CN111007655A - Image pickup optical lens - Google Patents
Image pickup optical lens Download PDFInfo
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- CN111007655A CN111007655A CN201911395078.7A CN201911395078A CN111007655A CN 111007655 A CN111007655 A CN 111007655A CN 201911395078 A CN201911395078 A CN 201911395078A CN 111007655 A CN111007655 A CN 111007655A
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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
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: the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens; at least one of the first lens to the fifth lens includes a free-form surface, a focal length of the image pickup optical lens is f, a focal length of the first lens is f1, a focal length of the third lens is f3, and a focal length of the fourth lens is f4, and the following relationships are satisfied: f1/f is more than or equal to 2.00 and less than or equal to 6.00; f3/f4 is more than or equal to-5.50 and less than or equal to-1.00. The camera optical lens provided by the invention has good optical performance while being ultrathin and wide-angle, and simultaneously, because at least one lens comprises a free-form surface, the aberration can be effectively corrected, and the performance of an optical system is further improved.
Description
Technical Field
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
With the development of imaging lenses, people have higher and higher imaging requirements on the lenses, and night scene shooting and background blurring of the lenses also become important indexes for measuring the imaging standards of the lenses. At present, rotationally symmetrical aspheric surfaces are mostly adopted, and the aspheric surfaces only have sufficient freedom degree in a meridian plane and cannot well correct off-axis aberration. The free-form surface is a non-rotational symmetric surface type, so that aberration can be well balanced, imaging quality is improved, and the processing of the free-form surface is gradually mature. With the improvement of the requirements on lens imaging, the addition of the free-form surface is very important when the lens is designed, and the effect is more obvious particularly in the design of wide-angle and ultra-wide-angle lenses.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an imaging optical lens which has excellent optical performance while being ultra-thin and wide-angle, and at least one lens includes a free-form surface, so that aberration can be effectively corrected, and the performance of the optical system can be further improved.
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: the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens;
at least one of the first lens to the fifth lens includes a free-form surface, a focal length of the image pickup optical lens is f, a focal length of the first lens is f1, a focal length of the third lens is f3, and a focal length of the fourth lens is f4, and the following relationships are satisfied:
2.00≤f1/f≤6.00；
-5.50≤f3/f4≤-1.00。
preferably, the on-axis thickness of the second lens is d3, the on-axis distance from the image-side surface of the second lens to the object-side surface of the third lens is d4, and the following relation is satisfied:
2.00≤d3/d4≤8.00。
preferably, the on-axis thickness of the fourth lens is d7, the on-axis distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens is d8, and the following relation is satisfied:
2.20≤d7/d8≤21.00。
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 satisfies the following relationship:
-6.47≤(R1+R2)/(R1-R2)≤8.76；
0.03≤d1/TTL≤0.13。
preferably, the focal length of the second lens element is f2, the curvature radius of the object-side surface of the second lens element is R3, the curvature radius of the image-side surface of the second lens element is R4, the on-axis thickness of the second lens element is d3, the total optical length of the image pickup optical lens is TTL, and the following relationships are satisfied:
0.65≤f2/f≤2.18；
0.23≤(R3+R4)/(R3-R4)≤1.97；
0.04≤d3/TTL≤0.19。
preferably, the curvature radius of the object-side surface of the third lens element is R5, the curvature radius of the image-side surface of the third lens element is R6, the on-axis thickness of the third lens element is d5, and the total optical length of the imaging optical lens system is TTL and satisfies the following relationship:
-7.59≤f3/f≤-1.21；
-4.61≤(R5+R6)/(R5-R6)≤2.09；
0.02≤d5/TTL≤0.09。
preferably, a curvature radius of an object-side surface of the fourth lens element is R7, a curvature radius of an image-side surface of the fourth lens element is R8, an on-axis thickness of the fourth lens element is d7, and an optical total length of the imaging optical lens system is TTL and satisfies the following relationship:
0.25≤f4/f≤3.18；
0.66≤(R7+R8)/(R7-R8)≤8.68；
0.05≤d7/TTL≤0.31。
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, the total optical length of the image pickup optical lens is TTL, and the following relationships are satisfied:
-98.44≤f5/f≤-0.38；
0.70≤(R9+R10)/(R9-R10)≤12.48；
0.05≤d9/TTL≤0.19。
preferably, the F-number of the imaging optical lens is Fno, and the following relationship is satisfied:
