CN107203033B - Wide-angle lens - Google Patents
Wide-angle lens Download PDFInfo
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- CN107203033B CN107203033B CN201610168127.3A CN201610168127A CN107203033B CN 107203033 B CN107203033 B CN 107203033B CN 201610168127 A CN201610168127 A CN 201610168127A CN 107203033 B CN107203033 B CN 107203033B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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Abstract
The invention disclosesA wide-angle lens includes, in order from an object side to an image side: a first lens having a negative optical power; a second lens having an optical power; a third lens having a positive optical power; the fourth lens is provided with negative focal power, and the object side surface of the fourth lens and the image side surface of the fourth lens are both aspheric surfaces; a fifth lens having a positive optical power, an object side surface of the fifth lens being concave at a paraxial region; and the object side surface of the sixth lens and the image side surface of the sixth lens are both aspheric surfaces. The wide-angle lens satisfies: 0.6mm ‑1 ≦tan(HFOV)/TTL<1.0mm ‑1 (ii) a CT5/CT6 is ≧ 2.2, and TTL is the on-axis distance from the object side surface of the first lens to the imaging surface; the HFOV is half of the maximum field angle of the wide-angle lens; CT5 is the center thickness of the fifth lens and CT6 is the center thickness of the sixth lens. The wide-angle lens has the characteristics of high pixel and ultra wide angle, can realize miniaturization, is convenient to apply to portable electronic products, and meets the requirements of consumers.
Description
Technical Field
The invention relates to the field of image pickup, in particular to a wide-angle lens.
Background
With the development of science and technology, portable electronic products are gradually emerging, and especially, portable electronic products with a camera shooting function are more popular. The photosensitive elements of a general optical system are not limited to a photosensitive coupling element (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). As semiconductor processing technology advances, the pixel size of the photosensitive element shrinks, and the optical system tends to have higher pixels and higher image quality.
In order to meet this trend, imaging lenses mounted on imaging devices such as mobile phones, digital cameras, automobiles, and monitors are also required to have higher pixels, smaller sizes, and wider angles. In order to realize the super-wide angle, the number of lens pieces is easy to increase, which is not beneficial to the miniaturization and the light weight of the lens; meanwhile, the reduction of each aberration is limited, which is not beneficial to improving the imaging quality.
Disclosure of Invention
The embodiment of the invention aims to solve at least one technical problem in the prior art. Therefore, embodiments of the present invention need to provide a wide-angle lens.
A wide-angle lens includes, in order from an object side to an image side:
a first lens having a negative optical power;
a second lens having an optical power;
a third lens having a positive optical power;
the fourth lens is provided with negative focal power, and the object side surface of the fourth lens and the image side surface of the fourth lens are both aspheric surfaces;
a fifth lens having a positive optical power, an object side surface of the fifth lens being concave at a paraxial region;
the sixth lens with negative focal power, the object side surface of the sixth lens and the image side surface of the sixth lens are both aspheric surfaces;
the wide-angle lens satisfies the relation: 0.6mm -1 ≤tan(HFOV)/TTL＜1.0mm -1 ；CT5/CT6≥2.2；
Wherein, TTL is the axial distance from the object side surface of the first lens to the imaging surface; the HFOV is half of the maximum field angle of the wide-angle lens; CT5 is the center thickness of the fifth lens and CT6 is the center thickness of the sixth lens.
The wide-angle lens with the configuration has the characteristics of high pixel and ultra wide angle, and the length of the wide-angle lens can be effectively shortened while the imaging quality of the wide-angle lens is improved and the field angle is enlarged, so that the wide-angle lens can be miniaturized, is convenient to apply to portable electronic products, and meets the requirements of consumers.
In one embodiment, the wide-angle lens satisfies the following relationship: -2.0 < f1/f < -1.0; V1-V2 is more than or equal to 30;
wherein f1 is the effective focal length of the first lens, and f is the effective focal length of the wide-angle lens; v1 is the Abbe number of the first lens and V2 is the Abbe number of the second lens.
In one embodiment, the wide-angle lens satisfies the following relationship: 0.4 < SAG12/DT12 < 0.8;
wherein SAG12 is the rise of the image side of the first lens, and DT12 is the maximum effective radius of the image side of the first lens.
In one embodiment, the wide-angle lens satisfies the following relationship: f3/f is more than 0.8 and less than 1.5; f5/f is more than 0.5 and less than 1.0;
wherein f3 is the effective focal length of the third lens element, f5 is the effective focal length of the fifth lens element, and f is the effective focal length of the wide-angle lens.
