CN111025563A - Image pickup optical lens - Google Patents
Image pickup optical lens Download PDFInfo
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- CN111025563A CN111025563A CN201911363680.2A CN201911363680A CN111025563A CN 111025563 A CN111025563 A CN 111025563A CN 201911363680 A CN201911363680 A CN 201911363680A CN 111025563 A CN111025563 A CN 111025563A
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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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- 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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Abstract
The invention relates to the field of optical lenses, and discloses an image pickup optical lens, which sequentially comprises the following components from an object side to an image side: a first lens element with negative refractive power, a second lens element with positive refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element, a sixth lens element, and a seventh lens element; the focal length of the image pickup optical lens is f, the focal length of the second lens is f2, the focal length of the sixth lens is f6, the on-axis thickness of the first lens is d1, the on-axis thickness of the third lens is d5, the maximum field angle of the image pickup optical lens is FOV, and the following relational expressions are satisfied: FOV is more than or equal to 100.00 degrees and less than or equal to 135.00 degrees; f2/f is more than or equal to 1.00 and less than or equal to 5.00; -5.00. ltoreq. f 6/f. ltoreq.1.50; d1/d5 is more than or equal to 0.60 and less than or equal to 1.00. The camera optical lens provided by the invention has good optical performance and meets the design requirements of wide angle and ultra-thinness.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of optical lenses, and more particularly, to an imaging optical lens suitable for portable terminal devices such as smart phones and digital cameras, and imaging apparatuses such as monitors and PC lenses.
[ background of the invention ]
In recent years, with the rise of smart phones, the demand of miniaturized camera lenses is increasing, and the photosensitive devices of general camera lenses are not limited to two types, namely, a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS) Device, and due to the refinement of Semiconductor manufacturing technology, the pixel size of the photosensitive devices is reduced, and in addition, the current electronic products are developed in a form of being excellent in function, light, thin, short and small, so that the miniaturized camera lenses with good imaging quality are the mainstream in the current market.
In order to obtain better imaging quality, the lens mounted on the mobile phone camera conventionally adopts a three-piece, four-piece, five-piece or even six-piece lens structure. However, with the development of technology and the increasing demand of diversified users, under the condition that the pixel area of the photosensitive device is continuously reduced and the requirement of the system for the imaging quality is continuously improved, the seven-piece lens structure gradually appears in the lens design, although the common seven-piece lens has good optical performance, the focal power, the lens distance and the lens shape setting still have certain irrationality, so that the design requirements of ultra-thinning and wide-angle cannot be met while the lens structure has good optical performance.
[ summary of the invention ]
In view of the above problems, an object of the present invention is to provide an imaging optical lens that has good optical performance and satisfies the design requirements of ultra-thinning and wide-angle.
To solve the above-mentioned problems, the present invention provides an imaging optical lens, in order from an object side to an image side, comprising: a first lens element with negative refractive power, a second lens element with positive refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element, a sixth lens element, and a seventh lens element;
the imaging optical lens has a focal length f, the second lens has a focal length f2, the sixth lens has a focal length f6, the first lens has an on-axis thickness d1, the third lens has an on-axis thickness d5, and the imaging optical lens has a maximum field angle FOV which satisfies the following relationship:
100.00°≤FOV≤135.00°；1.00≤f2/f≤5.00；
-5.00≤f6/f≤1.50；0.60≤d1/d5≤1.00。
preferably, the object-side surface of the first lens element is concave in the paraxial region, and the image-side surface thereof is concave in the paraxial region;
the focal length of the first lens is f1, the curvature radius of the object-side surface of the first lens is R1, the curvature radius of the image-side surface of the first lens is R2, and the total optical length of the imaging optical lens is TTL and satisfies the following relational expression:
-3.96≤f1/f≤-0.83；-0.94≤(R1+R2)/(R1-R2)≤0.79；
0.04≤d1/TTL≤0.20。
preferably, the imaging optical lens satisfies the following relational expression:
-2.48≤f1/f≤-1.04；-0.59≤(R1+R2)/(R1-R2)≤0.64；
0.06≤d1/TTL≤0.16。
preferably, the object-side surface of the second lens element is convex in the paraxial region, and the image-side surface thereof is concave in the paraxial region;
