CN219143183U - Full-frame super-long-focus high-magnification deformation lens - Google Patents
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- CN219143183U CN219143183U CN202223214125.3U CN202223214125U CN219143183U CN 219143183 U CN219143183 U CN 219143183U CN 202223214125 U CN202223214125 U CN 202223214125U CN 219143183 U CN219143183 U CN 219143183U
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Abstract
The utility model discloses a full-frame ultra-long focal large-magnification anamorphic lens, which comprises a cylindrical lens group, a spherical lens group and a thirteenth lens, wherein the cylindrical lens group and the spherical lens group are sequentially arranged from an object space to an image space, and the thirteenth lens is a negative focal power cylindrical lens and is positioned behind a diaphragm; the cylindrical lens group and the spherical lens group of the deformed lens are combined by adopting brand new lenses and reasonably distributing focal power, so that the optical structure of the lens is more compact and small, the cost is lower, the optical characteristics of the cylindrical lens group are utilized, light entering horizontally is compressed, light entering vertically is kept unchanged, the light is comprehensively corrected by the rear spherical lens group, and a negative focal power cylindrical lens is arranged in the middle of the spherical lens group, so that the astigmatism and chromatic aberration of the ultra-long focal lens can be corrected, the horizontal and vertical performances of the lens are balanced, the angle of view of the lens is increased, the width of an actually shot picture is enlarged, and the full picture width and the large multiplying power of the ultra-long focal lens are realized.
Description
Technical Field
The utility model relates to the technical field of optical lenses, in particular to a full-frame ultralong Jiao Da magnification deformable lens.
Background
With the development of self-media, plog and vlog share more and more, photographing and video shooting have become daily life of ordinary consumers, and the use of tools such as mobile phones, cameras and the like for shooting photos, shortcuts and micro-movie crowds are more and more.
The proportion of pictures conventionally shot by devices such as a mobile phone, a tablet personal computer, a camera and the like in the market is 16:9, the proportion of pictures of wide screen video with movie feeling is 2.4:1, and the micro-movie or video shooting needs to be matched with lenses with different focal sections, and particularly, the close-up lens needs to have a long-focus deformation function. In this regard, germany-holk, uk-kuk, germany-alai, us-Pan Nawei, france-An Qin, and SLR of hong kong in china, etc. brands have deformed shots dedicated to movie shooting, but the deformed shots are generally oriented to professional-class customers, are expensive, and cannot be carried at any time due to the volume and weight thereof, thus limiting the use of ordinary consumers.
The professional anamorphic lens with high price and large quality is not suitable for common users. Therefore, how to make the volume of the very important full-frame super-long-focus large-magnification deformable lens small and the weight light in video shooting is a technical problem to be solved at present.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a full-frame ultra-long-focus high-magnification deformable lens, which can solve the problems of large volume, high price and the like of the traditional lens.
The full-frame ultra-long-focus high-magnification anamorphic lens comprises a cylindrical lens group and a spherical lens group which are sequentially arranged from an object side to an image side, and a thirteenth lens arranged in the middle of the spherical lens group, wherein the thirteenth lens is a negative focal power cylindrical lens positioned behind a diaphragm;
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 an object space to an image space; the first lens, the second lens and the fourth lens are negative-power cylindrical lenses, and the third lens and the fifth lens are positive-power cylindrical lenses;
the spherical lens group comprises a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, a fourteenth lens and an nth lens which are sequentially arranged along the direction that the light path points to the image space, wherein N is a natural number which is more than or equal to sixteen;
the power distribution of the first lens to the nth lens satisfies the following relationship:
125mm<f(1～N)Y<140mm；
66mm<f(1～N)X<78mm；
1.75<f(1～N)Y/f(1～N)X<1.85；
-1.50<(f(4～9)Y/(f14～15)Y<-1.20；
7.50<f(1～3)X/f(4～5)Y<8.50；
-2.20<f(1～9)X/f(10～16)Y<-1.80；
wherein the curvature direction of the first lens is X direction, Y is vertical X direction, f (m-N) X is the comprehensive optical focal length of the mth lens to the nth lens along X direction, f (m-N) Y is the comprehensive optical focal length of the mth lens to the nth lens along Y direction, and m < N is more than or equal to 1 and less than or equal to N.
