CN110262007B - Image pickup optical lens - Google Patents
Image pickup optical lens Download PDFInfo
- Publication number
- CN110262007B CN110262007B CN201910581780.6A CN201910581780A CN110262007B CN 110262007 B CN110262007 B CN 110262007B CN 201910581780 A CN201910581780 A CN 201910581780A CN 110262007 B CN110262007 B CN 110262007B
- Authority
- CN
- China
- Prior art keywords
- lens
- image
- curvature
- optical
- ttl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention relates to the field of optical lenses, and discloses an image pickup optical lens, which sequentially comprises 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 negative refractive power, a fourth lens element with positive refractive power, a fifth lens element with negative refractive power, a sixth lens element with positive refractive power, and a seventh lens element with negative refractive power; the focal length of the image pickup optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the on-axis thickness of the fourth lens is d7, and the curvature radius of the object-side surface of the fourth lens is R7, which satisfies the following relation: f1/f is more than or equal to 0.80 and less than or equal to 1.00; f2 is less than or equal to 0.00 mm; f3/f2 is more than or equal to 0.00 and less than or equal to 1.00; r7/d7 is more than or equal to 12.00 and less than or equal to 20.00. The camera optical lens provided by the invention has good optical performance, and meets the design requirements of large aperture 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) Sensor, and due to the advanced semiconductor manufacturing process technology, the pixel size of the photosensitive devices is reduced, and in addition, the current electronic products are developed with a good function, a light weight, a small size and a light weight, 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 three-piece, four-piece, or even five-piece or six-piece lens structures. 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 pitch and the lens shape setting still have certain irrationality, so that the design requirements of large aperture, 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 design requirements for a large aperture and an ultra-thin structure.
To solve the above-mentioned problems, an embodiment of the present invention provides an imaging optical lens, in order from an object side to an image side, comprising: a first lens element with positive refractive power, a second lens element with negative refractive power, a third lens element with negative refractive power, a fourth lens element with positive refractive power, a fifth lens element with negative refractive power, a sixth lens element with positive refractive power, and a seventh lens element with negative refractive power;
the system focal length of the image pickup optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the on-axis thickness of the fourth lens is d7, and the curvature radius of the object-side surface of the fourth lens is R7, so that the following relational expressions are satisfied:
0.80≤f1/f≤1.00；
f2≤0.00mm；
0.00≤f3/f2≤1.00；
12.00≤R7/d7≤20.00。
preferably, the radius of curvature of the object-side surface of the second lens is R3, and the radius of curvature of the image-side surface of the second lens is R4, and the following relationships are satisfied:
-1.00≤(R3+R4)/(R3-R4)≤1.80。
preferably, the on-axis thickness of the third lens is d5, and the on-axis thickness from the image-side surface of the third lens to the object-side surface of the fourth lens is d6, and the following relations are satisfied:
1.65≤d6/d5≤1.85。
preferably, the curvature radius of the object-side surface of the first lens element is R1, the curvature radius of the image-side surface of the first lens element is R2, the on-axis thickness of the first lens element is d1, and the total optical length of the imaging optical lens system is TTL, and the following relationships are satisfied:
-2.67≤(R1+R2)/(R1-R2)≤-0.51；
0.06≤d1/TTL≤0.19。
preferably, the on-axis thickness of the second lens element is d3, and the total optical length of the image pickup optical lens is TTL, and the following relationship is satisfied:
-88.58≤f 2/f≤-2.04；
0.03≤d3/TTL≤0.09。
preferably, a curvature radius of an object-side surface of the third lens element is R5, a curvature radius of an image-side surface of the third lens element is R6, an on-axis thickness of the third lens element is d5, and an optical total length of the imaging optical lens system is TTL, and the following relationships are satisfied:
-5.95≤f3/f≤-1.80；
2.44≤(R5+R6)/(R5-R6)≤9.47；
0.02≤d5/TTL≤0.60。
preferably, the focal length of the fourth lens element is f4, the radius of curvature of the image-side surface of the fourth lens element is R8, and the total optical length of the image pickup optical lens system is TTL, and the following relationships are satisfied:
1.10≤f4/f≤3.51；
-0.49≤(R7+R8)/(R7-R8)≤0.15；
0.05≤d7/TTL≤0.19。
preferably, 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 image pickup optical lens system is TTL, and the following relationships are satisfied:
-5.35≤f5/f≤-1.61；
-10.20≤(R9+R10)/(R9-R10)≤-2.90；
0.03≤d9/TTL≤0.08。
preferably, the total optical length of the image pickup optical lens is TTL, and the image height of the image pickup optical lens is IH, and the following relationship is satisfied:
TTL/IH≤1.56。
preferably, the focal number of the imaging optical lens is Fno, and the following relationship is satisfied:
Fno≤1.7。
the invention has the advantages that the pick-up optical lens has good optical performance, large aperture 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 stop S1, the first lens element L1 with positive refractive power, the second lens element L2 with negative refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with positive refractive power, the fifth lens element L5 with negative refractive power, the sixth lens element L6 with positive refractive power, and the seventh lens element L7 with negative refractive power. An optical element such as an optical filter (filter) GF may be disposed between the seventh lens L7 and the image plane Si.
