A movie lens and an imaging device

Abstract

The present invention relates to the field of optics, and specifically to a movie lens and an imaging device. The movie lens includes a fixed lens group, a moving lens group, and a focusing lens group. The moving lens group and the focusing lens group move along the principal optical axis direction of the movie lens respectively. The moving lens group moves to adjust the focal length of the movie lens, and the focusing lens group moves to adjust the object distance of the movie lens. Through the arrangement of the three lens groups, the moving lens group moves to adjust the focal length of the movie lens and the focusing lens group moves to adjust the object distance of the movie lens, thereby realizing the adjustment of the object distance and the focal length of the movie lens, achieving the imaging effect of 8K for the movie lens, and increasing the applicable range of the movie lens.

Description

Technical Field

[0001] The present invention relates to the field of optics, and specifically to a movie lens and an imaging device. Background Art

[0002] A movie lens, as the name implies, is a lens used for movie shooting. Movie lenses have the top-notch optical quality, and the design of their mechanical structures also fully takes into account the professional needs of movie production. Since these lenses are tailor-made for the movie shooting environment, they may not be very suitable in other fields. Installing a focus gear ring and modifying the stepless aperture on a camera lens cannot turn it into a movie lens.

[0003] In response to the national action plan for the development of the ultra-high-definition video industry, following the overall technical route of "starting with 4K and taking into account 8K", lenses will also fully enter the ultra-high-definition era in the future.

[0004] Due to the large number of lenses in movie lenses, the imaging quality of movie lenses is usually low, and the breathing effect is obvious during the focusing process, and the applicable range of movie lenses is small. Summary of the Invention

[0005] The present invention will solve the existing technical problems and provide a movie lens and an imaging device. By setting three lens groups, moving the lens group to move and adjust the focal length of the movie lens and moving the focusing lens group to move and adjust the object distance of the movie lens, the adjustment of the object distance and focal length of the movie lens is realized, and the applicable range of the movie lens is increased.

[0006] The technical solution provided by the present invention is as follows:

[0007] A movie lens, the movie lens includes a fixed lens group, a moving lens group and a focusing lens group, the moving lens group and the focusing lens group respectively move along the main optical axis direction of the movie lens, the moving lens group moves to adjust the focal length of the movie lens, and the focusing lens group moves to adjust the object distance of the movie lens.

[0008] In this technical solution, by setting three lens groups, moving the lens group to move and adjust the focal length of the movie lens and moving the focusing lens group to move and adjust the object distance of the movie lens, the adjustment of the object distance and focal length of the movie lens is realized, the 8K imaging effect of the movie lens is achieved, and the applicable range of the movie lens is increased.

[0009] Preferably, the fixed lens group includes at least two fixed lens groups, and the moving lens group and / or the focusing lens group are arranged in the fixed lens group.

[0010] In this technical solution, when the moving lens group and / or the focusing lens group is / are arranged in the fixed lens group, the overall optical length of the movie lens is fixed, which facilitates the design of the movie lens and increases the reliability of the movement of the moving lens group and the focusing lens group at the same time.

[0011] Preferably, the moving lens group includes one or more moving lens clusters, and the moving lens clusters move along the principal optical axis direction of the movie lens.

[0012] and / or

[0013] The focusing lens group includes one or more focusing lens clusters, and the focusing lens clusters move along the principal optical axis direction of the movie lens.

[0014] In this technical solution, by arranging one or more moving lens clusters / focusing lens clusters, the zooming ability and focusing ability of the moving lens cluster or the focusing lens cluster are increased, the resolution of the movie lens is further increased, the 8K resolution of the movie lens is achieved, and the ultra-high resolution of the movie lens is achieved.

[0015] Preferably, the fixed lens group includes at least two fixed lens clusters;

[0016] A fixed lens cluster and / or a moving lens cluster is / are arranged between adjacent focusing lens clusters.

[0017] In this technical solution, by separately arranging two focusing lens clusters, the focusing ability of the focusing lens cluster for light is further increased, the chromatic aberration and spherical aberration of imaging are reduced, and then the imaging quality of the movie lens is increased, and the ultra-high resolution of the movie lens is achieved.

[0018] Preferably, at least one of the focusing lens clusters is located on the object side of one of the moving lens clusters.

[0019] In this technical solution, by defining the positions of the focusing lens cluster and the moving lens cluster, the ultra-high resolution of the movie lens is achieved when the overall optical length of the internal lens groups of the movie lens is relatively small, and at the same time, the spherical aberration and coma of imaging are reduced, and the reliability of imaging is increased.

[0020] Preferably, all the focusing lens clusters are located on the object side of all the moving lens clusters.

[0021] In this technical solution, when all the focusing lens clusters are arranged on the object side of the moving lens clusters, the spherical aberration and coma of imaging can be greatly reduced, and the reliability of imaging is increased.

[0022] Preferably, at least one of the focusing lens clusters is located on the image side of the moving lens cluster closest to the object side.

[0023] In this technical solution, through the above structural arrangement, after the mobile lens group is zoomed, it is further calibrated by the focusing lens group, reducing the overall optical length of the cine lens, also reducing the aberration and coma of the imaging, and increasing the reliability of the imaging.

