TWI588522B - Photographing optical lens assembly, image capturing unit and electronic device - Google Patents

Description

Imaging optical lens group, image capturing device and electronic device

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

In recent years, with the rapid development of miniaturized photographic lenses, the demand for miniature imaging modules has been increasing, and the photosensitive elements of general photographic lenses are nothing more than photosensitive coupled devices (CCDs) or complementary oxidized metal semiconductors. Complementary Metal-Oxide Semiconductor Sensor (CMOS Sensor), and with the advancement of semiconductor process technology, the pixel size of the photosensitive element is reduced, and today's electronic products are developed with a good function, light and thin appearance. Trends, therefore, miniaturized photographic lenses with good image quality have become the mainstream in the market.

In recent years, high-definition electronic products such as smart phones and wearable devices have met the demand for high image quality, and the demand for image capturing devices with large apertures and large photosensitive elements has increased. The number of lenses formed in the image taking device is also increased, which makes it difficult to miniaturize the lens, and large apertures may also cause aberrations. Therefore, how to make the optical system maintain imaging quality and miniaturization while arranging multiple lenses, large apertures, and large photosensitive elements is one of the problems that the industry is currently trying to solve.

The present invention provides an imaging optical lens group, an image capturing device, and an electronic device. The imaging optical lens group includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a second from the object side to the image side. Six lenses and a seventh lens. The lens having the refractive power in the imaging optical lens group is seven, and the sixth lens has a negative refractive power. When the above conditions are satisfied, it is advantageous to correct the aberration generated when the imaging optical lens group is arranged under a large aperture, and the refractive power of the imaging optical lens group near the imaging surface lens is more uniform, thereby effectively reducing the imaging optical lens group. Sensitivity.

The present invention provides an imaging optical lens unit including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens in this order from the object side to the image side. The first lens has a refractive power, and the object side surface is convex at the near optical axis. The second lens has a refractive power. The third lens has a refractive power. The fourth lens has a refractive power. The fifth lens has a refractive power. The sixth lens has a negative refractive power, and the object side surface is concave at the near optical axis, and the image side surface is convex at the near optical axis, and both the object side surface and the image side surface are aspherical. The seventh lens has a refractive power, and the image side surface is concave at the near optical axis, and the image side surface has at least one convex surface at an off-axis, and both the object side surface and the image side surface are aspherical. When the distance from the first lens object side surface to an imaging surface on the optical axis is TL, the maximum imaging height of the imaging optical lens group is ImgH, which satisfies the following conditions:

TL/ImgH < 3.0.

The invention further provides an image capturing device comprising the aforementioned imaging optical lens group and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the imaging optical lens group.

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

When TL/ImgH satisfies the above conditions, it can be advantageously miniaturized, and the lens volume is prevented from being excessively large, so that the optical lens for imaging is more suitable for application to an electronic device.

The imaging optical lens group sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens from the object side to the image side. The lens with refractive power in the imaging optical lens group is seven.

Each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens has an air gap on the optical axis, that is, the first lens, The second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens may be seven single non-engaged refractive power lenses. Since the process of bonding the lens is more complicated than that of the non-joining lens, especially in the joint surface of the two lenses, a high-precision curved surface is required in order to achieve high adhesion when the two lenses are joined, and in the process of bonding, it may be due to the deviation. Causes axis shift defects, affecting the overall optical imaging quality. Therefore, the first to seventh lenses in the image-taking optical lens group can be seven single non-joined refractive power lenses, thereby effectively improving the problems caused by the cemented lens.

The first lens has a refractive power, and the object side surface is convex at the near optical axis. Thereby, excessive concentration of the refractive power can be avoided to increase the aberration, and the sensitivity of the imaging optical lens group can be reduced.

The second lens has a refractive power. Thereby, the refractive power of the first lens can be adjusted to correct the aberration generated by the first lens.

The third lens has a refractive power. Thereby, the sensitivity of the imaging optical lens group can be effectively reduced, and the distribution of the refractive power of the imaging optical lens group can be adjusted to avoid excessive increase of astigmatism and distortion around the image, thereby improving the imaging quality.

The fourth lens has a refractive power. Thereby, the refractive power of the third lens can be adjusted to make the distribution of the refractive power of the imaging optical lens group relatively uniform.

The fifth lens has a refractive power, and the object side surface may be a concave surface on the near optical axis, and the image side surface may be a convex surface on the near optical axis. Thereby, it is helpful to correct the astigmatism of the imaging optical lens group to improve the image quality.

The sixth lens has a negative refractive power, and the object side surface is concave on the near optical axis, the image side surface is convex at the near optical axis, and the image side surface thereof has at least one concave surface at the off axis. Thereby, it is advantageous to correct the aberration generated when the imaging optical lens group is arranged with a large aperture, and to make the refractive power of the imaging optical lens group close to the imaging surface relatively uniform, thereby effectively reducing the sensitivity of the imaging optical lens group.

The seventh lens has a refractive power, and the image side surface is concave at the near optical axis, and the image side surface has at least one convex surface at the off-axis. Both the object side surface and the image side surface are aspherical. Thereby, the main point of the imaging optical lens group can be moved away from the image side end of the imaging optical lens group, so that the total optical length of the imaging optical lens group can be shortened, and the back focus can be effectively shortened, and the volume of the imaging optical lens group can be prevented from being excessively large.

The distance from the first lens object side surface to an imaging surface on the optical axis is TL, and the maximum imaging height of the imaging optical lens group is 1 mgH (that is, half of the total length of the effective sensing region of the electronic photosensitive element), which satisfies The following conditions are: TL/ImgH < 3.0. Thereby, it is advantageous to miniaturize to avoid excessive lens volume, and the image capturing optical lens set is more suitable for application to an electronic device. Preferably, it satisfies the following condition: TL / ImgH < 2.2.

The focal length of the imaging optical lens group is f, and the combined focal length of the first lens and the second lens is f12, which satisfies the following condition: 0.25 < f/f12 < 1.5. Thereby, the refractive power of the first lens and the second lens can be appropriately arranged, the aberration of the imaging optical lens group can be further corrected, and the back focus of the imaging optical lens group can be shortened to maintain the miniaturization thereof.

The first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, the fifth lens has a dispersion coefficient of V5, and the sixth lens has a dispersion coefficient of V6, which satisfies the following condition: 1.5 < (V1+V2)/( V5+V6) < 3.0. Thereby, the chromatic aberration can be effectively corrected.

The focal length of the sixth lens is f6, and the focal length of the imaging optical lens group is f, which satisfies the following condition: f6/f < -1.0. Thereby, the refractive power of the sixth lens can be appropriately adjusted, which contributes to shortening the back focus of the imaging optical lens group to maintain the miniaturization thereof.

