TWI747731B - Optical imaging lens, imaging device, and electronic device - Google Patents

Abstract

An optical imaging lens includes, from an object side to an image side, a first lens having negative refractive power and including an object-side surface being convex and an image-side surface being concave, a second lens having negative refractive power and including an object-side being convex and an image-side surface being concave, a third lens having negative refractive power and including an object-side surface being concave and an image-side surface being convex, a fourth lens having positive refractive power and including an object-side surface being convex, a fifth lens having positive refractive power and including an object-side surface being convex and an image-side surface being convex, a sixth lens having negative refractive power and including an object-side surface being concave and an image-side surface being convex, and a seventh lens having positive refractive power and including an object-side surface being convex and an image-side surface being concave. The optical imaging lens includes a total of seven elements.

Description

Optical image capturing lens group, imaging device and electronic device

The present invention relates to an optical image capturing lens group and an imaging device, in particular to an optical image capturing lens group, an imaging device and an electronic device suitable for an automotive photographic electronic device or a surveillance camera system.

With the continuous advancement of semiconductor process technology, the pixels of the image sensor element can reach a smaller size, and the performance has been significantly improved. Therefore, an optical lens with high imaging quality has become an indispensable part of electronic camera devices.

With the diversified development of electronic camera devices, their applications have become more and more extensive, such as advanced driver assistance systems (ADAS), driving recorders, home surveillance camera equipment, smart phones and human-computer interaction devices, etc., optical lens design The requirements are also more diverse. In terms of vehicle photography devices, in order to clearly recognize the obstacles around the vehicle or the oncoming vehicles on both sides, the resolution and brightness of the optical lens need to be improved, and at the same time, it is required to have a high degree of adaptability to the ambient temperature. In addition, in order to properly correct various aberrations, especially for distance measurement or object recognition purposes, if there is a large distortion in the captured image, errors are likely to occur when calculating the distance or image recognition.

Therefore, how to design an optical imaging device to achieve a balance between miniaturization, high resolution, and good optical imaging quality has become the goal of this technical field.

Therefore, in order to solve the above-mentioned problems, the present invention provides an optical image capturing lens assembly, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, an aperture, a fifth lens, and a lens from the object side to the image side. The sixth lens and the seventh lens. Among them, the first lens has negative refractive power, the object side is convex, and the image side is concave; the second lens has negative refractive power, the object side is convex, and the image side is concave; the third lens has negative refractive power, and its object The side surface is concave and the image side surface is convex; the fourth lens has positive refractive power, and its object side is convex; the fifth lens has positive refractive power, its object side is convex, and the image side is convex; the sixth lens has negative refractive power , The object side is concave, and the image side is convex, wherein the fifth lens and the sixth lens form a cemented lens; the seventh lens has positive refractive power, the object side is convex, and the image side is concave; among them, optical The total number of lenses in the image capturing lens group is seven; among them, the focal length of the first lens is f1, and the focal length of the third lens is f3, which satisfies the following relationship: 0.95<f3/f1<6.2.

According to an embodiment of the present invention, the distance from the image side of the fourth lens to the object side of the fifth lens on the optical axis is AT45, and the focal length of the overall optical image capturing lens group is EFL, which satisfies the following relationship: 0.4< AT45/EFL<1.3.

According to an embodiment of the present invention, the focal length of the first lens is f2, and the focal length f3 of the third lens satisfies the following relationship: 2.9<f3/f2<7.

The present invention also provides an optical image capturing lens group, which includes a first lens, a second lens, a third lens, a fourth lens, an aperture, a fifth lens, a sixth lens, and a seventh lens in sequence from the object side to the image side . Among them, the first lens has negative refractive power, the object side is convex, and the image side is concave; the second lens has negative refractive power, the object side is convex, and the image side is concave; the third lens has negative refractive power, and its object The side surface is concave and the image side surface is convex; the fourth lens has positive refractive power, and its object side surface is convex; the fifth lens has positive refractive power, its object side surface is convex, and the image side surface is convex; the sixth lens has positive refractive power. It has negative refractive power, the object side is concave, and the image side is convex. Among them, the fifth lens and the sixth lens form a cemented lens; the seventh lens has positive refractive power, and the object side is convex and the image side is concave; , The total number of lenses in the optical image capturing lens group is seven; among them, the focal length of the second lens is f2, the focal length of the third lens is f3, and the distance between the image side of the sixth lens and the object side of the seventh lens on the optical axis is AT67, the curvature radius of the seventh lens object side is R13, which satisfies the following relationship: 2.9<f3/f2<7; and 0.1<AT67/R13<0.6.

According to an embodiment of the present invention, the focal length of the fourth lens is f4, and the effective focal length EFL of the optical image capturing lens group satisfies the following relationship: 2<f4/EFL<3.5.

According to an embodiment of the present invention, the combined focal length of the fifth lens and the sixth lens is f56, and the effective focal length EFL of the overall optical image capturing lens group satisfies the following relationship: 2.7<f56/EFL <7.5.

According to an embodiment of the present invention, the radius of curvature of the image side surface of the fifth lens is R10, and the relationship between it and the effective focal length EFL of the overall optical image capturing lens group satisfies the following relationship: -1.5<R10/EFL< -0.9.

According to an embodiment of the present invention, the distance from the aperture to the imaging surface of the optical image capturing lens group on the optical axis is SL, and the object side of the first lens to the imaging surface of the optical image capturing lens group is in the optical axis. The distance on the axis is TTL, and the relationship between the two is satisfied: 0.4<SL/TTL<0.7.

According to an embodiment of the present invention, the radius of curvature of the object side surface of the first lens is R1 and the radius of curvature of the image side surface is R2, which satisfies the following relationship: 1.3<R1/R2<3.2.

According to an embodiment of the present invention, the radius of curvature of the object side of the first lens is R1, the radius of curvature of the image side of the second lens is R4, and the effective focal length of the overall optical image capturing lens group is EFL, which satisfies the following relationship : 0.8<EFL/R1+EFL/R4<1.4.

According to an embodiment of the present invention, the total thickness of the first lens to the seventh lens on the optical axis is ΣCT, and the distance from the object side of the first lens to the image side of the seventh lens on the optical axis is Dr1r14, which satisfies the following Relational formula: 0.4<ΣCT/Dr1r14<0.65.

According to an embodiment of the present invention, the distance from the object side of the first lens to the imaging surface of the optical image capturing lens group on the optical axis is TTL, and the maximum image height of the optical image capturing lens group on the imaging surface is ImgH , The system satisfies the following relationship: 4<TTL/ImgH<7.5.

According to an embodiment of the present invention, the dispersion coefficient of the fifth lens is Vd5, and the dispersion coefficient of the sixth lens is Vd6, which satisfies the following relationship: Vd5>Vd6.

According to an embodiment of the present invention, the dispersion coefficient of the fourth lens is Vd4, which satisfies the following relationship: Vd4<45.

According to an embodiment of the present invention, the optical image capturing lens group includes at least two lenses with a refractive index greater than or equal to 1.7.

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

The present invention further provides an electronic device, which includes the aforementioned imaging device.

