided with at least one diaphragm according to requirements to reduce stray light, which is helpful to improve image quality.

The image plane of the optical lens assembly for photographing of the present invention can be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing to the object side, depending on the corresponding electronic photosensitive element.

In the optical lens assembly for photographing according to the present invention, the stop may be a front stop or a middle stop, wherein the front stop means that the stop is disposed between the object and the first lens element, and the middle stop means that the stop is disposed between the first lens element and the image plane. If the diaphragm is a front diaphragm, the Exit Pupil (Exit Pupil) of the optical lens assembly for shooting and the imaging surface can generate a longer distance, so that the optical lens assembly for shooting and the imaging surface have a Telecentric (telecentricity) effect, and the image receiving efficiency of a CCD (charge coupled device) or a CMOS (complementary metal oxide semiconductor) of the electronic photosensitive element can be increased; if the diaphragm is arranged in the middle, the system is beneficial to expanding the angle of view of the system, and the optical lens group for shooting has the advantage of a wide-angle lens.

In the optical lens assembly for photographing of the present invention, the critical point is a tangent point on the lens surface, except for the intersection point with the optical axis, tangent to a tangent plane perpendicular to the optical axis.

The optical lens assembly for photographing of the invention can also be applied to electronic devices such as three-dimensional (3D) image capturing, digital cameras, mobile products, digital flat panels, smart televisions, network monitoring equipment, somatosensory game machines, automobile recorders, backing-up developing devices, wearable products and the like in many ways.

The invention provides an image capturing device, which comprises the optical lens assembly for shooting and an electronic photosensitive element, wherein the electronic photosensitive element is arranged on an imaging surface of the optical lens assembly for shooting. The first lens element with positive refractive power and the sixth lens element with negative curvature of the optical lens assembly for image capture are disposed to provide the main focusing power for the optical lens assembly for image capture, so as to effectively reduce the space thereof, achieve the miniaturization requirement, correct the peripheral aberration thereof, and balance the imaging quality and volume thereof by reducing the back focal length thereof. Preferably, the image capturing device may further include a Barrel (Barrel Member), a Holder (Holder Member), or a combination thereof.

The invention provides an electronic device comprising the image capturing device. Therefore, the imaging quality is improved. Preferably, the electronic device may further include a Control Unit (Control Unit), a Display Unit (Display), a Storage Unit (Storage Unit), a Random Access Memory (RAM), or a combination thereof.

The following provides a detailed description of the embodiments with reference to the accompanying drawings.

< first embodiment >

Referring to fig. 1 and fig. 2, wherein fig. 1 is a schematic diagram of an image capturing device according to a first embodiment of the invention, and fig. 2 is a graph of spherical aberration, astigmatism and distortion of the first embodiment in order from left to right. As shown in fig. 1, the image capturing device of the first embodiment includes an optical lens assembly (not labeled) for capturing images and an electronic photosensitive element 195. The image capturing optical lens assembly includes, in order from an object side to an image side, an aperture stop 100, a first lens element 110, a second lens element 120, a third lens element 130, a fourth lens element 140, a fifth lens element 150, a sixth lens element 160, a seventh lens element 170, an ir-cut filter 180 and an image plane 190, and an electronic sensor 195 is disposed on the image plane 190 of the image capturing optical lens assembly, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (110-.

The first lens element 110 with positive refractive power has an object-side surface 111 being convex in a paraxial region thereof and an image-side surface 112 being concave in a paraxial region thereof.

The second lens element 120 with negative refractive power has an object-side surface 121 being convex in a paraxial region thereof and an image-side surface 122 being concave in a paraxial region thereof.

The third lens element 130 with positive refractive power has an object-side surface 131 being convex in a paraxial region thereof and an image-side surface 132 being concave in a paraxial region thereof.

The fourth lens element 140 with positive refractive power has an object-side surface 141 being concave in a paraxial region thereof and an image-side surface 142 being convex in a paraxial region thereof. In addition, the fourth lens element image-side surface 142 includes at least one inflection point.

The fifth lens element 150 with negative refractive power has an object-side surface 151 being concave in a paraxial region thereof and an image-side surface 152 being convex in a paraxial region thereof.

The sixth lens element 160 with negative refractive power has an object-side surface 161 being concave in a paraxial region thereof and an image-side surface 162 being concave in a paraxial region thereof. In addition, the sixth lens element image-side surface 162 includes at least one inflection point.

The seventh lens element 170 with positive refractive power has an object-side surface 171 being concave in a paraxial region thereof and an image-side surface 172 being convex in a paraxial region thereof.

The ir-cut filter 180 is made of glass, and is disposed between the seventh lens element 170 and the image plane 190 without affecting the focal length of the optical lens assembly for capturing images.

The curve equation of the aspherical surface of each lens described above is as follows:

wherein:

x: the distance between the point on the aspheric surface, which is Y from the optical axis, and the relative distance between the point and the tangent plane of the intersection point tangent to the aspheric surface optical axis;

y: the perpendicular distance between a point on the aspheric curve and the optical axis;

r: a radius of curvature;

k: the cone coefficient; and

ai: the ith order aspheric coefficients.

In the image-taking optical lens group of the first embodiment, the focal length of the image-taking optical lens group is f, the aperture value (f-number) of the image-taking optical lens group is Fno, and half of the maximum field angle in the image-taking optical lens group is HFOV, which has the following values: f is 6.17 mm; fno 2.40; and HFOV 20.8 degrees.

In the optical lens group for image pickup of the first embodiment, the seventh lens 170 has an abbe number V7, which satisfies the following condition: v7 ═ 23.5.

