CN112955803A - Optical system and imaging device - Google Patents
Optical system and imaging device Download PDFInfo
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- CN112955803A CN112955803A CN201980067392.4A CN201980067392A CN112955803A CN 112955803 A CN112955803 A CN 112955803A CN 201980067392 A CN201980067392 A CN 201980067392A CN 112955803 A CN112955803 A CN 112955803A
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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
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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
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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
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
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Abstract
An optical system and an imaging device, the optical system (10) comprising: the zoom lens comprises a first lens group (1), a second lens group (2) and a third lens group (3) which are arranged in sequence from an object side to an image side, wherein the first lens group (1) and the second lens group (2) both have positive focal power, and the third lens group (3) has negative focal power; the optical system (10) satisfies: 0.85<|f1/f|<4.5，0.5<|f2/f|<1.5，3<|f3/f|<10，1<|TL/f|<1.5，0<|T1/T2|<0.5，0<|T3/T2|<0.5; wherein, f1、f2、f3Is the focal length; TL, T1、T2、T3The distance between the lens group, the diaphragm and the imaging surface.
Description
Technical Field
The present application relates to the field of optical technologies, and in particular, to an optical system and a photographing apparatus.
Background
With the improvement of the living standard of materials, the demand of people for the camera to shoot is gradually improved, the standard fixed focus lens of the single lens reflex is always pursued by shooting enthusiasts and professional photographers, the existing fixed focus lens mostly adopts a double-gauss optical structure, the length of a lens optical system is longer, the weight is heavier, the size is larger, the focusing speed is slower, the price is higher, the imaging surface is smaller, the imaging quality is poorer, and the like.
Disclosure of Invention
Based on this, this application provides an optical system and image capture device.
In a first aspect, the present application provides an optical system comprising, in order from an object side to an image side, a first lens group, a second lens group, and a third lens group, the first lens group and the second lens group each having positive power, the third lens group having negative power;
the optical system satisfies the following conditions: 0.85<|f1/f|<4.5，0.5<|f2/f|<1.5，3<|f3/f|<10，1<|TL/f|<1.5，0<|T1/T2|<0.5，0<|T3/T2|<0.5, wherein f1、f2、f3Respectively showing the focal lengths of the first lens group, the second lens group and the third lens group, f showing the focal length of the optical system in the infinite focusing, TL showing the distance from the central peak of the lens surface closest to the object side of the first lens group to the imaging surface, and T1Denotes a distance T from a central vertex of a lens surface closest to the object side of the first lens group to the stop2Denotes a distance T from a stop surface to a center vertex of a lens surface closest to the object side of the third lens group3And represents a distance from a center vertex of a lens surface closest to the object side in the third lens group to a vertex of a lens surface closest to the image side in the third lens group.
In a second aspect, the present application provides a photographing apparatus including an optical system and a photographing device, the optical system being connected to the photographing device, the optical system including a first lens group, a second lens group, and a third lens group arranged in order from an object side to an image side, the first lens group and the second lens group each having positive power, the third lens group having negative power;
the optical system satisfies the following conditions: 0.85<|f1/f|<4.5，0.5<|f2/f|<1.5，3<|f3/f|<10，1<|TL/f|<1.5，0<|T1/T2|<0.5，0<|T3/T2|<0.5, wherein f1、f2、f3Respectively showing the focal lengths of the first lens group, the second lens group and the third lens group, f showing the focal length of the optical system in the infinite focusing, TL showing the distance from the central peak of the lens surface closest to the object side of the first lens group to the imaging surface, and T1Denotes a distance T from a central vertex of a lens surface closest to the object side of the first lens group to the stop2Denotes a distance T from a stop surface to a center vertex of a lens surface closest to the object side of the third lens group3And represents a distance from a center vertex of a lens surface closest to the object side in the third lens group to a vertex of a lens surface closest to the image side in the third lens group.
The embodiment of the application provides an optical system and a shooting device, wherein the optical system comprises a first lens group, a second lens group and a third lens group which are arranged in sequence from an object side to an image side, the first lens group and the second lens group both have positive focal power, and the third lens group has negative focal power; the optical system satisfies the following conditions: 0.85<|f1/f|<4.5，0.5<|f2/f|<1.5，3<|f3/f|<10，1<|TL/f|<1.5，0<|T1/T2|<0.5，0<|T3/T2|<0.5, wherein f1、f2、f3Respectively showing the focal lengths of the first lens group, the second lens group and the third lens group, f showing the focal length of the optical system in the infinite focusing, TL showing the distance from the central peak of the lens surface closest to the object side of the first lens group to the imaging surface, and T1Denotes a distance T from a central vertex of a lens surface closest to the object side of the first lens group to the stop2Denotes a distance T from a stop surface to a center vertex of a lens surface closest to the object side of the third lens group3Representing from a central vertex of a lens surface closest to the object side in the third lens group to a vertex of a lens surface closest to the image side in the third lens groupDistance. The combination of the optical system structure can reduce the integral aberration of the optical system and provide support for ensuring the imaging quality; the overall length can be made shorter to provide support for reduced volume (miniaturization), since a shorter overall length may generally require a reduced number of lenses to provide support for reduced weight (lightness), and as the number of lenses is reduced, the number of lenses used for focusing may also be reduced to provide support for increased focusing speed, and the inner focusing structure can provide support for reduced breathing effects; the imaging can be realized more clearly even if the field of view is marginal.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of an optical system of the present application;
FIG. 2 is a schematic diagram of another embodiment of an optical system according to the present application;
FIG. 3 is a schematic diagram of an optical system according to another embodiment of the present application;
fig. 4 is a schematic structural diagram of an embodiment of a camera according to the present application.
