Optical lens assembly for imaging, imaging device and electronic device

Abstract

An optical lens assembly for image capturing includes six lenses. The six lenses are sequentially arranged along an optical path from an object side to an image side as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses respectively have an object side surface facing the object side direction and an image side surface facing the image side direction. The first lens object side surface is concave at a vicinity of an optical axis, and the first lens image side surface is convex at the vicinity of the optical axis. The third lens image side surface is concave at the vicinity of the optical axis. The sixth lens object side surface is convex at the vicinity of the optical axis. The sixth lens image side surface is concave at the vicinity of the optical axis, and the sixth lens image side surface is aspherical and has at least one inflection point. The total number of lenses in the optical lens assembly for image capturing is six. When certain conditions are met, the optical lens assembly for image capturing can simultaneously meet the requirements of miniaturization and high imaging quality. An image capturing device having the optical lens assembly for image capturing and an electronic device having the image capturing device are also disclosed.

Description

[0001] This application is a divisional application. The filing date of the original application is: June 8, 2020; the application number is: 202010511052.0; the invention title is: Optical lens group for imaging, imaging device and electronic device. Technical Field

[0002] The present invention relates to an optical lens group for imaging, an imaging device and an electronic device, in particular to an optical lens group for imaging and an imaging device applicable to an electronic device. Background Art

[0003] With the further improvement of semiconductor process technology, the performance of electronic photosensitive elements has been improved, and pixels can reach a smaller size. Therefore, an optical lens with high imaging quality has become an indispensable part.

[0004] With the rapid development of technology, the application range of electronic devices equipped with optical lenses is wider, and the requirements for optical lenses are more diverse. Since it is difficult for conventional optical lenses to balance the requirements such as imaging quality, sensitivity, aperture size, volume or viewing angle, the present invention provides an optical lens to meet the requirements. Summary of the Invention

[0005] The present invention provides an optical lens group for imaging, an imaging device and an electronic device. Among them, the optical lens group for imaging sequentially includes six lenses along the optical path from the object side to the image side. When specific conditions are met, the optical lens group for imaging provided by the present invention can simultaneously meet the requirements of miniaturization and high imaging quality.

[0006] The present invention provides an optical lens group for imaging, including six lenses. The six lenses are sequentially the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens along the optical path from the object side to the image side. The six lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction. The object-side surface of the first lens is concave near the optical axis, and the image-side surface of the first lens is convex near the optical axis. The image-side surface of the third lens is concave near the optical axis. The object-side surface of the sixth lens is convex near the optical axis. The image-side surface of the sixth lens is concave near the optical axis, the image-side surface of the sixth lens is an aspherical surface, and the image-side surface of the sixth lens has at least one inflection point. The total number of lenses in the optical lens group for imaging is six. The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the focal length of the optical lens group for imaging is f, the distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis is Dr4r5, and the distance between the third lens and the fourth lens on the optical axis is T34, which satisfy the following conditions:

[0007] 0.70 < TL / f < 5.0; and

[0008] 4.20 < Dr4r5 / T34 < 20.0

[0009] The present invention further provides an optical lens group for imaging, comprising six lenses. The six lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The six lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction. The object-side surface of the first lens is concave near the optical axis. The image-side surface of the fifth lens is concave near the optical axis. The image-side surface of the sixth lens is concave near the optical axis. The image-side surface of the sixth lens is an aspherical surface and has at least one inflection point. The total number of lenses in the optical lens group for imaging is six and further includes an aperture. The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the focal length of the optical lens group for imaging is f, the distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis is Dr4r5, the sum of the lens thicknesses of each lens in the optical lens group for imaging on the optical axis is ΣCT, and the distance from the aperture to the imaging surface on the optical axis is SL, which satisfy the following conditions:

[0010] 0.70 < TL / f < 5.0;

[0011] 0.30 < Dr4r5 / ΣCT < 2.50; and

[0012] 0.80 < SL / TL < 2.0.

[0013] The present invention further provides an optical lens group for imaging, comprising six lenses. The six lenses are, in order from the object side to the image side along the optical path, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The six lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction. The object-side surface of the first lens is concave near the optical axis. The image-side surface of the second lens is convex near the optical axis. The image-side surface of the sixth lens is concave near the optical axis. The image-side surface of the sixth lens is an aspherical surface and has at least one inflection point. The total number of lenses in the optical lens group for imaging is six. The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the focal length of the optical lens group for imaging is f, the distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis is Dr4r5, the sum of the lens thicknesses of each lens in the optical lens group for imaging on the optical axis is ΣCT, the thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which satisfy the following conditions:

[0014] 1.25 < TL / f < 2.60;

[0015] 0.30 < Dr4r5 / ΣCT < 2.50; and

[0016] CT1 / CT2 < 0.90.

[0017] The present invention further provides an optical lens group for imaging, comprising six lenses. The six lenses are sequentially the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens along the optical path from the object side to the image side. The six lenses respectively have an object-side surface facing the object side direction and an image-side surface facing the image side direction. The optical lens group for imaging further comprises a reflection element disposed between the first lens and the sixth lens. At least one of the six lenses has at least one inflection point, and at least one of the six lenses is made of plastic. The total number of lenses in the optical lens group for imaging is six. At least one of the lenses in the optical lens group for imaging is a non-circular lens. The distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, the focal length of the optical lens group for imaging is f, the maximum effective radius of the object-side surface of the first lens is Y11, the maximum imaging height of the optical lens group for imaging is ImgH, half of the maximum viewing angle of the optical lens group for imaging is HFOV, the shortest distance from the center of the non-circular lens to the outer diameter is Dmin, and the longest distance from the center of the non-circular lens to the outer diameter is Dmax, which satisfy the following conditions:

[0018] 0.70 < TL / f < 5.0;

[0019] 0.03 < Y11 / ImgH < 0.50;

[0020] 27.0 degrees < HFOV < 60.0 degrees; and

[0021] Dmin / Dmax < 0.80.

[0022] The present invention provides an imaging device, which comprises the aforementioned optical lens group for imaging and an electronic photosensitive element. The electronic photosensitive element is disposed on the imaging surface of the optical lens group for imaging, and the height of the imaging device is less than 8.0 mm.

[0023] The present invention provides an imaging device, which comprises the aforementioned optical lens group for imaging and an electronic photosensitive element. The electronic photosensitive element is disposed on the imaging surface of the optical lens group for imaging, and the short-side distance of the opening of the imaging device is less than 2.500 mm.

[0024] The present invention provides an electronic device, which comprises a display panel and an imaging device on the same side of the electronic device. The imaging device comprises the aforementioned optical lens group for imaging and an electronic photosensitive element, and the electronic photosensitive element is disposed on the imaging surface of the optical lens group for imaging.

[0025] When TL / f satisfies the above conditions, the total length of the optical lens group for imaging and the viewing angle size can be balanced to meet more diverse application device specifications.

[0026] When Dr4r5 / T34 meets the above conditions, there is enough space between the second and third lenses to place other optical elements, thereby achieving more diverse application designs.

[0027] When Dr4r5 / ΣCT meets the above conditions, it can balance the ratio between the distance between the second and third lenses and the lens thickness, so that there is enough space at a specific position to mitigate the optical path offset.

[0028] When the SL / TL meets the above conditions, the aperture position can be controlled so that the imaging optical lens group has a smaller object-side opening.

[0029] When CT1 / CT2 meets the above conditions, the center thickness ratio of the first lens and the second lens can be balanced to control the size of the imaging optical lens group.

[0030] When Y11 / ImgH meets the above conditions, it can be ensured that the imaging optical lens group still has enough area to receive light even with a small opening.

[0031] When HFOV meets the above conditions, it enables the imaging optical lens group to capture the most commonly used image range to meet the needs of most products.

[0032] When Dmin / Dmax meets the above conditions, module space can be effectively saved to meet the market demand for miniaturization. Attached Figure Description

[0033] Figure 1 A schematic cross-sectional view of the imaging device according to the first embodiment of the present invention is shown in the diagonal direction corresponding to the effective sensing area of ​​the electronic photosensitive element.

[0034] Figure 2 The diagram illustrates a cross-section of the imaging device according to the first embodiment of the present invention, in which the optical path is deflected by a reflecting prism and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element.

[0035] Figure 3 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment.

[0036] Figure 4 A schematic cross-sectional view of the imaging device according to the second embodiment of the present invention is shown in the diagonal direction corresponding to the effective sensing area of ​​the electronic photosensitive element.

[0037] Figure 5 The diagram illustrates a cross-section of the imaging device according to the second embodiment of the present invention, in which the optical path is deflected by a reflecting prism and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element.

[0038] Figure 6From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment.

[0039] Figure 7 A schematic cross-sectional view of the imaging device according to the third embodiment of the present invention is shown in the diagonal direction corresponding to the effective sensing area of ​​the electronic photosensitive element.

[0040] Figure 8 The diagram illustrates a cross-section of the imaging device according to the third embodiment of the present invention, in which the optical path is deflected by a reflecting prism and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element.

[0041] Figure 9 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment.

[0042] Figure 10 A schematic cross-sectional view of the imaging device according to the fourth embodiment of the present invention is shown in the diagonal direction corresponding to the effective sensing area of ​​the electronic photosensitive element.

[0043] Figure 11 The diagram illustrates a cross-section of the imaging device according to the fourth embodiment of the present invention, in which the optical path is deflected by a reflecting prism and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element.

[0044] Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment.

[0045] Figure 13 A schematic cross-sectional view of the imaging device according to the fifth embodiment of the present invention is shown in the diagonal direction corresponding to the effective sensing area of ​​the electronic photosensitive element.

[0046] Figure 14 The diagram illustrates a cross-section of the imaging device according to the fifth embodiment of the present invention, in which the optical path is deflected by a reflecting prism and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element.

[0047] Figure 15 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment.

[0048] Figure 16 A schematic cross-sectional view of the imaging device according to the sixth embodiment of the present invention is shown in the diagonal direction corresponding to the effective sensing area of ​​the electronic photosensitive element.

[0049] Figure 17 The diagram illustrates a cross-section of the imaging device according to the sixth embodiment of the present invention, in which the optical path is deflected by a reflecting prism and corresponds to the short side direction of the effective sensing area of ​​the electronic photosensitive element.