In one embodiment, the image side surface of the fourth lens is a concave surface, and the wide-angle lens satisfies the following relation: -5.0< f4/f < -1.5; wherein f4 is the effective focal length of the fourth lens element, and f is the effective focal length of the wide-angle lens.
In one embodiment, the wide-angle lens satisfies the following relationship: -1.5 < f6/f < 0;
where f6 is the effective focal length of the sixth lens element, and f is the effective focal length of the wide-angle lens.
In one embodiment, the wide-angle lens satisfies the following relationship: V5-V6 is more than 25 and less than 45;
wherein V5 is the Abbe number of the first lens and V6 is the Abbe number of the second lens.
In one embodiment, the wide-angle lens satisfies the following relationship: 0.6 < | SAG52|/CT5 < 0.9;
wherein SAG52 is the rise of the image side of the fifth lens, and CT5 is the center thickness of the fifth lens.
In one embodiment, the image-side surface of the third lens element is convex, and the image-side surface of the fifth lens element is convex.
In one embodiment, the material of the sixth lens element is plastic, and the object-side surface of the sixth lens element is convex at the paraxial region and the image-side surface of the sixth lens element is concave at the paraxial region and turns to be convex as going away from the optical axis.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.
Drawings
The above and/or additional aspects and advantages of embodiments of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a wide-angle lens of embodiment 1;
fig. 2 is an on-axis aberration diagram (mm) of the wide-angle lens of embodiment 1; fig. 3 is an astigmatic view (mm) of the wide-angle lens of embodiment 1; fig. 4 is a distortion diagram (%) of the wide-angle lens of embodiment 1; fig. 5 is a chromatic aberration of magnification (um) of the wide-angle lens of embodiment 1;
fig. 6 is a schematic structural view of the wide-angle lens of embodiment 2;
fig. 7 is an on-axis aberration diagram (mm) of the wide-angle lens of embodiment 2; fig. 8 is an astigmatic view (mm) of the wide-angle lens of embodiment 2; fig. 9 is a distortion diagram (%) of the wide-angle lens of embodiment 2; fig. 10 is a chromatic aberration of magnification (um) of the wide-angle lens of embodiment 2;
fig. 11 is a schematic structural view of the wide-angle lens of embodiment 3;
fig. 12 is an on-axis aberration diagram (mm) of the wide-angle lens of embodiment 3; fig. 13 is an astigmatism (mm) diagram of the wide-angle lens of embodiment 3; fig. 14 is a distortion diagram (%) of the wide-angle lens of embodiment 3; fig. 15 is a chromatic aberration of magnification (um) of the wide-angle lens of embodiment 3;
fig. 16 is a schematic structural view of a wide-angle lens of embodiment 4;
fig. 17 is an on-axis aberration diagram (mm) of the wide-angle lens of embodiment 4; fig. 18 is an astigmatic view (mm) of the wide-angle lens of embodiment 4; fig. 19 is a distortion diagram (%) of the wide-angle lens of embodiment 4; fig. 20 is a chromatic aberration of magnification (um) of the wide-angle lens of embodiment 4;
fig. 21 is a schematic structural view of a wide-angle lens of embodiment 5;
fig. 22 is an on-axis aberration diagram (mm) of the wide-angle lens of embodiment 5; fig. 23 is an astigmatic view (mm) of the wide-angle lens of embodiment 5; fig. 24 is a distortion diagram (%) of the wide-angle lens of embodiment 5; fig. 25 is a chromatic aberration of magnification (um) of the wide-angle lens of embodiment 5;
fig. 26 is a schematic structural view of a wide-angle lens of embodiment 6;
fig. 27 is an on-axis aberration diagram (mm) of the wide-angle lens of embodiment 6; fig. 28 is an astigmatic view (mm) of the wide-angle lens of embodiment 6; fig. 29 is a distortion diagram (%) of the wide-angle lens of embodiment 6; fig. 30 is a chromatic aberration of magnification (um) of the wide-angle lens of embodiment 6.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and settings of a specific example are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1, the wide-angle lens according to the preferred embodiment of the present invention, in order from an object side to an image side, includes:
a first lens E1 having a negative optical power;
a second lens E2 having an optical power;
a third lens E3 having positive optical power;
a fourth lens element E4 having a negative refractive power, an object-side surface S7 of the fourth lens element E4 and an image-side surface S8 of the fourth lens element E4 both being aspheric;
a fifth lens E5 having positive optical power, the object side S9 of the fifth lens E5 being concave at the paraxial region;
a sixth lens element E6 having a negative refractive power, an object-side surface S11 of the sixth lens element E6 and an image-side surface S12 of the sixth lens element E6 being aspheric;
the wide-angle lens satisfies the relation: 0.6mm -1 ≤tan(HFOV)/TTL＜1.0mm -1 ；CT5/CT6≥2.2；
Wherein, TTL is an on-axis distance from the object-side surface S1 of the first lens element E1 to the image plane S15; the HFOV is half of the maximum field angle of the wide-angle lens; CT5 is the center thickness of the fifth lens E5, and CT6 is the center thickness of the sixth lens E6.
