CN105388592A - Photo-optical system - Google Patents
Photo-optical system Download PDFInfo
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- CN105388592A CN105388592A CN201510982115.XA CN201510982115A CN105388592A CN 105388592 A CN105388592 A CN 105388592A CN 201510982115 A CN201510982115 A CN 201510982115A CN 105388592 A CN105388592 A CN 105388592A
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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 invention provides a photo-optical system. The photo-optical system sequentially comprises, from an object side to an image side, a first lens (the focal length being f1), a second lens (the focal length being f2), a third lens (the focal length being f3), a fourth lens (the focal length being f4), a fifth lens (the focal length being f5), a sixth lens (the focal length being f6), and a seventh lens (the focal length being f7), which are all arranged in a coaxial manner. Moreover, the focal lengths meet the following condition: 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, f being the focal length of the whole system. Through reasonable optimization of a facial form, distribution of focal power focal power and selection of optical materials, the photo-optical system with a relatively large aperture is designed, the imaging performance in a low illumination environment is ensured, and imaging is clear.
Description
[technical field]
The present invention relates to photographic optical system, be specifically related to a kind of photographic optical system for portable electric appts.
[background technology]
In recent years, flourish along with miniaturization phtographic lens, the demand of minisize image acquisition module day by day improves, and the photo-sensitive cell of general phtographic lens is nothing more than being photosensitive coupling element or complementary metal oxide conductor element two kinds, along with progressing greatly of semiconductor fabrication process technology, the Pixel Dimensions of photo-sensitive cell reduces further, in addition now electronic product with function good and compact be development trend, therefore, the miniaturization phtographic lens possessing good image quality becomes main flow in the market.
In the phtographic lens of use sense optical element, the resolution of image increases gradually, Pixel Dimensions reduces gradually, require that the camera lens corresponding with it just need meet high resolving power and excellent optical property, such as realize camera lens wide angle, realize camera lens high dynamic range imaging, and reduce the tolerance sensitivities etc. of camera lens.The phtographic lens of existing seven mirror groups, by structural limitations, cannot correct senior aberration further, such as spherical aberration, cause imaging performance limited.
[summary of the invention]
For solving the problems of the technologies described above, the invention provides a kind of new optical system structure form, reasonably optimizing face type, distribution focal power, selection optical material, devise and be applicable to mancarried electronic aid and seven of blur-free imaging mirror group photographic optical systems.
The invention provides a kind of photographic optical system, be followed successively by image side from thing side: coaxial the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens arranged, and satisfy the following conditional expression (1) ~ (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,
The focal length of the f1: the first lens;
The focal length of the f2: the second lens;
The focal length of the f3: the three lens;
The focal length of the f4: the four lens;
The focal length of the f5: the five lens;
The focal length of the f6: the six lens;
The focal length of the f7: the seven lens;
F: the focal length of whole described photographic optical system.
In photographic optical system one provided by the invention preferred embodiment, described photographic optical system also satisfies the following conditional expression (1a) ~ (7a):
30mm＜f1＜80mm(1a)；
50mm＜f2＜100mm(2a)；
2mm＜f3＜5mm(3a)；
-10mm＜f4＜-2mm(4a)；
-30mm＜f5＜-10mm(5a)；
1mm＜f6＜5mm(6a)；
-5mm＜f7＜-1.5mm(7a)。
In photographic optical system one provided by the invention preferred embodiment, described photographic optical system also satisfies the following conditional expression (1b) ~ (7b):
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,
The refractive index of the n1: the first lens,
The refractive index of the n2: the second lens,
The refractive index of the n3: the three lens,
The refractive index of the n4: the four lens,
The refractive index of the n5: the five lens,
The refractive index of the n6: the six lens,
The refractive index of the n7: the seven lens.
In photographic optical system one provided by the invention preferred embodiment, described photographic optical system also satisfies the following conditional expression (1c) ~ (7c):
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,
The Abbe number of the v1: the first lens;
The Abbe number of the v2: the second lens;
The Abbe number of the v3: the three lens;
The Abbe number of the v4: the four lens;
The Abbe number of the v5: the five lens;
The Abbe number of the v6: the six lens;
The Abbe number of the v7: the seven lens.
In photographic optical system one provided by the invention preferred embodiment, described first lens and described second lens satisfy the following conditional expression:
F12 > 50mm or f12 <-50mm;
Wherein,
The combined focal length of the f12: the first lens and the second lens.
In photographic optical system one provided by the invention preferred embodiment, described first lens are positive lens, and the thing side of described first lens is convex surface.