The full-frame ultra-long-focus high-magnification deformable lens provided by the embodiment of the first aspect of the utility model has at least the following beneficial effects: the cylindrical lens group and the spherical lens group of the deformed lens are combined by adopting brand new lenses and reasonably distributing focal power, so that the optical structure of the lens is more compact and small, the cost is lower, the light entering horizontally is compressed by utilizing the optical characteristics of the cylindrical lens group, the light entering vertically is kept unchanged, the light entering vertically is comprehensively corrected by the rear spherical lens group, and the cylindrical lens with negative focal power is arranged in the middle of the spherical lens group, so that the astigmatism and the chromatic aberration of the ultra-long focal lens can be corrected, the horizontal and vertical performances of the lens are balanced, the angle of view of the horizontal shooting of the lens is increased, the width of an actually shot picture is enlarged, the full picture width and the large multiplying power of the ultra-long focal lens are realized, and in addition, the cylindrical lens and the spherical lens are integrally compact, so that the size and the quality of the lens are small, and the cost is greatly reduced.
According to some embodiments of the utility model, N is equal to sixteen, the seventh lens, eighth lens, eleventh lens, fourteenth lens, fifteenth lens are all spherical lenses of positive optical power; the sixth lens, the ninth lens, the tenth lens, the twelfth lens and the sixteenth lens are all spherical lenses with negative focal power.
According to some embodiments of the utility model, the sixth lens, seventh lens, eighth lens and ninth lens form a first focus group, the fourteenth lens and fifteenth lens form a second focus group, and the first focus group and the second focus group are linked inner focus groups.
According to some embodiments of the utility model, the eighth lens and the ninth lens are cemented spherical lenses, the tenth lens, the eleventh lens and the twelfth lens are cemented lens, and the cemented spherical lens and the cemented lens are used for correcting optical chromatic aberration of the ultra-long focal high magnification anamorphic lens.
According to some embodiments of the utility model, the second lens and the third lens are double cemented cylindrical lenses for correcting optical chromatic aberration of an overlength Jiao Da magnification anamorphic lens.
According to some embodiments of the utility model, the fourth lens and the fifth lens are double cemented cylindrical lenses for correcting optical chromatic aberration of an overlength Jiao Da magnification anamorphic lens.
According to some embodiments of the utility model, a filter with an aperture of 82mm is arranged at the front end of the full-frame super-long-focus high-magnification deformable lens.
According to some embodiments of the utility model, the Y-direction focal length of the full-frame super-long-focus high-magnification anamorphic lens is 135mm.
According to some embodiments of the utility model, the zoom ratio of the full-frame super-tele high magnification anamorphic lens is 1.8X.
According to some embodiments of the utility model, the cylindrical lens group, the spherical lens group and the thirteenth lens are all optical glass lenses.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is an optical block diagram of an object image distance in the infinity X direction in one embodiment of the present utility model;
FIG. 2 is an optical block diagram of an object image distance in the infinity Y direction in one embodiment of the present utility model;
FIG. 3 is a graph of object image distance at infinity optical MTF in one embodiment of the present utility model;
FIG. 4 is a graph of the curvature of field and distortion of an object at infinity;
FIG. 5 is an optical structure diagram of an object at a distance of 0.9m X in accordance with one embodiment of the present utility model;
FIG. 6 is an optical structure diagram of an object at a distance of 0.9m Y in accordance with an embodiment of the present utility model;
FIG. 7 is a graph of optical MTF at an object distance of 0.9m in an embodiment of the present utility model;
FIG. 8 is a graph showing the curvature of field and distortion of an object at a distance of 0.9m in an embodiment of the present utility model.
