CN110187478B - Optical imaging lens - Google Patents

Abstract

The application provides an optical imaging lens, which sequentially comprises the following components from an object side to an image side along an optical axis: the included angle between the reflecting surface of the prism and the optical axis is 45 degrees; a diaphragm; a first lens with positive focal power, the object side surface of which is a convex surface; a second lens having optical power; a third lens having negative optical power, the image-side surface of which is concave; a fourth lens having optical power; a fifth lens having optical power, an image-side surface of which is convex; a sixth lens with negative focal power, the object side surface of which is a convex surface; the on-axis distance PL from the image side of the prism to the object side of the first lens satisfies 0.30mm < PL < 1.00mm.

Description

Optical imaging lens

Technical Field

The present application relates to an optical imaging lens, and in particular to an optical imaging lens including a prism and six lenses having optical power.

Background

The imaging function of portable electronic devices is increasingly demanded, and the size of an optical imaging lens provided thereon is also limited because the portable electronic devices are expected to have smaller sizes.

Electronic devices such as mobile phones are limited in mounting size, and the mounting space allocated to the lens is small, so that the size of the equipped lens is small, and the optical characteristics of the lens are limited. Therefore, how to realize a tele lens that has good optical characteristics and can meet the miniaturization requirement is a problem to be solved at present.

Disclosure of Invention

The present application provides an optical imaging lens device, e.g. an optical imaging lens comprising a prism, which at least solves or partly solves at least one of the above-mentioned drawbacks of the prior art. The application deflects the light transmission route in the lens group by adding the reflecting prism, so that the light rays are not completely and longitudinally transmitted. The module volume originally piled up at the vertical axis can be changed into the transverse direction by the arrangement, so that long focal length can be realized under the condition of meeting the light and thin characteristics of the mobile phone.

The application provides an optical imaging lens, which sequentially comprises the following components from an object side to an image side along an optical axis: the included angle between the reflecting surface of the prism and the optical axis is 45 degrees; a diaphragm; a first lens with positive focal power, the object side surface of which is a convex surface; a second lens having optical power; a third lens having negative optical power, the image-side surface of which is concave; a fourth lens having optical power; a fifth lens having optical power, an image-side surface of which is convex; the object side surface of the sixth lens with negative focal power is a convex surface.

According to an embodiment of the present application, the on-axis distance PL from the image side of the prism to the object side of the first lens satisfies 0.30mm < PL < 1.00mm.

According to an embodiment of the application, the on-axis distance TTL from the entrance surface of the prism to the imaging surface of the optical imaging lens and half the diagonal length ImgH of the effective pixel area on the imaging surface of the optical imaging lens satisfy TTL/ImgH > 6.00.

According to an embodiment of the present application, the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens satisfy 3.00 < |f/f1|+|f/f3| < 5.00.

According to an embodiment of the present application, the on-axis distance PL from the image side surface of the prism to the object side surface of the first lens and half the diagonal length ImgH of the effective pixel region on the imaging surface of the optical imaging lens satisfy 10.00 < 100×pl/ImgH < 25.00.

According to an embodiment of the present application, the radius of curvature R9 of the object-side surface of the fifth lens and the radius of curvature R10 of the image-side surface of the fifth lens satisfy 0.50 < R9/R10 < 2.00.

According to an embodiment of the present application, the center thickness CT1 of the first lens on the optical axis, the center thickness CT2 of the second lens on the optical axis, the interval distance T12 of the first lens and the second lens on the optical axis, and the interval distance T23 of the second lens and the third lens on the optical axis satisfy 5.00 < (CT 1+ CT 2)/(T12-T23) < 7.00.

According to the embodiment of the present application, the on-axis distance SAG41 from the intersection point of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens and the on-axis distance SAG42 from the intersection point of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens satisfy 1.00 < SAG41/SAG42 < 3.50.

According to an embodiment of the present application, the distance T45 between the fourth lens and the fifth lens on the optical axis and the distance TTL between the incident surface of the prism and the imaging surface of the optical imaging lens on the axis satisfy 1.00 < 10×t45/TTL < 2.50.

According to an embodiment of the present application, the effective focal length f of the optical imaging lens and the radius of curvature R10 of the image side surface of the fifth lens satisfy-5.00 < f/R10 < -3.00.

According to an embodiment of the present application, the center thickness CT3 of the third lens on the optical axis and the separation distance T34 of the third lens and the fourth lens on the optical axis satisfy 0.50 < CT3/T34 < 2.00.

The application provides an optical imaging lens comprising a prism and a plurality of (e.g. six) lenses, wherein the prism is arranged to enable an included angle of 90 degrees between the incident direction of light rays and the arrangement direction of the plurality of lenses, so that the size of the optical imaging lens in the incident direction of the light rays is reduced. Meanwhile, the optical imaging lens group has the beneficial effects of miniaturization, high imaging quality and long focal length by reasonably distributing the focal power, the surface type, the center thickness of each lens, the axial spacing between each lens and the like.