Description of the main elements and symbols:
10. an optical system;
1. a first lens group; 2. a second lens group; 3. a third lens group; 4. a diaphragm; 5. an imaging plane;
11. a first lens; 12. a second lens; 21. a third lens; 22. a fourth lens; 23. a fifth lens; 24. a sixth lens; 31. a seventh lens; 32. an eighth lens;
40. a photographing device; 41. a photographing apparatus.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. 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 application.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1, fig. 1 is a schematic diagram of a structure of an embodiment of an optical system of the present application. The optical system 10 includes a first lens group 1, a second lens group 2, and a third lens group 3 arranged in this order from an object side (left side, i.e., object side) to an image side (right side, i.e., image side) along an optical axis Z, the first lens group 1 and the second lens group 2 each having positive power, and the third lens group 3 having negative power.
The focal power (focal power) is equal to the difference between the image and object beam convergence, and characterizes the ability of the optical system to deflect light rays, often using letters
Expressed in diopters (diopters). When the incident light beam is a parallel light beam, the focal power represents the refractive power of the optical system to the incident parallel light beam;
the larger the value of (b), the more the parallel beam is deflected;
when, the flexion is convergent;
when, the flexion is divergent;
in the process, the light beam is plane refraction, namely the light beam parallel to the axis is still the light beam parallel to the axis after being refracted, and the refraction phenomenon does not occur.
The optical system 10 satisfies the following conditions: 0.85<|f1/f|<4.5，0.5<|f2/f|<1.5，3<|f3/f|<10，1<|TL/f|<1.5，0<|T1/T2|<0.5，0<|T3/T2|<0.5, wherein f1、f2、f3Denotes a focal length of each of the first lens group 1, the second lens group 2, and the third lens group 3, f denotes a focal length of the optical system 10 at the time of infinity focusing, TL denotes a distance on an optical axis Z from a center vertex a of a lens surface closest to the object side of the first lens group 1 to the image forming surface 5, and T denotes a distance1Denotes the distance, T, from the central vertex A of the lens surface closest to the object side of the first lens group 1 to the diaphragm 42Denotes the distance, T, from the stop surface 4 to the center vertex B of the lens surface of the third lens group 3 closest to the object side3Denotes a distance from a central vertex B of a lens surface closest to the object side in the third lens group 3 to a central vertex C of a lens surface closest to the image side in the third lens group 3.
In the optical system 10, focusing may be performed by using the first lens group 1, the second lens group 2, or the third lens group 3.
The optical system 10 is characterized in that 1<|TL/f|<1.5, the length of the entire optical system can be reduced. T is1、T2、T3Relation 0 between<|T1/T2|<0.5 and 0<|T1/T2/T2|<0.5 allows a sufficient focusing space for focusing with the second lens group 2.
The optical system 10 can be designed to be more compact in structure by designing the distance and the pitch, thereby further contributing to miniaturization and lightness of the whole optical system and improving the imaging quality of the optical system.
The combination of the above structures of the optical system 10 in the embodiment of the present application can reduce the overall aberration of the optical system 10, and provide support for ensuring the imaging quality; since the shorter overall length may generally require a reduction in the number of lenses, which can provide support for weight reduction (lightening), and when the number of lenses is reduced, the number of lenses for focusing employed may also be reduced, which can provide support for increasing the focusing speed, and since the combination of the above structures provides support for the inner focusing structure, which can provide support for reducing the breathing effect; the imaging can be realized more clearly even if the field of view is marginal.
Since the focusing system length can be kept constant when focusing is performed using the second lens group 2 (i.e., the inner focusing mode), in an embodiment, the second lens group 2 is moved from the object side to the image side along the optical axis Z in a state where the first lens group 1 and the third lens group 3 are fixed with respect to the imaging surface 5, thereby achieving focusing of the closest distance object to the infinity object.
The optical system 10 includes at least eight lenses, namely, a first lens 11, a second lens 12, a third lens 21, a fourth lens 22, a fifth lens 23, a sixth lens 24, a seventh lens 31, and an eighth lens 32 in order from the object side to the image side; the first lens group 1 includes a first lens 11 and a second lens 12, the second lens group 2 includes a third lens 21, a fourth lens 22, a fifth lens 23, and a sixth lens 24, and the third lens group 3 includes at least one or more lenses including a seventh lens 31.
Because the number of lenses of the optical system 10 of the embodiment is greater than or equal to eight, the number of lenses (10 lenses and more) is smaller than that of the existing single lens reflex fixed-focus lens with the same type and similar parameters, the weight can be reduced by the method, and the cost can be lower, so that the corresponding lens can be developed towards light weight; especially when the number of lenses of the optical system 10 is equal to eight, more weight can be reduced, further reducing the cost; and the second lens group 4 includes 4 lenses, the number of lenses for focusing is reduced so much that the focusing speed can be improved. In addition, since the second lens group 2 is used for internal focusing, the distance (focusing amount) moved during focusing is shortened, and the breathing effect can be reduced.
In an embodiment, at least one of the first lens group 1, the second lens group 2 and the third lens group 3 includes a plastic lens. That is, the first lens group 1, the second lens group 2 and the third lens group 3 may be partially made of glass lens and other common material lenses, and partially made of plastic lens; or all plastic lenses. In this way, the weight of the optical system 10 can be further reduced, and the optical system 10 can be reduced in weight for the convenience of users.
In another embodiment, all the lenses in the first lens group 1, the second lens group 2 and the third lens group 3 are glass lenses. And the glass lens is adopted, so that the optical quality and the imaging effect are better.
The aspherical lens is a lens whose curvature varies continuously from the center to the edge to improve the optical quality (for example, to avoid spherical aberration, chromatic aberration and distortion, etc.), and is a replacement of the spherical lens, which has the most significant advantage of correcting the spherical aberration of the spherical lens in the collimating and focusing system. By adjusting the surface constant and the aspheric coefficient, the aspheric lens can eliminate the spherical aberration to the maximum extent. The optical quality that the combination of multi-disc (more than two) lens can realize, often one or two aspherical lens just can realize similar or better optical quality, adopt aspherical lens can reduce optical element to reduce system size can reduce the comprehensive cost of system, also be convenient for process. The optical system of the present embodiment includes an aspherical lens, and the contents of the optical system of the present embodiment with respect to the aspherical lens will be described below.
In an embodiment, the first lens group 1 and the second lens group 2 include at least one aspheric lens.