Reference numerals:
a cylindrical lens group 100, a first lens 101, a second lens 102, a third lens 103, a fourth lens 104, a fifth lens 105,
A spherical lens group 200, 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, a fifteenth lens 115, and a sixteenth lens 116.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 2, a full-frame ultra-long focal length high magnification anamorphic lens according to the present technical solution includes a cylindrical lens group 100 and a spherical lens group 200 sequentially disposed from an object side to an image side, and a thirteenth lens 113 disposed in the middle of the spherical lens group 200, wherein the thirteenth lens 113 is a negative focal length cylindrical lens and is located at the rear of a diaphragm, based on the optical characteristics of the cylindrical lens group 100, light entering horizontally can be "compressed" while light entering vertically remains unchanged, and light entering vertically is comprehensively corrected by the rear spherical lens group 200, and a negative focal length cylindrical lens is disposed in the middle of the spherical lens group, so that the astigmatism and chromatic aberration of the ultra-long focal length lens, and the horizontal and vertical performances of the lens are balanced, and the angle of view of the lens for horizontal photographing is increased, so that the width of an actually photographed image is increased, and the cylindrical lens and the spherical lens are integrally designed for aberration correction, thereby ensuring that the lens has good process adjustability.
Specifically, the cylindrical lens group 100 includes a first lens 101, a second lens 102, a third lens 103, a fourth lens 104, and a fifth lens 105, which are disposed in order 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 200 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 fourteenth lens 114, and an nth lens, which are sequentially arranged in a direction in which the optical path points to the image side, N being a natural number of sixteen or more;
in this embodiment, N is sixteen, and the seventh lens 107, the eighth lens 108, the eleventh lens 111, the fourteenth lens 114, and the fifteenth lens 115 are spherical lenses with positive optical power; the sixth lens 106, the ninth lens 109, the tenth lens 110, the twelfth lens 112, and the sixteenth lens 116 are spherical lenses with negative power. It should be noted that, the full-frame super-long focal length high magnification anamorphic lens in this embodiment is not limited to 16 lenses, and may further extend on the basis of this scheme, for example, greater than or equal to 16, and also falls within the scope of the protection symbol in this scheme;
specific values of the actual parameters of each lens are not specifically limited, and in this embodiment, the focal power of each lens or lens group satisfies the following mathematical relationship:
125mm<f(1～N)Y<140mm；
66mm<f(1～N)X<78mm；
1.75<f(1～N)Y/f(1～N)X<1.85；
-1.50<(f(4～9)Y/(f14～15)Y<-1.20；
7.50<f(1～3)X/f(4～5)Y<8.50；
-2.20<f(1～9)X/f(10～16)Y<-1.80；
wherein the curvature direction of the first lens (101) is X direction, Y is vertical X direction, f (m-N) X is the comprehensive optical focal length of the m-th lens to the N-th lens along X direction, f (m-N) Y is the comprehensive optical focal length of the m-th lens to the N-th lens along Y direction, and m < N < 1 > is less than or equal to N.
The cylindrical lens group and the spherical lens group of the embodiment are combined through the lenses and reasonably distribute the focal power, so that the optical structure of the lens is more compact and small, the light entering horizontally is compressed by utilizing the optical characteristics of the cylindrical lens group, the light entering vertically is kept unchanged, the light is comprehensively corrected by the spherical lens group, the angle of view of horizontal shooting is increased, the width of an actually obtained picture is increased, the picture with the proportion of 2.4:1 can be obtained, and the full picture and the large multiplying power of the ultra-long focal lens are realized.
In some embodiments of the present utility model, the eighth lens 108 and the ninth lens 109 are cemented spherical lenses, and the tenth lens 110, the eleventh lens 111 and the twelfth lens 112 are cemented spherical lenses, and both the cemented spherical lens and the cemented spherical lens are used for correcting optical chromatic aberration of the super-tele high magnification anamorphic lens.
In some embodiments of the present utility model, the second lens 102 and the third lens 103 are double cemented cylindrical lenses for correcting optical chromatic aberration of the overlength Jiao Da magnification anamorphic lens.
In some embodiments of the present utility model, the fourth lens 104 and the fifth lens 105 are double cemented cylindrical lenses for correcting optical chromatic aberration of the overlength Jiao Da magnification anamorphic lens.