Drawings

The above and other advantages of embodiments of the present application will become apparent by reference to the following detailed description of the embodiments of the application with the accompanying drawings, which are intended to illustrate exemplary embodiments of the application and not to limit it. In the drawings:

Fig. 1 is a schematic structural view showing an optical imaging lens according to a first embodiment of the present application;

Fig. 2A to 2D sequentially show an on-axis chromatic aberration curve, a chromatic aberration curve of magnification, an astigmatic curve, and a distortion curve according to the first embodiment of the present application;

Fig. 3 is a schematic structural diagram showing an optical imaging lens according to a second embodiment of the present application;

Fig. 4A to 4D sequentially show an on-axis chromatic aberration curve, a chromatic aberration curve of magnification, an astigmatic curve, and a distortion curve according to a second embodiment of the present application;

fig. 5 shows a schematic structural diagram of an optical imaging lens according to a third embodiment of the present application;

Fig. 6A to 6D sequentially show an on-axis chromatic aberration curve, a chromatic aberration curve of magnification, an astigmatic curve, and a distortion curve according to a third embodiment of the present application;

fig. 7 is a schematic structural view showing an optical imaging lens according to a fourth embodiment of the present application;

fig. 8A to 8D sequentially show an on-axis chromatic aberration curve, a chromatic aberration curve of magnification, an astigmatic curve, and a distortion curve according to a fourth embodiment of the present application;

fig. 9 is a schematic structural view showing an optical imaging lens according to a fifth embodiment of the present application; and

Fig. 10A to 10D sequentially show an on-axis chromatic aberration curve, a chromatic aberration curve of magnification, an astigmatism curve, and a distortion curve according to the fifth embodiment of the present application.

Detailed Description

For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens of an optical imaging lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.

Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. In each lens, the surface closest to the subject is referred to as the subject side of the lens; in each lens, the surface closest to the imaging plane is referred to as the image side of the lens.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

The features, principles, and other aspects of the present application are described in detail below.

The optical imaging lens according to an exemplary embodiment of the present application may include: a prism, a diaphragm, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, wherein the prism is arranged such that an angle between a reflecting surface thereof and an optical axis is 45 °. The six lenses are arranged in sequence from the image side to the image side of the prism along the optical axis, and each adjacent lens and the first lens can have an air space therebetween.

The prism may be a triangular prism having an entrance face, a reflecting face, and an exit face, wherein the entrance face and the exit face are perpendicular. Light rays which are perpendicular to the incident surface are reflected by the reflecting surface, the direction of the light rays is changed by 90 degrees, and the light rays are perpendicular to the emergent surface and emergent. The prism enables the direction of incident light rays of the optical imaging lens to be perpendicular to the arrangement direction of the plurality of lenses, so that the length space of the mobile phone is utilized to match the arrangement length of the plurality of lenses, and the limitation of the thickness of the body to the focal length of the lens is avoided.

In an exemplary embodiment, the first lens may have positive optical power, with its object-side surface being convex; the second lens has positive optical power or negative optical power; the third lens has negative focal power, and the image side surface of the third lens is a concave surface; the fourth lens has positive focal power or negative focal power; the fifth lens has positive focal power or negative focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power, and the object side surface of the sixth lens is a convex surface. The optical power of the lens is reasonably configured, the surface shape of the lens is reasonably arranged, the off-axis aberration of the optical imaging lens is corrected, and the imaging quality is improved.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the conditional expression 0.30mm < PL < 1.00mm, wherein PL is an on-axis distance from an image side surface of the prism to an object side surface of the first lens. In an exemplary embodiment, PL may satisfy 0.50mm < PL < 0.95mm. The axial distance from the image side surface of the prism to the object side surface of the first lens is controlled, the divergence degree of light beams at the prism can be controlled, the light beams are reasonably formed, the volume setting of the prism caused by the divergence of the light beams is avoided, the inconvenience in assembly caused by insufficient space between the prism and the first lens can be prevented, and the assembly difficulty of the optical imaging lens is reduced.

