CN108873269B

CN108873269B - Image capturing lens assembly and image capturing device

Info

Publication number: CN108873269B
Application number: CN201810652742.0A
Authority: CN
Inventors: 黄歆璇
Original assignee: Largan Precision Co Ltd
Current assignee: Largan Precision Co Ltd
Priority date: 2015-04-15
Filing date: 2015-04-15
Publication date: 2020-11-13
Anticipated expiration: 2035-04-15
Also published as: CN106154512A; CN106154512B; CN108873269A

Abstract

The present invention discloses an image capturing lens assembly including, 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 first lens element with positive refractive power has a convex object-side surface at paraxial region. The second lens element has negative refractive power. The image side surface of the third lens element is concave at a paraxial region. At least one of the object-side surface and the image-side surface of the fourth lens element is aspheric. The fifth lens element with negative refractive power has a concave image-side surface at a paraxial region, and at least one of the object-side surface and the image-side surface of the fifth lens element is aspheric. The sixth lens element with positive refractive power has an object-side surface and an image-side surface, at least one of which is aspheric. The invention also discloses an image capturing device with the image pickup lens group.

Description

Image capturing lens assembly and image capturing device

The application is a divisional application, and the application date of the original application is as follows: 15 days 4 months 2015; the application numbers are: 201510177861.1, respectively; the invention has the name: the image capturing device comprises a camera lens group, an image capturing device and an electronic device.

Technical Field

The present disclosure relates to image capturing lens assemblies and image capturing devices, and particularly to an image capturing lens assembly and an image capturing device suitable for an electronic device.

Background

In recent years, with the rapid development of miniaturized camera lenses, the demand of miniature image capture modules is increasing, and the photosensitive elements of general camera lenses are not limited to two types, namely, a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS) Sensor, and with the advance of Semiconductor process technology, the pixel size of the photosensitive elements is reduced, and in addition, the development trend of electronic products is to have a good function, a light weight, a small size, and a good imaging quality, so that the miniaturized camera lenses are the mainstream in the current market.

The conventional high-pixel miniaturized camera lens mounted on an electronic Device mostly adopts a five-piece lens structure, but due to the prevalence of high-specification mobile devices such as a high-order Smart Phone (Smart Phone), a Wearable Device (Wearable Device), and a Tablet Personal Computer (Tablet Personal Computer), the requirements of the miniaturized camera lens on pixel and imaging quality are increased, and the conventional five-piece lens group cannot meet the requirements of higher orders.

At present, although a general conventional six-piece optical system is developed. However, the total optical length of the conventional six-piece optical system is easily too long, and has problems of too large chromatic aberration, uneven refractive power distribution, severe peripheral image aberration, and insufficient relative illumination.

Disclosure of Invention

The present invention provides a photographing lens assembly and an image capturing device, wherein the photographing lens assembly includes six lenses. The first lens element of the image capturing lens assembly has positive refractive power, which helps to focus the positive refractive power of the image capturing lens assembly on the object side, thereby facilitating miniaturization of the image capturing lens assembly. The second lens element has negative refractive power and is useful for correcting chromatic aberration of the photographing lens assembly. The sixth lens element with positive refractive power can uniformly distribute the refractive power of the photographing lens assembly.

The present invention provides a photographing lens assembly including, 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 first lens element with positive refractive power has a convex object-side surface at paraxial region. The second lens element has negative refractive power. The image side surface of the third lens element is concave at a paraxial region. At least one of the object-side surface and the image-side surface of the fourth lens element is aspheric. The fifth lens element with negative refractive power has a concave image-side surface at a paraxial region, and at least one of the object-side surface and the image-side surface of the fifth lens element is aspheric. The sixth lens element with positive refractive power has an object-side surface and an image-side surface, at least one of which is aspheric. The total number of the image capturing lens assembly is six, the focal length of the image capturing lens assembly is f, the focal length of the first lens element is f1, the focal length of the fifth lens element is f5, the focal length of the i-th lens element is fi, the axial distance from the image-side surface of the sixth lens element to the image plane is BL, the axial distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element is TD, and the following conditions are satisfied:

l f1| < | fi |, where i ═ 2, 3, 4, 5, 6;

0.1< BL/TD < 0.25; and

-1.0<f/f5<0。

the invention provides an image capturing device, which comprises the image capturing lens assembly and an electronic photosensitive element, wherein the electronic photosensitive element is arranged on an imaging surface of the image capturing lens assembly.

