CN109683290B

CN109683290B - Imaging optical lens assembly, image capturing device and electronic device

Info

Publication number: CN109683290B
Application number: CN201910121050.8A
Authority: CN
Inventors: 黄歆璇
Original assignee: Largan Precision Co Ltd
Current assignee: Largan Precision Co Ltd
Priority date: 2016-01-22
Filing date: 2016-01-22
Publication date: 2020-12-08
Anticipated expiration: 2036-01-22
Also published as: CN109656001B; CN106997084B; CN109656001A; CN106997084A; CN109683290A

Abstract

The invention discloses an optical lens assembly for imaging, an image capturing device and an electronic device. The object side surface of the first lens element is concave at a paraxial region. The second lens element has positive refractive power. The third lens element has a convex object-side surface and a concave image-side surface. The image-side surface of the sixth lens element is concave at a paraxial region. The image-side surface of the sixth lens element has at least one inflection point. The total number of lenses of the imaging optical lens group is six and the dispersion coefficient of at least two lenses is less than 30. The invention also discloses an image capturing device with the imaging optical lens group and an electronic device with the image capturing device.

Description

Imaging optical lens assembly, image capturing device and electronic device

The application is a divisional application, and the application date of the original application is as follows: 2016, 1 month, 22 days; the application numbers are: 201610044563. X; the invention has the name: an optical lens assembly for imaging, an image capturing device and an electronic device.

Technical Field

The present invention relates to an optical lens assembly for imaging, an image capturing device and an electronic device, and more particularly, to an optical lens assembly for imaging and an image capturing device suitable for an electronic device.

Background

In recent years, with the rapid development of the miniaturized camera lens, the demand of the miniature image capturing module is increasing, and with the advance of the semiconductor process technology, the pixel size of the photosensitive element is reduced, and in addition, the current electronic products are developed with a good function, a light, thin, short and small appearance, so that the miniaturized camera lens with good imaging quality is the mainstream in the market at present.

Due to the prevalence of electronic devices such as high-end smart phones, wearable devices, tablet computers, driving recorders, aerial cameras, image recognition systems, etc. that require obtaining a large range of images in recent years, the demands of the photographing lens for a wide viewing angle and high resolution are becoming more and more stringent, so that the imaging quality of the conventional optical system cannot meet the requirements of the high-end electronic devices for the imaging quality. Therefore, it is one of the problems to be solved in the industry to provide a miniaturized optical system with high imaging quality, which can be applied to high-level electronic devices.

Disclosure of Invention

The present invention is directed to an optical lens assembly for imaging, an image capturing device and an electronic device, wherein a second lens element of the optical lens assembly for imaging has positive refractive power, which provides sufficient light converging capability at an object side, thereby helping to shorten a total track length and maintain miniaturization thereof. The image-side surface of the sixth lens element is concave at a paraxial region thereof, such that a principal point thereof can be shifted toward the object side, thereby reducing a back focus and further reducing an overall length thereof. The image side surface of the sixth lens element has at least one point of inflection for further correcting aberrations at off-axis. When the specific condition is satisfied, the image capturing device can have enough view angle to capture the image in a large range, thereby being beneficial to controlling the total track length and achieving the purpose of miniaturization. In addition, the situation that the fourth lens is difficult to form due to overlarge shape change of the fourth lens can be avoided, and the manufacturing yield is further influenced. In summary, the present invention can satisfy the requirements of wide viewing angle, miniaturization, easy molding, high yield, etc.

The present invention provides an optical imaging lens assembly, comprising, 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 and a sixth lens element. The object side surface of the first lens element is concave at a paraxial region. The second lens element has positive refractive power. The third lens element has a convex object-side surface and a concave image-side surface. The image-side surface of the sixth lens element is concave at a paraxial region. The image-side surface of the sixth lens element has at least one inflection point. The total number of lenses of the imaging optical lens group is six. The abbe number of at least two lenses of the imaging optical lens assembly is less than 30, the focal length of the imaging optical lens assembly is f, the distance between the object-side surface of the first lens element and the image plane on the optical axis is TL, the radius of curvature of the object-side surface of the fourth lens element is R7, and the radius of curvature of the image-side surface of the fourth lens element is R8, which satisfies the following conditions:

TL/f is more than or equal to 1.53 and less than 2.85; and

0<(R7+R8)/(R7-R8)≤1.13。

the present invention further provides an image capturing device, which includes the aforementioned optical lens assembly for imaging and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the optical lens assembly for imaging.

The invention further provides an electronic device comprising the image capturing device.

When the TL/f satisfies the above condition, it can have enough view angle to capture the image in a large range, which is helpful to control the total length of the lens set to achieve the purpose of miniaturization.

When the (R7+ R8)/(R7-R8) satisfies the above conditions, it is possible to prevent the fourth lens from being formed with difficulty due to an excessively large change in shape, thereby affecting the manufacturing yield. The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a schematic view of an image capturing apparatus according to a first embodiment of the present 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 of an image capturing apparatus 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 of 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 from left to right;

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

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

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

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

FIG. 15 is a schematic view of 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 of an image capturing apparatus according to a ninth embodiment of the invention;

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

FIG. 19 is a schematic view of 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 of an image capturing apparatus according to an eleventh embodiment of the invention;

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

FIG. 23 is a schematic view of an image capturing apparatus according to a twelfth embodiment of the invention;

FIG. 24 is a graph showing the spherical aberration, astigmatism and distortion of the twelfth embodiment in order from left to right;

FIG. 25 is a diagram illustrating parameters Y11, Y62, Yc62 according to the first embodiment of the present invention;

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

FIG. 27 is a schematic view of another electronic device according to the present invention;

FIG. 28 is a schematic view of another electronic device according to the present invention;

FIG. 29 is a schematic diagram of another electronic device according to the present invention.

Wherein the reference numerals

Image capturing device: 10

Aperture ratio of 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200

First lens element

110, 210, 310, 410, 510, 610, 710, 810, 910, 1010, 1110, 1210

Object side surface

111, 211, 311, 411, 511, 611, 711, 811, 911, 1011, 1111, 1211

Image side surface: 112, 212, 312, 412, 512, 612, 712, 812, 912, 1012, 1112, 1212

Second lens: 120, 220, 320, 420, 520, 620, 720, 820, 920, 1020, 1120, 1220

Object side surface

121, 221, 321, 421, 521, 621, 721, 821, 921, 1021, 1121, 1221

Image side surface: 122, 222, 322, 422, 522, 622, 722, 822, 922, 1022, 1122, 1222

130, 230, 330, 430, 530, 630, 730, 830, 930, 1030, 1130, 1230 of third lens

Object side surfaces 131, 231, 331, 431, 531, 631, 731, 831, 931, 1031, 1131, 1231

Image side surface: 132, 232, 332, 432, 532, 632, 732, 832, 932, 1032, 1132, 1232

Fourth lens element

140, 240, 340, 440, 540, 640, 740, 840, 940, 1040, 1140, 1240

Object side surfaces 141, 241, 341, 441, 541, 641, 741, 841, 941, 1041, 1141 and 1241