The wide-angle lens with the configuration has the characteristics of high pixel and ultra wide angle, and the length of the wide-angle lens can be effectively shortened while the imaging quality of the wide-angle lens is improved and the field angle is enlarged, so that the wide-angle lens can be miniaturized, is convenient to apply to portable electronic products, and meets the requirements of consumers.
Preferably, the wide-angle lens satisfies the following relation: -2.0 < f1/f < -1.0; V1-V2 is more than or equal to 30;
wherein f1 is the effective focal length of the first lens E1, and f is the effective focal length of the wide-angle lens; v1 is the Abbe number of the first lens E1, and V2 is the Abbe number of the second lens E2.
The wide-angle lens meeting the requirements of the above formula is beneficial to expanding the field angle of the wide-angle lens and improving the imaging definition of the wide-angle lens.
Preferably, the wide-angle lens satisfies the following relation: 0.4 < SAG12/DT12 < 0.8;
SAG12 is the rise of the image side surface S2 of the first lens E1, and DT12 is the maximum effective radius of the image side surface S2 of the first lens E1.
The wide-angle lens meeting the requirements of the above formula is beneficial to improving the edge brightness of the lens and reducing the possibility of generating a dark angle.
Preferably, the wide-angle lens satisfies the following relation: f3/f is more than 0.8 and less than 1.5; f5/f is more than 0.5 and less than 1.0;
wherein f3 is the effective focal length of the third lens element E3, f5 is the effective focal length of the fifth lens element E5, and f is the effective focal length of the wide-angle lens.
The wide-angle lens meeting the requirements of the above formula is beneficial to reducing system aberration, especially effectively corrects field curvature of the wide-angle lens, and further improves imaging quality of the wide-angle lens.
Preferably, the image-side surface S8 of the fourth lens element E4 is concave, and the wide-angle lens satisfies the following relationship: -5.0< f4/f < -1.5;
wherein f4 is the effective focal length of the fourth lens element E4, and f is the effective focal length of the wide-angle lens.
The wide-angle lens meeting the requirements of the above formula is beneficial to shortening the length of the wide-angle lens, realizes miniaturization, and further can ensure that the wide-angle lens is more suitable for portable electronic products.
Preferably, the wide-angle lens satisfies the following relation: -1.5 < f6/f < 0;
wherein f6 is the effective focal length of the sixth lens element E6, and f is the effective focal length of the wide-angle lens.
The wide-angle lens meeting the requirements of the above formula further enlarges the field angle of the wide-angle lens and can better correct distortion, thereby improving the imaging quality of the wide-angle lens.
Preferably, the wide-angle lens satisfies the following relation: 25 < V5-V6 < 45;
wherein V5 is the Abbe number of the first lens E1, and V6 is the Abbe number of the second lens E2.
The wide-angle lens meeting the requirements of the above formula effectively corrects the chromatic aberration of the wide-angle lens, and improves the imaging definition of the wide-angle lens, thereby improving the imaging quality of the wide-angle lens.
Preferably, the wide-angle lens satisfies the following relation: 0.6 < | SAG52|/CT5 < 0.9;
wherein SAG52 is the rise of the image-side surface S10 of the fifth lens E5, and CT5 is the center thickness of the fifth lens E5.
The wide-angle lens meeting the requirements of the above formula can effectively reduce the volume of the wide-angle lens, can reduce the tolerance sensitivity of the wide-angle lens, enables the lens to be easily assembled, and further reduces the cost of the wide-angle lens.
Preferably, the image-side surface S6 of the third lens element E3 is convex, and the image-side surface S10 of the fifth lens element E5 is convex.