100, 200, 300, 400, 500, 600, 700, 800: optical image capture lens group

101, 201, 301, 401, 501, 601, 701, 801: first lens

102, 202, 302, 402, 502, 602, 702, 802: second lens

103, 203, 303, 403, 503, 603, 703, 803: third lens

104, 204, 304, 404, 504, 604, 704, 804: fourth lens

105, 205, 305, 405, 505, 605, 705, 805: fifth lens

106, 206, 306, 406, 506, 606, 706, 806: sixth lens

107, 207, 307, 407, 507, 607, 707, 807: seventh lens

108, 208, 308, 408, 508, 608, 708, 808: filter element

109, 209, 309, 409, 509, 609, 709, 809: protective glass

110, 210, 310, 410, 510, 610, 710, 810: imaging surface

101a, 201a, 301a, 401a, 501a, 601a, 701a, 801a: the object side of the first lens

101b, 201b, 301b, 401b, 501b, 601b, 701b, 801b: the image side of the first lens

102a, 202a, 302a, 402a, 502a, 602a, 702a, 802a: the object side of the second lens

102b, 202b, 302b, 402b, 502b, 602b, 702b, 802b: the image side of the second lens

103a, 203a, 303a, 403a, 503a, 603a, 703a, 803a: the object side of the third lens

103b, 203b, 303b, 403b, 503b, 603b, 703b, 803b: the image side of the third lens

104a, 204a, 304a, 404a, 504a, 604a, 704a, 804a: the object side of the fourth lens

104b, 204b, 304b, 404b, 504b, 604b, 704b, 804b: the image side of the fourth lens

105a, 205a, 305a, 405a, 505a, 605a, 705a, 805a: the object side of the fifth lens

105b, 205b, 305b, 405b, 505b, 605b, 705b, 805b: the image side of the fifth lens

106a, 206a, 306a, 406a, 506a, 606a, 706a, 806a: the object side of the sixth lens

106b, 206b, 306b, 406b, 506b, 606b, 706b, 806b: the image side of the sixth lens

107a, 207a, 307a, 407a, 507a, 607a, 707a, 807a: the object side of the seventh lens

107b, 207b, 307b, 407b, 507b, 607b, 707b, 807b: the image side of the seventh lens

108a, 108b, 208a, 208b, 308a, 308b, 408a, 408b, 508a, 508b, 608a, 608b, 708a, 708b, 808a, 708b: the second surface of the filter element

109a, 109b, 209a, 209b, 309a, 309b, 409a, 409b, 509a, 509b, 609a, 609b, 709a, 709b, 809a, 809b: protective glass two surface

120, 220, 320, 420, 520, 620, 720, 820: image sensor

1000: Electronic device

1010: imaging device

I: Optical axis

ST: Aperture

[Fig. 1A] is a schematic diagram of the optical image capturing lens group of the first embodiment of the present invention; [Fig. 1B] is the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram and the diagram from left to right of the first embodiment of the present invention. Distortion aberration map; [Fig. 2A] is a schematic diagram of the optical image capturing lens group according to the second embodiment of the present invention; [Fig. 2B] is the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram and the diagram from left to right of the second embodiment of the present invention in order Distortion aberration diagram; [FIG. 3A] is a schematic diagram of the optical image capturing lens group of the third embodiment of the present invention; [FIG. 3B] is the longitudinal spherical aberration diagram and astigmatic field of the third embodiment of the present invention in order from left to right Curved aberration diagram and distortion diagram; [FIG. 4A] is a schematic diagram of the optical image capturing lens group of the fourth embodiment of the present invention; [FIG. 4B] is the longitudinal ball of the fourth embodiment of the present invention in order from left to right Aberration diagram, astigmatic field curvature aberration diagram, and distortion aberration diagram; [FIG. 5A] is a schematic diagram of the optical image capturing lens group of the fifth embodiment of the present invention; [FIG. 5B] is the fifth embodiment of the present invention in order from left to right The longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the embodiment; [FIG. 6A] is a schematic diagram of the optical image capturing lens group of the sixth embodiment of the present invention; [FIG. 6B] Sequentially from left to right It is the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the sixth embodiment of the present invention; [FIG. 7A] is a schematic diagram of the optical image capturing lens group of the seventh embodiment of the present invention; [FIG. 7B] From left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the seventh embodiment of the present invention in sequence; [FIG. 8A] is a schematic diagram of the optical image capturing lens group of the eighth embodiment of the present invention; [FIG. 8B] From left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the eighth embodiment of the present invention; and [FIG. 9] is the electronic device of the tenth embodiment of the present invention The schematic diagram.

In the following embodiments, each lens of the optical image capturing lens group can be made of glass or plastic, and is not limited to the materials listed in the embodiments. When the lens material is glass, the lens surface can be processed by grinding or molding; in addition, due to the temperature change and high hardness of the glass material itself, the impact of environmental changes on the optical image capturing lens group can be reduced, thereby extending The service life of the optical image capturing lens group. When the lens material is plastic, it is beneficial to reduce the weight of the optical image capturing lens group and reduce the production cost.

In the embodiment of the present invention, each lens includes an object side facing the object and an image side facing the imaging surface. The surface shape of each lens is defined according to the shape of the area near the optical axis (paraxial) of the surface. For example, when the object side of a lens is described as convex, it means that the object side of the lens near the optical axis is convex. That is, although the lens surface is described as a convex surface in the embodiment, the surface may be convex or concave in the region away from the optical axis (off-axis). The shape of each lens near the axis is judged by the positive or negative curvature radius of the surface. For example, if the curvature radius of the object side surface of a lens is positive, the object side surface is convex; otherwise, if it is If the radius of curvature is negative, the side surface of the object is concave. As for the image side surface of a lens, if its radius of curvature is positive, the image side surface is concave; conversely, if its radius of curvature is negative, the image side surface is convex.

In the embodiment of the present invention, the object side surface and the image side surface of each lens may be spherical or aspherical surfaces. The use of an aspheric surface on the lens helps correct the imaging aberrations of the optical image capturing lens group such as spherical aberration and reduces the number of optical lens components used. However, the use of an aspheric lens increases the cost of the overall optical image capturing lens group. Although in the embodiments of the present invention, the surface of some optical lenses uses a spherical surface, it can still be designed as an aspheric surface if necessary; or, the surface of some optical lenses uses an aspheric surface, but it can still be designed as needed. Design it as a spherical surface.

In the embodiment of the present invention, the total track length (TTL) of the optical image capturing lens group is defined as the distance from the object side of the first lens of the optical image capturing lens group to the imaging surface on the optical axis. The imaging height of this optical image capturing lens group is called the maximum image height ImgH (Image Height); when an image sensor element is set on the imaging surface, the maximum image height ImgH represents the diagonal of the effective sensing area of the image sensor element Half the length. In the following embodiments, the units of curvature radius of all lenses, lens thickness, distance between lenses, total lens group length TTL, maximum image height ImgH, and focal length (Focal Length) are all expressed in millimeters (mm).

The invention provides an optical image capturing lens group, which includes a first lens, a second lens, a third lens, a fourth lens, an aperture, a fifth lens, a sixth lens, and a seventh lens in sequence from the object side to the image side. Among them, the first lens has negative refractive power, the object side is convex, and the image side is concave; the second lens has negative refractive power, the object side is convex, and the image side is concave; the third lens has negative refractive power , The object side is concave and the image side is convex; the fourth lens has positive refractive power, and the object side is convex; the fifth lens has positive refractive power, the object side is convex, and the image side is convex; the sixth lens , Has negative refractive power, the object side is concave, the image side is convex, wherein the fifth lens and the sixth lens form a cemented lens; the seventh lens has negative refractive power, its object side is convex, and the image side is concave ; The total number of lenses in this optical image capturing lens group is seven.

The first lens has a negative refractive power, and its object side surface is a convex surface and the image side surface is a concave surface, which is conducive to forming a wide viewing angle structure and increasing the light collection range of the optical image capturing lens group.

The second lens also has negative refractive power. The object side is convex and the image side is concave, which helps correct aberrations caused by incident light at a large angle. By continuously arranging two negative lenses at the front end of the lens group, you can The optical image capturing lens group has an appropriate back focal length to prevent the back focal length from being too long, resulting in an increase in the volume of the overall optical image capturing lens group, which is not conducive to miniaturization.

The third lens has a negative refractive power, the object side surface is a concave surface, and the image side surface is a convex surface, wherein the negative refractive power of the third lens is lower than that of the first lens and the second lens. With the concave surface on the object side of the third lens corresponding to the concave surface on the image side of the second lens, the transmission direction of the large-angle light can be further changed, the angle between the light and the optical axis can be reduced, and the imaging aberration can be reduced.

The fourth lens has positive refractive power, and its object side surface is convex. The light divergence formed by the negative refractive power of the first lens, the second lens and the third lens, and the light converging effect of the fourth lens with positive refractive power can effectively reduce the spherical image of the optical image capturing lens group Difference.