In the first case: the first lens group 1 includes at least one aspheric lens. The second lens 12 of the first lens group 1 is an aspherical lens. At least one surface of the second lens 12 is aspherical.
In the second case: the second lens group 2 includes at least one aspherical lens. The second lens group 2 includes at least one aspherical lens. The second lens group 2 includes at least one aspherical lens having at least one aspherical surface.
In the third case: the first lens group 1 and the second lens group 2 include two aspherical lenses. The aspherical surfaces of the two aspherical lenses are high-order aspherical surfaces. The high-order aspherical surface satisfies the following expression:
wherein z is an aspheric rotational symmetry axis, and c is a vertex curvature; y is a radial coordinate, and the unit of the radial coordinate is the same as the unit length of the lens; k is a conic constant, a1To a8Each representing a coefficient corresponding to each radial coordinate.
In one embodiment, the aspheric surface of the aspheric lens is disposed on the lens surface with a smaller aperture. By the mode, the aberration of the optical system can be well corrected, and meanwhile, the processing cost of the lens is favorably reduced.
Details of the first lens group 1 are described in detail below.
In one embodiment, to improve the imaging quality, the first lens 11 is a negative lens, and the following condition is satisfied: 0.5<|f11/f|<2.5，0<|f12/f11|<1, wherein f11Denotes the focal length, f, of the first lens 11 of the first lens group 112The focal length of the second lens 12 of the first lens group 1 is indicated.
The negative lens is called a concave lens, and the middle of the lens is thin, the edge of the lens is thick and is concave; concave lenses have a diverging effect on light, for example in the form of biconcave lenses, plano-concave lenses, convex-concave lenses, etc. In the present embodiment, the first lens 11 is a negative lens, and the function of the negative lens is to make the incident light smoother without a particularly large turn. The first lens group 1 composed of the first lens 11 and the second lens 12 has positive power. Due to 0.5<|f11/f|<2.5，0<|f12/f11|<1, the optical system 10 can have better image quality.
In an embodiment, to further shorten the length of the optical system 10, the stop 4 is disposed at a position relatively forward, as close to the object side as possible, i.e., the first lens 11 and the second lens 12 of the first lens group 1 are both disposed between the object side and the stop 4, and the first lens 11 and the second lens 12 are both disposed before the stop 4.
In an embodiment, in order to improve the imaging quality, the first lens group 1 satisfies the following condition: (vd)11，vd12)>40，1.4<nd11<1.6，1.5<nd12<2; wherein vd11、vd12The abbe numbers of the first lens 11 and the second lens 12 are respectively shown; nd11、nd12The refractive indices of the first lens 11 and the second lens 12 are shown, respectively.
Details of the first lens group 2 are described in detail below.
In an embodiment, in order to enable the internal focusing optical system to better realize focusing from infinity to closest distance and ensure better imaging effect under the condition of focusing from infinity and closest distance, the second lens group 2 has better image quality, and consists of four single lenses and at least comprises more than one positive lens and more than one negative lens. The second lens group 2 includes at least one set of double cemented lenses. The third lens 21 and the fourth lens 22 of the second lens group 2 are double cemented lenses 20, and the fifth lens 23 and the sixth lens 24 of the second lens group 2 are single lenses, respectively. The second lens group 2 satisfies the following conditions: 0<|f20/f2|<1，0.25<|f23/f2|<2.5，0<|f24/f2|<1, wherein f20Denotes the overall focal length, f, of the doublet 20 in the second lens group 223Denotes the focal length, f, of the fifth lens 23 in the second lens group 224The focal length of the sixth lens 24 in the second lens group 2 is indicated.
In an embodiment, in order to improve the imaging quality, the second lens group 2 satisfies the following condition: (vd)21，vd23，vd24)>40，0<vd22<40，1.4<nd24<1.6，1.5<(nd21，nd22，nd23)<2; wherein vd21、vd22、vd23、vd24The colors of the third lens 21, the fourth lens 22, the fifth lens 23 and the sixth lens 24 are shown respectivelyA coefficient of dispersion; nd21、nd22、nd23、nd24The refractive indices of the third lens 21, the fourth lens 22, the fifth lens 23, and the sixth lens 24 are shown, respectively. Further, the second lens group 2 satisfies the following condition: 0<vd22<35，nd22>1.6，vd24>81，nd24<1.5。
The second lens group 2 in the optical system adopting the inner focusing mode is used as an inner focusing group, at least comprises an ultra-low dispersion lens (a fourth lens 22) and an ultra-high dispersion lens (a sixth lens 24), and further comprises at least one aspheric surface, and the use of the positive lens, the negative lens and the aspheric surface of the inner focusing group can well control the aberration caused in the moving process of the inner focusing group, thereby improving the optical image quality of the whole system; and the overall focusing amount (i.e. the distance moved by the inner focusing group when focusing from the object at infinity to the closest distance) is small (e.g. the focusing amount may be less than 3mm), and the breathing effect is weak (e.g. may be less than 10%).
Details of the third lens group 3 are described in detail below.
In an embodiment, the third lens group 3 further includes an eighth lens.
In order to improve the imaging quality, the third lens group 3 includes at least one positive lens and one negative lens, and the following conditions are satisfied: 0<|f31/f3|<0.5，0<|f32/f3|<0.5, wherein f31Denotes the focal length, f, of the seventh lens 31 in the third lens group 332The focal length of the eighth lens 32 in the third lens group 3 is indicated.
And the image side surfaces of the seventh lens and the eighth lens in the third lens group are both bent towards the object side. This saves space for the connection between the sensor and the bayonet.
In an embodiment, to improve the imaging quality, the third lens group 3 satisfies the following condition: 0<vd32<40，30<vd31<60，1.5<(nd31，nd32)<2; wherein vd31、vd32The abbe numbers of the seventh lens 31 and the eighth lens 32 are shown, respectively; nd31、nd32The refractive indices of the seventh lens 31 and the eighth lens 32 are shown, respectively. Further, the third lens group 3 satisfies the following condition: 0<vd32<35，nd32>1.85。
The inner focusing group may be focused by one lens or several lenses, and not only the second lens group 2, but also the second lens 12 in the first lens group 1, the seventh lens 31 or the eighth lens 32 in the third lens group 3, or the seventh lens 31 or the eighth lens 32 in the third lens group 3 may be focused as a group.