the curvature radius of the object side surface of the second lens is R3, the curvature radius of the image side surface of the second lens is R4, the on-axis thickness of the second lens is d3, the total optical length of the shooting optical lens is TTL, and the following relational expression is satisfied:
-12.39≤(R3+R4)/(R3-R4)≤-1.08；0.04≤d3/TTL≤0.13。
preferably, the imaging optical lens satisfies the following relational expression:
-7.75≤(R3+R4)/(R3-R4)≤-1.35；0.06≤d3/TTL≤0.10。
preferably, the object-side surface of the third lens element is convex in the paraxial region, and the image-side surface thereof is convex in the paraxial region;
the focal length of the third lens is f3, the curvature radius of the object-side surface of the third lens is R5, the curvature radius of the image-side surface of the third lens is R6, and the total optical length of the imaging optical lens is TTL and satisfies the following relation:
0.39≤f3/f≤1.71；0.13≤(R5+R6)/(R5-R6)≤0.70；
0.06≤d5/TTL≤0.22。
preferably, the imaging optical lens satisfies the following relational expression:
0.63≤f3/f≤1.37；0.21≤(R5+R6)/(R5-R6)≤0.56；
0.10≤d5/TTL≤0.17。
preferably, the object side surface of the fourth lens is concave at the paraxial region;
the focal length of the fourth lens is f4, the curvature radius of the object-side surface of the fourth lens is R7, the curvature radius of the image-side surface of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied:
-3.68≤f4/f≤-0.60；-3.26≤(R7+R8)/(R7-R8)≤-0.31；
0.02≤d7/TTL≤0.13。
preferably, the imaging optical lens satisfies the following relational expression:
-2.30≤f4/f≤-0.75；-2.04≤(R7+R8)/(R7-R8)≤-0.38；
0.03≤d7/TTL≤0.10。
preferably, the image-side surface of the fifth lens element is convex at the paraxial region;
the focal length of the fifth lens element is f5, the curvature radius of the object-side surface of the fifth lens element is R9, the curvature radius of the image-side surface of the fifth lens element is R10, the on-axis thickness of the fifth lens element is d9, and the total optical length of the imaging optical lens system is TTL, which satisfies the following relationship:
-29.38≤f5/f≤5.15；-25.30≤(R9+R10)/(R9-R10)≤3.71；
0.02≤d9/TTL≤0.12。
preferably, the imaging optical lens satisfies the following relational expression:
-18.36≤f5/f≤4.12；-15.81≤(R9+R10)/(R9-R10)≤2.97；
0.04≤d9/TTL≤0.10。
preferably, the image-side surface of the sixth lens element is concave at the paraxial region;
the curvature radius of the object-side surface of the sixth lens element is R11, the curvature radius of the image-side surface of the sixth lens element is R12, the on-axis thickness of the sixth lens element is d11, and the total optical length of the imaging optical lens system is TTL, which satisfies the following relation:
-5.66≤(R11+R12)/(R11-R12)≤4.55；0.02≤d11/TTL≤0.17。
preferably, the imaging optical lens satisfies the following relational expression:
-3.54≤(R11+R12)/(R11-R12)≤3.64；0.04≤d11/TTL≤0.13。
preferably, the image side surface of the seventh lens is concave at the paraxial region;
the focal length of the seventh lens element is f7, the curvature radius of the object-side surface of the seventh lens element is R13, the curvature radius of the image-side surface of the seventh lens element is R14, the on-axis thickness of the seventh lens element is d13, and the total optical length of the imaging optical lens system is TTL, which satisfies the following relationship:
-2.03≤f7/f≤8.56；-7.66≤(R13+R14)/(R13-R14)≤0.66；
0.05≤d13/TTL≤0.18。
preferably, the imaging optical lens satisfies the following relational expression:
-1.27≤f7/f≤6.85；-4.78≤(R13+R14)/(R13-R14)≤0.53；
0.07≤d13/TTL≤0.14。
preferably, the total optical length TTL of the image pickup optical lens is less than or equal to 8.79 mm.
Preferably, the total optical length TTL of the image pickup optical lens is less than or equal to 8.39 millimeters.
Preferably, the F-number of the imaging optical lens is less than or equal to 2.43.
Preferably, the F-number of the imaging optical lens is 2.38 or less.
The invention has the advantages that the pick-up optical lens has good optical performance, wide angle and ultrathin property, and is particularly suitable for mobile phone pick-up lens components and WEB pick-up lenses which are composed of pick-up elements such as CCD and CMOS for high pixel.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic configuration diagram of an imaging optical lens according to a first embodiment;
fig. 2 is a schematic view of axial aberrations of the image-taking optical lens shown in fig. 1;
fig. 3 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in fig. 1;
FIG. 4 is a schematic view of curvature of field and distortion of the imaging optical lens shown in FIG. 1;
fig. 5 is a schematic configuration diagram of an imaging optical lens according to a second embodiment;
fig. 6 is a schematic view of axial aberrations of the image pickup optical lens shown in fig. 5;
fig. 7 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in fig. 5;
FIG. 8 is a schematic view of curvature of field and distortion of the imaging optical lens shown in FIG. 5;
fig. 9 is a schematic configuration diagram of an imaging optical lens according to a third embodiment;
fig. 10 is a schematic view of axial aberrations of the image pickup optical lens shown in fig. 9;
fig. 11 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in fig. 9;
fig. 12 is a schematic view of curvature of field and distortion of the imaging optical lens shown in fig. 9.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.