In the present embodiment, the system focal length of the imaging optical lens is defined as f, and the focal length of the first lens is defined as f1, and the following relational expression is satisfied: f1/f is more than or equal to 0.80 and less than or equal to 1.00; the ratio of the focal length f1 of the first lens L1 to the system focal length f is specified, which contributes to the improvement of the optical system performance within the conditional expression range.
Defining the focal length of the second lens L2 as f2, the following relation is satisfied: f2 is less than or equal to 0.00 mm. The focal length range of the second lens L2 is specified, which is beneficial to system aberration correction and imaging quality improvement, and is beneficial to realizing ultra-thinning within the condition range.
Defining the focal length of the second lens L2 as f2, and the focal length of the third lens L3 as f3, the following relations are satisfied: f3/f2 is more than or equal to 0.00 and less than or equal to 1.00; when f3/f2 satisfies the condition, the focal powers of the second lens L2 and the third lens L3 can be effectively distributed to correct the aberration of the optical system, thereby improving the imaging quality.
Defining the on-axis thickness of the fourth lens L4 as d7, the radius of curvature of the object-side surface of the fourth lens L4 as R7, the following relation is satisfied: r7/d7 is more than or equal to 12.00 and less than or equal to 20.00. When the R7/d7 meets the condition, the deflection degree of the light rays passing through the lens can be relieved, and the aberration can be effectively reduced.
The curvature radius of the object side surface of the second lens L2 is defined as R3, and the curvature radius of the image side surface of the second lens L2 is defined as R4, and the following relations are satisfied: -1.00 ≦ (R3+ R4)/(R3-R4) ≦ 1.80, defining the shape of the second lens L2, facilitating lens molding.
An on-axis thickness of the third lens L3 is defined as d5, and an on-axis thickness of an image-side surface of the third lens L3 to an object-side surface of the fourth lens L4 is defined as d6, and the following relationships are satisfied: 1.65 < d6/d5 < 1.85, and the ratio of the air space distance between the third lens L3 and the fourth lens L4 to the core thickness of the third lens L3 is regulated, so that the processing of the lens and the assembly of the lens are facilitated within the conditional expression range.
The curvature radius of the object side surface of the first lens is defined as R1, the curvature radius of the image side surface of the first lens is defined as R2, and the following relational expression is satisfied: 2.67 ≦ (R1+ R2)/(R1-R2) ≦ -0.51, and the shape of the first lens L1 is controlled appropriately so that the first lens L1 can correct the system spherical aberration effectively.
The on-axis thickness of the first lens L1 is defined as d1, and the total optical length of the image pickup optical lens 10 is defined as TTL, and the following relations are satisfied: d1/TTL is more than or equal to 0.06 and less than or equal to 0.19, and ultra-thinning is facilitated.
Defining the focal length of the second lens L2 as f2, the following relation is satisfied: 88.58 f 2/f 2.04, which is advantageous for correcting the aberration of the optical system by controlling the negative power of the second lens L2 in a reasonable range.
