CN105388592B - Photographic optical system - Google Patents
Photographic optical system Download PDFInfo
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- CN105388592B CN105388592B CN201510982115.XA CN201510982115A CN105388592B CN 105388592 B CN105388592 B CN 105388592B CN 201510982115 A CN201510982115 A CN 201510982115A CN 105388592 B CN105388592 B CN 105388592B
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- 101100148680 Arabidopsis thaliana SAG12 gene Proteins 0.000 description 1
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Classifications
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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
- G02B13/18—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 present invention provides a kind of photographic optical system, the photographic optical system includes the first lens (focal length f1) of coaxial arrangement from object side to image side successively, second lens (focal length f2), third lens (focal length f3), 4th lens (focal length f4), 5th lens (focal length f5), 6th lens (focal length f6) and the 7th lens (focal length f7), and it satisfies the following conditional expression, 10 ＜ f1/f ＜ 15, 20 ＜ f2/f ＜ 80, 0.5 ＜ f3/f ＜ 1.5, 2.5 ＜ f4/f ＜ 0.5, 10 ＜ f5/f ＜ 2, 0.2 ＜ f6/f ＜ 1.2, 2.5 ＜ f7/f ＜ 0.4, wherein f is the focal length of whole system.Photographic optical system provided by the invention by reasonably optimizing face type, distribution focal power, selection optical material, devise object lens of large relative aperture photographic optical system, the imaging performance being capable of providing under low light environment, imaging clearly.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to a photographing optical system, and more particularly, to a photographing optical system for a portable electronic device.
[ background of the invention ]
In recent years, with the rapid development of miniaturized camera lenses, the demand of miniature image capture modules is increasing, and the photosensitive elements of general camera lenses are not only photosensitive coupling elements or complementary metal oxide conductor elements, and with the refinement of semiconductor manufacturing process technology, the pixel size of the photosensitive elements is further reduced, and in addition, the development trend of electronic products is to have good functions, light weight, small size, and small size, so that the miniaturized camera lenses with good imaging quality become the mainstream in the market at present.
In a photographing lens using a photosensitive element, resolution of an image is gradually increased and a pixel size is gradually decreased, and a lens corresponding to the image needs to satisfy high resolution and excellent optical performance, such as wide angle of the lens, high dynamic range imaging of the lens, and reduction of tolerance sensitivity of the lens. The conventional photographing lens with seven lens groups is limited by structure, cannot further correct high-level aberration such as spherical aberration, and is limited in imaging performance.
[ summary of the invention ]
In order to solve the technical problems, the invention provides a novel optical system structure form, reasonably optimizes the surface type, distributes focal power, selects optical materials, and designs a seven-lens group photographing optical system which is suitable for portable electronic equipment and can clearly image.
The invention provides a photographic optical system, which comprises the following components in sequence from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element, which are coaxially disposed, and satisfy the following conditional expressions (1) to (7):
10﹤f1/f﹤15 (1)；
20﹤f2/f﹤80 (2)；
0.5﹤f3/f﹤1.5 (3)；
-2.5﹤f4/f﹤-0.5 (4)；
-10﹤f5/f﹤-2 (5)；
0.2﹤f6/f﹤1.2 (6)；
-2.5﹤f7/f﹤-0.4 (7)；
wherein,
f 1: a focal length of the first lens;
f 2: a focal length of the second lens;
f 3: a focal length of the third lens;
f 4: a focal length of the fourth lens;
f 5: a focal length of the fifth lens;
f 6: a focal length of the sixth lens;
f 7: a focal length of the seventh lens;
f: a focal length of the entire photographing optical system.
In a preferred embodiment of the photographing optical system according to the present invention, the photographing optical system further satisfies the following conditional expressions (1a) to (7 a):
30mm﹤f1﹤80mm (1a)；
f2＝205.301mm (2a)；
2mm﹤f3﹤5mm (3a)；
-10mm﹤f4﹤-2mm (4a)；
-30mm﹤f5﹤-10mm (5a)；
1mm﹤f6﹤5mm (6a)；
-5mm﹤f7﹤-1.5mm (7a)。
in a preferred embodiment of the photographing optical system according to the present invention, the photographing optical system further satisfies the following conditional expressions (1b) to (7 b):
1.50﹤n1﹤1.55 (1b)；
1.50﹤n2﹤1.55 (2b)；
1.50﹤n3﹤1.55 (3b)；
1.60﹤n4﹤1.70 (4b)；
1.60﹤n5﹤1.70 (5b)；
1.50﹤n6﹤1.55 (6b)；
1.50﹤n7﹤1.55 (7b)；
wherein,
n 1: the refractive index of the first lens is such that,
n 2: the refractive index of the second lens is such that,
n 3: the refractive index of the third lens is such that,
n 4: the refractive index of the fourth lens is such that,
n 5: the refractive index of the fifth lens element is,
n 6: the refractive index of the sixth lens element is,
n 7: refractive index of the seventh lens.