In the optical lens assembly for image capturing of the first embodiment, the radius of curvature of the object-side surface 111 of the first lens element is R1, and the thickness of the first lens element 110 along the optical axis is CT1, which satisfies the following conditions: R1/CT1 is 1.51.

In the first embodiment of the optical lens assembly for photographing, an axial distance between the first lens element 110 and the second lens element 120 is T12, an axial distance between the second lens element 120 and the third lens element 130 is T23, an axial distance between the third lens element 130 and the fourth lens element 140 is T34, an axial distance between the fourth lens element 140 and the fifth lens element 150 is T45, an axial distance between the fifth lens element 150 and the sixth lens element 160 is T56, an axial distance between the sixth lens element 160 and the seventh lens element 170 is T67, a sum of the axial distances between two adjacent lens elements is Σ AT (i.e., Σ AT T12+ T23+ T34+ T45+ T56+ T67), which satisfies the following conditions: t56/(Σ AT-T56) is 0.68.

In the image capturing optical lens assembly of the first embodiment, the focal length of the image capturing optical lens assembly is f, the radius of curvature of the object-side surface 111 of the first lens element is R1, and the radius of curvature of the image-side surface 172 of the seventh lens element is R14, which satisfy the following conditions: f/R1 ═ 3.79; and f/R14 ═ 0.28.

In the optical lens group for image pickup of the first embodiment, the focal length of the sixth lens element 160 is f6, and the focal length of the seventh lens element 170 is f7, which satisfy the following conditions: f6/f7 is-0.07.

In the image pickup optical lens group of the first embodiment, the focal length of the image pickup optical lens group is f, and the focal length of the fourth lens element 140 is f4, which satisfies the following conditions: i f/f4|, 0.06.

In the image capturing optical lens assembly of the first embodiment, the refractive power of the first lens element 110 is P1 (i.e. the ratio f/f1 of the focal length f of the image capturing optical lens assembly to the focal length f1 of the first lens element 110), the refractive power of the second lens element 120 is P2 (i.e. the ratio f/f2 of the focal length f of the image capturing optical lens assembly to the focal length f2 of the second lens element 120), the refractive power of the third lens element 130 is P3 (i.e. the ratio f/f3 of the focal length f of the image capturing optical lens assembly to the focal length f3 of the third lens element 130), the refractive power of the fourth lens element 140 is P4 (i.e. the ratio f/f4 of the focal length f of the image capturing optical lens assembly to the focal length f4 of the fourth lens element 140), the refractive power of the fifth lens element 150 is P5 (i.e. the ratio f/f 59648 of the focal length f of the image capturing optical lens assembly to the focal length f5 of the fifth lens element 150), the refractive power of the sixth lens element 160 is the focal length P6/f 6, the refractive power of the seventh lens element 170 is P7 (i.e. the ratio f/f7 of the focal length f of the optical lens assembly for image capturing to the focal length f7 of the seventh lens element 170), which satisfies the following condition: (| P3| + | P4| + | P5| + | P7|)/(| P1| + | P2| + | P6|) -0.06.

Referring to FIG. 23, a diagram of the parameter Yc62 according to the first embodiment of FIG. 1 is shown. As can be seen from fig. 23, the vertical distance between the critical point of the image-side surface 162 of the sixth lens element and the optical axis is Yc62, and the axial thickness of the sixth lens element 160 is CT6, which satisfies the following conditions: yc62/CT6 equals 2.32.

Referring to FIG. 24, a diagram of the parameter Dr1s according to the first embodiment of FIG. 1 is shown. As can be seen from fig. 24, an axial distance Dr1s from the object-side surface 111 of the first lens element to the stop 100 and an axial thickness CT2 of the second lens element 120 satisfy the following conditions: i Dr1s i/CT 2-2.99.

In the first embodiment of the optical lens assembly for image capturing, an axial distance TL from the object-side surface 111 to the image plane 190 of the first lens element is, a focal length f of the optical lens assembly for image capturing satisfies the following conditions: TL/f is 1.00.

In the image pickup optical lens group of the first embodiment, the focal length of the image pickup optical lens group is f, and the maximum image height of the image pickup optical lens group is ImgH (i.e., half of the diagonal length of the effective sensing area of the electron sensor 195), which satisfies the following conditions: f/ImgH is 2.54.

Referring to FIG. 25, a diagram of the parameter Y11 according to the first embodiment of FIG. 1 is shown. As can be seen from fig. 25, the maximum effective radius of the first lens element object-side surface 111 is Y11, and the maximum image height of the image capturing optical lens assembly is ImgH, which satisfy the following conditions: Y11/ImgH is 0.53.

In the optical lens assembly for image capturing of the first embodiment, the distance from the image-side surface 172 of the seventh lens element to the image plane 190 on the optical axis is BL, and the maximum image height of the optical lens assembly for image capturing is ImgH, which satisfies the following conditions: BL/ImgH is 0.28.

The following list I and list II are referred to cooperatively.

In table one, the detailed structural data of the first embodiment of fig. 1 are shown, wherein the units of the radius of curvature, the thickness and the focal length are mm, and the surfaces 0-18 sequentially represent the surfaces from the object side to the image side. Table II shows aspheric data of the first embodiment, where k represents the cone coefficients in the aspheric curve equation, and A4-A16 represents the 4 th to 16 th order aspheric coefficients of each surface. In addition, the following tables of the embodiments correspond to the schematic diagrams and aberration graphs of the embodiments, and the definitions of the data in the tables are the same as those of the first and second tables of the first embodiment, which is not repeated herein.