(first embodiment)
Referring to the drawings, the present invention provides an image pickup optical lens 10. Fig. 1 shows an image pickup optical lens 10 according to a first embodiment of the present invention, and the image pickup optical lens 10 includes seven lenses. Specifically, the imaging optical lens 10, in order from an object side to an image side, includes: the zoom lens comprises a first lens element L1 with negative refractive power, a second lens element L2 with positive refractive power, a stop S1, a third lens element L3 with positive refractive power, a fourth lens element L4 with negative refractive power, a fifth lens element L5, a sixth lens element L6 and a seventh lens element L7. An optical element such as an optical filter (filter) GF may be disposed between the seventh lens L7 and the image plane Si.
The first lens L1 is made of plastic, the second lens L2 is made of plastic, the third lens L3 is made of plastic, the fourth lens L4 is made of plastic, the fifth lens L5 is made of plastic, the sixth lens L6 is made of plastic, and the seventh lens L7 is made of plastic.
Defining the maximum field angle of the image pickup optical lens 10 as FOV, and satisfying the following relation: FOV is more than or equal to 100.00 degrees and less than or equal to 135.00 degrees. In the range where the field angle of the imaging optical lens 10 satisfies the relational expression, ultra-wide-angle imaging can be realized, and user experience is improved.
The focal length of the image pickup optical lens 10 is f, the focal length of the second lens L2 is f2, and the following relations are satisfied: f2/f is more than or equal to 1.00 and less than or equal to 5.00, and the positive focal power of the second lens L2 is controlled in a reasonable range, so that the aberration of the optical system can be corrected.
The focal length of the sixth lens L6 is f6, and the following relation is satisfied: 5.00 ≦ f6/f ≦ 1.50, which allows better imaging quality and lower sensitivity of the system by a reasonable distribution of the powers.
The first lens L1 has an on-axis thickness d1, and the third lens L3 has an on-axis thickness d5, and satisfies the following relationships: d1/d5 is more than or equal to 0.60 and less than or equal to 1.00, the ratio of the axial thickness of the first lens L1 to the axial thickness of the second lens L2 is regulated, and when the ratio is within the range, the lens is beneficial to the development of wide angle.
In this embodiment, the object-side surface of the first lens element L1 is concave in the paraxial region, and the image-side surface thereof is concave in the paraxial region.
The focal length of the first lens L1 is f1, and the following relation is satisfied: -3.96 ≦ f1/f ≦ -0.83, defining the ratio of negative refractive power to overall focal length for the first lens element L1. Within the predetermined range, the first lens element L1 has a suitable negative refractive power, which is beneficial to reducing system aberration and is beneficial to the development of ultra-thin and wide-angle lenses. Preferably, -2.48. ltoreq. f 1/f. ltoreq. 1.04.
The curvature radius R1 of the object side surface of the first lens L1 and the curvature radius R2 of the image side surface of the first lens L1 satisfy the following relations: 0.94 ≦ (R1+ R2)/(R1-R2) ≦ 0.79, and the shape of the first lens L1 is controlled appropriately so that the first lens L1 can correct the system spherical aberration effectively. Preferably, -0.59 ≦ (R1+ R2)/(R1-R2) ≦ 0.64.
The on-axis thickness of the first lens L1 is d1, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d1/TTL is more than or equal to 0.04 and less than or equal to 0.20, and ultra-thinning is facilitated. Preferably, 0.06. ltoreq. d 1/TTL. ltoreq.0.16.
In this embodiment, the object-side surface of the second lens element L2 is convex and the image-side surface thereof is concave.
The curvature radius R3 of the object side surface of the second lens L2 and the curvature radius R4 of the image side surface of the second lens L2 satisfy the following relations: the shape of the second lens L2 is regulated to be not less than 12.39 (R3+ R4)/(R3-R4) and not more than-1.08, and the problem of chromatic aberration on the axis can be favorably corrected as the lens is changed to a super-thin wide angle within the range. Preferably, -7.75 ≦ (R3+ R4)/(R3-R4). ltoreq.1.35.
The on-axis thickness of the second lens L2 is d3, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d3/TTL is more than or equal to 0.04 and less than or equal to 0.13, and ultra-thinning is facilitated. Preferably, 0.06. ltoreq. d 3/TTL. ltoreq.0.10.
In this embodiment, the object-side surface of the third lens element L3 is convex in the paraxial region thereof, and the image-side surface thereof is convex in the paraxial region thereof.
The third lens L3 has a focal length f3, and satisfies the following relationship: f3/f is more than or equal to 0.39 and less than or equal to 1.71, and the system has better imaging quality and lower sensitivity through reasonable distribution of the focal power. Preferably, 0.63. ltoreq. f 3/f. ltoreq.1.37.
