CN110262005B - Image pickup optical lens - Google Patents
Image pickup optical lens Download PDFInfo
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- CN110262005B CN110262005B CN201910581571.1A CN201910581571A CN110262005B CN 110262005 B CN110262005 B CN 110262005B CN 201910581571 A CN201910581571 A CN 201910581571A CN 110262005 B CN110262005 B CN 110262005B
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The invention provides a photographic optical lens, which comprises the following components in sequence from an object side to an image side: a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element with refractive power, a sixth lens element with positive refractive power, and a seventh lens element with negative refractive power; the focal length of the whole image pickup optical lens is f, the optical total length of the image pickup optical lens is TTL, the image height of the image pickup optical lens is IH, and the focal length of the second lens is f2, so that the following relational expression is satisfied: f/TTL is more than or equal to 0.85 and less than or equal to 1.02; TTL/IH is more than or equal to 1.30 and less than or equal to 1.40; f2/f is more than or equal to-3.00 and less than or equal to-1.50. The photographic optical lens has good optical performance and also meets the design requirements of large aperture, 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 ]
With the development of imaging technology, imaging optical lenses are widely used in various electronic products, such as smart phones and digital cameras. In order to be portable, people are increasingly pursuing the lightness and thinness of electronic products, and therefore, the small-sized image pickup optical lens with good imaging quality is the mainstream of the current market.
The imaging optical lens on the traditional electronic product adopts four-piece, five-piece, six-piece or even seven-piece lens structures, however, with the increase of diversified demands of users, however, with the development of technology and the increase of diversified demands of users, the pixel area of the photosensitive device is continuously reduced, and the requirements of the system on the imaging quality are continuously improved, the seven-piece lens structure gradually appears in the lens design, although the common seven-piece lens has better optical performance, the focal power, the lens distance and the lens shape still have certain irrationality, so that the lens structure can not meet the design requirements of large aperture, ultra-thinning and wide-angle while having good optical performance.
Therefore, it is necessary to provide an imaging optical lens having excellent optical performance and satisfying the design requirements of large aperture, wide angle and thinness.
[ summary of the invention ]
The invention aims to provide an imaging optical lens which has good optical performance and meets the design requirements of large aperture, ultra-thinning and wide angle.
The technical scheme of the invention is as follows:
to solve the above technical problem, an embodiment of the present invention provides an imaging optical lens, which includes, in order from an object side to an image side: a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element with refractive power, a sixth lens element with positive refractive power, and a seventh lens element with negative refractive power;
the focal length of the whole image pickup optical lens is f, the optical total length of the image pickup optical lens is TTL, the image height of the image pickup optical lens is IH, and the focal length of the second lens is f2, so that the following relational expression is satisfied:
0.85≤f/TTL≤1.02；
1.30≤TTL/IH≤1.40；
-3.00≤f2/f≤-1.50。
preferably, the focal length of the fourth lens is f4, and the following relation is satisfied:
-25.00≤f4/f≤-5.00。
preferably, the radius of curvature of the object-side surface of the third lens is R5, and the radius of curvature of the image-side surface of the third lens is R6, and the following relationships are satisfied:
-10.00≤(R5+R6)/(R5-R6)≤-3.00。
preferably, the focal length of the first lens is f1, the radius of curvature of the object-side surface of the first lens is R1, the radius of curvature of the image-side surface of the first lens is R2, and the on-axis thickness of the first lens is d1, and the following relationships are satisfied:
0.37≤f1/f≤1.52；
-5.92≤(R1+R2)/(R1-R2)≤-1.01；
0.05≤d1/TTL≤0.18。
preferably, the radius of curvature of the object-side surface of the second lens is R3, the radius of curvature of the image-side surface of the second lens is R4, the on-axis thickness of the second lens is d3, and the following relationship is satisfied:
0.94≤(R3+R4)/(R3-R4)≤7.47；
0.02≤d3/TTL≤0.06。
preferably, the focal length of the third lens is f3, the on-axis thickness of the third lens is d5, and the following relation is satisfied:
0.94≤f3/f≤5.21；