In addition, in the first embodiment, in the first lens element 110, the second lens element 120, the third lens element 130, the fourth lens element 140, the fifth lens element 150, the sixth lens element 160 and the seventh lens element 170, at least one of the lens elements with positive refractive power has an abbe number smaller than 25, that is, the fourth lens element 140 and the seventh lens element 170.

< second embodiment >

Referring to fig. 3 and fig. 4, wherein fig. 3 is a schematic diagram of an image capturing device according to a second embodiment of the invention, and fig. 4 is a graph of spherical aberration, astigmatism and distortion of the second embodiment in order from left to right. As shown in fig. 3, the image capturing device of the second embodiment includes an optical lens assembly (not shown) for capturing images and an electronic photosensitive element 295. The image capturing optical lens assembly includes, in order from an object side to an image side, an aperture stop 200, a first lens element 210, a second lens element 220, a third lens element 230, a fourth lens element 240, a fifth lens element 250, a sixth lens element 260, a seventh lens element 270, an ir-cut filter 280 and an image plane 290, and an electron sensor 295 is disposed on the image plane 290 of the image capturing optical lens assembly, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (210 plus 270).

The first lens element 210 with positive refractive power has an object-side surface 211 being convex in a paraxial region thereof and an image-side surface 212 being concave in a paraxial region thereof.

The second lens element 220 with negative refractive power has an object-side surface 221 being convex in a paraxial region thereof and an image-side surface 222 being concave in a paraxial region thereof.

The third lens element 230 with negative refractive power has an object-side surface 231 being convex in a paraxial region thereof and an image-side surface 232 being concave in a paraxial region thereof.

The fourth lens element 240 with negative refractive power has an object-side surface 241 being concave in a paraxial region thereof and an image-side surface 242 being convex in a paraxial region thereof. In addition, the fourth lens element image-side surface 242 includes at least one inflection point.

The fifth lens element 250 with positive refractive power has an object-side surface 251 being concave in a paraxial region thereof and an image-side surface 252 being convex in a paraxial region thereof.

The sixth lens element 260 with negative refractive power has an object-side surface 261 being concave in a paraxial region thereof and an image-side surface 262 being concave in a paraxial region thereof. In addition, the sixth lens element has an image-side surface 262 with at least one inflection point.

The seventh lens element 270 with positive refractive power has an object-side surface 271 being concave in a paraxial region thereof and an image-side surface 272 being convex in a paraxial region thereof.

The ir-cut filter 280 is made of glass and disposed between the seventh lens element 270 and the image plane 290 without affecting the focal length of the optical lens assembly for capturing images.

The following third and fourth tables are referred to in combination.

In the second embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be calculated by matching table three and table four:

in addition, in the second embodiment, in the first lens element 210, the second lens element 220, the third lens element 230, the fourth lens element 240, the fifth lens element 250, the sixth lens element 260 and the seventh lens element 270, at least one of the lens elements with positive refractive power has an abbe number smaller than 25, that is, the seventh lens element 270.

< third embodiment >

Referring to fig. 5 and fig. 6, wherein fig. 5 is a schematic diagram of an image capturing apparatus according to a third embodiment of the present invention, and fig. 6 is a graph of spherical aberration, astigmatism and distortion of the third embodiment in order from left to right. As shown in fig. 5, the image capturing device of the third embodiment includes an optical lens assembly (not labeled) for image capturing and an electronic photosensitive element 395. The image capturing optical lens assembly includes, in order from an object side to an image side, an aperture stop 300, a first lens element 310, a second lens element 320, a third lens element 330, a fourth lens element 340, a fifth lens element 350, a sixth lens element 360, a seventh lens element 370, an ir-cut filter 380 and an image plane 390, and the electro-optic sensor 395 is disposed on the image plane 390 of the image capturing optical lens assembly, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (310-.

The first lens element 310 with positive refractive power has an object-side surface 311 being convex in a paraxial region thereof and an image-side surface 312 being convex in a paraxial region thereof.

The second lens element 320 with negative refractive power has an object-side surface 321 being convex in a paraxial region thereof and an image-side surface 322 being concave in a paraxial region thereof.

The third lens element 330 with negative refractive power has an object-side surface 331 being convex in a paraxial region thereof and an image-side surface 332 being concave in a paraxial region thereof.

The fourth lens element 340 with negative refractive power has an object-side surface 341 being concave in a paraxial region thereof and an image-side surface 342 being concave in a paraxial region thereof.

The fifth lens element 350 with positive refractive power has an object-side surface 351 being convex in a paraxial region thereof and an image-side surface 352 being convex in a paraxial region thereof.

The sixth lens element 360 with negative refractive power has an object-side surface 361 being concave in a paraxial region thereof and an image-side surface 362 being concave in a paraxial region thereof. In addition, the sixth lens element image-side surface 362 includes at least one inflection point.

The seventh lens element 370 with negative refractive power has an object-side surface 371 being convex in a paraxial region thereof and an image-side surface 372 being concave in a paraxial region thereof.

The ir-cut filter 380 is made of glass and disposed between the seventh lens element 370 and the image plane 390 without affecting the focal length of the optical lens assembly for capturing images.

See also table five and table six below.

In the third embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be derived by matching table five and table six:

< fourth embodiment >

Referring to fig. 7 and 8, wherein fig. 7 is a schematic diagram of an image capturing apparatus according to a fourth embodiment of the invention, and fig. 8 is a graph of spherical aberration, astigmatism and distortion of the fourth embodiment in order from left to right. As shown in fig. 7, the image capturing device of the fourth embodiment includes an optical lens assembly (not labeled) for image capturing and an electro-optic sensor 495. The image capturing optical lens assembly includes, in order from an object side to an image side, an aperture stop 400, a first lens element 410, a second lens element 420, a third lens element 430, a fourth lens element 440, a fifth lens element 450, a sixth lens element 460, a seventh lens element 470, an ir-cut filter 480 and an image plane 490, and the electro-optic sensor 495 is disposed on the image plane 490, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (410-.