The wide-angle lens meeting the requirements is beneficial to improving the imaging quality of the wide-angle lens.
Preferably, the material of the sixth lens element is plastic, the object-side surface S11 of the sixth lens element E6 is convex at the paraxial region, and the image-side surface S12 of the sixth lens element E6 is concave at the paraxial region and turns to be convex as going away from the optical axis.
The wide-angle lens meeting the requirements is beneficial to reducing the incident angle of the chief ray on the imaging surface S15 and improving the matching performance of the photosensitive element. Meanwhile, the plastic lens is more suitable for a miniaturized wide-angle lens and can improve the imaging quality of the wide-angle lens.
During imaging, the light rays pass through the six lenses and then pass through a filter E7 having an object-side surface S13 and an image-side surface S14, and then are imaged on an image plane S15.
In some embodiments, the first lens E1, the second lens E2, the third lens E3, the fourth lens E4, the fifth lens E5, and the sixth lens E6 are aspheric lenses.
The surface shape of the aspheric surface is determined by the following formula:
wherein h is the height from any point on the aspheric surface to the optical axis, c is the vertex curvature, k is the conic constant, and Ai is the correction coefficient of the i-th order of the aspheric surface.
Example 1
Referring to fig. 1 to 5, in example 1, the wide-angle lens satisfies the conditions of tables 1 to 3 below:
TABLE 1
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | All-round | -- | -- |
| S1 | Aspherical surface | -58.5742 | 0.2500 | 1.544/56.11 | -53.3621 |
| S2 | Aspherical surface | 1.1122 | 0.5360 | -- | -0.1579 |
| S3 | Aspherical surface | 1.5812 | 0.2903 | 1.640/23.53 | -5.7910 |
| S4 | Aspherical surface | 2.4984 | 0.1352 | -- | -91.0188 |
| STO | Spherical surface | All-round | 0.0262 | -- | -- |
| S5 | Aspherical surface | 2.8131 | 0.4877 | 1.544/56.11 | -17.1996 |
| S6 | Aspherical surface | -0.9661 | 0.0300 | -- | 1.3915 |
| S7 | Aspherical surface | 16.5653 | 0.2400 | 1.640/23.53 | -91.2833 |
| S8 | Aspherical surface | 1.5930 | 0.1884 | -- | -10.1512 |
| S9 | Aspherical surface | -36.0900 | 0.8948 | 1.544/56.11 | -79.1939 |
| S10 | Aspherical surface | -0.6896 | 0.0716 | -- | -1.4345 |
| S11 | Aspherical surface | 1.8268 | 0.3218 | 1.640/23.53 | -77.4651 |
| S12 | Aspherical surface | 0.6201 | 0.7855 | -- | -6.2845 |
| S13 | Spherical surface | All-round | 0.1100 | 1.517/64.17 | -- |
| S14 | Spherical surface | All-round | 0.1125 | -- | -- |
| S15 | Spherical surface | All-round | -- | -- | -- |
TABLE 2
TABLE 3
| f1(mm) | -1.99 | f(mm) | 1.46 |
| f2(mm) | 5.93 | TTL(mm) | 4.48 |
| f3(mm) | 1.38 | HFOV(deg) | 72.66 |
| f4(mm) | -2.75 | ||
| f5(mm) | 1.28 | ||
| f6(mm) | -1.62 |
Example 2
Referring to fig. 6 to 10, in example 2, the wide-angle lens satisfies the conditions of tables 4 to 6 below:
TABLE 4
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | Go to nothing | All-round | -- | -- |
| S1 | Aspherical surface | 4.1053 | 0.2500 | 1.544/56.11 | -53.3621 |
| S2 | Aspherical surface | 0.9279 | 0.6562 | -- | -0.4428 |
| S3 | Aspherical surface | 1.6419 | 0.2831 | 1.640/23.53 | -7.4925 |
| S4 | Aspherical surface | 2.6433 | 0.1218 | -- | -91.0188 |