In photographic optical system one provided by the invention preferred embodiment, described 7th lens are negative lens.
In photographic optical system one provided by the invention preferred embodiment, described photographic optical system also satisfies the following conditional expression:
TTL＜5.5mm；
78°＜FOV＜88°；
Wherein,
TTL: the distance from the thing side of described first lens to imaging surface;
FOV: maximum field of view's angular region that described photographic optical system photographs.
In photographic optical system one provided by the invention preferred embodiment, the image side mask of described 7th lens has at least one point of inflexion and at least one stationary point.
In photographic optical system one provided by the invention preferred embodiment, described photographic optical system comprise further be arranged at described 3rd lens thing side on aperture.
Compared to correlation technique, photographic optical system provided by the invention has following beneficial effect:
The present invention by reasonably optimizing face type, distribute focal power, select optical material, devise object lens of large relative aperture photographic optical system, imaging clearly under low-light (level) environment can be realized; The combined light focal power of described first lens and described second lens combination is approximately without focal power mirror group, rationally can correct spherical aberration, and can not introduce aberration and the curvature of field; Described 4th lens and described 5th lens adopt the material of high index of refraction, low Abbe number, can effectively reduce system aberration; Described 7th lens are that negative-power lenses can effectively reduce the system curvature of field.
[accompanying drawing explanation]
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the structural representation of a preferred embodiment of photographic optical system provided by the invention;
Fig. 2 is the MTF curve map of photographic optical system shown in Fig. 1;
Fig. 3 is the curvature of field curve map of photographic optical system shown in Fig. 1;
Fig. 4 is the distortion curve figure of photographic optical system shown in Fig. 1.
[embodiment]
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, is the structural representation of a preferred embodiment of photographic optical system provided by the invention.Described photographic optical system 1 is formed primarily of coaxial seven lens arranged, the first lens 110, second lens 120, the 3rd lens 130, the 4th lens 140, the 5th lens 150, the 6th lens 160 and the 7th lens 170 are comprised successively from thing side to image side, in the present embodiment, above-mentioned seven lens are all plastic lens, and its concrete structure is as follows:
Described first lens 110 are positive lens, and it has positive light coke, and its thing side 112 is convex surface, is made up of plastic cement material, and the thing side 112 of described first lens 110 is or/and face, image side 114 can be sphere or aspheric surface;
The thing side 122 of described second lens 120 is concave surface and face, image side 124 is convex surface, is made up of plastic cement material;
The thing side 132 of described 3rd lens 130 is convex surface and face, image side 134 is concave surface, be made up of plastic cement material, thing side 132 and the face, image side 134 of described 3rd lens 130 are aspheric surface, and the face, image side of described 3rd lens 130 is provided with a point of inflexion and a stationary point;
The thing side 142 of described 4th lens 140 is convex surface and face, image side 144 is concave surface, and be made up of plastic cement material, thing side 142 and the face, image side 144 of described 4th lens 140 are aspheric surface, and the thing side of described 4th lens 140 is provided with a point of inflexion;
The thing side 152 of described 5th lens 150 is concave surface and face, image side 154 is convex surface, and be made up of plastic cement material, thing side 152 and the face, image side 154 of described 5th lens 150 are aspheric surface, and the face, image side of described 5th lens 150 is provided with a point of inflexion;
The thing side 162 of described 6th lens 160 is concave surface and face, image side 164 is convex surface, be made up of plastic cement material, thing side 162 and the face, image side 164 of described 6th lens 160 are aspheric surface, and the face, image side of described 6th lens 160 is provided with a point of inflexion and a stationary point;
Described 7th lens 170 are negative lens, the thing side 172 of described 7th lens 170 is for concave surface and face, image side 174 changes into convex surface to periphery by concave surface by dipped beam axle, described 7th lens 170 are made up of plastic cement material, thing side 172 and the face, image side 174 of described 7th lens 170 are aspheric surface, and the thing side 172 of described 7th lens 170 is respectively arranged with a point of inflexion, the face, image side 174 of described 7th lens 170 is provided with at least one point of inflexion and at least one stationary point, in the present embodiment, the face, image side 174 of the 7th lens 170 is provided with two points of inflexion and a stationary point, in other embodiments, the point of inflexion and the stationary point of other quantity can be set as required.
Wherein, thing side is convex surface, refers to that thing side is formed as convex shape towards object; Thing side is concave surface, refers to that thing side forms the shape of depression towards object; Face, image side is convex surface, refers to that image side forms convex shape facing to image planes; Face, image side is concave surface, refers to that image side forms the shape of depression facing to image planes.