The present invention further provides a photographing lens assembly including, 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 first lens element with positive refractive power has a convex object-side surface at paraxial region. The second lens element has negative refractive power. The image side surface of the third lens element is concave at a paraxial region. At least one of the object-side surface and the image-side surface of the fourth lens element is aspheric. The fifth lens element with negative refractive power has a concave image-side surface at a paraxial region, and at least one of the object-side surface and the image-side surface of the fifth lens element is aspheric. The sixth lens element with positive refractive power has an object-side surface and an image-side surface, at least one of which is aspheric. The total number of lenses in the camera lens group is six. A focal length of the first lens element is f1, a focal length of the i lens element is fi, an axial distance between the image-side surface of the sixth lens element and the image plane is BL, 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, an axial distance between the second lens element and the third lens element is T23, and an axial distance between the third lens element and the fourth lens element is T34, which satisfies the following conditions:

l f1| < | fi |, where i ═ 2, 3, 4, 5, 6;

0.1< BL/TD < 0.25; and

0.39≤T23/T34<5.0。

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

When f1 fi satisfies the above conditions, the positive refractive power of the image capturing lens assembly is focused on the object side of the image capturing lens assembly, thereby effectively reducing the size of the image capturing lens assembly and further facilitating the miniaturization of the image capturing lens assembly.

When BL/TD satisfies the above condition, the back focal length of the image capturing lens assembly can be properly adjusted, so that the image capturing lens assembly still has enough space for placing the filter element or other optical components while maintaining miniaturization.

When f/f5 satisfies the above condition, it is helpful to shorten the back focal length of the image taking lens group to maintain its miniaturization and to reduce the sensitivity of the image taking lens group.

When T23/T34 satisfies the above conditions, the distance between the second lens element, the third lens element and the fourth lens element can be properly configured, which is helpful for maintaining good image quality and spatial configuration, and is also beneficial for assembling the camera lens assembly, thereby improving the product 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 diagram of an electronic device according to the present invention;

FIG. 20 is a schematic diagram of another electronic device according to the present invention;

FIG. 21 is a schematic diagram of yet another electronic device according to the present invention.

Wherein the reference numerals

Image capturing device: 10

Aperture ratio of 100: 100, 200, 300, 400, 500, 600, 700, 800, 900

First lens: 110, 210, 310, 410, 510, 610, 710, 810, 910

Object side surface

111, 211, 311, 411, 511, 611, 711, 811, 911

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

Second lens element

120, 220, 320, 420, 520, 620, 720, 820, 920

Object side surface

121, 221, 321, 421, 521, 621, 721, 821, 921

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

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

Object side surface

131, 231, 331, 431, 531, 631, 731, 831, 931

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

140, 240, 340, 440, 540, 640, 740, 840, 940 fourth lens

Object side surfaces 141, 241, 341, 441, 541, 641, 741, 841, 941

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

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

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

Image side surface

152, 252, 352, 452, 552, 652, 752, 852, 952

Sixth lens element

160, 260, 360, 460, 560, 660, 760, 860, 960

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

Image side surface: 162, 262, 362, 462, 562, 662, 762, 862, 962

Infrared

filtering filter element

170, 270, 370, 470, 570, 670, 770, 870, 970

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

190, 290, 390, 490, 590, 690, 790, 890, 990 of electron-sensitive element

BL: distance between the image side surface of the sixth lens element and the image plane on the optical axis

CT 3: thickness of the third lens on the optical axis

f focal length of photographing lens assembly

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

Fno is aperture value of camera lens group

Half of maximum viewing angle in HFOV/image pickup lens assembly

Nmax: a maximum value among refractive indexes of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens

R5: radius of curvature of object-side surface of third lens

R6: radius of curvature of image-side surface of the third lens

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

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

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

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

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

T23: the distance between the second lens and the third lens on the optical axis

T34: the distance between the third lens and the fourth lens on the optical axis

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

SD: distance from aperture to image side surface of sixth lens element on optical axis

TD: the distance from the object side surface of the first lens to the image side surface of the sixth lens on the optical axis

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 image capturing 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 lens group has six lens elements with refractive power.

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 and the sixth lens element have an air space on an optical axis, that is, 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-bonded (non-bonded) lenses with refractive power. Since the process of the cemented lens is more complicated than that of the non-cemented lens, especially the cemented surface of the two lenses needs to have a curved surface with high accuracy so as to achieve high degree of conformity when the two lenses are cemented, and during the cementing process, the shift defect caused by the offset is more likely to affect the overall optical imaging quality. Therefore, the first lens element to the sixth lens element in the photographing lens assembly can be six single non-cemented lens elements with refractive power, thereby effectively improving the problems caused by cemented lens elements.