In an exemplary embodiment, the optical imaging lens provided by the application can meet the condition that the conditional expression TTL/ImgH is more than 6.00, wherein TTL is the on-axis distance from the incident surface of the prism to the imaging surface of the optical imaging lens, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. In an exemplary embodiment, TTL and ImgH can satisfy TTL/ImgH > 6.30. The ratio of the on-axis distance from the incident surface of the prism to the imaging surface of the optical imaging lens to the image height is controlled, so that the angle of view of the optical imaging lens can be controlled, the refraction degree of light rays at the first lens is mild, and then the optical imaging lens has the characteristics of smaller imaging aberration and high imaging quality.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that the condition formula 3.00 < |f/f1|+|f/f3| < 5.00, wherein f is the effective focal length of the optical imaging lens, f1 is the effective focal length of the first lens, and f3 is the effective focal length of the third lens. In an exemplary embodiment, f1, and f3 may satisfy 3.25 < |f/f1|+|f/f3| < 4.75. By distributing the effective focal lengths of the first lens and the third lens, the optical imaging lens can better balance aberration.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the conditional expression 10.00 < 100×pl/ImgH < 25.00, PL is an on-axis distance from an image side surface of the prism to an object side surface of the first lens, and ImgH is a half of a diagonal length of an effective pixel area on an imaging surface of the optical imaging lens. In an exemplary embodiment, PL and ImgH can satisfy 13.00 < 100 XPL/ImgH < 22.00. The ratio of the axial distance from the image side surface of the prism to the object side surface of the first lens to the image height is controlled, the divergence angle of the light beam at the prism can be controlled, the assembly difficulty of the prism and the lens can be reduced, and in addition, the optical imaging lens has higher imaging quality.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the conditional expression 0.50 < R9/R10 < 2.00, wherein R9 is a radius of curvature of an object side surface of the fifth lens, and R10 is a radius of curvature of an image side surface of the fifth lens. In an exemplary embodiment, R9 and R10 may satisfy 0.80 < R9/R10 < 1.90. The curvature radius of the object side surface and the image side surface of the fifth lens is controlled, so that the fifth lens has lower bending amount and is easy to process. Meanwhile, the optical imaging lens has better capacity of balancing chromatic aberration and distortion.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that (CT1+CT2)/(T12-T23) < 7.00, wherein CT1 is the center thickness of the first lens on the optical axis, CT2 is the center thickness of the second lens on the optical axis, T12 is the interval distance between the first lens and the second lens on the optical axis, and T23 is the interval distance between the second lens and the third lens on the optical axis. The thickness of the center of each of the first lens and the second lens on the optical axis and the thickness of the air spaces on the two sides of the second lens on the optical axis are controlled, so that the size of the optical imaging lens can be effectively reduced, higher space utilization rate is realized, and in addition, the assembly difficulty of the lenses can be reduced.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that 1.00 < SAG41/SAG42 < 3.50, wherein SAG41 is an on-axis distance from an intersection point of an object side surface of the fourth lens and an optical axis to an effective radius vertex of the object side surface of the fourth lens, and SAG42 is an on-axis distance from an intersection point of an image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens. In an exemplary embodiment, SAG41 and SAG42 may satisfy 1.40 < SAG41/SAG42 < 3.40. By controlling the sagittal height of the two mirror surfaces of the fourth lens, the fourth lens has lower bending degree, the fourth lens is easy to process and obtain, and in addition, the optical imaging lens has higher assembly stability.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that 1.00 is less than 10×t45/TTL is less than 2.50, wherein T45 is the interval distance between the fourth lens and the fifth lens on the optical axis, and TTL is the axial distance from the incident surface of the prism to the imaging surface of the optical imaging lens. In an exemplary embodiment, T45 and TTL can satisfy 1.50 < 10×T45/TTL < 2.20. By distributing the interval distance of the lenses of the optical imaging lens on the optical axis, the optical imaging lens has better assembly performance, and interference between adjacent lenses can be prevented in the assembly process; in addition, the method is beneficial to slowing down light segregation in the light path of the optical imaging lens, can adjust the field curvature of the optical imaging lens, reduces the sensitivity of the optical imaging lens, and further improves the imaging quality of the optical imaging lens.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the condition that f/R10 < -3.00 is less than-5.00, wherein f is the effective focal length of the optical imaging lens, and R10 is the curvature radius R10 of the image side surface of the fifth lens. In an exemplary embodiment, f and R10 may satisfy-4.50 < f/R10 < -3.50. The ratio between the effective focal length of the optical imaging lens and the curvature radius of the image side surface of the fifth lens is controlled, so that the fifth lens is distributed with reasonable focal power, the light ray integrity at the fifth lens is prevented from being large, and the optical imaging lens can better balance aberration.

In an exemplary embodiment, the optical imaging lens provided by the application can satisfy the conditional expression 0.50 < CT3/T34 < 2.00, wherein the central thickness CT3 of the third lens on the optical axis and the interval distance T34 of the third lens and the fourth lens on the optical axis are satisfied. In an exemplary embodiment, CT3 and T34 may satisfy 0.80 < CT3/T34 < 1.80. The ratio of the center thickness of the third lens on the optical axis to the interval distance between the third lens and the fourth lens on the optical axis is controlled, so that the size of the optical imaging lens can be reduced, the space utilization rate of the optical imaging lens is improved, the assembly difficulty is reduced, in addition, the light deflection can be slowed down, the field curvature of the optical imaging lens is adjusted, the sensitivity of the optical imaging lens is reduced, and the imaging quality of the optical imaging lens is good.

In an exemplary embodiment, the optical imaging lens may further include a diaphragm disposed between the prism and the first lens. In an exemplary embodiment, the diaphragm is disposed between two adjacent lenses. The diaphragm is used to limit the beam and the cross-sectional area of the beam at its position can be controlled.

Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located at the imaging surface.