The fifth lens has a positive refractive power, the object side is convex, and the image side is convex. The sixth lens has negative refractive power, its object side is concave, and the image side is convex. The fifth lens and the sixth lens are bonded to each other to form a cemented lens. The cemented lens can help correct the chromatic aberration of the optical image capturing lens group.

The seventh lens has positive refractive power, its object side surface is convex, and the image side surface is concave. The object side surface of the seventh lens is opposite to the convex surface of the image side surface of the sixth lens, which helps to correct the curvature of field aberration of the optical image capturing lens group.

The focal length of the first lens of the optical image capturing lens group is f1, and the focal length of the third lens is f3, which satisfies the following relationship: 0.95<f3/f1<6.2; (1)

By satisfying the condition of relation (1), the ratio of refractive power between the first lens and the third lens can be controlled. If f3/f1 is lower than the lower limit of the relational formula (1), the negative refractive power of the first lens will be insufficient, which will reduce the light-receiving range of the optical image capturing lens group, making it difficult to form a wide viewing angle structure; if f3/f1 is high The upper limit value of relation (1) will increase the length of the back focus BFL, and it is not conducive to correcting aberrations.

Preferably, the distance on the optical axis from the image side surface of the fourth lens to the object side surface of the fifth lens of the optical image capturing lens group is AT45, and the focal length of the overall optical image capturing lens group is EFL, which satisfies the following relationship Formula: 0.4<AT45/EFL<1.3; (2)

By satisfying the condition of relational expression (2), the fourth lens and the fifth lens that also have positive refractive power can be symmetrically arranged on both sides of the aperture, and an appropriate distance between the two lenses can be maintained to facilitate correction of aberrations.

The focal length of the first lens of the optical image capturing lens group is f2, and the focal length of the third lens is f3, which satisfies the following relationship: 2.9<f3/f2<7; (3)

By satisfying the condition of relation (3), the ratio of refractive power between the second lens and the third lens can be controlled. If f3/f2 is lower than the lower limit of the relationship (1), the negative refractive power of the second lens of the optical image capturing lens group is likely to be too low, which is not conducive to guiding the light toward the optical axis; if f3/f2 is higher than the relation The upper limit of the formula (1) means that the negative refractive power of the third lens is too low, which reduces the effect of the third lens with the fourth lens to correct aberrations.

Preferably, the distance on the optical axis from the image side surface of the sixth lens to the object side surface of the seventh lens of the optical image capturing lens group is AT67, and the radius of curvature of the object side surface of the seventh lens is R13, which satisfies the following relationship: 0.1<AT67/R13<0.6; (4)

By satisfying the condition of relation (4), it is helpful to maintain an appropriate distance between the sixth lens and the seventh lens. The lens surface shape and air gap between the sixth lens and the seventh lens are used to Correct the aberration of the optical image capturing lens group.

The focal length of the fourth lens of the optical image capturing lens group is f4, and the effective focal length EFL of the overall optical image capturing lens group satisfies the following relationship: 2<f4/EFL<3.5; (5)

By satisfying the condition of relation (5), it is beneficial to reduce the volume of the optical image capturing lens group while maintaining good optical performance. If f4/EFL is lower than the lower limit of the relationship (5), the positive refractive power of the fourth lens is too large, and the distance between the fourth lens and the imaging surface is likely to be too short, which is not conducive to arranging the rear lens group; if f4 /EFL is higher than the upper limit of the relationship (5), the positive refractive power of the fourth lens is insufficient, and it is difficult to balance the negative refractive power of the first lens, the second lens, and the third lens.

The combined focal length of the fifth lens and the sixth lens of the optical image capturing lens group is f56, and the effective focal length EFL of the optical image capturing lens group satisfies the following relationship: 2.7<f56/EFL<7.5 ; (6)

By satisfying the condition of relation (6), the cemented lens composed of the fifth lens and the sixth lens can have proper positive refractive power, which is beneficial to reduce chromatic aberration.

The radius of curvature of the image side surface of the fifth lens of the optical image capturing lens group is R10, and the relationship between it and the effective focal length EFL of the optical image capturing lens group satisfies the following relationship: -1.5<R10/EFL<-0.9 ; (7)

By satisfying the condition of relational formula (7), the bonding surface of the fifth lens and the sixth lens can be controlled to have an appropriate radius of curvature, which is also beneficial to reduce chromatic aberrations.

The distance from the aperture of the optical image capturing lens group to the imaging surface of the optical image capturing lens group on the optical axis is SL, the distance from the object side of the first lens to the imaging surface of the optical image capturing lens group on the optical axis It is TTL, which satisfies the following relationship: 0.4<SL/TTL<0.7; (8)

By satisfying the condition of relational expression (8), the aperture can be set at an appropriate position in the optical image capturing lens group, which is beneficial to reduce the distortion aberration of the optical image capturing lens group.

The curvature radius of the object side surface of the first lens of the optical image capturing lens group is R1, and the curvature radius of the image side surface is R2, which satisfies the following relationship: 1.3<R1/R2<3.2; (9)

By satisfying the condition of relation (9), it is beneficial to expand the light receiving range and improve the imaging angle of view.

The curvature radius of the first lens object side of the optical image capturing lens group is R1, and the curvature radius of the second lens image side is R4, which satisfies the following relationship: 0.8<EFL/R1+EFL/R4<1.4; ( 10)

By satisfying the condition of relational expression (10), it is advantageous to control the shape of the object side surface of the first lens and the image side surface of the second lens, so as to expand the viewing angle and reduce the imaging aberration.

The total thickness of the first lens to the seventh lens of the optical image capturing lens group on the optical axis is ΣCT, and the distance from the object side of the first lens to the image side of the seventh lens on the optical axis is Dr1r14, which is Satisfy the following relationship: 0.4<ΣCT/Dr1r14<0.65; (11)

By satisfying the condition of relation (11), it can be used to adjust the total thickness of the first lens to the seventh lens on the optical axis and the distance between the object side of the first lens and the image side of the seventh lens on the optical axis. 1. Appropriate proportions.

The distance from the object side of the first lens of the optical image capturing lens group to the imaging surface of the optical image capturing lens group on the optical axis is TTL, and the maximum image height of the optical image capturing lens group on the imaging surface is ImgH , The system satisfies the following relationship: TTL/ImgH<7.5; (12)

By satisfying the condition of relation (12), it is beneficial to reduce the total length of the optical image capturing lens group.

The dispersion coefficient of the fifth lens of the optical image capturing lens group is Vd5, and the dispersion coefficient of the sixth lens is Vd6, which satisfies the following relationship: Vd5>Vd6; (13)

By satisfying the condition of relation (13), the positive lens material of the cemented lens of the optical image capturing lens group can have lower dispersion characteristics, and the negative lens material has higher dispersion transmittance, thereby further reducing optical The chromatic aberration of the image capturing lens group.

The dispersion coefficient of the fourth lens of the optical image capturing lens group is Vd4, which satisfies the following relationship: Vd4<45; (14)

The optical image capturing lens group includes at least two lenses with a refractive index greater than or equal to 1.7, which is beneficial to reduce the imaging aberration of the optical image capturing lens group.

The first embodiment

1A and 1B, FIG. 1A is a schematic diagram of the optical image capturing lens group according to the first embodiment of the present invention. FIG. 1B shows the longitudinal spherical aberration map (Longitudinal Spherical Aberration), the astigmatism field curvature map (Astigmatism/Field Curvature) and the distortion aberration map (Distortion) in order from left to right of the first embodiment of the present invention.

As shown in FIG. 1A, the optical image capturing lens group 100 of the first embodiment includes a first lens 101, a second lens 102, a third lens 103, a fourth lens 104, an aperture ST, The fifth lens 105, the sixth lens 106, and the seventh lens 107. The optical image capturing lens group 100 may further include a filter element 108, a protective glass 109, and an imaging surface 110. An image sensing element 120 can be further provided on the imaging surface 110 to form an imaging device (not marked separately).

The first lens 101 has a negative refractive power, the object side surface 101a is convex, the image side surface 101b is concave, and the object side surface 101a and the image side surface 101b are spherical surfaces. The material of the first lens 101 is glass.