Fno≤2.49。
preferably, the total optical length of the image pickup optical lens is TTL, the full field of view height of a diagonal line of the image pickup optical lens is IH, and the following relationship is satisfied:
TTL/IH≤0.88。
the invention has the beneficial effects that: the pick-up optical lens has good optical performance while being ultra-thin and wide-angle, and simultaneously, because at least one lens comprises a free-form surface, the aberration can be effectively corrected, the performance of an optical system is further improved, and the pick-up optical lens is particularly suitable for a mobile phone pick-up lens assembly and a WEB pick-up lens which are composed of pick-up elements such as CCD (charge coupled device), CMOS (complementary metal oxide semiconductor) and the like for high pixels.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be 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 of the present invention;
FIG. 2 is a diagram of the imaging optics of FIG. 1 with the RMS spot diameter in the first quadrant;
fig. 3 is a schematic configuration diagram of an imaging optical lens according to a second embodiment of the present invention;
FIG. 4 is a diagram of the imaging optics of FIG. 3 with the RMS spot diameter in the first quadrant;
fig. 5 is a schematic configuration diagram of an imaging optical lens according to a third embodiment of the present invention;
FIG. 6 is a plot of the RMS spot diameter for the imaging optics lens of FIG. 5 in the first quadrant;
fig. 7 is a schematic configuration diagram of an imaging optical lens according to a fourth embodiment of the present invention;
FIG. 8 is a plot of the RMS spot diameter for the imaging optics lens of FIG. 7 in the first quadrant;
fig. 9 is a schematic configuration diagram of an imaging optical lens according to a fifth embodiment of the present invention;
fig. 10 is a view of the imaging optical lens of fig. 9 with the RMS spot diameter in the first quadrant;
fig. 11 is a schematic configuration diagram of an imaging optical lens according to a sixth embodiment of the present invention;
fig. 12 is a case where the RMS spot diameter of the imaging optical lens shown in fig. 11 is in the first quadrant.
Detailed Description
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 imaging optical lens 10 according to a first embodiment of the present invention, and the imaging optical lens 10 includes five lenses. Specifically, the imaging optical lens 10, in order from an object side to an image side, includes: the lens comprises a first lens L1, a diaphragm S1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5. An optical element such as an optical filter (filter) GF may be disposed between the fifth lens L5 and the image plane Si.
The first lens element L1 has positive refractive power; the second lens element L2 with positive refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with positive refractive power and the fifth lens element L5 with negative refractive power.
The first lens L1 to the fifth lens L5 are all made of plastic. By rationalizing the material of the lens, the lens has good optical performance while being ultra-thin and wide-angle.
In this embodiment, at least one of the first lens L1 to the fifth lens L5 is defined to include a free-form surface, which contributes to correction of aberrations such as astigmatism, curvature of field, and distortion of the wide-angle optical system, thereby improving the performance of the optical system.
Defining the focal length of the image pickup optical lens 10 as f, the focal length of the first lens L1 as f1, and satisfying the following relation: f1/f is more than or equal to 2.00 and less than or equal to 6.00, the ratio of the focal length of the first lens L1 to the total focal length is specified, and the spherical aberration and the curvature of field of the system can be effectively balanced within the conditional expression range. Preferably, 2.09. ltoreq. f 1/f. ltoreq.5.86 is satisfied.
Defining the focal length of the third lens L3 as f3 and the focal length of the fourth lens L4 as f4, the following relations are satisfied: -5.50 ≦ f3/f4 ≦ -1.00, which specifies the ratio of the focal length of the third lens L3 to the focal length of the fourth lens L4, which, by a reasonable distribution of focal lengths, leads to a system with better imaging quality and lower sensitivity. Preferably, it satisfies-5.43. ltoreq. f3/f 4. ltoreq. 1.02.
When the above conditional expressions are satisfied, the imaging optical lens 10 can be made to have excellent optical performance while being ultra-thin and wide-angle.
Defining the on-axis thickness of the second lens L2 as d3, and the on-axis distance from the image-side surface of the second lens L2 to the object-side surface of the third lens L3 as d4, the following relationships are satisfied: 2.00 < d3/d4 < 8.00, and the ratio of the on-axis thickness d3 of the second lens L2 to the on-axis distance d4 from the image side surface of the second lens L2 to the object side surface of the third lens L3 is defined, so that the lens processing and assembling are facilitated within the conditional expression range. Preferably, 2.19. ltoreq. d3/d 4. ltoreq.7.80.