[0024] Preferably, there is at most one focusing lens group between adjacent mobile lens groups.

[0025] In this technical solution, through the above structural arrangement, the influence of the mobile lens group on the mobile lens group on the object surface side after movement is reduced, facilitating the movement of the mobile lens group on the object surface side. Subsequently, the movement range of the mobile lens group on the object surface side is increased, then the movement range of the mobile lens group within the cine lens is increased, the zoom range of the cine lens is increased, and then the applicable range of the cine lens is increased.

[0026] Preferably, the number of lenses on the object surface side of the mobile lens group is less than the number of lenses on the image surface side.

[0027] In this technical solution, after the light passes through the mobile lens group, there are large aberration and coma in the light. Through the above structural arrangement, the aberration and coma of the imaging are further reduced, then the imaging power of the cine lens is increased, and the reliability of the imaging of the cine lens is increased.

[0028] Preferably, the difference between the number of lenses on the object surface side and the number of lenses on the image surface side of the mobile lens group is less than a preset number.

[0029] In this technical solution, through the above structural arrangement, the possibility of the focal lengths of the lens groups on the object surface side and the image surface side of the mobile lens group being too large or too small is reduced. Subsequently, the possibility of the lens thickness being too large is reduced, the overall optical length of the cine lens is reduced, and the aberration and coma of the imaging are also reduced. Then the imaging power of the cine lens is increased, and the reliability of the imaging of the cine lens is increased.

[0030] Preferably, the mobile lens group includes at least one cemented lens;

[0031] and / or

[0032] the focusing lens group includes at least one cemented lens.

[0033] In this technical solution, through the arrangement of the cemented lens, the chromatic aberration and astigmatism of the imaging are greatly improved, and the quality of the imaging is increased.

[0034] One of the purposes of the present invention is also to provide an imaging device, including: a cine lens; and an imaging element configured to receive an image formed by the cine lens.

[0035] Compared with the prior art, a cine lens and an imaging device provided by the present invention have the following beneficial effects:

[0036] 1. By setting up three lens groups, the moving lens group moves to adjust the focal length of the cine lens, and the focusing lens group moves to adjust the object distance of the cine lens. Subsequently, the adjustment of the object distance and focal length of the cine lens is achieved, increasing the applicable range of the cine lens.

[0037] 2. By separately setting two focusing lens groups, the focusing ability of the focusing lens group for light is further increased, the chromatic aberration and spherical aberration of the imaging are reduced. Subsequently, the imaging quality of the cine lens is increased, achieving the ultra-high resolution of the cine lens.

[0038] 3. After the light passes through the moving lens group, there are large spherical aberration and coma of the light. Through the setting of the above structure, the spherical aberration and coma of the imaging are further reduced. Subsequently, the imaging ability of the cine lens is increased, and the reliability of the cine lens imaging is increased.

[0039] 4. Through the setting of the above structure, the possibility that the focal lengths of the lens groups on the object surface side and image surface side of the moving lens group are too large or too small is reduced. Subsequently, the possibility that the lens thickness is too large is reduced, the overall relative optical length of the cine lens is reduced, and the spherical aberration and coma of the imaging are also reduced. Subsequently, the imaging ability of the cine lens is increased, and the reliability of the cine lens imaging is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of a cine lens and an imaging device in a clear and understandable manner in combination with the drawings.

[0041] Figure 1 are schematic structural diagrams of a cine lens of the present invention in the telephoto and wide-angle states respectively, with the object distances being at infinity and the near end respectively;

[0042] Figure 2 is the aberration diagram of a cine lens of the present invention in the telephoto state;

[0043] Figure 3 is the coma diagram of a cine lens of the present invention in the telephoto state;

[0044] Figure 4 is the aberration diagram of a cine lens of the present invention in the wide-angle state;

[0045] Figure 5 is the coma diagram of a cine lens of the present invention in the wide-angle state;

[0046] Figure 6 are schematic structural diagrams of another cine lens of the present invention in the telephoto and wide-angle states respectively, with the object distances being at infinity and the near end respectively;

[0047] Figure 7 is the aberration diagram of another cine lens of the present invention in the telephoto state;

[0048] Figure 8 is the coma diagram of another telephoto state of the movie lens of the present invention;

[0049] Figure 9 is the aberration diagram of another wide-angle state of the movie lens of the present invention;

[0050] Figure 10 is the coma diagram of another wide-angle state of the movie lens of the present invention;

[0051] Figure 11 is the structural schematic diagram of yet another movie lens in telephoto and wide-angle states respectively, with object distances at infinity and the near end respectively;

[0052] Figure 12 is the aberration diagram of yet another telephoto state of the movie lens of the present invention;

[0053] Figure 13 is the coma diagram of yet another telephoto state of the movie lens of the present invention;

[0054] Figure 14 is the aberration diagram of yet another wide-angle state of the movie lens of the present invention;

[0055] Figure 15 is the coma diagram of yet another wide-angle state of the movie lens of the present invention;

[0056] Figure 16 is the structural schematic diagram of still another movie lens in telephoto and wide-angle states respectively, with object distances at infinity and the near end respectively;

[0057] Figure 17 is the aberration diagram of still another telephoto state of the movie lens of the present invention;