Image side surfaces 142, 242, 342, 442, 542, 642, 742, 842, 942, 1042, 1142, 1242

Fifth lens element (150, 250, 350, 450, 550, 650, 750, 850, 950, 1050, 1150, 1250)

Object side surfaces 151, 251, 351, 451, 551, 651, 751, 851, 951, 1051, 1151, 1251

Image side surface

152, 252, 352, 452, 552, 652, 752, 852, 952, 1052, 1152, 1252

Sixth lens element

160, 260, 360, 460, 560, 660, 760, 860, 960, 1060, 1160, 1260

Object side surfaces 161, 261, 361, 461, 561, 661, 761, 861, 961, 1061, 1161, 1261

Image side surfaces 162, 262, 362, 462, 562, 662, 762, 862, 962, 1062, 1162, 1262

IR-filtering

filter elements

170, 270, 370, 470, 570, 670, 770, 870, 970, 1070, 1170, 1270

Imaging surface: 180, 280, 380, 480, 580, 680, 780, 880, 980, 1080, 1180, 1280

190, 290, 390, 490, 590, 690, 790, 890, 990, 1090, 1190, 1290

ATmax is the maximum value of the distance between any two adjacent lenses in the optical lens assembly for imaging

CT1 thickness of the first lens on the optical axis

CTmax is the maximum value of the thickness of each lens in the optical lens assembly for imaging on the optical axis

Minimum thickness of each lens on optical axis in CTmin-imaging optical lens assembly

f focal length of imaging optical lens assembly

f1 focal length of first lens

f2 focal length of second lens

f3 focal length of third lens

f4 focal length of fourth lens

f5 focal length of fifth lens

f6 focal length of sixth lens

Half of maximum viewing angle in HFOV-imaging optical lens assembly

ImgH maximum imaging height of imaging optical lens assembly

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

R2 radius of curvature of image-side surface of first lens element

R7 radius of curvature of object-side surface of fourth lens

R8 radius of curvature of image-side surface of fourth lens element

R10 radius of curvature of image-side surface of fifth lens element

R11 radius of curvature of object-side surface of sixth lens

R12 radius of curvature of image-side surface of sixth lens element

Distance on optical axis from the SD: aperture to the image side surface of the sixth lens

T12 distance between the first and second lenses on optical axis

T23 distance between the second and third lenses on optical axis

T34 distance between the third and fourth lenses on optical axis

T45 distance between the fourth lens and the fifth lens on optical axis

Distance TD between object-side surface of first lens and image-side surface of sixth lens

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

Y11 maximum effective radius of object-side surface of first lens

Y62 maximum effective radius of image-side surface of sixth lens element

Yc62 perpendicular to optical axis from critical point on image-side surface of sixth lens element

Detailed Description

The invention will be described in detail with reference to the following drawings, which are provided for illustration purposes and the like:

the imaging 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 and a sixth lens element. Wherein, the imaging optical lens group has six lenses.

The first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element may each have an air gap on the optical axis between two adjacent lens elements, i.e., the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element and the sixth lens element may be six single non-cemented (non-cemented) lens elements. Since the process of bonding the lens is more complicated than that of non-bonding lens, especially the bonding surface of the two lenses needs to have a curved surface with high accuracy so as to achieve high degree of adhesion when the two lenses are bonded, and in the bonding process, the shift defect caused by deviation is more likely to affect the overall optical imaging quality. Therefore, the first lens to the sixth lens can be six single non-adhesive lenses, and the problem caused by adhesive lenses is effectively avoided.

At least one of the object-side surface and the image-side surface of the first lens element has at least one inflection point. Thereby, correction of the aberration at the off-axis is facilitated.

The second lens element with positive refractive power has an object-side surface being convex at a paraxial region. Therefore, the lens system can provide enough light converging capability at the object side, and is beneficial to shortening the total length of the lens system and keeping the miniaturization of the lens system.

The third lens element with positive refractive power has at least one inflection point on at least one of an object-side surface and an image-side surface thereof. Therefore, the third lens element and the second lens element can effectively balance the converging capability of light rays at the object side end, so as to avoid excessive aberration caused by excessive refractive power of the single lens element.

The fourth lens element with positive refractive power has an object-side surface that is concave at a paraxial region and an image-side surface that is convex at a paraxial region. Therefore, the symmetry of the third lens can be improved, and the generation of aberration can be favorably slowed down.

The fifth lens element with positive refractive power has an object-side surface that is concave at a paraxial region and an image-side surface that is convex at a paraxial region. Therefore, the symmetry of the optical lens group for imaging is increased, and the sensitivity is reduced to improve the image quality.

The sixth lens element may have a negative refractive power, which helps to correct the Petzval sum (Petzval sum) to make the image plane flatter. In addition, the image-side surface of the sixth lens element is concave at a paraxial region thereof, such that the principal point thereof can be shifted toward the object side, thereby reducing the total track length. In addition, the image side surface of the sixth lens element has at least one point of inflection for further correcting the off-axis aberrations.

The imaging optical lens assembly further comprises an aperture, and the aperture can be configured between the first lens element and the third lens element. An axial distance between the stop and the image-side surface of the sixth lens element is SD, and an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, which satisfies the following conditions: 0.65< SD/TD. Therefore, the position of the aperture can be balanced, and the trend of the light beam can be effectively controlled so as to have enough view field angle and imaging height.

The optical lens assembly for imaging has a focal length f, and an axial distance TL from the object-side surface of the first lens element to an imaging plane, which satisfies the following conditions: 0.70< TL/f < 2.85. Therefore, the lens group can have enough visual angle to capture images in a large range, and is beneficial to controlling the total length of the lens group so as to achieve the purpose of miniaturization. Preferably, it may further satisfy the following condition: 0.70< TL/f < 2.45. More preferably, it further satisfies the following conditions: 0.70< TL/f ≦ 1.66.

Half of the maximum viewing angle of the optical lens group for imaging is HFOV, which satisfies the following conditions: 0.70< tan (hfov) < 0.98. Therefore, the camera shooting device has a sufficient shooting range, and can effectively suppress distortion to avoid image deformation.

A radius of curvature of the image-side surface of the fifth lens element is R10, and a radius of curvature of the object-side surface of the sixth lens element is R11, wherein: -0.95< R10/R11< 0.85. Therefore, the surface shape change of the lens is controlled to improve the light path regulation efficiency, so that the lens achieves a better optimization effect.

The focal length of the first lens is f1, and the focal length of the fourth lens is f4, which satisfies the following conditions: -0.80< f4/f 1. Therefore, the configuration of the refractive power of the imaging optical lens group can be effectively controlled, so as to avoid excessive aberration generated at the object side end.

The focal length of the first lens is f1, and the focal length of the sixth lens is f6, which satisfies the following conditions: -5.0< f6/f1< 0.50. Therefore, the refractive power of the near object side end and the near image side end can be balanced to enhance the control capability of the image side end, and further improve the imaging quality.

A radius of curvature of the object-side surface of the fourth lens element is R7, and a radius of curvature of the image-side surface of the fourth lens element is R8, wherein the following conditions are satisfied: 0< (R7+ R8)/(R7-R8) < 5.0. Therefore, the situation that the fourth lens is difficult to form due to overlarge shape change of the fourth lens can be avoided, and the manufacturing yield is further influenced.