Defining the on-axis thickness of the fourth lens L4 as d7, and the on-axis distance from the image-side surface of the fourth lens L4 to the object-side surface of the fifth lens L5 as d8, the following relationships are satisfied: 2.20 < d7/d8 < 21.00, and the ratio of the on-axis thickness d7 of the fourth lens L4 to the on-axis distance d8 from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5 is defined, so that the total optical length can be compressed and the effect of making the lens thinner can be realized within the conditional expression range. Preferably, 2.21. ltoreq. d7/d 8. ltoreq.20.82 is satisfied.
The curvature radius of the object side surface of the first lens L1 is defined as R1, the curvature radius of the image side surface of the first lens L1 is defined as R2, and the following relational expressions are satisfied: 6.47 ≦ (R1+ R2)/(R1-R2) ≦ 8.76, 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, it satisfies-4.05 ≦ (R1+ R2)/(R1-R2). ltoreq.7.01.
Defining the on-axis thickness of the first lens L1 as d1, the total optical length of the image pickup optical lens 10 as TTL, and satisfying the following relation: d1/TTL is more than or equal to 0.03 and less than or equal to 0.13, and ultra-thinning is facilitated. Preferably, 0.05. ltoreq. d 1/TTL. ltoreq.0.10 is satisfied.
The focal length of the second lens L2 is f2, and the focal length of the imaging optical lens system 10 is f, which satisfy the following relations: f2/f is more than or equal to 0.65 and less than or equal to 2.18, and the aberration of the optical system is favorably corrected by controlling the focal power of the second lens L2 in a reasonable range. Preferably, 1.04. ltoreq. f 2/f. ltoreq.1.75 is satisfied.
The curvature radius of the 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 shape of the second lens L2 is defined to be 0.23 ≦ (R3+ R4)/(R3-R4) ≦ 1.97, and when the conditional expression is in this range, it is advantageous to correct the problem of chromatic aberration on the axis as the lens is made to have a very thin and wide angle. Preferably, 0.38. ltoreq. (R3+ R4)/(R3-R4). ltoreq.1.57 is satisfied.
The on-axis thickness of the second lens L2 is d3, the total optical length of the imaging optical lens system 10 is TTL, and the following relationship is satisfied: d3/TTL is more than or equal to 0.04 and less than or equal to 0.19, and ultra-thinning is facilitated. Preferably, 0.06. ltoreq. d 3/TTL. ltoreq.0.15 is satisfied.
The focal length of the third lens L3 is f3, and the focal length of the imaging optical lens system 10 is f, which satisfy the following relations: 7.59 ≦ f3/f ≦ -1.21, allowing better imaging quality and lower sensitivity of the system through reasonable distribution of optical power. Preferably, it satisfies-4.75. ltoreq. f 3/f. ltoreq-1.51.
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 relational expression is satisfied: 4.61 ≦ (R5+ R6)/(R5-R6) ≦ 2.09, and defines the shape of the third lens L3, and when within the range defined by the conditional expression, the degree of deflection of the light rays passing through the lens can be alleviated, and the aberration can be effectively reduced. Preferably, it satisfies-2.88 ≦ (R5+ R6)/(R5-R6). ltoreq.1.67.
The on-axis thickness of the third lens L3 is d5, the total optical length of the imaging optical lens system 10 is TTL, and the following relationship is satisfied: d5/TTL is more than or equal to 0.02 and less than or equal to 0.09, and ultra-thinning is facilitated. Preferably, 0.04. ltoreq. d 5/TTL. ltoreq.0.07 is satisfied.
The focal length of the fourth lens element L4 is f4, and the focal length of the imaging optical lens system 10 is f, which satisfy the following relations: f4/f is more than or equal to 0.25 and less than or equal to 3.18, the ratio of the focal length of the fourth lens L4 to the focal length of the system is regulated, and the performance of the optical system is improved when the ratio is within the conditional expression range. Preferably, 0.41. ltoreq. f 4/f. ltoreq.2.55 is satisfied.