[0058] Figure 18 is the coma diagram of still another telephoto state of the movie lens of the present invention;

[0059] Figure 19 is the aberration diagram of still another wide-angle state of the movie lens of the present invention;

[0060] Figure 20 is the coma diagram of still another wide-angle state of the movie lens of the present invention;

[0061] Figure 21 is the structural schematic diagram of yet yet another movie lens in telephoto and wide-angle states respectively, with object distances at infinity and the near end respectively;

[0062] Figure 22 is the aberration diagram of yet yet another telephoto state of the movie lens of the present invention;

[0063] Figure 23It is another coma diagram of the telephoto state of the movie lens of the present invention;

[0064] Figure 24 It is another aberration diagram of the wide-angle state of the movie lens of the present invention;

[0065] Figure 25 It is another coma diagram of the wide-angle state of the movie lens of the present invention;

[0066] Figure 26 It is another structural schematic diagram of the movie lens of the present invention in the telephoto and wide-angle states respectively, with the object distances at infinity and the near end respectively;

[0067] Figure 27 It is another aberration diagram of the telephoto state of the movie lens of the present invention;

[0068] Figure 28 It is another coma diagram of the telephoto state of the movie lens of the present invention;

[0069] Figure 29 It is another aberration diagram of the wide-angle state of the movie lens of the present invention;

[0070] Figure 30 It is another coma diagram of the wide-angle state of the movie lens of the present invention.

[0071] Explanation of the reference numerals in the drawings: A1, the first fixed lens group; A2, the second fixed lens group; A3, the third fixed lens group; A4, the fourth fixed lens group; B1, the first focusing lens group; B2, the second focusing lens group; C1, the first moving lens group; C2, the second moving lens group; a1, the first fixed lens; a2, the second fixed lens; a3, the third fixed lens; a4, the fourth fixed lens; a5, the fifth fixed lens; a6, the sixth fixed lens; a7, the seventh fixed lens; a8, the eighth fixed lens; a9, the ninth fixed lens; a10, the tenth fixed lens; a11, the eleventh fixed lens; a12, the twelfth fixed lens; a13, the thirteenth fixed lens; a14, the fourteenth fixed lens; a15, the fifteenth fixed lens; a16, the sixteenth fixed lens; a17, the seventeenth fixed lens; a18, the eighteenth fixed lens; a19, the nineteenth fixed lens; b1, the first focusing lens; b2, the second focusing lens; b3, the third focusing lens; b4, the fourth focusing lens; b5, the fifth focusing lens; b6, the sixth focusing lens; b7, the seventh focusing lens; c1, the first moving lens; c2, the second moving lens; c3, the third moving lens; c4, the fourth moving lens; c5, the fifth moving lens; STO, the aperture. Detailed implementation manners

[0072] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0073] For the sake of simplicity of the drawings, only the parts related to the invention are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, in some drawings, for components with the same structure or function, only one of them is schematically shown, or only one of them is labeled. In this article, "one" not only means "only this one", but also can mean "more than one" situation.

[0074] Embodiment 1

[0075] As Figure 1 、 6 、11, 16, 21, 26 show, a movie lens, the movie lens includes a fixed lens group, a moving lens group and a focusing lens group, the moving lens group and the focusing lens group respectively move along the main optical axis direction of the movie lens, the moving lens group moves to adjust the focal length of the movie lens, and the focusing lens group moves to adjust the object distance of the movie lens.

[0076] In this embodiment, through the setting of the three lens groups, the moving lens group moves to adjust the focal length of the movie lens and the focusing lens group moves to adjust the object distance of the movie lens, thereby realizing the adjustment of the object distance and focal length of the movie lens, realizing the imaging effect of 8K of the movie lens, and increasing the applicable range of the movie lens.

[0077] The fixed lens group includes at least two fixed lens groups, and the moving lens group and / or the focusing lens group are arranged in the fixed lens group.

[0078] In this embodiment, when the moving lens group and / or the focusing lens group are arranged in the fixed lens group, the optical total length of the movie lens is fixed, which is convenient for the design of the movie lens, and at the same time increases the reliability of the movement of the moving lens group and the focusing lens group.

[0079] The moving lens group includes one or more moving lens groups, and the moving lens group moves along the main optical axis direction of the movie lens;

[0080] and / or

[0081] The focusing lens group includes one or more focusing lens groups, and the focusing lens group moves along the main optical axis direction of the movie lens.

[0082] In this embodiment, by setting one or more moving lens groups / focusing lens groups, the zooming ability and focusing ability of the moving lens group or the focusing lens group are increased, the resolution of the movie lens is further increased, the 8K resolution of the movie lens is achieved, and the ultra-high resolution of the movie lens is achieved.

[0083] The fixed lens group at least includes two fixed lens groups;

[0084] A fixed lens group and / or a moving lens group is provided between adjacent focusing lens groups.

[0085] In this embodiment, by separately setting two focusing lens groups, the focusing ability of the focusing lens group on light is further increased, the aberration and coma of imaging are reduced, and then the imaging quality of the movie lens is increased, and the ultra-high resolution of the movie lens is achieved.

[0086] At least one of the focusing lens groups is located on the object side of one of the moving lens groups.