The focal length of the second lens is f2, and the focal length of the third lens is f3, which satisfies the following conditions: 0< f2/f3< 1.50. Therefore, the control capability of the second lens is enhanced, and the overlarge volume of the imaging optical lens group is avoided.

The thickness of the first lens element along the optical axis is CT1, the distance between the first lens element and the second lens element along the optical axis is T12, and the distance between the second lens element and the third lens element along the optical axis is T23, which satisfies the following conditions: 0.20< (T12+ T23)/CT1< 1.50. Therefore, the space utilization rate of the imaging optical lens group is improved, the space waste is avoided, meanwhile, enough assembling space is ensured to be beneficial to the assembling of the lens, and the qualification rate can be maintained.

The maximum value of the distance between two adjacent lenses in the imaging optical lens assembly on the optical axis is ATmax, and the minimum value of the thickness of each lens in the imaging optical lens assembly on the optical axis is CTmin, which can satisfy the following conditions: ATmax/CTmin < 2.0. Therefore, the size of each lens and the thickness proportion of the lens can be properly configured, assembly and manufacture are facilitated, and better space utilization rate is achieved.

The maximum effective radius of the object-side surface of the first lens element is Y11, and the maximum effective radius of the image-side surface of the sixth lens element is Y62, which satisfy the following conditions: Y11/Y62< 0.90. Therefore, the light path can be controlled, enough image height and a larger photosensitive area can be ensured to receive light, and the image brightness can be improved. Referring to fig. 25, a schematic diagram of parameters Y11 and Y62 of the optical lens assembly for imaging according to the first embodiment of the invention is shown.

The focal length of the fifth lens is f5, and the focal length of the sixth lens is f6, which satisfies the following conditions: -0.85< f6/f5< 2.0. Therefore, the refractive power of the object side end and the image side end can be balanced to enhance the control capability of the image side end, and further control the total length.

The imaging optical lens assembly may have at least two lenses with an abbe number less than 30. That is, at least two lenses with an abbe number smaller than 30 among the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens can be used. Therefore, the focusing positions of the light rays with different wave bands can be effectively balanced, so that the situation of image overlapping is avoided.

The distance between the second lens element and the third lens element is T23, the distance between the third lens element and the fourth lens element is T34, and the distance between the fourth lens element and the fifth lens element is T45, which satisfies the following conditions: 0.45< T34/(T23+ T45). Therefore, the lens groups can form a symmetrical structure and configuration, and the image quality is improved.

The maximum value of the distance between two adjacent lenses in the imaging optical lens assembly on the optical axis is ATmax, the maximum imaging height of the imaging optical lens assembly is ImgH (half of the total length of the diagonal lines of the effective sensing area of the electronic photosensitive element), which satisfies the following conditions: ATmax/ImgH ≦ 0.23. Therefore, the space can be fully utilized, and meanwhile, the light receiving device has enough area to receive light.

The maximum value of the distance between two adjacent lenses in the imaging optical lens assembly on the optical axis is ATmax, and the maximum value of the thickness of each lens in the imaging optical lens assembly on the optical axis is CTmax, which can satisfy the following conditions: 1.1< CTmax/ATmax < 5.0. Therefore, the configuration of the lens in the optical lens group for imaging can be effectively balanced, and the imaging quality is improved while the sensitivity is reduced.

An axial distance TD between the object-side surface and the image-side surface of the sixth lens element, a vertical distance Yc62 between a critical point of the image-side surface of the sixth lens element and the optical axis, wherein: 1.0< TD/Yc62< 4.0. Therefore, the aberration of the off-axis field can be corrected, and the field curvature can be effectively controlled. Referring to fig. 25, a schematic diagram of a parameter Yc62 in the optical lens assembly for imaging according to the first embodiment of the invention is shown. A Critical Point (Critical Point) of the image-side surface of the sixth lens element is a tangent Point on a tangent line between a tangent plane perpendicular to the optical axis and the image-side surface of the sixth lens element; note that the critical point is not located on the optical axis.

A radius of curvature of the object-side surface of the sixth lens element is R11, and a radius of curvature of the image-side surface of the sixth lens element is R12, wherein: 0.50< (R11+ R12)/(R11-R12) < 2.80. Therefore, the surface shape of the sixth lens can be effectively controlled, and stray light caused by excessive bending of the lens is avoided.

A radius of curvature of the object-side surface of the first lens element is R1, and a radius of curvature of the image-side surface of the first lens element is R2, wherein the following conditions are satisfied: (R1-R2)/(R1+ R2) < 0.50. Therefore, the shape of the first lens can be effectively controlled, and astigmatism can be corrected favorably.

The focal length of the imaging optical lens assembly is f, and the distance between the first lens element and the second lens element on the optical axis is T12, which satisfies the following conditions: 0< T12/f < 0.10. Therefore, the distance between the first lens and the second lens can be effectively shortened, and the miniaturization of the optical lens group for imaging is facilitated.

In the imaging optical lens assembly disclosed in the present invention, the aperture can be configured as a front aperture or a middle aperture. The front diaphragm means that the diaphragm is arranged between the object to be shot and the first lens, and the middle diaphragm means that the diaphragm is arranged between the first lens and the imaging surface. If the diaphragm is a front diaphragm, a longer distance can be generated between the Exit Pupil (Exit Pupil) and the imaging surface, so that the Exit Pupil has 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 view angle of the system is favorably enlarged, and the lens group has the advantage of a wide-angle lens.

In the imaging optical lens assembly disclosed in the present invention, the lens material can be plastic or glass. When the lens is made of glass, the degree of freedom of the refractive power configuration can be increased. In addition, when the lens is made of plastic, the production cost can be effectively reduced. In addition, an Aspheric Surface (ASP) can be arranged on the surface of the lens, the ASP can be easily made into shapes other than a spherical surface, more control variables are obtained for reducing the aberration, and the number of the lenses required to be used is further reduced, so that the total optical length can be effectively reduced.

In the optical lens assembly for imaging disclosed in the present invention, 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 at the position close to the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located at the position of the lens surface near the optical axis. If the refractive power or focal length of the lens element does not define the position of the lens region, it means that the refractive power or focal length of the lens element can be the refractive power or focal length of the lens element at the paraxial region.

In the imaging optical lens assembly disclosed in the present invention, the imaging surface of the imaging optical lens assembly may be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing the object side, depending on the corresponding electro-optic device.

The optical lens assembly for imaging of the present invention may be provided with at least one Stop, which may be located before the first lens element, between the lens elements or after the last lens element, and the Stop may be a flare Stop (Glare Stop) or a Field Stop (Field Stop), for reducing stray light, which is helpful to improve image quality.

The present invention further provides an image capturing device, which comprises the imaging optical lens assembly and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the imaging optical lens assembly. Preferably, the image capturing device may further include a lens barrel, a Holder Member (Holder Member), or a combination thereof.

