CN211086762U - Image pickup lens assembly - Google Patents
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- CN211086762U CN211086762U CN201921821363.6U CN201921821363U CN211086762U CN 211086762 U CN211086762 U CN 211086762U CN 201921821363 U CN201921821363 U CN 201921821363U CN 211086762 U CN211086762 U CN 211086762U
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Abstract
The present application discloses a photographing lens assembly, sequentially comprising, from an object side to an image side along an optical axis: the image side surface of the first lens is a concave surface; a diaphragm; the image side surface of the second lens is a convex surface; a third lens having a negative optical power; the image side surface of the fourth lens is a convex surface; a fifth lens element with negative refractive power having a convex object-side surface and a concave image-side surface; half of the Semi-FOV of the maximum field angle of the image pickup lens group and the total effective focal length f of the image pickup lens group satisfy 5.00mm＜tan4(Semi-FOV) × f < 6.00mm, and the maximum effective radius DT12 of the image-side surface of the first lens and the maximum effective radius DT52 of the image-side surface of the fifth lens satisfy DT52/DT12 > 3.45.
Description
Technical Field
The present application relates to the field of optical elements, and more particularly, to a photographing lens assembly.
Background
In recent years, with the rapid development of portable intelligent electronic devices, the functions of the camera modules arranged on the portable intelligent electronic devices are more and more perfect, and the performances of the camera modules are more and more strong. For example, the camera shooting function of the mobile phone is more and more perfect, and the trend of replacing the traditional smart camera by the mobile phone is more and more obvious. In order to improve the camera performance of the mobile phone, the mobile phone of the mainstream in the industry generally adopts a combined lens mode, including an ultrathin large-image-plane lens, a wide-angle lens and a telephoto lens. The wide-angle lens generally has a larger aperture, and the large-aperture lens is difficult to be configured under the screen of the mobile phone.
In order to satisfy the demand for miniaturization and to satisfy the imaging requirements, there is a need for a photographing lens group having a small head and a large wide angle characteristic.
SUMMERY OF THE UTILITY MODEL
The present application provides a photographing lens assembly applicable to a portable electronic product that can solve at least or partially at least one of the above-mentioned disadvantages of the related art.
The present application provides a photographing lens assembly, sequentially comprising, from an object side to an image side along an optical axis: the image side surface of the first lens with negative focal power can be a concave surface; a diaphragm; the image side surface of the second lens with positive focal power can be a convex surface; a third lens having a negative optical power; the image side surface of the fourth lens with positive focal power can be a convex surface; the object side surface of the fifth lens with negative focal power can be a convex surface, and the image side surface of the fifth lens can be a concave surface.
In one embodiment, a Semi-FOV of a maximum field angle of the image pickup lens group and a total effective focal length f of the image pickup lens group satisfy 5.00mm < tan4(Semi-FOV)×f＜6.00mm；
In one embodiment, the maximum effective radius DT12 of the image-side surface of the first lens and the maximum effective radius DT52 of the image-side surface of the fifth lens satisfy DT52/DT12 > 3.45.
In one embodiment, a distance TT L on the optical axis from the object side surface of the first lens to the imaging surface of the image pickup lens group, ImgH which is a half of the diagonal length of the effective pixel area on the imaging surface, and an effective focal length f2 of the second lens satisfy 3.00mm < TT L/ImgH × f2 < 5.00 mm.
In one embodiment, a radius of curvature R9 of the object-side surface of the fifth lens and a radius of curvature R10 of the image-side surface of the fifth lens satisfy 2.50 < (R9+ R10)/(R9-R10) < 4.00.
In one embodiment, an effective focal length f4 of the fourth lens, a radius of curvature R9 of an object-side surface of the fifth lens, and a total effective focal length f of the image pickup lens group satisfy 2.00mm < f4/R9 × f < 3.50 mm.
In one embodiment, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens satisfy 1.00 < f1/f3 < 2.00.
In one embodiment, a sum ∑ AT of a distance TD on an optical axis between an object-side surface of the first lens and an image-side surface of the fifth lens and a distance between any two adjacent lenses of the first lens and the fifth lens satisfies ∑ AT/TD < 0.23.
In one embodiment, the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy 9.00 < (DT42+ DT41)/(DT42-DT41) < 13.00.
In one embodiment, an on-axis distance SAG22 between an on-axis distance between an image-side surface of the second lens and a focal point of the optical axis to an effective radius vertex of the image-side surface of the second lens and an on-axis distance SAG31 between an intersection of an object-side surface of the third lens and the optical axis to an effective radius vertex of the object-side surface of the third lens satisfies 1.50 < (SAG22+ SAG31)/(SAG22-SAG31) < 3.50.
In one embodiment, the effective focal length f1 of the first lens and the radius of curvature R4 of the image side surface of the second lens satisfy 3.00 < f1/R4 < 6.00.
In one embodiment, a central thickness CT2 of 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 2.00 < CT2/T23 < 3.50.
In one embodiment, the maximum field angle FOV of the imaging lens group satisfies FOV > 104.5 °.
In one embodiment, a central thickness CT1 of the first lens on the optical axis and a central thickness CT4 of the fourth lens on the optical axis satisfy 3.50 < CT4/CT1 < 4.50.