The first lens element 410 with positive refractive power has an object-side surface 411 being convex in a paraxial region thereof and an image-side surface 412 being concave in a paraxial region thereof.

The second lens element 420 with negative refractive power has an object-side surface 421 being convex in a paraxial region thereof and an image-side surface 422 being concave in a paraxial region thereof.

The third lens element 430 with positive refractive power has an object-side surface 431 being convex in a paraxial region thereof and an image-side surface 432 being concave in a paraxial region thereof.

The fourth lens element 440 with positive refractive power has an object-side surface 441 being concave in a paraxial region thereof and an image-side surface 442 being convex in a paraxial region thereof. In addition, the fourth lens object-side surface 441 includes at least one inflection point.

The fifth lens element 450 with negative refractive power has an object-side surface 451 being concave in a paraxial region thereof and an image-side surface 452 being convex in a paraxial region thereof.

The sixth lens element 460 with negative refractive power has an object-side surface 461 being concave in a paraxial region thereof and an image-side surface 462 being concave in a paraxial region thereof. In addition, the sixth lens element image-side surface 462 includes at least one inflection point.

The seventh lens element 470 with positive refractive power has an object-side surface 471 being concave in a paraxial region thereof and an image-side surface 472 being convex in a paraxial region thereof.

The ir-cut filter 480 is made of glass, and is disposed between the seventh lens element 470 and the image plane 490 without affecting the focal length of the optical lens assembly for capturing images.

See also table seven and table eight below.

In the fourth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be derived by matching table seven and table eight:

in addition, in the fourth embodiment, in the first lens element 410, the second lens element 420, the third lens element 430, the fourth lens element 440, the fifth lens element 450, the sixth lens element 460 and the seventh lens element 470, at least one of the lens elements with positive refractive power has an abbe number smaller than 25, that is, the seventh lens element 470.

< fifth embodiment >

Referring to fig. 9 and 10, fig. 9 is a schematic diagram illustrating an image capturing device according to a fifth embodiment of the invention, and fig. 10 is a graph illustrating spherical aberration, astigmatism and distortion of the fifth embodiment in order from left to right. As shown in fig. 9, the image capturing device of the fifth embodiment includes an optical lens assembly (not labeled) for capturing images and an electronic photosensitive element 595. The image capturing optical lens assembly includes, in order from an object side to an image side, an aperture stop 500, a first lens element 510, a second lens element 520, a third lens element 530, a fourth lens element 540, a fifth lens element 550, a sixth lens element 560, a seventh lens element 570, an ir-cut filter 580 and an image plane 590, and the electro-optic element 595 is disposed on the image plane 590 of the image capturing optical lens assembly, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (510-.

The first lens element 510 with positive refractive power has an object-side surface 511 being convex in a paraxial region thereof and an image-side surface 512 being convex in a paraxial region thereof.

The second lens element 520 with negative refractive power has an object-side surface 521 being concave in a paraxial region thereof and an image-side surface 522 being concave in a paraxial region thereof.

The third lens element 530 with negative refractive power has an object-side surface 531 being convex in a paraxial region thereof and an image-side surface 532 being concave in a paraxial region thereof.

The fourth lens element 540 with positive refractive power has an object-side surface 541 being convex in a paraxial region thereof and an image-side surface 542 being convex in a paraxial region thereof. In addition, the object-side surface 541 and the image-side surface 542 of the fourth lens element include at least one inflection point.

The fifth lens element 550 with negative refractive power has an object-side surface 551 which is convex in a paraxial region thereof and an image-side surface 552 which is concave in a paraxial region thereof.

The sixth lens element 560 with negative refractive power has an object-side surface 561 being concave in a paraxial region thereof and an image-side surface 562 being concave in a paraxial region thereof. In addition, the sixth lens element image-side surface 562 includes at least one inflection point.

The seventh lens element 570 with positive refractive power has an object-side surface 571 being concave in a paraxial region thereof and an image-side surface 572 being convex in a paraxial region thereof.

The ir-cut filter 580 is made of glass, and is disposed between the seventh lens element 570 and the image plane 590 without affecting the focal length of the optical lens assembly for capturing images.

Reference is again made to table nine and table ten below.

In the fifth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be derived from tables nine and ten:

in addition, in the fifth embodiment, in the first lens element 510, the second lens element 520, the third lens element 530, the fourth lens element 540, the fifth lens element 550, the sixth lens element 560 and the seventh lens element 570, at least one of the lens elements with positive refractive power has an abbe number smaller than 25, that is, the fourth lens element 540 and the seventh lens element 570.

< sixth embodiment >

Referring to fig. 11 and 12, wherein fig. 11 is a schematic diagram illustrating an image capturing device according to a sixth embodiment of the invention, and fig. 12 is a graph illustrating spherical aberration, astigmatism and distortion in the sixth embodiment from left to right. As shown in fig. 11, the image capturing device of the sixth embodiment includes an optical lens assembly (not shown) for capturing images and an electronic photosensitive element 695. The image capturing optical lens assembly includes, in order from an object side to an image side, an aperture stop 600, a first lens element 610, a second lens element 620, a third lens element 630, a fourth lens element 640, a fifth lens element 650, a sixth lens element 660, a seventh lens element 670, an ir-cut filter 680 and an image plane 690, and an electro-optic sensor 695 is disposed on the image plane 690 of the image capturing optical lens assembly, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (610-.