Referring to fig. 26, 27, 28 and 29, the image capturing device 10 can be applied to electronic devices such as a smart phone (as shown in fig. 26), a tablet computer (as shown in fig. 27), a wearable device (as shown in fig. 28) and a driving recorder (as shown in fig. 29). Preferably, the electronic device may further include a control unit, a display unit, a storage unit, a Random Access Memory (RAM), or a combination thereof.

The optical lens group for imaging is further applied to an optical system for moving focusing according to requirements, and has the characteristics of excellent aberration correction and good imaging quality. The invention can also be applied to electronic devices such as three-dimensional (3D) image acquisition, digital cameras, mobile devices, digital flat panels, smart televisions, network monitoring equipment, driving recorders, backing developing devices, motion sensing game machines, wearable devices and the like in many aspects. The electronic device disclosed in the foregoing is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the image capturing device of the present invention.

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 view 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 in the first embodiment from left to right. As shown in fig. 1, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electronic photosensitive element 190. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element 110, an aperture stop 100, 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, an infrared-cut Filter (IR-cut Filter)170, and an image plane 180. The electron sensor 190 is disposed on the image plane 180. The lenses (110-160) of the imaging optical lens group are six.

The first lens element 110 with negative refractive power has a concave object-side surface 111 at a paraxial region and a convex image-side surface 112 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric, and the object-side surface 111 and the image-side surface 112 have at least one inflection point.

The second lens element 120 with positive refractive power has a convex object-side surface 121 at a paraxial region and a concave image-side surface 122 at a paraxial region, and is made of plastic material.

The third lens element 130 with positive refractive power has a convex object-side surface 131 at a paraxial region and a concave image-side surface 132 at a paraxial region, and both surfaces are aspheric, and the object-side surface 131 and the image-side surface 132 both have at least one inflection point.

The fourth lens element 140 with positive refractive power has a concave object-side surface 141 at a paraxial region and a convex image-side surface 142 at a paraxial region, and is made of plastic material.

The fifth lens element 150 with positive refractive power has a concave object-side surface 151 at a paraxial region and a convex image-side surface 152 at a paraxial region, and is made of plastic material.

The sixth lens element 160 with negative refractive power has a convex object-side surface 161 at a paraxial region and a concave image-side surface 162 at a paraxial region, and both surfaces are aspheric, and the image-side surface 162 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has two lens elements each having an abbe number smaller than 30. As shown in table one below, the abbe numbers of the third lens 130 and the fifth lens 150 are both less than 30.

The infrared ray , excluding , is made of glass and disposed between the sixth lens element 160 and the image plane 180, and does not affect the focal length of the optical lens assembly for imaging.

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

in the imaging optical lens group of the first embodiment, the focal length of the imaging optical lens group is F, the aperture value (F-number) of the imaging optical lens group is Fno, and half of the maximum field angle in the imaging optical lens group is HFOV, and the numerical values thereof are as follows: f 1.96 millimeters (mm), Fno 1.95, HFOV 39.3 degrees (deg.).

The thickness of the first lens element 110 on the optical axis is CT1, the distance between the first lens element 110 and the second lens element 120 on the optical axis is T12, and the distance between the second lens element 120 and the third lens element 130 on the optical axis is T23, which satisfies the following conditions: (T12+ T23)/CT1 ═ 0.62.

The distance between the second lens element 120 and the third lens element 130 is T23, the distance between the third lens element 130 and the fourth lens element 140 is T34, and the distance between the fourth lens element 140 and the fifth lens element 150 is T45, which satisfies the following conditions: T34/(T23+ T45) is 1.14.

The focal length of the optical lens assembly for imaging is f, and the distance T12 between the first lens element 110 and the second lens element 120 satisfies the following conditions: t12/f is 0.02.

The maximum value of the distance between two adjacent lenses in the imaging optical lens group on the optical axis is ATmax, and the maximum value of the thickness of each lens in the imaging optical lens group on the optical axis is CTmax, which satisfies the following conditions: CTmax/ATmax is 2.58. In the present embodiment, the thickness of the fourth lens element 140 on the optical axis is greater than the thickness of the other lens elements on the optical axis, and CTmax is the thickness of the fourth lens element 140 on the optical axis. In addition, in the present embodiment, the distance between the third lens element 130 and the fourth lens element 140 on the optical axis is greater than the distance between the other two adjacent lens elements on the optical axis, and thus ATmax is the distance between the third lens element 130 and the fourth lens element 140 on the optical axis.

The maximum value of the distance between two adjacent lenses in the imaging optical lens group on the optical axis is ATmax, the minimum value of the thickness of each lens in the imaging optical lens group on the optical axis is CTmin, and the following conditions are satisfied: ATmax/CTmin is 0.96. In the present embodiment, the thickness of the first lens element 110 on the optical axis is smaller than the thickness of the other lens elements on the optical axis, and therefore CTmin is the thickness of the first lens element 110 on the optical axis.

The maximum value of the distance between two adjacent lenses in the imaging optical lens group on the optical axis is ATmax, the maximum imaging height of the imaging optical lens group is ImgH, and the following conditions are satisfied: ATmax/ImgH is 0.10.

A radius of curvature of the first lens object-side surface 111 is R1, and a radius of curvature of the first lens image-side surface 112 is R2, which satisfy the following conditions: (R1-R2)/(R1+ R2) — 0.18.

A radius of curvature of the fourth lens object-side surface 141 is R7, and a radius of curvature of the fourth lens image-side surface 142 is R8, which satisfy the following conditions: (R7+ R8)/(R7-R8) ═ 1.13.

A radius of curvature R11 of the sixth lens object-side surface 161, a radius of curvature R12 of the sixth lens image-side surface 162, which satisfies the following conditions: (R11+ R12)/(R11-R12) ═ 2.31.

A radius of curvature of the image-side surface 152 of the fifth lens element is R10, and a radius of curvature of the object-side surface 161 of the sixth lens element is R11, which satisfy the following conditions: R10/R11 ═ 0.46.

The focal length of the second lens 120 is f2, and the focal length of the third lens 130 is f3, which satisfies the following conditions: f2/f3 is 0.19.

The focal length of the first lens 110 is f1, and the focal length of the fourth lens 140 is f4, which satisfies the following conditions: f4/f1 is-0.08.

The focal length of the fifth lens 150 is f5, and the focal length of the sixth lens 160 is f6, which satisfies the following conditions: f6/f5 is-0.11.

The focal length of the first lens 110 is f1, and the focal length of the sixth lens 160 is f6, which satisfies the following conditions: f6/f1 equals 0.11.

The maximum effective radius of the first lens object-side surface 111 is Y11, and the maximum effective radius of the sixth lens image-side surface 162 is Y62, which satisfy the following conditions: Y11/Y62 equals 0.56.

An axial distance between the stop 100 and the sixth lens element image-side surface 162 is SD, and an axial distance between the first lens element object-side surface 111 and the sixth lens element image-side surface 162 is TD, which satisfy the following conditions: SD/TD is 0.85.

An axial distance TD between the object-side surface 111 and the image-side surface 162 of the sixth lens element, and a vertical distance Yc62 between a critical point of the image-side surface 162 of the sixth lens element and the optical axis satisfy the following conditions: TD/Yc62 is 2.53.