This application has adopted five lens, through the focal power of rational distribution each lens, face type, the center thickness of each lens and the epaxial interval between each lens etc for above-mentioned camera lens group has at least one beneficial effect such as little head, big wide angle.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic configuration diagram of a photographing lens group according to embodiment 1 of the present application; fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image capturing lens group of embodiment 1;
fig. 3 shows a schematic configuration diagram of a photographing lens group according to embodiment 2 of the present application; fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image capturing lens group of embodiment 2;
fig. 5 is a schematic view showing the structure of a photographing lens group according to embodiment 3 of the present application; fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the image capturing lens group of embodiment 3;
fig. 7 is a schematic view showing the structure of a photographing lens group according to embodiment 4 of the present application; fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the image capturing lens group of embodiment 4;
fig. 9 is a schematic view showing the structure of a photographing lens group according to embodiment 5 of the present application; fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the image capturing lens group of embodiment 5; and
fig. 11 is a schematic view showing the structure of a photographing lens group according to embodiment 6 of the present application; fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the image capturing lens group of embodiment 6.
Detailed Description
For a better understanding of the present application, various aspects of the present 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 present application and does not limit the scope of the present 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 this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and 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, it means that 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. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" 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. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present 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 the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
The image pickup lens group according to an exemplary embodiment of the present application may include, for example, five lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The five lenses are arranged in sequence from the object side to the image side along the optical axis. Any adjacent two lenses among the first to fifth lenses may have an air space therebetween.
In an exemplary embodiment, the first lens has a negative optical power, and the image-side surface thereof may be concave; the second lens has positive focal power, and the image side surface of the second lens can be a convex surface; the third lens has negative focal power; the fourth lens has positive focal power, and the image side surface of the fourth lens can be a convex surface; the fifth lens element has negative power, and has a convex object-side surface and a concave image-side surface.
Illustratively, the above-mentioned photographing lens group may further include at least one diaphragm. The diaphragm may be disposed at an appropriate position as needed, for example, between the first lens and the second lens.
Optionally, the above-mentioned image pickup lens group may further include a filter for correcting color deviation and/or a protective glass for protecting the photosensitive element on the image plane.
The low-order aberration of the camera lens group is effectively balanced and controlled by reasonably controlling the positive and negative distribution of the focal power of each component of the camera lens group and the curvature of the lens surface. The image side surface of the second lens is a convex surface, and the third lens has negative focal power, which is beneficial to improving the maximum field angle of the shooting lens group, better converging the light rays at the shooting lens group and improving the imaging quality of the shooting lens group. The fifth lens with positive focal power and negative focal power has a convex object side surface and a concave image side surface, which is beneficial to converging light rays, is beneficial to improving the spherical aberration of the camera lens group, prevents the light rays of the marginal field of view from excessively diverging, and also enables the camera lens group to have better coma correction capability.
In an exemplary embodiment, the image pickup lens group of the present application may satisfy the conditional expression 5.00mm < tan4(Semi-FOV) × f < 6.00mm, wherein Semi-FOV is half of the maximum field angle of the image-taking lens group and f is the total effective focal length of the image-taking lens group, more specifically, Semi-FOV and f satisfy 5.05mm < tan4(Semi-FOV) × f < 5.75 mm. the imaging effect of the camera lens group with large field angle and large image surface is facilitated by matching the maximum field angle of the camera lens group with the total effective focal length.
In an exemplary embodiment, the image capturing lens group of the present application may satisfy the conditional expression DT52/DT12 > 3.45, where DT12 is the maximum effective radius of the image side surface of the first lens, and DT52 is the maximum effective radius of the image side surface of the fifth lens. More specifically, DT12 and DT52 satisfy 3.45 < DT52/DT12 < 3.60. By controlling the ratio of the maximum effective radius of the image-side surface of the first lens element to the maximum effective radius of the image-side surface of the fifth lens element, the focal power of the image capturing lens assembly can be better distributed, and the image capturing lens assembly can have a large field angle and a small object-side end. The application provides a camera lens group is suitable for setting up in cell-phone screen below.
In an exemplary embodiment, the image pickup lens group of the present application may satisfy the conditional expression 3.00mm < TT L/ImgH × f2 < 5.00mm, where TT L is a distance on the optical axis from the object side surface of the first lens to the imaging surface of the image pickup lens group, ImgH is a half of a diagonal length of an effective pixel region on the imaging surface, and f2 is an effective focal length of the second lens, and more specifically, TT L, ImgH, and f2 may satisfy 3.45mm < TT L/ImgH × f2 < 4.65 mm.
In an exemplary embodiment, the image pickup lens group of the present application may satisfy the conditional expression 2.50 < (R9+ R10)/(R9-R10) < 4.00, where 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. More specifically, R9 and R10 may satisfy 2.70 < (R9+ R10)/(R9-R10) < 3.50. The curvature radius ratio of the two mirror surfaces of the fifth lens is controlled, so that the surface type of the fifth lens is controlled, the fifth lens is prevented from being too bent and processing difficulty is avoided, better converging light is facilitated, and the practicability of the camera lens group is effectively improved.
In an exemplary embodiment, the image capturing lens group of the present application may satisfy the conditional expression 2.00mm < f4/R9 × f < 3.50mm, where f4 is an effective focal length of the fourth lens element, R9 is a radius of curvature of an object-side surface of the fifth lens element, and f is a total effective focal length of the image capturing lens group, and more particularly, f4, R9, and f may satisfy 2.30mm < f4/R9 × f < 3.05 mm.
In an exemplary embodiment, the image pickup lens group of the present application may satisfy the conditional expression 1.00 < f1/f3 < 2.00, where f1 is an effective focal length of the first lens and f3 is an effective focal length of the third lens. More specifically, f1 and f3 satisfy 1.05 < f1/f3 < 1.65. The off-axis aberration balance of the camera lens group is facilitated by controlling the ratio of the effective focal length of the first lens and the effective focal length of the third lens.