The first lens element 610 with positive refractive power has an object-side surface 611 being convex in a paraxial region thereof and an image-side surface 612 being convex in a paraxial region thereof.

The second lens element 620 with negative refractive power has an object-side surface 621 being concave in a paraxial region thereof and an image-side surface 622 being concave in a paraxial region thereof.

The third lens element 630 with negative refractive power has an object-side surface 631 being convex in a paraxial region thereof and an image-side surface 632 being concave in a paraxial region thereof.

The fourth lens element 640 with positive refractive power has an object-side surface 641 being convex in a paraxial region thereof and an image-side surface 642 being convex in a paraxial region thereof. In addition, the object-side surface 641 and the image-side surface 642 of the fourth lens element include at least one inflection point.

The fifth lens element 650 with negative refractive power has an object-side surface 651 being concave in a paraxial region thereof and an image-side surface 652 being convex in a paraxial region thereof.

The sixth lens element 660 with negative refractive power has an object-side surface 661 being concave in a paraxial region thereof and an image-side surface 662 being concave in a paraxial region thereof. In addition, the sixth lens image-side surface 662 includes at least one inflection point.

The seventh lens element 670 with positive refractive power has an object-side surface 671 being concave in a paraxial region thereof and an image-side surface 672 being convex in the paraxial region thereof.

The ir-cut filter 680 is made of glass, and is disposed between the seventh lens element 670 and the image plane 690 without affecting the focal length of the photographing optical lens assembly.

Reference is again made to the following table eleven and table twelve.

In the sixth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be derived from table eleven and table twelve:

in addition, in the sixth embodiment, an abbe number of at least one of the first lens element 610, the second lens element 620, the third lens element 630, the fourth lens element 640, the fifth lens element 650, the sixth lens element 660 and the seventh lens element 670 with positive refractive power is smaller than 25, that is, the fourth lens element 640 and the seventh lens element 670.

< seventh embodiment >

Referring to fig. 13 and 14, wherein fig. 13 is a schematic diagram of an image capturing apparatus according to a seventh embodiment of the invention, and fig. 14 is a graph of spherical aberration, astigmatism and distortion of the seventh embodiment sequentially from left to right. As shown in fig. 13, the image capturing device of the seventh embodiment includes an optical lens assembly (not labeled) for capturing images and an electronic photosensitive element 795. The image capturing optical lens assembly includes, in order from an object side to an image side, an aperture stop 700, a first lens element 710, a second lens element 720, a third lens element 730, a fourth lens element 740, a fifth lens element 750, a sixth lens element 760, a seventh lens element 770, an ir-cut filter 780 and an image plane 790, and the electro-optic sensor 795 is disposed on the image plane 790 of the image capturing optical lens assembly, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (710-770).

The first lens element 710 with positive refractive power has an object-side surface 711 being convex in a paraxial region thereof and an image-side surface 712 being convex in a paraxial region thereof.

The second lens element 720 with negative refractive power has an object-side surface 721 being convex in a paraxial region thereof and an image-side surface 722 being concave in a paraxial region thereof.

The third lens element 730 with negative refractive power has an object-side surface 731 being convex in a paraxial region thereof and an image-side surface 732 being concave in a paraxial region thereof.

The fourth lens element 740 with negative refractive power has an object-side surface 741 being convex in a paraxial region thereof and an image-side surface 742 being concave in a paraxial region thereof. In addition, the fourth lens object side surface 741 includes at least one inflection point.

The fifth lens element 750 with positive refractive power has an object-side surface 751 being convex in a paraxial region thereof and an image-side surface 752 being convex in a paraxial region thereof.

The sixth lens element 760 with negative refractive power has an object-side surface 761 being convex in a paraxial region thereof and an image-side surface 762 being concave in a paraxial region thereof. In addition, the object-side surface 761 and the image-side surface 762 of the sixth lens element each include at least one inflection point.

The seventh lens element 770 with positive refractive power has an object-side surface 771 being convex in a paraxial region thereof and an image-side surface 772 being concave in a paraxial region thereof.

The ir-cut filter 780 is made of glass, and is disposed between the seventh lens element 770 and the image plane 790 without affecting the focal length of the photographing optical lens assembly.

Reference is again made to the following thirteen and fourteen tables.

In the seventh embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be derived from table thirteen and table fourteen:

in addition, in the seventh embodiment, in the first lens element 710, the second lens element 720, the third lens element 730, the fourth lens element 740, the fifth lens element 750, the sixth lens element 760 and the seventh lens element 770, at least one of the lens elements with positive refractive power has an abbe number smaller than 25, that is, the seventh lens element 770.

< eighth embodiment >

Referring to fig. 15 and 16, wherein fig. 15 is a schematic diagram of an image capturing apparatus according to an eighth embodiment of the present invention, and fig. 16 is a graph illustrating spherical aberration, astigmatism and distortion of the eighth embodiment in order from left to right. As shown in fig. 15, the image capturing device of the eighth embodiment includes an optical lens assembly (not labeled) for capturing images and an electronic photosensitive element 895. The image capturing optical lens assembly includes, in order from an object side to an image side, an aperture stop 800, a first lens element 810, a second lens element 820, a third lens element 830, a fourth lens element 840, a fifth lens element 850, a sixth lens element 860, a seventh lens element 870, an ir-cut filter 880 and an image plane 890, and the electronic sensor 895 is disposed on the image plane 890 of the image capturing optical lens assembly, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (810-870).

The first lens element 810 with positive refractive power has an object-side surface 811 being convex in a paraxial region thereof and an image-side surface 812 being convex in a paraxial region thereof.