The optical lens assembly for imaging has a focal length f, and an axial distance TL from the object-side surface 111 of the first lens element to the image plane 180 satisfies the following condition: TL/f is 1.53.

Half of the maximum viewing angle in the optical lens group for imaging is HFOV, which satisfies the following conditions: tan (hfov) ═ 0.82.

The following table one and table two 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 millimeters (mm), and surfaces 0 to 16 sequentially represent surfaces from an object side to an image side. Table two shows the aspheric data of the first embodiment, where k is the cone coefficient in the aspheric curve equation, and a4 to a16 represent 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 will not be described herein.

< second embodiment >

Referring to fig. 3 and fig. 4, wherein fig. 3 is a schematic view of an image capturing apparatus 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 includes an optical lens assembly (not labeled) for image formation and an electronic photosensitive element 290. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element 210, an aperture stop 200, 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, an infrared-cut Filter (IR-cut Filter)270 and an image plane 280. The electron sensor 190 is disposed on the image plane 180. The imaging optical lens group has six lenses (210-260).

The first lens element 210 with positive refractive power has a convex object-side surface 211 at a paraxial region and a concave image-side surface 212 at a paraxial region, and is made of plastic material.

The second lens element 220 with positive refractive power has a convex object-side surface 221 at a paraxial region and a concave image-side surface 222 at a paraxial region, and is made of plastic material.

The third lens element 230 with positive refractive power has a convex object-side surface 231 at a paraxial region and a concave image-side surface 232 at a paraxial region, and is aspheric, and the object-side surface 231 and the image-side surface 232 have at least one inflection point.

The fourth lens element 240 with positive refractive power has a convex object-side surface 241 at a paraxial region and a convex image-side surface 242 at a paraxial region, and is made of plastic material.

The fifth lens element 250 with positive refractive power has a concave object-side surface 251 and a convex image-side surface 252 at a paraxial region, and both surfaces are aspheric.

The sixth lens element 260 with negative refractive power has a convex object-side surface 261 and a concave image-side surface 262, both surfaces being aspheric, and the image-side surface 262 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has two lens elements each having an abbe number smaller than 30. As shown in table three below, the abbe numbers of the third lens 230 and the fifth lens 250 are both less than 30.

The infrared ray , excluding , is made of glass and is disposed between the sixth lens element 260 and the image plane 280, and does not affect the focal length of the optical lens assembly for imaging.

Please refer to the following table three and table four.

In the second embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< third embodiment >

Referring to fig. 5 and fig. 6, wherein fig. 5 is a schematic view of an image capturing apparatus according to a third embodiment of the invention, and fig. 6 is a graph showing spherical aberration, astigmatism and distortion in order from left to right in the third embodiment. As shown in fig. 5, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electronic photosensitive element 390. The imaging 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, an infrared-cut Filter 370 and an image plane 380. The electro-optic element 390 is disposed on the image plane 380. The lenses (310-360) of the imaging optical lens group are six.

The first lens element 310 with negative refractive power has a convex object-side surface 311 at a paraxial region and a concave image-side surface 312 at a paraxial region, and is aspheric, wherein the object-side surface 311 and the image-side surface 312 have at least one inflection point.

The second lens element 320 with positive refractive power has a convex object-side surface 321 at a paraxial region and a concave image-side surface 322 at a paraxial region, and is made of plastic material.

The third lens element 330 with positive refractive power has a convex object-side surface 331 at a paraxial region and a concave image-side surface 332 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric, and both the object-side surface 331 and the image-side surface 332 have at least one inflection point.

The fourth lens element 340 with positive refractive power has a concave object-side surface 341 at a paraxial region and a convex image-side surface 342 at a paraxial region, and is made of plastic material.

The fifth lens element 350 with positive refractive power has a concave object-side surface 351 at a paraxial region and a convex image-side surface 352 at a paraxial region, and is made of plastic material.

The sixth lens element 360 with negative refractive power has a convex object-side surface 361 at a paraxial region and a concave image-side surface 362 at a paraxial region, both surfaces being aspheric, and the image-side surface 362 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has four lens elements each having an abbe number smaller than 30. As shown in table five below, the abbe numbers of the first lens 310, the third lens 330, the fifth lens 350 and the sixth lens 360 are all less than 30.

The infrared ray , excluding , is made of glass and is disposed between the sixth lens element 360 and the image plane 380, and does not affect the focal length of the optical lens assembly for imaging.

Please refer to 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 definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< fourth embodiment >

Referring to fig. 7 and 8, wherein fig. 7 is a schematic view of an image capturing apparatus according to a fourth embodiment of the invention, and fig. 8 is a graph showing spherical aberration, astigmatism and distortion in the fourth embodiment from left to right. As shown in fig. 7, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electronic photosensitive element 490. The imaging 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, an infrared-cut Filter 470 and an image plane 480. The image sensor 490 is disposed on the image plane 480. The lenses (410-460) of the imaging optical lens group are six.

The first lens element 410 with negative refractive power has a convex object-side surface 411 at a paraxial region and a concave image-side surface 412 at a paraxial region, and is aspheric, and the object-side surface 411 and the image-side surface 412 both have at least one inflection point.

The second lens element 420 with positive refractive power has a convex object-side surface 421 at a paraxial region and a concave image-side surface 422 at a paraxial region, and is made of plastic material.

The third lens element 430 with positive refractive power has a convex object-side surface 431 at a paraxial region and a concave image-side surface 432 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric, and the object-side surface 431 and the image-side surface 432 have at least one inflection point.

The fourth lens element 440 with positive refractive power has a concave object-side surface 441 at a paraxial region and a convex image-side surface 442 at a paraxial region, and is made of plastic material.

The fifth lens element 450 with positive refractive power has a concave object-side surface 451 at a paraxial region and a convex image-side surface 452 at a paraxial region, and is made of plastic material.

The sixth lens element 460 with negative refractive power has a concave object-side surface 461 at a paraxial region and a concave image-side surface 462 at a paraxial region, and both surfaces are aspheric, and the image-side surface 462 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has four lens elements each having an abbe number smaller than 30. As shown in table seven below, the abbe numbers of the first lens 410, the third lens 430, the fifth lens 450 and the sixth lens 460 are all less than 30.

The optical element 470 of infrared ray excluding is made of glass, and is disposed between the sixth lens element 460 and the image plane 480, and does not affect the focal length of the optical lens assembly for imaging.

Please refer to 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 definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< fifth embodiment >

Referring to fig. 9 and 10, fig. 9 is a schematic view of an image capturing apparatus according to a fifth embodiment of the invention, and fig. 10 is a graph showing spherical aberration, astigmatism and distortion in the fifth embodiment from left to right. As shown in fig. 9, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electronic photosensitive element 590. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element 510, a second lens element 520, an aperture stop 500, a third lens element 530, a fourth lens element 540, a fifth lens element 550, a sixth lens element 560, an infrared-cut Filter 570 and an image plane 580. The electronic photosensitive element 590 is disposed on the image plane 580. The lenses (510-560) of the imaging optical lens group are six.