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: the shape of the fourth lens element L4 is defined to be not less than 0.66 (R7+ R8)/(R7-R8) and not more than 8.68, and when the shape is within the range of the conditional expression, it is advantageous to correct the aberration of the off-axis angle and the like as the angle of super-thinness and wide angle of view progresses. Preferably, 1.06 ≦ (R7+ R8)/(R7-R8) ≦ 6.94.
The on-axis thickness of the fourth lens L4 is d7, the total optical length of the imaging optical lens system 10 is TTL, and the following relationship is satisfied: d7/TTL is more than or equal to 0.05 and less than or equal to 0.31, and ultra-thinning is facilitated. Preferably, 0.09. ltoreq. d 7/TTL. ltoreq.0.25 is satisfied.
The focal length of the fifth lens L5 is f5, and the focal length of the imaging optical lens system 10 is f, which satisfy the following relations: 98.44 ≦ f5/f ≦ -0.38, and the ratio of the focal length of the fifth lens L5 to the total focal length is specified, which contributes to reduction of aberration and improvement of image quality within this conditional expression range. Preferably, it satisfies-61.53. ltoreq. f 5/f. ltoreq-0.48.
The curvature radius of the object side surface of the fifth lens L5 is defined as R9, the curvature radius of the image side surface of the fifth lens L5 is defined as R10, and the following relational expressions are satisfied: 0.70 ≦ (R9+ R10)/(R9-R10) ≦ 12.48, and the shape of the fifth lens L5 is defined, and within this conditional expression, it contributes to improvement of the imaging quality. Preferably, 1.12 ≦ (R9+ R10)/(R9-R10) ≦ 9.98.
Defining the on-axis thickness of the fifth lens L5 as d9, the total optical length of the imaging optical lens system 10 as TTL, and satisfying the following relation: d9/TTL is more than or equal to 0.05 and less than or equal to 0.19, and ultra-thinning is facilitated. Preferably, 0.07. ltoreq. d 9/TTL. ltoreq.0.15 is satisfied.
The F-number of the imaging optical lens 10 is defined as Fno, and the following relation is satisfied: fno is less than or equal to 2.49, large aperture and good imaging performance. Preferably, Fno ≦ 2.44 is satisfied.
The full-field image height of the diagonal line of the imaging optical lens 10 is IH, and satisfies the following relation: TTL/IH is less than or equal to 0.88. Preferably, TTL/IH ≦ 0.84 is satisfied.
In this embodiment, the total optical length TTL of the image pickup optical lens 10 is less than or equal to 5.02 mm, which is beneficial to achieving ultra-thinning. Preferably, the total optical length TTL is less than or equal to 4.79 mm.
When the above relationship is satisfied, the image pickup optical lens 10 has good optical performance, and the free-form surface is adopted, so that the matching of the designed image surface area and the actual use area can be realized, and the image quality of the effective area is improved to the maximum extent; 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 units of focal length, on-axis distance, radius of curvature, on-axis thickness are 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;
tables 1 and 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention. The object-side surface and the image-side surface of the first lens L1 are free-form surfaces.
[ 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: radius of curvature of the object side of the optical filter GF;
r12: the radius of curvature of the image-side surface of the optical filter GF;
d: on-axis thickness of the lenses and 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: on-axis thickness of the optical filter GF;
d 12: 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;
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;
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 ]
Where k is a conic coefficient, a4, a6, A8, a10, a12, a14, a16, a18, and a20 are aspheric coefficients, r is a perpendicular distance between a point on an aspheric curve and an optical axis, and z is an aspheric depth (a perpendicular distance between a point on an aspheric surface at a distance of r from the optical axis and a tangent plane tangent to a vertex on the aspheric optical axis).
z＝(cr2)/[1+{1-(k+1)(c2r2)}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).
Table 3 shows free-form surface data in the imaging optical lens 10 according to the first embodiment of the present invention.
[ TABLE 3 ]
Where k is a conic coefficient, Bi is a free-form surface coefficient, r is a perpendicular distance between a point on the free-form surface and the optical axis, x is an x-direction component of r, y is a y-direction component of r, and z is an aspheric depth (a perpendicular distance between a point on the aspheric surface at a distance of r from the optical axis and a tangent plane tangent to a vertex on the aspheric optical axis).
For convenience, each free-form surface uses an extended polynomial surface type (extensedpolynomial) shown in the above formula (2). However, the present invention is not limited to the free-form surface polynomial form expressed by this formula (2).