The first lens element with positive refractive power has an object-side surface being convex at a paraxial region. Therefore, the size of the camera lens group can be effectively reduced.

The second lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region. Therefore, the chromatic aberration of the camera lens group is corrected.

The third lens element with positive refractive power has an object-side surface being convex at a paraxial region. Therefore, the refractive power distribution of the shooting lens group can be balanced, and the sensitivity of the shooting lens group is favorably reduced.

The fourth lens element with negative 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 Petzval's sum of the shooting lens group can be effectively corrected, so that the imaging surface is flatter, and correction of astigmatism is enhanced.

The fifth lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region, and has at least one inflection point on one of the object-side surface and the image-side surface. Therefore, the main point of the camera lens group is far away from the image side end, and the back focal length of the camera lens group is further shortened, so that the miniaturization of the camera lens group is facilitated. In addition, the angle of the light rays of the off-axis field of view incident on the photosensitive element can be suppressed, so that the receiving efficiency of the image photosensitive element is increased, and the aberration of the off-axis field of view is further corrected.

The sixth lens element with positive refractive power has a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region, and at least one inflection point may be disposed on the object-side surface or the image-side surface of the sixth lens element. Therefore, the lens group can be used for uniformly configuring the refractive power of the camera lens group, and simultaneously correcting the peripheral aberration of the image, thereby improving the imaging quality.

The distance between the second lens element and the third lens element is T23, and the distance between the third lens element and the fourth lens element is T34, which satisfies the following conditions: 0< T23/T34< 5.0. Therefore, the distances among the second lens, the third lens and the fourth lens can be properly configured, so that the good image quality and space configuration are kept, the camera lens group is assembled, and the product yield is improved. Preferably, it satisfies the following conditions: 0< T23/T34< 2.5. More preferably, it satisfies the following conditions: 0< T23/T34< 1.5. Still more preferably, it satisfies the following conditions: 0.1< T23/T34< 1.0.

The image capturing lens assembly further includes an aperture. 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: 0.75< SD/TD < 1.2. Therefore, the total optical length of the camera lens assembly can be shortened, and simultaneously, sufficient relative illumination is maintained, so that the camera lens assembly has the requirements of miniaturization and good imaging quality.

The imaging lens assembly has a focal length f, 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: 0.25< | R10-R11 |/f. Therefore, the difference of the mirror curvature between the fifth lens and the sixth lens can be increased, and the aberration correction effect is improved.

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: -0.5< (R7-R8)/(R7+ R8) < 0.5. Therefore, the curvature of the fourth lens is proper, poor lens forming can be avoided, and the manufacturing yield is improved.

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: -1.0< R12/| R11| <0. Therefore, the aberration of the camera lens group is corrected.

A maximum value among refractive indexes of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is Nmax, which may satisfy the following condition: 1.50< Nmax < 1.70. Therefore, the refractive index of each lens can be properly adjusted, so that the material of the lens is more appropriate.

The distance TL from the object-side surface of the first lens element to an imaging plane on the optical axis may satisfy the following condition: TL <8.0 millimeters (mm). Therefore, the total length of the camera lens group can be effectively shortened, and the camera lens group is more suitable for being carried on a thinned electronic device.

The focal length of the first lens is f1, and the focal length of the i-th lens is fi (for example, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, and the focal length of the sixth lens is f6), which satisfies the following conditions: i f1| <ifi |, where i ═ 2, 3, 4, 5, 6. Therefore, the positive refractive power of the image pickup lens assembly is favorably concentrated on the object side of the image pickup lens assembly, the volume of the image pickup lens assembly can be effectively reduced, and the miniaturization of the image pickup lens assembly is further facilitated.

At least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens may include at least one inflection point. That is, the object side surfaces and the image surfaces of the first, second, third, fourth, fifth, and sixth lenses may have at least one inflection point. Therefore, the peripheral aberration of the camera lens group is corrected, and better optical imaging quality is provided.

The lens assembly can be formed without any refractive power between the aperture and the first lens element. That is, the aperture stop can be disposed between the object and the first lens or between the first lens and the second lens according to the optical design requirement. Therefore, the optical telecentric effect and the large viewing angle are well balanced.