It should be noted that the manner in which the plurality of sets of glue structures are combined is bonding. As an alternative embodiment, in order to distinguish from the present application, it is also intended to include the protection scope of the present application that the above-described coupling method is changed, such as coupling, integral molding, etc., and then the shape of the coupled lens is adaptively changed. For a single lens or two consecutive lenses of equal sign optical power, a single lens may be split into two or more lenses, two consecutive lenses of equal sign may be combined into one lens, and the like, a simple transformation of the optical structure of the patent, such as a transformed lens or lens group optical power assignment, is within the mathematical relational expression of the patent. On the basis of the embodiment, the number of lenses and the combination mode are changed and replaced for distinguishing the lens from the application, and the lens is all in the protection scope of the application under the premise of not deviating from the spirit and the idea of the application.
In order to solve the focusing difficulties of the anamorphic lens, as shown in fig. 1 and 5, and fig. 2 and 6, in some embodiments of the present utility model, the sixth lens 106, the seventh lens 107, the eighth lens 108 and the ninth lens 109 form a first focusing group, the fourteenth lens 114 and the fifteenth lens 115 form a second focusing group, the first focusing group and the second focusing group are linked inner focusing groups, the overall length of the lens remains unchanged during adjustment, and two floating inner focusing groups are used to achieve focusing from 0.9m to infinity in object-image distance, and reduce respiratory effects during focusing.
Referring to fig. 3, the MTF curves of the deformed lens are shown, and as can be seen from the curves in the figure, the MTF of each field of view is greater than 0.3, and the deformed lens of the embodiment has sharp resolution, so that high definition image quality can be achieved completely; as shown in fig. 4, the distortion amount is small, and the imaging picture is ensured to have the smallest distortion amount.
Referring to fig. 5 and 6, the first focusing group and the second focusing group are adjusted in the deformed lens, the whole length of the lens is kept unchanged, and the super-near object image distance of the deformed lens with super-long focal length of 135mm is 0.9m. Referring to fig. 7, the MTF curves of the deformed lens are shown, and as can be seen from the curves in the figure, the MTF of each field of view is greater than 0.2, and the deformed lens of the embodiment has sharp resolution, so that high definition image quality can be achieved completely; as shown in fig. 8, the distortion amount is small, and the imaging picture is ensured to have the smallest possible distortion amount.
In addition, in some embodiments of the utility model, the front end of the full-frame ultra-long focal large-magnification deformable lens is provided with a filter with the caliber of 82mm, so that stray light can be filtered, and the imaging quality is improved.
In some embodiments of the utility model, the Y-direction focal length of the full-frame super-long-focus high-magnification anamorphic lens is 135mm, the zoom ratio is 1.8X, and the mass is less than 1240g.
Table 1 below lists the actual parameters of the individual lenses of this embodiment that meet the mathematical relationships described above:
TABLE 1
In addition, in some embodiments of the present utility model, the cylindrical lens group 100, the spherical lens group 200 and the thirteenth lens 113 are all optical glass lenses, and compared with plastic lenses, the optical glass lenses have a wide temperature application range, a simple structural form, greatly reduced processing difficulty, easy storage and reduced lens production cost.
The deformable lens provided by the utility model adopts an integrated design, achieves excellent super-cost performance such as high resolution, low respiration, low distortion, full picture, high magnification of 1.8X and the like while realizing small size, and can design and match bayonets of cameras of various brands on the market according to actual use requirements so as to realize personalized customization and universal matching.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a full-frame overlength burnt high magnification deformation camera lens which characterized in that: the lens comprises a cylindrical lens group (100) and a spherical lens group (200) which are sequentially arranged from an object side to an image side, and a thirteenth lens (113) arranged in the middle of the spherical lens group (200), wherein the thirteenth lens (113) is a negative focal power cylindrical lens positioned behind a diaphragm;
the cylindrical lens group (100) comprises a first lens (101), a second lens (102), a third lens (103), a fourth lens (104) and a fifth lens (105) which are sequentially arranged from an object side to an image side; 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 (200) comprises 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 fourteenth lens (114), and an nth lens which are sequentially arranged along a direction that the light path points to the image space, wherein N is a natural number greater than or equal to sixteen;
the power distribution of the first lens (101) to the nth lens satisfies the following relationship:
125mm<f(1～N)Y<140mm；
66mm<f(1～N)X<78mm；
1.75<f(1～N)Y/f(1～N)X<1.85；
-1.50<(f(4～9)Y/(f14～15)Y<-1.20；
7.50<f(1～3)X/f(4～5)Y<8.50；
-2.20<f(1～9)X/f(10～16)Y<-1.80；
wherein the curvature direction of the first lens (101) is X direction, Y is vertical X direction, f (m-N) X is the comprehensive optical focal length of the m-th lens to the N-th lens along X direction, f (m-N) Y is the comprehensive optical focal length of the m-th lens to the N-th lens along Y direction, and m < N < 1 > is less than or equal to N.
2. The full-frame ultralong Jiao Da magnification anamorphic lens of claim 1, wherein: the N is equal to sixteen, and the seventh lens (107), the eighth lens (108), the eleventh lens (111), the fourteenth lens (114) and the fifteenth lens (115) are spherical lenses with positive focal power; the sixth lens (106), the ninth lens (109), the tenth lens (110), the twelfth lens (112), and the sixteenth lens (116) are spherical lenses with negative focal power.
3. The full-frame ultralong Jiao Da magnification anamorphic lens of claim 2, wherein: the sixth lens (106), the seventh lens (107), the eighth lens (108) and the ninth lens (109) form a first focusing group, the fourteenth lens (114) and the fifteenth lens (115) form a second focusing group, and the first focusing group and the second focusing group are linked inner focusing groups.
4. The full-frame ultralong Jiao Da magnification anamorphic lens of claim 2, wherein: the eighth lens (108) and the ninth lens (109) are double-cemented spherical lenses, the tenth lens (110), the eleventh lens (111) and the twelfth lens (112) are triple-cemented lenses, and the double-cemented spherical lenses and the triple-cemented lenses are used for correcting optical chromatic aberration of the ultra-long focal length high-magnification anamorphic lens.
5. The full-frame ultralong Jiao Da magnification anamorphic lens of claim 1, wherein: the second lens (102) and the third lens (103) are double-cemented cylindrical lenses and are used for correcting optical chromatic aberration of the overlength Jiao Da multiplying power anamorphic lens.
6. The full-frame ultralong Jiao Da magnification anamorphic lens of claim 1, wherein: the fourth lens (104) and the fifth lens (105) are double-cemented cylindrical lenses and are used for correcting the optical chromatic aberration of the overlength Jiao Da multiplying power anamorphic lens.
7. The full-frame ultralong Jiao Da magnification anamorphic lens of any one of claims 1 to 6, wherein: the front end of the full-frame ultra-long focal large-magnification deformable lens is provided with a filter with the caliber of 82 mm.
8. The full-frame ultralong Jiao Da magnification anamorphic lens of claim 1, wherein: the Y-direction focal length of the full-frame super-long-focus high-magnification deformable lens is 135mm.
9. The full-frame ultralong Jiao Da magnification anamorphic lens of claim 1, wherein: the zoom ratio of the full-frame super-long-focus high-magnification anamorphic lens is 1.8X.
10. The full-frame ultralong Jiao Da magnification anamorphic lens of claim 1, wherein: the cylindrical lens group (100), the spherical lens group (200) and the thirteenth lens (113) are all optical glass lenses.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116953897A (en) * | 2023-09-20 | 2023-10-27 | 深圳市雷影光电科技有限公司 | Full-picture wide-angle anamorphic lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116953897A (en) * | 2023-09-20 | 2023-10-27 | 深圳市雷影光电科技有限公司 | Full-picture wide-angle anamorphic lens |
| CN116953897B (en) * | 2023-09-20 | 2023-12-05 | 深圳市雷影光电科技有限公司 | Full-picture wide-angle anamorphic lens |
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