[0087] In this embodiment, by limiting the positions of the focusing lens group and the moving lens group, the ultra-high resolution of the movie lens is achieved while the overall optical length of the internal groups of the movie lens is relatively small, and at the same time, the aberration and coma of imaging are reduced, and the imaging reliability is increased.

[0088] All the focusing lens groups are located on the object side of all the moving lens groups.

[0089] When all the focusing lens groups are arranged on the object side of the moving lens group, the aberration and coma of imaging can be greatly reduced, and the imaging reliability is increased.

[0090] At least one of the focusing lens groups is located on the image side of the moving lens group closest to the object side.

[0091] In this embodiment, through the setting of the above structure, after the moving lens group is zoomed, it is further adjusted by the focusing lens group, the overall optical length of the movie lens is reduced, the aberration and coma of imaging are also reduced, and the imaging reliability is increased.

[0092] There is at most one focusing lens group between adjacent moving lens groups.

[0093] Through the setting of the above structure, the influence of the moving lens group on the object side of the moving lens group after movement is reduced, which facilitates the movement of the moving lens group on the object side. Then the moving range of the moving lens group on the object side is increased, and then the moving range of the moving lens group in the movie lens is increased, the zoom range of the movie lens is increased, and then the applicable range of the movie lens is increased.

[0094] The number of lenses on the object side of the moving lens group is less than that on the image side.

[0095] After the light passes through the moving lens group, there are large aberrations and coma of the light. Through the setting of the above structure, the aberrations and coma of imaging are further reduced, thereby increasing the imaging power of the cine lens and the reliability of the cine lens imaging.

[0096] The difference between the number of lenses on the object side and the number of lenses on the image side of the moving lens group is less than a preset number. Specifically, the preset number is less than or equal to 3.

[0097] Through the setting of the above structure, the possibility of the focal lengths of the lens groups on the object side and the image side of the moving lens group being too large or too small is reduced, thereby reducing the possibility of the lens thickness being too large, reducing the relevant optical total length of the cine lens, and also reducing the aberrations and coma of imaging, thereby increasing the imaging power of the cine lens and the reliability of the cine lens imaging.

[0098] At least one cemented lens is included in the moving lens group;

[0099] and / or

[0100] At least one cemented lens is included in the focusing lens group.

[0101] In this embodiment, through the setting of the cemented lens, the chromatic aberration and astigmatism of imaging are greatly improved, and the imaging quality is increased.

[0102] Embodiment 2

[0103] As Figures 1 - 5 shown, a cine lens, which sequentially includes from the object side to the image side: a first fixed lens group A1 with positive optical power, a first focusing lens group B1 with negative optical power, a second fixed lens group A2 with positive optical power, a first moving lens group C1 with negative optical power, and a third fixed lens group A3 with positive optical power.

[0104] The first fixed lens group A1 is a first fixed lens a1 with positive optical power.

[0105] The first focusing lens group B1 sequentially includes from the object side to the image side: a first focusing lens b1 with positive optical power, a second focusing lens b2 with negative optical power, and a third focusing lens b3 with negative optical power; the first focusing lens b1 and the second focusing lens b2 are cemented.

[0106] The second fixed lens group A2 includes, in order from the object side to the image side: a second fixed lens a2 with positive refractive power, a third fixed lens a3 with positive refractive power, a fourth fixed lens a4 with negative refractive power, a fifth fixed lens a5 with negative refractive power, and a sixth fixed lens a6 with positive refractive power; the third fixed lens a3 and the fourth fixed lens a4 are cemented together, and the fifth fixed lens a5 and the sixth fixed lens a6 are cemented together.

[0107] The first moving lens group C1 includes, in order from the object side to the image side: a first moving lens c1 with negative refractive power, a second moving lens c2 with negative refractive power, and a third moving lens c3 with positive refractive power; the second moving lens c2 and the third moving lens c3 are cemented together.

[0108] The third fixed lens group A3 includes, in order from the object side to the image side:

[0109] a seventh fixed lens a7 with negative refractive power, an eighth fixed lens a8 with positive refractive power, a ninth fixed lens a9 with positive refractive power, a tenth fixed lens a10 with negative refractive power, an eleventh fixed lens a11 with negative refractive power, a twelfth fixed lens a12 with positive refractive power, a thirteenth fixed lens a13 with positive refractive power, a fourteenth fixed lens a14 with negative refractive power, a fifteenth fixed lens a15 with positive refractive power, a sixteenth fixed lens a16 with negative refractive power, a seventeenth fixed lens a17 with positive refractive power, an eighteenth fixed lens a18 with negative refractive power, and a nineteenth fixed lens a19 with positive refractive power; the seventh fixed lens a7 and the eighth fixed lens a8 are cemented together, the ninth fixed lens a9 and the tenth fixed lens a10 are cemented together, the eleventh fixed lens a11 and the twelfth fixed lens a12 are cemented together, the fourteenth fixed lens a14 and the fifteenth fixed lens a15 are cemented together, and the seventeenth fixed lens a17 and the eighteenth fixed lens a18 are cemented together.

[0110] The aperture STO is disposed between the tenth fixed lens a10 and the eleventh fixed lens a11.

[0111] The basic lens data of the movie lens of this embodiment are shown in Table 1, and the variable parameters in Table 1 are shown in Tables 2 and 3.