In an exemplary embodiment, the image pickup lens group of the present application may satisfy the conditional expression ∑ AT/TD < 0.23, where TD is a distance on an optical axis from an object side surface of the first lens to an image side surface of the fifth lens, ∑ AT is a sum of distances on an optical axis from any adjacent two of the first to fifth lenses having power, exemplarily ∑ AT T12+ T23+ T34+ T45, T12 is an air space of the first lens and the second lens, T23 is an air space of the second lens and the third lens, T34 is an air space of the third lens and the fourth lens, and T45 is an air space of the fourth lens and the fifth lens, more specifically, TD and ∑ AT may satisfy 0.16 < ∑ AT/TD < 0.23.
In an exemplary embodiment, the image pickup lens group of the present application may satisfy the conditional expression 9.00 < (DT42+ DT41)/(DT42-DT41) < 13.00, where DT41 is the maximum effective radius of the object-side surface of the fourth lens and DT42 is the maximum effective radius of the image-side surface of the fourth lens. More specifically, DT41 and DT42 may satisfy 9.03 < (DT42+ DT41)/(DT42-DT41) < 12.50. The maximum effective radius matching of the two sides of the fourth lens is controlled, so that the fourth lens has good processing performance, and the spherical aberration of the camera lens group can be effectively controlled.
In an exemplary embodiment, the image pickup lens group of the present application may satisfy the conditional expression 1.50 < (SAG22+ SAG31)/(SAG22-SAG31) < 3.50, where SAG22 is an on-axis distance between an image side surface of the second lens and a focal point of an optical axis to an effective radius vertex of the image side surface of the second lens, and SAG31 is an on-axis distance between an intersection point of an object side surface of the third lens and the optical axis to an effective radius vertex of the object side surface of the third lens. More specifically, SAG22 and SAG31 may satisfy 1.80 < (SAG22+ SAG31)/(SAG22-SAG31) < 3.35. The rise of the image side surface of the second lens is matched with the rise of the object side surface of the third lens, so that the incident angle of the chief ray on the image side surface of the second lens and the incident angle of the chief ray on the object side surface of the third lens are effectively reduced, the matching degree of the shooting lens group and the photosensitive chip is improved, and the shooting lens group has higher assembling stability.
In an exemplary embodiment, the image capturing lens group of the present application may satisfy the conditional expression 3.00 < f1/R4 < 6.00, where f1 is an effective focal length of the first lens and R4 is a radius of curvature of an image side surface of the second lens. More specifically, f1 and R4 may satisfy 3.60 < f1/R4 < 5.75. By controlling the ratio of the effective focal length of the first lens element to the curvature radius of the image-side surface of the second lens element, the distribution of the focal power of the image capturing lens assembly is balanced, the third-order astigmatism of the image capturing lens assembly is controlled, and the astigmatism generated by the second lens element and the lens element in the object-side direction of the second lens element is balanced with the astigmatism generated by the lens element in the image-side direction of the second lens element, so that the image capturing lens assembly has good imaging quality.
In an exemplary embodiment, the image pickup lens group of the present application may satisfy the conditional expression 2.00 < CT2/T23 < 3.50, where CT2 is a center thickness of the second lens on the optical axis and T23 is a separation distance of the second lens and the third lens on the optical axis. More specifically, CT2 and T23 satisfy 2.10 < CT2/T23 < 3.20. By controlling the ratio of the central thickness of the second lens element to the air space in the image-side direction, the curvature of field of the image capturing lens assembly can be controlled, and the off-axis field of view of the image capturing lens assembly can obtain good imaging quality.
In an exemplary embodiment, the image capturing lens group of the present application may satisfy the conditional expression FOV > 104.5 °, where FOV is the maximum angle of view of the image capturing lens group. More specifically, the FOV may satisfy 104.5 ° < FOV < 110 °. By controlling the maximum field angle of the camera lens group, the camera lens group has wider imaging range. The photographing lens group of the present application has an advantage of being used as a wide-angle lens.
In an exemplary embodiment, the photographing lens group of the present application may satisfy the conditional expression 3.50 < CT4/CT1 < 4.50, where CT1 is a central thickness of the first lens on the optical axis and CT4 is a central thickness of the fourth lens on the optical axis. More specifically, CT1 and CT4 satisfy 3.75 < CT4/CT1 < 4.30. Through controlling the ratio of the fourth lens and the first lens, the space occupation ratio of the first lens and the fourth lens in the camera lens group is controlled, the manufacturability of each lens during assembly is ensured to be better, and the miniaturization of the camera lens group is realized.
The image pickup lens group according to the above-described embodiment of the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the camera lens group can be effectively reduced, the sensitivity of the camera lens group is reduced, and the machinability of the camera lens group is improved, so that the camera lens group is more beneficial to production and processing and is suitable for portable electronic products. Meanwhile, the imaging lens assembly of the present application further has excellent optical performance such as a small head facing the object side direction, a large field angle, and high resolution.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the fifth lens is an aspherical mirror surface. The aspheric 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 better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the 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, and the fifth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, and fifth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting the imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiment, the image pickup lens group is not limited to include five lenses. The image pickup lens group may further include other numbers of lenses if necessary.
Specific examples of the image pickup lens group applicable to the above embodiments are further described below with reference to the drawings.
Example 1
An image capturing lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an image capturing lens group according to embodiment 1 of the present application.