0.02≤d5/TTL≤0.10。
preferably, the radius of curvature of the object-side surface of the fourth lens is R7, the radius of curvature of the image-side surface of the fourth lens is R8, the on-axis thickness of the fourth lens is d7, and the following relationship is satisfied:
-0.73≤(R7+R8)/(R7-R8)≤28.23
0.02≤d7/TTL≤0.07。
preferably, the focal length of the fifth lens is f5, the curvature radius of the object-side surface of the fifth lens is R9, the curvature radius of the image-side surface of the fifth lens is R10, the on-axis thickness of the fifth lens is d9, and the following relationship is satisfied:
-246.84≤f5/f≤21.72；
0.13≤(R9+R10)/(R9-R10)≤81.62；
0.02≤d9/TTL≤0.07。
preferably, the focal length of the sixth lens is f6, the curvature radius of the object-side surface of the sixth lens is R11, the curvature radius of the image-side surface of the sixth lens is R12, the on-axis thickness of the sixth lens is d11, and the following relationship is satisfied:
0.49≤f6/f≤3.32；
-3.93≤(R11+R12)/(R11-R12)≤-0.99；
0.02≤d11/TTL≤0.14。
preferably, the focal length of the seventh lens is f7, the curvature radius of the object-side surface of the seventh lens is R13, 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 relationship is satisfied:
-2.00≤f7/f≤-0.48；
-1.19≤(R13+R14)/(R13-R14)≤0.09；
0.04≤d13/TTL≤0.14。
the invention has the beneficial effects that: the imaging optical lens according to the present invention has excellent optical characteristics, is extremely thin, has a wide angle, and sufficiently corrects chromatic aberration, and is particularly suitable for a mobile phone imaging lens unit and a WEB imaging lens which are configured by an imaging element such as a CCD or a CMOS for high pixel.
[ description of the drawings ]
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;
fig. 13 is a schematic configuration diagram of an imaging optical lens according to a fourth embodiment;
fig. 14 is a schematic view of axial aberrations of the image pickup optical lens shown in fig. 13;
fig. 15 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in fig. 13;
fig. 16 is a schematic view of curvature of field and distortion of the imaging optical lens shown in fig. 13;
fig. 17 is a schematic configuration diagram of an imaging optical lens of a fifth embodiment;
fig. 18 is a schematic view of axial aberrations of the image pickup optical lens shown in fig. 17;
fig. 19 is a schematic diagram of chromatic aberration of magnification of the imaging optical lens shown in fig. 17;
fig. 20 is a schematic view of curvature of field and distortion of the imaging optical lens shown in fig. 17.
[ detailed description ] embodiments
The invention is further described with reference to the following figures and 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.
The following is an embodiment one:
referring to fig. 1 to 4, an imaging optical lens 10 according to a first embodiment of the present invention is provided. In fig. 1, the left side is an object side, the right side is an image side, and the imaging optical lens 10 mainly includes seven coaxially disposed lenses, specifically, a stop S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 in order from the object side to the image side. A glass flat GF is arranged between the seventh lens L7 and the image plane Si, and the glass flat GF may be a glass cover plate or an optical filter.
Defining the focal length of the whole imaging optical lens 10 as f, the total optical length of the imaging optical lens as TTL, and satisfying the following relation: f/TTL is more than or equal to 0.85 and less than or equal to 1.02. The relation specifies the ratio of the optical focal length f to the total optical length TTL, and the system meeting the conditions has a longer focal length under the condition that the total length is fixed, so that the magnification of the system is improved.
Defining the image height of the image pickup optical lens as IH, and satisfying the following relational expression: TTL/IH is more than or equal to 1.30 and less than or equal to 1.40. The relation specifies the ratio of total optical length TTL to image height IH, and the system in the range has the characteristic of ultra-thinness.
Defining the focal length of the second lens L2 as f2, the following relation is satisfied: f2/f is more than or equal to-3.00 and less than or equal to-1.50. This relationship specifies the ratio of the focal length f2 of the second lens L2 to the system focal length f, and contributes to the improvement of the optical system performance in a range.
In the present embodiment, the focal length of the fourth lens L4 is defined as f4, and the following relation is satisfied: f4/f is more than or equal to-25.00 and less than or equal to-5.00. When f4/f satisfies the condition, the focal power of the fourth lens L4 can be effectively distributed, the aberration of the optical system is corrected, and the imaging quality is improved.