The thickness of the third lens element along the optical axis is CT3, and the distance between the third lens element and the fourth lens element along the optical axis is T34, which satisfies the following conditions: 0.5< CT3/T34< 1.9. Therefore, the optical configuration of the third lens element can be adjusted, so as to effectively balance the refractive power of the photographing lens assembly.

The focal length of the image capturing lens assembly is f, and the focal length of the fifth lens element is f5, which satisfies the following conditions: -1.0< f/f5< 0. Therefore, the back focal length of the camera lens group is favorably shortened to keep the miniaturization of the camera lens group, and the sensitivity of the camera lens group can be reduced.

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< (R11-R12)/(R11+ R12) < 1.0. Therefore, the astigmatism of the shooting lens group is corrected, and the imaging quality is further improved.

A radius of curvature of the object-side surface of the third lens element is R5, and a radius of curvature of the image-side surface of the third lens element is R6, wherein the following conditions are satisfied: -3.5< (R5+ R6)/(R5-R6) < 1.2. Therefore, the spherical aberration of the shooting lens group can be further corrected.

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< T45/T34< 1.5. Therefore, the total length of the shooting lens group is favorably reduced so as to keep the miniaturization of the shooting lens group.

The focal length of the image capturing lens assembly is f, and the focal length of the fourth lens element is f4, which satisfies the following conditions: -1.0< f/f4< 0.5. Therefore, the back focal length of the camera lens group is favorably shortened to keep the miniaturization of the camera lens group, and the sensitivity of the camera lens group can be reduced.

An axial distance BL from the image-side surface of the sixth lens element to the image plane, and an axial distance TD from the object-side surface of the first lens element to the image-side surface of the sixth lens element satisfy the following conditions: 0.1< BL/TD < 0.25. Therefore, the back focal length of the camera lens group can be properly adjusted, so that the camera lens group still has enough space for placing a filter element or other optical components while maintaining the miniaturization.

The arrangement of the diaphragm in the camera lens set can be a front diaphragm or a middle diaphragm. 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, the Exit Pupil (Exit Pupil) of the photographing lens group can generate a longer distance from the imaging plane, so that the photographing lens group 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 disposed in the middle, it is helpful to enlarge the field angle of the system, so that the lens assembly has the advantage of wide-angle lens.

In the camera lens assembly disclosed by the invention, the lens can be made of 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 lens assembly for photographing disclosed in the present invention, if the lens surface is convex and the position of the convex is not defined, it means that the lens surface is convex at the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at the paraxial region. If the refractive power or focal length of the lens element does not define the position of the area, it means that the refractive power or focal length of the lens element is the refractive power or focal length of the lens element at the paraxial region.

In the Image capturing lens assembly disclosed in the present invention, the Image Surface of the Image capturing 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 electronic photosensitive element.

The lens assembly for photographing disclosed in the present invention can be provided with at least one Stop, the position of which can be set in front of the first lens, between the lenses or behind the last lens, the type of the Stop can be a flare Stop (Glare Stop) or a Field Stop (Field Stop) to reduce stray light and to improve image quality.

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

Referring to fig. 19, 20 and 21, the image capturing apparatus 10 can be applied to a smart phone (as shown in fig. 19), a tablet computer (as shown in fig. 20), a wearable apparatus (as shown in fig. 21) and the like in many ways. Preferably, the electronic device may further include a Control unit (Control Units), a Display unit (Display Units), a Storage unit (Storage Units), a Random Access Memory (RAM), or a combination thereof.

The camera lens group can be applied to a mobile focusing optical system according to the 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, tablet computers, smart televisions, network monitoring equipment, automobile data recorders, backing-up developing devices, motion sensing game machines, wearable devices and the like in many aspects. The electronic device 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 a lens assembly (not shown) and an electronic photosensitive element 190. The imaging 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, an infrared-cut Filter 170 and an image plane 180. The electron sensor 190 is disposed on the image plane 180. The lens group with refractive power in the image pickup lens system comprises six lenses (110-160). Any two adjacent lenses of 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 and the sixth lens element 160 have an air gap therebetween on the optical axis.

The first lens element 110 with positive refractive power has a convex object-side surface 111 at a paraxial region and a concave image-side surface 112 at a paraxial region, and is made of plastic material.

The second lens element 120 with negative 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 is made of plastic material.

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 negative refractive power has a convex object-side surface 151 at a paraxial region and a concave image-side surface 152 at a paraxial region, and is aspheric, wherein the object-side surface 151 has at least one inflection point and the image-side surface 152 has at least one inflection point.

The sixth lens element 160 with positive refractive power has a concave object-side surface 161 at a paraxial region and a convex 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.