[0050] Figure 18From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the sixth embodiment.

[0051] Figure 19 A perspective schematic diagram of an imaging device according to a seventh embodiment of the present invention is shown.

[0052] Figure 20 A perspective view of one side of an electronic device according to an eighth embodiment of the present invention is shown.

[0053] Figure 21 Draw Figure 20 A three-dimensional diagram of the other side of the electronic device.

[0054] Figure 22 Draw Figure 20 System block diagram of an electronic device.

[0055] Figure 23 A schematic diagram of an imaging device according to a ninth embodiment of the present invention is shown.

[0056] Figure 24 A perspective view of one side of an electronic device according to a tenth embodiment of the present invention is shown.

[0057] Figure 25 A perspective view of one side of an electronic device according to the eleventh embodiment of the present invention is shown.

[0058] Figure 26 Draw Figure 25 A three-dimensional diagram of the other side of the electronic device.

[0059] Figure 27 A schematic diagram illustrating parameters Y11, Dr4r5, and the inflection point of a portion of the lens according to the first embodiment of the present invention is shown.

[0060] Figure 28 A schematic diagram illustrating the effective sensing area and parameter ImgH of an electronic photosensitive element according to an embodiment of the present invention is shown.

[0061] Figure 29 A schematic diagram of a single non-circular lens is shown in one embodiment of the present invention.

[0062] Icon labels:

[0063] 10, 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10i, 10j, 10k, 10m, 10n, 10p, 10q, 10r… Image capturing devices

[0064] 11… Imaging Lens

[0065] 12… Drive unit

[0066] 13…Electronic photosensitive element

[0067] 14…Image Stabilization Module

[0068] 20, 30, 40… electronic devices

[0069] 21, 31... Flash modules

[0070] 22…Focus Assist Module

[0071] 23…Image Signal Processor

[0072] 24, 44… display panels

[0073] 25… Image Software Processor

[0074] 26…Subject

[0075] P…inverted point

[0076] H…height of the imaging device

[0077] W… distance of the short side of the opening of the imaging device

[0078] SEA…Effective sensing area of ​​electronic photosensitive element

[0079] OA1…First Optical Axis

[0080] OA2…Second optical axis

[0081] 100, 200, 300, 400, 500, 600… Aperture

[0082] 101, 201, 301, 501, 601… aperture

[0083] 110, 210, 310, 410, 510, 610… First lens

[0084] 111, 211, 311, 411, 511, 611… Object side surface

[0085] 112, 212, 312, 412, 512, 612… like side surfaces

[0086] 120, 220, 320, 420, 520, 620… Second lens

[0087] 121, 221, 321, 421, 521, 621… Object side surface

[0088] 122, 222, 322, 422, 522, 622… like side surfaces

[0089] 130, 230, 330, 430, 530, 630… Third lens

[0090] 131, 231, 331, 431, 531, 631… Object side surface

[0091] 132, 232, 332, 432, 532, 632… like side surfaces

[0092] 140, 240, 340, 440, 540, 640… Fourth lens

[0093] 141, 241, 341, 441, 541, 641… Object side surface

[0094] 142, 242, 342, 442, 542, 642… Image side surface 150, 250, 350, 450, 550, 650… Fifth lens

[0095] 151, 251, 351, 451, 551, 651… Object side surface

[0096] 152, 252, 352, 452, 552, 652… like side surfaces

[0097] 160, 260, 360, 460, 560, 660… Sixth lens

[0098] 161, 261, 361, 461, 561, 661… Object side surface

[0099] 162, 262, 362, 462, 562, 662… like side surfaces

[0100] 170, 270, 370, 470, 570, 670… Prisms

[0101] 170”, 270”, 370”, 470”, 570”, 670”… reflecting prisms

[0102] 180, 280, 380, 480, 580, 680… filter elements

[0103] 190, 290, 390, 490, 590, 690… Imaging planes

[0104] 195, 295, 395, 495, 595, 695… Electronic photosensitive element

[0105] Dmin…the shortest distance from the center to the outer diameter of a non-circular lens.

[0106] Dmax…the longest distance from the center to the outer diameter of a non-circular lens.

[0107] Dr4r5… Distance on the optical axis from the image-side surface of the second lens to the object-side surface of the third lens

[0108] ImgH…Maximum imaging height of the optical lens group used for imaging

[0109] Y11…Maximum effective radius of the object-side surface of the first lens

[0110] X…X-axis direction

[0111] Y…Y axis direction

[0112] D… corresponds to the diagonal direction of the effective sensing area of ​​the electronic photosensitive element. Detailed Implementation

[0113] The imaging optical lens group comprises six lenses, which are arranged sequentially from the object side to the image side along the optical path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side.

[0114] The object-side surface of the first lens can be concave near the optical axis, and the image-side surface of the first lens can be convex near the optical axis. This allows for effective control of the effective radius of the light-gathering aperture of the imaging optical lens group, thereby reducing the opening of the image-capturing device and making it conform to product shape requirements.

[0115] The second lens can have positive refractive power; thereby, the imaging optical lens group can meet the miniaturization requirements. The object-side surface of the second lens can be concave near the optical axis, and the image-side surface of the second lens can be convex near the optical axis; thereby, the incident and exit angles of light from the second lens can be controlled to avoid total internal reflection due to excessive angles.

[0116] The third lens can have negative refractive power; thereby, chromatic aberration in the imaging optical lens group can be corrected. The image-side surface of the third lens can be concave near the optical axis; thereby, spherical aberration and coma in the imaging optical lens group can be balanced.

[0117] The fourth lens may have positive refractive power; thereby, it can balance the aberrations produced by the third lens to achieve a corrective effect. The image-side surface of the fourth lens may be convex near the optical axis; thereby, it can provide the fourth lens with the ability to converge light rays, thus achieving miniaturization.

[0118] The object-side surface of the fifth lens can be convex near the optical axis; this increases the symmetry of the imaging optical lens group, thereby improving image quality. The image-side surface of the fifth lens can be concave near the optical axis; this helps to shorten the back focal length of the imaging optical lens group and simultaneously corrects off-axis aberrations.

[0119] The object side surface of the sixth lens may be convex near the optical axis; thereby, the astigmatism of the imaging optical lens group can be corrected. The image side surface of the sixth lens may be concave near the optical axis; thereby, it is beneficial to shorten the back focal length to meet the requirement of miniaturization.

[0120] In the imaging optical lens group disclosed in the present invention, at least one lens may have at least one inflection point on at least one of its object side surface and image side surface; thereby, the distortion can be corrected to avoid peripheral image deformation. In some cases, the object side surface of the sixth lens may have at least one inflection point; thereby, the incident angle of light on the imaging surface can be controlled to maintain the brightness of the peripheral image. Among them, the image side surface of the sixth lens may be an aspherical surface and may have at least one inflection point; thereby, the correction of distortion can be enhanced. Please refer to Figure 27 , which shows a schematic diagram of the inflection points P of the first lens 110, the third lens 130, the fourth lens 140, the fifth lens 150, and the sixth lens 160 in the first embodiment of the present invention. Figure 27 The inflection points of the first lens, the third lens, the fourth lens, the fifth lens, and the sixth lens in the first embodiment are shown as an exemplary illustration. However, in each embodiment of the present invention, each lens may have one or more inflection points.

[0121] There may be an air gap on the optical axis between every two adjacent lenses among the first lens to the sixth lens of the imaging optical lens group, that is, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may be six single non-bonded lenses. Since the process of bonded lenses is more complex than that of non-bonded lenses, especially the bonded surface of two lenses needs to have a highly accurate curved surface to achieve a high degree of tightness when the two lenses are bonded. Moreover, during the bonding process, poor tightness may also be caused by misalignment, affecting the overall optical imaging quality. Therefore, in the imaging optical lens group of the present invention, there may be an air gap on the optical axis between any two adjacent lenses, which can ensure the simplicity of the assembly of the imaging optical lens group to increase the assembly qualification rate.

[0122] The distance from the object side surface of the first lens to the imaging surface on the optical axis is TL, and the focal length of the imaging optical lens group is f, which satisfies the following conditions: 0.70 < TL / f < 5.0. Thereby, the total length of the imaging optical lens group and the viewing angle can be balanced to meet more diverse application device specifications. Among them, the following conditions can also be satisfied: 1.0 < TL / f < 3.0. Among them, the following conditions can also be satisfied: 1.25 < TL / f < 2.60.

[0123] The distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis is Dr4r5, and the distance between the third lens and the fourth lens on the optical axis is T34, which can satisfy the following condition: 4.20 < Dr4r5 / T34. Thereby, sufficient space can be provided between the second lens and the third lens to place other optical elements, and thus more diverse application designs can be achieved. Among them, the following condition can also be satisfied: 6.0 < Dr4r5 / T34 < 20.0. Please refer to Figure 27 , which shows a schematic diagram of the parameter Dr4r5 in the first embodiment of the present invention.

[0124] The distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis is Dr4r5, and the sum of the lens thicknesses of each lens in the imaging optical lens group on the optical axis is ΣCT, which can satisfy the following condition: 0.30 < Dr4r5 / ΣCT < 2.50. Thereby, the ratio between the distance between the second lens and the third lens and the lens thickness can be balanced, and sufficient space can be provided at a specific position to mitigate the light path offset amount. Among them, the following condition can also be satisfied: 0.75 < Dr4r5 / ΣCT < 1.50.

[0125] The imaging optical lens group disclosed in the present invention further includes an aperture. The distance from the aperture to the imaging surface on the optical axis is SL, and the distance from the object-side surface of the first lens to the imaging surface on the optical axis is TL, which can satisfy the following condition: 0.80 < SL / TL < 2.0. Thereby, the aperture position can be controlled so that the imaging optical lens group has a smaller object-side end opening. Among them, the following condition can also be satisfied: 1.0 < SL / TL < 1.30.