[0112] In the surface number column, the surface numbers are shown when the surface on the object side is set as the first surface and the numbers are incremented one by one toward the image side; in the surface type column, the surface type of a certain lens is shown; in the curvature radius column, the curvature radius of a certain lens is shown. When the curvature radius is positive, it indicates that the surface is curved toward the object side, and when the curvature radius is negative, it indicates that the surface is curved toward the image side; in the center thickness column, the axial surface interval between each surface and the adjacent surface on its image side is shown; in the refractive index column, the refractive index of a certain lens is shown; and in the Abbe number column, the Abbe number of a certain lens is shown.

[0113] In Table 2, each column represents the specific values of various variable parameters in different states when the movie lens moves with the first moving lens group C1; in Table 3, each column represents the specific values of various variable parameters in different states when the movie lens moves with the first focusing lens group B1 and the focal length of the movie lens.

[0114]

Table 1

[0115]

[0116]

[0117]

Table 2

[0118] POS1 POS2 POS3 POS4 D1 INF INF INF INF D2 44.74 44.74 44.74 44.74 D3 1 1 1 1 D4 66.31 77.31 86.31 90.16 D5 58.64 47.64 38.64 34.79

[0119]

Table 3

[0120] POS1 POS5 POS6 POS7 D1 INF 7511 3511 1311 D2 44.74 34 24.1 1 D3 1 11.74 21.64 44.74 D4 66.31 66.31 66.31 66.31 D5 58.64 58.64 58.64 58.64

[0121] In this embodiment, fw = 140 mm, ft = 200 mm, fno = 2.52, TTL = 483.47 mm.

[0122] Among them, fw is the focal length of the wide-angle end of the movie lens, ft is the focal length of the telephoto end of the movie lens, fno is the aperture number of the movie lens, and TTL is the total optical length of the movie lens.

[0123] YC1 = 23.85 mm; YC1 / TTL = 0.049.

[0124] YB1 = 43.74 mm, YB1 / YC1 = 1.83.

[0125] Among them, YC1 is the moving distance of the first moving lens group C1, and YB1 is the moving distance of the first focusing lens group B1.

[0126] fB1 = -170.26 mm, fB1 / fw = -1.22.

[0127] Among them, fB1 is the focal length of the first focusing lens group B1.

[0128] fC1 = -66.53 mm fC1 / fw = -0.475.

[0129] Among them, fC1 is the focal length of the first moving lens group C1.

[0130] LA3 = 135.18 mm, LA3 / TTL = 0.28.

[0131] Among them, LA3 is the total optical length of the third fixed lens group A3.

[0132] Embodiment 3

[0133] As Figures 6 - 10 shown, a movie lens, from the object side to the image side, successively includes: a first fixed lens group A1 with positive refractive power, a first focusing lens group B1 with negative refractive power, a second fixed lens group A2 with positive refractive power, a second focusing lens group B2 with positive refractive power, a first moving lens group C1 with negative refractive power, a second moving lens group C2 with positive refractive power, and a third fixed lens group A3 with positive refractive power.

[0134] The first fixed lens group A1 is a first fixed lens a1 with positive refractive power.

[0135] The first focusing lens group B1, from the object side to the image side, successively includes: a first focusing lens b1 with positive refractive power, a second focusing lens b2 with negative refractive power, and a third focusing lens b3 with negative refractive power; the first focusing lens b1 and the second focusing lens b2 are cemented together.

[0136] The second fixed lens group A2, from the object side to the image side, successively includes: a second fixed lens a2 with positive refractive power, a third fixed lens a3 with positive refractive power, and a fourth fixed lens a4 with negative refractive power; the third fixed lens a3 and the fourth fixed lens a4 are cemented together.

[0137] The second focusing lens group B2, from the object side to the image side, successively includes: a fourth focusing lens b4 with negative refractive power and a fifth focusing lens b5 with positive refractive power; the fourth focusing lens b4 and the fifth focusing lens b5 are cemented together.

[0138] The first moving lens group C1, from the object side to the image side, successively includes: a first moving lens c1 with negative refractive power, a second moving lens c2 with negative refractive power, and a third moving lens c3 with positive refractive power; the second moving lens c2 and the third moving lens c3 are cemented together.

[0139] The second moving lens group C2, from the object side to the image side, successively includes: a fourth moving lens c4 with negative refractive power and a fifth moving lens c5 with positive refractive power; the fourth moving lens c4 and the fifth moving lens c5 are cemented together.

[0140] The third fixed lens group A3, from the object side to the image side, successively includes:

[0141] The fifth fixed lens a5 with positive optical power, the sixth fixed lens a6 with negative optical power, the seventh fixed lens a7 with negative optical power, the eighth fixed lens a8 with positive optical power, the ninth fixed lens a9 with positive optical power, the tenth fixed lens a10 with negative optical power, the eleventh fixed lens a11 with positive optical power, the twelfth fixed lens a12 with negative optical power, the thirteenth fixed lens a13 with positive optical power, the fourteenth fixed lens a14 with negative optical power, the fifteenth fixed lens a15 with positive optical power; The fifth fixed lens a5 is cemented to the sixth fixed lens a6, the seventh fixed lens a7 and the eighth fixed lens a8 are cemented, the tenth fixed lens a10 and the eleventh fixed lens a11 are cemented, and the thirteenth fixed lens a13 and the fourteenth fixed lens a14 are cemented.