Fig. 2 shows a case where the RMS spot diameter of the imaging optical lens 10 of the first embodiment is in the first quadrant, and it can be seen from fig. 2 that the imaging optical lens 10 of the first embodiment can achieve good image quality.
Table 19 shown later shows values corresponding to the parameters specified in the conditional expressions for the respective numerical values in examples 1, 2, 3, 4, 5, and 6.
As shown in table 19, the first embodiment satisfies each conditional expression.
In the present embodiment, the imaging optical lens has an entrance pupil diameter ENPD of 0.808mm, a full field image height (diagonal direction) IH of 4.800mm, an x-direction image height of 3.840mm, and a y-direction image height of 2.880mm, and has the best imaging effect in this rectangular range, a diagonal field angle FOV of 101.96 °, an x-direction field angle of 88.99 °, a y-direction field angle of 72.71 °, a wide angle and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.
(second embodiment)
The second embodiment is basically the same as the first embodiment, the same reference numerals as in the first embodiment, and only different points will be described below.
Tables 4 and 5 show design data of the imaging optical lens 20 according to the second embodiment of the present invention. The object-side surface and the image-side surface of the second lens L2 are free-form surfaces.
[ TABLE 4 ]
Table 5 shows aspherical surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
[ TABLE 5 ]
Table 6 shows free-form surface data in the imaging optical lens 20 according to the second embodiment of the present invention.
[ TABLE 6 ]
Fig. 4 shows a case where the RMS spot diameter of the imaging optical lens 20 of the second embodiment is in the first quadrant, and it can be seen from fig. 4 that the imaging optical lens 20 of the second embodiment can achieve good image quality.
As shown in table 19, the second embodiment satisfies each conditional expression.
In the present embodiment, the imaging optical lens has an entrance pupil diameter ENPD of 0.808mm, a full field image height (diagonal direction) IH of 4.800mm, an x-direction image height of 3.840mm, and a y-direction image height of 2.880mm, and has the best imaging effect in this rectangular range, a diagonal field angle FOV of 101.96 °, an x-direction field angle of 89.11 °, a y-direction field angle of 72.73 °, a wide angle, and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.
(third embodiment)
The third embodiment is basically the same as the first embodiment, the same reference numerals as in the first embodiment, and only different points will be described below.
Tables 7 and 8 show design data of the imaging optical lens 30 according to the third embodiment of the present invention. The object-side surface and the image-side surface of the first lens L1 are free-form surfaces.
[ TABLE 7 ]
Table 8 shows aspherical surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.
[ TABLE 8 ]
Table 9 shows free-form surface data in the imaging optical lens 30 according to the third embodiment of the present invention.
[ TABLE 9 ]
Fig. 6 shows a case where the RMS spot diameter of the imaging optical lens 30 of the third embodiment is in the first quadrant, and it can be seen from fig. 6 that the imaging optical lens 30 of the third embodiment can achieve good image quality.
Table 19 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 has an entrance pupil diameter ENPD of 0.808mm, a full field image height (diagonal direction) IH of 4.800mm, an x-direction image height of 3.840mm, and a y-direction image height of 2.880mm, and has the best imaging effect in this rectangular range, a diagonal field angle FOV of 101.99 °, an x-direction field angle of 89.14 °, a y-direction field angle of 72.48 °, a wide angle, and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.
(fourth embodiment)
The fourth embodiment is basically the same as the first embodiment, and the same reference numerals as in the first embodiment, and only different points will be described below.
Tables 10 and 11 show design data of the imaging optical lens 40 according to the fourth embodiment of the present invention. The object-side surface and the image-side surface of the first lens L1 are free-form surfaces.
[ TABLE 10 ]
Table 11 shows aspherical surface data of each lens in the imaging optical lens 40 according to the fourth embodiment of the present invention.
[ TABLE 11 ]
Table 12 shows free-form surface data in the imaging optical lens 40 according to the fourth embodiment of the present invention.
[ TABLE 12 ]
Fig. 8 shows a case where the RMS spot diameter of the imaging optical lens 40 of the fourth embodiment is in the first quadrant, and it can be seen from fig. 8 that the imaging optical lens 40 of the fourth embodiment can achieve good image quality.