The first lens element 510 with positive refractive power has a concave object-side surface 511 at a paraxial region thereof and a convex image-side surface 512 at a paraxial region thereof, and is made of plastic material, wherein both surfaces are aspheric, and the object-side surface 511 and the image-side surface 512 have at least one inflection point.

The second lens element 520 with positive refractive power has a convex object-side surface 521 at a paraxial region and a concave image-side surface 522 at a paraxial region, and is made of plastic material.

The third lens element 530 with positive refractive power has a convex object-side surface 531 at a paraxial region and a concave image-side surface 532 at a paraxial region, and both surfaces are aspheric, and the object-side surface 531 and the image-side surface 532 have at least one inflection point.

The fourth lens element 540 with positive refractive power has a convex object-side surface 541 at a paraxial region and a convex image-side surface 542 at a paraxial region, and is made of plastic material.

The fifth lens element 550 with positive refractive power has a concave object-side surface 551 at a paraxial region and a convex image-side surface 552 at a paraxial region, and is made of plastic material.

The sixth lens element 560 with negative refractive power has a convex object-side surface 561 at a paraxial region and a concave image-side surface 562 at a paraxial region, and both surfaces are aspheric, and the image-side surface 562 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has two lens elements each having an abbe number smaller than 30. As shown in table nine below, the abbe numbers of the third lens 530 and the fifth lens 550 are both less than 30.

The infrared ray , excluding , is made of glass and is disposed between the sixth lens element 560 and the image plane 580, and does not affect the focal length of the optical lens assembly for imaging.

Please refer 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 definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< sixth embodiment >

Referring to fig. 11 and 12, wherein fig. 11 is a schematic view of an image capturing apparatus according to a sixth embodiment of the invention, and fig. 12 is a graph showing spherical aberration, astigmatism and distortion in the sixth embodiment from left to right. As shown in fig. 11, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electro-optic device 690. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element 610, a second lens element 620, an aperture stop 600, a third lens element 630, a fourth lens element 640, a fifth lens element 650, a sixth lens element 660, an infrared-cut Filter element 670 and an image plane 680. The electro-optic device 690 is disposed on the image plane 680. The lenses (610-660) of the imaging optical lens group are six.

The first lens element 610 with negative refractive power has a concave object-side surface 611 at a paraxial region and a convex image-side surface 612 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric, and both the object-side surface 611 and the image-side surface 612 have at least one inflection point.

The second lens element 620 with positive refractive power has a convex object-side surface 621 at a paraxial region and a concave image-side surface 622 at a paraxial region, and is made of plastic material.

The third lens element 630 with positive refractive power has a convex object-side surface 631 and a concave image-side surface 632 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric, and the object-side surface 631 and the image-side surface 632 both have at least one inflection point.

The fourth lens element 640 with positive refractive power has a convex object-side surface 641 at a paraxial region and a convex image-side surface 642 at a paraxial region, and is made of plastic material.

The fifth lens element 650 with positive refractive power has a concave object-side surface 651 at a paraxial region and a convex image-side surface 652 at a paraxial region, and is made of plastic material.

The sixth lens element 660 with negative refractive power has a convex object-side surface 661 at a paraxial region and a concave image-side surface 662 at a paraxial region, both surfaces being aspheric, and the image-side surface 662 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has two lens elements each having an abbe number smaller than 30. As shown in table eleven below, the abbe numbers of the third lens 630 and the fifth lens 650 are both less than 30.

The infrared ray , except for the optical element 670, is made of glass, and is disposed between the sixth lens element 660 and the image plane 680 without affecting the focal length of the optical lens assembly for imaging.

Please refer 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 definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< seventh embodiment >

Referring to fig. 13 and 14, wherein fig. 13 is a schematic view of an image capturing apparatus according to a seventh embodiment of the invention, and fig. 14 is a graph showing spherical aberration, astigmatism and distortion in the seventh embodiment from left to right. As shown in fig. 13, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electronic photosensitive element 790. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element 710, a second lens element 720, an aperture stop 700, a third lens element 730, a fourth lens element 740, a fifth lens element 750, a sixth lens element 760, an infrared-cut Filter 770 and an image plane 780. The electronic photosensitive element 790 is disposed on the image plane 780. The number of the lenses (710) and 760) of the imaging optical lens group is six.

The first lens element 710 with negative refractive power has a concave object-side surface 711 at a paraxial region and a convex image-side surface 712 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric, and the object-side surface 711 and the image-side surface 712 both have at least one inflection point.

The second lens element 720 with positive refractive power has a convex object-side surface 721 at a paraxial region and a concave image-side surface 722 at a paraxial region, and is made of plastic material.

The third lens element 730 with positive refractive power has a convex object-side surface 731 at a paraxial region and a concave image-side surface 732 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric and the object-side surface 731 has at least one inflection point.

The fourth lens element 740 with positive refractive power has a convex object-side surface 741 at a paraxial region and a convex image-side surface 742 at a paraxial region, and is made of plastic material.

The fifth lens element 750 with positive refractive power has a concave object-side surface 751 at a paraxial region and a convex image-side surface 752 at a paraxial region, and is made of plastic material.

The sixth lens element 760 with negative refractive power has a concave object-side surface 761 at a paraxial region and a concave image-side surface 762 at a paraxial region, wherein both surfaces are aspheric and the image-side surface 762 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has two lens elements each having an abbe number smaller than 30. As shown in the thirteenth table below, the abbe numbers of the first lens 710 and the third lens 730 are both less than 30.

The infrared ray , excluding , is made of glass, and is disposed between the sixth lens element 760 and the image plane 780 without affecting the focal length of the optical lens assembly for imaging.

Please refer to the following thirteen tables 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 definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< eighth embodiment >

Referring to fig. 15 and 16, wherein fig. 15 is a schematic view of an image capturing apparatus according to an eighth embodiment of the present invention, and fig. 16 is a graph showing spherical aberration, astigmatism and distortion in the eighth embodiment from left to right. As shown in fig. 15, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electro-photosensitive device 890. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element 810, an aperture stop 800, 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, an infrared-cut Filter 870 and an image plane 880. The electrophotographic photosensitive member 890 is disposed on the image plane 880. The lenses (810-860) of the imaging optical lens group are six.

The first lens element 810 with positive refractive power has a concave object-side surface 811 at a paraxial region and a convex image-side surface 812 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric, and the object-side surface 811 and the image-side surface 812 have at least one inflection point.

The second lens element 820 with positive refractive power has a convex object-side surface 821 at a paraxial region and a convex image-side surface 822 at a paraxial region, and is made of plastic material.

The third lens element 830 with positive refractive power has a concave object-side surface 831 at a paraxial region and a convex image-side surface 832 at a paraxial region, and both surfaces are aspheric, and the image-side surface 832 has at least one inflection point.

The fourth lens element 840 with positive refractive power has a concave object-side surface 841 at a paraxial region and a convex image-side surface 842 at a paraxial region, and is made of plastic material.

The fifth lens element 850 with positive refractive power has a concave object-side surface 851 at a paraxial region and a convex image-side surface 852 at a paraxial region, and is made of plastic material.