[0142] The diaphragm STO is disposed between the sixth fixed lens a6 and the seventh fixed lens a7.

[0143] The basic lens data of the cine lens of this embodiment are shown in Table 4, and the variable parameters in Table 4 are shown in Tables 5 and 6.

[0144] In the surface number column, the surface numbers are shown when the object-side surface is set as the first surface and the numbers are incremented one by one toward the image side; in the surface type column, the surface type of a certain lens is shown; in the radius of curvature column, the radius of curvature of a certain lens is shown. When the radius of curvature is positive, it indicates that the surface is curved toward the object side, and when the radius of curvature is negative, it indicates that the surface is curved toward the image side; in the central thickness column, the axial surface interval between each surface and the adjacent surface on its image side is shown; in the refractive index column, the refractive index of a certain lens is shown; in the Abbe number column, the Abbe number of a certain lens is shown.

[0145] In Table 5, each column represents the specific values of each variable parameter in different states when the cine lens moves with the first moving lens group C1 and the second moving lens group C2; in Table 6, each column represents the specific values of each variable parameter in different states when the cine lens moves with the first focusing lens group B1 and the second focusing lens group B2, as well as the focal length of the cine lens.

[0146]

Table 4

[0147]

[0148]

[0149]

Table 5

[0150] POS1 POS2 POS3 POS4 POS5 D1 INF INF INF INF INF D2 19.32 19.32 19.32 19.32 19.32 D3 3.35 3.35 3.35 3.35 3.35 D4 11.93 11.93 11.93 11.93 11.93 D5 0 0 0 0 0 D6 5.25 41.29 72.65 97.06 116.25 D7 32.8 34.73 30.97 20.73 1.3 D8 83.64 45.67 18.07 3.9 4.14

[0151]

Table 6

[0152]

[0153]

[0154] In this embodiment, fw = 72 mm, ft = 290 mm, fno = 2.88, and TTL = 446.01 mm.

[0155] Among them, fw is the focal length of the wide-angle end of the cine lens, ft is the focal length of the telephoto end of the cine lens, fno is the f-number of the cine lens, and TTL is the total optical length of the cine lens.

[0156] YC1 = 111 mm, YC2 = 79.5 mm; YC1 / YC2 = 1.4.

[0157] Among them, YC1 is the moving distance of the first moving lens group C1, and YC2 is the moving distance of the second moving lens group C2.

[0158] YB1 = 9.23 mm, YB2 = 6.04 mm, YB1 / YB2 = 1.53.

[0159] Among them, YB1 is the moving distance of the first focusing lens group B1, and YB2 is the moving distance of the second focusing lens group B2.

[0160] fB1 = -104.93 mm, fB2 = 290.05 mm, fB2 / fB1 = -2.76.

[0161] Among them, fB1 is the focal length of the first focusing lens group B1, and fB2 is the focal length of the second focusing lens group B2.

[0162] fC1 = -55.93 mm, fC2 = 223.67 mm, fC2 / fC1 = -4.

[0163] Among them, fC1 is the focal length of the first moving lens group C1, and fC2 is the focal length of the second moving lens group C2.

[0164] LA3 = 150 mm, LA3 / TTL = 0.336.

[0165] Among them, LA3 is the total optical length of the third fixed lens group A3.

[0166] Embodiment 4

[0167] As Figures 11 - 15 shown, a cine lens, which successively includes from the object side to the image side: a first fixed lens group A1 with positive optical power, a first focusing lens group B1 with negative optical power, a second fixed lens group A2 with positive optical power, a first moving lens group C1 with negative optical power, a second moving lens group C2 with positive optical power, a third fixed lens group A3 with positive optical power, and a second focusing lens group B2 with positive optical power.

[0168] The first fixed lens group A1 is a first fixed lens a1 with positive optical power.

[0169] The first focusing lens group B1 includes, in order from the object side to the image side: a first focusing lens b1 with positive optical power, a second focusing lens b2 with negative optical power, and a third focusing lens b3 with negative optical power; the first focusing lens b1 and the second focusing lens b2 are cemented together.

[0170] The second fixed lens group A2 includes, in order from the object side to the image side: a second fixed lens a2 with positive optical power, a third fixed lens a3 with positive optical power, a fourth fixed lens a4 with negative optical power, a fifth fixed lens a5 with negative optical power, and a sixth fixed lens a6 with positive optical power; the third fixed lens a3 and the fourth fixed lens a4 are cemented together, and the fifth fixed lens a5 and the sixth fixed lens a6 are cemented together.

[0171] The first moving lens group C1 includes, in order from the object side to the image side: a first moving lens c1 with negative optical power, a second moving lens c2 with negative optical power, and a third moving lens c3 with positive optical power; the second moving lens c2 and the third moving lens c3 are cemented together.

[0172] The second moving lens group C2 includes, in order from the object side to the image side: a fourth moving lens c4 with negative optical power and a fifth moving lens c5 with positive optical power; the fourth moving lens c4 and the fifth moving lens c5 are cemented together.