[0126] The maximum effective radius of the object-side surface of the first lens is Y11, and the maximum imaging height of the imaging optical lens group is ImgH (i.e., half of the total length of the diagonal of the effective sensing area of the electronic photosensitive element), which can satisfy the following condition: 0.03 < Y11 / ImgH < 0.50. Thereby, it can be ensured that the imaging optical lens group still has sufficient area to receive light in the case of a small opening. Among them, the following condition can also be satisfied: 0.03 < Y11 / ImgH < 0.40. Please refer to Figure 27 and Figure 28 , where Figure 27 shows a schematic diagram of the parameter Y11 in the first embodiment of the present invention, and Figure 28 shows a schematic diagram of the effective sensing area SEA of the electronic photosensitive element and the parameter ImgH in an embodiment of the present invention. Figure 28 The effective sensing area SEA of the electronic photosensitive element in is a rectangle. The direction corresponding to the long side of the effective sensing area SEA is the X-axis direction, and the direction corresponding to the short side of the effective sensing area SEA is the Y-axis direction, where ImgH corresponds to the diagonal direction D of the effective sensing area SEA of the electronic photosensitive element.

[0127] Half of the maximum viewing angle in the optical lens group for imaging is HFOV, which satisfies the following condition: 27.0 [degrees] < HFOV < 60.0 [degrees]. Thereby, the optical lens group for imaging can capture the most commonly used image range to meet the needs of most products.

[0128] The Abbe number of the first lens is V1, which satisfies the following condition: 10.0 < V1 < 40.0. Thereby, the optical path control ability of the first lens can be improved, and at the same time, the design freedom can be increased to meet more stringent specification requirements. Among them, the following condition can also be satisfied: 12.0 < V1 < 30.0. Among them, the following condition can also be satisfied: 12.0 < V1 < 23.0.

[0129] The focal length of the optical lens group for imaging is f, and the focal length of the first lens is f1, which satisfies the following condition: -0.50 < f / f1 < 0.50. Thereby, the refractive power at the object side end of the optical lens group for imaging can be avoided from being too strong, and further, the need for a larger effective radius of the lens due to excessive optical path deflection can be avoided. Among them, the following condition can also be satisfied: -0.30 < f / f1 < 0.10.

[0130] The radius of curvature of the object side surface of the second lens is R3, and the radius of curvature of the image side surface of the second lens is R4, which satisfies the following condition: |R4 / R3| < 0.50. Thereby, the optical lens group on the image side surface of the second lens can have a strong optical path control ability to alleviate the refraction angle.

[0131] The radius of curvature of the object side surface of the fourth lens is R7, and the radius of curvature of the image side surface of the fourth lens is R8, which satisfies the following condition: 0.50 < (R7 + R8) / (R7 - R8) < 1.20. Thereby, the image side surface of the fourth lens can have a strong deflection ability to control the optical path direction.

[0132] The minimum Abbe number among all the lenses in the optical lens group for imaging is Vdmin, which satisfies the following condition: 12.0 < Vdmin < 20.0. Thereby, the focusing positions in different wavelength bands can be effectively corrected to avoid the occurrence of image overlap.

[0133] The maximum imaging height of the optical lens group for imaging is ImgH, and the focal length of the optical lens group for imaging is f, which satisfies the following condition: 0.53 < ImgH / f < 1.50. Thereby, the optical lens group for imaging can be adjusted to a better field angle, which is beneficial for applications in different fields.

[0134] The focal length of the optical lens group for imaging is f, and the focal length of the fourth lens is f4, which satisfies the following condition: 0.80 < f / f4 < 2.0. Thereby, the main converging ability can be provided to control the volume of the optical lens group for imaging.

[0135] The thickness of the first lens on the optical axis is CT1, and the thickness of the fourth lens on the optical axis is CT4, which can satisfy the following condition: 0.10 < CT1 / CT4 < 0.90. Thus, the ratio of the central thickness of the first lens and the fourth lens can be controlled to avoid the overall height of the imaging device being too high.

[0136] The axial distance between the third lens and the fourth lens is T34, and the axial distance between the fourth lens and the fifth lens is T45, which can satisfy the following condition: 2.0 < T34 / T45 < 40.0. Thus, the spatial configuration between the third lens and the fifth lens can be balanced to reduce the sensitivity of the imaging optical lens group. Among them, the following condition can also be satisfied: 2.30 < T34 / T45 < 25.0.

[0137] The radius of curvature of the image-side surface of the fourth lens is R8, and the radius of curvature of the object-side surface of the fifth lens is R9, which can satisfy the following condition: -1.0 < (R8 + R9) / (R8 - R9) < 0. Thus, the surface shapes between the fourth lens and the fifth lens can be effectively balanced, enabling the fourth lens to have a strong light path control ability and being corrected by the fifth lens.

[0138] The thickness of the first lens on the optical axis is CT1, and the thickness of the second lens on the optical axis is CT2, which can satisfy the following condition: CT1 / CT2 < 0.90. Thus, the ratio of the central thickness of the first lens and the second lens can be balanced to control the volume of the imaging optical lens group.

[0139] The maximum effective radius of the object-side surface of the first lens is Y11, and the radius of curvature of the object-side surface of the first lens is R1, which can satisfy the following condition: -0.70 < Y11 / R1 < 0. This is beneficial for reducing the aperture size of the imaging device while having a sufficient field angle.

[0140] The axial distance between the third lens and the fourth lens is T34, the axial distance between the fourth lens and the fifth lens is T45, and the axial distance between the fifth lens and the sixth lens is T56, which can satisfy the following condition: 0.80 < T34 / (T45 + T56) < 5.0. Thus, the distances between the lenses can be balanced to facilitate improving the assembly qualification rate of the imaging optical lens group.

[0141] The F-number of the imaging optical lens group is Fno, which can satisfy the following condition: 1.0 < Fno < 2.80. Thus, the incident light aperture can be effectively adjusted to ensure the incident light amount of the imaging optical lens group and improve the image brightness. Among them, the following condition can also be satisfied: 1.50 < Fno ≤ 2.50.

[0142] In the imaging optical lens group disclosed by the present invention, at least one reflection element, such as a prism or a mirror, etc., can be selectively arranged on the imaging optical path between the object to be photographed and the imaging surface, so as to provide a higher elastic spatial configuration for the imaging optical lens group, enabling the thinning of the electronic device not to be restricted by the total optical length of the imaging optical lens group. Among them, the reflection element can be arranged between the first lens and the sixth lens; thereby, different optical path directions can be provided for the imaging optical lens group, so as to use the lens space more elastically, and further meet more stringent specification requirements. Among them, the reflection element can be arranged between the second lens and the third lens. Among them, the reflection element can be a plastic prism with a refractive index of Nr, and it can meet the following conditions: 1.530 < Nr < 1.540; thereby, the cost can be controlled and the feasibility of mass production of the module can be improved. Please refer to Figure 2 , which shows a schematic diagram of a reflection element (reflection prism 170”) arranged between the second lens 120 and the third lens 130 to reflect the incident light and cause the optical path to turn at the position of the reflection element.

[0143] The imaging optical lens group can also be selectively configured with more than two reflection elements. The present invention is not limited to the types, quantities, optical path directions and positions of the reflection elements disclosed in the attached drawings.

[0144] In the imaging optical lens group disclosed by the present invention, the aperture can have a non-circular opening, which can be presented as a polygonal opening according to requirements. Thereby, the appearance of the module can be effectively controlled to facilitate the matching with other electronic modules.

[0145] The maximum refractive index of all the lenses in the imaging optical lens group is Nmax, and it can meet the following conditions: 1.64 < Nmax < 1.75. Thereby, sufficient optical path deflection ability can be provided for the lens, while controlling its manufacturing cost and stabilizing the qualified rate.

[0146] In the imaging optical lens group disclosed by the present invention, there can be at least one lens that is a non-circular lens. The shortest distance from the center to the outer diameter of the non-circular lens is Dmin, and the longest distance from the center to the outer diameter of the non-circular lens is Dmax, and it can meet the following conditions: Dmin / Dmax < 0.80. Thereby, the module space can be effectively saved to meet the market demand for miniaturization. Please refer to Figure 29 , which shows a schematic diagram of the structure and parameters Dmin and Dmax of a single non-circular lens in an embodiment according to the present invention.

[0147] The imaging device disclosed by the present invention includes the above-mentioned imaging optical lens group and an electronic photosensitive element, and the electronic photosensitive element is arranged on the imaging surface of the imaging optical lens group. Among them, the height H of the imaging device can be less than 8.0 mm. Thereby, it helps to control the thickness of the product to provide the convenience of portability. Please refer to Figure 23The diagram illustrates a height H of an imaging device according to a tenth embodiment of the present invention, in which the height H of the imaging device is arranged parallel to the first optical axis OA1.

[0148] The image-capturing device disclosed in this invention has an opening short-side distance W that can be less than 2.500 mm. This minimizes the impact on appearance while meeting specification requirements, thus satisfying market demands. The opening of the image-capturing device can be circular or non-circular. If the opening is circular, the short-side distance is the diameter of the circle; if the opening is rectangular, the short-side distance is the length of the short side of the rectangle; if the opening is of other shapes, the short-side distance is the length of the short side of the circumscribed rectangle of that shape. Please refer to... Figure 23 The diagram illustrates the distance W of the short side of the opening of an image-capturing device according to the tenth embodiment of the present invention.

[0149] The various technical features in the imaging optical lens group and image acquisition device of the present invention can be combined and configured to achieve corresponding effects.

[0150] In the imaging optical lens assembly disclosed in this invention, the lens material can be glass or plastic. If the lens is made of glass, the freedom of refractive power configuration of the imaging optical lens assembly can be increased, and the influence of external environmental temperature changes on imaging can be reduced. Glass lenses can be manufactured using techniques such as grinding or molding. If the lens material is plastic, production costs can be effectively reduced. Furthermore, spherical or aspherical (ASP) surfaces can be provided on the lens surface. Spherical lenses reduce manufacturing difficulty, while aspherical surfaces provide more controllable variables to reduce aberrations, decrease the number of lenses, and effectively reduce the overall length of the imaging optical lens assembly of this invention. Further, aspherical surfaces can be manufactured by plastic injection molding or molding glass lenses. In the imaging optical lens assembly disclosed in this invention, at least one lens can be made of plastic. This increases the freedom of lens design and improves the feasibility of mass production. The first lens can be made of plastic.

[0151] In the imaging optical lens group disclosed in this invention, if the lens surface is aspherical, it means that all or part of the optically effective area of ​​the lens surface is aspherical.