The focal power that described first lens 110 and described second lens 120 combine is approximately without focal power, rationally can correct spherical aberration, and aberration and the curvature of field can not be introduced, first lens 110 and described second lens 120 satisfy condition formula: f12 > 50mm or f12 <-50mm, wherein, the combined focal length of the f12: the first lens and the second lens.Described 4th lens 140 and described 5th lens 150 adopt the optical material of high index of refraction, low Abbe number, can effectively reduce system aberration, and described 7th lens 170 are negative-power lenses, can effectively reduce the system curvature of field.By the face type of reasonably optimizing seven lens, distribute focal power, select optical material, make described photographic optical system 1 can have good imaging performance under low-light (level).
Described photographic optical system 1 also comprises aperture 100 and glass plate 180, and described aperture 100 is located on the thing side 132 of described 3rd lens 130, for controlling light-inletting quantity and controlling the depth of field.The side, place, face, image side 174 of described 7th lens 170 is located at by described glass plate 180, and described glass plate 180 can be optical filtering, and it has the effect of filtering light, and its type can be selected according to the needs of actual conditions.The imaging surface 190 i.e. face of image objects, is positioned at the side of described glass plate 180 away from described 7th lens 170.
In photographic optical system provided by the invention, in order to realize the designing requirement of the miniaturization of described photographic optical system 1, high sensitivity, high optical property and Wide-angle, the first lens 110, second lens 120 of described photographic optical system 1, the 3rd lens 130, the 4th lens 140, the 5th lens 150, the 6th lens 160 and the following condition of the 7th lens 170 demand fulfillment:
One, focal length:
Under the unitary construction of described photographic optical system 1, the following condition of focal length demand fulfillment of the first lens 110, second lens 120 of described photographic optical system 1, the 3rd lens 130, the 4th lens 140, the 5th lens 150, the 6th lens 160 and the 7th lens 170:
30mm＜f1＜80mm，50mm＜f2＜100mm，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 ,-2.5 < f7/f <-0.4;
Wherein,
The focal length of the f1: the first lens;
The focal length of the f2: the second lens;
The focal length of the f3: the three lens;
The focal length of the f4: the four lens;
The focal length of the f5: the five lens;
The focal length of the f6: the six lens;
The focal length of the f7: the seven lens;
F: the focal length of whole described photographic optical system.
Two, refractive index
Under the unitary construction of described photographic optical system 1, the refractive index demand fulfillment condition of the first lens 110, second lens 120 of described photographic optical system 1, the 3rd lens 130, the 4th lens 140, the 5th lens 150, the 6th lens 160 and the 7th lens 170:
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,
The refractive index of the n1: the first lens;
The refractive index of the n2: the second lens;
The refractive index of the n3: the three lens;
The refractive index of the n4: the four lens;
The refractive index of the n5: the five lens;
The refractive index of the n6: the six lens;
The refractive index of the n7: the seven lens.
Three, Abbe number
Under the unitary construction of described photographic optical system 1, the Abbe number demand fulfillment condition of the first lens 110, second lens 120 of described photographic optical system 1, the 3rd lens 130, the 4th lens 140, the 5th lens 150, the 6th lens 160 and the 7th lens 170:
40＜v1＜60，40＜v2＜60，40＜v3＜60，15＜v4＜30，
15＜v5＜30，40＜v6＜60，40＜v7＜60，
Wherein
The Abbe number of the v1: the first lens;
The Abbe number of the v2: the second lens;
The Abbe number of the v3: the three lens;
The Abbe number of the v4: the four lens;
The Abbe number of the v5: the five lens;
The Abbe number of the v6: the six lens;
The Abbe number of the v7: the seven lens.
If the focal length of described first lens 110, described second lens 120, described 3rd lens 130, described 4th lens 140, described 5th lens 150, described 6th lens 160 and described 7th lens 170, refractive index and Abbe number do not meet above-mentioned condition, then the color aberration characteristics of described photographic optical system 1 and heart characteristic far away may deteriorations, and the susceptibility of described photographic optical system 1 can be increased, be difficult to the miniaturization and the Wide-angle that realize described photographic optical system 1, and be unfavorable for that described photographic optical system 1 reduces costs.