In a preferred embodiment of the photographing optical system according to the present invention, the photographing optical system further satisfies the following conditional expressions (1c) to (7 c):
40﹤v1﹤60 (1c)；
40﹤v2﹤60 (2c)；
40﹤v3﹤60 (3c)；
15﹤v4﹤30 (4c)；
15﹤v5﹤30 (5c)；
40﹤v6﹤60 (6c)；
40﹤v7﹤60 (7c)；
wherein,
v 1: abbe number of the first lens;
v 2: abbe number of the second lens;
v 3: abbe number of the third lens;
v 4: abbe number of the fourth lens;
v 5: abbe number of the fifth lens;
v 6: abbe number of the sixth lens;
v 7: abbe number of the seventh lens.
In a preferred embodiment of the photographing optical system according to the present invention, the first lens and the second lens satisfy the following conditional expressions:
f12>50mm；
wherein,
f 12: a combined focal length of the first lens and the second lens.
In a preferred embodiment of the photographing optical system according to the present invention, the first lens is a positive lens, and an object-side surface of the first lens is a convex surface.
In a preferred embodiment of the photographing optical system according to the present invention, the seventh lens is a negative lens.
In a preferred embodiment of the photographing optical system according to the present invention, the photographing optical system further satisfies the following conditional expression:
TTL﹤5.5mm；
78°﹤FOV﹤88°；
wherein,
TTL: a distance from an object side surface of the first lens to an imaging surface;
FOV: the maximum field angle range shot by the shooting optical system.
In a preferred embodiment of the photographing optical system according to the present invention, the image-side surface of the seventh lens has at least one inflection point and at least one stagnation point.
In a preferred embodiment of the photographing optical system provided by the present invention, the photographing optical system further includes an aperture stop provided on an object-side surface of the third lens.
Compared with the related art, the photographic optical system provided by the invention has the following beneficial effects:
according to the invention, through reasonably optimizing the surface type, distributing focal power and selecting optical materials, a large-relative-aperture photographic optical system is designed, and clear imaging in a low-illumination environment can be realized; the combined focal power of the first lens and the second lens is approximate to a zero focal power lens group, so that spherical aberration can be reasonably corrected, and chromatic aberration and field curvature cannot be introduced; the fourth lens and the fifth lens are made of materials with high refractive index and low Abbe number, so that the chromatic aberration of the system can be effectively reduced; the seventh lens is a negative focal power lens, so that the field curvature of the system can be effectively reduced.
[ 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 structural diagram of a preferred embodiment of a photographing optical system according to the present invention;
fig. 2 is an MTF graph of the photographing optical system shown in fig. 1;
FIG. 3 is a field curvature graph of the photographing optical system shown in FIG. 1;
fig. 4 is a distortion graph of the photographing optical system shown in fig. 1.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a photographing optical system according to a preferred embodiment of the present invention. The photographing optical system 1 mainly includes seven coaxially disposed lenses, and includes, in order from an object side to an image side, a first lens 110, a second lens 120, a third lens 130, a fourth lens 140, a fifth lens 150, a sixth lens 160, and a seventh lens 170, in this embodiment, the seven lenses are all plastic lenses, and the specific structure thereof is as follows:
the first lens element 110 is a positive lens element having a positive refractive power, the object-side surface 112 of the first lens element is a convex surface and is made of plastic material, and the object-side surface 112 and/or the image-side surface 114 of the first lens element 110 can be spherical or aspheric;
the object-side surface 122 of the second lens element 120 is concave and the image-side surface 124 is convex, and is made of plastic material;
the object-side surface 132 and the image-side surface 134 of the third lens element 130 are convex and concave, and are made of plastic material, the object-side surface 132 and the image-side surface 134 of the third lens element 130 are aspheric, and the image-side surface of the third lens element 130 is provided with an inflection point and a stagnation point;
the object-side surface 142 and the image-side surface 144 of the fourth lens element 140 are convex and concave, and are made of plastic material, the object-side surface 142 and the image-side surface 144 of the fourth lens element 140 are aspheric, and an inflection point is disposed on the object-side surface of the fourth lens element 140;