As shown in fig. 1, the image capturing lens assembly, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The image taking lens group has an image plane S13, and light from the subject passes through the respective surfaces S1 to S12 in order and is finally imaged on the image plane S13. Table 1 shows a basic parameter table of the image pickup lens group of embodiment 1, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 1
In embodiment 1, the value of the total effective focal length f of the image-taking lens group is 1.89mm, the value of the f-number Fno of the image-taking lens group is 2.23, the value of the on-axis distance TT L from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 3.99mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.30mm, and the value of the half Semi-FOV of the maximum angle of view is 52.4 °.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 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 i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients A that can be used for the aspherical mirror surfaces S1 to S10 in example 14、A6、A8、A10、A12、A14、A16、A18And A20。
TABLE 2
Fig. 2A shows an on-axis chromatic aberration curve of the image-taking lens group of embodiment 1, which represents the convergent focus deviation of light rays of different wavelengths after passing through the image-taking lens group. Fig. 2B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 1. Fig. 2C shows a distortion curve of the image capturing lens group of embodiment 1, which represents distortion magnitude values corresponding to different angles of view. Fig. 2D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the imaging lens group. As can be seen from fig. 2A to 2D, the image capturing lens assembly of embodiment 1 can achieve good image quality.
Example 2
An image capturing lens group according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic configuration diagram of a photographing lens group according to embodiment 2 of the present application.
As shown in fig. 3, the image capturing lens assembly, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a concave object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The image taking lens group has an image plane S13, and light from the subject passes through the respective surfaces S1 to S12 in order and is finally imaged on the image plane S13.
In embodiment 2, the value of the total effective focal length f of the image-taking lens group is 1.84mm, the value of the f-number Fno of the image-taking lens group is 2.22, the value of the on-axis distance TT L from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 4.00mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.30mm, and the value of the half Semi-FOV of the maximum angle of view is 52.4 °.
Table 3 shows a basic parameter table of the image pickup lens group of embodiment 2, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 4 shows high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 3
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 4.6907E-01 | -1.7221E-01 | -2.5245E+00 | 2.5296E+01 | -1.2131E+02 | 3.4176E+02 | -5.7365E+02 | 5.2847E+02 | -2.0941E+02 |
| S2 | 1.1856E+00 | -4.0854E+00 | 7.5815E+01 | -9.3540E+02 | 7.6661E+03 | -4.0358E+04 | 1.3180E+05 | -2.4353E+05 | 1.9104E+05 |
| S3 | -5.3079E-02 | -2.4243E+00 | 7.3974E+01 | -1.6810E+03 | 2.2392E+04 | -1.8535E+05 | 9.2552E+05 | -2.5544E+06 | 2.9849E+06 |
| S4 | -3.1448E-01 | -6.7506E-01 | 6.4298E+00 | -7.4522E+01 | 3.6427E+02 | -8.6334E+02 | 1.8498E+02 | 3.0385E+03 | -4.3098E+03 |
| S5 | -5.7894E-01 | 9.7015E-01 | -4.9587E+00 | 2.7167E+01 | -1.2468E+02 | 3.7032E+02 | -6.7364E+02 | 7.0430E+02 | -3.2130E+02 |
| S6 | -4.7588E-01 | 2.1570E-01 | 1.2462E+00 | -4.4518E+00 | 5.0628E+00 | 1.8032E+00 | -1.0238E+01 | 9.5370E+00 | -2.7980E+00 |
| S7 | 1.8395E-01 | -1.0909E+00 | 3.2896E+00 | -3.7496E+00 | -1.6534E+00 | 1.0483E+01 | -1.3493E+01 | 7.9657E+00 | -1.8341E+00 |
| S8 | 9.7932E-01 | -4.2949E+00 | 1.3925E+01 | -3.3045E+01 | 5.4541E+01 | -6.0157E+01 | 4.2151E+01 | -1.6849E+01 | 2.9072E+00 |
| S9 | -7.2096E-01 | 6.8555E-01 | -4.2372E-01 | -2.1974E-01 | 7.6092E-01 | -7.4426E-01 | 3.6911E-01 | -9.1272E-02 | 8.7788E-03 |
| S10 | -3.0375E-01 | 2.4244E-01 | -1.4225E-01 | 4.3593E-02 | 5.2072E-03 | -1.1036E-02 | 4.5450E-03 | -8.6421E-04 | 6.5545E-05 |
TABLE 4
Fig. 4A shows an on-axis chromatic aberration curve of the image-taking lens group of embodiment 2, which represents the convergent focus deviation of light rays of different wavelengths after passing through the image-taking lens group. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 2. Fig. 4C shows a distortion curve of the image capturing lens group of embodiment 2, which represents distortion magnitude values corresponding to different angles of view. Fig. 4D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the imaging lens group. As can be seen from fig. 4A to 4D, the image capturing lens assembly according to embodiment 2 can achieve good image quality.
Example 3
A photographing lens group according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural view of a photographing lens group according to embodiment 3 of the present application.
As shown in fig. 5, the image capturing lens assembly, in order from an object side to an image side, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.
The first lens element E1 has negative power, and has a concave object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The image taking lens group has an image plane S13, and light from the subject passes through the respective surfaces S1 to S12 in order and is finally imaged on the image plane S13.
In embodiment 3, the value of the total effective focal length f of the image-taking lens group is 1.78mm, the value of the f-number Fno of the image-taking lens group is 2.23, the value of the on-axis distance TT L from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 4.00mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.30mm, and the value of the half Semi-FOV of the maximum angle of view is 52.4 °.