The ir-cut filter 170 is made of glass, and is disposed between the sixth lens element 160 and the image plane 180 without affecting the focal length of the image capturing lens assembly.

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

(ii) a Wherein:

x: the distance between a point on the aspheric surface, which is Y away from the optical axis, and the relative distance between the point and a tangent plane tangent to the intersection point on 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 first embodiment of the image capturing lens assembly, the focal length of the image capturing lens assembly is F, the aperture value (F-number) of the image capturing lens assembly is Fno, and half of the maximum field of view in the image capturing lens assembly is HFOV, which has the following values: f is 3.33 millimeters (mm), Fno is 2.90, HFOV is 31.0 degrees (deg.).

A maximum value among refractive indexes of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, and the sixth lens 160 is Nmax, which satisfies the following condition: nmax is 1.650.

The thickness of the third lens element 130 on the optical axis is CT3, and the distance between the third lens element 130 and the fourth lens element 140 on the optical axis is T34, which satisfies the following conditions: CT3/T34 equals 1.26.

The distance between the second lens element 120 and the third lens element 130 is T23, and the distance between the third lens element 130 and the fourth lens element 140 is T34, which satisfies the following conditions: T23/T34 is 0.84.

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: T45/T34 equals 0.25.

A radius of curvature of the object-side surface 131 of the third lens element is R5, and a radius of curvature of the image-side surface 132 of the third lens element is R6, which satisfy the following conditions: (R5+ R6)/(R5-R6) — 1.63.

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) — 0.06.

A radius of curvature of the sixth lens object-side surface 161 is R11, and a radius of curvature of the sixth lens image-side surface 162 is R12, which satisfy the following conditions: (R11-R12)/(R11+ R12) ═ 0.10.

A radius of curvature of the sixth lens object-side surface 161 is R11, and a radius of curvature of the sixth lens image-side surface 162 is R12, which satisfy the following conditions: r12/| R11| -0.82.

The focal length of the image capturing lens assembly is f, the radius of curvature of the image-side surface 152 of the fifth lens element is R10, and the radius of curvature of the object-side surface 161 of the sixth lens element is R11, wherein: 1.55 | R10-R11 |/f.

The focal length of the image capturing lens assembly is f, and the focal length of the fourth lens element 140 is f4, which satisfies the following conditions: f/f4 is 0.11.

The focal length of the image capturing lens assembly is f, and the focal length of the fifth lens element 150 is f5, which satisfies the following conditions: f/f5 is-0.62.

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 0.99.

An axial distance BL from the sixth lens element image-side surface 162 to the image plane 180, and an axial distance TD from the first lens element object-side surface 111 to the sixth lens element image-side surface 162 satisfy the following conditions: BL/TD is 0.17.

The distance TL from the object-side surface 111 to the image plane 180 on the optical axis satisfies the following condition: TL 4.03 mm.

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 a14 represent the 4 th to 14 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 a lens assembly (not shown) and an electronic photosensitive element 290. The imaging 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, an ir-cut filter 270 and an image plane 280. The electron sensor 290 is disposed on the image plane 280. The lens group with refractive power in the image capturing lens system comprises six lenses (210-260). Any two adjacent lenses of 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 and the sixth lens element 260 have an air space therebetween on the optical axis.

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 negative 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 made of plastic material.

The fourth lens element 240 with negative refractive power has a concave 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 negative refractive power has a concave object-side surface 251 and a convex image-side surface 252 at a paraxial region, both surfaces being aspheric, and the image-side surface 252 has at least one inflection point.

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

The ir-cut filter 270 is made of glass, and is disposed between the sixth lens element 260 and the image plane 280 without affecting the focal length of the image capturing lens assembly.

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 a lens assembly (not shown) and an electronic photosensitive element 390. The imaging 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 ir-cut filter 370 and an image plane 380. The electro-optic element 390 is disposed on the image plane 380. The lens group with refractive power in the image capturing lens system comprises six lenses (310-360). Any two adjacent lenses of the first lens element 310, the second lens element 320, the third lens element 330, the fourth lens element 340, the fifth lens element 350 and the sixth lens element 360 have an air space on the optical axis.

The first lens element 310 with positive 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 made of plastic material.

The second lens element 320 with negative 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.

The fourth lens element 340 with negative 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 negative refractive power has a convex object-side surface 351 at a paraxial region and a concave image-side surface 352 at a paraxial region, and is aspheric, wherein the object-side surface 351 has at least one inflection point and the image-side surface 352 has at least one inflection point.