In the present embodiment, the curvature radius of the object-side surface of the third lens L3 is defined as R5, and the curvature radius of the image-side surface of the third lens L3 is defined as R6, and the following relationships are satisfied: the ratio of (R5+ R6)/(R5-R6) is not less than-10.00 and not more than-3.00. The shape of the third lens L3 is defined, and the degree of deflection of the light passing through the lens can be reduced within the range defined by the conditional expression, thereby effectively reducing the aberration.
When the focal length of the image pickup optical lens 10, the focal lengths of the respective lenses, the refractive indices of the respective lenses, the optical total length of the image pickup optical lens, the on-axis thickness, and the curvature radius satisfy the above-described relational expressions, the image pickup optical lens 10 can have high performance and meet the design requirement of low TTL.
The focal length of the first lens L1 is f1, and the following relation is satisfied: f1/f is more than or equal to 0.37 and less than or equal to 1.52. The ratio of the positive refractive power to the overall focal length of the first lens element L1 is specified. When the first lens element is within the specified range, the first lens element has proper positive refractive power, which is beneficial to reducing system aberration and is beneficial to the development of ultra-thinning and wide-angle lens.
The curvature radius of the object side surface of the first lens L1 is R1, the curvature radius of the image side surface of the first lens L1 is R2, and the following relational expression is satisfied: -5.92 ≦ (R1+ R2)/(R1-R2) ≦ -1.01, the shape of the first lens L1 is controlled appropriately so that the first lens L1 can correct the system spherical aberration effectively.
The first lens L1 has an on-axis thickness d1, and satisfies the following relation: d1/TTL is more than or equal to 0.05 and less than or equal to 0.18. And the ultra-thinning is favorably realized.
The curvature radius of the lens object side surface of the second lens L2 is R3, the curvature radius of the image side surface of the second lens L2 is R4, and the following relational expression is satisfied: the ratio of (R3+ R4)/(R3-R4) is not more than 0.94 and not more than 7.47. The shape of the second lens L2 is defined, and when the lens is within the range, the problem of chromatic aberration on the axis can be corrected favorably as the lens becomes thinner and wider.
Defining the total optical length of the image pickup optical lens as TTL, the on-axis thickness of the second lens L2 as d3, and satisfying the following relational expression: d3/TTL is more than or equal to 0.02 and less than or equal to 0.06, and ultra-thinning is facilitated.
The focal length of the third lens L3 is f3, and the following relation is satisfied: f3/f is more than or equal to 0.94 and less than or equal to 5.21, and the system has better imaging quality and lower sensitivity through reasonable distribution of the focal power.
Defining the total optical length of the image pickup optical lens as TTL, the on-axis thickness of the third lens L3 as d5, and satisfying the following relational expression: d5/TTL is more than or equal to 0.02 and less than or equal to 0.10, and ultra-thinning is facilitated.
The curvature radius of the object side surface of the fourth lens L4 is R7, the curvature radius of the image side surface of the fourth lens L4 is R8, and the following relational expression is satisfied: -0.73 ≦ (R7+ R8)/(R7-R8) 28.23. The shape of the fourth lens L4 is specified, and when the shape is within the range, the problem such as aberration of the off-axis view angle is favorably corrected along with the development of the ultrathin and wide-angle.
Defining the total optical length of the image pickup optical lens as TTL, the on-axis thickness of the fourth lens L4 as d7, and satisfying the following relational expression: d7/TTL is more than or equal to 0.02 and less than or equal to 0.07, and ultra-thinning is facilitated.
The focal length of the fifth lens L5 is f5, and the following relation is satisfied: f5/f 21.72 is more than or equal to-246.84, and the definition of the fifth lens L5 can effectively make the light angle of the camera lens smooth and reduce the tolerance sensitivity.
The curvature radius of the object side surface of the fifth lens L5 is R9, the curvature radius of the image side surface of the fifth lens is R10, and the following relational expression is satisfied: 0.13 ≤ (R9+ R10)/(R9-R10) ≤ 81.62, and the shape of the fifth lens L5 is determined, so that the aberration of the off-axis picture angle can be corrected with the development of ultra-thin wide angle under the condition.
Defining the total optical length of the image pickup optical lens as TTL, the on-axis thickness of the fifth lens L5 as d9, and satisfying the following relational expression: d9/TTL is more than or equal to 0.02 and less than or equal to 0.07, and ultra-thinning is facilitated.