Table 5 shows a basic parameter table of the image pickup lens group of embodiment 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 shows high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 5
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 6.5428E-01 | -1.2644E+00 | 5.0347E+00 | -1.7539E+01 | 4.3274E+01 | -7.0013E+01 | 6.9280E+01 | -3.9640E+01 | 9.9692E+00 |
| S2 | 1.2453E+00 | -5.5852E+00 | 9.8627E+01 | -1.2181E+03 | 1.0018E+04 | -5.2588E+04 | 1.6986E+05 | -3.0761E+05 | 2.3636E+05 |
| S3 | -1.5937E-02 | -6.0568E-01 | -9.1792E-01 | 8.2049E+01 | -2.9677E+03 | 3.7972E+04 | -2.4682E+05 | 8.1446E+05 | -1.0903E+06 |
| S4 | -3.5780E-01 | -8.0314E-01 | 1.0943E+01 | -1.2736E+02 | 7.0055E+02 | -2.1068E+03 | 2.8730E+03 | 2.7359E+01 | -3.0554E+03 |
| S5 | -7.7094E-01 | 2.3783E+00 | -1.9497E+01 | 1.1979E+02 | -4.8598E+02 | 1.1973E+03 | -1.6581E+03 | 1.1786E+03 | -3.3624E+02 |
| S6 | -6.4982E-01 | 1.4672E+00 | -5.8906E+00 | 2.3349E+01 | -6.6492E+01 | 1.2032E+02 | -1.3543E+02 | 9.3084E+01 | -3.0999E+01 |
| S7 | 7.9272E-02 | -6.3334E-01 | 2.2451E+00 | -3.7312E+00 | 7.5786E+00 | -2.2935E+01 | 4.0358E+01 | -3.2658E+01 | 9.7682E+00 |
| S8 | 5.7278E-01 | -1.8169E+00 | 4.3009E+00 | -7.4957E+00 | 9.0477E+00 | -7.2449E+00 | 4.0549E+00 | -1.6484E+00 | 3.7202E-01 |
| S9 | -7.8038E-01 | 1.1499E+00 | -2.0968E+00 | 3.3461E+00 | -3.9563E+00 | 3.1746E+00 | -1.6052E+00 | 4.5556E-01 | -5.4772E-02 |
| S10 | -3.0874E-01 | 2.0399E-01 | -5.5844E-02 | -5.5077E-02 | 7.7511E-02 | -4.4663E-02 | 1.4004E-02 | -2.3306E-03 | 1.6199E-04 |
TABLE 6
Fig. 6A shows an on-axis chromatic aberration curve of the image-taking lens group of embodiment 3, which represents the convergent focus deviation of light rays of different wavelengths after passing through the image-taking lens group. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 3. Fig. 6C shows a distortion curve of the image capturing lens group of embodiment 3, which represents distortion magnitude values corresponding to different angles of view. Fig. 6D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the imaging lens group. As can be seen from fig. 6A to 6D, the image capturing lens assembly of embodiment 3 can achieve good image quality.
Example 4
A photographing lens group according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of a photographing lens group according to embodiment 4 of the present application.
As shown in fig. 7, the image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The image taking lens group has an image plane S13, and light from the subject passes through the respective surfaces S1 to S12 in order and is finally imaged on the image plane S13.
In embodiment 4, the value of the total effective focal length f of the image-taking lens group is 1.82mm, the value of the f-number Fno of the image-taking lens group is 2.23, the value of the on-axis distance TT L from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 4.00mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.30mm, and the value of the half Semi-FOV of the maximum angle of view is 52.5 °.
Table 7 shows a basic parameter table of the image pickup lens group of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 7
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 4.9729E-01 | -1.0940E-01 | -4.1530E+00 | 3.7769E+01 | -1.7808E+02 | 5.0145E+02 | -8.4508E+02 | 7.8304E+02 | -3.1028E+02 |
| S2 | 1.2378E+00 | -3.7389E+00 | 6.7557E+01 | -8.2964E+02 | 6.8269E+03 | -3.6243E+04 | 1.2008E+05 | -2.2734E+05 | 1.8411E+05 |
| S3 | -4.6264E-02 | -1.2453E+00 | 2.8939E+01 | -6.9681E+02 | 8.9375E+03 | -7.0725E+04 | 3.3344E+05 | -8.6063E+05 | 9.2781E+05 |
| S4 | -3.0137E-01 | -1.3840E+00 | 1.8229E+01 | -1.9931E+02 | 1.1401E+03 | -3.8165E+03 | 6.8078E+03 | -4.7668E+03 | -8.6714E+02 |
| S5 | -6.0350E-01 | 8.7372E-01 | -3.0059E+00 | 1.9756E+01 | -1.3527E+02 | 5.2868E+02 | -1.1753E+03 | 1.4670E+03 | -7.9492E+02 |
| S6 | -4.5155E-01 | -1.2588E-01 | 4.2594E+00 | -1.7565E+01 | 3.8259E+01 | -4.6787E+01 | 2.6368E+01 | 2.0093E+00 | -6.3449E+00 |
| S7 | 2.3361E-01 | -1.7840E+00 | 7.5541E+00 | -2.0411E+01 | 3.8832E+01 | -5.0948E+01 | 4.2782E+01 | -2.0110E+01 | 3.9229E+00 |
| S8 | 8.3815E-01 | -3.3994E+00 | 1.0504E+01 | -2.4335E+01 | 3.9837E+01 | -4.4082E+01 | 3.1291E+01 | -1.2775E+01 | 2.2683E+00 |
| S9 | -7.2192E-01 | 8.4192E-01 | -1.1637E+00 | 1.4666E+00 | -1.5313E+00 | 1.1727E+00 | -5.8850E-01 | 1.6919E-01 | -2.0784E-02 |
| S10 | -2.5230E-01 | 1.3609E-01 | -4.7607E-03 | -8.0135E-02 | 8.0713E-02 | -4.0982E-02 | 1.1877E-02 | -1.8710E-03 | 1.2497E-04 |
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the image-taking lens group of embodiment 4, which represents the convergent focus deviation of light rays of different wavelengths after passing through the image-taking lens group. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 4. Fig. 8C shows a distortion curve of the image capturing lens group of embodiment 4, which represents distortion magnitude values corresponding to different angles of view. Fig. 8D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the imaging lens group. As can be seen from fig. 8A to 8D, the imaging lens assembly according to embodiment 4 can achieve good imaging quality.