the object-side surface 152 and the image-side surface 154 of the fifth lens element 150 are concave and convex, and are made of plastic material, the object-side surface 152 and the image-side surface 154 of the fifth lens element 150 are aspheric, and an inflection point is disposed on the image-side surface of the fifth lens element 150;
the object-side surface 162 of the sixth lens element 160 is a concave surface and the image-side surface 164 is a convex surface, and is made of a plastic material, the object-side surface 162 and the image-side surface 164 of the sixth lens element 160 are aspheric surfaces, and the image-side surface of the sixth lens element 160 is provided with an inflection point and a stagnation point;
the seventh lens element 170 is a negative lens element, the object-side surface 172 of the seventh lens element 170 is a concave surface, the image-side surface 174 of the seventh lens element 170 is a surface that changes from a concave surface to a convex surface from a paraxial region to a peripheral region, the seventh lens element 170 is made of plastic material, the object-side surface 172 and the image-side surface 174 of the seventh lens element 170 are aspheric, the object-side surface 172 of the seventh lens element 170 is respectively provided with an inflection point, the image-side surface 174 of the seventh lens element 170 is provided with at least one inflection point and at least one stagnation point, in this embodiment, the image-side surface 174 of the seventh lens element 170 is provided with two inflection points and one stagnation point, and in other embodiments, other numbers of inflection points and stagnation points may be set as needed.
Wherein, the object side surface is a convex surface, which means that the object side surface is formed into a convex shape towards the object; the object side surface is a concave surface, which means that the object side surface faces the object to form a concave shape; the image side surface is convex, namely the image side surface faces the image surface to form a convex shape; the image side surface is concave, which is a shape in which the image side surface is recessed toward the image plane.
The focal power of the combination of the first lens 110 and the second lens 120 is approximately zero, spherical aberration can be reasonably corrected, chromatic aberration and curvature of field are not introduced, and the first lens 110 and the second lens 120 satisfy the conditional expression: f12>50mm, wherein f 12: a combined focal length of the first lens and the second lens. The fourth lens 140 and the fifth lens 150 are made of optical materials with high refractive index and low abbe number, which can effectively reduce chromatic aberration of the system, and the seventh lens 170 is a negative power lens, which can effectively reduce curvature of field of the system. By reasonably optimizing the surface types of the seven lenses, distributing the focal power and selecting the optical materials, the photographic optical system 1 can have better imaging performance under low illumination.
The photographing optical system 1 further includes an aperture stop 100 and a glass plate 180, and the aperture stop 100 is disposed on the object side surface 132 of the third lens element 130 and is used for controlling the amount of light entering and the depth of field. The glass plate 180 is disposed on the image side 174 of the seventh lens 170, and the glass plate 180 may be a filter, which has a function of filtering light, and the type of the filter may be selected according to the needs of the actual situation. An imaging plane 190, i.e. a plane on which an object is imaged, is located on a side of the glass plate 180 away from the seventh lens 170.
In order to meet the design requirements of the photographing optical system 1 for miniaturization, high sensitivity, high optical performance, and a wide field angle, the photographing optical system provided by the present invention needs to satisfy the following conditions for the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, and the seventh lens 170 of the photographing optical system 1:
firstly, focal length:
with the overall configuration of the photographing optical system 1, the focal lengths of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, and the seventh lens 170 of the photographing optical system 1 need to satisfy the following conditions:
30mm﹤f1﹤80mm，f2＝205.301mm，2mm﹤f3﹤5mm，-10mm﹤f4﹤-2mm，-30mm﹤f5﹤-10mm，1mm﹤f6﹤5mm，-5mm﹤f7﹤-1.5mm；
and < 10 > < f1/f < 15, < 20 > f2/f < 80, 0.5 < f3/f < 1.5, -2.5 < f4/f < -0.5, -10 < f5/f < 2, 0.2 < f6/f < 1.2, and-2.5 < f7/f < 0.4;
wherein,
f 1: a focal length of the first lens;
f 2: a focal length of the second lens;
f 3: a focal length of the third lens;
f 4: a focal length of the fourth lens;
f 5: a focal length of the fifth lens;
f 6: a focal length of the sixth lens;
f 7: a focal length of the seventh lens;
f: a focal length of the entire photographing optical system.