[0152] In the imaging optical lens assembly disclosed in this invention, additives can be selectively added to any (or more) lens materials to change the transmittance of the lens for specific wavelengths of light, thereby reducing stray light and color shift. For example, the additives may have the function of filtering out light in the 600 nm to 800 nm wavelength range in the system to help reduce excess red or infrared light; or they may filter out light in the 350 nm to 450 nm wavelength range to reduce excess blue or ultraviolet light. Therefore, the additives can prevent specific wavelengths of light from interfering with imaging. In addition, the additives can be uniformly mixed into plastic and manufactured into lenses using injection molding technology.

[0153] In the imaging optical lens assembly disclosed in this invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the convex surface can be located near the optical axis of the lens surface; if the lens surface is concave and the position of the concave surface is not defined, it means that the concave surface can be located near the optical axis of the lens surface. If the refractive power or focal length of the lens is not defined in its region, it means that the refractive power or focal length of the lens can be the refractive power or focal length of the lens near the optical axis.

[0154] In the imaging optical lens assembly disclosed in this invention, the inflection point of the lens surface refers to the boundary point where the curvature of the lens surface changes from positive to negative.

[0155] In the imaging optical lens group disclosed in this invention, the imaging surface of the imaging optical lens group can be a plane or a curved surface with any curvature, depending on the corresponding electronic photosensitive element, especially a curved surface with a concave surface facing the object side.

[0156] In the imaging optical lens assembly disclosed in this invention, one or more imaging correction elements (such as planar elements) can be selectively disposed between the lens closest to the imaging surface and the imaging surface in the imaging optical path to achieve the effect of correcting image curvature, etc. The optical properties of the imaging correction element, such as curvature, thickness, refractive index, position, and surface type (convex or concave, spherical or aspherical, diffractive surface, and Fresnel surface, etc.), can be adjusted according to the requirements of the imaging device. Generally, a preferred configuration of the imaging correction element is to place a thin plano-concave element with a concave surface in the object-side direction close to the imaging surface.

[0157] The imaging optical lens group disclosed in this invention may be provided with at least one aperture stop, which may be located in front of the first lens, between the lenses, or after the last lens. The aperture stop may be of the type such as a glare stop or a field stop, which can be used to reduce stray light and help improve image quality.

[0158] In the imaging optical lens assembly disclosed in this invention, the aperture can be configured as a front aperture or a central aperture. A front aperture means the aperture is positioned between the subject and the first lens, while a central aperture means the aperture is positioned between the first lens and the imaging plane. A front aperture allows for a longer distance between the exit pupil and the imaging plane, resulting in a telecentric effect and increasing the efficiency of image reception by the CCD or CMOS sensor. A central aperture helps to expand the field of view of the imaging optical lens assembly.

[0159] This invention may appropriately incorporate a variable aperture element, which can be a mechanical component or a light-regulating element, and whose aperture size and shape can be controlled electrically or by electrical signals. The mechanical component may include movable parts such as a blade assembly or a shielding plate; the light-regulating element may include a filter element, an electrochromic material, a liquid crystal layer, or other masking materials. This variable aperture element can enhance image adjustment capabilities by controlling the amount of light entering the image or the exposure time. Furthermore, this variable aperture element can also be the aperture of this invention, allowing image quality, such as depth of field or exposure speed, to be adjusted by changing the aperture value.

[0160] Based on the above implementation methods, specific embodiments are presented below and described in detail with reference to the accompanying drawings.

[0161] <First Embodiment>

[0162] Please refer to Figures 1 to 3 ,in Figure 1 A schematic cross-sectional view of the imaging device according to the first embodiment of the present invention is shown, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 2 The diagram illustrates a cross-section of the imaging device according to the first embodiment of the present invention, showing the optical path being deflected by a reflecting prism and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 3 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the first embodiment. Figure 1 It is known that the image-capturing device includes an imaging optical lens group (unlabeled) and an electronic photosensitive element 195. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 100, a first lens 110, a second lens 120, a prism 170, a third lens 130, a fourth lens 140, a fifth lens 150, an aperture stop 101, a sixth lens 160, a filter element 180, and an imaging surface 190. The electronic photosensitive element 195 is disposed on the imaging surface 190. The imaging optical lens group includes six single, non-bonded lenses (110, 120, 130, 140, 150, 160), and there are no other interposed lenses between each lens. Each pair of adjacent lenses has an air gap along the optical axis. Figure 1In this system, the optical path of the image-capturing device does not have a bend, but it is understandable that a reflecting prism can be used to bend the optical path. For example... Figure 2 As shown, a reflecting prism 170” is configured to reflect the incident light, causing the light path to bend at the position of the reflecting prism 170”.

[0163] The first lens 110 has negative refractive power and is made of plastic. Its object-side surface 111 is concave near the optical axis, and its image-side surface 112 is convex near the optical axis. Both of its surfaces are aspherical.

[0164] The second lens 120 has positive refractive power and is made of plastic. Its object-side surface 121 is concave near the optical axis, and its image-side surface 122 is convex near the optical axis. Both of its surfaces are aspherical.

[0165] The third lens 130 has negative refractive power and is made of plastic. Its object-side surface 131 is convex near the optical axis, and its image-side surface 132 is concave near the optical axis. Both of its surfaces are aspherical.

[0166] The fourth lens 140 has positive refractive power and is made of plastic. Its object-side surface 141 is concave near the optical axis, and its image-side surface 142 is convex near the optical axis. Both surfaces are aspherical, and its object-side surface 141 has at least one inflection point.

[0167] The fifth lens 150 has positive refractive power and is made of plastic. Its object-side surface 151 is convex near the optical axis, and its image-side surface 152 is concave near the optical axis. Both of its surfaces are aspherical.

[0168] The sixth lens 160 has negative refractive power and is made of plastic. Its object-side surface 161 is convex near the optical axis, and its image-side surface 162 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 161 has at least one inflection point, and its image-side surface 162 has at least one inflection point.

[0169] Prism 170 (reflecting prism 170") is made of glass and is positioned between the second lens 120 and the third lens 130, without affecting the focal length of the imaging optical lens group. Filter element 180 is also made of glass and is positioned between the sixth lens 160 and the imaging surface 190, without affecting the focal length of the imaging optical lens group.

[0170] In this embodiment, the maximum distance between the imaging position of the imaging optical lens group and the optical axis in the short side direction of the effective sensing area of ​​the electronic photosensitive element is 0.6 times the maximum imaging height of the imaging optical lens group.

[0171] In this embodiment, the third lens 130, the fourth lens 140, the fifth lens 150 and the sixth lens 160 are all non-circular lenses.

[0172] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0173]

[0174] X: The displacement parallel to the optical axis from the intersection of the aspherical surface and the optical axis to a point on the aspherical surface at a distance Y from the optical axis;

[0175] Y: The perpendicular distance between a point on the aspherical curve and the optical axis;

[0176] R: Radius of curvature;

[0177] k: cone coefficient; and

[0178] Ai: The i-th order aspherical coefficient.

[0179] In the imaging optical lens group of the first embodiment, the focal length of the imaging optical lens group is f, the aperture value of the imaging optical lens group is Fno, and half of the maximum field of view in the imaging optical lens group is HFOV, with the following values: f = 4.24 mm, Fno = 2.49, HFOV = 30.0 degrees.

[0180] The refractive index of prism 170 (reflecting prism 170”) is Nr, which satisfies the following condition: Nr = 1.517.

[0181] The maximum refractive index of all lenses in the imaging optical lens group is Nmax, which satisfies the following condition: Nmax = 1.669. In this embodiment, among the first lens 110 to the sixth lens 160, the refractive index of the first lens 110 and the third lens 130 is greater than the refractive index of the other lenses, therefore Nmax is equal to the refractive index of the first lens 110 and the third lens 130.

[0182] The minimum Abbe number among all lenses in the imaging optical lens group is Vdmin, which satisfies the following condition: Vdmin = 19.5. In this embodiment, among the first lens 110 to the sixth lens 160, the Abbe number of the first lens 110 and the third lens 130 is less than the Abbe number of the other lenses, therefore Vdmin is equal to the Abbe number of the first lens 110 and the third lens 130.

[0183] The Abbe number of the first lens 110 is V1, which satisfies the following condition: V1 = 19.45.

[0184] The thickness of the first lens 110 on the optical axis is CT1, and the thickness of the second lens 120 on the optical axis is CT2, which satisfies the following condition: CT1 / CT2=0.65.

[0185] The thickness of the first lens 110 on the optical axis is CT1, and the thickness of the fourth lens 140 on the optical axis is CT4, which satisfies the following condition: CT1 / CT4 = 0.47.

[0186] The distance on the optical axis from the image-side surface 122 of the second lens to the object-side surface 131 of the third lens is Dr4r5, and the distance on the optical axis between the third lens 130 and the fourth lens 140 is T34, which satisfies the following condition: Dr4r5 / T34 = 8.37. In this embodiment, the distance on the optical axis between two adjacent lenses refers to the distance on the optical axis between two adjacent mirror surfaces of two adjacent lenses.

[0187] The distance between the third lens 130 and the fourth lens 140 on the optical axis is T34, and the distance between the fourth lens 140 and the fifth lens 150 on the optical axis is T45, which satisfies the following condition: T34 / T45=3.74.

[0188] The distance on the optical axis from the image-side surface 122 of the second lens to the object-side surface 131 of the third lens is Dr4r5. The total thickness of all lenses in the imaging optical lens group on the optical axis is ΣCT, which satisfies the following condition: Dr4r5 / ΣCT=0.93. In this embodiment, ΣCT is the sum of the thicknesses on the optical axis 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.

[0189] The distance between the third lens 130 and the fourth lens 140 on the optical axis is T34, the distance between the fourth lens 140 and the fifth lens 150 on the optical axis is T45, and the distance between the fifth lens 150 and the sixth lens 160 on the optical axis is T56. They satisfy the following condition: T34 / (T45+T56)=1.06.

[0190] The radius of curvature of the object-side surface 121 of the second lens is R3, and the radius of curvature of the image-side surface 122 of the second lens is R4, which satisfies the following condition: |R4 / R3|=0.21.