Example 5
A photographing lens group according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration diagram of a photographing lens group according to embodiment 5 of the present application.
As shown in fig. 9, the image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The image taking lens group has an image plane S13, and light from the subject passes through the respective surfaces S1 to S12 in order and is finally imaged on the image plane S13.
In embodiment 5, the value of the total effective focal length f of the image-taking lens group is 1.83mm, the value of the f-number Fno of the image-taking lens group is 2.23, the value of the on-axis distance TT L from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 4.00mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.30mm, and the value of the half Semi-FOV of the maximum angle of view is 52.4 °.
Table 9 shows a basic parameter table of the image pickup lens group of embodiment 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 shows high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 9
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 4.8443E-01 | -1.9270E-01 | -2.9494E+00 | 3.0868E+01 | -1.5775E+02 | 4.7491E+02 | -8.5057E+02 | 8.3464E+02 | -3.4847E+02 |
| S2 | 1.2504E+00 | -4.5804E+00 | 8.9826E+01 | -1.1658E+03 | 9.7790E+03 | -5.1975E+04 | 1.6987E+05 | -3.1340E+05 | 2.4725E+05 |
| S3 | -4.4443E-02 | -1.0535E+00 | 2.4508E+01 | -5.8904E+02 | 7.4024E+03 | -5.7480E+04 | 2.6739E+05 | -6.8422E+05 | 7.3244E+05 |
| S4 | -4.4485E-01 | 2.5885E-01 | -6.0500E+00 | 3.9089E+01 | -3.0292E+02 | 1.6587E+03 | -5.7939E+03 | 1.1171E+04 | -9.1805E+03 |
| S5 | -7.2866E-01 | 1.5626E+00 | -7.8659E+00 | 4.0818E+01 | -1.7584E+02 | 5.1599E+02 | -9.6105E+02 | 1.0394E+03 | -4.8915E+02 |
| S6 | -6.9456E-01 | 6.5956E-01 | 3.9347E-01 | -4.5040E+00 | 1.2686E+01 | -2.2428E+01 | 2.5524E+01 | -1.6972E+01 | 5.1744E+00 |
| S7 | 1.1551E-01 | -1.0754E+00 | 3.6832E+00 | -6.8362E+00 | 9.6434E+00 | -1.2272E+01 | 1.2316E+01 | -7.5546E+00 | 2.0105E+00 |
| S8 | 9.2576E-01 | -3.9673E+00 | 1.2409E+01 | -2.8372E+01 | 4.5119E+01 | -4.7983E+01 | 3.2463E+01 | -1.2545E+01 | 2.0909E+00 |
| S9 | -7.1375E-01 | 7.0416E-01 | -5.0108E-01 | -9.9898E-02 | 6.7191E-01 | -7.1706E-01 | 3.7596E-01 | -9.9251E-02 | 1.0495E-02 |
| S10 | -3.2221E-01 | 2.8279E-01 | -2.1131E-01 | 1.2112E-01 | -4.9879E-02 | 1.3646E-02 | -2.2472E-03 | 1.8642E-04 | -4.6049E-06 |
Fig. 10A shows an on-axis chromatic aberration curve of the image-taking lens group of embodiment 5, which represents the convergent focus deviation of light rays of different wavelengths after passing through the image-taking lens group. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 5. Fig. 10C shows a distortion curve of the image capturing lens group of embodiment 5, which represents distortion magnitude values corresponding to different angles of view. Fig. 10D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the imaging lens group. As can be seen from fig. 10A to 10D, the imaging lens assembly according to embodiment 5 can achieve good imaging quality.
Example 6
A photographing lens group according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic configuration diagram of a photographing lens group according to embodiment 6 of the present application.
As shown in fig. 11, the image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises: a first lens E1, a stop STO, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, and a filter E6.
The first lens element E1 has negative power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has positive power, and has a convex object-side surface S3 and a convex image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a convex object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The image taking lens group has an image plane S13, and light from the subject passes through the respective surfaces S1 to S12 in order and is finally imaged on the image plane S13.
In embodiment 6, the value of the total effective focal length f of the image-taking lens group is 1.76mm, the value of the f-number Fno of the image-taking lens group is 2.23, the value of the on-axis distance TT L from the object-side surface S1 of the first lens E1 to the imaging surface S13 is 4.00mm, the value of the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 is 2.30mm, and the value of the half Semi-FOV of the maximum angle of view is 53.3 °.
Table 11 shows a basic parameter table of the imaging lens group of embodiment 6, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 shows high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by formula (1) given in example 1 above.