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

The ir-cut filter 370 is made of glass, and is disposed between the sixth lens element 360 and the image plane 380 without affecting the focal length of the camera lens assembly.

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 a lens assembly (not shown) and an electronic photosensitive element 490. The imaging lens assembly includes, in order from an object side to an image side, a first lens element 410, an aperture stop 400, 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 ir-cut filter 470 and an image plane 480. The image sensor 490 is disposed on the image plane 480. The lens group with refractive power comprises six lenses (410-460). Any two adjacent lenses of the first lens 410, the second lens 420, the third lens 430, the fourth lens 440, the fifth lens 450, and the sixth lens 460 have an air space on the optical axis.

The first lens element 410 with positive refractive power has a convex object-side surface 411 at a paraxial region and a convex image-side surface 412 at a paraxial region, and is made of plastic material.

The second lens element 420 with negative refractive power has a convex object-side surface 421 at a paraxial region and a concave image-side surface 422 at the 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 convex image-side surface 432 at a paraxial region, and is made of plastic material.

The fourth lens element 440 with negative 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 negative refractive power has a convex object-side surface 451 at a paraxial region and a concave image-side surface 452 at a paraxial region, and is aspheric, the object-side surface 451 has at least one inflection point and the image-side surface 452 has at least one inflection point.

The sixth lens element 460 with positive refractive power has a concave object-side surface 461 at a paraxial region and a convex image-side surface 462 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric, the object-side surface 461 has at least one inflection point, and the image-side surface 462 has at least one inflection point.

The ir-cut filter 470 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 camera lens assembly.

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 a lens assembly (not shown) and an electronic photosensitive element 590. The imaging 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 ir-cut filter element 570 and an image plane 580. The electronic photosensitive element 590 is disposed on the image plane 580. The lens group with refractive power comprises six lenses (510-560). Any two adjacent lenses of the first lens 510, the second lens 520, the third lens 530, the fourth lens 540, the fifth lens 550 and the sixth lens 560 have an air space on the optical axis.

The first lens element 510 with positive refractive power has a convex object-side surface 511 at a paraxial region and a concave image-side surface 512 at a paraxial region, and is made of plastic material.

The second lens element 520 with negative 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 is made of plastic material.

The fourth lens element 540 with negative refractive power has a concave 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 negative refractive power has a concave object-side surface 551 at a paraxial region and a concave image-side surface 552 at a paraxial region, both surfaces being aspheric, and the image-side surface 552 has at least one inflection point.

The sixth lens element 560 with positive refractive power has a concave object-side surface 561 at a paraxial region and a convex 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.

The ir-cut filter 570 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 image capturing lens assembly.

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 a lens assembly (not shown) and an electronic photosensitive element 690. The imaging 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 ir-cut filter 670 and an image plane 680. The electro-optic device 690 is disposed on the image plane 680. The lens group with refractive power in the image capturing lens system comprises six lenses (610-660). Any two adjacent lenses 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 and the sixth lens element 660 have an air gap therebetween on the optical axis.

The first lens element 610 with positive refractive power has a convex object-side surface 611 at a paraxial region and a concave image-side surface 612 at a paraxial region, and is made of plastic material.

The second lens element 620 with negative 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.

The fourth lens element 640 with positive refractive power has a concave 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 negative 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 positive refractive power has a concave object-side surface 661 at a paraxial region and a convex image-side surface 662 at a paraxial region, both surfaces being aspheric, and the image-side surface 662 has at least one inflection point.

The ir-cut filter 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 camera lens assembly.

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 a lens assembly (not shown) and an electronic photosensitive element 790. The imaging lens assembly includes, in order from an object side to an image side, a first lens element 710, an aperture stop 700, 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, an ir-cut filter 770 and an image plane 780. The electronic photosensitive element 790 is disposed on the image plane 780. The lens group with refractive power comprises six lenses (710-. Any two adjacent lenses of the first lens 710, the second lens 720, the third lens 730, the fourth lens 740, the fifth lens 750, and the sixth lens 760 have an air space on the optical axis.

The first lens element 710 with positive refractive power has a convex 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.

The second lens element 720 with negative refractive power has a concave 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 concave object-side surface 731 at a paraxial region and a convex image-side surface 732 at a paraxial region, and is made of plastic material.