The following provides specific numerical configurations of the optical system in two practical applications, in conjunction with the drawings and the tables. Referring to fig. 2 and 3 and tables 1 to 6, the numbers of surfaces 1, 2,. and 16 in the tables represent surface numbers in the optical system, and respectively represent mirror surfaces of the first lens 11 (the numbers of surfaces 1 and 2), the second lens 12 (the numbers of surfaces 3 and 4), the stop 4 (stop, the number of surfaces 5), the third lens 21, and the fourth lens 22 (collectively, double cemented lenses, the numbers of surfaces 6, 7, and 8, in which the cemented surfaces of the two lenses count up to one surface 7), the fifth lens 23 (the numbers of surfaces 9 and 10), the sixth lens 24 (the numbers of surfaces 11 and 12), the seventh lens 31 (the numbers of surfaces 13 and 14), and the eighth lens 32 (the numbers of surfaces 15 and 16).
In tables 1 and 4, the radius of curvature R (radius) represents the degree of curvature of the lens surface, and the smaller the value of R, the more curved the lens surface; a spacing or Thickness (Thick) that represents the lens Thickness when the Nd and Vd behind surfaces have a value, and represents the distance between the lens and the optic when the Nd and Vd behind surfaces have no value; the refractive index nd (reactive index) of the lens is the ratio of the propagation speed of light in vacuum to the propagation speed of light in the lens, the higher the refractive index of the lens is, the stronger the incident light refracting power is, the higher the refractive index is, the thinner the lens is, namely, the center thickness of the lens is the same, the same material with the same degree of power, and the edge of the lens with the higher refractive index is thinner than the edge of the lens with the lower refractive index; the abbe number vd (abbe number), also called dispersion coefficient, of the lens is used to measure the degree of light dispersion of the lens, and the larger the degree of light dispersion, the smaller the abbe number is, the poorer the imaging definition is, and conversely, the smaller the degree of light dispersion, the larger the abbe number is. In general, the larger the refractive index of the material, the more chromatic dispersion, i.e., the lower the Abbe's number. "Infinity" means a plane.
In tables 2 and 5, k is a conic constant, a1To a8Each representing a coefficient corresponding to each radial coordinate. Tables 3 and 6 show data of a focal length, an image F-number (diaphragm F-number), and a movement variation amount of the inner focus group corresponding to focusing from an infinite object distance to a closest distance; the variation of the movement of the inner focusing set is the absolute value of the difference between the infinity distance and the closest distance of CT (5) and CT (12).
Wherein tables 1 to 3 are specific numerical configurations of the optical system of fig. 2; tables 4 to 6 are specific numerical configurations of the optical system of fig. 3. As can be seen from table 3, the inner focus movement amounts are the same (the third lens 21, the fourth lens 22, the fifth lens 23, and the sixth lens 24 of the second lens group 2 move together at the same time, and the front and rear movement amounts are the same, that is, 4.438-1.55 is 6.276-3.388 is 2.888).
As can be seen from table 6, the amount of the inner focusing movement changes (the first lens 11 and the second lens 12 of the first lens group 1 move together, and the third lens 21, the fourth lens 22, the fifth lens 23, and the sixth lens 24 of the second lens group 2 move together at the same time, i.e., the movement steps of the first lens group 1 and the second lens group are not consistent, and CT (5) and CT (12) do not have the same movement amount at infinity and at the closest distance, i.e., (2.962-2.508 ═ 0.454) ≠ (9.54-6.438 ≠ 3.102).
TABLE 1 data of the respective surface parameters of the first optical system
TABLE 2 aspheric parameter data of each surface of the first optical system
| Number of noodles | k | a1 | a2 | a3 | a4 | a5 | a6 | a7 | a8 |
| 3 | 0.517 | 0 | 5.00201E-05 | 4.98453E-08 | 5.19056E-08 | -1.09155E-09 | 1.59864E-11 | 0 | 0 |
| 4 | 3.850 | 0 | -1.77016E-05 | -1.12682E-06 | -2.47923E-08 | 2.04561E-09 | -1.08898E-10 | 0 | 0 |
| 9 | 5.484 | 0 | 0.000100688 | 2.00000E-06 | -3.24556E-08 | 1.28740E-09 | -1.94968E-11 | 0 | 0 |
| 10 | -0.996 | 0 | 2.31595E-05 | 3.85311E-07 | 2.11654E-09 | 6.48403E-11 | -5.88468E-13 | 0 | 0 |
TABLE 3 first optical system lens group configuration data
| Infinity | Minimum distance | |
| Focal length | 46.14mm | |
| Square F Number (FNO) | 4.09 | 4.23 |
| CT(5) | 4.438 | 1.550 |
| CT(12) | 3.388 | 6.276 |
TABLE 4 data of the respective surface parameters of the second optical system
TABLE 5 aspheric parameter data of each surface of the second optical system
| Number of noodles | k | a1 | a2 | a3 | a4 | a5 | a6 | a7 | a8 |
| 3 | 0 | 0 | 2.30943E-05 | 5.29169E-07 | 2.87403E-08 | -6.40324E-10 | 1.56278E-11 | 0 | 0 |
| 4 | 0 | 0 | 7.67008E-05 | 5.13974E-07 | 6.26556E-08 | -1.71798E-09 | 3.80315E-11 | 0 | 0 |
| 9 | 0 | 0 | 1.47094E-04 | 1.44662E-06 | 4.94900E-09 | -4.21743E-10 | 1.74006E-12 | 0 | 0 |
| 10 | 0 | 0 | 1.44193E-04 | 1.30949E-06 | 1.19090E-08 | -2.22213E-10 | -1.24681E-13 | 0 | 0 |
TABLE 6 lens group arrangement data of the second optical system
| Infinity | Minimum distance | |
| Focal length | 45.31 | |
| Square F Number (FNO) | 4.15 | 4.36 |
| CT(5) | 2.962 | 2.508 |
| CT(12) | 6.438 | 9.540 |
In summary, the optical system of the embodiment of the present application described above has the following advantages:
1. the optical system of the internal focusing system described in the embodiment of the present application has a compact structure, and adopts a structure in which the position of the diaphragm is as close to the object side as possible, so that the total length of the optical system is shortened (the total length of the entire internal focusing optical system (the distance from the vertex of the object side surface of the first lens 11 to the image plane) can be less than 60mm, and the entire lens system (the distance from the vertex of the object side surface of the first lens 11 to the vertex of the image side surface of the eighth lens 32) can be less than 46mm, thereby achieving miniaturization, light weight and portability;
2. the optical system of the internal focusing mode in the embodiment of the application adopts at least one lens for internal focusing as the focusing mode, so that the overall focusing weight of the system is lighter (the weight of a focusing group is less than 14g, and the weight of the focusing group refers to the weight of all lenses of the focusing group), and the focusing speed is higher;
3. the optical system of the internal focusing mode is small in focusing amount, the integral focusing amount is less than 3mm, and the respiratory effect of the system is small (less than 10%);
4. the optical system can be used for a photographic optical system, can realize a large shooting range and clear imaging of a single lens reflex system, and can realize shooting of different object distances from 0.5m to infinity;
5. on the basis of satisfying all the above-mentioned conditions, the optical system of the embodiment of the present application, in still another embodiment, can perform focusing by moving the first lens group 1 and the second lens group 2 toward the object side simultaneously according to different object distances, in which case, the focusing amount of the optical system is less than 3.5mm, and the respiratory effect caused by focusing is less than 8%; the total length of the whole internal focusing optical system (the distance from the vertex of the object side surface of the first lens to the image plane) can be less than 58mm, and the whole lens system (the distance from the vertex of the object side surface of the first lens to the vertex of the image side surface of the eighth lens) can be less than 40 mm; when the optical system adopting the internal focusing mode adopts the first lens group 1 and the second lens group 2 to focus simultaneously, the overall focusing weight is still less than 14g, and quick focusing can be realized.
Referring to fig. 4, fig. 4 is a schematic structural diagram of an embodiment of the photographing device of the present application. The photographing device 40 includes an optical system 10 and a photographing apparatus 41, the optical system 10 is connected to the photographing apparatus 41, the optical system 10 adopts an optical system as described above, and includes a first lens group 1, a second lens group 2 and a third lens group 3, which are arranged in sequence from an object side to an image side, and a detailed description of relevant contents refers to the above optical system parts, which are not described in detail herein.
The shooting device 40 is an electronic device capable of shooting, and includes a single lens reflex camera, a digital camera, a motion camera, a pan/tilt camera, or the like.
Wherein the optical system 10 and the photographing apparatus 41 are detachably connected or fixedly connected. The detachable connection is convenient for users to use.
In one embodiment, the optical system 10 and the photographing device 41 are fixed by one or more of magnetic attraction, adhesion, screw thread, or snap connection. Taking a snap as an example, when the optical system 10 and the shooting device 41 are fixed by the snap, the optical system 10 and the shooting device 41 are connected by a male-female snap, specifically, a male snap can be installed on the optical system 10, and a female snap for the male snap to be snapped is installed at a corresponding position of the shooting device 41. Vice versa, the male buckle can also be installed on the shooting device 41, and the female buckle for the male buckle to buckle is installed on the optical system 10. Through the above arrangement, on the one hand, the optical system 10 is convenient for users to use, and on the other hand, the optical system 10 and the shooting device 41 can be prevented from falling off, so that the firmness of connection between the optical system 10 and the shooting device 41 is increased.
The optical system 10 includes a first lens group, a second lens group, and a third lens group, which are arranged in order from an object side to an image side, the first lens group and the second lens group each having positive power, the third lens group having negative power; the optical system satisfies the following conditions: 0.85<|f1/f|<4.5，0.5<|f2/f|<1.5，3<|f3/f|<10，1<|TL/f|<1.5，0<|T1/T2|<0.5，0<|T3/T2|<0.5, wherein f1、f2、f3Respectively showing the focal lengths of the first lens group, the second lens group and the third lens group, f showing the focal length of the optical system at the time of infinity focusing, TL showing the distance on the optical axis from the center vertex of the lens surface closest to the object side of the first lens group to the image forming surface, T1Denotes a distance T from a central vertex of a lens surface closest to the object side of the first lens group to the stop2Denotes the distance from the stop surface to the central vertex of the lens surface closest to the object side of the third lens group, T3Denotes a distance from a center vertex of a lens surface closest to the object side in the third lens group to a center vertex of a lens surface closest to the image side in the third lens group.
Wherein the first lens group and the third lens group are fixed with respect to an imaging surface such that the second lens group moves from the object side to the image side along the optical axis.
The optical system is provided with at least eight lenses from an object side to an image side, wherein the eight lenses are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens in sequence; the first lens group includes a first lens and a second lens, the second lens group includes a third lens, a fourth lens, a fifth lens and a sixth lens, and the third lens group includes at least one or more lenses including a seventh lens.
The first lens group and the second lens group at least comprise an aspheric lens.
Wherein, the first lens is a negative lens and satisfies the following conditions: 0.5<|f11/f|<2.5，0<|f12/f11|<1, wherein f11Denotes a focal length of a first lens of the first lens group, f12Denotes a focal length of the second lens of the first lens group.
The second lens of the first lens group is an aspheric lens.
Wherein at least one surface of the second lens is aspheric.
Wherein the first lens and the second lens of the first lens group are both disposed between the object side and the diaphragm.
The second lens group at least comprises more than one positive lens and more than one negative lens.
Wherein the second lens group at least comprises a group of double cemented lenses.
The third lens and the fourth lens of the second lens group are double-cemented lenses, and the fifth lens and the sixth lens of the second lens group are single lenses respectively.
Wherein the second lens group satisfies the following condition: 0<|f20/f2|<1，0.25<|f23/f2|<2.5，0<|f24/f2|<1, wherein f20Denotes the overall focal length of the cemented doublet in the second lens group, f23Denotes the focal length of the fifth lens in the second lens group, f24Denotes a focal length of the sixth lens in the second lens group.
The second lens group at least comprises an aspheric lens.
Wherein, the second lens group at least comprises an aspheric lens with at least one aspheric surface.
The aspherical surface of the aspherical lens is arranged on a lens surface with a small aperture.
The third lens group further comprises an eighth lens, the third lens group at least comprises a positive lens and a negative lens, and the following conditions are met: 0<|f31/f3|<0.5，0<|f32/f3|<0.5, wherein f31Denotes a focal length of a seventh lens in the third lens group, f32Denotes a focal length of the eighth lens in the third lens group.
And the image side surfaces of the seventh lens and the eighth lens in the third lens group are both bent towards the object side.
Wherein the first lens group satisfies the following condition: (vd)11，vd12)>40，1.4<nd11<1.6，1.5<nd12<2; wherein vd11、vd12Respectively representing the dispersion coefficients of the first lens and the second lens; nd11、nd12Respectively, the refractive indices of the first lens and the second lens.
Wherein the second lens group satisfies the following condition: (vd)21，vd23，vd24)>40，0<vd22<40，1.4<nd24<1.6，1.5<(nd21，nd22，nd23)<2; wherein vd21、vd22、vd23、vd24Respectively representing the dispersion coefficients of a third lens, a fourth lens, a fifth lens and a sixth lens; nd21、nd22、nd23、nd24The refractive indexes of the third lens, the fourth lens, the fifth lens and the sixth lens are respectively shown.
Wherein the second lens group satisfies the following condition: 0<vd22<35，nd22>1.6，vd24>81，nd24<1.5。
Wherein the third lens group satisfies the following condition: 0<vd32<40，30<vd31<60，1.5<(nd31，nd32)<2; wherein vd31、vd32Respectively showing the dispersion coefficients of the seventh lens and the eighth lens; nd31、nd32The refractive indexes of the seventh lens and the eighth lens are shown, respectively.
Wherein the third lens group satisfies the following condition: 0<vd32<35，nd32>1.85。
The first lens group and the second lens group comprise two aspheric lenses.
Wherein, the aspheric surfaces of the two aspheric lenses are high-order aspheric surfaces.
Wherein at least one of the first lens group, the second lens group and the third lens group comprises a plastic lens; or all the lenses in the first lens group, the second lens group and the third lens group are glass lenses.
Wherein, optical system is fixed through one or more connected modes in magnetism, paste, screw thread or buckle with shooting equipment.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (51)
1. An optical system comprising a first lens group, a second lens group, and a third lens group, which are arranged in order from an object side to an image side, the first lens group and the second lens group each having positive power, the third lens group having negative power;
the optical system satisfies the following conditions: 0.85<|f1/f|<4.5，0.5<|f2/f|<1.5，3<|f3/f|<10，1<|TL/f|<1.5，0<|T1/T2|<0.5，0<|T3/T2|<0.5, wherein f1、f2、f3Respectively representing the focal lengths of the first lens group, the second lens group and the third lens group, f represents infinityA focal length of the optical system in focusing, TL represents a distance on an optical axis from a center vertex of a lens surface closest to the object side of the first lens group to an image plane, and T1Denotes a distance T from a central vertex of a lens surface closest to the object side of the first lens group to the stop2Denotes a distance T from a stop surface to a center vertex of a lens surface closest to the object side of the third lens group3And a distance from a central vertex of a lens surface closest to the object side in the third lens group to a central vertex of a lens surface closest to the image side in the third lens group.
2. The optical system according to claim 1, wherein the first lens group and the third lens group are fixed with respect to an image plane such that the second lens group moves from an object side to an image side along an optical axis.
3. The optical system according to claim 2, wherein the optical system includes at least eight lenses, in order from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; the first lens group comprises a first lens and a second lens, the second lens group comprises a third lens, a fourth lens, a fifth lens and a sixth lens, and the third lens group comprises at least more than one lens including a seventh lens.
4. The optical system of claim 3, wherein the first lens group and the second lens group comprise at least one aspheric lens.
5. The optical system according to claim 3, wherein the first lens is a negative lens, and the following condition is satisfied: 0.5<|f11/f|<2.5，0<|f12/f11|<1, wherein f11Denotes a focal length of a first lens of the first lens group, f12Denotes a focal length of the second lens of the first lens group.
6. The optical system according to claim 4, wherein the second lens of the first lens group is an aspherical lens.
7. The optical system of claim 6, wherein at least one surface of the second lens is aspheric.
8. The optical system according to claim 3, wherein the first lens and the second lens of the first lens group are each disposed between the object side and the stop.
9. The optical system according to claim 3, wherein the second lens group includes at least one or more positive lenses and one or more negative lenses.
10. The optical system of claim 9 wherein the second lens group comprises at least one set of double cemented lenses.
11. The optical system according to claim 10, wherein the third lens and the fourth lens of the second lens group are double cemented lenses, and the fifth lens and the sixth lens of the second lens group are single lenses, respectively.
12. The optical system according to claim 11, wherein the second lens group satisfies the following condition: 0<|f20/f2|<1，0.25<|f23/f2|<2.5，0<|f24/f2|<1, wherein f20Denotes the overall focal length of the double cemented lens in the second lens group, f23Denotes a focal length of a fifth lens in the second lens group, f24Denotes a focal length of the sixth lens in the second lens group.
13. The optical system of claim 4, wherein the second lens group comprises at least one aspheric lens.
14. The optical system of claim 13, wherein the second lens group comprises an aspheric lens having at least one aspheric surface.
15. The optical system according to claim 4, 6 or 13, wherein the aspherical surface of the aspherical lens is disposed on a lens surface having a smaller aperture.
16. The optical system according to claim 3, wherein the third lens group further includes an eighth lens, the third lens group includes at least one piece of positive lens and one piece of negative lens, and the following condition is satisfied: 0<|f31/f3|<0.5，0<|f32/f3|<0.5, wherein f31Denotes a focal length of a seventh lens in the third lens group, f32Denotes a focal length of an eighth lens in the third lens group.
17. The optical system according to claim 16, wherein image side surfaces of the seventh lens and the eighth lens in the third lens group are both curved toward the object side.
18. The optical system according to claim 3, wherein the first lens group satisfies the following condition: (vd)11，vd12)>40，1.4<nd11<1.6，1.5<nd12<2; wherein vd11、vd12Respectively representing the dispersion coefficients of the first lens and the second lens; nd11、nd12Respectively representing the refractive indexes of the first lens and the second lens.
19. The optical system according to claim 3, wherein the second lens group satisfies the following condition: (vd)21，vd23，vd24)>40，0<vd22<40，1.4<nd24<1.6，1.5<(nd21，nd22，nd23)<2; wherein vd21、vd22、vd23、vd24Respectively representing the dispersion coefficients of the third lens, the fourth lens, the fifth lens and the sixth lens; nd21、nd22、nd23、nd24The refractive indexes of the third lens, the fourth lens, the fifth lens and the sixth lens are respectively shown.
20. The optical system according to claim 19, wherein the second lens group satisfies the following condition: 0<vd22<35，nd22>1.6，vd24>81，nd24<1.5。
21. The optical system according to claim 16, wherein the third lens group satisfies the following condition: 0<vd32<40，30<vd31<60，1.5<(nd31，nd32)<2; wherein vd31、vd32Respectively representing the dispersion coefficients of the seventh lens and the eighth lens; nd31、nd32Respectively, the refractive indexes of the seventh lens and the eighth lens.
22. The optical system according to claim 21, wherein the third lens group satisfies the following condition: 0<vd32<35，nd32>1.85。
23. The optical system according to claim 4, wherein the first lens group and the second lens group comprise two aspherical lenses.
24. The optical system of claim 23, wherein the aspheric surfaces of the two aspheric lenses are high order aspheric surfaces.
25. The optical system according to any one of claims 1 to 24, wherein at least one of the first, second and third lens groups comprises a plastic lens; or all lenses in the first lens group, the second lens group and the third lens group are glass lenses.
26. A photographing apparatus comprising an optical system and a photographing device, the optical system being connected to the photographing device, the optical system comprising a first lens group, a second lens group and a third lens group arranged in order from an object side to an image side, the first lens group and the second lens group each having positive power, the third lens group having negative power;
the optical system satisfies the following conditions: 0.85<|f1/f|<4.5，0.5<|f2/f|<1.5，3<|f3/f|<10，1<|TL/f|<1.5，0<|T1/T2|<0.5，0<|T3/T2|<0.5, wherein f1、f2、f3Respectively showing the focal lengths of the first lens group, the second lens group and the third lens group, f showing the focal length of the optical system in the infinite focusing, TL showing the distance from the central peak of the lens surface closest to the object side of the first lens group to the imaging surface, and T1Denotes a distance T from a central vertex of a lens surface closest to the object side of the first lens group to the stop2Denotes a distance T from a stop surface to a center vertex of a lens surface closest to the object side of the third lens group3And a distance from a central vertex of a lens surface closest to the object side in the third lens group to a central vertex of a lens surface closest to the image side in the third lens group.
27. The imaging device according to claim 26, wherein in a state where the first lens group and the third lens group are fixed with respect to an imaging surface, the second lens group is moved from an object side to an image side along an optical axis.
28. The imaging device according to claim 27, wherein the optical system includes at least eight lenses, in order from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; the first lens group comprises a first lens and a second lens, the second lens group comprises a third lens, a fourth lens, a fifth lens and a sixth lens, and the third lens group comprises at least more than one lens including a seventh lens.
29. The imaging device of claim 28, wherein the first lens group and the second lens group comprise at least one aspherical lens.
30. The imaging apparatus according to claim 28, wherein the first lens is a negative lens, and the following condition is satisfied: 0.5<|f11/f|<2.5，0<|f12/f11|<1, wherein f11Denotes a focal length of a first lens of the first lens group, f12Denotes a focal length of the second lens of the first lens group.
31. The imaging device according to claim 29, wherein the second lens of the first lens group is an aspherical lens.
32. The camera of claim 31, wherein at least one surface of said second lens is aspheric.
33. The photographing device of claim 28, wherein the first lens and the second lens of the first lens group are each disposed between the object side and the stop.
34. The imaging device of claim 28, wherein the second lens group includes at least one or more positive lenses and one or more negative lenses.
35. The camera of claim 34, wherein said second lens group comprises at least one group of cemented doublets.
36. The photographing device according to claim 35, wherein the third lens and the fourth lens of the second lens group are double cemented lenses, and the fifth lens and the sixth lens of the second lens group are single lenses, respectively.
37. The photographing device according to claim 36, wherein the second lens group satisfies a condition that: 0<|f20/f2|<1，0.25<|f23/f2|<2.5，0<|f24/f2|<1, wherein f20Denotes the overall focal length of the double cemented lens in the second lens group, f23Denotes a focal length of a fifth lens in the second lens group, f24Denotes a focal length of the sixth lens in the second lens group.
38. The camera of claim 29, wherein said second lens group comprises at least one aspheric lens.
39. The camera of claim 38, wherein the second lens group comprises at least one aspheric lens having at least one aspheric surface.
40. The imaging device according to claim 29, 31, or 38, wherein an aspherical surface of the aspherical lens is provided on a lens surface having a smaller aperture.
41. The photographing device according to claim 28, wherein the third lens group further includes an eighth lens, the third lens group includes at least one piece of positive lens and one piece of negative lens, and the following condition is satisfied: 0<|f31/f3|<0.5，0<|f32/f3|<0.5, wherein f31Denotes a focal length of a seventh lens in the third lens group, f32Denotes a focal length of an eighth lens in the third lens group.
42. The imaging device according to claim 41, wherein image side surfaces of the seventh lens and the eighth lens in the third lens group are each curved toward the object side.
43. The photographing device according to claim 28, wherein the first lens group satisfies a condition that: (vd)11，vd12)>40，1.4<nd11<1.6，1.5<nd12<2; wherein vd11、vd12Respectively representing the dispersion coefficients of the first lens and the second lens; nd11、nd12Respectively representing the refractive indexes of the first lens and the second lens.
44. The photographing device according to claim 28, wherein the second lens group satisfies a condition that: (vd)21，vd23，vd24)>40，0<vd22<40，1.4<nd24<1.6，1.5<(nd21，nd22，nd23)<2; wherein vd21、vd22、vd23、vd24Respectively representing the dispersion coefficients of the third lens, the fourth lens, the fifth lens and the sixth lens; nd21、nd22、nd23、nd24The refractive indexes of the third lens, the fourth lens, the fifth lens and the sixth lens are respectively shown.
45. The photographing device according to claim 44, wherein the second lens group satisfies a condition that: 0<vd22<35，nd22>1.6，vd24>81，nd24<1.5。
46. The photographing device according to claim 41, wherein the third lens group satisfies a condition that:0<vd32<40，30<vd31<60，1.5<(nd31，nd32)<2; wherein vd31、vd32Respectively representing the dispersion coefficients of the seventh lens and the eighth lens; nd31、nd32Respectively, the refractive indexes of the seventh lens and the eighth lens.
47. The photographing device according to claim 46, wherein the third lens group satisfies a condition that: 0<vd32<35，nd32>1.85。
48. The imaging device according to claim 29, wherein the first lens group and the second lens group include two aspherical lenses.
49. The imaging apparatus according to claim 48, wherein aspherical surfaces of the two aspherical lenses are high-order aspherical surfaces.
50. The imaging device according to any one of claims 26 to 49, wherein at least one of the first lens group, the second lens group, and the third lens group comprises a plastic lens; or all lenses in the first lens group, the second lens group and the third lens group are glass lenses.
51. The camera of any one of claims 26 to 50, wherein the optical system is fixed to the camera by one or more of magnetic attraction, adhesion, screw thread or snap connection.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2019/123117 WO2021109042A1 (en) | 2019-12-04 | 2019-12-04 | Optical system and photographing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112955803A true CN112955803A (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980067392.4A Pending CN112955803A (en) | 2019-12-04 | 2019-12-04 | Optical system and imaging device |
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| Country | Link |
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| CN (1) | CN112955803A (en) |
| WO (1) | WO2021109042A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114326042A (en) * | 2022-01-18 | 2022-04-12 | 浙江舜宇光学有限公司 | Moving focusing optical lens group |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4196969A (en) * | 1977-07-30 | 1980-04-08 | Asahi Kogaku Kogyo Kabushiki Kaisha | Zoom lens having a small distortion aberration |
| US5969880A (en) * | 1997-03-21 | 1999-10-19 | Asahi Kogaku Kogyo Kabushiki Kaisha | Zoom lens system |
| JP2000056224A (en) * | 1998-08-12 | 2000-02-25 | Nikon Corp | Variable focal distance lens system |
| US6075654A (en) * | 1998-07-07 | 2000-06-13 | Fuji Photo Optical Co., Ltd. | Three-group zoom lens |
| CN1263272A (en) * | 1999-02-10 | 2000-08-16 | 株式会社尼康 | Zoom lens system |
| CN102645721A (en) * | 2011-02-17 | 2012-08-22 | 索尼公司 | Imaging lens and imaging apparatus |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005077770A (en) * | 2003-09-01 | 2005-03-24 | Pentax Corp | Variable power optical system |
| GB2464078B (en) * | 2007-10-04 | 2011-11-02 | Nikon Vision Co Ltd | Zoom eyepiece lens system |
| CN106918894A (en) * | 2017-02-28 | 2017-07-04 | 信华精机有限公司 | A kind of small aberration optical lens |
| WO2018216789A1 (en) * | 2017-05-26 | 2018-11-29 | 株式会社ｎｉｔｔｏｈ | Optical system for image pickup, and image pickup device |
| CN107632376B (en) * | 2017-10-31 | 2024-02-23 | 舜宇光学(中山)有限公司 | Visual lens |
| CN107807439B (en) * | 2017-11-24 | 2019-03-08 | 嘉兴中润光学科技有限公司 | Interchangeable of dolly-out,ing dolly-back tight shot |
| JP6519890B1 (en) * | 2017-11-30 | 2019-05-29 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ | Lens system, imaging device, and moving body |
| CN110456482B (en) * | 2019-08-19 | 2020-10-09 | 嘉兴中润光学科技有限公司 | Ultra-wide angle interchangeable fixed focus lens |
-
2019
- 2019-12-04 WO PCT/CN2019/123117 patent/WO2021109042A1/en active Application Filing
- 2019-12-04 CN CN201980067392.4A patent/CN112955803A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4196969A (en) * | 1977-07-30 | 1980-04-08 | Asahi Kogaku Kogyo Kabushiki Kaisha | Zoom lens having a small distortion aberration |
| US5969880A (en) * | 1997-03-21 | 1999-10-19 | Asahi Kogaku Kogyo Kabushiki Kaisha | Zoom lens system |
| US6075654A (en) * | 1998-07-07 | 2000-06-13 | Fuji Photo Optical Co., Ltd. | Three-group zoom lens |
| JP2000056224A (en) * | 1998-08-12 | 2000-02-25 | Nikon Corp | Variable focal distance lens system |
| CN1263272A (en) * | 1999-02-10 | 2000-08-16 | 株式会社尼康 | Zoom lens system |
| CN102645721A (en) * | 2011-02-17 | 2012-08-22 | 索尼公司 | Imaging lens and imaging apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114326042A (en) * | 2022-01-18 | 2022-04-12 | 浙江舜宇光学有限公司 | Moving focusing optical lens group |
| CN114326042B (en) * | 2022-01-18 | 2024-05-31 | 浙江舜宇光学有限公司 | Optical lens group capable of moving focusing |
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| Publication number | Publication date |
|---|---|
| WO2021109042A1 (en) | 2021-06-10 |
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