TABLE 11
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 5.9768E-01 | -2.0394E-01 | -5.6722E+00 | 5.3715E+01 | -2.5708E+02 | 7.3555E+02 | -1.2654E+03 | 1.2071E+03 | -4.9706E+02 |
| S2 | 1.3421E+00 | -5.0685E+00 | 8.7213E+01 | -1.0473E+03 | 8.7471E+03 | -4.8226E+04 | 1.6846E+05 | -3.3827E+05 | 2.8944E+05 |
| S3 | 2.3379E-02 | -1.5995E+00 | 3.9456E+01 | -8.8499E+02 | 1.0609E+04 | -7.6207E+04 | 3.1315E+05 | -6.7026E+05 | 5.6622E+05 |
| S4 | 2.0650E-01 | -5.9882E+00 | 6.4855E+01 | -6.0279E+02 | 3.5454E+03 | -1.3313E+04 | 3.0635E+04 | -3.9282E+04 | 2.1271E+04 |
| S5 | 8.3235E-04 | -3.6460E+00 | 2.6932E+01 | -1.4355E+02 | 4.9780E+02 | -1.1354E+03 | 1.6310E+03 | -1.1845E+03 | 2.3301E+02 |
| S6 | 9.0835E-01 | -8.4279E+00 | 4.3329E+01 | -1.5180E+02 | 3.6016E+02 | -5.6145E+02 | 5.4408E+02 | -2.9105E+02 | 6.4396E+01 |
| S7 | 9.4967E-01 | -6.3478E+00 | 2.6268E+01 | -7.3715E+01 | 1.4199E+02 | -1.7892E+02 | 1.3563E+02 | -5.2589E+01 | 6.8041E+00 |
| S8 | 8.5297E-01 | -3.5632E+00 | 1.1329E+01 | -2.7160E+01 | 4.6054E+01 | -5.2808E+01 | 3.8862E+01 | -1.6470E+01 | 3.0403E+00 |
| S9 | -6.8725E-01 | 8.6825E-01 | -1.3690E+00 | 1.7633E+00 | -1.7371E+00 | 1.2528E+00 | -6.0687E-01 | 1.7159E-01 | -2.0921E-02 |
| S10 | -1.5684E-01 | -8.5467E-02 | 2.5224E-01 | -2.6512E-01 | 1.7068E-01 | -7.1033E-02 | 1.8538E-02 | -2.7548E-03 | 1.7810E-04 |
TABLE 12
Fig. 12A shows an on-axis chromatic aberration curve of the image-taking lens group of embodiment 6, which represents the convergent focus deviation of light rays of different wavelengths after passing through the image-taking lens group. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the image pickup lens group of embodiment 6. Fig. 12C shows a distortion curve of the image capturing lens group of embodiment 6, which represents distortion magnitude values corresponding to different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the imaging lens group. As can be seen from fig. 12A to 12D, the imaging lens assembly according to embodiment 6 can achieve good imaging quality.
In summary, examples 1 to 6 each satisfy the relationship shown in table 13.
| Conditional expression (A) example | 1 | 2 | 3 | 4 | 5 | 6 |
| tan4(Semi-FOV)×f(mm) | 5.38 | 5.26 | 5.06 | 5.25 | 5.21 | 5.71 |
| DT52/DT12 | 3.56 | 3.46 | 3.46 | 3.51 | 3.55 | 3.53 |
| TTL/ImgH×f2(mm) | 4.30 | 4.21 | 3.90 | 3.85 | 4.64 | 3.48 |
| (R9+R10)/(R9－R10) | 2.72 | 2.83 | 3.47 | 2.92 | 2.82 | 3.29 |
| f4/R9×f(mm) | 2.33 | 2.46 | 3.01 | 2.48 | 2.39 | 2.90 |
| f1/f3 | 1.21 | 1.35 | 1.35 | 1.61 | 1.08 | 1.63 |
| ∑AT/TD | 0.22 | 0.226 | 0.22 | 0.20 | 0.22 | 0.18 |
| (DT42+DT41)/(DT42－DT41) | 12.45 | 11.63 | 10.46 | 9.72 | 11.06 | 9.05 |
| (SAG22+SAG31)/(SAG22－SAG31) | 1.85 | 2.18 | 2.72 | 2.71 | 2.10 | 3.31 |
| f1/R4 | 5.05 | 5.67 | 4.59 | 4.95 | 3.67 | 5.70 |
| CT2/T23 | 2.67 | 2.15 | 2.27 | 2.76 | 2.11 | 3.19 |
| FOV(°) | 104.8 | 104.9 | 104.8 | 105.0 | 104.8 | 106.6 |
| CT4/CT1 | 3.79 | 3.97 | 3.92 | 4.14 | 4.05 | 4.25 |
Watch 13
The present application also provides an imaging Device, which is provided with an electron sensing element to form an image, wherein the electron sensing element may be a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described image-taking lens group.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of protection covered by the present application is not limited to the embodiments with a specific combination of the features described above, but also covers other embodiments with any combination of the features described above or their equivalents without departing from the scope of the present application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (24)
1. The image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:
the image side surface of the first lens is a concave surface;
a diaphragm;
the image side surface of the second lens is a convex surface;
a third lens having a negative optical power;
the image side surface of the fourth lens is a convex surface;
a fifth lens element with negative refractive power having a convex object-side surface and a concave image-side surface;
half of the Semi-FOV of the maximum field angle of the image pickup lens group and the total effective focal length f of the image pickup lens group satisfy 5.00mm < tan4(Semi-FOV)×f＜6.00mm；
The maximum effective radius DT12 of the image side surface of the first lens and the maximum effective radius DT52 of the image side surface of the fifth lens meet DT52/DT12 > 3.45.
2. The imaging lens group of claim 1, wherein a distance TT L on the optical axis from an object side surface of the first lens to an imaging surface of the imaging lens group, ImgH which is a half of a diagonal length of an effective pixel area on the imaging surface, and an effective focal length f2 of the second lens satisfy 3.00mm < TT L/ImgH × f2 < 5.00 mm.
3. The image capturing lens group of claim 1, wherein a radius of curvature R9 of the object side surface of the fifth lens element and a radius of curvature R10 of the image side surface of the fifth lens element satisfy 2.50 < (R9+ R10)/(R9-R10) < 4.00.
4. The image capturing lens group of claim 1, wherein an effective focal length f4 of the fourth lens, a radius of curvature R9 of an object side surface of the fifth lens, and a total effective focal length f of the image capturing lens group satisfy 2.00mm < f4/R9 × f < 3.50 mm.