The second lens element 820 with negative refractive power has an object-side surface 821 being convex in a paraxial region thereof and an image-side surface 822 being concave in a paraxial region thereof.

The third lens element 830 with negative refractive power has an object-side surface 831 being convex in a paraxial region thereof and an image-side surface 832 being concave in a paraxial region thereof.

The fourth lens element 840 with negative refractive power has an object-side surface 841 being convex in a paraxial region thereof and an image-side surface 842 being concave in a paraxial region thereof. In addition, the object-side surface 841 and the image-side surface 842 of the fourth lens element include at least one inflection point.

The fifth lens element 850 with positive refractive power has an object-side surface 851 being convex in a paraxial region thereof and an image-side surface 852 being convex in a paraxial region thereof.

The sixth lens element 860 with negative refractive power has an object-side surface 861 being convex in a paraxial region thereof and an image-side surface 862 being concave in the paraxial region thereof. In addition, the object-side surface 861 and the image-side surface 862 of the sixth lens element each include at least one inflection point.

The seventh lens element 870 with positive refractive power has an object-side surface 871 being convex in a paraxial region thereof and an image-side surface 872 being concave in a paraxial region thereof.

The ir-cut filter 880 is made of glass, and is disposed between the seventh lens element 870 and the image plane 890 without affecting the focal length of the optical lens assembly for capturing images.

See also table fifteen below and table sixteen.

In the eighth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be derived from the table fifteen and table sixteen:

in addition, in the eighth embodiment, an abbe number of at least one of the first lens element 810, the second lens element 820, the third lens element 830, the fourth lens element 840, the fifth lens element 850, the sixth lens element 860 and the seventh lens element 870 with positive refractive power is smaller than 25, that is, the seventh lens element 870.

< ninth embodiment >

Referring to fig. 17 and fig. 18, wherein fig. 17 is a schematic diagram of an image capturing apparatus according to a ninth embodiment of the invention, and fig. 18 is a graph of spherical aberration, astigmatism and distortion of the ninth embodiment in order from left to right. As shown in fig. 17, the image capturing device of the ninth embodiment includes an optical lens assembly (not shown) for capturing images and an electronic photosensitive element 995. The image capturing optical lens assembly includes, in order from an object side to an image side, an aperture stop 900, a first lens element 910, a second lens element 920, a third lens element 930, a fourth lens element 940, a fifth lens element 950, a sixth lens element 960, a seventh lens element 970, an ir-cut filter 980 and an image plane 990, and the electro-optic sensor 995 is disposed on the image plane 990 of the image capturing optical lens assembly, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (910-.

The first lens element 910 with positive refractive power has an object-side surface 911 being convex in a paraxial region thereof and an image-side surface 912 being concave in a paraxial region thereof.

The second lens element 920 with negative refractive power has an object-side surface 921 being convex in a paraxial region thereof and an image-side surface 922 being concave in a paraxial region thereof.

The third lens element 930 with negative refractive power has an object-side surface 931 being convex in a paraxial region thereof and an image-side surface 932 being concave in the paraxial region thereof.

The fourth lens element 940 with positive refractive power has an object-side surface 941 being convex in a paraxial region thereof and an image-side surface 942 being convex in a paraxial region thereof. In addition, the object-side surface 941 and the image-side surface 942 of the fourth lens element each include at least one inflection point.

The fifth lens element 950 with positive refractive power has an object-side surface 951 being convex in a paraxial region thereof and an image-side surface 952 being convex in a paraxial region thereof.

The sixth lens element 960 with negative refractive power has an object-side surface 961 being convex in a paraxial region thereof and an image-side surface 962 being concave in a paraxial region thereof. In addition, the object-side surface 961 and the image-side surface 962 of the sixth lens element each include at least one inflection point.

The seventh lens element 970 with positive refractive power has an object-side surface 971 being convex in a paraxial region thereof and an image-side surface 972 being concave in a paraxial region thereof.

The ir-cut filter 980 is made of glass, and is disposed between the seventh lens element 970 and the image plane 990 without affecting the focal length of the optical lens assembly for capturing images.

Further, reference is made to the seventeenth and eighteen tables below.

In the ninth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be derived from the seventeenth and eighteen tables:

in addition, in the ninth embodiment, at least one of the first lens element 910, the second lens element 920, the third lens element 930, the fourth lens element 940, the fifth lens element 950, the sixth lens element 960 and the seventh lens element 970, which has a positive refractive power, has an abbe number smaller than 25, that is, the fourth lens element 940.

< tenth embodiment >

Referring to fig. 19 and 20, fig. 19 is a schematic diagram illustrating an image capturing device according to a tenth embodiment of the invention, and fig. 20 is a graph illustrating spherical aberration, astigmatism and distortion of the tenth embodiment in order from left to right. As shown in fig. 19, the image capturing device of the tenth embodiment includes an optical lens assembly (not labeled) for capturing images and an electronic photosensitive element 1095. The optical lens assembly for image capturing includes, in order from an object side to an image side, a first lens element 1010, an aperture stop 1000, a second lens element 1020, a third lens element 1030, a fourth lens element 1040, a fifth lens element 1050, a sixth lens element 1060, a seventh lens element 1070, an ir-cut filter 1080 and an image plane 1090, and an electro-optic element 1095 is disposed on the image plane 1090 of the optical lens assembly for image capturing, wherein the total number of the lens elements in the optical lens assembly for image capturing is seven (1010-.

The first lens element 1010 with positive refractive power has an object-side surface 1011 being convex at a paraxial region thereof and an image-side surface 1012 being concave at a paraxial region thereof.