The curvature radius of the object side surface of the third lens L3 is R5, the curvature radius of the image side surface of the third lens L3 is R6, and the following relations are satisfied: the (R5+ R6)/(R5-R6) is not more than 0.13 and not more than 0.70, the shape of the third lens L3 can be effectively controlled, the molding of the third lens L3 is facilitated, the deflection degree of light rays passing through the lens can be alleviated within the range specified by the conditional expression, and the aberration can be effectively reduced. Preferably, 0.21 ≦ (R5+ R6)/(R5-R6). ltoreq.0.56.
The on-axis thickness of the third lens L3 is d5, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d5/TTL is more than or equal to 0.06 and less than or equal to 0.22, and ultra-thinning is facilitated. Preferably, 0.10. ltoreq. d 5/TTL. ltoreq.0.17.
In the present embodiment, the object-side surface of the fourth lens element L4 is concave in the paraxial region.
The focal length f4 of the fourth lens L4 satisfies the following relation: 3.68 ≦ f4/f ≦ -0.60, allowing better imaging quality and lower sensitivity of the system through reasonable distribution of optical power. Preferably-2.30. ltoreq. f 4/f. ltoreq-0.75.
The curvature radius R7 of the object side surface of the fourth lens L4 and the curvature radius R8 of the image side surface of the fourth lens L4 satisfy the following relations: -3.26 ≦ (R7+ R8)/(R7-R8) ≦ -0.31, and the shape of the fourth lens L4 is defined to be advantageous for correcting the aberration of the off-axis angle and the like with the development of an ultra-thin and wide-angle when the shape is within the range. Preferably, -2.04 ≦ (R7+ R8)/(R7-R8) ≦ -0.38.
The on-axis thickness of the fourth lens L4 is d7, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d7/TTL is more than or equal to 0.02 and less than or equal to 0.13, and ultra-thinning is facilitated. Preferably, 0.03. ltoreq. d 7/TTL. ltoreq.0.10.
In the present embodiment, the image-side surface of the fifth lens L5 is convex in the paraxial region.
The focal length f5 of the fifth lens L5 satisfies the following relation: 29.38 ≦ f5/f ≦ 5.15, and the definition of the fifth lens L5 is effective to make the light angle of the camera lens gentle and reduce the tolerance sensitivity. Preferably-18.36. ltoreq. f 5/f. ltoreq.4.12.
The curvature radius R9 of the object side surface of the fifth lens L5 and the curvature radius R10 of the image side surface of the fifth lens L5 satisfy the following relations: -25.30 ≦ (R9+ R10)/(R9-R10) ≦ 3.71, and the shape of the fifth lens L5 is specified, and when the conditions are within the range, it is advantageous to correct the aberration of the off-axis view angle and the like as the ultra-thin wide angle is developed. Preferably, -15.81 ≦ (R9+ R10)/(R9-R10). ltoreq.2.97.
The on-axis thickness of the fifth lens L5 is d9, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d9/TTL is more than or equal to 0.02 and less than or equal to 0.12, and ultra-thinning is facilitated. Preferably, 0.04. ltoreq. d 9/TTL. ltoreq.0.10.
In the present embodiment, the image-side surface of the sixth lens L6 is concave in the paraxial region.
The curvature radius R11 of the object side surface of the sixth lens L6 and the curvature radius R12 of the image side surface of the sixth lens L6 satisfy the following relations: -5.66 ≦ (R11+ R12)/(R11-R12) ≦ 4.55, and the shape of the sixth lens L6 is specified, and when the conditions are within the range, it is advantageous to correct the aberration of the off-axis view angle and the like as the ultra-thin wide angle is developed. Preferably, -3.54 ≦ (R11+ R12)/(R11-R12). ltoreq.3.64.
The on-axis thickness of the sixth lens L6 is d11, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d11/TTL is more than or equal to 0.02 and less than or equal to 0.17, and ultra-thinning is facilitated. Preferably, 0.04. ltoreq. d 11/TTL. ltoreq.0.13.
In the present embodiment, the image-side surface of the seventh lens L7 is concave in the paraxial region.
The focal length of the entire image pickup optical lens 10 is f, and the focal length of the seventh lens L7 is f7, and the following relations are satisfied: 2.03 ≦ f7/f ≦ 8.56, which allows better imaging quality and lower sensitivity of the system by a reasonable distribution of the powers. Preferably, -1.27. ltoreq. f 7/f. ltoreq.6.85.
The curvature radius of the image side surface of the seventh lens is R14, the on-axis thickness of the seventh lens is d13, and the following relational expression is satisfied: 7.66 ≦ (R13+ R14)/(R13-R14) ≦ 0.66, and the shape of the sixth lens L6 is specified, and when the conditions are within the range, it is advantageous to correct the aberration of the off-axis view angle and the like as the ultra-thin wide angle is developed. Preferably, -4.78 ≦ (R13+ R14)/(R13-R14). ltoreq.0.53.
The on-axis thickness of the seventh lens L7 is d13, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied: d13/TTL is more than or equal to 0.05 and less than or equal to 0.18, and ultra-thinning is facilitated. Preferably, 0.07. ltoreq. d 13/TTL. ltoreq.0.14.
In this embodiment, the total optical length TTL of the image pickup optical lens 10 is less than or equal to 8.79 mm, which is beneficial to achieving ultra-thinning. Preferably, the total optical length TTL of the image-taking optical lens 10 is less than or equal to 8.39 millimeters.
In the present embodiment, the number of apertures F of the imaging optical lens 10 is 2.43 or less. The large aperture is large, and the imaging performance is good. Preferably, the F-number of the imaging optical lens 10 is 2.38 or less.
With such a design, the total optical length TTL of the entire imaging optical lens 10 can be made as short as possible, and the characteristic of miniaturization can be maintained.
That is, when the above relation is satisfied, the imaging optical lens 10 can satisfy the design requirements of wide angle and ultra-thin while having good optical imaging performance; in accordance with the characteristics of the imaging optical lens 10, the imaging optical lens 10 is particularly suitable for a mobile phone imaging lens module and a WEB imaging lens which are configured by an imaging element such as a high-pixel CCD or a CMOS.
The image pickup optical lens 10 of the present invention will be explained below by way of example. The symbols described in the respective examples are as follows. The unit of focal length, on-axis distance, curvature radius, on-axis thickness, position of reverse curvature and position of stagnation point is mm.
TTL: the total optical length (on-axis distance from the object side surface of the first lens L1 to the image plane Si) is in mm;
preferably, the object side surface and/or the image side surface of the lens may be further provided with an inflection point and/or a stagnation point to meet the requirement of high-quality imaging.
Tables 1 and 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.
[ TABLE 1 ]
Wherein each symbol has the following meaning.
S1: an aperture;
r: the radius of curvature of the optical surface and the radius of curvature of the lens as the center;
r1: the radius of curvature of the object-side surface of the first lens L1;
r2: the radius of curvature of the image-side surface of the first lens L1;
r3: the radius of curvature of the object-side surface of the second lens L2;
r4: the radius of curvature of the image-side surface of the second lens L2;
r5: the radius of curvature of the object-side surface of the third lens L3;
r6: the radius of curvature of the image-side surface of the third lens L3;
r7: the radius of curvature of the object-side surface of the fourth lens L4;
r8: the radius of curvature of the image-side surface of the fourth lens L4;
r9: a radius of curvature of the object side surface of the fifth lens L5;
r10: a radius of curvature of the image-side surface of the fifth lens L5;
r11: a radius of curvature of the object side surface of the sixth lens L6;
r12: a radius of curvature of the image-side surface of the sixth lens L6;
r13: a radius of curvature of the object side surface of the seventh lens L7;
r14: a radius of curvature of the image-side surface of the seventh lens L7;
r15: radius of curvature of the object side of the optical filter GF;
r16: the radius of curvature of the image-side surface of the optical filter GF;
d: an on-axis thickness of the lenses and an on-axis distance between the lenses;
d 0: the on-axis distance of the stop S1 to the object-side surface of the first lens L1;
d 1: the on-axis thickness of the first lens L1;
d 2: the on-axis distance from the image-side surface of the first lens L1 to the object-side surface of the second lens L2;
d 3: the on-axis thickness of the second lens L2;
d 4: the on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3;
d 5: the on-axis thickness of the third lens L3;
d 6: the on-axis distance from the image-side surface of the third lens L3 to the object-side surface of the fourth lens L4;
d 7: the on-axis thickness of the fourth lens L4;
d 8: an on-axis distance from an image-side surface of the fourth lens L4 to an object-side surface of the fifth lens L5;
d 9: the on-axis thickness of the fifth lens L5;
d 10: an on-axis distance from an image-side surface of the fifth lens L5 to an object-side surface of the sixth lens L6;
d 11: the on-axis thickness of the sixth lens L6;
d 12: an on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the seventh lens L7;
d 13: the on-axis thickness of the seventh lens L7;
d 14: the on-axis distance from the image-side surface of the seventh lens L7 to the object-side surface of the optical filter GF;
d 15: on-axis thickness of the optical filter GF;
d 16: the on-axis distance from the image side surface of the optical filter GF to the image surface;
nd: the refractive index of the d-line;
nd 1: the refractive index of the d-line of the first lens L1;
nd 2: the refractive index of the d-line of the second lens L2;
nd 3: the refractive index of the d-line of the third lens L3;
nd 4: the refractive index of the d-line of the fourth lens L4;
nd 5: the refractive index of the d-line of the fifth lens L5;
nd 6: the refractive index of the d-line of the sixth lens L6;
nd 7: the refractive index of the d-line of the seventh lens L7;
ndg: the refractive index of the d-line of the optical filter GF;
v d: an Abbe number;
v 1: abbe number of the first lens L1;
v 2: abbe number of the second lens L2;
v 3: abbe number of the third lens L3;
v 4: abbe number of the fourth lens L4;
v 5: abbe number of the fifth lens L5;
v 6: abbe number of the sixth lens L6;
v 7: abbe number of the seventh lens L7;
v g: abbe number of the optical filter GF.
Table 2 shows aspherical surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.
[ TABLE 2 ]
Wherein k is a conic coefficient, and A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspheric coefficients.
y＝(x2/R)/[1+{1-(k+1)(x2/R2)}1/2]+A4x4+A6x6+A8x8+A10x10+A12x12+A14x14+A16x16+A18x18+A20x20(1)
For convenience, the aspherical surface of each lens surface uses the aspherical surface shown in the above formula (1). However, the present invention is not limited to the aspherical polynomial form expressed by this formula (1).
Tables 3 and 4 show the inflection point and stagnation point design data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention. P1R1 and P1R2 represent the object-side surface and the image-side surface of the first lens L1, P2R1 and P2R2 represent the object-side surface and the image-side surface of the second lens L2, P3R1 and P3R2 represent the object-side surface and the image-side surface of the third lens L3, P4R1 and P4R2 represent the object-side surface and the image-side surface of the fourth lens L4, P5R1 and P5R2 represent the object-side surface and the image-side surface of the fifth lens L5, P6R1 and P6R2 represent the object-side surface and the image-side surface of the sixth lens L6, and P7R1 and P7R2 represent the object-side surface and the image-side surface of the seventh lens L7, respectively. The "inflection point position" field correspondence data is a vertical distance from an inflection point set on each lens surface to the optical axis of the image pickup optical lens 10. The "stagnation point position" field corresponding data is the vertical distance from the stagnation point set on each lens surface to the optical axis of the imaging optical lens 10.
[ TABLE 3 ]
[ TABLE 4 ]
| Number of stagnation points | Location of |
Location of stagnation 2 | |
| |
1 | 1.305 | 0 |
| |
0 | 0 | 0 |
| |
1 | 1.025 | 0 |
| |
1 | 0.635 | 0 |
| |
1 | 0.745 | 0 |
| |
0 | 0 | 0 |
| |
0 | 0 | 0 |
| P4R2 | 2 | 0.185 | 0.325 |
| P5R1 | 2 | 0.255 | 0.455 |
| |
1 | 1.185 | 0 |
| |
1 | 0.815 | 0 |
| |
1 | 0.975 | 0 |
| |
0 | 0 | 0 |
| |
1 | 1.085 | 0 |
Fig. 2 and 3 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 470nm, 555nm, and 650nm, respectively, after passing through the imaging optical lens 10 according to the first embodiment. Fig. 4 is a schematic view showing curvature of field and distortion of light having a wavelength of 555nm after passing through the imaging optical lens 10 according to the first embodiment, where S is curvature of field in the sagittal direction and T is curvature of field in the tangential direction in fig. 4.
Table 13 shown later shows values corresponding to the parameters defined in the conditional expressions, for each of the numerical values in the first, second, and third embodiments.
As shown in table 13, the first embodiment satisfies each conditional expression.
In the present embodiment, the imaging optical lens 10 has an entrance pupil diameter of 1.463mm, a full field image height of 3.248mm, and a maximum field angle of 100.26 °, so that the imaging optical lens 10 has a wide angle and a slim profile, and has excellent optical characteristics with sufficiently corrected on-axis and off-axis chromatic aberration.
(second embodiment)
The second embodiment is basically the same as the first embodiment, and the reference numerals are the same as those in the first embodiment, and the configuration of the image pickup optical lens 20 of the second embodiment is shown in fig. 5, and only the differences will be described below.
Tables 5 and 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.
[ TABLE 5 ]
Table 6 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
[ TABLE 6 ]
Tables 7 and 8 show the inflection point and stagnation point design data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
[ TABLE 7 ]
| Number of points of inflection | Position of |
Position of reverse curvature 2 | Position of reverse curvature 3 | |
| P1R1 | 2 | 0.695 | 3.625 | 0 |
| |
1 | 1.815 | 0 | 0 |
| |
1 | 1.375 | 0 | 0 |
| |
1 | 1.055 | 0 | 0 |
| |
1 | 0.535 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
1 | 0.105 | 0 | 0 |
| |
1 | 0.345 | 0 | 0 |
| P5R2 | 3 | 0.185 | 0.465 | 1.285 |
| P6R1 | 3 | 0.145 | 0.465 | 1.365 |
| P6R2 | 3 | 0.565 | 1.835 | 1.995 |
| P7R1 | 2 | 0.385 | 1.725 | 0 |
| P7R2 | 2 | 0.515 | 2.525 | 0 |
[ TABLE 8 ]
Fig. 6 and 7 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 470nm, 555nm, and 650nm, respectively, after passing through the imaging optical lens 20 according to the second embodiment. Fig. 8 is a schematic view showing curvature of field and distortion of light having a wavelength of 555nm after passing through the imaging optical lens 20 according to the second embodiment.