The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like, the volume of the lens can be effectively reduced, the sensitivity of the lens can be reduced, and the processability of the lens can be improved, so that the optical imaging lens is more beneficial to production and processing and is applicable to portable electronic products.

In the embodiment of the present application, aspherical mirror surfaces are often used as the mirror surfaces of the respective lenses. At least one of the object-side surface of the first lens to the image-side surface of the sixth lens is an aspherical mirror surface. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.

Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may be aspherical. For example, the object-side surface and the image-side surface of the first lens element are aspheric, and the object-side surface of the second lens element is aspheric; for example, the image side surface of the first lens element is aspheric, the object side surface of the second lens element is aspheric, and the image side surface of the third lens element and the object side surface of the fourth lens element are aspheric; for example, the image side surface of the first lens element and the image side surface of the third lens element are aspheric, and the object side surface of the fifth lens element and the image side surface thereof are aspheric. For example, the image side surface of the fifth lens element and the object side surface of the sixth lens element are aspheric. Alternatively, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens may be aspherical surfaces.

Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

Example 1

Referring to fig. 1 to 2D, the optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: the prism E1, the first lens E2, the second lens E3, the third lens E4, the fourth lens E5, the fifth lens E6, the sixth lens E7, and the optical filter E8 may be provided with a stop STO between the prism E1 and the first lens E2. Any two adjacent lenses may have an air space between them.

The reflecting surface of the prism E1 forms an angle of 45 ° with the optical axis, so that the light incident on the object side surface S1 perpendicular to the prism E1 is deflected by 90 ° and then passes through the prism E1. The first lens element E2 has positive refractive power, wherein an object-side surface S4 thereof is convex, and an image-side surface S5 thereof is concave. The second lens element E3 has negative refractive power, wherein an object-side surface S6 thereof is convex, and an image-side surface S7 thereof is concave. The third lens element E4 has negative refractive power, wherein an object-side surface S8 thereof is concave, and an image-side surface S9 thereof is concave. The fourth lens element E5 has positive refractive power, wherein an object-side surface S10 thereof is convex, and an image-side surface S11 thereof is concave. The fifth lens element E6 has positive refractive power, wherein an object-side surface S12 thereof is concave and an image-side surface S13 thereof is convex. The sixth lens element E7 has negative refractive power, wherein an object-side surface S14 thereof is convex and an image-side surface S15 thereof is concave. The filter E8 has an object side surface S16 and an image side surface S17. The optical imaging lens of the present embodiment has an imaging surface S18. Light from the object sequentially passes through the respective surfaces (S1 to S17) and is imaged on the imaging surface S18.

Table 1 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of radius of curvature, thickness, and focal length are all millimeters (mm), specifically as follows:

TABLE 1

Wherein TTL is an on-axis distance from an incident surface S1 of the prism E1 to an imaging surface of the optical imaging lens, imgH is a half of a length of a diagonal line of an effective pixel area on the imaging surface, semi-FOV is a maximum half field angle of the optical imaging lens, fno is an aperture value of the optical imaging lens, and f is an effective focal length of the optical imaging lens.

The object side surface and the image side surface of any one of the first lens element E2 to the sixth lens element E7 of the optical imaging lens are aspheric, and the surface shape x of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The following table 2 gives the higher order coefficients a ₄、A₆、A₈、A₁₀、A₁₂、A₁₄、A₁₆、A₁₈ and a ₂₀ that can be used for the respective aspherical surfaces S4 to S15 in accordance with embodiment one.

TABLE 2

Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of the first embodiment, which represents deviation of converging focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 2B shows a chromatic aberration curve of magnification of the optical imaging lens according to the first embodiment, which represents deviations of different image heights on the imaging plane of the light after the light passes through the optical imaging lens. Fig. 2C shows an astigmatism curve of the optical imaging lens of the first embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2D shows a distortion curve of the optical imaging lens according to the first embodiment, which represents distortion magnitude values corresponding to different angles of view. As can be seen from fig. 2A to 2D, the optical imaging lens according to the first embodiment can achieve good imaging quality.

Example two

An optical imaging lens according to a second embodiment of the present application will be described below with reference to fig. 3 to 4D, and in the present exemplary embodiment and the following embodiments, descriptions of portions similar to those of the first embodiment will be omitted for brevity.

Referring to fig. 3, the optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: the prism E1, the first lens E2, the second lens E3, the third lens E4, the fourth lens E5, the fifth lens E6, the sixth lens E7, and the optical filter E8 may be provided with a stop STO between the prism E1 and the first lens E2. Any two adjacent lenses may have an air space between them.