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 a paraxial region thereof, wherein both surfaces are aspheric and the image-side surface 862 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has three lens elements each having an abbe number smaller than 30. As shown in table fifteen below, the third lens 830, the fifth lens 850, and the sixth lens 860 all have abbe numbers less than 30.

The infrared ray , excluding , is made of glass and disposed between the sixth lens element 860 and the image plane 880, and does not affect the focal length of the optical lens assembly for imaging.

Please refer to table fifteen and table sixteen below.

In the eighth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< ninth embodiment >

Referring to fig. 17 and fig. 18, wherein fig. 17 is a schematic view of an image capturing apparatus according to a ninth embodiment of the invention, and fig. 18 is a graph showing spherical aberration, astigmatism and distortion in the ninth embodiment from left to right. As shown in fig. 17, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electronic photosensitive element 990. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element 910, an aperture stop 900, 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, an infrared-cut Filter 970 and an image plane 980. The electronic photosensitive element 990 is disposed on the imaging plane 980. The lenses (910-960) of the imaging optical lens group are six.

The first lens element 910 with positive refractive power has a convex object-side surface 911 at a paraxial region and a convex image-side surface 912 at a paraxial region, both surfaces being aspheric, and the image-side surface 912 has at least one inflection point.

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

The third lens element 930 with positive refractive power has a convex object-side surface 931 at a paraxial region thereof, and a convex image-side surface 932 at a paraxial region thereof, both surfaces being aspheric, and the object-side surface 931 has at least one inflection point.

The fourth lens element 940 with positive refractive power has a concave object-side surface 941 at a paraxial region and a convex image-side surface 942 at a paraxial region, and is made of plastic material.

The fifth lens element 950 with positive refractive power has a concave object-side surface 951 at a paraxial region and a convex image-side surface 952 at a paraxial region, and is made of plastic material.

The sixth lens element 960 with negative refractive power has a convex object-side surface 961 at a paraxial region and a concave image-side surface 962 at a paraxial region, both surfaces being aspheric, and the image-side surface 962 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has a single lens with an abbe number smaller than 30. As shown in the following table seventeen, the abbe number of the sixth lens 960 is less than 30.

The infrared ray except the optical element 970 is made of glass, and is disposed between the sixth lens element 960 and the image plane 980, and does not affect the focal length of the optical lens assembly for imaging.

Please refer to the following seventeen and eighteen tables.

In the ninth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< tenth embodiment >

Referring to fig. 19 and fig. 20, wherein fig. 19 is a schematic view of an image capturing apparatus according to a tenth embodiment of the invention, and fig. 20 is a graph showing spherical aberration, astigmatism and distortion in the tenth embodiment from left to right. As shown in fig. 19, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electro-optic device 1090. The imaging optical lens assembly 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, an infrared-cut Filter 1070 and an image plane 1080. The electronic photosensitive element 1090 is disposed on the imaging surface 1080. The lenses (1010-1060) of the optical lens group for imaging are six.

The first lens element 1010 with negative refractive power has an object-side surface 1011 being convex at a paraxial region thereof and an image-side surface 1012 being concave at the paraxial region thereof, and is made of plastic material.

The second lens element 1020 with positive refractive power has an object-side surface 1021 being convex in a paraxial region thereof and an image-side surface 1022 being concave in the paraxial region thereof, and is made of plastic material.

The third lens element 1030 with positive refractive power has a concave object-side surface 1031 at a paraxial region and a convex image-side surface 1032 at a paraxial region, and both surfaces thereof are aspheric, and the image-side surface 1032 has at least one inflection point.

The fourth lens element 1040 with positive refractive power has a concave object-side surface 1041 at a paraxial region and a convex image-side surface 1042 at a paraxial region, and is made of plastic material.

The fifth lens element 1050 with positive refractive power has a concave object-side surface 1051 at a paraxial region and a convex image-side surface 1052 at a paraxial region, and is made of plastic material.

The sixth lens element 1060 with negative refractive power has a convex object-side surface 1061 at a paraxial region and a concave image-side surface 1062 at a paraxial region, which are both aspheric, and the image-side surface 1062 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has two lens elements each having an abbe number smaller than 30. As shown in the nineteenth list below, the abbe numbers of the first lens 1010 and the sixth lens 1060 are both smaller than 30.

The infrared ray excluding the optical element 1070 is made of glass, and is disposed between the sixth lens element 1060 and the imaging plane 1080, and does not affect the focal length of the optical lens assembly for imaging.

Please refer to the nineteen and twenty tables below.

In the tenth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< eleventh embodiment >

Referring to fig. 21 and fig. 22, fig. 21 is a schematic view of an image capturing apparatus according to an eleventh embodiment of the invention, and fig. 22 is a graph showing spherical aberration, astigmatism and distortion in the eleventh embodiment from left to right. As shown in fig. 21, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electronic photosensitive element 1190. The imaging 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, an infrared-cut Filter (IR-cut Filter)1170, and an image plane 1180. The electrophotographic photosensitive member 1190 is disposed on the imaging surface 1180. The imaging optical lens group comprises six lenses (1110-1160).

The first lens element 1110 with positive refractive power has a convex object-side surface 1111 at a paraxial region and a convex image-side surface 1112 at a paraxial region, and is aspheric, and the object-side surface 1111 has at least one inflection point.

The second lens element 1120 with positive refractive power has a convex object-side surface 1121 at a paraxial region and a concave image-side surface 1122 at a paraxial region, and is made of plastic material.

The third lens element 1130 with positive refractive power has a convex object-side surface 1131 at a paraxial region thereof and a concave image-side surface 1132 at a paraxial region thereof, and both surfaces are aspheric, and the object-side surface 1131 and the image-side surface 1132 both have at least one inflection point.

The fourth lens element 1140 with positive refractive power has a convex object-side surface 1141 at a paraxial region and a convex image-side surface 1142 at a paraxial region, and is made of plastic material.

The fifth lens element 1150 with positive refractive power has a concave object-side surface 1151 at a paraxial region and a convex image-side surface 1152 at a paraxial region, and is made of plastic material.

The sixth lens element 1160 with negative refractive power has a convex object-side surface 1161 and a concave image-side surface 1162, both surfaces of which are aspheric, and the image-side surface 1162 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has two lens elements each having an abbe number smaller than 30. As shown in the twenty-first table below, the abbe numbers of the second lens 1120 and the fifth lens 1150 are both less than 30.

The infrared ray , excluding the optical element 1170, is made of glass, and is disposed between the sixth lens element 1160 and the image plane 1180, and does not affect the focal length of the optical lens assembly for imaging.

Please refer to the following table twenty-one and table twenty-two.

In the eleventh embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

< twelfth embodiment >

Referring to fig. 23 and fig. 24, wherein fig. 23 is a schematic view of an image capturing apparatus according to a twelfth embodiment of the invention, and fig. 24 is a graph showing spherical aberration, astigmatism and distortion from left to right in sequence. As shown in fig. 23, the image capturing device includes an optical lens assembly (not labeled) for image formation and an electronic photosensitive element 1290. The imaging optical lens assembly includes, in order from an object side to an image side, a first lens element 1210, an aperture stop 1200, a second lens element 1220, a third lens element 1230, a fourth lens element 1240, a fifth lens element 1250, a sixth lens element 1260, an infrared-cut Filter (IR-cut Filter)1270, and an image plane 1280. The electro-optical sensor 1290 is disposed on the image plane 1280. The lenses (1210-1260) of the optical lens group for imaging are six.