The focal length of the imaging optical lens group is f, the focal length of the sixth lens is f6, and the focal length of the seventh lens is f7, which satisfies the following condition: -1.8 < (f/f6) + (f/f7) < -0.5. Thereby, the focal lengths of the sixth lens and the seventh lens can be appropriately configured to prevent the back focus from being too long, which contributes to shortening the total length of the imaging optical lens group.

The distance from the side surface of the seventh lens image to the imaging plane on the optical axis is BF, and the focal length of the imaging optical lens group is f, which satisfies the following condition: BF/f < 0.35. Thereby, it is ensured that the imaging optical lens group has a sufficient back focus to place other members.

The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens each have a refractive index, and a maximum of the refractive indexes is Nmax, among the refractive indexes The minimum value is Nmin, which satisfies the following conditions: 1.60 < Nmax < 1.70, and 1.50 < Nmin < 1.60. Thereby, the refractive index is prevented from being too small, which helps to correct the aberration, and also prevents the dispersion coefficient of the lens from being too low due to the excessive refractive index.

The distance from the first lens object side surface to the seventh lens image side surface on the optical axis is Td, and the entrance pupil aperture of the imaging optical lens group is EPD, which satisfies the following condition: Td/EPD < 3.0. Thereby, the amount of light entering the imaging optical lens group can be increased while maintaining the miniaturization thereof.

The sixth lens has a dispersion coefficient of V6 which satisfies the following condition: 10 < V6 < 32. Thereby, the chromatic aberration of the imaging optical lens group can be effectively corrected.

The radius of curvature of the side surface of the seventh lens image is R14, and the focal length of the imaging optical lens group is f, which satisfies the following condition: 0.20 < R14/f < 0.60. Thereby, it contributes to shortening the back focus of the imaging optical lens group.

The thickness of the sixth lens on the optical axis is CT6, and the thickness of the seventh lens on the optical axis is CT7, which satisfies the following condition: 0.75 < CT6/CT7 < 1.33. Thereby, the thickness of the appropriate sixth lens and the seventh lens can be adjusted to facilitate assembly of the imaging optical lens group and increase the production yield.

The imaging surface of the imaging optical lens group has a radius of curvature of Rimg which satisfies the following condition: -500 [mm] < Rimg < -20 [mm]. Thereby, the astigmatism around the image can be avoided, and the imaging quality of the off-axis field of view can be effectively improved.

The aperture of the imaging optical lens unit is Fno, which satisfies the following condition: Fno < 2.0. Thereby, the aperture size of the imaging optical lens group can be appropriately adjusted, so that the imaging optical lens group has a large aperture characteristic, and a higher shutter speed can be used to capture a clear image when the light is insufficient.

The sum of the lens thicknesses of the first lens to the seventh lens on the optical axis respectively is ΣCT (ie, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens respectively The sum of the lens thicknesses on the optical axis), the distance from the first lens object side surface to the seventh lens image side surface on the optical axis is Td, which satisfies the following condition: 0.60 < ΣCT/Td < 0.85. Thereby, the thickness of each lens is appropriately arranged to facilitate assembly and spatial arrangement of the imaging optical lens unit.

The aperture of the imaging optical lens group can be configured as a front aperture or a center aperture. The front aperture means that the aperture is disposed between the object and the first lens, and the center aperture means that the aperture is disposed between the first lens and the imaging surface. If the aperture is a front aperture, the exit pupil of the imaging optical lens group can be extended to a long distance from the imaging surface to have a telecentric effect, and the CCD or CMOS receiving image of the electronic photosensitive element can be increased. The efficiency; if it is a center aperture, it helps to expand the field of view of the system, so that the camera optical lens unit has the advantage of a wide-angle lens.

In the imaging optical lens assembly disclosed in the present invention, the material of the lens may be plastic or glass. When the lens is made of glass, the degree of freedom in the configuration of the refractive power can be increased. In addition, when the lens material is plastic, the production cost can be effectively reduced. In addition, an aspherical surface can be disposed on the surface of the lens, and the aspherical surface can be easily formed into a shape other than the spherical surface, and more control variables are obtained to reduce the aberration, thereby reducing the number of lenses required, thereby effectively reducing the total optical length. degree.

In the imaging optical lens assembly disclosed in the present invention, if the lens surface is convex and the convex position is not defined, it indicates that the lens surface is convex at the near optical axis; if the lens surface is concave and the concave position is not defined , indicating that the surface of the lens is concave at the near optical axis. If the refractive power or focal length of the lens does not define its regional position, it means that the refractive power or focal length of the lens is the refractive power or focal length of the lens at the near optical axis.

In the imaging optical lens assembly disclosed in the present invention, the image surface of the imaging optical lens group may be a plane or a curved surface having any curvature depending on the corresponding electronic photosensitive element, and particularly refers to a concave surface facing object. The curved surface in the side direction.

In the imaging optical lens assembly of the present invention, at least one aperture may be disposed, and the position may be set before the first lens, between the lenses or after the last lens, and the type of the aperture is such as a flare (Glare) Stop) or Field Stop, etc., to reduce stray light and help improve image quality.

The present invention further provides an image taking device comprising the aforementioned imaging optical lens group and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on an imaging surface of the imaging optical lens group. Preferably, the image capturing device may further comprise a lens barrel, a Holder Member or a combination thereof.

The invention further provides an electronic device comprising the aforementioned image capturing device. The electronic device may include, but is not limited to, a smart phone (as shown in FIG. 21), a tablet (as shown in FIG. 22), and a wearable device (as shown in FIG. 23). 21, 22 and 23, the image capturing device 10 can be applied in various aspects to a smart phone (as shown in FIG. 21), a tablet computer (as shown in FIG. 22), and a wearable device (as shown in FIG. 23). . Preferably, the electronic device may further comprise a control unit, a display unit, a storage unit, a temporary storage unit (RAM) or a combination thereof.

The imaging optical lens unit of the present invention is more suitable for use in an optical system for moving focus, and has the characteristics of excellent aberration correction and good imaging quality. The invention can also be applied in various aspects to three-dimensional (3D) image capture, digital camera, mobile device, digital tablet, smart television, network monitoring device, somatosensory game machine, driving recorder, reversing developing device and wearable device In an electronic device. The foregoing electronic device is merely illustrative of the practical application of the present invention, and does not limit the scope of application of the image taking device of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the light of the above-described embodiments, the specific embodiments are described below in detail with reference to the drawings.

<First Embodiment>

1 and FIG. 2, FIG. 1 is a schematic diagram of an image capturing apparatus according to a first embodiment of the present invention, and FIG. 2 is a spherical aberration, astigmatism, and distortion curve of the first embodiment from left to right. As can be seen from FIG. 1, the image taking device includes an imaging optical lens group (not labeled) and an electronic photosensitive element 195. The imaging optical lens group sequentially includes the aperture 100, the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, and the seventh lens 170 from the object side to the image side. An infrared filter element (IR-cut Filter) 180 and an imaging surface 190. The electronic photosensitive element 195 is disposed on the imaging surface 190. The lens (110-170) having refractive power in the imaging optical lens group is seven, and 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 are Any two adjacent lenses in the seventh lens 170 have an air gap on the optical axis.