The on-axis thickness of the second lens L2 is defined as d3, and the total optical length of the image pickup optical lens 10 is defined as TTL, and the following relations are satisfied: d3/TTL is more than or equal to 0.03 and less than or equal to 0.09, and ultra-thinning is facilitated.
The focal length of the third lens L3 is defined as f3, and the following relation is satisfied: -5.95 ≦ f3/f ≦ -1.80, 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 third lens L3 is defined as R5, the curvature radius of the image side surface of the third lens L3 is defined as R6, and the following relational expressions are satisfied: 2.44 ≦ (R5+ R6)/(R5-R6) 9.47, can effectively control the shape of the third lens L3, is beneficial to molding the third lens L3, and avoids poor molding and stress generation caused by overlarge surface curvature of the third lens L3.
Defining the on-axis thickness of the third lens as d5, and the total optical length of the image pickup optical lens as TTL, and satisfying the following relations: d5/TTL is more than or equal to 0.02 and less than or equal to 0.60, and ultra-thinning is facilitated.
Defining the focal length of the fourth lens L4 as f4, the following relation is satisfied: f4/f is more than or equal to 1.10 and less than or equal to 3.51, the ratio of the focal length of the fourth lens L4 to the focal length f of the system is specified, 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 fourth lens L4 is defined as R7, and the curvature radius of the image side surface of the fourth lens L4 is defined as R8, and the following relations are satisfied: -0.49 ≤ (R7+ R8)/(R7-R8) 0.15. The shape of the fourth lens L4 is defined, and when the shape is within the range, it is advantageous to correct the problem such as the aberration of the off-axis view angle with the progress of ultra-thinning and wide-angle.
Defining the on-axis thickness of the fourth lens L4 as d7, and the total optical length of the image pickup optical lens as TTL, and satisfying the following relations: d7/TTL is more than or equal to 0.05 and less than or equal to 0.19, and ultra-thinning is facilitated.
Defining the focal length of the fifth lens L5 as f5, the following relation is satisfied: f5/f is more than or equal to-5.35 and less than or equal to-1.61. The definition of the fifth lens L5 can effectively make the light ray angle of the camera lens smooth, and reduce tolerance sensitivity.
The radius of curvature of the object-side surface of the fifth lens element is R9, and the radius of curvature of the image-side surface of the fifth lens element is R10, and the following relationships are satisfied: the ratio of (R9+ R10)/(R9-R10) is not more than-10.20 and not more than-2.90. The shape of the fifth lens L5 is defined, and when the shape is within the range, it is advantageous to correct the problem such as the aberration of the off-axis view angle with the progress of ultra-thinning and wide-angle.
The total optical length of the image pickup optical lens 10 is defined as TTL, and satisfies the following relation: d9/TTL is more than or equal to 0.03 and less than or equal to 0.08, and ultra-thinning is facilitated.
In this embodiment, the total optical length TTL of the image pickup optical lens 10 is less than or equal to 5.94 mm, which is beneficial to achieving ultra-thinning.
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.
Further, TTL is the total optical length of the image pickup optical lens 10, and IH is the image height of the image pickup optical lens 10, and the following relationships are satisfied: TTL/IH is less than or equal to 1.56, and ultra-thinning is facilitated; fno is the focal number, i.e. the ratio of the effective focal length to the entrance pupil aperture, and satisfies the following relation: fno is less than or equal to 1.7, which is beneficial to realizing a large aperture and ensures good imaging performance; the angle of view is Fov, and the following relation is satisfied: fov is more than or equal to 77 degrees, which is beneficial to realizing wide angle. That is, when the above relationship is satisfied, the imaging optical lens 10 can satisfy the design requirements of large aperture and ultra-thinness while having good optical imaging performance; in accordance with the characteristics of the optical lens 10, the optical lens 10 is particularly suitable for a mobile phone camera lens module and a WEB camera lens which are configured by image pickup devices such as a high-pixel CCD and 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) in units of 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;
vd: 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;
vg: 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 | Location of stagnation 3 | |
| |
0 | 0 | 0 | 0 |
| P1R2 | 2 | 0.565 | 1.245 | 0 |
| |
0 | 0 | 0 | 0 |
| |
1 | 0.835 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
1 | 0.735 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
1 | 1.205 | 0 | 0 |
| |
1 | 1.355 | 0 | 0 |
| P7R1 | 3 | 0.575 | 2.245 | 2.925 |
| |
1 | 1.275 | 0 | 0 |
Fig. 2 shows a schematic diagram of axial aberrations of light having wavelengths of 656nm, 588nm, 546nm, 486nm, and 436nm after passing through the imaging optical lens 10 of the first embodiment, and fig. 3 shows a schematic diagram of chromatic aberration of magnification of light having wavelengths of 656nm, 588nm, 546nm, 486nm, and 436nm after passing through the imaging optical lens 10 of the first embodiment. Fig. 4 is a schematic view showing the field curvature and distortion of light having a wavelength of 546nm after passing through the imaging optical lens 10 according to the first embodiment, where the field curvature S in fig. 4 is the field curvature in the sagittal direction, and T is the field curvature in the tangential direction.