[0191] The radius of curvature of the object-side surface 141 of the fourth lens is R7, and the radius of curvature of the image-side surface 142 of the fourth lens is R8, which satisfies the following condition: (R7+R8) / (R7-R8)=1.06.

[0192] The radius of curvature of the image-side surface 142 of the fourth lens is R8, and the radius of curvature of the object-side surface 151 of the fifth lens is R9, which satisfies the following condition: (R8+R9) / (R8-R9)=-0.65.

[0193] The focal length of the imaging optical lens group is f, and the focal length of the first lens 110 is f1, which satisfies the following condition: f / f1=-0.12.

[0194] The focal length of the imaging optical lens group is f, and the focal length of the fourth lens 140 is f4, which satisfies the following condition: f / f4=1.06.

[0195] The maximum effective radius of the object-side surface 111 of the first lens is Y11, and the radius of curvature of the object-side surface 111 of the first lens is R1, which satisfies the following condition: Y11 / R1=-0.39.

[0196] The maximum effective radius of the object-side surface 111 of the first lens is Y11, and the maximum imaging height of the imaging optical lens group is ImgH, which satisfies the following condition: Y11 / ImgH=0.37.

[0197] The maximum imaging height of the imaging optical lens group is ImgH, and the focal length of the imaging optical lens group is f, which satisfies the following condition: ImgH / f=0.54.

[0198] The distance from aperture 100 to imaging plane 190 on the optical axis is SL, and the distance from the object-side surface 111 of the first lens to imaging plane 190 on the optical axis is TL, which satisfies the following condition: SL / TL = 1.02.

[0199] The distance on the optical axis from the object-side surface 111 of the first lens to the imaging surface 190 is TL, and the focal length of the imaging optical lens group is f, which satisfies the following condition: TL / f = 1.99.

[0200] Please refer to Table 1 and Table 2 below.

[0201]

[0202]

[0203]

[0204] Table 1 is... Figure 1 The first embodiment provides detailed structural data, where the units for radius of curvature, thickness, and focal length are millimeters (mm), and surfaces 0 to 19 sequentially represent surfaces from the object side to the image side. Table 2 shows the aspherical data in the first embodiment, where k is the cone coefficient in the aspherical curve equation, and A4 to A16 represent the 4th to 16th order aspherical coefficients of each surface. Furthermore, the tables for the following embodiments are corresponding schematic diagrams and aberration curves for each embodiment. The definitions of the data in the tables are the same as those in Tables 1 and 2 of the first embodiment, and will not be repeated here.

[0205] <Second Embodiment>

[0206] Please refer to Figures 4 to 6 ,in Figure 4A schematic cross-sectional view of the imaging device according to the second embodiment of the present invention is shown, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 5 The diagram illustrates a cross-section of the imaging device according to a second embodiment of the present invention, showing the optical path being deflected by a reflecting prism and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 6 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the second embodiment. Figure 4 It is known that the image-capturing device includes an imaging optical lens group (unlabeled) and an electronic photosensitive element 295. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 200, a first lens 210, a second lens 220, a prism 270, a third lens 230, a fourth lens 240, an aperture stop 201, a fifth lens 250, a sixth lens 260, a filter element 280, and an imaging surface 290. The electronic photosensitive element 295 is disposed on the imaging surface 290. The imaging optical lens group includes six single, non-bonded lenses (210, 220, 230, 240, 250, 260), and there are no other interposed lenses between each lens. Each pair of adjacent lenses has an air gap along the optical axis. Figure 4 In this system, the optical path of the image-capturing device does not have a bend, but it is understandable that a reflecting prism can be used to bend the optical path. For example... Figure 5 As shown, a reflecting prism 270” is configured to reflect the incident light, causing the light path to bend at the position of the reflecting prism 270”.

[0207] The first lens 210 has negative refractive power and is made of plastic. Its object-side surface 211 is concave near the optical axis, and its image-side surface 212 is convex near the optical axis. Both of its surfaces are aspherical.

[0208] The second lens 220 has positive refractive power and is made of plastic. Its object-side surface 221 is concave near the optical axis, and its image-side surface 222 is convex near the optical axis. Both of its surfaces are aspherical.

[0209] The third lens 230 has negative refractive power and is made of plastic. Its object-side surface 231 is concave near the optical axis, and its image-side surface 232 is concave near the optical axis. Both of its surfaces are aspherical, and its object-side surface 231 has at least one inflection point.

[0210] The fourth lens 240 has positive refractive power and is made of plastic. Its object-side surface 241 is convex near the optical axis, and its image-side surface 242 is convex near the optical axis. Both of its surfaces are aspherical.

[0211] The fifth lens 250 has positive refractive power and is made of plastic. Its object-side surface 251 is convex near the optical axis, and its image-side surface 252 is concave near the optical axis. Both of its surfaces are aspherical.

[0212] The sixth lens 260 has negative refractive power and is made of plastic. Its object-side surface 261 is convex near the optical axis, and its image-side surface 262 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 261 has at least one inflection point, and its image-side surface 262 has at least one inflection point.

[0213] The prism 270 (reflecting prism 270”) is made of glass and is positioned between the second lens 220 and the third lens 230, without affecting the focal length of the imaging optical lens group. The filter element 280 is made of glass and is positioned between the sixth lens 260 and the imaging surface 290, without affecting the focal length of the imaging optical lens group.

[0214] In this embodiment, the maximum distance between the imaging position of the imaging optical lens group and the optical axis in the short side direction of the effective sensing area of ​​the electronic photosensitive element is 0.6 times the maximum imaging height of the imaging optical lens group.

[0215] In this embodiment, the third lens 230, the fourth lens 240, the fifth lens 250 and the sixth lens 260 are all non-circular lenses.

[0216] Please refer to Table 3 and Table 4 below.

[0217]

[0218]

[0219]

[0220] In the second embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0221]

[0222] <Third Embodiment>

[0223] Please refer to Figures 7 to 9 ,in Figure 7 A schematic cross-sectional view of the imaging device according to the third embodiment of the present invention is shown, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 8 The diagram illustrates a cross-section of the imaging device according to a third embodiment of the present invention, showing the optical path being deflected by a reflecting prism and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 9 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the third embodiment. Figure 7It is known that the image-capturing device includes an imaging optical lens group (unlabeled) and an electronic photosensitive element 395. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 300, a first lens 310, a second lens 320, a prism 370, a third lens 330, a fourth lens 340, an aperture stop 301, a fifth lens 350, a sixth lens 360, a filter element 380, and an imaging surface 390. The electronic photosensitive element 395 is disposed on the imaging surface 390. The imaging optical lens group includes six single, non-bonded lenses (310, 320, 330, 340, 350, 360), and there are no other interposed lenses between each lens. Each pair of adjacent lenses has an air gap along the optical axis. Figure 7 In this system, the optical path of the image-capturing device does not have a bend, but it is understandable that a reflecting prism can be used to bend the optical path. For example... Figure 8 As shown, a reflecting prism 370” is configured to reflect the incident light, causing the light path to bend at the position of the reflecting prism 370”.

[0224] The first lens 310 has negative refractive power and is made of plastic. Its object-side surface 311 is concave near the optical axis, and its image-side surface 312 is convex near the optical axis. Both of its surfaces are aspherical.

[0225] The second lens 320 has positive refractive power and is made of plastic. Its object-side surface 321 is concave near the optical axis, and its image-side surface 322 is convex near the optical axis. Both of its surfaces are aspherical.

[0226] The third lens 330 has negative refractive power and is made of plastic. Its object-side surface 331 is concave near the optical axis, and its image-side surface 332 is concave near the optical axis. Both of its surfaces are aspherical, and its object-side surface 331 has at least one inflection point.

[0227] The fourth lens 340 has positive refractive power and is made of plastic. Its object-side surface 341 is convex near the optical axis, and its image-side surface 342 is convex near the optical axis. Both of its surfaces are aspherical.

[0228] The fifth lens 350 has negative refractive power and is made of plastic. Its object-side surface 351 is convex near the optical axis, and its image-side surface 352 is concave near the optical axis. Both of its surfaces are aspherical.

[0229] The sixth lens 360 has negative refractive power and is made of plastic. Its object-side surface 361 is convex near the optical axis, and its image-side surface 362 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 361 has at least one inflection point, and its image-side surface 362 has at least one inflection point.

[0230] The prism 370 (reflecting prism 370”) is made of glass and is positioned between the second lens 320 and the third lens 330, without affecting the focal length of the imaging optical lens group. The filter element 380 is made of glass and is positioned between the sixth lens 360 and the imaging surface 390, without affecting the focal length of the imaging optical lens group.

[0231] In this embodiment, the maximum distance between the imaging position of the imaging optical lens group and the optical axis in the short side direction of the effective sensing area of ​​the electronic photosensitive element is 0.6 times the maximum imaging height of the imaging optical lens group.

[0232] In this embodiment, the third lens 330, the fourth lens 340, the fifth lens 350 and the sixth lens 360 are all non-circular lenses.

[0233] Please refer to Table 5 and Table 6 below.

[0234]

[0235]

[0236]

[0237] In the third embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0238]

[0239]

[0240] <Fourth Embodiment>

[0241] Please refer to Figures 10 to 12 ,in Figure 10 A schematic cross-sectional view of the imaging device according to the fourth embodiment of the present invention is shown, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 11 The diagram illustrates a cross-section of the imaging device according to the fourth embodiment of the present invention, showing the optical path being deflected by a reflecting prism and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 12 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fourth embodiment. Figure 10It is known that the image-capturing device includes an imaging optical lens group (unlabeled) and an electronic photosensitive element 495. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 400, a first lens 410, a second lens 420, a prism 470, a third lens 430, a fourth lens 440, a fifth lens 450, a sixth lens 460, a filter element 480, and an imaging surface 490. The electronic photosensitive element 495 is disposed on the imaging surface 490. The imaging optical lens group comprises six single, non-bonded lenses (410, 420, 430, 440, 450, 460), and there are no other interposed lenses between them. Each pair of adjacent lenses has an air gap along the optical axis. Figure 10 In this system, the optical path of the image-capturing device does not have a bend, but it is understandable that a reflecting prism can be used to bend the optical path. For example... Figure 11 As shown, a reflecting prism 470” is configured to reflect the incident light, causing the light path to bend at the position of the reflecting prism 470”.