The second lens element 1020 with negative refractive power has an object-side surface 1021 being convex in a paraxial region thereof and an image-side surface 1022 being concave in a paraxial region thereof.

The third lens element 1030 with positive refractive power has an object-side surface 1031 being convex in a paraxial region thereof and an image-side surface 1032 being concave in a paraxial region thereof.

The fourth lens element 1040 with negative refractive power has an object-side surface 1041 being concave in a paraxial region thereof and an image-side surface 1042 being convex in a paraxial region thereof. In addition, the object-side surface 1041 and the image-side surface 1042 of the fourth lens element each include at least one inflection point.

The fifth lens element 1050 with negative refractive power has an object-side surface 1051 being concave in a paraxial region thereof and an image-side surface 1052 being convex in a paraxial region thereof.

The sixth lens element 1060 with negative refractive power has an object-side surface 1061 being convex in a paraxial region thereof and an image-side surface 1062 being concave in a paraxial region thereof. In addition, the object-side surface 1061 and the image-side surface 1062 of the sixth lens element each include at least one inflection point.

The seventh lens element 1070 with positive refractive power has an object-side surface 1071 being convex at a paraxial region thereof and an image-side surface 1072 being convex at a paraxial region thereof.

The ir-cut filter 1080 is made of glass, and is disposed between the seventh lens element 1070 and the image plane 1090 without affecting the focal length of the optical lens assembly for capturing images.

Further reference is made to the following nineteen and twenty tables.

In the tenth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be derived from the nineteen and twenty tables:

in addition, in the tenth embodiment, in the first lens element 1010, the second lens element 1020, the third lens element 1030, the fourth lens element 1040, the fifth lens element 1050, the sixth lens element 1060 and the seventh lens element 1070, at least one of the lens elements having positive refractive power has an abbe number smaller than 25, that is, the seventh lens element 1070.

< eleventh embodiment >

Referring to fig. 21 and fig. 22, fig. 21 is a schematic diagram of an image capturing apparatus according to an eleventh embodiment of the invention, and fig. 22 is a graph of spherical aberration, astigmatism and distortion of the eleventh embodiment sequentially from left to right. As shown in fig. 21, the image capturing device of the eleventh embodiment includes an optical lens assembly (not labeled) for capturing images and an electronic photosensitive element 1195. The image capturing optical lens assembly includes, in order from an object side to an image side, a first lens element 1110, an aperture stop 1100, a second lens element 1120, a third lens element 1130, a fourth lens element 1140, a fifth lens element 1150, a sixth lens element 1160, a seventh lens element 1170, an ir-cut filter 1180 and an image plane 1190, and an electronic sensing element 1195 is disposed on the image plane 1190 of the image capturing optical lens assembly, wherein the total number of the lens elements in the image capturing optical lens assembly is seven (1110-.

The first lens element 1110 with positive refractive power has an object-side surface 1111 being convex in a paraxial region thereof and an image-side surface 1112 being concave in a paraxial region thereof.

The second lens element 1120 with negative refractive power has an object-side surface 1121 being convex in a paraxial region thereof and an image-side surface 1122 being concave in a paraxial region thereof.

The third lens element 1130 with positive refractive power has an object-side surface 1131 being convex at a paraxial region thereof and an image-side surface 1132 being concave at a paraxial region thereof.

The fourth lens element 1140 with negative refractive power has an object-side surface 1141 being concave at a paraxial region thereof and an image-side surface 1142 being convex at a paraxial region thereof. In addition, the image-side surface 1142 of the fourth lens element includes at least one inflection point.

The fifth lens element 1150 with positive refractive power has an object-side surface 1151 being concave at a paraxial region thereof and an image-side surface 1152 being convex at a paraxial region thereof.

The sixth lens element 1160 with negative refractive power has an object-side surface 1161 being convex at a paraxial region thereof and an image-side surface 1162 being concave at a paraxial region thereof. In addition, the object-side surface 1161 and the image-side surface 1162 of the sixth lens element each include at least one inflection point.

The seventh lens element 1170 with negative refractive power has an object-side surface 1171 being concave in a paraxial region thereof and an image-side surface 1172 being concave in a paraxial region thereof.

The ir-cut filter 1180 is made of glass, and is disposed between the seventh lens element 1170 and the image plane 1190 without affecting the focal length of the photographing optical lens assembly.

Reference is again made to the following table twenty-one and twenty-two.

In the eleventh embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the following parameters are defined in the same way as in the first embodiment and will not be described herein.

The following data can be derived by matching the twenty-one and twenty-two tables:

in addition, in the eleventh embodiment, in the first lens element 1110, the second lens element 1120, the third lens element 1130, the fourth lens element 1140, the fifth lens element 1150, the sixth lens element 1160, and the seventh lens element 1170, at least one of the lens elements with positive refractive power has an abbe number smaller than 25, that is, the fifth lens element 1150.

< twelfth embodiment >

Fig. 26 is a schematic view illustrating an electronic device 10 according to a twelfth embodiment of the invention. The electronic device 10 of the twelfth embodiment is a smart phone, and the electronic device 10 includes an image capturing device 11, where the image capturing device 11 includes an optical lens assembly for capturing images (not shown) and an electronic photosensitive element (not shown) according to the present invention, where the electronic photosensitive element is disposed on an image plane of the optical lens assembly for capturing images.

< thirteenth embodiment >

Fig. 27 is a schematic view illustrating an electronic device 20 according to a thirteenth embodiment of the invention. The electronic device 20 of the thirteenth embodiment is a tablet computer, the electronic device 20 includes an image capturing device 21, and the image capturing device 21 includes an optical lens assembly for capturing images (not shown) and an electronic photosensitive element (not shown) according to the present invention, wherein the electronic photosensitive element is disposed on an image plane of the optical lens assembly for capturing images.