5. The image capturing lens group of claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f3 of the third lens satisfy 1.00 < f1/f3 < 2.00.
6. The imaging lens group of claim 1, wherein a sum ∑ AT of a distance TD on the optical axis from an object side surface of the first lens element to an image side surface of the fifth lens element and a distance between any two adjacent lens elements of the first lens element to the fifth lens element satisfies ∑ AT/TD < 0.23.
7. The image capturing lens group of claim 1, wherein the maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT42 of the image side surface of the fourth lens satisfy 9.00 < (DT42+ DT41)/(DT42-DT41) < 13.00.
8. The image capturing lens group according to claim 1, wherein an on-axis distance SAG22 between the image side surface of the second lens and the focal point of the optical axis to the effective radius vertex of the image side surface of the second lens and an on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens satisfy 1.50 < (SAG22+ SAG31)/(SAG22-SAG31) < 3.50.
9. The imaging lens group of claim 1, wherein an effective focal length f1 of the first lens and a radius of curvature R4 of an image side surface of the second lens satisfy 3.00 < f1/R4 < 6.00.
10. The imaging lens group of claim 1, wherein a center thickness CT2 of 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 2.00 < CT2/T23 < 3.50.
11. The image capturing lens group according to any one of claims 1 to 10, wherein the maximum field angle FOV of the image capturing lens group satisfies FOV > 104.5 °.
12. The imaging lens group according to any one of claims 1 to 10, wherein a central thickness CT1 of the first lens on the optical axis and a central thickness CT4 of the fourth lens on the optical axis satisfy 3.50 < CT4/CT1 < 4.50.
13. The image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:
the image side surface of the first lens is a concave surface;
a diaphragm;
the image side surface of the second lens is a convex surface;
a third lens having a negative optical power;
the image side surface of the fourth lens is a convex surface;
a fifth lens element with negative refractive power having a convex object-side surface and a concave image-side surface;
half of the Semi-FOV of the maximum field angle of the image pickup lens group and the total effective focal length f of the image pickup lens group satisfy 5.00mm < tan4(Semi-FOV)×f＜6.00mm；
The maximum effective radius DT41 of the object side surface of the fourth lens and the maximum effective radius DT42 of the image side surface of the fourth lens meet 9.00 < (DT42+ DT41)/(DT42-DT41) < 13.00.
14. The imaging lens group of claim 13, wherein a distance TT L on the optical axis from an object side surface of the first lens to an imaging surface of the imaging lens group, ImgH which is a half of a diagonal length of an effective pixel area on the imaging surface, and an effective focal length f2 of the second lens satisfy 3.00mm < TT L/ImgH × f2 < 5.00 mm.
15. The image capturing lens group of claim 13, wherein a radius of curvature R9 of the object side surface of the fifth lens element and a radius of curvature R10 of the image side surface of the fifth lens element satisfy 2.50 < (R9+ R10)/(R9-R10) < 4.00.
16. The imaging lens group of claim 13, wherein the effective focal length f4 of the fourth lens, the radius of curvature R9 of the object side surface of the fifth lens, and the total effective focal length f of the imaging lens group satisfy 2.00mm < f4/R9 × f < 3.50 mm.
17. The image capturing lens group of claim 13, wherein an effective focal length f1 of the first lens and an effective focal length f3 of the third lens satisfy 1.00 < f1/f3 < 2.00.
18. The imaging lens group of claim 13, wherein the sum ∑ AT of the distance TD on the optical axis between the object-side surface of the first lens element and the image-side surface of the fifth lens element and the distance between any two adjacent lens elements of the first lens element and the fifth lens element satisfies ∑ AT/TD < 0.23.
19. The imaging lens group of claim 18, wherein the maximum effective radius DT12 of the image side surface of the first lens and the maximum effective radius DT52 of the image side surface of the fifth lens satisfy DT52/DT12 > 3.45.
20. The image capturing lens group of claim 13, wherein an on-axis distance SAG22 between the image side surface of the second lens and the focal point of the optical axis to the effective radius vertex of the image side surface of the second lens and an on-axis distance SAG31 between the intersection of the object side surface of the third lens and the optical axis to the effective radius vertex of the object side surface of the third lens satisfies 1.50 < (SAG22+ SAG31)/(SAG22-SAG31) < 3.50.
21. The image capturing lens group of claim 13, wherein an effective focal length f1 of the first lens and a radius of curvature R4 of an image side surface of the second lens satisfy 3.00 < f1/R4 < 6.00.
22. The imaging lens group of claim 13, wherein a center thickness CT2 of 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 2.00 < CT2/T23 < 3.50.
23. The image capturing lens group according to any one of claims 13 to 22, wherein the maximum field angle FOV of the image capturing lens group satisfies FOV > 104.5 °.
24. The imaging lens group according to any one of claims 13 to 22 wherein a central thickness CT1 of the first lens on the optical axis and a central thickness CT4 of the fourth lens on the optical axis satisfy 3.50 < CT4/CT1 < 4.50.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687665A (en) * | 2019-10-28 | 2020-01-14 | 浙江舜宇光学有限公司 | Image pickup lens assembly |
| CN111929841A (en) * | 2020-09-21 | 2020-11-13 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
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2019
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687665A (en) * | 2019-10-28 | 2020-01-14 | 浙江舜宇光学有限公司 | Image pickup lens assembly |
| CN111929841A (en) * | 2020-09-21 | 2020-11-13 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
| CN111929841B (en) * | 2020-09-21 | 2020-12-22 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
| WO2022057038A1 (en) * | 2020-09-21 | 2022-03-24 | 诚瑞光学(深圳)有限公司 | Photographing optical lens |
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