The second lens 102 has a negative refractive power, the object side 102a is convex, the image side 102b is concave, and both the object side 102a and the image side 102b are spherical surfaces. The material of the second lens 102 is glass.

The third lens 103 has a negative refractive power, the object side surface 103a is concave, the image side surface 103b is convex, and both the object side surface 103a and the image side surface 103b are aspherical. The material of the third lens 103 is plastic.

The fourth lens 104 has a positive refractive power, its object side surface 104a is convex, its image side surface 104b is convex, and its object side surface 104a and image side surface 104b are spherical surfaces. The material of the fourth lens 104 is glass.

The fifth lens 105 has a positive refractive power, the object side surface 105a is convex, the image side surface 105b is convex, and the object side surface 105a and the image side surface 105b are spherical surfaces. The material of the fifth lens 105 is glass.

The sixth lens 106 has a negative refractive power, its object side surface 106a is concave, its image side surface 106b is convex, and its object side surface 106a and image side surface 106b are spherical surfaces. The material of the sixth lens 106 is glass. The image side surface 105b of the fifth lens 105 and the object side surface 106a of the sixth lens 106 have the same radius of curvature, and are bonded to each other to form a cemented lens.

The seventh lens 107 has a positive refractive power, the object side surface 107a is convex, the image side surface 107b is concave, and the object side surface 107a and the image side surface 107b are both aspherical. The material of the seventh lens 107 is plastic.

The filter element 108 is disposed between the seventh lens 107 and the imaging surface 110 to filter out light in a specific wavelength range, for example, an infrared filter (IR Filter). The two surfaces 108a and 108b of the filter element 108 are both flat surfaces, and the material is glass.

The protective glass 109 is disposed on the image sensing element 120, and its two surfaces 109a, 109b are both flat surfaces, and its material is glass.

The image sensor (Image Sensor) 120 is, for example, a charge-coupled device (CCD) Image Sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The curve equation of each aspheric surface mentioned above is expressed as follows:

Among them, X: the distance between the point Y on the aspheric surface from the optical axis and the tangent surface of the aspheric surface on the optical axis; Y: the vertical distance between the point on the aspheric surface and the optical axis; R: the lens at the near optical axis The radius of curvature of; K: the conical coefficient; and Ai: the i-th aspheric coefficient.

Please refer to Table 1 below, which is the detailed optical data of the optical image capturing lens group 100 according to the first embodiment of the present invention. Wherein, the object side surface 101a of the first lens 101 is designated as the surface 101a, the image side surface 101b is designated as the surface 101b, and the other lens surfaces are deduced by analogy. The value in the distance column in the table represents the distance from the surface to the next surface on the optical axis I. For example, the distance from the object side 101a to the image side 101b of the first lens 101 is 0.5 mm, which means that the first lens 101 is on the optical axis. The thickness is 0.5mm. The distance from the image side 101b of the first lens 101 to the object side 102a of the second lens 102 is 1.4 mm. Others can be deduced by analogy, and will not be repeated below.

In the first embodiment, the effective focal length of the optical image capturing lens group 100 is EFL, the aperture value (F-number) is Fno, and half of the maximum angle of view of the overall optical image capturing lens group 100 is HFOV (Half Field of View). The distance from the object side 101a of the first lens 101 to the imaging surface 110 on the optical axis I is the total length TTL, and its values are as follows: EFL=2.36mm, Fno=1.5, TTL=19.54mm, HFOV=85 degrees. The tables in the following embodiments correspond to the optical image capturing lens groups of the embodiments, and the definitions of the tables are the same as in this embodiment, so they will not be repeated in the following embodiments.

Please refer to Table 2 below, which is the aspheric coefficient of each surface of each lens of the first embodiment of the present invention. Among them, K is the conical coefficient in the aspheric curve equation, and A2 to A14 represent the 2nd to 14th order aspheric coefficients of each surface. For example, the conical coefficient K of the object side surface 103a of the third lens 103 is -0.225. Others can be deduced by analogy, and will not be repeated below. In addition, the tables in the following embodiments correspond to the optical image capturing lens groups of the embodiments, and the definitions of the tables are the same as in this embodiment, so they will not be repeated in the following embodiments.

In the first embodiment, the relationship between the focal length f1 of the first lens 101 and the focal length f3 of the third lens 103 is f3/f1=2.35.

In the first embodiment, the relationship between the distance AT45 from the image side 104b of the fourth lens 104 to the object side 105a of the fifth lens 105 on the optical axis and the effective focal length EFL of the overall optical image capturing lens group 100 is AT45 /EFL=0.96.

In the first embodiment, the relationship between the focal length f2 of the second lens 102 and the focal length f3 of the third lens 103 is f3/f2=3.08.

In the first embodiment, the relationship between the distance AT67 from the image side surface 106b of the sixth lens 106 to the object side surface 107a of the seventh lens 107 on the optical axis and the curvature radius R13 of the object side surface of the seventh lens 107 is AT67/R13=0.28.

In the first embodiment, the relationship between the focal length f4 of the fourth lens 104 and the effective focal length EFL of the overall optical image capturing lens group 100 is f4/EFL=2.53.

In the first embodiment, the relationship between the combined focal length f56 of the cemented lens formed by the fifth lens 105 and the sixth lens 106 and the effective focal length EFL of the overall optical image capturing lens group 100 is f56/EFL=6.96.

In the first embodiment, the relationship between the radius of curvature R10 of the image side surface 105b of the fifth lens 105 and the effective focal length EFL of the overall optical image capturing lens group 100 is R10/EFL=-1.23.

In the first embodiment, the distance SL from the aperture ST of the optical image capturing lens group 100 to the imaging surface 110 on the optical axis is the same as the object side surface 101a of the first lens 101 to the imaging surface 110 of the optical image capturing lens group 100 For the distance TTL on the optical axis, the relationship between the two is SL/TTL=0.53.

In the first embodiment, the relationship between the radius of curvature R1 of the object side surface 101a of the first lens 101 and the radius of curvature R2 of the image side surface 101b is R1/R2=2.35.

In the first embodiment, the radius of curvature R1 of the object side 101a of the first lens 101, the radius of curvature of the image side 102b of the second lens 102 is R4, and the effective focal length of the optical image capturing lens group 100 is between EFL The relationship of EFL/R1+EFL/R4=1.06.

In the first embodiment, the total thickness ΣCT of the first lens 101 to the seventh lens 107 on the optical axis is the distance Dr1r14 from the object side 101a to the seventh lens 107b of the first lens 101 to the image side 107b on the optical axis, The relationship between the two is ΣCT/Dr1r14=0.52.

In the first embodiment, the distance TTL from the object side 101a of the first lens 101 to the imaging surface 110 of the optical image capturing lens group 100 on the optical axis is TTL, and the optical image capturing lens group 100 is on the imaging surface 110 The relationship between the maximum image height ImgH is TTL/ImgH=6.07.

In the first embodiment, the dispersion coefficients of the fifth lens 105 and the sixth lens 106 are Vd5=51.1 and Vd6=17.5, respectively.

In the first embodiment, the dispersion coefficient of the fourth lens 104 is Vd4=28.3.

In the first embodiment, the refractive indexes of the first lens 101, the second lens 102, the fourth lens 104, the fifth lens 105, and the sixth lens 106 of the optical image capturing lens group 100 are all greater than 1.7.

It can be seen from the values of the above relational expressions that the optical image capturing lens assembly 100 of the first embodiment satisfies the requirements of the relational expressions (1) to (14), and satisfies the condition of including at least two lenses with a refractive index greater than or equal to 1.7.

1B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 100, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. From the astigmatic field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.02mm; and the distortion aberration can be controlled within 10%. As shown in FIG. 1B, the optical image capturing lens assembly 100 of the present embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Second embodiment

2A and 2B, FIG. 2A is a schematic diagram of an optical image capturing lens assembly according to a second embodiment of the present invention. Fig. 2B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the second embodiment of the present invention in order from left to right.