Second, refractive index
With the overall configuration of the photographing optical system 1, the refractive indices of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, and the seventh lens 170 of the photographing optical system 1 need to satisfy the condition:
1.50<n1<1.55，1.50﹤n2﹤1.55，1.50﹤n3﹤1.55，
1.60﹤n4﹤1.70，1.60﹤n5﹤1.70，1.50﹤n6﹤1.55，
1.50﹤n7﹤1.55；
wherein,
n 1: a refractive index of the first lens;
n 2: a refractive index of the second lens;
n 3: a refractive index of the third lens;
n 4: a refractive index of the fourth lens;
n 5: a refractive index of the fifth lens;
n 6: a refractive index of the sixth lens;
n 7: refractive index of the seventh lens.
Third, Abbe number
With the overall configuration of the photographing optical system 1, the abbe numbers of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, and the seventh lens 170 of the photographing optical system 1 need to satisfy the condition:
40﹤v1﹤60，40﹤v2﹤60，40﹤v3﹤60，15﹤v4﹤30，
15﹤v5﹤30，40﹤v6﹤60，40﹤v7﹤60，
wherein
v 1: abbe number of the first lens;
v 2: abbe number of the second lens;
v 3: abbe number of the third lens;
v 4: abbe number of the fourth lens;
v 5: abbe number of the fifth lens;
v 6: abbe number of the sixth lens;
v 7: abbe number of the seventh lens.
If the focal length, refractive index, and abbe number of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, and the seventh lens 170 do not satisfy the above conditions, the chromatic aberration characteristic and the telecentric characteristic of the photographing optical system 1 may be deteriorated, the sensitivity of the photographing optical system 1 may be increased, it is difficult to realize the miniaturization and wide angle of view of the photographing optical system 1, and it is disadvantageous to reduce the cost of the photographing optical system 1.
In this embodiment, the focal length, refractive index, and abbe number of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, the sixth lens 160, the seventh lens 170, and the glass plate 180 of the photographing optical system 1 are respectively as shown in table 1 below:
continuity, curvature radius, SAG, and half-diameter SD data of the object-side surface and image-side surface of the first lens 110(P1), the second lens 120(P2), the third lens 130(P3), the fourth lens 140(P4), the fifth lens 150(P5), the sixth lens 160(P6), and the seventh lens 170(P7) of the photographing optical system 1 are shown in table 2:
wherein
R11: the radius of curvature of the object-side surface of the first lens P1;
r12: the radius of curvature of the image-side surface of the first lens P1;
r21: the radius of curvature of the object-side surface of the second lens P2;
r22: the radius of curvature of the image-side surface of the second lens P2;
r31: the radius of curvature of the object-side surface of the third lens P3;
r32: the radius of curvature of the image-side surface of the third lens P3;
r41: the radius of curvature of the object-side surface of the fourth lens P4;
r42: the radius of curvature of the image-side surface of the fourth lens P4;
r51: the radius of curvature of the object-side surface of the fifth lens P5;
r52: a radius of curvature of the image-side surface of the fifth lens P5;
r61: the radius of curvature of the object-side surface of the sixth lens P6;
r62: a radius of curvature of the image-side surface of the sixth lens P6;
r71: the radius of curvature of the object side of the seventh lens P7;
r72: the radius of curvature of the image-side surface of the seventh lens P7;
the distance from the lens surface of the SAG11 first lens to the lens center of the object side surface in a projection mode at the optical axis position;
the distance from the lens surface of the SAG12 first lens to the lens center of the image side surface in a projection mode at the optical axis position;
the distance from the lens surface of the SAG21 second lens to the lens center of the object side in a projection mode at the optical axis position;
the distance from the lens surface of the SAG22 second lens to the lens center of the image side surface in a projection mode at the optical axis position;
the distance from the lens surface of the SAG31 third lens to the lens center of the object side in a projection mode at the optical axis position;
the distance from the lens surface of the SAG32 third lens to the lens center of the image side surface in a projection mode at the optical axis position;
the distance from the lens surface of the SAG41 fourth lens to the lens center of the object side in the projection of the optical axis position;
the distance from the lens surface of the SAG42 fourth lens to the lens center of the image side surface in a projection mode at the optical axis position;
the distance from the lens surface of the SAG51 fifth lens to the lens center of the object side in a projection mode at the optical axis position;
the distance from the lens surface of the SAG52 fifth lens to the lens center of the image side surface in a projection mode at the optical axis position;
the distance from the lens surface of the SAG61 sixth lens projected on the optical axis position to the lens center of the object side;
the distance from the lens surface of the SAG62 sixth lens to the lens center of the image side surface in a projection mode at the optical axis position;
the distance from the lens surface of the SAG71 seventh lens projected at the optical axis position to the lens center of the object side;
and the SAG72 is projected on the distance from the optical axis position to the lens center of the image side surface.