Table 13 below shows the numerical values corresponding to the respective conditional expressions in the present embodiment, in accordance with the conditional expressions described above. Obviously, the imaging optical lens of the present embodiment satisfies the above conditional expressions.
In the present embodiment, the imaging optical lens 20 has an entrance pupil diameter of 0.919mm, a full field image height of 3.248mm, and a maximum field angle of 122.40 °, so that it has a wide angle of view, is made thinner, has a sufficient correction of on-axis and off-axis chromatic aberration, and has excellent optical characteristics.
(third embodiment)
The third embodiment is basically the same as the first embodiment, and the reference numerals are the same as those in the first embodiment, and the configuration of the imaging optical lens 30 of the third embodiment is shown in fig. 9, and only the differences will be described below.
Tables 9 and 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.
[ TABLE 9 ]
Table 10 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.
[ TABLE 10 ]
Tables 11 and 12 show the inflection points and the stagnation point design data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.
[ TABLE 11 ]
[ TABLE 12 ]
| Number of stagnation points | Location of |
Stationed pointPosition 2 | |
| |
1 | 0.755 | 0 |
| |
0 | 0 | 0 |
| |
0 | 0 | 0 |
| |
0 | 0 | 0 |
| |
0 | 0 | 0 |
| |
0 | 0 | 0 |
| |
0 | 0 | 0 |
| P4R2 | 2 | 0.315 | 1.035 |
| |
0 | 0 | 0 |
| |
0 | 0 | 0 |
| |
1 | 0.605 | 0 |
| |
1 | 0.975 | 0 |
| |
1 | 1.085 | 0 |
| |
1 | 1.315 | 0 |
Fig. 10 and 11 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 470nm, 555nm, and 650nm, respectively, after passing through the imaging optical lens 30 according to the third embodiment. Fig. 12 is a schematic view showing curvature of field and distortion of light having a wavelength of 555nm after passing through the imaging optical lens 30 according to the third embodiment.
Table 13 below shows the numerical values corresponding to the respective conditional expressions in the present embodiment, in accordance with the conditional expressions described above. Obviously, the imaging optical lens of the present embodiment satisfies the above conditional expressions.
In the present embodiment, the imaging optical lens has an entrance pupil diameter of 0.627mm, a full field height of 3.248mm, and a maximum field angle of 134.71 °, so that the imaging optical lens 30 has a wide angle of view, is made thinner, has a sufficient correction for on-axis and off-axis chromatic aberration, and has excellent optical characteristics.
[ TABLE 13 ]
Where Fno is the F-number of the diaphragm of the imaging optical lens.
f12 is the combined focal length of the first lens and the second lens.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (19)
1. An imaging optical lens, in order from an object side to an image side, comprising: a first lens element with negative refractive power, a second lens element with positive refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element, a sixth lens element, and a seventh lens element;
the imaging optical lens has a focal length f, the second lens has a focal length f2, the sixth lens has a focal length f6, the first lens has an on-axis thickness d1, the third lens has an on-axis thickness d5, and the imaging optical lens has a maximum field angle FOV which satisfies the following relationship:
100.00°≤FOV≤135.00°；
1.00≤f2/f≤5.00；
-5.00≤f6/f≤1.50；
0.60≤d1/d5≤1.00。
2. the imaging optical lens of claim 1, wherein the first lens element has a concave object-side surface and a concave image-side surface;
the focal length of the first lens is f1, the curvature radius of the object-side surface of the first lens is R1, the curvature radius of the image-side surface of the first lens is R2, and the total optical length of the imaging optical lens is TTL and satisfies the following relational expression:
-3.96≤f1/f≤-0.83；
-0.94≤(R1+R2)/(R1-R2)≤0.79；
0.04≤d1/TTL≤0.20。
3. the imaging optical lens according to claim 2, wherein the imaging optical lens satisfies the following relationship:
-2.48≤f1/f≤-1.04；
-0.59≤(R1+R2)/(R1-R2)≤0.64；
0.06≤d1/TTL≤0.16。
4. the imaging optical lens assembly of claim 1, wherein the second lens element has a convex object-side surface and a concave image-side surface;
the curvature radius of the object side surface of the second lens is R3, the curvature radius of the image side surface of the second lens is R4, the on-axis thickness of the second lens is d3, the total optical length of the shooting optical lens is TTL, and the following relational expression is satisfied:
-12.39≤(R3+R4)/(R3-R4)≤-1.08；
0.04≤d3/TTL≤0.13。
5. the imaging optical lens according to claim 4, wherein the imaging optical lens satisfies the following relation:
-7.75≤(R3+R4)/(R3-R4)≤-1.35；
0.06≤d3/TTL≤0.10。
6. the imaging optical lens assembly of claim 1, wherein the third lens element has a convex object-side surface and a convex image-side surface;
the focal length of the third lens is f3, the curvature radius of the object-side surface of the third lens is R5, the curvature radius of the image-side surface of the third lens is R6, and the total optical length of the imaging optical lens is TTL and satisfies the following relation:
0.39≤f3/f≤1.71；
0.13≤(R5+R6)/(R5-R6)≤0.70；
0.06≤d5/TTL≤0.22。
7. the imaging optical lens according to claim 6, wherein the imaging optical lens satisfies the following relation:
0.63≤f3/f≤1.37；
0.21≤(R5+R6)/(R5-R6)≤0.56；
0.10≤d5/TTL≤0.17。
8. the image-capturing optical lens of claim 1, wherein the fourth lens object-side surface is concave at a paraxial region;
the focal length of the fourth lens is f4, the curvature radius of the object-side surface of the fourth lens is R7, the curvature radius of the image-side surface of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, the total optical length of the imaging optical lens is TTL, and the following relational expression is satisfied:
-3.68≤f4/f≤-0.60；
-3.26≤(R7+R8)/(R7-R8)≤-0.31；
0.02≤d7/TTL≤0.13。
9. the image-pickup optical lens according to claim 8, wherein the image-pickup optical lens satisfies the following relation:
-2.30≤f4/f≤-0.75；
-2.04≤(R7+R8)/(R7-R8)≤-0.38；
0.03≤d7/TTL≤0.10。
10. the imaging optical lens of claim 1, wherein the fifth lens image side surface is convex at the paraxial region;
the focal length of the fifth lens element is f5, the curvature radius of the object-side surface of the fifth lens element is R9, the curvature radius of the image-side surface of the fifth lens element is R10, the on-axis thickness of the fifth lens element is d9, and the total optical length of the imaging optical lens system is TTL, which satisfies the following relationship:
-29.38≤f5/f≤5.15；
-25.30≤(R9+R10)/(R9-R10)≤3.71；
0.02≤d9/TTL≤0.12。
11. the image-pickup optical lens according to claim 10, wherein the image-pickup optical lens satisfies the following relation:
-18.36≤f5/f≤4.12；
-15.81≤(R9+R10)/(R9-R10)≤2.97；
0.04≤d9/TTL≤0.10。
12. the imaging optical lens of claim 1, wherein the sixth lens image-side surface is concave at the paraxial region;
the curvature radius of the object-side surface of the sixth lens element is R11, the curvature radius of the image-side surface of the sixth lens element is R12, the on-axis thickness of the sixth lens element is d11, and the total optical length of the imaging optical lens system is TTL, which satisfies the following relation:
-5.66≤(R11+R12)/(R11-R12)≤4.55；
0.02≤d11/TTL≤0.17。
13. the image-pickup optical lens according to claim 12, wherein the image-pickup optical lens satisfies the following relation:
-3.54≤(R11+R12)/(R11-R12)≤3.64；
0.04≤d11/TTL≤0.13。
14. the imaging optical lens of claim 1, wherein the seventh lens image-side surface is concave at the paraxial region;
the focal length of the seventh lens element is f7, the curvature radius of the object-side surface of the seventh lens element is R13, the curvature radius of the image-side surface of the seventh lens element is R14, the on-axis thickness of the seventh lens element is d13, and the total optical length of the imaging optical lens system is TTL, which satisfies the following relationship:
-2.03≤f7/f≤8.56；
-7.66≤(R13+R14)/(R13-R14)≤0.66；
0.05≤d13/TTL≤0.18。
15. the image-pickup optical lens according to claim 14, wherein the image-pickup optical lens satisfies the following relation:
-1.27≤f7/f≤6.85；
-4.78≤(R13+R14)/(R13-R14)≤0.53；
0.07≤d13/TTL≤0.14。
16. a camera optical lens according to claim 1, characterized in that the total optical length TTL of the camera optical lens is less than or equal to 8.79 mm.
17. A camera optical lens according to claim 16, characterized in that the total optical length TTL of the camera optical lens is less than or equal to 8.39 mm.
18. A camera optical lens according to claim 1, characterized in that the F-number of the aperture of the camera optical lens is less than or equal to 2.43.
19. A camera optical lens according to claim 18, characterized in that the F-number of the aperture of the camera optical lens is less than or equal to 2.38.
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