| STO | Spherical surface | All-round | -0.0064 | -- | -- |
| S5 | Aspherical surface | 3.0419 | 0.4995 | 1.544/56.11 | -17.2620 |
| S6 | Aspherical surface | -0.8921 | 0.0300 | -- | 1.0773 |
| S7 | Aspherical surface | 9.4686 | 0.2400 | 1.640/23.53 | -91.2833 |
| S8 | Aspherical surface | 1.5590 | 0.1981 | -- | -9.8252 |
| S9 | Aspherical surface | -2.2019 | 0.8238 | 1.544/56.11 | -78.4579 |
| S10 | Aspherical surface | -0.5525 | 0.0384 | -- | -1.4443 |
| S11 | Aspherical surface | 1.8453 | 0.3207 | 1.640/23.53 | -77.6088 |
| S12 | Aspherical surface | 0.5736 | 0.7940 | -- | -6.6629 |
| S13 | Spherical surface | Go to nothing | 0.1100 | 1.517/64.17 | -- |
| S14 | Spherical surface | All-round | 0.1210 | -- | -- |
| S15 | Spherical surface | All-round | -- | -- | -- |
TABLE 5
TABLE 6
| f1(mm) | -2.26 | f(mm) | 1.46 |
| f2(mm) | 6.04 | TTL(mm) | 4.48 |
| f3(mm) | 1.32 | HFOV(deg) | 73.65 |
| f4(mm) | -2.92 | ||
| f5(mm) | 1.15 | ||
| f6(mm) | -1.43 |
Example 3
Referring to fig. 11 to 15, in example 3, the wide-angle lens satisfies the following conditions of tables 7 to 9:
TABLE 7
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | All-round | -- | -- |
| S1 | Aspherical surface | -33.1213 | 0.2500 | 1.544/56.11 | -53.3621 |
| S2 | Aspherical surface | 1.2436 | 0.5226 | -- | -0.1986 |
| S3 | Aspherical surface | 1.8338 | 0.2512 | 1.640/23.53 | -15.0683 |
| S4 | Aspherical surface | 1.7181 | 0.1159 | -- | -91.0188 |
| STO | Spherical surface | Go to nothing | 0.0043 | -- | -- |
| S5 | Aspherical surface | 2.0106 | 0.5338 | 1.544/56.11 | -17.1996 |
| S6 | Aspherical surface | -0.9664 | 0.0659 | -- | 1.3892 |
| S7 | Aspherical surface | 7.2879 | 0.2400 | 1.640/23.53 | -91.2833 |
| S8 | Aspherical surface | 1.5295 | 0.2069 | -- | -11.4606 |
| S9 | Aspherical surface | -91.8418 | 0.8922 | 1.544/56.11 | -79.1939 |
| S10 | Aspherical surface | -0.6529 | 0.0300 | -- | -1.4594 |
| S11 | Aspherical surface | 1.7079 | 0.3606 | 1.640/23.53 | -76.9769 |
| S12 | Aspherical surface | 0.5584 | 0.7852 | -- | -5.6773 |
| S13 | Spherical surface | All-round | 0.1100 | 1.517/64.17 | -- |
| S14 | Spherical surface | All-round | 0.1122 | -- | -- |
| S15 | Spherical surface | All-round | -- | -- | -- |
TABLE 8
TABLE 9
| f1(mm) | -2.19 | f(mm) | 1.46 |
| f2(mm) | -285.99 | TTL(mm) | 4.48 |
| f3(mm) | 1.28 | HFOV(deg) | 74.76 |
| f4(mm) | -3.05 | ||
| f5(mm) | 1.20 | ||
| f6(mm) | -1.46 |
Example 4
Referring to fig. 16 to 20, in embodiment 4, the wide-angle lens satisfies the conditions in tables 10 to 12 below:
watch 10
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | All-round | -- | -- |
| S1 | Aspherical surface | -5.0378 | 0.2431 | 1.535/55.78 | 7.7286 |
| S2 | Aspherical surface | 1.8992 | 0.4072 | -- | -13.3382 |
| S3 | Aspherical surface | -51.7398 | 0.2543 | 1.640/23.53 | 50.0000 |
| S4 | Aspherical surface | -15.8881 | 0.0400 | -- | -39.4498 |
| STO | Spherical surface | All-round | -0.0063 | -- | -- |
| S5 | Aspherical surface | 1.9888 | 0.6179 | 1.535/55.78 | -3.2979 |
| S6 | Aspherical surface | -1.5234 | 0.0806 | -- | 4.4980 |
| S7 | Aspherical surface | 3.9081 | 0.2400 | 1.640/23.53 | -15.7292 |
| S8 | Aspherical surface | 1.9299 | 0.1207 | -- | -9.6032 |
| S9 | Aspherical surface | -6.6823 | 1.0855 | 1.535/55.78 | 37.9409 |
| S10 | Aspherical surface | -0.5170 | 0.0300 | -- | -2.5172 |