Table 19 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 has an entrance pupil diameter ENPD of 1.313mm, a full field image height (diagonal direction) IH of 6.400mm, an x-direction image height of 5.000mm, and a y-direction image height of 4.000mm, and has the best imaging effect in this rectangular range, a diagonal field angle FOV of 89.47 °, an x-direction field angle of 77.80 °, a y-direction field angle of 66.75 °, a wide angle and a thin profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.
(fifth embodiment)
The fifth embodiment is basically the same as the first embodiment, the same reference numerals as in the first embodiment, and only different points will be described below.
Tables 13 and 14 show design data of the imaging optical lens 50 according to the fifth embodiment of the present invention. The object-side surface and the image-side surface of the fifth lens L5 are free-form surfaces.
[ TABLE 13 ]
Table 14 shows aspherical surface data of each lens in the imaging optical lens 50 according to the fifth embodiment of the present invention.
[ TABLE 14 ]
Table 15 shows free-form surface data in the imaging optical lens 50 according to the fifth embodiment of the present invention.
[ TABLE 15 ]
Fig. 10 shows a case where the RMS spot diameter of the imaging optical lens 50 of the fifth embodiment is in the first quadrant, and it can be seen from fig. 10 that the imaging optical lens 50 of the fifth embodiment can achieve good image quality.
Table 19 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 has an entrance pupil diameter ENPD of 1.366mm, a full field image height (diagonal direction) IH of 6.400mm, an x-direction image height of 5.000mm, and a y-direction image height of 4.000mm, and has the best imaging effect in this rectangular range, a diagonal field angle FOV of 87.43 °, an x-direction field angle of 76.10 °, a y-direction field angle of 65.04 °, a wide angle, and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.
(sixth embodiment)
The sixth embodiment is basically the same as the first embodiment, and the same reference numerals as in the first embodiment, and only different points will be described below.
Tables 16 and 17 show design data of the imaging optical lens 60 according to the sixth embodiment of the present invention. The object-side surface and the image-side surface of the second lens L2 are free-form surfaces.
[ TABLE 16 ]
Table 17 shows aspherical surface data of each lens in the imaging optical lens 60 according to the sixth embodiment of the present invention.
[ TABLE 17 ]
Table 18 shows free-form surface data in the imaging optical lens 60 according to the sixth embodiment of the present invention.
[ TABLE 18 ]
Fig. 12 shows a case where the RMS spot diameter of the imaging optical lens 60 of the sixth embodiment is in the first quadrant, and it can be seen from fig. 12 that the imaging optical lens 60 of the sixth embodiment can achieve good image quality.
Table 19 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 has an entrance pupil diameter ENPD of 1.300mm, a full field image height (diagonal direction) IH of 6.400mm, an x-direction image height of 5.000mm, and a y-direction image height of 4.000mm, and has the best imaging effect in this rectangular range, a diagonal field angle FOV of 90.06 °, an x-direction field angle of 78.42 °, a y-direction field angle of 67.44 °, a wide angle and a high profile, and has excellent optical characteristics with on-axis and off-axis chromatic aberration sufficiently corrected.
[ TABLE 19 ]
| Parameter and condition formula | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 |
| f1/f | 5.72 | 5.57 | 5.25 | 2.19 | 2.26 | 2.24 |
| f3/f4 | -4.04 | -3.56 | -1.05 | -4.52 | -3.77 | -5.36 |
| f | 1.955 | 1.955 | 1.955 | 2.953 | 3.074 | 2.925 |
| f1 | 11.182 | 10.898 | 10.266 | 6.452 | 6.941 | 6.552 |
| f2 | 2.846 | 2.755 | 2.707 | 4.059 | 4.015 | 4.093 |
| f3 | -4.176 | -3.539 | -4.344 | -11.213 | -9.413 | -10.663 |
| f4 | 1.033 | 0.993 | 4.149 | 2.483 | 2.500 | 1.988 |
| f5 | -1.127 | -1.127 | -96.229 | -3.040 | -3.025 | -2.353 |
| Fno | 2.42 | 2.42 | 2.42 | 2.25 | 2.25 | 2.25 |
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 (10)
1. An imaging optical lens, in order from an object side to an image side, comprising: the lens comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens;
at least one of the first lens to the fifth lens includes a free-form surface, a focal length of the image pickup optical lens is f, a focal length of the first lens is f1, a focal length of the third lens is f3, and a focal length of the fourth lens is f4, and the following relationships are satisfied:
2.00≤f1/f≤6.00；
-5.50≤f3/f4≤-1.00。
2. the imaging optical lens according to claim 1, wherein an on-axis thickness of the second lens is d3, an on-axis distance from an image-side surface of the second lens to an object-side surface of the third lens is d4, and the following relationship is satisfied:
2.00≤d3/d4≤8.00。
3. the imaging optical lens according to claim 1, wherein an on-axis thickness of the fourth lens is d7, an on-axis distance from an image-side surface of the fourth lens to an object-side surface of the fifth lens is d8, and the following relational expression is satisfied:
2.20≤d7/d8≤21.00。
4. the image-capturing optical lens unit according to claim 1, wherein the radius of curvature of the object-side surface of the first lens element is R1, the radius of curvature of the image-side surface of the first lens element is R2, the on-axis thickness of the first lens element is d1, the total optical length of the image-capturing optical lens unit is TTL, and the following relationships are satisfied:
-6.47≤(R1+R2)/(R1-R2)≤8.76；
0.03≤d1/TTL≤0.13。
5. the imaging optical lens of claim 1, wherein the second lens has a focal length of f2, a radius of curvature of an object-side surface of the second lens is R3, a radius of curvature of an image-side surface of the second lens is R4, an on-axis thickness of the second lens is d3, and an optical total length of the imaging optical lens is TTL and satisfies the following relationship:
0.65≤f2/f≤2.18；
0.23≤(R3+R4)/(R3-R4)≤1.97；
0.04≤d3/TTL≤0.19。
6. the image-capturing optical lens unit according to claim 1, wherein the radius of curvature of the object-side surface of the third lens element is R5, the radius of curvature of the image-side surface of the third lens element is R6, the on-axis thickness of the third lens element is d5, the total optical length of the image-capturing optical lens unit is TTL, and the following relationships are satisfied:
-7.59≤f3/f≤-1.21；
-4.61≤(R5+R6)/(R5-R6)≤2.09；
0.02≤d5/TTL≤0.09。
7. the image-capturing optical lens unit according to claim 1, wherein the radius of curvature of the object-side surface of the fourth lens element is R7, the radius of curvature of the image-side surface of the fourth lens element is R8, the on-axis thickness of the fourth lens element is d7, the total optical length of the image-capturing optical lens unit is TTL, and the following relationships are satisfied:
0.25≤f4/f≤3.18；
0.66≤(R7+R8)/(R7-R8)≤8.68；
0.05≤d7/TTL≤0.31。
8. the image-capturing optical lens unit according to claim 1, wherein the fifth lens element has a focal length f5, a radius of curvature of an object-side surface of the fifth lens element is R9, a radius of curvature of an image-side surface of the fifth lens element is R10, an on-axis thickness of the fifth lens element is d9, an optical total length of the image-capturing optical lens unit is TTL, and the following relationship is satisfied:
-98.44≤f5/f≤-0.38；
0.70≤(R9+R10)/(R9-R10)≤12.48；
0.05≤d9/TTL≤0.19。
9. an image-capturing optical lens according to claim 1, characterized in that the F-number of the aperture of the image-capturing optical lens is Fno and satisfies the following relation:
Fno≤2.49。
10. the imaging optical lens according to claim 1, wherein an optical total length of the imaging optical lens is TTL, a full field of view height of a diagonal of the imaging optical lens is IH, and the following relationship is satisfied:
TTL/IH≤0.88。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004037977A (en) * | 2002-07-05 | 2004-02-05 | Minolta Co Ltd | Projection optical system |
| EP1679542A1 (en) * | 2003-10-08 | 2006-07-12 | Kenji Nishi | Image display unit |
| CN202661703U (en) * | 2012-04-06 | 2013-01-09 | 大立光电股份有限公司 | Optical imaging lens system |
| CN110389427A (en) * | 2019-06-30 | 2019-10-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
-
2019
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004037977A (en) * | 2002-07-05 | 2004-02-05 | Minolta Co Ltd | Projection optical system |
| EP1679542A1 (en) * | 2003-10-08 | 2006-07-12 | Kenji Nishi | Image display unit |
| CN202661703U (en) * | 2012-04-06 | 2013-01-09 | 大立光电股份有限公司 | Optical imaging lens system |
| CN110389427A (en) * | 2019-06-30 | 2019-10-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111367047A (en) * | 2020-03-31 | 2020-07-03 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
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