The focal length of the sixth lens L6 is f6, and the following relation is satisfied: f6/f is more than or equal to 0.49 and less than or equal to 3.32, and the system has better imaging quality and lower sensitivity through reasonable distribution of the focal power.
The curvature radius of the object side surface of the sixth lens L6 is R11, the curvature radius of the image side surface of the sixth lens L6 is R12, and the following relational expression is satisfied: -3.93 ≦ (R11+ R12)/(R11-R12) ≦ -0.99, and it is specified that the shape of the sixth lens L6 is advantageous for correcting the off-axis aberration and the like as the ultra-thin wide angle progresses within the condition range.
The sixth lens L6 has an on-axis thickness d11, and satisfies the following relation: d11/TTL is more than or equal to 0.02 and less than or equal to 0.14, and ultra-thinning is facilitated.
The focal length of the seventh lens L7 is f7, and the following relation is satisfied: 2.00 ≦ f7/f ≦ -0.48, allowing better imaging quality and lower sensitivity of the system through reasonable distribution of optical power.
The curvature radius of the object side surface of the seventh lens L7 is R13, the curvature radius of the image side surface of the seventh lens L7 is R14, and the following relational expression is satisfied: -1.19 ≦ (R13+ R14)/(R13-R14) ≦ 0.09, and it is specified that the shape of the seventh lens L7 is advantageous for correcting the off-axis aberration and the like as the ultra-thin wide angle progresses within the condition range.
The seventh lens L7 has an on-axis thickness d13, and satisfies the following relationship: the following relation is satisfied: d13/TTL is more than or equal to 0.04 and less than or equal to 0.14, and ultra-thinning is facilitated.
In addition, in the imaging optical lens 10 provided in the present embodiment, the surface of each lens can be an aspheric surface, which is easy to be made into a shape other than a spherical surface, so as to obtain more control variables for reducing the aberration and further reducing the number of lenses used, thereby effectively reducing the total length of the imaging optical lens 10. In the present embodiment, both the object-side surface and the image-side surface of each lens are aspheric.
It is to be noted that since the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 have the structure and parameter relationships as described above, the image pickup optical lens 10 can reasonably distribute the power, interval, and shape of each lens, and thus correct various types of aberrations.
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 (total optical length) (axial distance from the object side surface of the 1 st lens L1 to the image plane) 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 ]
The meanings of the symbols in the above table are as follows.
R: the radius of curvature of the optical surface is the central radius of curvature in the case of a lens;
s1: an aperture;
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 object side of glass plate GF;
r16 radius of curvature of image side of glass plate GF;
d: the on-axis thickness of each lens or the on-axis distance between two adjacent lenses;
d0 on-axis distance from 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: the on-axis distance from the image-side surface of the fifth lens L5 to the object-side surface of the glass plate GF;
d 11: the on-axis thickness of the sixth lens L6;
d 12: the on-axis distance from the image-side surface of the sixth lens L6 to the object-side surface of the glass plate GF;
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 glass plate GF;
d 15: on-axis thickness of glass flat GF;
d 16: the axial distance from the image side surface of the glass flat GF to the image surface Si;
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: refractive index of d-line of glass flat GF;
vd is 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;
vg: abbe number of glass sheet GF.
[ TABLE 2 ]
In table 2, k is a conic coefficient, and a4, a6, A8, a10, a12, a14, a16, a18, a20 are aspherical 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 ]
| Number of points of inflection | Position of reverse curvature 1 | Position of |
Position of reverse curvature 3 | |
| |
0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| P2R2 | 1 | 1.305 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| P4R1 | 1 | 0.335 | 0 | 0 |
| |
2 | 0.365 | 1.385 | 0 |
| P5R1 | 1 | 0.325 | 0 | 0 |
| P5R2 | 3 | 0.315 | 1.535 | 1.715 |
| |
2 | 0.455 | 1.725 | 0 |
| |
2 | 0.405 | 2.275 | 0 |
| P7R1 | 1 | 1.415 | 0 | 0 |
| |
2 | 0.255 | 2.965 | 0 |
[ TABLE 4 ]
| Number of stagnation points | Location of stagnation 1 | |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| P4R1 | 1 | 0.555 |
| P4R2 | 1 | 0.605 |
| P5R1 | 1 | 0.515 |
| P5R2 | 1 | 0.495 |
| P6R1 | 1 | 0.715 |
| P6R2 | 1 | 0.595 |
| P7R1 | 1 | 3.145 |
| P7R2 | 1 | 0.455 |
Fig. 2 and 3 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 470nm, 510nm, 555nm, 610nm, 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 21 shown later shows values corresponding to the parameters defined in the conditional expressions, for each of the numerical values in the first, second, third, fourth, and fifth embodiments.