The thicknesses of the first lens 110(P1), the second lens 120(P2), the stop 100(ST), the third lens 130(P3), the fourth lens 140(P4), the fifth lens 150(P5), the sixth lens 160(P6), the seventh lens 170(P7), and the glass plate 180(Tg) of the photographing optical system 1 are as shown in table 3:
wherein,
t1: a thickness of the first lens;
t12: the distance between the image side surface of the first lens and the object side surface of the second lens on the optical axis;
t2: a thickness of the second lens;
ST: the thickness of the aperture;
t23: the distance between the diaphragm and the object side surface of the third lens is on the optical axis;
t3: a thickness of the third lens;
t34: the distance between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis;
t4: a thickness of the fourth lens;
t45: the distance between the image side of the fourth lens and the optical axis of the fifth lens is shorter than the distance between the image side of the fourth lens and the optical axis of the fifth lens;
t5: a thickness of the fifth lens;
t56: the distance between the fifth lens and the sixth lens on the optical axis;
t6: a thickness of the sixth lens;
t67: the spacing distance between the sixth lens and the seventh lens on the optical axis;
t7: the thickness of the seventh lens.
In the present embodiment, DFOV is 78.00 °, HFOV is 62.40 °, VFOV is 46.80 °, where FOV is defined as the maximum field angle range of the photographing optical system, HFOV is defined as the horizontal field angle, DFOV is defined as the diagonal field angle, and VFOV is defined as the vertical field angle.
Referring to fig. 2, fig. 3 and fig. 4, wherein fig. 2 is a MTF graph of the photographing optical system shown in fig. 1, fig. 3 is a field curvature graph of the photographing optical system shown in fig. 1, and fig. 4 is a distortion graph of the photographing optical system shown in fig. 1. As shown in fig. 2, 3 and 4, the photographing optical system 1 provided by the present invention has high optical performance.
In addition, in the photographing optical system 1 provided by the present invention, the photographing optical system 1 is designed based on an optical system with a large relative aperture, the total optical length is less than 5.5mm, and the angle of view is between 78 ° and 88 °.
The photographic optical system 1 provided by the invention has the following beneficial effects:
according to the invention, by reasonably optimizing the surface type, distributing the focal power and selecting the optical material, a large-relative-aperture photographic optical system is designed, the imaging performance under a low-illumination environment can be provided, and the imaging is clear; the combined focal power of the first lens 110 and the second lens 120 is approximate to a non-focal power lens group, so that spherical aberration can be reasonably corrected, and chromatic aberration and curvature of field cannot be introduced; the fourth lens 140 and the fifth lens 150 are made of materials with high refractive index and low abbe number, so that the chromatic aberration of the system can be effectively reduced; the seventh lens 170 is a negative power lens, which can effectively reduce the curvature of field of the system.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An imaging optical system comprising, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element, which are coaxially disposed, and satisfy the following conditional expressions (1) to (7):
10﹤f1/f﹤15 (1)；
20﹤f2/f﹤80 (2)；
0.5﹤f3/f﹤1.5 (3)；
-2.5﹤f4/f﹤-0.5 (4)；
-10﹤f5/f﹤-2 (5)；
0.2﹤f6/f﹤1.2 (6)；
-2.5﹤f7/f﹤-0.4 (7)；
wherein,
f 1: a focal length of the first lens;
f 2: a focal length of the second lens;
f 3: a focal length of the third lens;
f 4: a focal length of the fourth lens;
f 5: a focal length of the fifth lens;
f 6: a focal length of the sixth lens;
f 7: a focal length of the seventh lens;
f: a focal length of the entire photographing optical system.
2. The photographing optical system according to claim 1, wherein the photographing optical system further satisfies the following conditional expressions (1a) to (7 a):
30mm﹤f1﹤80mm (1a)；
f2＝205.301mm (2a)；
2mm﹤f3﹤5mm (3a)；
-10mm﹤f4﹤-2mm (4a)；
-30mm﹤f5﹤-10mm (5a)；
1mm﹤f6﹤5mm (6a)；
-5mm﹤f7﹤-1.5mm (7a)。
3. the photographing optical system according to claim 1, wherein the photographing optical system further satisfies the following conditional expressions (1b) to (7 b):
1.50﹤n1﹤1.55 (1b)；
1.50﹤n2﹤1.55 (2b)；
1.50﹤n3﹤1.55 (3b)；
1.60﹤n4﹤1.70 (4b)；
1.60﹤n5﹤1.70 (5b)；
1.50﹤n6﹤1.55 (6b)；
1.50﹤n7﹤1.55 (7b)；
wherein,
n 1: a refractive index of the first lens;
n 2: a refractive index of the second lens;
n 3: a refractive index of the third lens;
n 4: a refractive index of the fourth lens;
n 5: a refractive index of the fifth lens;
n 6: a refractive index of the sixth lens;
n 7: refractive index of the seventh lens.