The reflecting surface of the prism E1 forms an angle of 45 ° with the optical axis, so that the light incident on the object side surface S1 perpendicular to the prism E1 is deflected by 90 ° and then passes through the prism E1. The first lens element E2 has positive refractive power, wherein an object-side surface S4 thereof is convex, and an image-side surface S5 thereof is concave. The second lens element E3 has positive refractive power, wherein an object-side surface S6 thereof is convex, and an image-side surface S7 thereof is convex. The third lens element E4 has negative refractive power, wherein an object-side surface S8 thereof is concave, and an image-side surface S9 thereof is concave. The fourth lens element E5 has negative refractive power, wherein an object-side surface S10 thereof is convex and an image-side surface S11 thereof is concave. The fifth lens element E6 has negative refractive power, wherein an object-side surface S12 thereof is concave and an image-side surface S13 thereof is convex. The sixth lens element E7 has negative refractive power, wherein an object-side surface S14 thereof is convex and an image-side surface S15 thereof is concave. The filter E8 has an object side surface S16 and an image side surface S17. The optical imaging lens of the present embodiment has an imaging surface S18. Light from the object sequentially passes through the respective surfaces (S1 to S17) and is imaged on the imaging surface S18.

Table 3 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 4 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:

TABLE 3 Table 3

TABLE 4 Table 4

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S4

-2.9887E-04

2.2991E-06

5.2423E-06

-1.3533E-06

-9.1673E-08

4.6584E-08

-4.8400E-09

2.0656E-10

-3.1034E-12

S5

-1.9650E-04

-4.7567E-05

1.2320E-04

-5.4121E-05

1.1002E-05

-1.2323E-06

7.8376E-08

-2.6674E-09

3.8091E-11

S6

9.2418E-04

-7.4572E-04

3.4845E-04

-9.3002E-05

1.5008E-05

-1.4610E-06

8.2374E-08

-2.4256E-09

2.8239E-11

S7

-2.8054E-03

2.1765E-03

-6.9034E-04

1.7174E-04

-3.3591E-05

4.6261E-06

-3.9749E-07

1.8736E-08

-3.6657E-10

S8

-4.9133E-04

8.4896E-03

-4.5737E-03

1.3509E-03

-2.4985E-04

2.9689E-05

-2.1960E-06

9.1828E-08

-1.6560E-09

S9

2.9217E-03

1.0070E-02

-6.0110E-03

1.7685E-03

-2.9258E-04

2.6547E-05

-1.0204E-06

-1.1518E-08

1.4413E-09

S10

-7.5947E-03

7.9384E-03

-4.5623E-03

1.5355E-03

-3.1703E-04

4.0909E-05

-3.1945E-06

1.3803E-07

-2.5478E-09

S11

-7.4921E-03

3.7879E-03

-2.0621E-03

7.5267E-04

-1.7691E-04

2.6724E-05

-2.5085E-06

1.3402E-07

-3.1348E-09

S12

-6.1350E-05

-5.4452E-03

5.4316E-03

-3.4906E-03

1.3884E-03

-3.4420E-04

5.1632E-05

-4.2788E-06

1.5004E-07

S13

-3.9937E-02

3.6864E-02

-2.0033E-02

6.6659E-03

-1.3879E-03

1.7589E-04

-1.2450E-05

3.8872E-07

-1.2427E-09

S14

-7.8823E-02

5.7798E-02

-2.9970E-02

9.9306E-03

-2.0908E-03

2.7145E-04

-2.0105E-05

7.0011E-07

-5.4842E-09

S15

-3.6725E-02

1.3129E-02

-4.8617E-03

1.3244E-03

-2.4244E-04

2.8087E-05

-1.8860E-06

6.0785E-08

-4.9540E-10

Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviation of converging focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 4B shows a magnification chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviations of different image heights on an imaging plane after light passes through the optical imaging lens. Fig. 4C shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4D shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 4A to 4D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.

Example III

An optical imaging lens according to a third embodiment of the present application is described below with reference to fig. 5 to 6D.

Referring to fig. 5, the optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: the prism E1, the first lens E2, the second lens E3, the third lens E4, the fourth lens E5, the fifth lens E6, the sixth lens E7, and the optical filter E8 may be provided with a stop STO between the prism E1 and the first lens E2. Any two adjacent lenses may have an air space between them.

The reflecting surface of the prism E1 forms an angle of 45 ° with the optical axis, so that the light incident on the object side surface S1 perpendicular to the prism E1 is deflected by 90 ° and then passes through the prism E1. The first lens element E2 has positive refractive power, wherein an object-side surface S4 thereof is convex, and an image-side surface S5 thereof is convex. The second lens element E3 has positive refractive power, wherein an object-side surface S6 thereof is convex, and an image-side surface S7 thereof is convex. The third lens element E4 has negative refractive power, wherein an object-side surface S8 thereof is concave, and an image-side surface S9 thereof is concave. The fourth lens element E5 has negative refractive power, wherein an object-side surface S10 thereof is convex and an image-side surface S11 thereof is concave. The fifth lens element E6 has negative refractive power, wherein an object-side surface S12 thereof is concave and an image-side surface S13 thereof is convex. The sixth lens element E7 has negative refractive power, wherein an object-side surface S14 thereof is convex and an image-side surface S15 thereof is concave. The filter E8 has an object side surface S16 and an image side surface S17. The optical imaging lens of the present embodiment has an imaging surface S18. Light from the object sequentially passes through the respective surfaces (S1 to S17) and is imaged on the imaging surface S18.