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 2.567mm, a full field height of 3.475mm, and a diagonal field angle of 77.60 °, and has excellent optical characteristics, with a wide angle and a slim profile, and with a sufficient correction of 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 ]
[ TABLE 8 ]
| Number of stagnation points | Location of |
Location of stagnation 2 | Location of stagnation 3 | |
| |
0 | 0 | 0 | 0 |
| |
1 | 0.105 | 0 | 0 |
| |
1 | 0.685 | 0 | 0 |
| |
1 | 1.015 | 0 | 0 |
| P3R1 | 2 | 1.005 | 1.135 | 0 |
| |
0 | 0 | 0 | 0 |
| |
1 | 0.905 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| P5R1 | 2 | 1.405 | 1.555 | 0 |
| |
1 | 1.445 | 0 | 0 |
| |
1 | 1.105 | 0 | 0 |
| |
1 | 1.125 | 0 | 0 |
| P7R1 | 3 | 0.425 | 2.455 | 2.555 |
| |
1 | 1.125 | 0 | 0 |
Fig. 6 shows a schematic diagram of axial aberrations of light with wavelengths of 436nm, 486nm, 546nm, 588nm and 656nm after passing through the imaging optical lens 20 of the second embodiment, and fig. 7 shows a schematic diagram of chromatic aberration of magnification of light with wavelengths of 436nm, 486nm, 546nm, 588nm and 656nm after passing through the imaging optical lens 20 of the second embodiment. Fig. 8 is a schematic view showing curvature of field and distortion of light having a wavelength of 546nm after passing through the imaging optical lens 20 according to the second embodiment.
As shown in table 13, the second embodiment satisfies each conditional expression.
In the present embodiment, the imaging optical lens 20 has an entrance pupil diameter of 2.582mm, a full field height of 3.475mm, and a diagonal field angle of 77.10 °, and has excellent optical characteristics, in which the angle of view is widened and reduced in thickness, and the on-axis and off-axis chromatic aberration is sufficiently corrected.
(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 |
Location of stagnation 2 | Location of stagnation 3 | |
| |
0 | 0 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| |
1 | 0.775 | 0 | 0 |
| |
1 | 0.945 | 0 | 0 |
| P3R1 | 2 | 1.025 | 1.105 | 0 |
| |
0 | 0 | 0 | 0 |
| |
1 | 0.825 | 0 | 0 |
| |
0 | 0 | 0 | 0 |
| P5R1 | 2 | 1.425 | 1.535 | 0 |
| |
1 | 1.465 | 0 | 0 |
| |
1 | 1.095 | 0 | 0 |
| |
1 | 1.115 | 0 | 0 |
| P7R1 | 3 | 0.435 | 2.465 | 2.565 |
| |
1 | 1.145 | 0 | 0 |
Fig. 10 shows a schematic diagram of axial aberration of light with wavelengths of 436nm, 486nm, 546nm, 588nm, and 656nm after passing through the imaging optical lens 30 of the third embodiment, and fig. 11 shows a schematic diagram of chromatic aberration of magnification of light with wavelengths of 436nm, 486nm, 546nm, 588nm, and 656nm after passing through the imaging optical lens 30 of the third embodiment. Fig. 12 is a schematic view showing curvature of field and distortion of light having a wavelength of 546nm 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 system of the present embodiment satisfies the above conditional expressions.