[0242] The first lens 410 has negative refractive power and is made of plastic. Its object-side surface 411 is concave near the optical axis, and its image-side surface 412 is convex near the optical axis. Both of its surfaces are aspherical.

[0243] The second lens 420 has positive refractive power and is made of plastic. Its object-side surface 421 is concave near the optical axis, and its image-side surface 422 is convex near the optical axis. Both of its surfaces are aspherical.

[0244] The third lens 430 has negative refractive power and is made of plastic. Its object-side surface 431 is concave near the optical axis, and its image-side surface 432 is concave near the optical axis. Both surfaces are aspherical, and its object-side surface 431 has at least one inflection point.

[0245] The fourth lens 440 has positive refractive power and is made of plastic. Its object-side surface 441 is convex near the optical axis, and its image-side surface 442 is convex near the optical axis. Both of its surfaces are aspherical.

[0246] The fifth lens 450 has negative refractive power and is made of plastic. Its object-side surface 451 is convex near the optical axis, and its image-side surface 452 is concave near the optical axis. Both of its surfaces are aspherical.

[0247] The sixth lens 460 has positive refractive power and is made of plastic. Its object-side surface 461 is convex near the optical axis, and its image-side surface 462 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 461 has at least one inflection point, and its image-side surface 462 has at least one inflection point.

[0248] Prism 470 (reflecting prism 470") is made of glass and is positioned between the second lens 420 and the third lens 430, without affecting the focal length of the imaging optical lens group. Filter element 480 is made of glass and is positioned between the sixth lens 460 and the imaging surface 490, without affecting the focal length of the imaging optical lens group.

[0249] In this embodiment, the maximum distance between the imaging position of the imaging optical lens group and the optical axis in the short side direction of the effective sensing area of ​​the electronic photosensitive element is 0.6 times the maximum imaging height of the imaging optical lens group.

[0250] In this embodiment, the third lens 430, the fourth lens 440, the fifth lens 450 and the sixth lens 460 are all non-circular lenses.

[0251] Please refer to Tables 7 and 8 below.

[0252]

[0253]

[0254]

[0255] In the fourth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0256]

[0257] <Fifth Embodiment>

[0258] Please refer to Figures 13 to 15 ,in Figure 13 A schematic cross-sectional view of the imaging device according to the fifth embodiment of the present invention is shown, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 14 The diagram illustrates a cross-section of the imaging device according to the fifth embodiment of the present invention, showing the optical path being deflected by a reflecting prism and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 15 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment. Figure 13It is known that the image-capturing device includes an imaging optical lens group (unlabeled) and an electronic photosensitive element 595. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 500, a first lens 510, a second lens 520, a prism 570, a third lens 530, a fourth lens 540, an aperture stop 501, a fifth lens 550, a sixth lens 560, a filter element 580, and an imaging surface 590. The electronic photosensitive element 595 is disposed on the imaging surface 590. The imaging optical lens group includes six single, non-bonded lenses (510, 520, 530, 540, 550, 560), and there are no other interposed lenses between each lens. Each pair of adjacent lenses has an air gap along the optical axis. Figure 13 In this system, the optical path of the image-capturing device does not have a bend, but it is understandable that a reflecting prism can be used to bend the optical path. For example... Figure 14 As shown, a reflecting prism 570” is configured to reflect the incident light, causing the light path to bend at the position of the reflecting prism 570”.

[0259] The first lens 510 has negative refractive power and is made of plastic. Its object-side surface 511 is concave near the optical axis, and its image-side surface 512 is convex near the optical axis. Both of its surfaces are aspherical.

[0260] The second lens 520 has positive refractive power and is made of plastic. Its object-side surface 521 is concave near the optical axis, and its image-side surface 522 is convex near the optical axis. Both of its surfaces are aspherical.

[0261] The third lens 530 has negative refractive power and is made of plastic. Its object-side surface 531 is convex near the optical axis, and its image-side surface 532 is concave near the optical axis. Both of its surfaces are aspherical.

[0262] The fourth lens 540 has positive refractive power and is made of plastic. Its object-side surface 541 is concave near the optical axis, and its image-side surface 542 is convex near the optical axis. Both surfaces are aspherical, and its object-side surface 541 has at least one inflection point.

[0263] The fifth lens 550 has positive refractive power and is made of plastic. Its object-side surface 551 is convex near the optical axis, and its image-side surface 552 is concave near the optical axis. Both of its surfaces are aspherical.

[0264] The sixth lens 560 has negative refractive power and is made of plastic. Its object-side surface 561 is convex near the optical axis, and its image-side surface 562 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 561 has at least one inflection point, and its image-side surface 562 has at least one inflection point.

[0265] Prism 570 (reflecting prism 270”) is made of glass and is positioned between the second lens 520 and the third lens 530, without affecting the focal length of the imaging optical lens group. Filter element 580 is also made of glass and is positioned between the sixth lens 560 and the imaging surface 590, without affecting the focal length of the imaging optical lens group.

[0266] In this embodiment, the maximum distance between the imaging position of the imaging optical lens group and the optical axis in the short side direction of the effective sensing area of ​​the electronic photosensitive element is 0.6 times the maximum imaging height of the imaging optical lens group.

[0267] In this embodiment, the fourth lens 540, the fifth lens 550, and the sixth lens 560 are all non-circular lenses.

[0268] Please refer to Tables 9 and 10 below.

[0269]

[0270]

[0271]

[0272] In the fifth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0273]

[0274] <Sixth Embodiment>

[0275] Please refer to Figures 16 to 18 ,in Figure 16 A schematic cross-sectional view of the imaging device according to the sixth embodiment of the present invention is shown, corresponding to the effective sensing area of ​​the electronic photosensitive element along the diagonal direction. Figure 17 The diagram illustrates a cross-section of the imaging device according to the sixth embodiment of the present invention, showing the optical path being deflected by a reflecting prism and corresponding to the short side direction of the effective sensing area of ​​the electronic photosensitive element. Figure 18 From left to right, the graphs show the spherical aberration, astigmatism, and distortion curves of the fifth embodiment. Figure 16It is known that the image-capturing device includes an imaging optical lens group (unlabeled) and an electronic photosensitive element 695. The imaging optical lens group, arranged sequentially from the object side to the image side along the optical path, includes an aperture 600, a first lens 610, a second lens 620, a prism 670, a third lens 630, a fourth lens 640, an aperture stop 601, a fifth lens 650, a sixth lens 660, a filter element 680, and an imaging surface 690. The electronic photosensitive element 695 is disposed on the imaging surface 690. The imaging optical lens group includes six single, non-bonded lenses (610, 620, 630, 640, 650, 660), and there are no other interposed lenses between each lens. Each pair of adjacent lenses has an air gap along the optical axis. Figure 16 In this system, the optical path of the image-capturing device does not have a bend, but it is understandable that a reflecting prism can be used to bend the optical path. For example... Figure 17 As shown, a reflecting prism 670” is configured to reflect the incident light, causing the light path to bend at the position of the reflecting prism 670”.

[0276] The first lens 610 has positive refractive power and is made of plastic. Its object-side surface 611 is concave near the optical axis, and its image-side surface 612 is convex near the optical axis. Both of its surfaces are aspherical.

[0277] The second lens 620 has positive refractive power and is made of plastic. Its object-side surface 621 is concave near the optical axis, and its image-side surface 622 is convex near the optical axis. Both of its surfaces are aspherical.

[0278] The third lens 630 has negative refractive power and is made of plastic. Its object-side surface 631 is concave near the optical axis, and its image-side surface 632 is concave near the optical axis. Both of its surfaces are aspherical, and its object-side surface 631 has at least one inflection point.

[0279] The fourth lens 640 has positive refractive power and is made of plastic. Its object-side surface 641 is convex near the optical axis, and its image-side surface 642 is convex near the optical axis. Both of its surfaces are aspherical.

[0280] The fifth lens 650 has positive refractive power and is made of plastic. Its object-side surface 651 is convex near the optical axis, and its image-side surface 652 is concave near the optical axis. Both of its surfaces are aspherical.

[0281] The sixth lens 660 has negative refractive power and is made of plastic. Its object-side surface 661 is convex near the optical axis, and its image-side surface 662 is concave near the optical axis. Both surfaces are aspherical. Its object-side surface 661 has at least one inflection point, and its image-side surface 662 has at least one inflection point.

[0282] The prism 670 (reflecting prism 670”) is made of plastic and is positioned between the second lens 620 and the third lens 630, without affecting the focal length of the imaging optical lens group. The filter element 680 is made of glass and is positioned between the sixth lens 660 and the imaging surface 690, without affecting the focal length of the imaging optical lens group.

[0283] In this embodiment, the maximum distance between the imaging position of the imaging optical lens group and the optical axis in the short side direction of the effective sensing area of ​​the electronic photosensitive element is 0.6 times the maximum imaging height of the imaging optical lens group.

[0284] In this embodiment, the third lens 630, the fourth lens 640, the fifth lens 650 and the sixth lens 660 are all non-circular lenses.

[0285] Please refer to Table 11 and Table 12 below.

[0286]

[0287]

[0288]

[0289] In the sixth embodiment, the equation for the aspherical curve is expressed as in the first embodiment. Furthermore, the definitions in the table below are the same as in the first embodiment and will not be repeated here.

[0290]

[0291] <Seventh Embodiment>

[0292] Please refer to Figure 19 This diagram illustrates a perspective view of an image-capturing device according to a seventh embodiment of the present invention. In this embodiment, the image-capturing device 10 is a camera module. The image-capturing device 10 includes an imaging lens 11, a driving device 12, an electronic photosensitive element 13, and an image stabilization module 14. The imaging lens 11 includes the imaging optical lens group of the first embodiment described above, a lens barrel (not otherwise labeled) for carrying the imaging optical lens group, and a support device (Holder Member, not otherwise labeled). The imaging lens 11 can also be configured with imaging optical lens groups of other embodiments, and the present invention is not limited thereto. The image-capturing device 10 uses the imaging lens 11 to focus light to generate an image, and cooperates with the driving device 12 to focus the image, finally imaging it on the electronic photosensitive element 13 and outputting it as image data.