As shown in table 21, the first embodiment satisfies each conditional expression.
In the present embodiment, the imaging optical lens 10 has an entrance pupil diameter ENPD of 3.109mm, a full field height IH of 4.56mm, and a diagonal field angle FOV of 74.20 °, and thus has a large aperture, a slim size, and a wide angle, and has excellent optical characteristics with its on-axis and off-axis chromatic aberration sufficiently corrected.
The following is embodiment two:
fig. 5 is a schematic structural diagram of the image pickup optical lens 20 in the second embodiment, which is basically the same as the first embodiment, and the meanings of symbols in the following list are also the same as those in the first embodiment, so that the description of the same parts is omitted here, and only different points are listed 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 ]
[ TABLE 7 ]
[ TABLE 8 ]
| Number of stagnation points | Location of stagnation 1 | |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| P4R1 | 1 | 0.585 |
| P4R2 | 1 | 0.665 |
| |
0 | 0 |
| |
0 | 0 |
| P6R1 | 1 | 1.045 |
| P6R2 | 1 | 0.845 |
| |
0 | 0 |
| P7R2 | 1 | 0.785 |
Table 21 below also lists values corresponding to various parameters in embodiment two and parameters specified in the conditional expressions.
Fig. 6 and 7 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm passing through the imaging optical lens 20, respectively. 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. The field curvature S in fig. 8 is a field curvature in the sagittal direction, and T is a field curvature in the tangential direction.
In the present embodiment, the imaging optical lens 20 has an entrance pupil diameter ENPD of 3.054mm, a full-field image height IH of 4.56mm, and a diagonal field angle FOV of 74.80 °, and thus has a large aperture, a slim size, and a wide angle, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.
The following is the third embodiment:
fig. 9 is a schematic structural diagram of an imaging optical lens 30 in the third embodiment, which is basically the same as the first embodiment, and the meanings of symbols in the following list are also the same as those in the first embodiment, so that the description of the same parts is omitted here, and only different points are listed 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 ]
Tables 11 and 12 show the inflected point and stagnation point design data of each lens in the imaging optical lens 30.
[ TABLE 11 ]
[ TABLE 12 ]
| Number of stagnation points | Location of stagnation 1 | |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| P4R1 | 1 | 0.385 |
| P4R2 | 1 | 0.615 |
| |
0 | 0 |
| P5R2 | 1 | 0.255 |
| P6R1 | 1 | 0.915 |
| P6R2 | 1 | 0.725 |
| |
0 | 0 |
| P7R2 | 1 | 0.745 |
Table 21 below also lists values corresponding to various parameters in the third embodiment and the parameters specified in the conditional expressions.
Fig. 10 and 11 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm passing through the imaging optical lens 30, respectively. 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. The field curvature S in fig. 12 is a field curvature in the sagittal direction, and T is a field curvature in the tangential direction.
In the present embodiment, the imaging optical lens 30 has an entrance pupil diameter ENPD of 3.008mm, a full field image height IH of 4.56mm, and a diagonal field angle FOV of 75.72 °, and thus has a large aperture, a slim size, and a wide angle, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.
The following is embodiment four:
fig. 13 is a schematic structural diagram of an image pickup optical lens 40 in a fourth embodiment, which is basically the same as the first embodiment, and the meanings of symbols in the following list are also the same as those in the first embodiment, so that the same parts are not repeated herein, and only different points are listed below.
Tables 13 and 14 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention.
[ TABLE 13 ]
[ TABLE 14 ]
Tables 15 and 16 show the inflected point and stagnation point design data of each lens in the imaging optical lens 40.