In the present embodiment, the imaging optical lens 30 has an entrance pupil diameter of 2.590mm, a full field image height of 3.475mm, and a diagonal field angle of 77.00 °, and has excellent optical characteristics, with a wide angle and a slim size, and with a sufficient correction of on-axis and off-axis chromatic aberration.
[ TABLE 13 ]
| Parameter and condition | Embodiment mode | 1 | Embodiment mode 2 | Embodiment 3 |
| f | 4.260 | 4.286 | 4.300 | |
| f1 | 4.241 | 3.882 | 3.464 | |
| f2 | -188.679 | -22.812 | -13.182 | |
| f3 | -11.531 | -12.101 | -12.786 | |
| f4 | 9.683 | 9.463 | 10.050 | |
| f5 | -11.387 | -10.357 | -10.716 | |
| f6 | 8.543 | 6.285 | 6.494 | |
| f7 | -6.039 | -4.500 | -4.509 | |
| f12 | 4.320 | 4.546 | 4.492 | |
| f1/f | 1.00 | 0.91 | 0.81 | |
| f3/f2 | 0.06 | 0.53 | 0.97 | |
| R7/d7 | 19.70 | 12.20 | 17.35 | |
| Fno | 1.66 | 1.66 | 1.66 |
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 (9)
1. An imaging optical lens, comprising seven lens elements 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 negative refractive power, a fourth lens element with positive refractive power, a fifth lens element with negative refractive power, a sixth lens element with positive refractive power, and a seventh lens element with negative refractive power;
the system focal length of the image pickup optical lens is f, the focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the on-axis thickness of the fourth lens is d7, the curvature radius of the object-side surface of the fourth lens is R7, the curvature radius of the object-side surface of the second lens is R3, and the curvature radius of the image-side surface of the second lens is R4, and the following relations are satisfied:
0.80≤f1/f≤1.00；
0.00≤f3/f2≤1.00；
12.00≤R7/d7≤20.00；
-1.00≤(R3+R4)/(R3-R4)≤1.80。
2. the imaging optical lens according to claim 1, wherein an on-axis thickness of the third lens is d5, and an on-axis thickness of an image-side surface of the third lens to an object-side surface of the fourth lens is d6, and the following relational expressions are satisfied:
1.65≤d6/d5≤1.85。
3. the image-capturing optical lens of claim 1, wherein 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, the on-axis thickness of the first lens is d1, and the total optical length of the image-capturing optical lens is TTL, and the following relationships are satisfied:
-2.67≤(R1+R2)/(R1-R2)≤-0.51；
0.06≤d1/TTL≤0.19。
4. a photographic optical lens according to claim 1, characterized in that the on-axis thickness of the second lens is d3, and the total optical length of the photographic optical lens is TTL, and the following relation is satisfied:
-88.58≤f 2/f≤-2.04；
0.03≤d3/TTL≤0.09。
5. the imaging optical lens of claim 1, wherein a radius of curvature of an object-side surface of the third lens is R5, a radius of curvature of an image-side surface of the third lens is R6, an on-axis thickness of the third lens is d5, and an optical total length of the imaging optical lens is TTL, and the following relationship is satisfied:
-5.95≤f3/f≤-1.80；
2.44≤(R5+R6)/(R5-R6)≤9.47；
0.02≤d5/TTL≤0.60。
6. the imaging optical lens of claim 1, wherein the focal length of the fourth lens element is f4, the radius of curvature of the image side surface of the fourth lens element is R8, and the total optical length of the imaging optical lens is TTL, and the following relationships are satisfied:
1.10≤f4/f≤3.51；
-0.49≤(R7+R8)/(R7-R8)≤0.15；
0.05≤d7/TTL≤0.19。
7. the image-taking optical lens according to claim 1, wherein the focal length of the fifth lens element is f5, the radius of curvature of the object-side surface of the fifth lens element is R9, the radius of curvature 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 image-taking optical lens is TTL, and the following relationship is satisfied:
-5.35≤f5/f≤-1.61；
-10.20≤(R9+R10)/(R9-R10)≤-2.90；
0.03≤d9/TTL≤0.08。