As shown in FIG. 2A, the optical image capturing lens group 200 of the second embodiment includes a first lens 201, a second lens 202, a third lens 203, a fourth lens 204, an aperture ST, The fifth lens 205, the sixth lens 206, and the seventh lens 207. The optical image capturing lens group 200 can further include a filter element 208, a protective glass 209, and an imaging surface 210. An image sensing element 220 can be further provided on the imaging surface 210 to form an imaging device (not shown).

The first lens 201 has a negative refractive power, the object side surface 201a is convex, the image side surface 201b is concave, and the object side surface 201a and the image side surface 201b are spherical surfaces. The material of the first lens 201 is glass.

The second lens 202 has a negative refractive power, the object side surface 202a is convex, the image side surface 202b is concave, and the object side surface 202a and the image side surface 202b are spherical surfaces. The material of the second lens 202 is glass.

The third lens 203 has a negative refractive power, the object side surface 203a is concave, the image side surface 203b is convex, and both the object side surface 203a and the image side surface 203b are aspherical. The material of the third lens 203 is plastic.

The fourth lens 204 has a positive refractive power, its object side surface 204a is convex, its image side surface 204b is convex, and its object side surface 204a and image side surface 204b are spherical surfaces. The material of the fourth lens 204 is glass.

The fifth lens 205 has a positive refractive power, the object side surface 205a is convex, the image side surface 205b is convex, and both the object side surface 205a and the image side surface 205b are spherical surfaces. The material of the fifth lens 205 is glass.

The sixth lens element 206 has negative refractive power, its object side surface 206a is concave, its image side surface 206b is convex, and its object side surface 206a and image side surface 206b are spherical surfaces. The material of the sixth lens 206 is glass. Wherein, the image side surface 205b of the fifth lens 205 and the object side surface 206a of the sixth lens 206 have the same radius of curvature, and are bonded to each other to form a cemented lens.

The seventh lens 207 has positive refractive power, the object side surface 207a is convex, the image side surface 207b is concave, and the object side surface 207a and the image side surface 207b are both aspherical. The material of the seventh lens 207 is plastic.

The filter element 208 is disposed between the seventh lens 207 and the imaging surface 210 to filter out light in a specific wavelength range, for example, an infrared filter (IR Filter). Both surfaces 208a and 208b of the filter element 208 are flat surfaces, and the material is glass.

The protective glass 209 is disposed on the image sensor 220, and its two surfaces 209a, 209b are both flat surfaces, and its material is glass.

The Image Sensor 220 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a CMOS Image Sensor.

The detailed optical data and the aspheric coefficients of the lens surface of the optical image capturing lens group 200 of the second embodiment are listed in Table 3 and Table 4, respectively. In the second embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the second embodiment, the numerical values of the relational expressions of the optical image capturing lens group 200 are listed in Table 5. It can be seen from Table 5 that the optical image capturing lens group 200 of the second embodiment satisfies the relationship (1) To the requirements of (14), and from Table 3, it can be seen that the optical image capturing lens group 200 satisfies the condition of including at least two lenses with a refractive index greater than or equal to 1.7.

2B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 200, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.03mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.02mm; and the distortion aberration can be controlled within 2%. As shown in FIG. 2B, the optical image capturing lens assembly 200 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

The third embodiment

Referring to FIGS. 3A and 3B, FIG. 3A is a schematic diagram of an optical image capturing lens group according to a third embodiment of the present invention. FIG. 3B shows the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), the astigmatism field curvature (Astigmatism/Field Curvature) and the distortion aberration diagram (Distortion) of the third embodiment of the present invention in order from left to right.

As shown in FIG. 3A, the optical image capturing lens group 300 of the third embodiment includes a first lens 301, a second lens 302, a third lens 303, a fourth lens 304, an aperture ST, The fifth lens 305, the sixth lens 306, and the seventh lens 307. The optical image capturing lens group 300 may further include a filter element 308, a protective glass 309, and an imaging surface 310. An image sensing element 320 can be further provided on the imaging surface 310 to form an imaging device (not shown).

The first lens 301 has a negative refractive power, the object side surface 301a is convex, the image side surface 301b is concave, and both the object side surface 301a and the image side surface 301b are spherical surfaces. The material of the first lens 301 is glass.

The second lens 302 has a negative refractive power, the object side surface 302a is convex, the image side surface 302b is concave, and both the object side surface 302a and the image side surface 302b are spherical surfaces. The material of the second lens 302 is glass.

The third lens 303 has a negative refractive power, the object side surface 303a is concave, the image side surface 303b is convex, and both the object side surface 303a and the image side surface 303b are aspherical. The material of the third lens 303 is plastic.

The fourth lens 304 has positive refractive power, its object side surface 304a is convex, its image side surface 304b is convex, and its object side surface 304a and image side surface 304b are spherical surfaces. The material of the fourth lens 304 is glass.

The fifth lens 305 has positive refractive power, the object side surface 305a is convex, the image side surface 305b is convex, and the object side surface 305a and the image side surface 305b are spherical surfaces. The material of the fifth lens 305 is glass.

The sixth lens element 306 has a negative refractive power, its object side surface 306a is concave, its image side surface 306b is convex, and its object side surface 306a and image side surface 306b are spherical surfaces. The material of the sixth lens 306 is glass. The image side surface 305b of the fifth lens 305 and the object side surface 306a of the sixth lens 306 have the same radius of curvature, and are bonded to each other to form a cemented lens.

The seventh lens 307 has a positive refractive power, the object side surface 307a is convex, the image side surface 307b is concave, and the object side surface 307a and the image side surface 307b are both aspherical. The material of the seventh lens 307 is plastic.

The filter element 308 is disposed between the seventh lens 307 and the imaging surface 310 to filter out light in a specific wavelength range, for example, an infrared filter (IR Filter). The two surfaces 308a and 308b of the filter element 308 are both flat surfaces, and the material is glass.

The protective glass 309 is disposed on the image sensor 320, and its two surfaces 309a and 309b are flat surfaces, and the material is glass.

The Image Sensor 320 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a CMOS Image Sensor.

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 300 of the third embodiment are listed in Table 6 and Table 7, respectively. In the third embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the third embodiment, the numerical values of the relational expressions of the optical image capturing lens group 300 are listed in Table 8. It can be seen from Table 8 that the optical image capturing lens group 300 of the third embodiment satisfies the requirements of relational expressions (1) to (14), and it can be seen from Table 6 that the optical image capturing lens group 300 satisfies the requirements of including at least two lenses with a refractive index greater than Equal to the condition of the lens of 1.7.

Referring to FIG. 3B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 300 from left to right. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. From the astigmatic field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.02mm; and the distortion aberration can be controlled within 2%. As shown in FIG. 3B, the optical image capturing lens assembly 300 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Fourth embodiment

Referring to FIGS. 4A and 4B, FIG. 4A is a schematic diagram of an optical image capturing lens group according to a fourth embodiment of the present invention. Fig. 4B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the fourth embodiment of the present invention in order from left to right.

As shown in FIG. 4A, the optical image capturing lens group 400 of the fourth embodiment includes a first lens 401, a second lens 402, a third lens 403, a fourth lens 404, an aperture ST, The fifth lens 405, the sixth lens 406, and the seventh lens 407. The optical image capturing lens group 400 may further include a filter element 408, a protective glass 409, and an imaging surface 410. An image sensing element 420 can be further provided on the imaging surface 410 to form an imaging device (not marked separately).

The first lens 401 has a negative refractive power, the object side 401a is convex, the image side 401b is concave, and the object side 401a and the image side 401b are both spherical. The material of the first lens 401 is glass.

The second lens 402 has a negative refractive power, the object side 402a is convex, the image side 402b is concave, and the object side 402a and the image side 402b are both spherical. The material of the second lens 402 is glass.

The third lens 403 has a negative refractive power, the object side surface 403a is concave, the image side surface 403b is convex, and both the object side surface 403a and the image side surface 403b are aspherical. The material of the third lens 403 is glass.

The fourth lens 404 has positive refractive power, its object side surface 404a is convex, its image side surface 404b is convex, and its object side surface 404a and image side surface 404b are spherical surfaces. The material of the fourth lens 404 is glass.