| S11 | Aspherical surface | 1.7956 | 0.3400 | 1.640/23.53 | -99.9000 |
| S12 | Aspherical surface | 0.4816 | 0.4677 | -- | -5.4754 |
| S13 | Spherical surface | All-round | 0.1100 | 1.517/64.17 | -- |
| S14 | Spherical surface | All-round | 0.4435 | -- | -- |
| S15 | Spherical surface | Go to nothing | -- | -- | -- |
TABLE 11
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 9.1127E-01 | -1.6534E+00 | 2.5832E+00 | -2.7975E+00 | 1.8940E+00 | -7.5238E-01 | 1.3657E-01 |
| S2 | 1.4684E+00 | 1.5132E+00 | -2.8927E+01 | 1.8315E+02 | -5.9069E+02 | 1.0396E+03 | -7.9070E+02 |
| S3 | 5.2003E-02 | -3.6778E-01 | 6.2507E-01 | -8.9326E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 4.0531E-02 | -8.5498E-01 | 3.1472E+00 | -3.8698E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | 8.2875E-02 | -7.2692E-01 | -2.1577E+00 | 2.3234E+01 | -8.4548E+01 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.1132E+00 | 3.0060E+00 | -4.2222E+00 | -1.1856E+00 | 4.8633E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | -1.6130E+00 | 2.0844E+00 | -3.7995E+00 | 1.1284E+01 | -3.9589E+01 | 4.4247E+01 | -9.9047E+00 |
| S8 | -3.4622E-01 | 1.2922E-01 | 1.6307E+00 | -4.5312E+00 | 5.6221E+00 | -3.4372E+00 | 8.1795E-01 |
| S9 | 4.3106E-02 | 6.2171E-01 | -2.7787E+00 | 5.7723E+00 | -6.4126E+00 | 3.7869E+00 | -9.2791E-01 |
| S10 | 1.8070E-01 | -1.2033E+00 | 2.5314E+00 | -3.4910E+00 | 3.0481E+00 | -1.5806E+00 | 3.8419E-01 |
| S11 | 2.9707E-01 | -1.0327E+00 | 1.4999E+00 | -1.5224E+00 | 9.4572E-01 | -3.0993E-01 | 4.0890E-02 |
| S12 | 2.8310E-02 | -1.7142E-01 | 1.5325E-01 | -7.7921E-02 | 2.3441E-02 | -3.8342E-03 | 2.5883E-04 |
TABLE 12
| f1(mm) | -2.54 | f(mm) | 1.48 |
| f2(mm) | 35.47 | TTL(mm) | 4.47 |
| f3(mm) | 1.71 | HFOV(deg) | 70.86 |
| f4(mm) | -6.21 | ||
| f5(mm) | 0.98 | ||
| f6(mm) | -1.14 |
Example 5
Referring to FIGS. 21 to 25, in example 5, the wide-angle lens satisfies the conditions in the following tables 13 to 15:
watch 13
TABLE 14
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 6.9225E-01 | -1.1947E+00 | 1.7017E+00 | -1.6985E+00 | 1.0855E+00 | -3.9545E-01 | 6.3151E-02 |
| S2 | 2.2485E+00 | -7.2424E+00 | 2.7326E+01 | -7.5286E+01 | 1.4419E+02 | -1.6295E+02 | 7.6319E+01 |
| S3 | -1.8243E-01 | -1.6192E-01 | -1.2487E+00 | 2.4266E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 1.7510E-01 | -1.0202E+00 | 2.3761E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | 3.5915E-01 | -5.4712E-01 | -7.0101E+00 | 4.3197E+01 | -1.2346E+02 | 0.0000E+00 | 0.0000E+00 |
| S6 | -9.1170E-01 | 6.1036E+00 | -2.3388E+01 | 4.4912E+01 | -3.5056E+01 | 0.0000E+00 | 0.0000E+00 |
| S7 | -1.7272E+00 | 6.6748E+00 | -3.3400E+01 | 1.2005E+02 | -3.2110E+02 | 5.0198E+02 | -3.3959E+02 |
| S8 | -4.4630E-01 | 9.3890E-01 | -1.3354E+00 | 7.7203E-01 | 3.8837E-01 | -5.5583E-01 | 3.7295E-02 |
| S9 | 1.6901E-01 | -3.2793E-01 | 6.2394E-01 | -1.3220E-01 | -1.4049E+00 | 2.0692E+00 | -9.4085E-01 |
| S10 | 2.7020E-01 | -1.0638E+00 | 1.3386E+00 | -7.4898E-01 | -1.6886E-01 | 3.8586E-01 | -1.0200E-01 |
| S11 | 1.0793E-01 | -6.4566E-01 | 8.1566E-01 | -7.0404E-01 | 3.7423E-01 | -1.0490E-01 | 1.1912E-02 |
| S12 | -7.4430E-02 | -4.4354E-02 | 5.7895E-02 | -3.1755E-02 | 9.1641E-03 | -1.3352E-03 | 7.4010E-05 |
| f1(mm) | -2.34 | f(mm) | 1.47 |
| f2(mm) | 6.77 | TTL(mm) | 4.47 |
| f3(mm) | 1.92 | HFOV(deg) | 70.05 |
| f4(mm) | -4.87 | ||