Table 5 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 6 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:

TABLE 5

TABLE 6

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S4

-2.6519E-04

2.9863E-05

-1.1788E-05

2.4438E-06

-3.9468E-07

4.0748E-08

-2.4885E-09

8.0657E-11

-1.0637E-12

S5

-2.8147E-04

2.1293E-04

-6.2423E-05

7.6697E-06

-3.2257E-07

-2.0041E-08

2.6788E-09

-1.0079E-10

1.2639E-12

S6

8.8533E-05

-5.2711E-05

4.2206E-05

-1.7760E-05

4.4142E-06

-6.1336E-07

4.6567E-08

-1.7932E-09

2.7227E-11

S7

-3.2197E-03

4.0859E-03

-1.9717E-03

5.6848E-04

-1.0270E-04

1.1843E-05

-8.5530E-07

3.5677E-08

-6.6206E-10

S8

8.2633E-04

8.3620E-03

-4.7692E-03

1.4332E-03

-2.6533E-04

3.1392E-05

-2.3232E-06

9.8637E-08

-1.8491E-09

S9

3.1364E-03

7.3619E-03

-3.4580E-03

5.6717E-04

5.2107E-05

-3.6222E-05

6.0668E-06

-4.6046E-07

1.3510E-08

S10

-7.2930E-03

4.3059E-03

-4.4763E-04

-7.2129E-04

4.1868E-04

-1.0813E-04

1.5214E-05

-1.1313E-06

3.4958E-08

S11

-7.0308E-03

1.8073E-03

1.9817E-04

-6.3890E-04

3.3270E-04

-8.8113E-05

1.3104E-05

-1.0418E-06

3.4625E-08

S12

1.4002E-03

-4.9697E-03

4.7220E-03

-2.9189E-03

1.0138E-03

-1.9918E-04

2.1165E-05

-1.0253E-06

1.1002E-08

S13

-3.4245E-03

7.4226E-04

3.4788E-03

-4.3045E-03

2.0364E-03

-5.0501E-04

6.9568E-05

-5.0367E-06

1.4910E-07

S14

-3.9739E-02

1.6055E-02

-2.7139E-03

-2.9595E-03

2.1402E-03

-6.3718E-04

1.0037E-04

-8.2271E-06

2.7747E-07

S15

-3.5757E-02

1.2798E-02

-5.1004E-03

1.4568E-03

-2.4765E-04

1.9357E-05

3.6075E-07

-1.6602E-07

8.0659E-09

Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviation of converging focal points of light rays of different wavelengths after passing through the optical imaging lens. Fig. 6B shows a chromatic aberration of magnification curve of the optical imaging lens of the present embodiment, which represents the deviation of different image heights on the imaging plane after the light passes through the optical imaging lens. Fig. 6C shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6D shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 6A to 6D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.

Example IV

An optical imaging lens according to a fourth embodiment of the present application is described below with reference to fig. 7 to 8D.

Referring to fig. 7, the optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: the prism E1, the first lens E2, the second lens E3, the third lens E4, the fourth lens E5, the fifth lens E6, the sixth lens E7, and the optical filter E8 may be provided with a stop STO between the prism E1 and the first lens E2. Any two adjacent lenses may have an air space between them.

The reflecting surface of the prism E1 forms an included angle of 45 degrees with the optical axis, so that the light rays incident on the object side surface perpendicular to the prism E1 are deflected by 90 degrees and then pass through the prism E1. The first lens element E2 has positive refractive power, wherein an object-side surface S4 thereof is convex, and an image-side surface S5 thereof is concave. The second lens element E3 has positive refractive power, wherein an object-side surface S6 thereof is convex, and an image-side surface S7 thereof is concave. The third lens element E4 has negative refractive power, wherein an object-side surface S8 thereof is concave, and an image-side surface S9 thereof is concave. The fourth lens element E5 has positive refractive power, wherein an object-side surface S10 thereof is convex, and an image-side surface S11 thereof is concave. The fifth lens element E6 has positive refractive power, wherein an object-side surface S12 thereof is concave and an image-side surface S13 thereof is convex. The sixth lens element E7 has negative refractive power, wherein an object-side surface S14 thereof is convex and an image-side surface S15 thereof is concave. The filter E8 has an object side surface S16 and an image side surface S17. The optical imaging lens of the present embodiment has an imaging surface S18. Light from the object sequentially passes through the respective surfaces (S1 to S17) and is imaged on the imaging surface S18.

Table 7 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 8 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:

TABLE 7

/>

TABLE 8

Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the converging focus after light rays of different wavelengths pass through the optical imaging lens. Fig. 8B shows a magnification chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviations of different image heights on an imaging plane after light passes through the optical imaging lens. Fig. 8C shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8D shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 8A to 8D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.

Example five

An optical imaging lens according to a fifth embodiment of the present application is described below with reference to fig. 9 to 10D.