The fifth lens 405 has a positive refractive power, the object side surface 405a is convex, the image side surface 405b is convex, and the object side surface 405a and the image side surface 405b are spherical surfaces. The material of the fifth lens 405 is glass.

The sixth lens element 406 has negative refractive power, its object side surface 406a is concave, its image side surface 406b is convex, and its object side surface 406a and image side surface 406b are spherical surfaces. The material of the sixth lens 406 is glass. The image side surface 405b of the fifth lens 405 and the object side surface 406a of the sixth lens 406 have the same radius of curvature, and are bonded to each other to form a cemented lens.

The seventh lens 407 has a positive refractive power, the object side surface 407a is convex, the image side surface 407b is concave, and the object side surface 407a and the image side surface 407b are both aspherical. The material of the seventh lens 407 is plastic.

The filter element 408 is disposed between the seventh lens 407 and the imaging surface 410 to filter out light in a specific wavelength range, for example, an infrared filter (IR Filter). Both surfaces 408a and 408b of the filter element 408 are flat surfaces, and the material is glass.

The protective glass 409 is disposed on the image sensor 420, and its two surfaces 409a and 409b are both flat surfaces, and its material is glass.

The Image Sensor 420 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a CMOS Image Sensor.

The detailed optical data and the aspheric coefficients of the lens surface of the optical image capturing lens group 400 of the fourth embodiment are listed in Table 9 and Table 10, respectively. In the fourth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the fourth embodiment, the values of the relational expressions of the optical image capturing lens group 400 are listed in Table 11. It can be seen from Table 11 that the optical image capturing lens group 400 of the fourth embodiment meets the requirements of relational expressions (1) to (14), and it can be seen from Table 9 that the optical image capturing lens group 400 satisfies the refractive index of at least two The conditions for a lens greater than or equal to 1.7.

Referring to FIG. 4B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 400, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.04mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.03mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.03mm; and the distortion aberration can be controlled The system is within 5%. As shown in FIG. 4B, the optical image capturing lens group 400 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Fifth embodiment

Referring to FIGS. 5A and 5B, FIG. 5A is a schematic diagram of an optical image capturing lens group according to a fifth embodiment of the present invention. Fig. 5B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism/Field Curvature diagram (Astigmatism/Field Curvature) and a distortion aberration diagram (Distortion) of the fifth embodiment of the present invention in order from left to right.

As shown in FIG. 5A, the optical image capturing lens group 500 of the fifth embodiment includes a first lens 501, a second lens 502, a third lens 503, a fourth lens 504, an aperture ST, The fifth lens 505, the sixth lens 506, and the seventh lens 507. The optical image capturing lens group 500 may further include a filter element 508, a protective glass 509, and an imaging surface 510. An image sensing element 520 can be further provided on the imaging surface 510 to form an imaging device (not shown).

The first lens 501 has a negative refractive power, the object side surface 501a is a convex surface, the image side surface 501b is a concave surface, and the object side surface 501a and the image side surface 501b are both spherical surfaces. The material of the first lens 501 is glass.

The second lens 502 has a negative refractive power, the object side surface 502a is convex, the image side surface 502b is concave, and the object side surface 502a and the image side surface 502b are spherical surfaces. The material of the second lens 502 is glass.

The third lens 503 has a negative refractive power, the object side 503a is concave, the image side 503b is convex, and both the object side 503a and the image side 503b are aspherical. The material of the third lens 503 is plastic.

The fourth lens 504 has a positive refractive power, its object side surface 504a is convex, its image side surface 504b is convex, and its object side surface 504a and image side surface 504b are spherical surfaces. The material of the fourth lens 504 is glass.

The fifth lens 505 has a positive refractive power, the object side surface 505a is convex, the image side surface 505b is convex, and both the object side surface 505a and the image side surface 505b are spherical surfaces. The material of the fifth lens 505 is glass.

The sixth lens element 506 has negative refractive power, its object side surface 506a is concave, its image side surface 506b is convex, and its object side surface 506a and image side surface 506b are spherical surfaces. The material of the sixth lens 506 is glass. The image side surface 505b of the fifth lens 505 and the object side surface 506a of the sixth lens 506 have the same radius of curvature, and are bonded to each other to form a cemented lens.

The seventh lens 507 has a positive refractive power, the object side 507a is convex, the image side 507b is concave, and both the object side 507a and the image side 507b are aspherical. The material of the seventh lens 507 is glass.

The filter element 508 is disposed between the seventh lens 507 and the imaging surface 510 to filter out light in a specific wavelength range, for example, an infrared filter (IR Filter). Both surfaces 508a and 508b of the filter element 508 are flat surfaces, and the material is glass.

The protective glass 509 is disposed on the image sensing element 520, and its two surfaces 509a and 509b are flat surfaces, and the material is glass.

The image sensor (Image Sensor) 520 is, for example, a charge-coupled device (CCD) Image Sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 500 of the fifth embodiment are listed in Table 12 and Table 13, respectively. In the fifth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the fifth embodiment, the numerical values of the relational expressions of the optical image capturing lens group 500 are listed in Table 14. It can be seen from Table 14 that the optical image capturing lens group 500 of the fifth embodiment meets the requirements of relational expressions (1) to (14), and it can be seen from Table 9 that the optical image capturing lens group 500 satisfies the refractive index of at least two The conditions for a lens greater than or equal to 1.7.

Referring to FIG. 5B, from left to right, the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 500 are respectively shown from left to right. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.01mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.02mm; and the distortion aberration can be controlled within 16%. As shown in FIG. 5B, the optical image capturing lens assembly 500 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Sixth embodiment

Referring to FIGS. 6A and 6B, FIG. 6A is a schematic diagram of an optical image capturing lens group according to a sixth embodiment of the present invention. FIG. 6B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the sixth embodiment of the present invention in order from left to right.

As shown in FIG. 6A, the optical image capturing lens group 600 of the sixth embodiment includes a first lens 601, a second lens 602, a third lens 603, a fourth lens 604, an aperture ST, The fifth lens 605, the sixth lens 606, and the seventh lens 607. The optical image capturing lens group 600 may further include a filter element 608, a protective glass 609, and an imaging surface 610. An image sensing element 620 can be further disposed on the imaging surface 610 to form an imaging device (not marked separately).

The first lens 601 has a negative refractive power, the object side surface 601a is convex, the image side surface 601b is concave, and both the object side surface 601a and the image side surface 601b are spherical surfaces. The material of the first lens 601 is glass.

The second lens 602 has a negative refractive power, the object side surface 602a is convex, the image side surface 602b is concave, and both the object side surface 602a and the image side surface 602b are spherical surfaces. The material of the second lens 602 is glass.

The third lens 603 has a negative refractive power, the object side 603a is concave, the image side 603b is convex, and both the object side 603a and the image side 603b are aspherical. The material of the third lens 603 is glass.

The fourth lens 604 has positive refractive power, its object side surface 604a is convex, its image side surface 604b is concave, and its object side surface 604a and image side surface 604b are spherical surfaces. The material of the fourth lens 604 is glass.

The fifth lens 605 has positive refractive power, the object side surface 605a is convex, the image side surface 605b is convex, and the object side surface 605a and the image side surface 605b are spherical surfaces. The material of the fifth lens 605 is glass.

The sixth lens element 606 has negative refractive power, its object side surface 606a is concave, its image side surface 606b is convex, and its object side surface 606a and image side surface 606b are spherical surfaces. The material of the sixth lens 606 is glass. The image side surface 605b of the fifth lens 605 and the object side surface 606a of the sixth lens 606 have the same radius of curvature, and are bonded to each other to form a cemented lens.

The seventh lens 607 has positive refractive power, the object side surface 607a is convex, the image side surface 607b is concave, and the object side surface 607a and the image side surface 607b are both aspherical. The material of the seventh lens 607 is glass.

The filter element 608 is disposed between the seventh lens 607 and the imaging surface 610 to filter out light in a specific wavelength range, for example, an infrared filter (IR Filter). Both surfaces 608a and 608b of the filter element 608 are flat surfaces, and the material is glass.

The protective glass 609 is disposed on the image sensing element 620, and its two surfaces 609a and 609b are flat surfaces, and the material is glass.