| f5(mm) | 1.10 | ||
| f6(mm) | -1.40 |
Example 6
Referring to FIGS. 26 to 30, in example 6, the wide-angle lens satisfies the conditions of the following tables 16 to 18:
TABLE 16
TABLE 17
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 7.2834E-01 | -1.1758E+00 | 1.6033E+00 | -1.5042E+00 | 8.3886E-01 | -2.4992E-01 | 3.0502E-02 |
| S2 | 1.2552E+00 | 3.9909E-02 | -8.5766E+00 | 4.8635E+01 | -1.2032E+02 | 1.6013E+02 | -1.0010E+02 |
| S3 | -3.7035E-02 | -1.9708E-01 | 1.3962E-02 | 5.8841E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -2.3525E-03 | -5.0589E-01 | 1.7127E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | 1.3195E-01 | -7.9747E-01 | 2.4924E+00 | -7.5405E+00 | 4.1788E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -7.5635E-01 | 2.5196E+00 | -6.8255E+00 | 1.0901E+01 | -7.7038E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | -1.2388E+00 | 2.0997E+00 | -6.4182E+00 | 1.6010E+01 | -3.6254E+01 | 4.9880E+01 | -2.8515E+01 |
| S8 | -2.9204E-01 | 2.2173E-01 | 6.5147E-01 | -2.2205E+00 | 2.9991E+00 | -1.9381E+00 | 4.7472E-01 |
| S9 | 8.7130E-02 | -9.9576E-02 | 2.3255E-01 | -1.0803E-01 | -3.0756E-01 | 4.5964E-01 | -1.8430E-01 |
| S10 | 8.4236E-02 | -8.1152E-01 | 1.4743E+00 | -1.6711E+00 | 1.1681E+00 | -4.8232E-01 | 1.0446E-01 |
| S11 | -3.1929E-03 | -5.2021E-01 | 8.1554E-01 | -8.0151E-01 | 4.7709E-01 | -1.5287E-01 | 2.0270E-02 |
| S12 | -1.5007E-01 | 6.2420E-02 | -1.8763E-02 | 1.6955E-03 | 7.2408E-04 | -2.4475E-04 | 2.1688E-05 |
| f1(mm) | -2.77 | f(mm) | 1.62 |
| f2(mm) | 14.08 | TTL(mm) | 4.47 |
| f3(mm) | 1.95 | HFOV(deg) | 71.75 |
| f4(mm) | -6.71 | ||
| f5(mm) | 1.12 | ||
| f6(mm) | -1.33 |
In examples 1 to 6, each conditional expression satisfies the conditions of the following table:
| conditional formula (II) | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| tan(HFOV)/TTL | 0.76 | 0.71 | 0.82 | 0.64 | 0.62 | 0.68 |
| CT5/CT6 | 2.78 | 2.57 | 2.47 | 3.19 | 3.03 | 3.18 |
| f1/f | -1.36 | -1.55 | -1.50 | -1.72 | -1.59 | -1.71 |
| f3/f | 0.94 | 0.91 | 0.87 | 1.16 | 1.31 | 1.21 |
| f4/f | -1.88 | -2.00 | -2.09 | -4.20 | -3.31 | -4.15 |
| f5/f | 0.87 | 0.79 | 0.82 | 0.66 | 0.75 | 0.69 |
| f6/f | -1.11 | -0.98 | -1.00 | -0.77 | -0.95 | -0.82 |
| V1-V2 | 32.58 | 32.58 | 32.58 | 32.25 | 34.26 | 32.25 |
| V5-V6 | 32.58 | 32.58 | 32.58 | 32.25 | 32.25 | 32.25 |
| SAG12/DT12 | 0.63 | 0.70 | 0.57 | 0.53 | 0.56 | 0.46 |
| |SAG52|/CT5 | 0.72 | 0.78 | 0.73 | 0.72 | 0.72 | 0.74 |
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The wide-angle lens is characterized by comprising the following six lenses with focal power from an object side to an image side in sequence:
a first lens having a negative optical power;
a second lens having an optical power;
a third lens having positive optical power;
the fourth lens is provided with negative focal power, and the object side surface of the fourth lens and the image side surface of the fourth lens are both aspheric surfaces;
a fifth lens having a negative optical power, an object side surface of the fifth lens being concave at a paraxial region;
the sixth lens with negative focal power, the object side surface of the sixth lens and the image side surface of the sixth lens are both aspheric surfaces;
the wide-angle lens satisfies the relation: 0.6mm -1 ≦tan(HFOV)/TTL<1.0mm -1 ；CT5/CT6≧2.2；