In the present embodiment, the data of the focal length of the first lens 110, second lens 120 of described photographic optical system 1, the 3rd lens 130, the 4th lens 140, the 5th lens 150, the 6th lens 160, the 7th lens 170 and glass plate 180, refractive index and Abbe number are as shown in table 1 below respectively:
The thing side of the first lens 110 (P1) of described photographic optical system 1, the second lens 120 (P2), the 3rd lens 130 (P3), the 4th lens 140 (P4), the 5th lens 150 (P5), the 6th lens 160 (P6) and the 7th lens 170 (P7) and the continuity in face, image side, radius-of-curvature, SAG and half bore SD data as shown in table 2:
Wherein
The radius-of-curvature of the thing side of the R11: the first lens P1;
The radius-of-curvature in the face, image side of the R12: the first lens P1;
The radius-of-curvature of the thing side of the R21: the second lens P2;
The radius-of-curvature in the face, image side of the R22: the second lens P2;
The radius-of-curvature of the thing side of the R31: the three lens P3;
The radius-of-curvature in the face, image side of the R32: the three lens P3;
The radius-of-curvature of the thing side of the R41: the four lens P4;
The radius-of-curvature in the face, image side of the R42: the four lens P4;
The radius-of-curvature of the thing side of the R51: the five lens P5;
The radius-of-curvature in the face, image side of the R52: the five lens P5;
The radius-of-curvature of the thing side of the R61: the six lens P6;
The radius-of-curvature in the face, image side of the R62: the six lens P6;
The radius-of-curvature of the thing side of the R71: the seven lens P7;
The radius-of-curvature in the face, image side of the R72: the seven lens P7;
The lens surface of SAG11 first lens is projected on the distance of optical axis position to the lens center of this thing side;
The lens surface of SAG12 first lens is projected on the distance of optical axis position to the lens center in this face, image side;
The lens surface of SAG21 second lens is projected on the distance of optical axis position to the lens center of this thing side;
The lens surface of SAG22 second lens is projected on the distance of optical axis position to the lens center in this face, image side;
The lens surface of SAG31 the 3rd lens is projected on the distance of optical axis position to the lens center of this thing side;
The lens surface of SAG32 the 3rd lens is projected on the distance of optical axis position to the lens center in this face, image side;
The lens surface of SAG41 the 4th lens is projected on the distance of optical axis position to the lens center of this thing side;
The lens surface of SAG42 the 4th lens is projected on the distance of optical axis position to the lens center in this face, image side;
The lens surface of SAG51 the 5th lens is projected on the distance of optical axis position to the lens center of this thing side;
The lens surface of SAG52 the 5th lens is projected on the distance of optical axis position to the lens center in this face, image side;
The lens surface of SAG61 the 6th lens is projected on the distance of optical axis position to the lens center of this thing side;
The lens surface of SAG62 the 6th lens is projected on the distance of optical axis position to the lens center in this face, image side;
The lens surface of SAG71 the 7th lens is projected on the distance of optical axis position to the lens center of this thing side;
The lens surface of SAG72 the 7th lens is projected on the distance of optical axis position to the lens center in this face, image side.
The thickness of the first lens 110 (P1) of described photographic optical system 1, the second lens 120 (P2), aperture 100 (ST) the 3rd lens 130 (P3), the 4th lens 140 (P4), the 5th lens 150 (P5), the 6th lens 160 (P6), the 7th lens 170 (P7) and glass plate 180 (Tg) is as shown in table 3:
Wherein,
The thickness of the T1: the first lens;
The face, image side of the T12: the first lens and the spacing distance of thing side on optical axis of the second lens;
The thickness of the T2: the second lens;
ST: the thickness of aperture;
T23: the spacing distance of thing side on optical axis of aperture and the 3rd lens;
The thickness of the T3: the three lens;
The face, image side of the T34: the three lens and the spacing distance of thing side on optical axis of the 4th lens;
The thickness of the T4: the four lens;
The image side of the T45: the four lens and the spacing distance of the 5th lens on optical axis;
The thickness of the T5: the five lens;
T56: the five lens and the spacing distance of the 6th lens on optical axis;
The thickness of the T6: the six lens;
T67: the six lens and the spacing distance of the 7th lens on optical axis;
The thickness of the T7: the seven lens.
In the present embodiment, DFOV=78.00 °, HFOV=62.40 °, VFOV=46.80 °, wherein FOV is defined as maximum field of view's angular region of described photographic optical system, and HFOV is defined as horizontal field of view angle, DFOV is defined as diagonal line field angle, and VFOV is defined as vertical field of view angle.