[0173] The third fixed lens group A3 includes, in order from the object side to the image side:

[0174] a seventh fixed lens a7 with positive optical power, an eighth fixed lens a8 with negative optical power, a ninth fixed lens a9 with negative optical power, a tenth fixed lens a10 with positive optical power, an eleventh fixed lens a11 with positive optical power, a twelfth fixed lens a12 with negative optical power, and a thirteenth fixed lens a13 with positive optical power; the seventh fixed lens a7 and the eighth fixed lens a8 are cemented together, the ninth fixed lens a9 and the tenth fixed lens a10 are cemented together, and the twelfth fixed lens a12 and the thirteenth fixed lens a13 are cemented together.

[0175] The aperture STO is disposed between the eighth fixed lens a8 and the ninth fixed lens a9.

[0176] The second focusing lens group B2 includes, in order from the object side to the image side: a fourth focusing lens b4 with negative optical power, a fifth focusing lens b5 with positive optical power, a sixth focusing lens b6 with negative optical power, and a seventh focusing lens b7 with positive optical power; the fifth focusing lens b5 and the sixth focusing lens b6 are cemented together.

[0177] The basic lens data of the movie lens of this embodiment are shown in Table 7, and the variable parameters in Table 7 are shown in Tables 8 and 9.

[0178] In the surface number column, the surface numbers are shown when the object-side surface is set as the first surface and the numbers are incremented one by one toward the image side; in the surface type column, the surface type of a certain lens is shown; in the curvature radius column, the curvature radius of a certain lens is shown. When the curvature radius is positive, it indicates that the surface is curved toward the object side, and when the curvature radius is negative, it indicates that the surface is curved toward the image side; in the center thickness column, the axial surface interval between each surface and the adjacent surface on its image side is shown; in the refractive index column, the refractive index of a certain lens is shown; in the Abbe number column, the Abbe number of a certain lens is shown.

[0179] In Table 8, each column represents the specific values of each variable parameter in different states when the movie lens moves in the first moving lens group C1 and the second moving lens group C2; in Table 9, each column represents the specific values of each variable parameter in different states when the movie lens moves in the first focusing lens group B1 and the second focusing lens group B2, as well as the focal length of the movie lens.

[0180]

Table 7

[0181]

[0182]

[0183]

Table 8

[0184]

[0185]

[0186]

Table 9

[0187] POS1 POS6 POS7 POS8 D1 INF 7511 3511 1311 D2 48.2 37.63 27.16 1 D3 1 11.56 22.04 48.2 D4 14 14 14 14 D5 128.4 128.4 128.4 128.4 D6 20.29 20.29 20.29 20.29 D7 29.56 25.86 25.59 25.56 D8 13.8067 17.4967 17.7767 17.8067

[0188] In this embodiment, fw = 74 mm, ft = 285 mm, fno = 2.4 to 2.69, TTL = 536.11 mm.

[0189] Among them, fw is the focal length of the wide-angle end of the movie lens, ft is the focal length of the telephoto end of the movie lens, fno is the aperture number of the movie lens, and TTL is the total optical length of the movie lens.

[0190] YC1 = 84.41 mm, YC2 = 62.27 mm; YC1 / YC2 = 1.36.

[0191] Among them, YC1 is the moving distance of the first moving lens group C1, and YC2 is the moving distance of the second moving lens group C2.

[0192] YB1 = 47.2 mm, YB2 = 4 mm, YB1 / YB2 = 11.8.

[0193] Among them, YB1 is the moving distance of the first focusing lens group B1, and YB2 is the moving distance of the second focusing lens group B2.

[0194] fB1 = -231.89 mm, fB2 = 115.32 mm, fB1 / fB2 = -2.01.

[0195] Among them, fB1 is the focal length of the first focusing lens group B1, and fB2 is the focal length of the second focusing lens group B2.

[0196] fC1 = -75.55 mm, fC2 = -183.41 mm, fC1 / fC2 = -0.272.

[0197] Among them, fC1 is the focal length of the first moving lens group C1, and fC2 is the focal length of the second moving lens group C2.

[0198] (LA3 + LB2)max = 146.06 mm, (LA3 + LB2)max / TTL = 0.355.

[0199] Among them, LA3 is the total optical length of the third fixed lens group A3, LB2 is the total optical length of the second focusing lens group B2, and (LA3 + LB2)max is the maximum total optical length of the third fixed lens group A3 and the second focusing lens group B2.

[0200] Example 5

[0201] As Figures 16 - 20 shown, a movie lens, from the object side to the image side, successively includes: a first moving lens group C1 with positive optical power, a first focusing lens group B1 with negative optical power, a first fixed lens group A1 with positive optical power, a second moving lens group C2 with negative optical power, and a second fixed lens group A2 with positive optical power.

[0202] The first moving lens group C1 is a first moving lens c1 with positive optical power.

[0203] The first focusing lens group B1, from the object side to the image side, successively includes: a first focusing lens b1 with positive optical power, a second focusing lens b2 with negative optical power, and a third focusing lens b3 with negative optical power; the first focusing lens b1 and the second focusing lens b2 are cemented.