The first lens 110 has a positive refractive power and is made of a plastic material. The object side surface 111 is convex at the near optical axis, and the image side surface 112 is concave at the near optical axis, and both surfaces thereof are aspherical.

The second lens 120 has a positive refractive power and is made of a plastic material. The object side surface 121 is convex at the near optical axis, and the image side surface 122 is concave at the near optical axis, and both surfaces thereof are aspherical.

The third lens 130 has a negative refractive power and is made of a plastic material. The object side surface 131 is convex at the near optical axis, and the image side surface 132 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 140 has a positive refractive power and is made of a plastic material. The object side surface 141 is a plane at the near optical axis, and the image side surface 142 is convex at the near optical axis, and both surfaces thereof are aspherical.

The fifth lens 150 has a negative refractive power and is made of a plastic material. The object side surface 151 is concave at the near optical axis, and the image side surface 152 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 160 has a negative refractive power and is made of a plastic material. The object side surface 161 is concave at the near optical axis, and the image side surface 162 is convex at the near optical axis, and the image side surface 162 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 170 has a negative refractive power and is made of a plastic material. The object side surface 171 is convex at the near optical axis, and the image side surface 172 is concave at the near optical axis, and the image side surface 172 has an off axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 180 is glass, which is disposed between the seventh lens 170 and the imaging surface 190, and does not affect the focal length of the imaging optical lens group.

The aspherical curve equations of the above lenses are expressed as follows:

;among them:

X: a point on the aspherical surface that is Y from the optical axis, and a relative distance from the tangent plane that is tangent to the intersection on the aspherical optical axis;

Y: the vertical distance between the point on the aspheric curve and the optical axis;

R: radius of curvature;

k: the taper coefficient;

Ai: The i-th order aspheric coefficient.

In the imaging optical lens group of the first embodiment, the focal length of the imaging optical lens group is f, the aperture value (F-number) of the imaging optical lens group is Fno, and half of the maximum viewing angle in the imaging optical lens group is HFOV, and the values are as follows :f = 5.30 mm (mm), Fno = 2.10, HFOV = 37.5 degrees (deg.).

The first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, and the seventh lens 170 each have a refractive index, and the maximum value of the refractive indexes is Nmax The minimum of these refractive indices is Nmin, which satisfies the following conditions: Nmax = 1.63, and Nmin = 1.54.

The sixth lens 160 has a dispersion coefficient of V6 which satisfies the following condition: V6 = 23.4.

The first lens 110 has a dispersion coefficient of V1, the second lens 120 has a dispersion coefficient of V2, the fifth lens 150 has a dispersion coefficient of V5, and the sixth lens 160 has a dispersion coefficient of V6, which satisfies the following condition: (V1+V2) /(V5+V6) = 2.39.

The thickness of the sixth lens 160 on the optical axis is CT6, and the thickness of the seventh lens 170 on the optical axis is CT7, which satisfies the following condition: CT6/CT7 = 1.14.

The sum of the lens thicknesses of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, and the seventh lens 170 on the optical axis respectively is ΣCT, the first lens The distance from the object side surface 111 to the seventh lens image side surface 172 on the optical axis is Td, which satisfies the following condition: ΣCT/Td = 0.634.

The imaging surface 190 of the imaging optical lens group has a radius of curvature of Rimg which satisfies the following condition: Rimg = ∞ [mm].

The radius of curvature of the seventh lens image side surface 172 is R14, and the focal length of the imaging optical lens group is f, which satisfies the following condition: R14/f = 0.41.

The focal length of the imaging optical lens group is f, and the combined focal length of the first lens 110 and the second lens 120 is f12, which satisfies the following condition: f/f12 = 1.05.

The focal length of the imaging optical lens group is f, and the focal length of the sixth lens 160 is f6, which satisfies the following condition: f6/f = -4.00.

The focal length of the imaging optical lens group is f, the focal length of the sixth lens 160 is f6, and the focal length of the seventh lens 170 is f7, which satisfies the following condition: (f/f6) + (f/f7) = -1.46.

The distance from the seventh lens image side surface 172 to the imaging surface 190 on the optical axis is BF, and the focal length of the imaging optical lens group is f, which satisfies the following condition: BF/f = 0.21.

The maximum imaging height of the imaging optical lens group is ImgH, and the distance from the first lens object side surface 111 to the imaging surface 190 on the optical axis is TL, which satisfies the following condition: TL / ImgH = 1.73.

The distance from the first lens object side surface 111 to the seventh lens image side surface 172 on the optical axis is Td, and the entrance pupil diameter of the imaging optical lens group is EPD, which satisfies the following condition: Td/EPD = 2.29.

Refer to Table 1 and Table 2 below.

Table 1 is the detailed structural data of the first embodiment, in which the unit of curvature radius, thickness, and focal length is mm, and the surfaces 0 to 18 sequentially represent the surfaces from the object side to the image side. Table 2 is the aspherical data in the first embodiment, where k is the taper coefficient in the aspheric curve equation, and A4 to A16 are the 4th to 16th order aspheric coefficients of each surface. In addition, the following table of the embodiments corresponds to the schematic diagrams and the aberration diagrams of the respective embodiments, and the definitions of the data in the table are the same as those of the first embodiment and the second embodiment, and are not described herein.

<Second embodiment>

Referring to FIG. 3 and FIG. 4, FIG. 3 is a schematic diagram of an image capturing apparatus according to a second embodiment of the present invention, and FIG. 4 is a spherical aberration, astigmatism and distortion curve of the second embodiment from left to right. As can be seen from FIG. 3, the image taking device includes an imaging optical lens group (not labeled) and an electronic photosensitive element 295. The imaging optical lens group sequentially includes the aperture 200, the first lens 210, the second lens 220, the third lens 230, the fourth lens 240, the fifth lens 250, the sixth lens 260, and the seventh lens 270 from the object side to the image side. The infrared filter filter element 280 and the imaging surface 290 are filtered. The electronic photosensitive element 295 is disposed on the imaging surface 290. The lens (210-270) having refractive power in the imaging optical lens group is seven, and the first lens 210, the second lens 220, the third lens 230, the fourth lens 240, the fifth lens 250, and the sixth lens 260 are Any two adjacent lenses in the seventh lens 270 have an air gap on the optical axis.

The first lens 210 has a positive refractive power and is made of a plastic material. The object side surface 211 is convex at the near optical axis, and the image side surface 212 is concave at the near optical axis, and both surfaces thereof are aspherical.