Please refer to Fig. 2, Fig. 3 and Fig. 4, wherein Fig. 2 is the MTF curve map of photographic optical system shown in Fig. 1, and Fig. 3 is the curvature of field curve map of photographic optical system shown in Fig. 1, and Fig. 4 is the distortion curve figure of photographic optical system shown in Fig. 1.As shown in Figure 2, Figure 3 and Figure 4, described photographic optical system 1 provided by the invention has higher optical property.
In addition, in photographic optical system 1 provided by the invention, described photographic optical system 1 designs based on the optical system of object lens of large relative aperture, and its optics overall length is less than 5.5mm, and field angle is between 78 ° to 88 °.
Photographic optical system 1 provided by the invention has following beneficial effect:
The present invention, by reasonably optimizing face type, distribution focal power, selection optical material, devises object lens of large relative aperture photographic optical system, can provide the imaging performance under low-light (level) environment, imaging clearly; The combined light focal power of described first lens 110 and described second lens 120 is approximately without focal power mirror group, rationally can correct spherical aberration, and can not introduce aberration and the curvature of field; Described 4th lens 140 and described 5th lens 150 adopt the material of high index of refraction, low Abbe number, can effectively reduce system aberration; Described 7th lens 170 can effectively reduce the system curvature of field for negative-power lenses.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a photographic optical system, it is characterized in that, be followed successively by image side from thing side: coaxial the first lens, the second lens, the 3rd lens, the 4th lens, the 5th lens, the 6th lens and the 7th lens arranged, and satisfy the following conditional expression (1) ~ (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,
The focal length of the f1: the first lens;
The focal length of the f2: the second lens;
The focal length of the f3: the three lens;
The focal length of the f4: the four lens;
The focal length of the f5: the five lens;
The focal length of the f6: the six lens;
The focal length of the f7: the seven lens;
F: the focal length of whole described photographic optical system.
2. photographic optical system according to claim 1, is characterized in that, described photographic optical system also satisfies the following conditional expression (1a) ~ (7a):
30mm＜f1＜80mm(1a)；
50mm＜f2＜100mm(2a)；
2mm＜f3＜5mm(3a)；
-10mm＜f4＜-2mm(4a)；
-30mm＜f5＜-10mm(5a)；
1mm＜f6＜5mm(6a)；
-5mm＜f7＜-1.5mm(7a)。
3. photographic optical system according to claim 1, is characterized in that, described photographic optical system also satisfies the following conditional expression (1b) ~ (7b):
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,
The refractive index of the n1: the first lens;
The refractive index of the n2: the second lens;
The refractive index of the n3: the three lens;
The refractive index of the n4: the four lens;
The refractive index of the n5: the five lens;
The refractive index of the n6: the six lens;
The refractive index of the n7: the seven lens.
4. photographic optical system according to claim 1, is characterized in that, described photographic optical system also satisfies the following conditional expression (1c) ~ (7c):
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,
The Abbe number of the v1: the first lens;
The Abbe number of the v2: the second lens;
The Abbe number of the v3: the three lens;
The Abbe number of the v4: the four lens;
The Abbe number of the v5: the five lens;
The Abbe number of the v6: the six lens;
The Abbe number of the v7: the seven lens.
5. photographic optical system according to claim 1, is characterized in that, described first lens and described second lens satisfy the following conditional expression:
F12 > 50mm or f12 <-50mm;
Wherein,
The combined focal length of the f12: the first lens and the second lens.
6. photographic optical system according to claim 2, is characterized in that, described first lens are positive lens, and the thing side of described first lens is convex surface.
7. photographic optical system according to claim 2, is characterized in that, described 7th lens are negative lens.
8. photographic optical system according to claim 1, is characterized in that, described photographic optical system also satisfies the following conditional expression:
TTL＜5.5mm；
78°＜FOV＜88°；
Wherein,
TTL: the distance from the thing side of described first lens to imaging surface;
FOV: maximum field of view's angular region that described photographic optical system photographs.
9. photographic optical system according to claim 7, is characterized in that, the image side mask of described 7th lens has at least one point of inflexion and at least one stationary point.
10. photographic optical system according to claim 1, is characterized in that, described photographic optical system comprise further be arranged at described 3rd lens thing side on aperture.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
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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 |
| US15/353,959 US9874723B2 (en) | 2015-12-24 | 2016-11-17 | Photographic optical system |
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| CN201510982115.XA CN105388592B (en) | 2015-12-24 | 2015-12-24 | Photographic optical system |
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| CN105388592B CN105388592B (en) | 2018-07-06 |
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| Publication number | Publication date |
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| CN105388592B (en) | 2018-07-06 |
| JP2017116912A (en) | 2017-06-29 |
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