8. a camera optical lens according to claim 1, wherein the total optical length of the camera optical lens is TTL, and the image height of the camera optical lens is IH, and the following relationship is satisfied:
TTL/IH≤1.56。
9. an image-pickup optical lens according to claim 1, wherein the focal number of the image-pickup optical lens is Fno and satisfies the following relationship:
Fno≤1.7。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910581780.6A CN110262007B (en) | 2019-06-30 | 2019-06-30 | Image pickup optical lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910581780.6A CN110262007B (en) | 2019-06-30 | 2019-06-30 | Image pickup optical lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110262007A CN110262007A (en) | 2019-09-20 |
| CN110262007B true CN110262007B (en) | 2021-07-30 |
Family
ID=67923308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910581780.6A Active CN110262007B (en) | 2019-06-30 | 2019-06-30 | Image pickup optical lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110262007B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673308A (en) | 2019-11-05 | 2020-01-10 | 浙江舜宇光学有限公司 | Optical imaging system |
| WO2021109077A1 (en) * | 2019-12-05 | 2021-06-10 | 诚瑞光学(常州)股份有限公司 | Camera optical lens |
| CN110908075B (en) * | 2019-12-05 | 2020-10-30 | 瑞声通讯科技(常州)有限公司 | Image pickup optical lens |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63155113A (en) * | 1986-12-19 | 1988-06-28 | Asahi Optical Co Ltd | Zoom lens for compact camera |
| CN208737089U (en) * | 2018-08-22 | 2019-04-12 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN109828361A (en) * | 2018-12-31 | 2019-05-31 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| CN109839719A (en) * | 2018-12-27 | 2019-06-04 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
-
2019
- 2019-06-30 CN CN201910581780.6A patent/CN110262007B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63155113A (en) * | 1986-12-19 | 1988-06-28 | Asahi Optical Co Ltd | Zoom lens for compact camera |
| CN208737089U (en) * | 2018-08-22 | 2019-04-12 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN109839719A (en) * | 2018-12-27 | 2019-06-04 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| CN109828361A (en) * | 2018-12-31 | 2019-05-31 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110262007A (en) | 2019-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110297314B (en) | Image pickup optical lens | |
| CN110297312B (en) | Image pickup optical lens | |
| CN111025533B (en) | Image pickup optical lens | |
| CN110596869B (en) | Image pickup optical lens | |
| CN110333590B (en) | Image pickup optical lens | |
| CN111077643B (en) | Image pickup optical lens | |
| CN110412737B (en) | Image pickup optical lens | |
| CN110221410B (en) | Image pickup optical lens | |
| CN110398822B (en) | Image pickup optical lens | |
| CN111061039B (en) | Image pickup optical lens | |
| CN110361840B (en) | Image pickup optical lens | |
| CN112230372B (en) | Image pickup optical lens | |
| CN111025534B (en) | Image pickup optical lens | |
| CN110221411B (en) | Image pickup optical lens | |
| CN110398821B (en) | Image pickup optical lens | |
| CN110262007B (en) | Image pickup optical lens | |
| CN110262008B (en) | Image pickup optical lens | |
| CN110398818B (en) | Image pickup optical lens | |
| CN110297316B (en) | Image pickup optical lens | |
| CN111025541B (en) | Image pickup optical lens | |
| CN111061035B (en) | Image pickup optical lens | |
| CN111025552B (en) | Image pickup optical lens | |
| CN111025551B (en) | Image pickup optical lens | |
| CN110398820B (en) | Image pickup optical lens | |
| CN110262009B (en) | Image pickup optical lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200423 Address after: No. 8, 2 floor, 85 Cavendish Science Park Avenue, Singapore Applicant after: Raytheon solutions Pte Ltd Address before: No. 8, 2 floor, 85 Cavendish Science Park Avenue, Singapore Applicant before: Raytheon Technology (Singapore) Co., Ltd |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |