CN218675473U - Full-frame long-focus large-magnification anamorphic lens - Google Patents
Full-frame long-focus large-magnification anamorphic lens Download PDFInfo
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- CN218675473U CN218675473U CN202222734721.8U CN202222734721U CN218675473U CN 218675473 U CN218675473 U CN 218675473U CN 202222734721 U CN202222734721 U CN 202222734721U CN 218675473 U CN218675473 U CN 218675473U
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Abstract
The application discloses a full-frame long-focus large-magnification deformable lens, which comprises a cylindrical lens group and a spherical lens group which are sequentially arranged from an object space to an image space, wherein the cylindrical lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially arranged from the object space to the image space; the spherical lens group comprises a sixth lens, a seventh lens, a \ 8230, an nth lens and a third lens, wherein the sixth lens, the seventh lens, the \ 8230, the nth lens and the nth lens are sequentially arranged along the direction of a light path pointing to an image space, and N is a natural number greater than or equal to 15; the lenses in the cylindrical lens group and the spherical lens group satisfy the following relations: 95mm woven fabric (f (1-N) Y <110mm;56mm is woven fabric f (1-N) X <68mm;1.55 yarn (f (1-N) Y/f (1-N) X <1.65;0.25 yarn of f (6-8) X/f (9-15) X <0.45;0.50 yarn (f (1-3)) X/f (4-5) Y is less than 0.65; -12.0 sj (4-5) Y/f (11-13) Y < -10.0; adopt cylinder lens group and sphere lens group to make up in this application and use and carry out rational distribution to focal power, increase the angle of field that the camera lens level was shot, make the picture width grow that the actual shooting obtained, the full picture width and the big multiplying power of telephoto lens in realizing, and use two sets of internal focusing groups that float to realize that the object image distance is from 0.90m to infinity focuses.
Description
Technical Field
The application relates to the technical field of optical objective lenses, in particular to a full-frame long-focus large-magnification anamorphic lens.
Background
With the development of self-media, plog, vlog and the like are shared more and more, photographing and video shooting become daily lives of common consumers, and photo, short-film and micro-movie people are more and more shot by using tools such as mobile phones, cameras and the like.
The proportion of pictures shot by devices such as mobile phones, tablet computers and cameras on the market is 16. In contrast, brands such as germany-hokk, uk-cook, germany-alai, usa-pandavist, french-anqin, and SLR of hong kong in china have an anamorphic lens dedicated to movie shooting, but the above-mentioned anamorphic lens is generally directed to professional-grade customers, is expensive, and cannot be carried at any time due to its volume and weight, thus limiting the use of ordinary consumers.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a small, light in weight's full picture longjiao large magnification deformation camera lens, the technical scheme of adoption is:
a full-frame long-focus large-magnification deformable lens comprises a cylindrical lens group and a spherical lens group which are arranged in sequence from an object space to an image space,
the cylindrical lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged in sequence from an object side to an image side, wherein the first lens, the second lens and the fourth lens are negative focal power cylindrical lenses, and the third lens and the fifth lens are positive focal power cylindrical lenses;
the spherical lens group comprises a sixth lens, a seventh lens, a \ 8230, an nth lens and a third lens, wherein the sixth lens, the seventh lens, the \ 8230, the nth lens and the nth lens are sequentially arranged along the direction of a light path pointing to an image space, and N is a natural number greater than or equal to 15;
defining the curvature direction of the first lens as X direction, defining the direction vertical to the X direction as Y direction, then f (m-N) X is the comprehensive optical focal length of the m lens to the N lens along the X direction, f (m-N) Y is the comprehensive optical focal length of the m lens to the N lens along the Y direction, m is more than or equal to 1 and less than or equal to N and less than or equal to N,
the lenses in the cylindrical lens group and the spherical lens group satisfy the following relations:
95mm<f(1～N)Y<110mm；
56mm<f(1～N)X<68mm；
1.55<f(1～N)Y/f(1～N)X<1.65；
0.25<f(6～8)X/f(9～15)X<0.45；
0.50<f(1～3)X/f(4～5)Y<0.65；
-12.0<f(4～5)Y/f(11～13)Y<-10.0。
the utility model discloses a technical scheme that its technical problem was solved to an embodiment adopted is: n is 15, and the sixth lens, the seventh lens, the tenth lens, the twelfth lens and the thirteenth lens are all spherical lenses with positive focal power;
the eighth lens, the ninth lens, the eleventh lens, the fourteenth lens and the fifteenth lens are all spherical lenses with negative focal power.
The utility model discloses a technical scheme that its technical problem was solved to an embodiment adopted is: the second lens and the third lens are a first focusing group, the eleventh lens, the twelfth lens and the thirteenth lens are a second focusing group, and the first focusing group and the second focusing group are linked inner focusing groups.
The utility model discloses an embodiment solves the technical scheme that its technical problem adopted and is: the ninth lens and the tenth lens are cemented spherical lenses.
The utility model discloses a technical scheme that its technical problem was solved to an embodiment adopted is: the second lens and the third lens are cemented cylindrical lenses.
The utility model discloses a technical scheme that its technical problem was solved to an embodiment adopted is: the front end of the anamorphic lens is matched with a filter with the aperture of 82 mm.
The utility model discloses a technical scheme that its technical problem was solved to an embodiment adopted is: the focal length of the anamorphic lens in the Y direction is 100mm.
The utility model discloses a technical scheme that its technical problem was solved to an embodiment adopted is: the zoom ratio of the anamorphic lens is 1.6X.
The utility model discloses a technical scheme that its technical problem was solved to an embodiment adopted is: the mass of the anamorphic lens is less than 1300g.
The utility model discloses an embodiment solves the technical scheme that its technical problem adopted and is: the cylindrical lens group and the spherical lens group both adopt optical glass lenses.
The utility model has the advantages that:
the cylindrical lens group and the spherical lens group are combined for use to reasonably distribute focal power, so that the optical structure of the anamorphic lens is more compact and smaller, the cost is lower, the optical characteristics of the cylindrical lens group are utilized to compress light entering horizontally, the light entering in the vertical direction is kept unchanged, and the light is comprehensively corrected through the spherical lens group, so that the field angle of horizontal shooting of the lens is increased, the width of a picture obtained by actual shooting is increased, and the full picture and the large magnification of a medium-long focal lens are realized;
the second lens and the third lens form a first focusing group, the eleventh lens, the twelfth lens and the thirteenth lens form a second focusing group, the first focusing group and the second focusing group form an internal linkage floating internal focusing structure, the overall length of the lens is kept unchanged during adjustment, and the two groups of floating internal focusing groups are used for realizing focusing from 0.90m to infinity of an object image distance;
the cylindrical lens and the spherical lens of the anamorphic lens are integrated to carry out aberration correction design, which is beneficial to ensuring that the anamorphic lens has good process adjustability;
the anamorphic lens adopts a compact design of integrating a cylindrical surface and a spherical surface, has small volume and mass less than 1300g, and can realize the anamorphic lens with full picture, high multiplying power (1.6X), long focus, high resolution, low respiration and low distortion while being portable.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is an optical structure diagram of a deformable lens in the X direction in embodiment 1 of the present invention;
fig. 2 is an optical structure diagram of the anamorphic lens in the Y direction in embodiment 1 of the present invention;
fig. 3 is an optical MTF diagram of a deformable lens in embodiment 1 of the present invention;
fig. 4 is an optical field curvature and distortion diagram in embodiment 1 of the present invention;
fig. 5 is an optical structure diagram of the anamorphic lens in the X direction in embodiment 2 of the present invention;
fig. 6 is an optical structure diagram of the anamorphic lens in the Y direction in embodiment 2 of the present invention;
fig. 7 is an optical MTF diagram of a anamorphic lens according to embodiment 2 of the present invention;
fig. 8 is an optical curvature of field, distortion diagram of the anamorphic lens according to embodiment 2 of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as excluding the number, and the terms greater than, less than, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the present invention, unless otherwise explicitly defined, the terms "set," "mounted," "connected," and the like are to be understood in a broad sense, and may be directly connected or indirectly connected through an intermediate medium, for example; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.
Example 1
Referring to fig. 1-4, embodiment 1 discloses a full-frame telephoto large-magnification anamorphic lens, comprising a cylindrical lens group, a diaphragm, and a spherical lens group sequentially arranged from an object side to an image side,
the cylindrical lens group comprises a first lens 101, a second lens 102, a third lens 103, a fourth lens 104 and a fifth lens 105 which are arranged in sequence from an object side to an image side, wherein the first lens 101, the second lens 102 and the fourth lens 104 are cylindrical lenses with negative focal power, and the third lens 103 and the fifth lens 105 are cylindrical lenses with positive focal power;
the spherical lens group comprises a sixth lens 106, a seventh lens 107, a \ 8230, an Nth lens and a third lens, wherein the sixth lens and the seventh lens are sequentially arranged along the direction of a light path pointing to an image, and N is a natural number which is more than or equal to 15; the stop is disposed between the eighth lens 108 and the ninth lens 109.
Defining the curvature direction of the first lens 101 as X direction, defining the direction perpendicular to the X direction as Y direction, then f (m-N) X is the integrated optical focal length of the m lens to the N lens along the X direction, f (m-N) Y is the integrated optical focal length of the m lens to the N lens along the Y direction, 1 is more than or equal to m < N is less than or equal to N,
the lenses in the cylindrical lens group and the spherical lens group satisfy the following mathematical relationship:
95mm<f(1～N)Y<110mm；
56mm<f(1～N)X<68mm；
1.55<f(1～N)Y/f(1～N)X<1.65；
0.25<f(6～8)X/f(9～15)X<0.45；
0.50<f(1～3)X/f(4～5)Y<0.65；
-12.0<f(4～5)Y/f(11～13)Y<-10.0。
the cylindrical lens group and the spherical lens group are combined through the lens and reasonably distribute focal power, so that the optical structure of the lens is more compact and small, light entering horizontally is compressed by utilizing the optical characteristics of the cylindrical lens group, the light entering in the vertical direction is kept unchanged, the light is corrected through the spherical lens group comprehensively, the angle of field of horizontal shooting is increased, the actually obtained picture width is enlarged, the proportion of the obtained picture is 2.4.
The parameters of the respective lenses in the present embodiment that meet the above mathematical relationship are shown in table 1.
TABLE 1
In this embodiment, N =15, the spherical lens group includes a sixth lens 106, a seventh lens 107, an eighth lens 108, a ninth lens 109, a tenth lens 110, an eleventh lens 111, a twelfth lens 112, a thirteenth lens 113, a fourteenth lens 114, and a fifteenth lens, which are sequentially disposed along a direction in which an optical path points to an image side, and the sixth lens 106, the seventh lens 107, the tenth lens 110, the twelfth lens 112, and the thirteenth lens 113 are all spherical lenses with positive power;
the eighth lens 108, the ninth lens 109, the eleventh lens 111, the fourteenth lens 114, and the fifteenth lens 115 are all spherical lenses having negative refractive power.
In another embodiment, the telephoto-large-magnification anamorphic lens in the full frame is not limited to 15 lenses, and the number of lenses of the anamorphic lens may be further varied as long as the focal power of the lenses of the anamorphic lens satisfies the above mathematical relationship.
Based on the utility model discloses a conceive, in order to distinguish with this application, carry out the adaptability change to the lens shape, tear single lens open for two or more lenses, merge into a simple transform that the optical structure of camera lens etc. goes on with the symbol lens two in succession, and lens or lens group focal power distribution after changing still satisfy above-mentioned mathematical relationship, should also incorporate in the protective range of this application.
In addition to the present embodiment, modifications and substitutions of the number of lenses and the combination mode for distinguishing from the present application are included in the scope of protection of the present application without departing from the gist of the present application.
Referring to fig. 1 and 2, in this embodiment, the second lens 102 and the third lens 103 are a first focusing group, the eleventh lens 111, the twelfth lens 112, and the thirteenth lens 113 are a second focusing group, the first focusing group and the second focusing group are linked inner focusing groups, the first focusing group and the second focusing group are adjusted in the anamorphic lens, the overall length of the lens remains unchanged, and the object image distance is focused at infinity.
Fig. 3 is an MTF curve of the anamorphic lens in this embodiment, according to which the anamorphic lens has a sharp resolution;
fig. 4 is an optical curvature of field and distortion diagram of the anamorphic lens in this embodiment, and it can be known from fig. 4 that the anamorphic lens in this embodiment has a small distortion amount, which can ensure that the deformation amount of the imaging picture is as small as possible.
The utility model discloses an in some embodiments, the front end of full-frame long burnt large magnification deformation camera lens is provided with the bore and is 82 mm's filter, can the stray light of filtering, improves imaging quality.
In this embodiment, the second lens 102 and the third lens 103 are cemented cylindrical lenses; the ninth lens 109 and the tenth lens 110 are cemented spherical lenses. The two groups of gluing structures are combined in a gluing mode. As an alternative embodiment, in order to distinguish from the present application, the lens shape after the combination is modified by changing the combination method, such as bonding or integral molding, and then adaptively changing the combination method should be included in the protection scope of the present application.
In this embodiment, the focal length of the full-frame medium-telephoto large-magnification anamorphic lens in the Y direction is 100mm, the zoom ratio is 1.6X, and the mass is less than 1300g.
The utility model discloses an in some embodiments, cylinder lens group and spherical lens group all adopt the optical glass lens, compare the plastic lens, and the temperature application scope of optical glass lens is wide, and structural style is simple, greatly reduced the processing degree of difficulty, easily preserve, reduced camera lens manufacturing cost.
The utility model provides an anamorphic lens adopts the integrated design, realizes that the camera lens is small obtains outstanding super price ratio optical property such as high resolution, low breathing, low distortion, full picture, high magnification (1.6X) simultaneously, still can design the camera of each brand on the compatible market to the bayonet socket when in-service production to enlarge application scope.
Example 2
Unlike embodiment 1, referring to fig. 5 and 6, the first focus group and the second focus group are adjusted in the anamorphic lens, the overall length of the lens is kept constant, and the ultra-close object distance of the anamorphic lens is 0.9m.
Fig. 7 is an MTF curve of the anamorphic lens in this embodiment, from which it can be seen that the anamorphic lens in this embodiment has a sharp resolution;
fig. 8 is a diagram of optical field curvature and distortion of the anamorphic lens in this embodiment, and it can be known from fig. 8 that the anamorphic lens in this embodiment has a small distortion amount, which can ensure that an image frame has a deformation amount as small as possible.
The present invention is not limited to the above embodiments, and equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and the equivalents and substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (10)
1. A full-frame long-focus large-magnification deformable lens is characterized by comprising a cylindrical lens group and a spherical lens group which are sequentially arranged from an object space to an image space,
the cylindrical lens group comprises a first lens (101), a second lens (102), a third lens (103), a fourth lens (104) and a fifth lens (105) which are arranged in sequence from an object side to an image side, the first lens (101), the second lens (102) and the fourth lens (104) are negative focal power cylindrical lenses, and the third lens (103) and the fifth lens (105) are positive focal power cylindrical lenses;
the spherical lens group comprises a sixth lens (106), a seventh lens (107), a \8230 \ 8230 \ 8230;, an Nth lens which are sequentially arranged along the direction of a light path pointing to an image space, wherein N is a natural number greater than or equal to 15;
defining the curvature direction of the first lens (101) as an X direction and defining the direction vertical to the X direction as a Y direction, then f (m-N) X is the comprehensive optical focal length of the mth lens to the nth lens along the X direction, f (m-N) Y is the comprehensive optical focal length of the mth lens to the nth lens along the Y direction, and m is more than or equal to 1 and less than N and less than or equal to N,
the lenses in the cylindrical lens group and the spherical lens group satisfy the following relations:
95mm<f(1～N)Y<110mm；
56mm<f(1～N)X<68mm；
1.55<f(1～N)Y/f(1～N)X<1.65；
0.25<f(6～8)X/f(9～15)X<0.45；
0.50<f(1～3)X/f(4～5)Y<0.65；
-12.0<f(4～5)Y/f(11～13)Y<-10.0。
2. the full-frame telephoto high-power anamorphic lens according to claim 1, wherein N is 15, and the sixth lens (106), the seventh lens (107), the tenth lens (110), the twelfth lens (112), and the thirteenth lens (113) are all spherical lenses with positive optical power;
the eighth lens (108), the ninth lens (109), the eleventh lens (111), the fourteenth lens (114), and the fifteenth lens (115) are all spherical lenses having negative optical power.
3. The full-frame telephoto high-magnification anamorphic lens according to claim 2, wherein the second lens (102) and the third lens (103) are a first focus group, the eleventh lens (111), the twelfth lens (112), and the thirteenth lens (113) are a second focus group, and the first focus group and the second focus group are linked inner focus groups.
4. The full-frame telephoto large-power anamorphic lens according to claim 1, wherein the ninth lens (109) and the tenth lens (110) are cemented spherical lenses.
5. The full-frame telephoto high-power anamorphic lens according to claim 1, wherein the second and third lenses (102, 103) are cemented cylindrical lenses.
6. The full-frame telephoto large-magnification anamorphic lens according to any one of claims 1-5, wherein a front end of the anamorphic lens matches a filter having an aperture of 82 mm.
7. The full-frame telephoto large-magnification anamorphic lens according to any one of claims 1-5, wherein the anamorphic lens has a focal length in the Y direction of 100mm.
8. The full-frame telephoto large-magnification anamorphic lens according to any one of claims 1-5, wherein the anamorphic lens has a zoom ratio of 1.6X.
9. The full-frame telephoto high-magnification anamorphic lens according to any one of claims 1-5, wherein the anamorphic lens has a mass of less than 1300g.
10. The full-frame telephoto high-power anamorphic lens according to any one of claims 1-5, wherein the cylindrical lens group and the spherical lens group both use optical glass lenses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222734721.8U CN218675473U (en) | 2022-10-17 | 2022-10-17 | Full-frame long-focus large-magnification anamorphic lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222734721.8U CN218675473U (en) | 2022-10-17 | 2022-10-17 | Full-frame long-focus large-magnification anamorphic lens |
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| CN218675473U true CN218675473U (en) | 2023-03-21 |
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| CN202222734721.8U Active CN218675473U (en) | 2022-10-17 | 2022-10-17 | Full-frame long-focus large-magnification anamorphic lens |
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