Wherein, TTL is the axial distance from the object side surface of the first lens to the imaging surface; the HFOV is half of the maximum field angle of the wide-angle lens; CT5 is the center thickness of the fifth lens, CT6 is the center thickness of the sixth lens,
the first lens, the second lens, the third lens and the fifth lens have at least one aspheric surface on an object side surface and an image side surface thereof.
2. The wide-angle lens of claim 1, wherein the wide-angle lens satisfies the following relationship:
-2.0<f1/f<-1.0；V1-V2≧30；
wherein f1 is the effective focal length of the first lens, and f is the effective focal length of the wide-angle lens; v1 is the Abbe number of the first lens and V2 is the Abbe number of the second lens.
3. The wide-angle lens of claim 1, wherein the wide-angle lens satisfies the following relationship:
0.4<SAG12/DT12<0.8；
wherein SAG12 is the rise of the image side of the first lens, and DT12 is the maximum effective radius of the image side of the first lens.
4. The wide-angle lens of claim 1, wherein the wide-angle lens satisfies the following relationship:
0.8<f3/f<1.5；0.5<f5/f<1.0；
wherein f3 is the effective focal length of the third lens element, f5 is the effective focal length of the fifth lens element, and f is the effective focal length of the wide-angle lens.
5. The wide-angle lens of claim 1, wherein the image-side surface of the fourth lens element is concave, and the wide-angle lens satisfies the following relationship: -5.0< f4/f < -1.5;
wherein f4 is the effective focal length of the fourth lens element, and f is the effective focal length of the wide-angle lens.
6. The wide-angle lens of claim 1, wherein the wide-angle lens satisfies the following relationship:
-1.5<f6/f<0；
where f6 is the effective focal length of the sixth lens element, and f is the effective focal length of the wide-angle lens.
7. The wide-angle lens of claim 1, wherein the wide-angle lens satisfies the following relationship:
25<V5-V6<45；
wherein V5 is the Abbe number of the first lens and V6 is the Abbe number of the second lens.
8. The wide-angle lens of claim 1, wherein the wide-angle lens satisfies the following relationship:
0.6<|SAG52|/CT5<0.9；
wherein SAG52 is the rise of the image side of the fifth lens, and CT5 is the center thickness of the fifth lens.
9. The wide-angle lens of claim 1, wherein the image-side surface of the third lens element is convex and the image-side surface of the fifth lens element is convex.
10. The wide-angle lens of claim 1, wherein the material of the sixth lens element is plastic, and an object-side surface of the sixth lens element is convex at a paraxial region and an image-side surface of the sixth lens element is concave at the paraxial region and turns to convex with distance from the optical axis.
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| TWI650588B (en) * | 2018-02-02 | 2019-02-11 | 大立光電股份有限公司 | Image capturing optical lens group, image capturing device and electronic device |
| CN108469669B (en) | 2018-05-25 | 2023-06-30 | 浙江舜宇光学有限公司 | Image pickup lens |
| CN109541785A (en) * | 2019-01-22 | 2019-03-29 | 浙江舜宇光学有限公司 | Optical lens group |
| TWI698673B (en) | 2019-04-10 | 2020-07-11 | 大立光電股份有限公司 | Optical lens assembly, imaging apparatus and electronic device |
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