< fourteenth embodiment >

Fig. 28 is a schematic view illustrating an electronic device 30 according to a fourteenth embodiment of the invention. The electronic device 30 of the fourteenth embodiment is a Head-mounted display (HMD), and the electronic device 30 includes an image capturing device 31, where the image capturing device 31 includes an optical lens assembly for capturing images (not shown) and an electronic photosensitive element (not shown) according to the present invention, where the electronic photosensitive element is disposed on an image plane of the optical lens assembly for capturing images.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims (19)

1. An optical lens assembly for image taking, in order from an object side to an image side comprising:

a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element;

the first lens element with positive refractive power has an object-side surface being convex at a paraxial region thereof, the sixth lens element with negative refractive power has an image-side surface being concave at a paraxial region thereof, at least one of the object-side surface and the image-side surface of the sixth lens element is aspheric, at least one of the object-side surface and the image-side surface of the sixth lens element has at least one inflection point, and at least one of the object-side surface and the image-side surface of the seventh lens element is aspheric;

wherein the total number of the lenses in the optical lens assembly for capturing images is seven, and no relative movement exists between the lenses, an abbe number of at least one of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element having positive refractive power is less than 25, a focal length of the optical lens assembly for capturing images is f, a curvature radius of an object-side surface of the first lens element is R1, and a maximum image height of the optical lens assembly for capturing images is ImgH, which satisfies the following conditions:

2.85< f/R1; and

2.20<f/ImgH<5.50。

2. the imaging optical lens assembly as claimed in claim 1, wherein an air space is formed between any two adjacent lenses of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element and the seventh lens element.

3. The optical lens assembly as claimed in claim 2, wherein an axial distance between the object-side surface of the first lens element and an image plane is TL, and a focal length of the optical lens assembly is f, which satisfies the following condition:

0.70<TL/f≤1.10。

4. the optical lens assembly as claimed in claim 3, wherein the second lens element has an object-side surface being convex and a image-side surface being concave.

5. The image capturing optical lens assembly according to claim 3, wherein the focal length of the image capturing optical lens assembly is f, and the radius of curvature of the object-side surface of the first lens element is R1, satisfying the following condition:

3.10<f/R1<7.50。

6. the imaging optical lens assembly as claimed in claim 3, wherein the maximum effective radius of the object-side surface of the first lens element is Y11, and the maximum image height of the imaging optical lens assembly is ImgH, which satisfies the following condition:

0.45<Y11/ImgH<1.0。

7. the imaging optical lens assembly according to claim 1, wherein the sixth lens element has a focal length f6, and the seventh lens element has a focal length f7, which satisfies the following conditions:

-2.0<f6/f7<1.5。

8. the image capturing optical lens assembly of claim 1, wherein the refractive power of the first lens element is P1, the refractive power of the second lens element is P2, the refractive power of the third lens element is P3, the refractive power of the fourth lens element is P4, the refractive power of the fifth lens element is P5, the refractive power of the sixth lens element is P6, and the refractive power of the seventh lens element is P7, wherein the following conditions are satisfied:

(|P3|+|P4|+|P5|+|P7|)/(|P1|+|P2|+|P6|)<0.50。

9. the imaging optical lens assembly according to claim 1, wherein the seventh lens element has an abbe number V7 satisfying the following condition:

V7<30。

10. the imaging optical lens assembly according to claim 1, wherein a perpendicular distance between a critical point of the image-side surface of the sixth lens element and the optical axis is Yc62, and an axial thickness of the sixth lens element is CT6, which satisfies the following conditions:

0.5<Yc62/CT6<7.5。

11. the optical lens assembly for image taking as claimed in claim 1, wherein a distance on an optical axis from the image-side surface of the seventh lens element to an image plane is BL, and a maximum image height of the optical lens assembly for image taking is ImgH, which satisfies the following condition:

0.10<BL/ImgH<0.40。

12. the image capturing optical lens assembly of claim 1, wherein the radius of curvature of the object-side surface of the first lens element is R1, and the thickness of the first lens element along the optical axis is CT1, satisfying the following conditions:

R1/CT1<2.5。

13. the optical lens assembly as claimed in claim 12, wherein the radius of curvature of the object-side surface of the first lens element is R1, and the thickness of the first lens element along the optical axis is CT1, which satisfies the following conditions:

R1/CT1<1.8。

14. the imaging optical lens assembly as claimed in claim 1, wherein the seventh lens element has positive refractive power.

15. The imaging optical lens assembly of claim 1, wherein the fifth lens element has an object-side surface that is concave at a paraxial region and an image-side surface that is convex at a paraxial region.

16. The imaging optical lens assembly according to claim 1, wherein object-side and image-side surfaces of the second, third, fourth, fifth and sixth lenses are aspheric, and at least one surface of the fourth lens comprises at least one inflection point, wherein a focal length of the imaging optical lens assembly is f, and a focal length of the fourth lens is f4, satisfying the following conditions:

|f/f4|<0.35。

17. the image capturing optical lens assembly as claimed in claim 1, wherein the distance between the fifth lens element and the sixth lens element is T56, and the sum of the distances between two adjacent lens elements is Σ AT, which satisfies the following condition:

0.40<T56/(ΣAT-T56)。

18. an image capturing device, comprising:

an optical lens group for image pickup according to claim 1; and

an electronic photosensitive element, it is set on an imaging surface of the optical lens group for shooting.

19. An electronic device, comprising:

the image capturing apparatus of claim 18.

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