The second lens 220 has a positive refractive power and is made of a plastic material. The object side surface 221 is convex at the near optical axis, and the image side surface 222 is convex at the near optical axis, and both surfaces thereof are aspherical.

The third lens 230 has a negative refractive power and is made of a plastic material. The object side surface 231 is convex at the near optical axis, and the image side surface 232 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 240 has a positive refractive power and is made of a plastic material. The object side surface 241 is convex at the near optical axis, and the image side surface 242 is convex at the near optical axis, and both surfaces thereof are aspherical.

The fifth lens 250 has a positive refractive power and is made of a plastic material. The object side surface 251 is concave at the near optical axis, and the image side surface 252 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 260 has a negative refractive power and is made of a plastic material. The object side surface 261 is concave at the near optical axis, and the image side surface 262 is convex at the near optical axis, and the image side surface 262 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 270 has a negative refractive power and is made of a plastic material. The object side surface 271 is concave at the near optical axis, and the image side surface 272 is concave at the near optical axis, and the image side surface 272 has an off axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 280 is glass, which is disposed between the seventh lens 270 and the imaging surface 290, and does not affect the focal length of the imaging optical lens group.

Please refer to Table 3 and Table 4 below.

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

<Third embodiment>

Please refer to FIG. 5 and FIG. 6. FIG. 5 is a schematic diagram of the image capturing device according to the third embodiment of the present invention. FIG. 6 is a spherical aberration, astigmatism and distortion curve of the third embodiment from left to right. As can be seen from FIG. 5, the image taking device includes an imaging optical lens group (not labeled) and an electronic photosensitive element 395. The imaging optical lens group sequentially includes the aperture 300, the first lens 310, the second lens 320, the third lens 330, the fourth lens 340, the fifth lens 350, the sixth lens 360, and the seventh lens 370 from the object side to the image side. The infrared filter filter element 380 and the imaging surface 390 are filtered. The electronic photosensitive element 395 is disposed on the imaging surface 390. The lens (310-370) having refractive power in the imaging optical lens group is seven, and the first lens 310, the second lens 320, the third lens 330, the fourth lens 340, the fifth lens 350, and the sixth lens 360 are Any two adjacent lenses in the seventh lens 370 have an air gap on the optical axis.

The first lens 310 has a positive refractive power and is made of a plastic material. The object side surface 311 is convex at the near optical axis, and the image side surface 312 is concave at the near optical axis, and both surfaces thereof are aspherical.

The second lens 320 has a positive refractive power and is made of a plastic material. The object side surface 321 is concave at the near optical axis, and the image side surface 322 is convex at the near optical axis, and both surfaces thereof are aspherical.

The third lens 330 has a negative refractive power and is made of a plastic material. The object side surface 331 is convex at the near optical axis, and the image side surface 332 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 340 has a positive refractive power and is made of a plastic material. The object side surface 341 is convex at the near optical axis, and the image side surface 342 is convex at the near optical axis, and both surfaces thereof are aspherical.

The fifth lens 350 has a negative refractive power and is made of a plastic material. The object side surface 351 is concave at the near optical axis, and the image side surface 352 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 360 has a negative refractive power and is made of a plastic material. The object side surface 361 is concave at the near optical axis, and the image side surface 362 is convex at the low beam axis, and the image side surface 362 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 370 has a negative refractive power and is made of a plastic material. The object side surface 371 is concave at the near optical axis, and the image side surface 372 is concave at the near optical axis, and the image side surface 372 has an off axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 380 is glass, which is disposed between the seventh lens 370 and the imaging surface 390, and does not affect the focal length of the imaging optical lens group.

Please refer to Table 5 and Table 6 below.

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

<Fourth embodiment>

Please refer to FIG. 7 and FIG. 8. FIG. 7 is a schematic diagram of the image capturing apparatus according to the fourth embodiment of the present invention. FIG. 8 is a spherical aberration, astigmatism and distortion curve of the fourth embodiment from left to right. As can be seen from FIG. 7, the image taking device includes an imaging optical lens group (not labeled) and an electronic photosensitive element 495. The imaging optical lens group sequentially includes the aperture 400, the first lens 410, the second lens 420, the third lens 430, the fourth lens 440, the fifth lens 450, the sixth lens 460, and the seventh lens 470 from the object side to the image side. The infrared filter filters the filter element 480 and the imaging surface 490. The electronic photosensitive element 495 is disposed on the imaging surface 490. The lens (410-470) having a refractive power in the imaging optical lens group is seven, and the first lens 410, the second lens 420, the third lens 430, the fourth lens 440, the fifth lens 450, and the sixth lens 460 are Any two adjacent lenses in the seventh lens 470 have an air gap on the optical axis.

The first lens 410 has a positive refractive power and is made of a plastic material. The object side surface 411 is convex at the near optical axis, and the image side surface 412 is convex at the near optical axis, and both surfaces thereof are aspherical.

The second lens 420 has a negative refractive power and is made of a plastic material. The object side surface 421 is convex at the near optical axis, and the image side surface 422 is concave at the near optical axis, and both surfaces thereof are aspherical.

The third lens 430 has a positive refractive power and is made of a plastic material. The object side surface 431 is convex at the near optical axis, and the image side surface 432 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 440 has a positive refractive power and is made of a plastic material. The object side surface 441 is concave at the near optical axis, and the image side surface 442 is convex at the near optical axis, and both surfaces thereof are aspherical.

The fifth lens 450 has a negative refractive power and is made of a plastic material. The object side surface 451 is concave at the near optical axis, and the image side surface 452 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 460 has a negative refractive power and is made of a plastic material. The object side surface 461 is concave at the near optical axis, and the image side surface 462 is convex at the near optical axis, and the image side surface 462 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 470 has a negative refractive power and is made of a plastic material. The object side surface 471 is convex at the near optical axis, and the image side surface 472 is concave at the near optical axis, and the image side surface 472 has an off axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 480 is glass, which is disposed between the seventh lens 470 and the imaging surface 490, and does not affect the focal length of the imaging optical lens group.

Please refer to Table 7 and Table 8 below.

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

<Fifth Embodiment>

Referring to FIG. 9 and FIG. 10, FIG. 9 is a schematic diagram of an image capturing apparatus according to a fifth embodiment of the present invention. FIG. 10 is a spherical aberration, astigmatism and distortion curve of the fifth embodiment from left to right. As can be seen from FIG. 9, the image taking device includes an imaging optical lens group (not labeled) and an electronic photosensitive element 595. The imaging optical lens group sequentially includes a first lens 510, a diaphragm 500, a second lens 520, a third lens 530, a fourth lens 540, a fifth lens 550, a sixth lens 560, and a seventh lens 570 from the object side to the image side. The infrared filter filters the filter element 580 and the imaging surface 590. The electronic photosensitive element 595 is disposed on the imaging surface 590. The lens (510-570) having refractive power in the imaging optical lens group is seven, and the first lens 510, the second lens 520, the third lens 530, the fourth lens 540, the fifth lens 550, and the sixth lens 560 are Any two adjacent lenses in the seventh lens 570 have an air gap on the optical axis.

The first lens 510 has a positive refractive power and is made of a plastic material. The object side surface 511 is convex at the near optical axis, and the image side surface 512 is concave at the near optical axis, and both surfaces thereof are aspherical.

The second lens 520 has a negative refractive power and is made of a plastic material. The object side surface 521 is convex at the near optical axis, and the image side surface 522 is concave at the near optical axis, and both surfaces thereof are aspherical.

The third lens 530 has a negative refractive power and is made of a plastic material. The object side surface 531 is convex at the near optical axis, and the image side surface 532 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 540 has a positive refractive power and is made of a plastic material. The object side surface 541 is concave at the near optical axis, and the image side surface 542 is convex at the near optical axis, and both surfaces thereof are aspherical.

The fifth lens 550 has a negative refractive power and is made of a plastic material. The object side surface 551 is concave at the near optical axis, and the image side surface 552 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 560 has a negative refractive power and is made of a plastic material. The object side surface 561 is concave at the near optical axis, and the image side surface 562 is convex at the near optical axis, and the image side surface 562 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 570 has a positive refractive power and is made of a plastic material. The object side surface 571 is convex at the near optical axis, and the image side surface 572 is concave at the near optical axis, and the image side surface 572 has an off-axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 580 is glass, which is disposed between the seventh lens 570 and the imaging surface 590, and does not affect the focal length of the imaging optical lens group.

Please refer to the following list IX and Table 10.

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

<Sixth embodiment>

Referring to FIG. 11 and FIG. 12, FIG. 11 is a schematic diagram of a image capturing apparatus according to a sixth embodiment of the present invention, and FIG. 12 is a spherical aberration, astigmatism and distortion curve of the sixth embodiment from left to right. As can be seen from FIG. 11, the image taking device includes an imaging optical lens group (not otherwise labeled) and an electronic photosensitive element 695. The imaging optical lens group sequentially includes the aperture 600, the first lens 610, the second lens 620, the third lens 630, the fourth lens 640, the fifth lens 650, the sixth lens 660, and the seventh lens 670 from the object side to the image side. The infrared filter filters the filter element 680 and the imaging surface 690. The electronic photosensitive element 695 is disposed on the imaging surface 690. The lens (610-670) having refractive power in the imaging optical lens group is seven, and the first lens 610, the second lens 620, the third lens 630, the fourth lens 640, the fifth lens 650, and the sixth lens 660 are Any two adjacent lenses in the seventh lens 670 have an air gap on the optical axis.

The first lens 610 has a positive refractive power and is made of glass. The object side surface 611 is convex at the near optical axis, and the image side surface 612 is concave at the near optical axis, and both surfaces thereof are aspherical.

The second lens 620 has a negative refractive power and is made of a plastic material. The object side surface 621 is concave at the near optical axis, and the image side surface 622 is convex at the near optical axis, and both surfaces thereof are aspherical.

The third lens 630 has a negative refractive power and is made of a plastic material. The object side surface 631 is convex at the near optical axis, and the image side surface 632 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 640 has a positive refractive power and is made of a plastic material. The object side surface 641 is concave at the near optical axis, and the image side surface 642 is convex at the near optical axis, and both surfaces thereof are aspherical.

The fifth lens 650 has a negative refractive power and is made of a plastic material. The object side surface 651 is concave at the near optical axis, and the image side surface 652 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 660 has a negative refractive power and is made of a plastic material. The object side surface 661 is concave at the near optical axis, and the image side surface 662 is convex at the near optical axis, and the image side surface 662 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 670 has a negative refractive power and is made of a plastic material. The object side surface 671 is convex at the near optical axis, and the image side surface 672 is concave at the near optical axis, and the image side surface 672 has an off axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 680 is glass, which is disposed between the seventh lens 670 and the imaging surface 690, and does not affect the focal length of the imaging optical lens group.

Please refer to Table 11 and Table 12 below.

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

<Seventh embodiment>

Referring to FIG. 13 and FIG. 14 , FIG. 13 is a schematic diagram of the image capturing apparatus according to the seventh embodiment of the present invention, and FIG. 14 is a spherical aberration, astigmatism and distortion curve of the seventh embodiment from left to right. As can be seen from FIG. 13, the image taking device includes an imaging optical lens group (not labeled) and an electronic photosensitive element 795. The imaging optical lens group sequentially includes a first lens 710, an aperture 700, a second lens 720, a third lens 730, a fourth lens 740, a fifth lens 750, a sixth lens 760, and a seventh lens 770 from the object side to the image side. The infrared filter filters the filter element 780 and the imaging surface 790. The electronic photosensitive element 795 is disposed on the imaging surface 790. The lens (710-770) having refractive power in the imaging optical lens group is seven, and the first lens 710, the second lens 720, the third lens 730, the fourth lens 740, the fifth lens 750, and the sixth lens 760 are Any two adjacent lenses in the seventh lens 770 have an air gap on the optical axis.

The first lens 710 has a positive refractive power and is made of a plastic material. The object side surface 711 is convex at the near optical axis, and the image side surface 712 is concave at the near optical axis, and both surfaces thereof are aspherical.

The second lens 720 has a negative refractive power and is made of a plastic material. The object side surface 721 is convex at the near optical axis, and the image side surface 722 is concave at the near optical axis, and both surfaces thereof are aspherical.

The third lens 730 has a positive refractive power and is made of a plastic material. The object side surface 731 is concave at the near optical axis, and the image side surface 732 is convex at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 740 has a negative refractive power and is made of a plastic material. The object side surface 741 is convex at the near optical axis, and the image side surface 742 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fifth lens 750 has a positive refractive power and is made of a plastic material. The object side surface 751 is concave at the near optical axis, and the image side surface 752 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 760 has a negative refractive power and is made of a plastic material. The object side surface 761 is concave at the near optical axis, and the image side surface 762 is convex at the near optical axis, and the image side surface 762 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 770 has a negative refractive power and is made of a plastic material. The object side surface 771 is convex at the near optical axis, and the image side surface 772 is concave at the near optical axis, and the image side surface 772 has an off axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 780 is glass, which is disposed between the seventh lens 770 and the imaging surface 790, and does not affect the focal length of the imaging optical lens group.

Please refer to Table 13 and Table 14 below.

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

<Eighth Embodiment>

15 and FIG. 16, FIG. 15 is a schematic diagram of an image capturing apparatus according to an eighth embodiment of the present invention, and FIG. 16 is a spherical aberration, astigmatism, and distortion curve diagram of the eighth embodiment from left to right. As can be seen from Fig. 15, the image taking device includes an imaging optical lens group (not otherwise labeled) and an electronic photosensitive element 895. The imaging optical lens group sequentially includes an aperture 800, a first lens 810, a second lens 820, a third lens 830, a fourth lens 840, a fifth lens 850, a sixth lens 860, and a seventh lens 870 from the object side to the image side. The infrared filter filters the filter element 880 and the imaging surface 890. The electronic photosensitive element 895 is disposed on the imaging surface 890. The lens (810-870) having refractive power in the imaging optical lens group is seven, and the first lens 810, the second lens 820, the third lens 830, the fourth lens 840, the fifth lens 850, and the sixth lens 860 are Any two adjacent lenses in the seventh lens 870 have an air gap on the optical axis.

The first lens 810 has a positive refractive power and is made of a plastic material. The object side surface 811 is convex at the near optical axis, and the image side surface 812 is concave at the near optical axis, and both surfaces thereof are aspherical.

The second lens 820 has a negative refractive power and is made of a plastic material. The object side surface 821 is concave at the near optical axis, and the image side surface 822 is concave at the near optical axis, and both surfaces thereof are aspherical.

The third lens 830 has a positive refractive power and is made of a plastic material. The object side surface 831 is convex at the near optical axis, and the image side surface 832 is convex at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 840 has a positive refractive power and is made of a plastic material. The object side surface 841 is convex at the near optical axis, and the image side surface 842 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fifth lens 850 has a positive refractive power and is made of a plastic material. The object side surface 851 is concave at the near optical axis, and the image side surface 852 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 860 has a negative refractive power and is made of a plastic material. The object side surface 861 is concave at the near optical axis, and the image side surface 862 is convex at the near optical axis, and the image side surface 862 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 870 has a negative refractive power and is made of a plastic material. The object side surface 871 is convex at the near optical axis, and the image side surface 872 is concave at the near optical axis, and the image side surface 872 has an off axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 880 is glass, which is disposed between the seventh lens 870 and the imaging surface 890, and does not affect the focal length of the imaging optical lens group.

Please refer to Table 15 and Table 16 below.

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

<Ninth embodiment>

Referring to FIG. 17 and FIG. 18, FIG. 17 is a schematic diagram of an image capturing apparatus according to a ninth embodiment of the present invention, and FIG. 18 is a spherical aberration, astigmatism and distortion curve of the ninth embodiment from left to right. As can be seen from Fig. 17, the image taking device includes an imaging optical lens group (not otherwise labeled) and an electron photosensitive element 995. The imaging optical lens group sequentially includes a first lens 910, a second lens 920, a diaphragm 900, a third lens 930, a fourth lens 940, a fifth lens 950, a sixth lens 960, and a seventh lens 970 from the object side to the image side. The infrared filter filters the filter element 980 and the imaging surface 990. The electronic photosensitive element 995 is disposed on the imaging surface 990. The lens (910-970) having refractive power in the imaging optical lens group is seven, and the first lens 910, the second lens 920, the third lens 930, the fourth lens 940, the fifth lens 950, and the sixth lens 960 are Any two adjacent lenses in the seventh lens 970 have an air gap on the optical axis.

The first lens 910 has a negative refractive power and is made of a plastic material. The object side surface 911 is convex at the near optical axis, and the image side surface 912 is concave at the near optical axis, and both surfaces thereof are aspherical.

The second lens 920 has a positive refractive power and is made of a plastic material. The object side surface 921 is convex at the near optical axis, and the image side surface 922 is convex at the near optical axis, and both surfaces thereof are aspherical.

The third lens 930 has a negative refractive power and is made of a plastic material. The object side surface 931 is convex at the near optical axis, and the image side surface 932 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 940 has a positive refractive power and is made of a plastic material. The object side surface 941 is convex at the near optical axis, and the image side surface 942 is convex at the near optical axis, and both surfaces thereof are aspherical.

The fifth lens 950 has a negative refractive power and is made of a plastic material. The object side surface 951 is concave at the near optical axis, and the image side surface 952 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 960 has a negative refractive power and is made of a plastic material. The object side surface 961 is concave at the near optical axis, and the image side surface 962 is convex at the near optical axis, and the image side surface 962 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 970 has a negative refractive power and is made of a plastic material. The object side surface 971 is convex at the near optical axis, and the image side surface 972 is concave at the near optical axis, and the image side surface 972 has an off axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 980 is glass, which is disposed between the seventh lens 970 and the imaging surface 990, and does not affect the focal length of the imaging optical lens group.

Please refer to Table 17 and Table 18 below.

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

<Tenth embodiment>

Referring to FIG. 19 and FIG. 20, FIG. 19 is a schematic diagram of an image capturing apparatus according to a tenth embodiment of the present invention, and FIG. 20 is a spherical aberration, astigmatism and distortion curve of the tenth embodiment from left to right. As can be seen from Fig. 19, the image taking device includes an imaging optical lens group (not otherwise labeled) and an electronic photosensitive element 1095. The imaging optical lens group sequentially includes the aperture 1000, the first lens 1010, the second lens 1020, the third lens 1030, the fourth lens 1040, the fifth lens 1050, the sixth lens 1060, and the seventh lens 1070 from the object side to the image side. The infrared filter filters the filter element 1080 and the imaging surface 1090. The electronic photosensitive element 1095 is disposed on the imaging surface 1090. The lens (1010-1070) having a refractive power in the imaging optical lens group is seven, and the first lens 1010, the second lens 1020, the third lens 1030, the fourth lens 1040, the fifth lens 1050, and the sixth lens 1060 are Any two adjacent lenses in the seventh lens 1070 have an air gap on the optical axis.

The first lens 1010 has a positive refractive power and is made of a plastic material. The object side surface 1011 is convex at the near optical axis, and the image side surface 1012 is concave at the near optical axis, and both surfaces thereof are aspherical.

The second lens 1020 has a negative refractive power and is made of a plastic material. The object side surface 1021 is convex at the low optical axis, and the image side surface 1022 is concave at the low optical axis, and both surfaces thereof are aspherical.

The third lens 1030 has a positive refractive power and is made of a plastic material. The object side surface 1031 is convex at the near optical axis, and the image side surface 1032 is concave at the near optical axis, and both surfaces thereof are aspherical.

The fourth lens 1040 has a positive refractive power and is made of a plastic material. The object side surface 1041 is convex at the near optical axis, and the image side surface 1042 is concave at the low optical axis, and both surfaces thereof are aspherical.

The fifth lens 1050 has a positive refractive power and is made of a plastic material. The object side surface 1051 is concave at the near optical axis, and the image side surface 1052 is convex at the near optical axis, and both surfaces thereof are aspherical.

The sixth lens 1060 has a negative refractive power and is made of a plastic material. The object side surface 1061 is concave at the near optical axis, and the image side surface 1062 is convex at the near optical axis, and the image side surface 1062 has an off axis. At least one concave surface, both surfaces of which are aspherical.

The seventh lens 1070 has a negative refractive power and is made of a plastic material. The object side surface 1071 is convex at the near optical axis, and the image side surface 1072 is concave at the near optical axis, and the image side surface 1072 has an off axis. At least one convex surface, both surfaces of which are aspherical.

The material of the infrared filter element 1080 is glass, which is disposed between the seventh lens 1070 and the imaging surface 1090, and does not affect the focal length of the imaging optical lens group.

Please refer to the following list 19 and Table 20.

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

The above imaging device can be disposed in the electronic device. The imaging optical lens assembly provided by the present invention uses seven lenses having a refractive power, wherein the sixth lens has a negative refractive power. When the above conditions are satisfied, it is advantageous to correct the aberration generated when the imaging optical lens group is arranged with a large aperture, so that the refractive power of the imaging optical lens group close to the imaging surface is relatively uniform, and the sensitivity of the imaging optical lens group is effectively reduced.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

10‧‧‧Image capture device
100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 ‧ ‧ aperture
110, 210, 310, 410, 510, 610, 710, 810, 910, 1010‧‧‧ first lens
111, 211, 311, 411, 511, 611, 711, 811, 911, 1011‧‧‧
112, 212, 312, 412, 512, 612, 712, 812, 912, 1012‧‧‧ image side surface
120, 220, 320, 420, 520, 620, 720, 820, 920, 1020‧‧‧ second lens
121, 221, 321, 421, 521, 621, 721, 821, 921, 1021‧‧‧
122, 222, 322, 422, 522, 622, 722, 822, 922, 1022‧‧‧ image side surface
130, 230, 330, 430, 530, 630, 730, 830, 930, 1030‧‧‧ third lens
131, 231, 331, 431, 531, 631, 731, 831, 931, 1031‧‧‧
132, 232, 332, 432, 532, 632, 732, 832, 932, 1032‧‧‧ image side surface
140, 240, 340, 440, 540, 640, 740, 840, 940, 1040‧‧‧ fourth lens
141, 241, 341, 441, 541, 641, 741, 841, 941, 1041‧‧‧
142, 242, 342, 442, 542, 642, 742, 842, 942, 1042 ‧ ‧ side surface
150, 250, 350, 450, 550, 650, 750, 850, 950, 1050‧‧‧ fifth lens
151, 251, 351, 451, 551, 651, 751, 851, 951, 1051 ‧ ‧ ‧ side surface
152, 252, 352, 452, 552, 652, 752, 852, 952, 1052‧‧‧ image side surface
160, 260, 360, 460, 560, 660, 760, 860, 960, 1060‧‧‧ sixth lens
161, 261, 361, 461, 561, 661, 761, 861, 961, 1061‧‧‧
162, 262, 362, 462, 562, 662, 762, 862, 962, 1062‧‧‧ side surface
170, 270, 370, 470, 570, 670, 770, 870, 970, 1070‧‧ ‧ seventh lens
171, 271, 371, 471, 571, 671, 771, 871, 971, 1071‧‧‧
172, 272, 372, 472, 572, 672, 772, 872, 972, 1072‧‧‧ side surface
180, 280, 380, 480, 580, 680, 780, 880, 980, 1080‧‧‧ infrared filter elements
190, 290, 390, 490, 590, 690, 790, 890, 990, 1090‧‧ ‧ imaging surface
195, 295, 395, 495, 595, 695, 795, 895, 995, 1095‧‧‧ Electronic photosensitive elements
BF‧‧‧The distance from the side surface of the seventh lens image to the optical axis on the imaging surface
CT6‧‧‧ Thickness of the sixth lens on the optical axis
CT7‧‧‧ thickness of the seventh lens on the optical axis
The aperture of the EPD‧‧‧ camera optical lens unit
f‧‧‧The focal length of the camera optical lens group
F12‧‧‧Combined focal length of the first lens and the second lens
F6‧‧‧The focal length of the sixth lens
F7‧‧‧The focal length of the seventh lens
Maximum viewing angle of FOV‧‧· camera optical lens unit
Aperture value of Fno‧‧‧ camera optical lens unit
Half of the maximum angle of view in the HFOV‧‧ camera optical lens group
Maximum imaging height of the ImgH‧‧‧ camera optical lens unit
The maximum value of the refractive indices of the Nmax‧‧‧ first lens, second lens, third lens, fourth lens, fifth lens, sixth lens and seventh lens
Nmin‧‧‧ the minimum of the refractive indices of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens
R14‧‧‧ radius of curvature of the side surface of the seventh lens
Radius of curvature of the imaging surface of the Rimg‧‧‧ camera optical lens group
TL‧‧‧Distance from the side surface of the first lens to the optical axis of the imaging surface
Td‧‧‧Distance from the first lens object side surface to the seventh lens image side surface on the optical axis
V1‧‧‧Dispersion coefficient of the first lens
V2‧‧‧Dispersion coefficient of the second lens
Dispersion coefficient of V5‧‧‧ fifth lens
V6‧‧‧Dispersion coefficient of the sixth lens ΣCT‧‧‧The sum of the lens thicknesses of the first lens to the seventh lens on the optical axis

1 is a schematic view of an image taking device according to a first embodiment of the present invention. Fig. 2 is a left-to-right sequence of spherical aberration, astigmatism, and distortion of the first embodiment. 3 is a schematic diagram of an image capturing apparatus according to a second embodiment of the present invention. 4 is a spherical aberration, astigmatism, and distortion curve diagram of the second embodiment from left to right. FIG. 5 is a schematic diagram of an image capturing apparatus according to a third embodiment of the present invention. Fig. 6 is a left-to-right sequence of spherical aberration, astigmatism, and distortion of the third embodiment. FIG. 7 is a schematic diagram of an image capturing apparatus according to a fourth embodiment of the present invention. Fig. 8 is a spherical aberration, astigmatism, and distortion curve of the fourth embodiment from left to right. FIG. 9 is a schematic diagram of an image capturing apparatus according to a fifth embodiment of the present invention. Fig. 10 is a spherical aberration, astigmatism, and distortion curve diagram of the fifth embodiment from left to right. FIG. 11 is a schematic diagram of an image capturing apparatus according to a sixth embodiment of the present invention. Fig. 12 is a spherical aberration, astigmatism, and distortion curve of the sixth embodiment, from left to right. FIG. 13 is a schematic diagram of an image capturing apparatus according to a seventh embodiment of the present invention. Fig. 14 is a spherical aberration, astigmatism, and distortion curve of the seventh embodiment, from left to right. FIG. 15 is a schematic diagram of an image capturing apparatus according to an eighth embodiment of the present invention. Fig. 16 is a spherical aberration, astigmatism, and distortion curve diagram of the eighth embodiment from left to right. FIG. 17 is a schematic diagram of an image capturing apparatus according to a ninth embodiment of the present invention. Fig. 18 is a spherical aberration, astigmatism, and distortion curve of the ninth embodiment in order from left to right. FIG. 19 is a schematic diagram of an image capturing apparatus according to a tenth embodiment of the present invention. Figure 20 is a spherical aberration, astigmatism, and distortion curve of the tenth embodiment from left to right. 21 is a schematic diagram of an electronic device in accordance with the present invention. Figure 22 is a schematic illustration of another electronic device in accordance with the present invention. 23 is a schematic diagram of still another electronic device in accordance with the present invention.

100‧‧‧ aperture

110‧‧‧first lens

111‧‧‧Side side surface

112‧‧‧ image side surface

120‧‧‧second lens

121‧‧‧Side side surface

122‧‧‧ image side surface

130‧‧‧ third lens

131‧‧‧ object side surface

132‧‧‧Image side surface

140‧‧‧Fourth lens

141‧‧‧ object side surface

142‧‧‧ image side surface

150‧‧‧ fifth lens

151‧‧‧ object side surface

152‧‧‧ image side surface

160‧‧‧ sixth lens

161‧‧‧ object side surface

162‧‧‧ image side surface

170‧‧‧ seventh lens

171‧‧‧ object side surface

172‧‧‧ image side surface

180‧‧‧Infrared filter element

190‧‧‧ imaging surface

195‧‧‧Electronic photosensitive element

Claims (21)

An imaging optical lens group comprising: a first lens having an object side surface convex at a near optical axis; a second lens; a third lens; a fourth lens; a fifth lens having a negative refractive power, the object side surface being concave at the near optical axis, the object side surface and the image side surface being aspherical surfaces, and a seventh lens having an image side surface in the vicinity The optical axis is a concave surface, and the image side surface has at least one convex surface at an off-axis, and the object side surface and the image side surface are both aspherical surfaces; wherein the total number of lenses in the imaging optical lens group is seven, the first The distance from the side surface of the lens object to an imaging surface on the optical axis is TL, the maximum imaging height of the imaging optical lens group is ImgH, the focal length of the imaging optical lens group is f, and the synthesis of the first lens and the second lens The focal length is f12, the focal length of the sixth lens is f6, and the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens each have a Refractive index, the maximum of the refractive indices is Nmax, the first The distance from the lens object side surface to the seventh lens image side surface on the optical axis is Td, and the entrance pupil diameter of the imaging optical lens group is EPD, which satisfies the following conditions: TL/ImgH<3.0; 0.25<f/f12 <1.5; f6/f<-1.0; 1.60<Nmax<1.70; Td/EPD≦2.37. The imaging optical lens unit according to claim 1, wherein the focal length of the imaging optical lens group is f, and the combined focal length of the first lens and the second lens is f12, which satisfies the following condition: 0.25<f/f12≦1.07 . The imaging optical lens unit of claim 1, wherein the second lens has a negative refractive power. The imaging optical lens unit according to claim 1, wherein the fifth lens object side surface is a concave surface at a near optical axis, and the fifth lens image side surface is convex at a near optical axis. The imaging optical lens unit of claim 1, wherein the first lens has a dispersion coefficient of V1, the second lens has a dispersion coefficient of V2, the fifth lens has a dispersion coefficient of V5, and the sixth lens has a dispersion coefficient. It is V6, which satisfies the following condition: 1.5 < (V1 + V2) / (V5 + V6) < 3.0. The imaging optical lens unit according to claim 1, wherein a distance from the first lens object side surface to the imaging surface on the optical axis is TL, and a maximum imaging height of the imaging optical lens group is 1 mgH, which satisfies the following conditions: TL/ImgH < 2.2. The imaging optical lens unit according to claim 1, wherein a focal length of the imaging optical lens group is f, a focal length of the sixth lens is f6, and a focal length of the seventh lens is f7, which satisfies the following condition: -1.8<( f/f6)+(f/f7)<-0.5. The imaging optical lens unit according to claim 1, wherein a distance from the side surface of the seventh lens image to the imaging surface on the optical axis is BF, and a focal length of the imaging optical lens group is f, which satisfies the following conditions: BF/f < 0.35. The imaging optical lens unit according to claim 1, wherein the sixth lens image side surface has at least one concave surface at an off-axis. The imaging optical lens unit according to claim 1, wherein a distance from the first lens object side surface to the seventh lens image side surface on the optical axis is Td, and an entrance pupil aperture of the imaging optical lens group is EPD, The following conditions are met: Td/EPD ≦ 2.29. The imaging optical lens unit according to claim 10, wherein a distance from the first lens object side surface to the seventh lens image side surface on the optical axis is Td, and an entrance pupil aperture of the imaging optical lens group is EPD, The following conditions are met: Td/EPD ≦ 2.24. The imaging optical lens unit according to claim 11, wherein a distance from the first lens object side surface to the seventh lens image side surface on the optical axis is Td, and an entrance pupil aperture of the imaging optical lens group is EPD, The following conditions are met: Td/EPD≦2.21. The imaging optical lens group according to claim 1, wherein the sixth lens has a dispersion coefficient of V6, which satisfies the following condition: 10 < V6 < 32. The imaging optical lens unit according to claim 1, wherein a focal length of the imaging optical lens group is f, and a radius of curvature of the seventh lens image side surface is R14, which satisfies the following condition: 0.20 < R14 / f < 0.60. The imaging optical lens unit of claim 1, wherein the sixth lens is on the optical axis The thickness is CT6, and the thickness of the seventh lens on the optical axis is CT7, which satisfies the following condition: 0.75 < CT6 / CT7 < 1.33. The imaging optical lens unit according to claim 1, wherein the imaging optical lens group has an aperture value of Fno, which satisfies the following condition: Fno<2.0. The imaging optical lens unit of claim 1, wherein a sum of lens thicknesses of the first lens to the seventh lens on the optical axis is ΣCT, the first lens object side surface to the seventh lens image side surface The distance on the optical axis is Td, which satisfies the following condition: 0.60 < Σ CT / Td < 0.85. The imaging optical lens unit of claim 1, further comprising: an aperture, wherein the aperture is disposed between a subject and the second lens object side surface. The imaging optical lens unit of claim 18, wherein the aperture is disposed between the subject and the first lens object side surface. An imaging device comprising: the imaging optical lens group according to claim 1; and an electronic photosensitive element, wherein the electronic photosensitive element is disposed on the imaging surface of the imaging optical lens group. An electronic device comprising: the image capture device of claim 20.