4. The photographing optical system according to claim 1, wherein the photographing optical system further satisfies the following conditional expressions (1c) to (7 c):
40﹤v1﹤60 (1c)；
40﹤v2﹤60 (2c)；
40﹤v3﹤60 (3c)；
15﹤v4﹤30 (4c)；
15﹤v5﹤30 (5c)；
40﹤v6﹤60 (6c)；
40﹤v7﹤60 (7c)；
wherein,
v 1: abbe number of the first lens;
v 2: abbe number of the second lens;
v 3: abbe number of the third lens;
v 4: abbe number of the fourth lens;
v 5: abbe number of the fifth lens;
v 6: abbe number of the sixth lens;
v 7: abbe number of the seventh lens.
5. The photographic optical system according to claim 1, wherein the first lens and the second lens satisfy the following conditional expressions:
f12>50mm；
wherein,
f 12: a combined focal length of the first lens and the second lens.
6. The photographing optical system according to claim 2, wherein the first lens is a positive lens, and an object side surface of the first lens is a convex surface.
7. The photographic optical system according to claim 1, wherein the seventh lens is a negative lens.
8. The photographic optical system according to claim 1, characterized in that the photographic optical system further satisfies the following conditional expression:
TTL﹤5.5mm；
78°﹤FOV﹤88°；
wherein,
TTL: a distance from an object side surface of the first lens to an imaging surface;
FOV: the maximum field angle range shot by the shooting optical system.
9. The photographing optical system according to claim 7, wherein an image side surface of the seventh lens has at least one inflection point and at least one stagnation point.
10. The photographing optical system according to claim 1, further comprising an aperture provided on an object side surface of the third lens.
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| CN201510982115.XA CN105388592B (en) | 2015-12-24 | 2015-12-24 | Photographic optical system |
| JP2016144112A JP2017116912A (en) | 2015-12-24 | 2016-07-22 | Image capturing optical system |
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| TWI614517B (en) | 2017-01-04 | 2018-02-11 | 大立光電股份有限公司 | Image picking-up system, image capturing apparatus and electronic device |
| WO2019056758A1 (en) * | 2017-09-21 | 2019-03-28 | 浙江舜宇光学有限公司 | Camera lens assembly |
| TWI642991B (en) | 2017-12-25 | 2018-12-01 | 大立光電股份有限公司 | Photographing lens assembly, imaging apparatus and electronic device |
| TWI667509B (en) * | 2018-05-10 | 2019-08-01 | 大立光電股份有限公司 | Photographing optical lens assembly, imaging apparatus and electronic device |
| TWI664468B (en) * | 2018-05-21 | 2019-07-01 | 大立光電股份有限公司 | Photographing optical lens assembly, imaging apparatus and electronic device |
| CN109212752B (en) | 2018-06-20 | 2021-03-16 | 浙江舜宇光学有限公司 | Optical system |
| CN108873252B (en) * | 2018-07-02 | 2023-12-19 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN109683285B (en) * | 2019-01-23 | 2024-06-21 | 广东弘景光电科技股份有限公司 | Large-aperture telephoto optical system and camera module using same |
| CN110361854B (en) * | 2019-08-19 | 2024-04-23 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN111413784A (en) * | 2020-05-15 | 2020-07-14 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN115598803A (en) * | 2021-04-01 | 2023-01-13 | 浙江舜宇光学有限公司（Cn） | Optical imaging lens |
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| TWI449947B (en) * | 2012-08-13 | 2014-08-21 | Largan Precision Co Ltd | Image lens assembly system |
| JP6133068B2 (en) * | 2013-01-30 | 2017-05-24 | カンタツ株式会社 | Imaging lens |
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| JP6191820B2 (en) * | 2013-10-04 | 2017-09-06 | コニカミノルタ株式会社 | Imaging lens, imaging device, and portable terminal |
| US10018805B2 (en) * | 2013-10-14 | 2018-07-10 | Samsung Electro-Mechanics Co., Ltd. | Lens module |
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