The first lens element 1210 with negative refractive power has a convex object-side surface 1211 at a paraxial region and a concave image-side surface 1212 at a paraxial region, and both surfaces thereof are aspheric, and the object-side surface 1211 has at least one inflection point.

The second lens element 1220 with positive refractive power has a convex object-side surface 1221 at a paraxial region and a concave image-side surface 1222 at a paraxial region, and is made of plastic material.

The third lens element 1230 with positive refractive power has an object-side surface 1231 being convex in a paraxial region thereof and an image-side surface 1232 being concave in a paraxial region thereof, both surfaces being aspheric, and both the object-side surface 1231 and the image-side surface 1232 have at least one inflection point.

The fourth lens element 1240 with positive refractive power has a convex object-side surface 1241 at a paraxial region and a concave image-side surface 1242 at a paraxial region, and is made of plastic material.

The fifth lens element 1250 with positive refractive power has a convex object-side surface 1251 at a paraxial region and a convex image-side surface 1252 at a paraxial region, and is made of plastic material.

The sixth lens element 1260 with negative refractive power has a concave object-side surface 1261 at a paraxial region and a concave image-side surface 1262 at a paraxial region, both surfaces being aspheric, and the image-side surface 1262 has at least one inflection point.

In the present embodiment, the optical lens assembly for imaging has four lens elements each having an abbe number smaller than 30. As shown in the following table twenty three, the first lens 1210, the third lens 1230, the fifth lens 1250, and the sixth lens 1260 all have abbe numbers less than 30.

The optical element 1270 of the infrared ray excluding is made of glass, and is disposed between the sixth lens element 1260 and the image plane 1280 without affecting the focal length of the optical lens assembly for imaging.

Please refer to twenty-three and twenty-four of the following table.

In the twelfth embodiment, the curve equation of the aspherical surface represents the form as in the first embodiment. In addition, the definitions described in the following table are the same as those in the first embodiment, and are not repeated herein.

Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto. Various modifications and alterations may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the scope defined by the appended claims.

Claims

1. An optical imaging 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 and a sixth lens element, wherein an object-side surface of the first lens element is concave at a paraxial region, the second lens element has positive refractive power, an object-side surface of the third lens element is convex at the paraxial region and an image-side surface of the third lens element is concave at the paraxial region, an image-side surface of the sixth lens element is concave at the paraxial region, and an image-side surface of the sixth lens element has at least one inflection point;

wherein the total number of the lenses of the optical lens assembly for imaging is six, an abbe number of at least two lenses of the optical lens assembly for imaging is less than 30, a maximum effective radius of the object-side surface of the first lens element is Y11, a maximum effective radius of the image-side surface of the sixth lens element is Y62, a focal length of the optical lens assembly for imaging is f, an axial distance from the object-side surface of the first lens element to an imaging plane is TL, a radius of curvature of the object-side surface of the fourth lens element is R7, and a radius of curvature of the image-side surface of the fourth lens element is R8, and the following conditions are satisfied:

Y11/Y62<0.90；

TL/f is more than or equal to 1.53 and less than 2.85; and

0<(R7+R8)/(R7-R8)≤1.13。

2. the imaging optical lens assembly of claim 1, wherein the sixth lens element with negative refractive power has at least one inflection point on at least one of an object-side surface and an image-side surface of the first lens element.

3. The optical lens assembly as claimed in claim 1, wherein the sixth lens element has a convex object-side surface at a paraxial region.

4. The optical lens assembly as claimed in claim 1, wherein an image-side surface of the fourth lens element is convex at a paraxial region, and the first, second, third, fourth, fifth and sixth lens elements are substantially non-cemented lenses.

5. The optical lens assembly as claimed in claim 1, wherein each of the second, third, fourth, fifth and sixth lenses has an aspheric object-side surface and image-side surface, and the optical lens assembly further comprises an aperture stop disposed between the first and third lenses.

6. The optical lens assembly for imaging as claimed in claim 1, wherein the focal length of the first lens element is f1, and the focal length of the sixth lens element is f6, which satisfies the following conditions:

-5.0<f6/f1<0.50。

7. the optical lens assembly as claimed in claim 1, wherein the first lens element with negative refractive power has a convex object-side surface at a paraxial region thereof.

8. The optical lens assembly for imaging as claimed in claim 1, wherein the focal length of the first lens element is f1, and the focal length of the fourth lens element is f4, which satisfies the following conditions:

-0.80<f4/f1。

9. the optical lens assembly of claim 1, wherein an axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, and a vertical distance between a critical point of the image-side surface of the sixth lens element and an optical axis is Yc62, wherein the following conditions are satisfied:

1.0<TD/Yc62<4.0。

10. the imaging optical lens assembly according to claim 1, wherein the maximum value of the distance between two adjacent lenses in the imaging optical lens assembly on the optical axis is ATmax, and the maximum value of the thickness of each lens in the imaging optical lens assembly on the optical axis is CTmax, which satisfies the following conditions:

1.1<CTmax/ATmax<5.0。

11. the optical lens assembly as claimed in claim 1, wherein the object-side surface of the fifth lens element is concave at a paraxial region.

12. The optical lens assembly as claimed in claim 1, wherein the image-side surface of the fifth lens element is convex at paraxial region.

13. The optical lens assembly for imaging as claimed in claim 1, wherein the focal length of the fifth lens element is f5, and the focal length of the sixth lens element is f6, which satisfies the following conditions:

-0.85<f6/f5<2.0。

14. the optical lens assembly as claimed in claim 1, wherein a radius of curvature of the object-side surface of the sixth lens element is R11, and a radius of curvature of the image-side surface of the sixth lens element is R12, wherein:

0.50<(R11+R12)/(R11-R12)<2.80。

15. the optical lens assembly for imaging as claimed in claim 1, wherein the distance between the second lens element and the third lens element on the optical axis is T23, the distance between the third lens element and the fourth lens element on the optical axis is T34, and the distance between the fourth lens element and the fifth lens element on the optical axis is T45, which satisfies the following conditions:

0.45<T34/(T23+T45)。

16. the optical lens assembly as claimed in claim 1, wherein the radius of curvature of the object-side surface of the first lens element is R1, and the radius of curvature of the image-side surface of the first lens element is R2, which satisfy the following conditions:

(R1-R2)/(R1+R2)<0.50。

17. the imaging optical lens assembly of claim 1, wherein the first lens element with negative refractive power has at least one inflection point on at least one of an object-side surface and an image-side surface thereof.

18. An image capturing device, comprising:

an imaging optical lens group according to claim 1; and

and the electronic photosensitive element is arranged on the imaging surface of the imaging optical lens group.

19. An electronic device, comprising:

the image capturing apparatus of claim 18.