[ TABLE 15 ]
| Number of points of inflection | Position of reverse curvature 1 | Position of |
Position of reverse curvature 3 | Position of reverse curve 4 | |
| |
0 | 0 | 0 | 0 | 0 |
| P1R2 | 1 | 1.325 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 | 0 |
| P4R1 | 1 | 0.255 | 0 | 0 | 0 |
| |
2 | 0.345 | 1.425 | 0 | 0 |
| |
2 | 0.325 | 1.575 | 0 | 0 |
| |
2 | 0.335 | 1.785 | 0 | 0 |
| |
2 | 0.625 | 1.965 | 0 | 0 |
| |
2 | 0.345 | 2.355 | 0 | 0 |
| P7R1 | 4 | 0.115 | 1.515 | 2.815 | 3.005 |
| |
2 | 0.555 | 3.485 | 0 | 0 |
[ TABLE 16 ]
| Number of stagnation points | Location of stagnation 1 | |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| |
0 | 0 |
| P4R1 | 1 | 0.425 |
| P4R2 | 1 | 0.585 |
| P5R1 | 1 | 0.585 |
| P5R2 | 1 | 0.615 |
| P6R1 | 1 | 1.065 |
| P6R2 | 1 | 0.625 |
| P7R1 | 1 | 0.185 |
| P7R2 | 1 | 1.145 |
Table 21 below also lists values corresponding to various parameters in the fourth embodiment and the parameters specified in the conditional expressions.
Fig. 14 and 15 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm passing through the imaging optical lens 40, respectively. Fig. 16 is a schematic view showing curvature of field and distortion of light having a wavelength of 555nm after passing through the imaging optical lens 40. The field curvature S in fig. 16 is a field curvature in the sagittal direction, and T is a field curvature in the tangential direction.
In the present embodiment, the imaging optical lens 40 has an entrance pupil diameter ENPD of 2.977mm, a full-field image height IH of 4.56mm, and a diagonal field angle FOV of 76.38 °, and thus has a large aperture, a slim size, and a wide angle, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.
The following is embodiment five:
fig. 17 is a schematic structural diagram of an image pickup optical lens 50 according to a fifth embodiment, which is substantially the same as the first embodiment, and the meanings of symbols in the following list are also the same as those in the first embodiment, so that the description of the same parts is omitted here, and only different points are listed below.
Tables 17 and 18 show design data of the imaging optical lens 50 according to the fifth embodiment of the present invention.
[ TABLE 17 ]
[ TABLE 18 ]
Tables 19 and 20 show the inflected point and stagnation point design data of each lens in the imaging optical lens 50.
[ TABLE 19 ]
| Number of points of inflection | Position of reverse curvature 1 | Position of |
|
| |
0 | 0 | 0 |
| P1R2 | 1 | 1.225 | 0 |
| |
0 | 0 | 0 |
| |
0 | 0 | 0 |
| |
2 | 0.755 | 1.155 |
| |
2 | 0.685 | 1.205 |
| |
0 | 0 | 0 |
| |
2 | 0.535 | 1.475 |
| P5R1 | 1 | 0.275 | 0 |
| P5R2 | 1 | 0.345 | 0 |
| P6R1 | 1 | 0.375 | 0 |
| |
2 | 1.445 | 2.155 |
| |
2 | 0.345 | 1.795 |
| |
2 | 0.675 | 3.495 |
[ TABLE 20 ]
Table 21 below also lists values corresponding to various parameters in the fifth embodiment and the parameters specified in the conditional expressions.
Fig. 18 and 19 are schematic diagrams showing axial aberrations and chromatic aberration of magnification of light having wavelengths of 470nm, 510nm, 555nm, 610nm, and 650nm passing through the imaging optical lens 50, respectively. Fig. 20 is a schematic view showing curvature of field and distortion of light having a wavelength of 555nm after passing through the imaging optical lens 50. The field curvature S in fig. 20 is a field curvature in the sagittal direction, and T is a field curvature in the tangential direction.
In the present embodiment, the imaging optical lens 50 has an entrance pupil diameter ENPD of 2.794mm, a full-field image height IH of 4.56mm, and a diagonal field angle FOV of 79.48 °, and thus has a large aperture, a slim size, and a wide angle, and its on-axis and off-axis chromatic aberration is sufficiently corrected, and has excellent optical characteristics.
The following table 21 is based on the above values and values of other relevant parameters.