[0293] The driving device 12 may have an auto-focus function, and its driving method can use a driving system such as a voice coil motor (VCM), microelectromechanical systems (MEMS), piezoelectric systems, and shape memory alloys. The driving device 12 enables the imaging lens 11 to achieve a better imaging position, allowing clear images to be captured even when the subject is at different object distances. In addition, the image capturing device 10 is equipped with a high-sensitivity and low-noise electronic image sensor 13 (such as CMOS or CCD) located on the imaging surface of the imaging optical lens group, which can truly present the good imaging quality of the imaging optical lens group.

[0294] The image stabilization module 14 can be, for example, an accelerometer, a gyroscope, or a Hall effect sensor. The drive unit 12 can work in conjunction with the image stabilization module 14 to form an optical image stabilization (OIS) device. By adjusting the changes in different axes of the imaging lens 11, it can compensate for the blurry image caused by shaking during shooting, or use image compensation technology in the image software to provide electronic image stabilization (EIS) function, further improving the image quality of shooting in dynamic and low-light scenes.

[0295] <Eighth Embodiment>

[0296] Please refer to Figures 20 to 22 ,in Figure 20 A perspective view of one side of an electronic device according to an eighth embodiment of the present invention is shown. Figure 21 Draw Figure 20 A three-dimensional schematic diagram of the other side of the electronic device, and Figure 22 Draw Figure 20 System block diagram of an electronic device.

[0297] In this embodiment, the electronic device 20 is a smartphone. The electronic device 20 includes the image capturing device 10, image capturing device 10a, image capturing device 10b, image capturing device 10c, image capturing device 10d, flash module 21, focus assist module 22, image signal processor 23, display panel 24, and image software processor 25 described in the seventh embodiment above. Image capturing devices 10 and 10a are both located on the same side of the electronic device 20 and are both single-focus. Image capturing devices 10b, 10c, 10d, and the display panel 24 are all located on the other side of the electronic device 20, so that image capturing devices 10b, 10c, and 10d can function as front-facing cameras for selfies, but this invention is not limited thereto. Furthermore, image capturing devices 10a, 10b, 10c, and 10d all have a similar structural configuration to image capturing device 10. In detail, each of the image capturing devices 10a, 10b, 10c, and 10d includes an imaging lens, a driving device, an electronic photosensitive element, and an image stabilization module. Each imaging lens of image capturing devices 10a, 10b, 10c, and 10d includes an optical lens group, a lens barrel for supporting the optical lens group, and a support device.

[0298] Image capturing device 10 is a telephoto image capturing device, image capturing device 10a is a wide-angle image capturing device, image capturing device 10b is a wide-angle image capturing device, image capturing device 10c is an ultra-wide-angle image capturing device, and image capturing device 10d is a Time-of-Flight (ToF) image capturing device. In this embodiment, image capturing devices 10 and 10a have different viewing angles, allowing the electronic device 20 to acquire images of different ranges and levels of detail to meet various shooting scenarios. Furthermore, image capturing device 10d can acquire depth information of the image. The above-described electronic device 20 is exemplified by including multiple image capturing devices 10, 10a, 10b, 10c, and 10d, but the number and configuration of the image capturing devices are not intended to limit the invention.

[0299] When the user photographs the subject 26, the electronic device 20 uses the image capturing device 10 or image capturing device 10a to focus the light, activates the flash module 21 for supplemental lighting, and uses the subject distance information of the subject 26 provided by the focus assist module 22 for fast focusing. In addition, the image signal processor 23 performs image optimization processing to further improve the image quality produced by the imaging optical lens group. The focus assist module 22 can use an infrared or laser focus assist system to achieve fast focusing. Furthermore, the electronic device 20 can also use the image capturing devices 10b, 10c, or 10d for shooting. The display panel 24 can use a touch screen or a physical shooting button, combined with the diverse functions of the image software processor 25 for image capturing and image processing. The image processed by the image software processor 25 can be displayed on the display panel 24.

[0300] <Ninth Embodiment>

[0301] Please refer to Figure 23 The diagram illustrates an image-capturing device according to a ninth embodiment of the present invention. In this embodiment, the image-capturing device 10e is a camera module, comprising an imaging optical lens group having a non-circular lens and a reflecting prism 170” as described in the first embodiment. The imaging optical lens group has a first optical axis OA1, a reflecting prism 170”, and a second optical axis OA2 sequentially along the optical path from the subject (not shown) to the imaging surface 190, wherein the height H direction of the image-capturing device 10e is parallel to the first optical axis OA1.

[0302] In this embodiment, the height H of the imaging device 10e is 6.25 mm, and the distance W of the short side of the opening of the imaging device 10e is 1.700 mm. This helps to control the thickness of the product to meet the convenience of portability. In addition, while meeting the requirements of specifications, the impact on appearance can be minimized to meet market demands.

[0303] <Tenth Embodiment>

[0304] Please refer to Figure 24 The diagram shows a perspective view of one side of an electronic device according to the tenth embodiment of the present invention.

[0305] In this embodiment, the electronic device 30 is a smartphone. The electronic device 30 includes the image capturing devices 10e, 10f, 10g, 10h, 10i, 10j, 10k, 10m, and 10n described in the ninth embodiment above, a flash module 31, a focus assist module, an image signal processor, a display panel, and an image software processor (not shown). Image capturing devices 10e, 10f, 10g, 10h, 10i, 10j, 10k, 10m, and 10n are all located on the same side of the electronic device 30, while the display panel is located on the other side of the electronic device 30. Furthermore, the imaging devices 10e, 10f, 10g, 10h, 10i, 10j, 10k, 10m, and 10n all have a similar structural configuration to the imaging device 10, which will not be described in detail here.

[0306] Image capturing device 10e is a telescopic image capturing device with a reflective element (reflective prism 170”), image capturing device 10f is a telescopic image capturing device with a reflective element, image capturing device 10g is a telescopic image capturing device, image capturing device 10h is a telescopic image capturing device, image capturing device 10i is a wide-angle image capturing device, image capturing device 10j is a wide-angle image capturing device, image capturing device 10k is an ultra-wide-angle image capturing device, image capturing device 10m is an ultra-wide-angle image capturing device, and image capturing device 10n is a time-of-flight ranging image capturing device. In this embodiment, image capturing devices 10e, 10f, 10g, 10h, 10i, 10j, 10k, and 10m have different viewing angles, allowing the electronic device 30 to provide different magnifications to achieve optical zoom shooting effects. Among them, image capturing device 1... The reflective elements of image capturing devices 10e and 10f are configured to adjust the optical axis direction, so that the total length of image capturing devices 10e and 10f is not limited by the thickness of electronic device 30. Additionally, image capturing device 10n can acquire depth information of the image. The electronic device 30 described above is exemplified by including multiple image capturing devices 10e, 10f, 10g, 10h, 10i, 10j, 10k, 10m, and 10n, but the number and configuration of the image capturing devices are not intended to limit the invention. When a user photographs a subject, electronic device 30 uses image capturing devices 10e, 10f, 10g, 10h, 10i, 10j, 10k, 10m, and 10n to focus light and capture an image, activates the flash module 31 for supplemental lighting, and performs subsequent processing in a manner similar to the aforementioned embodiments, which will not be described in detail here.

[0307] <Eleventh Embodiment>

[0308] Please refer to Figure 25 and Figure 26 ,in Figure 25 A perspective view of one side of an electronic device according to the eleventh embodiment of the present invention is shown, and Figure 26 Draw Figure 25 A three-dimensional diagram of the other side of the electronic device.

[0309] In this embodiment, the electronic device 40 is a smartphone. The electronic device 40 includes the image capturing devices 10e, 10p, 10q, and 10r described in the ninth embodiment above, as well as a display panel 44. The image capturing devices 10e and 44 are both located on the same side of the electronic device 40, allowing the user to simultaneously view the captured image in their direction during photography. Furthermore, the opening of the image capturing device 10e is non-circular, effectively controlling the module's appearance and facilitating compatibility with other electronic modules. The image capturing devices 10p, 10q, and 10r are all located on the other side of the electronic device 40. Image capturing device 10p is an ultra-wide-angle image capturing device, image capturing device 10q is a wide-angle image capturing device, and image capturing device 10r is a telephoto image capturing device. In this embodiment, the image capturing devices 10p, 10q, and 10r have different viewing angles, enabling the electronic device 40 to provide different magnifications to achieve optical zoom shooting effects. The electronic device 40 described above includes a plurality of image capturing devices 10e, 10p, 10q, and 10r, but the number and configuration of the image capturing devices are not intended to limit the present invention.

[0310] The image capturing devices 10 and 10e of the present invention are not limited to application in smartphones. They can also be applied to mobile focusing systems as needed, and feature excellent aberration correction and good image quality. For example, the image capturing devices 10 and 10e can be widely used in electronic devices such as three-dimensional (3D) image capture, digital cameras, mobile devices, tablet computers, smart TVs, network monitoring equipment, dashcams, reversing cameras, multi-lens devices, recognition systems, motion-sensing game consoles, and wearable devices. The aforementioned electronic devices are merely illustrative examples of practical applications of the present invention and do not limit the scope of application of the image capturing devices of the present invention.

[0311] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. An optical lens assembly for imaging, characterized in that, It includes six lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side. The first lens has a concave object-side surface near the optical axis and a convex image-side surface near the optical axis. The second lens has positive refractive power, the third lens has negative refractive power, and the image-side surface of the third lens is concave near the optical axis. The fourth lens has positive refractive power, the sixth lens has a convex object-side surface near the optical axis and a concave image-side surface near the optical axis. The image-side surface of the sixth lens is aspherical and has at least one inflection point. The imaging optical lens group comprises six lenses in total. The distance from the object-side surface of the first lens to an imaging plane on the optical axis is TL. The focal length of the imaging optical lens group is f. The distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis is Dr4r5. The optical axis spacing between the third lens and the fourth lens is T34. The following conditions are satisfied: 0.70 < TL / f < 5.0; and 4.20 < Dr4r5 / T34 < 20.

0.

2. The imaging optical lens assembly according to claim 1, characterized in that, The object-side surface of the second lens is concave near the optical axis, and the image-side surface of the second lens is convex near the optical axis.

3. The imaging optical lens assembly according to claim 1, characterized in that, The object-side surface of the fifth lens is convex near the optical axis.