Referring to fig. 9, the optical imaging lens of the present embodiment sequentially includes, along an optical axis from an object side to an image side: the prism E1, the first lens E2, the second lens E3, the third lens E4, the fourth lens E5, the fifth lens E6, the sixth lens E7, and the optical filter E8 may be provided with a stop STO between the prism E1 and the first lens E2. Any two adjacent lenses may have an air space between them.

The reflecting surface of the prism E1 forms an included angle of 45 degrees with the optical axis, so that the light rays incident on the object side surface perpendicular to the prism E1 are deflected by 90 degrees and then pass through the prism E1. The first lens element E2 has positive refractive power, wherein an object-side surface S4 thereof is convex, and an image-side surface S5 thereof is concave. The second lens element E3 has positive refractive power, wherein an object-side surface S6 thereof is convex, and an image-side surface S7 thereof is convex. The third lens element E4 has negative refractive power, wherein an object-side surface S8 thereof is concave, and an image-side surface S9 thereof is concave. The fourth lens element E5 has positive refractive power, wherein an object-side surface S10 thereof is convex, and an image-side surface S11 thereof is concave. The fifth lens element E6 has positive refractive power, wherein an object-side surface S12 thereof is concave and an image-side surface S13 thereof is convex. The sixth lens element E7 has negative refractive power, wherein an object-side surface S14 thereof is convex and an image-side surface S15 thereof is concave. The filter E8 has an object side surface S16 and an image side surface S17. The optical imaging lens of the present embodiment has an imaging surface S18. Light from the object sequentially passes through the respective surfaces (S1 to S17) and is imaged on the imaging surface S18.

Table 9 shows a basic parameter table of the optical imaging lens of the present embodiment, in which the units of the radius of curvature, the thickness, and the focal length are all millimeters (mm), and table 10 shows the higher order coefficients of the respective aspherical surfaces usable for the optical imaging lens of the present embodiment, in which the respective aspherical surface forms can be defined by the foregoing formula (1), specifically as follows:

TABLE 9

Table 10

Face number

A4

A6

A8

A10

A12

A14

A16

A18

A20

S4

-2.3991E-04

6.9075E-07

2.3751E-06

-1.3122E-06

1.8757E-07

-1.3199E-08

4.5147E-10

-6.3399E-12

1.6909E-14

S5

-2.7883E-04

2.0533E-04

-5.4809E-05

3.9194E-06

5.8745E-07

-1.3815E-07

1.1073E-08

-4.0902E-10

5.8350E-12

S6

7.8074E-05

-9.3782E-06

6.0717E-06

-2.3865E-06

6.4692E-07

-6.2479E-08

-8.5265E-10

4.2302E-10

-1.6126E-11

S7

-2.6422E-03

3.0728E-03

-1.3392E-03

3.7947E-04

-7.4268E-05

1.0079E-05

-8.9654E-07

4.6349E-08

-1.0422E-09

S8

1.1459E-03

7.9332E-03

-4.5951E-03

1.4347E-03

-2.8536E-04

3.7493E-05

-3.1578E-06

1.5429E-07

-3.3179E-09

S9

2.2955E-03

8.9761E-03

-4.7502E-03

1.1284E-03

-9.6050E-05

-1.1314E-05

3.4211E-06

-2.9761E-07

9.1025E-09

S10

-8.2175E-03

5.6741E-03

-1.2607E-03

-4.9624E-04

3.9600E-04

-1.1009E-04

1.5834E-05

-1.1744E-06

3.5646E-08

S11

-7.2469E-03

2.0930E-03

1.3803E-04

-6.9953E-04

3.7481E-04

-9.9225E-05

1.4516E-05

-1.1223E-06

3.5949E-08

S12

3.8657E-04

-3.4559E-03

3.7962E-03

-2.7649E-03

1.1146E-03

-2.5944E-04

3.4708E-05

-2.4607E-06

7.0493E-08

S13

-5.3709E-03

4.5915E-03

3.0714E-04

-2.9644E-03

1.7575E-03

-4.8942E-04

7.3784E-05

-5.8186E-06

1.8843E-07

S14

-4.0334E-02

1.8660E-02

-5.5938E-03

-1.3473E-03

1.6212E-03

-5.3919E-04

8.9919E-05

-7.6713E-06

2.6726E-07

S15

-3.4851E-02

1.1774E-02

-4.4538E-03

1.2116E-03

-1.9159E-04

1.1802E-05

9.1031E-07

-1.8168E-07

7.9544E-09

Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of the present embodiment, which represents the deviation of the converging focus after light rays of different wavelengths pass through the optical imaging lens. Fig. 10B shows a magnification chromatic aberration curve of the optical imaging lens of the present embodiment, which represents deviations of different image heights on an imaging plane after light passes through the optical imaging lens. Fig. 10C shows an astigmatism curve of the optical imaging lens of the present embodiment, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10D shows a distortion curve of the optical imaging lens of the present embodiment, which represents distortion magnitude values corresponding to different image heights. As can be seen from fig. 10A to 10D, the optical imaging lens provided in the present embodiment can achieve good imaging quality.