The Image Sensor 620 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a CMOS Image Sensor.

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens assembly 600 of the sixth embodiment are listed in Table 15 and Table 16, respectively. In the sixth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the sixth embodiment, the values of the relational expressions of the optical image capturing lens group 600 are listed in Table 17. It can be seen from Table 17 that the optical image capturing lens group 600 of the sixth embodiment satisfies the requirements of relational expressions (1) to (14), and it can be seen from Table 15 that the optical image capturing lens group 600 satisfies the requirements of including at least two refraction The condition of a lens with a rate greater than or equal to 1.7.

6B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 600 from left to right. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light at 470nm, 550nm and 650nm wavelengths at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.05mm. It can be seen from the astigmatic field curvature aberration diagram (wavelength 550nm) that the focal length change of the sagittal aberration in the entire field of view is within ±0.03mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.04mm; and the distortion aberration can be controlled The system is within 10%. As shown in FIG. 6B, the optical image capturing lens assembly 600 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Seventh embodiment

Referring to FIGS. 7A and 7B, FIG. 7A is a schematic diagram of an optical image capturing lens group according to a seventh embodiment of the present invention. FIG. 7B shows the longitudinal spherical aberration (Longitudinal Spherical Aberration), the astigmatism/Field Curvature (Astigmatism/Field Curvature) and the distortion aberration (Distortion) of the seventh embodiment of the present invention in order from left to right.

As shown in FIG. 7A, the optical image capturing lens group 700 of the seventh embodiment includes a first lens 701, a second lens 702, a third lens 703, a fourth lens 704, an aperture ST, The fifth lens 705, the sixth lens 706, and the seventh lens 707. The optical image capturing lens group 700 may further include a filter element 708, a protective glass 709, and an imaging surface 710. An image sensing element 720 can be further provided on the imaging surface 710 to form an imaging device (not shown).

The first lens 701 has a negative refractive power, the object side surface 701a is convex, the image side surface 701b is concave, and both the object side surface 701a and the image side surface 701b are spherical surfaces. The material of the first lens 701 is glass.

The second lens 702 has a negative refractive power, the object side surface 702a is convex, the image side surface 702b is concave, and the object side surface 702a and the image side surface 702b are spherical surfaces. The material of the second lens 702 is glass.

The third lens 703 has a negative refractive power, the object side surface 703a is concave, the image side surface 703b is convex, and both the object side surface 703a and the image side surface 703b are aspherical. The material of the third lens 703 is plastic.

The fourth lens 704 has a positive refractive power, its object side surface 704a is convex, its image side surface 704b is convex, and its object side surface 704a and image side surface 704b are spherical surfaces. The material of the fourth lens 704 is glass.

The fifth lens element 705 has a positive refractive power, the object side surface 705a is convex, the image side surface 705b is convex, and the object side surface 705a and the image side surface 705b are spherical surfaces. The material of the fifth lens 705 is glass.

The sixth lens element 706 has negative refractive power, its object side surface 706a is concave, its image side surface 706b is convex, and its object side surface 706a and image side surface 706b are spherical surfaces. The material of the sixth lens 706 is glass. The image side surface 705b of the fifth lens 705 and the object side surface 706a of the sixth lens 706 have the same radius of curvature, and are bonded to each other to form a cemented lens.

The seventh lens 707 has a positive refractive power, the object side surface 707a is convex, the image side surface 707b is concave, and the object side surface 707a and the image side surface 707b are aspherical. The material of the seventh lens 707 is glass.

The filter element 708 is disposed between the seventh lens 707 and the imaging surface 710 to filter out light in a specific wavelength range, for example, an infrared filter (IR Filter). Both surfaces 708a and 708b of the filter element 708 are flat surfaces, and the material is glass.

The protective glass 709 is disposed on the image sensor 720, and its two surfaces 709a and 709b are both flat surfaces, and its material is glass.

The image sensor 720 is, for example, a charge-coupled device (CCD) image sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens assembly 700 of the seventh embodiment are listed in Table 18 and Table 19, respectively. In the seventh embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the seventh embodiment, the values of the relational expressions of the optical image capturing lens group 700 are listed in Table 20. It can be seen from Table 20 that the optical image capturing lens group 700 of the seventh embodiment satisfies the requirements of relational expressions (1) to (14), and it can be seen from Table 18 that the optical image capturing lens group 700 satisfies the requirements of including at least two refraction The condition of a lens with a rate greater than or equal to 1.7.

Referring to FIG. 7B, from left to right, the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 700 are respectively shown from left to right. It can be seen from the longitudinal spherical aberration diagram that the three types of off-axis rays of visible light with wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. From the astigmatic field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.03mm; and the distortion aberration can be controlled within 3%. As shown in FIG. 7B, the optical image capturing lens assembly 700 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Eighth embodiment

Referring to FIGS. 8A and 8B, FIG. 8A is a schematic diagram of an optical image capturing lens group according to an eighth embodiment of the present invention. FIG. 8B is a longitudinal spherical aberration diagram (Longitudinal Spherical Aberration), an astigmatism field curvature diagram (Astigmatism/Field Curvature), and a distortion aberration diagram (Distortion) of the eighth embodiment of the present invention in order from left to right.

As shown in FIG. 8A, the optical image capturing lens group 800 of the eighth embodiment includes a first lens 801, a second lens 802, a third lens 803, a fourth lens 804, an aperture ST, The fifth lens 805, the sixth lens 806, and the seventh lens 807. The optical image capturing lens group 800 can further include a filter element 808, a protective glass 809, and an imaging surface 810. An image sensing element 820 can be further provided on the imaging surface 810 to form an imaging device (not marked separately).

The first lens 801 has a negative refractive power, the object side surface 801a is convex, the image side surface 801b is concave, and both the object side surface 801a and the image side surface 801b are spherical surfaces. The material of the first lens 801 is glass.

The second lens 802 has a negative refractive power, the object side surface 802a is convex, the image side surface 802b is concave, and the object side surface 802a and the image side surface 802b are spherical surfaces. The material of the second lens 802 is glass.

The third lens 803 has a negative refractive power, the object side 803a is concave, the image side 803b is convex, and both the object side 803a and the image side 803b are aspherical. The material of the third lens 803 is plastic.

The fourth lens 804 has a positive refractive power, its object side surface 804a is convex, its image side surface 804b is convex, and its object side surface 804a and image side surface 804b are spherical surfaces. The material of the fourth lens 804 is glass.

The fifth lens 805 has a positive refractive power, the object side surface 805a is convex, the image side surface 805b is convex, and the object side surface 805a and the image side surface 805b are spherical surfaces. The material of the fifth lens 805 is glass.

The sixth lens element 806 has negative refractive power, its object side surface 806a is concave, its image side surface 806b is convex, and its object side surface 806a and image side surface 806b are spherical surfaces. The material of the sixth lens 806 is glass. Wherein, the image side surface 805b of the fifth lens 805 and the object side surface 806a of the sixth lens 806 have the same radius of curvature, and are bonded to each other to form a cemented lens.

The seventh lens 807 has positive refractive power, the object side 807a is convex, the image side 807b is concave, and both the object side 807a and the image side 807b are aspherical. The material of the seventh lens 807 is plastic.

The filter element 808 is disposed between the seventh lens 807 and the imaging surface 810 to filter out light in a specific wavelength range, for example, an infrared filter (IR Filter). The two surfaces 808a and 808b of the filter element 808 are both flat surfaces, and the material is glass.

The protective glass 809 is disposed on the image sensing element 820, and its two surfaces 809a and 809b are both flat surfaces, and its material is glass.

The image sensor (Image Sensor) 820 is, for example, a charge-coupled device (CCD) Image Sensor or a complementary metal oxide semiconductor sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical image capturing lens group 800 of the eighth embodiment are listed in Table 21 and Table 22, respectively. In the eighth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment.

In the eighth embodiment, the values of the relational expressions of the optical image capturing lens group 800 are listed in Table 23. It can be seen from Table 23 that the optical image capturing lens group 800 of the eighth embodiment satisfies the requirements of relational expressions (1) to (14), and it can be seen from Table 21 that the optical image capturing lens group 800 satisfies the requirements of including at least two The condition of a lens with a refractive index greater than or equal to 1.7.

Referring to FIG. 8B, from left to right are the longitudinal spherical aberration diagram, the astigmatic field curvature aberration diagram, and the distortion aberration diagram of the optical image capturing lens group 800, respectively. It can be seen from the longitudinal spherical aberration diagram that the three types of visible light Off-axis light with wavelengths of 470nm, 550nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. From the astigmatic field curvature aberration diagram (wavelength 550nm), it can be seen that the focal length change of the sagittal aberration in the entire field of view is within ±0.02mm; the meridian aberration is the focal length of the entire field of view. The amount of change is within ±0.03mm; and the distortion aberration can be controlled within 3%. As shown in FIG. 8B, the optical image capturing lens assembly 800 of this embodiment has well corrected various aberrations, and meets the imaging quality requirements of the optical system.

Ninth embodiment

The ninth embodiment of the present invention is an imaging device. The imaging device includes the optical image capturing lens group of the aforementioned first to eighth embodiments, and an image sensing element. The image sensor device is, for example, a charge-coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) image sensor device. This imaging device is, for example, a camera module for car photography, a camera module for portable electronic products, or a camera module for surveillance cameras.

Tenth embodiment

Please refer to FIG. 9, which is a schematic diagram of an electronic device 1000 according to a tenth embodiment of the present invention. As shown in the figure, the electronic device 1000 includes an imaging device 1010. The imaging device 1010 is, for example, the imaging device of the aforementioned ninth embodiment, and can be composed of the optical image capturing lens group of the present invention and an image sensing element. The electronic device 1000 is, for example, a car camera, a surveillance camera, or an aerial camera.

Although the present invention is described using the foregoing several embodiments, these embodiments are not intended to limit the scope of the present invention. For those with ordinary knowledge in the technical field to which the present invention belongs, without departing from the spirit and scope of the present invention, they can still refer to the contents of the embodiments disclosed in the present invention for formal analysis. And many changes in details. Therefore, it should be understood here that the present invention is subject to the scope of the following patent applications. Any changes made within the scope of the patent application or its equivalent scope shall still fall into the application of the present invention. Within the scope of the patent.

100: Optical image capture lens group

101: The first lens

102: second lens

103: third lens

104: fourth lens

105: Fifth lens

106: sixth lens

107: seventh lens

108: filter element

109: Protective glass

110: imaging surface

101a: Object side of the first lens

101b: The side of the image of the first lens

102a: Object side of the second lens

102b: The side of the image of the second lens

103a: The object side of the third lens

103b: The image side of the third lens

104a: The object side of the fourth lens

104b: The side of the image of the fourth lens

105a: the object side of the fifth lens

105b: The side of the image of the fifth lens

106a: The object side of the sixth lens

106b: The side of the image of the sixth lens

107a: The object side of the seventh lens

107b: The image side of the seventh lens

108a, 108b: The second surface of the filter element

109a, 109b: Protect the second surface of glass

120: Image sensor

I: Optical axis

ST: Aperture

Claims (17)

An optical image capturing lens group, from the object side to the image side, sequentially includes: a first lens with negative refractive power, a convex surface on the object side surface and a concave surface on the image side surface; a second lens with negative refractive power, which The object side surface is convex and the image side surface is concave; a third lens has negative refractive power, the object side surface is concave, and the image side surface is convex; a fourth lens has positive refractive power, and its object side surface is convex; an aperture; A fifth lens has positive refractive power, the object side is convex, and the image side is convex; a sixth lens has negative refractive power, the object side is concave, and the image side is convex, wherein the fifth lens and the The sixth lens constitutes a cemented lens; and a seventh lens with positive refractive power, with a convex object side surface and a concave image side surface; wherein the total number of lenses in the optical image capturing lens group is seven; The focal length of one lens is f1, and the focal length of the third lens is f3, which satisfies the following relationship: 0.95<f3/f1<6.2. For example, the optical image capturing lens group of item 1 of the scope of patent application, wherein the distance on the optical axis from the image side surface of the fourth lens to the object side surface of the fifth lens is AT45, and the focal length of the optical image capturing lens group is EFL , The system satisfies the following relationship: 0.4<AT45/EFL<1.3. For example, the optical image capturing lens group of item 1 of the scope of patent application, wherein the focal length of the first lens is f2, and the focal length of the third lens f3 satisfies the following relationship: 2.9<f3/f2<7. An optical image capturing lens group, which sequentially includes from the object side to the image side: a first lens having a negative refractive power, the object side surface is a convex surface, and the image side surface is a concave surface; A second lens with negative refractive power, the object side is convex, and the image side is concave; a third lens, with negative refractive power, the object side is concave, and the image side is convex; a fourth lens, with positive refractive power Power, the object side is convex; an aperture; a fifth lens, with positive refractive power, the object side is convex, the image side is convex; a sixth lens, with negative refractive power, the object side is concave, the image side It is a convex surface, wherein the fifth lens and the sixth lens constitute a cemented lens; and a seventh lens having a positive refractive power, the object side surface is a convex surface, and the image side surface is a concave surface; wherein the optical image capturing lens group The total number of lenses is seven; among them, the focal length of the second lens is f2, the focal length of the third lens is f3, the distance on the optical axis from the image side of the sixth lens to the object side of the seventh lens is AT67, the The curvature radius of the object side of the seventh lens is R13, which satisfies the following relationship: 2.9<f3/f2<7; and 0.1<AT67/R13<0.6. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the focal length of the fourth lens is f4, and the effective focal length EFL of the optical image capturing lens group satisfies the following relationship Formula: 2<f4/EFL<3.5. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the combined focal length of the fifth lens and the sixth lens is f56, which is compared with the effective focal length EFL of the optical image capturing lens group In the meantime, the system satisfies the following relationship: 2.7<f56/EFL<7.5. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the radius of curvature of the image side surface of the fifth lens is R10, which is between the effective focal length EFL of the optical image capturing lens group and Meet the following relationship: -1.5<R10/EFL<-0.9. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the distance from the aperture to the imaging surface of the optical image capturing lens group on the optical axis is SL, and the object side of the first lens is to The distance of the imaging surface of the optical image capturing lens group on the optical axis is TTL, which satisfies the following relationship: 0.4<SL/TTL<0.7. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, in which the curvature radius of the first lens object side is R1 and the curvature radius of the image side is R2, which satisfies the following relationship: 1.3<R1 /R2<3.2. For example, the optical image capturing lens set of item 1 or item 4 of the scope of patent application, wherein the curvature radius of the object side surface of the first lens is R1, and the curvature radius of the image side surface of the second lens is R4, the optical image capturing The effective focal length of the lens group is EFL, which satisfies the following relationship: 0.8<EFL/R1+EFL/R4<1.4. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the total thickness of the first lens to the seventh lens on the optical axis is ΣCT, and the object side of the first lens to the seventh lens The distance between the side surface of the lens and the optical axis is Dr1r14, which satisfies the following relationship: 0.4<ΣCT/Dr1r14<0.65. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the distance from the object side of the first lens to the imaging surface of the optical image capturing lens group on the optical axis is TTL, the optical image The maximum image height of the capturing lens group on the imaging surface is ImgH, which satisfies the following relationship: 4<TTL/ImgH<7.5. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the dispersion coefficient of the fifth lens is Vd5, and the dispersion coefficient of the sixth lens is Vd6, which satisfies the following relationship: Vd5>Vd6 . For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the dispersion coefficient of the fourth lens is Vd4, which satisfies the following relationship: Vd4<45. For example, the optical image capturing lens group of item 1 or item 4 of the scope of patent application, wherein the optical image capturing lens group includes at least two lenses with a refractive index greater than or equal to 1.7. An imaging device comprising the optical image capturing lens group as claimed in item 1 or item 4 of the scope of patent application, and an image sensor element, wherein the image sensor element is arranged in the optical image capturing lens group Imaging surface. An electronic device including the imaging device as claimed in item 16 of the scope of patent application.

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