4. The imaging optical lens assembly according to claim 1, characterized in that, The distance from the object-side surface of the first lens to the imaging plane along the optical axis is TL, the focal length of the imaging optical lens group is f, and the Abbe number of the first lens is V1, which satisfies the following conditions: 1.0 < TL / f < 3.0; and 12.0 < V1 < 23.0。 5. The imaging optical lens assembly according to claim 1, characterized in that, The Abbe number of the first lens is V1, which satisfies the following condition: 10.0 < V1 < 40.0。 6. The imaging optical lens assembly according to claim 1, characterized in that, The focal length of the imaging optical lens group is f, and the focal length of the first lens is f1, which satisfies the following conditions: -0.50 < f / f1 < 0.

50.

7. The imaging optical lens assembly according to claim 1, characterized in that, It also includes a reflective element disposed between the second lens and the third lens, wherein the distance on the optical axis from the image-side surface of the second lens to the object-side surface of the third lens is Dr4r5, and the optical axis spacing between the third lens and the fourth lens is T34, which satisfies the following conditions: 6.0 < Dr4r5 / T34 < 20.

0.

8. The imaging optical lens assembly according to claim 1, characterized in that, The second lens has an object-side surface radius of curvature of R3, an image-side surface radius of curvature of R4, an object-side surface radius of curvature of R7, and an image-side surface radius of curvature of R8, satisfying the following conditions: |R4 / R3| < 0.50; and 0.50 < (R7+R8) / (R7-R8) < 1.

20.

9. An optical lens assembly for imaging, characterized in that, It includes six lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side. The object-side surface of the first lens is concave near the optical axis, the second lens has positive refractive power, the third lens has negative refractive power, the fourth lens has positive refractive power, the image-side surface of the fifth lens is concave near the optical axis, the image-side surface of the sixth lens is concave near the optical axis, the image-side surface of the sixth lens is aspherical, and the image-side surface of the sixth lens has at least one inflection point. The imaging optical lens group comprises six lenses and includes an aperture. The distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL. The focal length of the imaging optical lens group is f. The distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis is Dr4r5. The total lens thickness of all lenses in the imaging optical lens group on the optical axis is ΣCT. The distance from the aperture to the imaging plane on the optical axis is SL. It satisfies the following conditions: 0.70 < TL / f < 5.0; 0.30 < Dr4r5 / ΣCT < 2.50; and 0.80 < SL / TL < 2.

0.

10. The imaging optical lens assembly according to claim 9, characterized in that, The image-side surface of the fourth lens is convex near the optical axis.

11. The imaging optical lens assembly according to claim 9, characterized in that, The distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, the focal length of the imaging optical lens group is f, the distance from the image-side surface of the second lens to the object-side surface of the third lens on the optical axis is Dr4r5, the distance between the third lens and the fourth lens on the optical axis is T34, the sum of the lens thicknesses on the optical axis of all lenses in the imaging optical lens group is ΣCT, the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, and they satisfy the following conditions: 1.97 ≤ TL / f ≤ 2.39; 8.37 ≤ Dr4r5 / T34 ≤ 12.69; 0.75 < Dr4r5 / ΣCT ≤ 0.96; and 0.33 ≤ CT1 / CT2 < 0.

90.

12. The imaging optical lens assembly according to claim 9, characterized in that, The maximum imaging height of the optical lens group used for imaging is ImgH, and the focal length of the optical lens group used for imaging is f. It satisfies the following conditions: 0.53 < ImgH / f < 1.

50.

13. The imaging optical lens assembly according to claim 9, characterized in that, The distance from the aperture to the imaging plane on the optical axis is SL, the distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, the thickness of the first lens on the optical axis is CT1, and the thickness of the fourth lens on the optical axis is CT4, which satisfy the following conditions: 1.0 < SL / TL < 1.30; and 0.10 < CT1 / CT4 < 0.

90.

14. The imaging optical lens assembly according to claim 9, characterized in that, The distance between the third lens and the fourth lens on the optical axis is T34, and the distance between the fourth lens and the fifth lens on the optical axis is T45, which satisfies the following condition: 2.0 < T34 / T45 < 40.

0.

15. An optical lens assembly for imaging, characterized in that, It includes six lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side. The first lens has a concave object-side surface near the optical axis, the second lens has positive refractive power, the second lens has a convex image-side surface near the optical axis, the third lens has negative refractive power, the fourth lens has positive refractive power, the sixth lens has a concave image-side surface near the optical axis, the sixth lens has an aspherical image-side surface, and the sixth lens has at least one inflection point on its image-side surface. The imaging optical lens group comprises six lenses in total. The distance along the optical axis from the object-side surface of the first lens to an imaging plane is TL. The focal length of the imaging optical lens group is f. The distance along the optical axis from the image-side surface of the second lens to the object-side surface of the third lens is Dr4r5. The sum of the lens thicknesses along the optical axis of all lenses in the imaging optical lens group is ΣCT. The thickness along the optical axis of the first lens is CT1, and the thickness along the optical axis of the second lens is CT2. The following conditions must be met: 1.25 < TL / f < 2.60; 0.30 < Dr4r5 / ΣCT < 2.50; and CT1 / CT2 < 0.

90.

16. The imaging optical lens assembly according to claim 15, characterized in that, The sixth lens has at least one inflection point on its object-side surface. Each pair of adjacent lenses in the six lenses has an air gap along the optical axis. The radius of curvature of the image-side surface of the fourth lens is R8, and the radius of curvature of the object-side surface of the fifth lens is R9. These conditions are satisfied as follows: -1.0 < (R8+R9) / (R8-R9) < 0.

17. The imaging optical lens assembly according to claim 15, characterized in that, The distance along the optical axis from the image-side surface of the second lens to the object-side surface of the third lens is Dr4r5, and the sum of the lens thicknesses along the optical axis of all lenses in the imaging optical lens group is ΣCT, which satisfies the following condition: 0.75 < Dr4r5 / ΣCT < 1.

50.

18. The imaging optical lens assembly according to claim 15, characterized in that, The maximum effective radius of the object-side surface of the first lens is Y11, and the radius of curvature of the object-side surface of the first lens is R1, which satisfies the following conditions: -0.70 < Y11 / R1 < 0.

19. The imaging optical lens assembly according to claim 15, characterized in that, The optical axis spacing between the third lens and the fourth lens is T34, the optical axis spacing between the fourth lens and the fifth lens is T45, and the optical axis spacing between the fifth lens and the sixth lens is T56, satisfying the following conditions: 0.80 < T34 / (T45+T56) < 5.

0.

20. An optical lens assembly for imaging, characterized in that, It includes six lenses, which are arranged sequentially from the object side to the image side along the light path as a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and each of the six lenses has an object-side surface facing the object side and an image-side surface facing the image side. The imaging optical lens group also includes a reflective element disposed between the first lens and the sixth lens. The second lens has positive refractive power, the third lens has negative refractive power, the fourth lens has positive refractive power, at least one of the six lenses has at least one inflection point, and at least one of the six lenses is made of plastic. The imaging optical lens group comprises six lenses in total. At least one lens in the imaging optical lens group is a non-circular lens. The distance from the object-side surface of the first lens to an imaging plane on the optical axis is TL. The focal length of the imaging optical lens group is f. The maximum effective radius of the object-side surface of the first lens is Y11. The maximum imaging height of the imaging optical lens group is ImgH. Half of the maximum field of view in the imaging optical lens group is HFOV. The shortest distance from the center to the outer diameter of the non-circular lens is Dmin. The longest distance from the center to the outer diameter of the non-circular lens is Dmax. These conditions must be met. 0.70 < TL / f < 5.0; 0.03 < Y11 / ImgH < 0.50; 27.0 degrees < HFOV < 60.0 degrees; and Dmin / Dmax < 0.

80.

21. The imaging optical lens assembly according to claim 20, characterized in that, The focal length of the imaging optical lens group is f, the focal length of the first lens is f1, and the aperture value of the imaging optical lens group is Fno, which satisfies the following conditions: -0.30 < f / f1 < 0.10; and 1.0 < Fno < 2.

80.

22. The imaging optical lens assembly according to claim 20, characterized in that, The object-side surface of the first lens is concave near the optical axis, the image-side surface of the sixth lens is concave near the optical axis, and the first lens is made of plastic.

23. The imaging optical lens assembly according to claim 20, characterized in that, The sixth lens has at least one inflection point on its image-side surface, the first lens has a maximum effective radius of Y11 on its object-side surface, and the imaging optical lens group has a maximum imaging height of ImgH, satisfying the following conditions: 0.03 < Y11 / ImgH < 0.

40.

24. The imaging optical lens assembly according to claim 20, characterized in that, It also includes an aperture, wherein the distance from the aperture to the imaging plane on the optical axis is SL, the distance from the object-side surface of the first lens to the imaging plane on the optical axis is TL, and the focal length of the imaging optical lens group is f, which satisfies the following conditions: 0.80 < SL / TL < 2.0; and 1.0 < TL / f < 3.

0.

25. The imaging optical lens assembly according to claim 20, characterized in that, The reflective element is a plastic prism with a refractive index of Nr, which satisfies the following condition: 1.530 < Nr < 1.540。 26. The imaging optical lens assembly according to claim 20, characterized in that, The reflective element is disposed between the second lens and the third lens.

27. The imaging optical lens assembly according to claim 20, characterized in that, It also includes an aperture with a non-circular opening, and the maximum refractive index of all lenses in the imaging optical lens group is Nmax, which satisfies the following condition: 1.64 < Nmax < 1.

75.

28. An image capturing device, characterized in that, Include: The imaging optical lens assembly according to claim 20; and An electronic photosensitive element is disposed on the imaging surface of the imaging optical lens group; The height of the imaging device is less than 8.0 millimeters.

29. An image capturing device, characterized in that, Include: The imaging optical lens assembly according to claim 20; and An electronic photosensitive element is disposed on the imaging surface of the imaging optical lens group; The distance between the short side of the opening of the imaging device is less than 2.500 mm.

30. An electronic device, characterized in that, The device includes a display panel and an image capturing device, wherein the display panel and the image capturing device are located on the same side of the electronic device, and the image capturing device includes an imaging optical lens group according to claim 20 and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens group.

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