[ TABLE 21 ]
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (9)
1. An imaging optical lens is characterized in that the imaging optical lens is composed of seven lenses, and the seven lenses sequentially comprise from an object side to an image side: a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with positive refractive power, a fourth lens element with negative refractive power, a fifth lens element with refractive power, a sixth lens element with positive refractive power, and a seventh lens element with negative refractive power;
the focal length of the whole imaging optical lens is f, the total optical length of the imaging optical lens is TTL, the image height of the imaging optical lens is IH, the focal length of the second lens is f2, the curvature radius of the object-side surface of the third lens is R5, and the curvature radius of the image-side surface of the third lens is R6, which satisfy the following relational expression:
0.85≤f/TTL≤1.02；
1.30≤TTL/IH≤1.40；
-3.00≤f2/f≤-1.50；
-10.00≤(R5+R6)/(R5-R6)≤-3.00。
2. an imaging optical lens according to claim 1, wherein the focal length of the fourth lens is f4, and the following relationship is satisfied:
-25.00≤f4/f≤-5.00。
3. the imaging optical lens according to claim 1, wherein the first lens has a focal length f1, a radius of curvature of the object-side surface of the first lens is R1, a radius of curvature of the image-side surface of the first lens is R2, and an on-axis thickness d1, and satisfies the following relationship:
0.37≤f1/f≤1.52；
-5.92≤(R1+R2)/(R1-R2)≤-1.01；
0.05≤d1/TTL≤0.18。
4. the imaging optical lens according to claim 1, wherein a radius of curvature of the object-side surface of the second lens is R3, a radius of curvature of the image-side surface of the second lens is R4, an on-axis thickness of the second lens is d3, and the following relationship is satisfied:
0.94≤(R3+R4)/(R3-R4)≤7.47；
0.02≤d3/TTL≤0.06。
5. the imaging optical lens according to claim 1, wherein the third lens has a focal length f3, an on-axis thickness d5, and satisfies the following relationship:
0.94≤f3/f≤5.21；
0.02≤d5/TTL≤0.10。
6. the imaging optical lens according to claim 1, wherein a radius of curvature of the object-side surface of the fourth lens is R7, a radius of curvature of the image-side surface of the fourth lens is R8, an on-axis thickness of the fourth lens is d7, and the following relationship is satisfied:
-0.73≤(R7+R8)/(R7-R8)≤28.23
0.02≤d7/TTL≤0.07。
7. the imaging optical lens according to claim 1, wherein the fifth lens has a focal length f5, a radius of curvature of an object-side surface of the fifth lens is R9, a radius of curvature of an image-side surface of the fifth lens is R10, an on-axis thickness of the fifth lens is d9, and the following relationship is satisfied:
-246.84≤f5/f≤21.72；
0.13≤(R9+R10)/(R9-R10)≤81.62；
0.02≤d9/TTL≤0.07。
8. the imaging optical lens according to claim 1, wherein the sixth lens has a focal length f6, a radius of curvature of an object-side surface of the sixth lens is R11, a radius of curvature of an image-side surface of the sixth lens is R12, an on-axis thickness of the sixth lens is d11, and the following relationship is satisfied:
0.49≤f6/f≤3.32；
-3.93≤(R11+R12)/(R11-R12)≤-0.99；
0.02≤d11/TTL≤0.14。
9. the imaging optical lens according to claim 1, wherein the seventh lens has a focal length f7, a radius of curvature of an object-side surface of the seventh lens is R13, a radius of curvature of an image-side surface of the seventh lens is R14, an on-axis thickness of the seventh lens is d13, and the following relationship is satisfied:
-2.00≤f7/f≤-0.48；
-1.19≤(R13+R14)/(R13-R14)≤0.09；
0.04≤d13/TTL≤0.14。
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| CN110780424B (en) | 2019-11-14 | 2022-10-04 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| WO2021127857A1 (en) * | 2019-12-23 | 2021-07-01 | 诚瑞光学(常州)股份有限公司 | Camera optical lens |
| JP6861319B1 (en) * | 2020-10-26 | 2021-04-21 | エーエーシー オプティックス ソリューションズ ピーティーイー リミテッド | Imaging lens |
| CN112230380B (en) * | 2020-10-30 | 2021-10-01 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112230379B (en) * | 2020-10-30 | 2022-08-05 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
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