In summary, the first to fifth embodiments correspond to satisfy the relationship shown in table 11 below.

TABLE 11

Conditional\embodiment	1	2	3	4	5
						PL(mm)	0.81	0.92	0.87	0.57	0.90
TTL/ImgH	6.38	6.40	6.52	6.43	6.42
						|f/f1|+|f/f3|	3.91	3.30	4.41	4.00	4.33
100×PL/ImgH	18.66	21.22	20.48	13.57	20.83
						R9/R10	1.51	0.91	1.86	1.81	1.83
(CT1+CT2)/(T12+T23)	5.31	6.92	5.01	5.37	5.05
						SAG41/SAG42	2.83	1.43	2.65	3.38	2.56
10×T45/TTL	1.85	2.12	1.56	1.71	1.53
						f/R10	4.31	3.71	3.91	3.70	3.94
CT3/T34	1.76	0.91	0.90	0.84	0.96

However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although six lenses are described as an example in the embodiment, the optical imaging lens is not limited to include one prism and six lenses. The optical imaging lens may also include other numbers of lenses, if desired.

In an exemplary embodiment, the present application also provides an image pickup apparatus provided with an electronic photosensitive element for imaging, which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The image pickup apparatus may be a stand-alone image pickup device such as a digital camera, or may be an image pickup module integrated on a mobile electronic device such as a cellular phone. The image pickup apparatus is equipped with the optical imaging lens described above.

Exemplary embodiments of the present application are described above with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the above-described embodiments are examples for illustrative purposes only and are not intended to limit the scope of the present application. Any modifications, equivalents, and so forth that come within the teachings of the application and the scope of the claims are intended to be included within the scope of the application as claimed.

Claims (8)

1. The optical imaging lens is characterized by sequentially comprising, from an object side to an image side along an optical axis:

the included angle between the reflecting surface of the prism and the optical axis is 45 degrees;

A diaphragm;

A first lens with positive focal power, the object side surface of which is a convex surface;

a second lens with optical power, the object side surface of which is a convex surface;

the object side surface of the third lens with negative focal power is a concave surface, and the image side surface of the third lens is a concave surface;

A fourth lens element with optical power having a convex object-side surface and a concave image-side surface;

a fifth lens element with optical power having a concave object-side surface and a convex image-side surface;

A sixth lens element with negative refractive power having a convex object-side surface and a concave image-side surface;

The number of lenses of the optical imaging lens with focal power is six;

An on-axis distance PL from an image side of the prism to an object side of the first lens satisfies 0.30mm < PL < 1.00mm;

the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens meet 3.00 < |f/f1|+|f/f3| < 5.00.

The interval distance T45 between the fourth lens and the fifth lens on the optical axis and the axial distance TTL between the incident surface of the prism and the imaging surface of the optical imaging lens satisfy 1.00 < 10 xT 45/TTL < 2.50.

2. The optical imaging lens of claim 1, wherein an on-axis distance TTL from an incident surface of the prism to an imaging surface of the optical imaging lens and a half of a diagonal length ImgH of an effective pixel area on the imaging surface of the optical imaging lens satisfy 6.00 < TTL/ImgH is less than or equal to 6.52.

3. The optical imaging lens as claimed in claim 1, wherein an on-axis distance PL from an image side surface of the prism to an object side surface of the first lens and a half of a diagonal length ImgH of an effective pixel region on an imaging surface of the optical imaging lens satisfy 10.00 < 100 x PL/ImgH < 25.00.

4. The optical imaging lens as claimed in claim 1, wherein a radius of curvature R9 of an object side surface of the fifth lens and a radius of curvature R10 of an image side surface of the fifth lens satisfy 0.50 < R9/R10 < 2.00.

5. The optical imaging lens according to claim 1, wherein a center thickness CT1 of the first lens on the optical axis, a center thickness CT2 of the second lens on the optical axis, a separation distance T12 of the first lens and the second lens on the optical axis, and a separation distance T23 of the second lens and the third lens on the optical axis satisfy 5.00 < (CT 1+ct 2)/(T12-T23) < 7.00.

6. The optical imaging lens according to claim 1, wherein an on-axis distance SAG41 from an intersection point of the object side surface of the fourth lens and the optical axis to an effective radius vertex of the object side surface of the fourth lens and an on-axis distance SAG42 from an intersection point of the image side surface of the fourth lens and the optical axis to an effective radius vertex of the image side surface of the fourth lens satisfy 1.00 < SAG41/SAG42 < 3.50.

7. The optical imaging lens of claim 1, wherein an effective focal length f of the optical imaging lens and a radius of curvature R10 of an image side surface of the fifth lens satisfy-5.00 < f/R10 < -3.00.

8. The optical imaging lens according to claim 1, wherein a center thickness CT3 of the third lens on the optical axis and a separation distance T34 of the third lens and the fourth lens on the optical axis satisfy 0.50 < CT3/T34 < 2.00.