The fourth lens element 740 with positive refractive power has a concave 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 negative refractive power has a convex object-side surface 751 at a paraxial region and a concave image-side surface 752 at a paraxial region, and is aspheric, wherein the object-side surface 751 has at least one inflection point and the image-side surface 752 has at least one inflection point.

The sixth lens element 760 with positive refractive power has a concave object-side surface 761 at a paraxial region and a convex 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.

The ir-cut filter 770 is made of glass and disposed between the sixth lens element 760 and the image plane 780 without affecting the focal length of the camera lens assembly.

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 a lens assembly (not shown) and an electro-optic device 890. The imaging 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 ir-cut filter 870 and an image plane 880. The electrophotographic photosensitive member 890 is disposed on the image plane 880. The lens group with refractive power comprises six lenses (810-860). Any two adjacent lenses of the first lens 810, the second lens 820, the third lens 830, the fourth lens 840, the fifth lens 850, and the sixth lens 860 have an air space on the optical axis.

The first lens element 810 with positive refractive power has a convex 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.

The second lens element 820 with negative refractive power has a convex object-side surface 821 at a paraxial region and a concave 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 convex object-side surface 831 at a paraxial region and a convex image-side surface 832 at a paraxial region, and is made of plastic material.

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 negative refractive power has a convex object-side surface 851 at a paraxial region and a concave image-side surface 852 at a paraxial region, and is aspheric, wherein the object-side surface 851 has at least one inflection point and the image-side surface 852 has at least one inflection point.

The sixth lens element 860 with positive refractive power has a concave object-side surface 861 at a paraxial region and a convex image-side surface 862 at a paraxial region, and is made of plastic material, wherein both surfaces are aspheric, the object-side surface 861 has at least one inflection point, and the image-side surface 862 has at least one inflection point.

The ir-cut filter 870 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 image capturing lens assembly.

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 a lens assembly (not shown) and an electronic photosensitive element 990. The imaging 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, an ir-cut filter 970 and an image plane 980. The electronic photosensitive element 990 is disposed on the imaging plane 980. The lens group with refractive power comprises six lenses (910-. Any two adjacent lenses of the first lens 910, the second lens 920, the third lens 930, the fourth lens 940, the fifth lens 950 and the sixth lens 960 have an air space on the optical axis.

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, and is made of plastic material.

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 the paraxial region thereof.

The third lens element 930 with positive refractive power has a convex object-side surface 931 at a paraxial region and a convex image-side surface 932 at a paraxial region, and is made of plastic material.

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 negative refractive power has an object-side surface 951 being convex in a paraxial region thereof and an image-side surface 952 being concave in a paraxial region thereof, and is aspheric, wherein the object-side surface 951 has at least one inflection point and the image-side surface 952 has at least one inflection point.

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

The ir-cut filter 970 is made of glass, and is disposed between the sixth lens element 960 and the image plane 980 without affecting the focal length of the camera lens assembly.

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.

The image capturing device can be mounted in the electronic device. The invention uses six lens groups with refractive power. The first lens element with positive refractive power can effectively reduce the volume of the photographing lens assembly. The second lens element has negative refractive power and is useful for correcting chromatic aberration of the photographing lens assembly. The sixth lens element with positive refractive power can uniformly distribute the refractive power of the photographing lens assembly. The sixth lens element has a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region, thereby facilitating correction of peripheral image aberration. When specific conditions are met, the distances among the second lens, the third lens and the fourth lens can be properly configured, so that good image quality and space configuration are kept, the camera lens group is assembled, and the product yield is improved. In addition, the total optical length of the image capturing lens assembly can be shortened while maintaining sufficient relative illumination.

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

1. An image capturing lens assembly, 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 and a sixth lens element, wherein:

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

wherein the total number of the image capturing lens assembly is six, the focal length of the image capturing lens assembly is f, the focal length of the first lens element is f1, the focal length of the fifth lens element is f5, the focal length of the i-th lens element is fi, the axial distance from the image-side surface of the sixth lens element to an image plane is BL, and the axial distance from the object-side surface of the first lens element to the image-side surface of the sixth lens element is TD, which satisfies the following conditions:

l f1| < | fi |, where i ═ 2, 3, 4, 5, 6;

0.1< BL/TD < 0.25; and

-1.0<f/f5<0。

2. the imaging lens assembly of claim 1, wherein the object-side surface of the third lens element is convex at a paraxial region.

3. The imaging lens assembly of claim 1, wherein the focal length of the imaging lens assembly is f, the radius of curvature of the image-side surface of the fifth lens element is R10, and the radius of curvature of the object-side surface of the sixth lens element is R11, wherein:

0.25<|R10-R11|/f。

4. the image capturing lens assembly of claim 1, wherein the fourth lens element has an object-side surface with a radius of curvature R7 and an image-side surface with a radius of curvature R8, wherein the following conditions are satisfied:

-0.5<(R7-R8)/(R7+R8)<0.5。

5. the image capturing lens assembly of claim 1, wherein the sixth lens element has an object-side surface with a radius of curvature R11 and an image-side surface with a radius of curvature R12, wherein the following conditions are satisfied:

-1.0<R12/|R11|<0。

6. the imaging lens group of claim 1, wherein the maximum value of the refractive indices of 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 is Nmax, which satisfies the following condition:

1.50<Nmax<1.70。

7. the image capturing lens assembly of claim 1, wherein an air space is disposed 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 and the sixth lens element, and an axial distance TL from an object-side surface of the first lens element to the image plane satisfies the following condition:

TL <8.0 millimeters (mm).

8. The imaging lens assembly of claim 1, wherein the second lens element has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region.

9. The imaging lens assembly of claim 1, wherein the object-side surface of the fourth lens element is concave at paraxial region.

10. The imaging lens assembly of claim 1, wherein the fourth lens element has negative refractive power.

11. The image capturing lens assembly of claim 1, wherein 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 are all made of plastic material.

12. The imaging lens assembly of claim 1, wherein the third lens element has an axial thickness CT3, and the third lens element is spaced apart from the fourth lens element by an axial distance T34, wherein the following conditions are satisfied:

0.5<CT3/T34<1.9。

13. the imaging lens assembly of claim 1, wherein the focal length of the imaging lens assembly is f, and the focal length of the fourth lens element is f4, satisfying the following condition:

-1.0<f/f4<0.5。

14. an image capturing device, comprising:

the imaging lens group of claim 1; and

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

15. An image capturing lens assembly, 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 and a sixth lens element, wherein:

wherein, the total number of the lens elements in the image capturing lens assembly is six, the focal length of the first lens element is f1, the focal length of the i-th lens element is fi, the axial distance between the image-side surface of the sixth lens element and an imaging plane is BL, the axial distance between the object-side surface of the first lens element and the image-side surface of the sixth lens element is TD, the axial distance between the second lens element and the third lens element is T23, and the axial distance between the third lens element and the fourth lens element is T34, which satisfies the following conditions:

l f1| < | fi |, where i ═ 2, 3, 4, 5, 6;

0.1< BL/TD < 0.25; and

0.39≤T23/T34<5.0。

16. the imaging lens assembly of claim 15, wherein the object-side surface of the third lens element is convex at a paraxial region.

17. The image capturing lens assembly of claim 15, wherein the focal length of the image capturing lens assembly is f, the radius of curvature of the image-side surface of the fifth lens element is R10, and the radius of curvature of the object-side surface of the sixth lens element is R11, wherein the following conditions are satisfied:

0.25<|R10-R11|/f。

18. the image capturing lens assembly of claim 15, wherein the fourth lens element has an object-side surface with a radius of curvature R7 and an image-side surface with a radius of curvature R8, wherein the following conditions are satisfied:

-0.5<(R7-R8)/(R7+R8)<0.5。

19. the image capturing lens assembly of claim 15, wherein the sixth lens element has an object-side surface with a radius of curvature R11 and an image-side surface with a radius of curvature R12, wherein the following conditions are satisfied:

-1.0<R12/|R11|<0。

20. the imaging lens group of claim 15, wherein the maximum value of the refractive indices of 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 is Nmax, which satisfies the following condition:

1.50<Nmax<1.70。

21. the image capturing lens assembly of claim 15, wherein an air space is disposed 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 and the sixth lens element, and an axial distance TL from an object-side surface of the first lens element to the image plane satisfies the following condition:

TL <8.0 millimeters (mm).

22. The imaging lens assembly of claim 15, wherein the second lens element has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region.

23. The image capturing lens assembly of claim 15, wherein the object-side surface of the fourth lens element is concave at paraxial region.

24. The imaging lens assembly of claim 15, wherein the fourth lens element has negative refractive power.

25. The image capturing lens assembly of claim 15, wherein 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 are all made of plastic material.

26. The imaging lens assembly of claim 15, wherein the focal length of the imaging lens assembly is f, and the focal length of the fourth lens element is f4, satisfying the following condition:

-1.0<f/f4<0.5。

27. an image capturing device, comprising:

the imaging lens group of claim 15; and