[0204] The first fixed lens group A1 includes, in order from the object side to the image side: a first fixed lens a1 with positive optical power, a second fixed lens a2 with positive optical power, a third fixed lens a3 with negative optical power, a fourth fixed lens a4 with negative optical power, and a fifth fixed lens a5 with positive optical power; the second fixed lens a2 and the third fixed lens a3 are cemented together, and the fourth fixed lens a4 and the fifth fixed lens a5 are cemented together.

[0205] The second moving lens group C2 includes, in order from the object side to the image side: a second moving lens c2 with negative optical power, a third moving lens c3 with negative optical power, and a fourth moving lens c4 with positive optical power; the third moving lens c3 and the fourth moving lens c4 are cemented together.

[0206] The second fixed lens group A2 includes, in order from the object side to the image side:

[0207] a sixth fixed lens a6 with negative optical power, a seventh fixed lens a7 with positive optical power, an eighth fixed lens a8 with positive optical power, a ninth fixed lens a9 with negative optical power, a tenth fixed lens a10 with negative optical power, an eleventh fixed lens a11 with positive optical power, a twelfth fixed lens a12 with positive optical power, a thirteenth fixed lens a13 with negative optical power, a fourteenth fixed lens a14 with positive optical power, a fifteenth fixed lens a15 with negative optical power, a sixteenth fixed lens a16 with positive optical power, a seventeenth fixed lens a17 with negative optical power, and an eighteenth fixed lens a18 with positive optical power; the sixth fixed lens a6 and the seventh fixed lens a7 are cemented together, the eighth fixed lens a8 and the ninth fixed lens a9 are cemented together, the tenth fixed lens a10 and the eleventh fixed lens a11 are cemented together, the thirteenth fixed lens a13 and the fourteenth fixed lens a14 are cemented together, and the sixteenth fixed lens a16 and the seventeenth fixed lens a17 are cemented together.

[0208] The aperture stop STO is disposed between the ninth fixed lens a9 and the tenth fixed lens a10.

[0209] The basic lens data of the movie lens in this embodiment are shown in Table 10, and the variable parameters in Table 10 are shown in Tables 11 and 12.

[0210] In the surface number column, the surface numbers are shown when the surface on the object side is set as the first surface and the numbers increase one by one toward the image side; in the surface type column, the surface type of a certain lens is shown; in the curvature radius column, the curvature radius of a certain lens is shown. When the curvature radius is positive, it indicates that the surface is curved toward the object side, and when the curvature radius is negative, it indicates that the surface is curved toward the image side; in the center thickness column, the axial surface interval between each surface and the adjacent surface on its image side is shown; in the refractive index column, the refractive index of a certain lens is shown; and in the Abbe number column, the Abbe number of a certain lens is shown.

[0211] In Table 11, each column represents the specific values of various variable parameters in different states when the movie lens moves with the first moving lens group C1 and the second moving lens group C2; in Table 12, each column represents the specific values of various variable parameters in different states when the movie lens moves with the first focusing lens group B1 and the focal length of the movie lens.

[0212]

Table 10

[0213]

[0214]

[0215]

[0216]

Table 11

[0217] POS1 POS2 POS3 POS4 D1 INF INF INF INF D2 1 9 9 9 D3 99.05 99.05 99.05 99.05 D4 1 1 1 1 D5 34.82 44.82 52.82 57.17 D6 34.65 24.65 16.65 12.3

[0218]

Table 12

[0219] POS1 POS5 POS6 POS7 D1 INF 7511 3511 1311 D2 1 1 1 1 D3 99.05 75.28 52.97 1 D4 1 24.77 47.08 99.05 D5 34.82 34.82 34.82 34.82 D6 34.65 34.65 34.65 34.65

[0220] In this embodiment, fw = 140 mm, ft = 200 mm, fno = 2.53, TTL = 486.39 mm.

[0221] Among them, fw is the focal length of the wide-angle end of the movie lens, ft is the focal length of the telephoto end of the movie lens, fno is the aperture number of the movie lens, and TTL is the total optical length of the movie lens.

[0222] YC1 = 8 mm, YC2 = 22.35 mm; YC1 / YC2 = 0.358.

[0223] Among them, YC1 is the moving distance of the first moving lens group C1, and YC2 is the moving distance of the second moving lens group C2.

[0224] YB1 = 98.05 mm, YB1 / YC1 = 12.26.

[0225] Among them, YB1 is the moving distance of the first focusing lens group B1.

[0226] fB1 = -362.47 mm, fB1 / fw = 2.59.

[0227] Among them, fB1 is the focal length of the first focusing lens group B1.

[0228] fC1 = 3250.56 mm, fC2 = -62.8 mm, fC1 / fC2 = -51.76.

[0229] Among them, fC1 is the focal length of the first moving lens group C1, and fC2 is the focal length of the second moving lens group C2.

[0230] LA2 = 147.24 mm, LA2 / TTL = 0.303.

[0231] Among them, LA2 is the total optical length of the second fixed lens group A2.

[0232] Embodiment 6

[0233] As Figures 21 - 25 shown, a movie lens, from the object side to the image side, successively includes: a first fixed lens group A1 with positive refractive power, a first focusing lens group B1 with negative refractive power, a second fixed lens group A2 with positive refractive power, a first moving lens group C1 with negative refractive power, a second focusing lens group B2 with negative refractive power, a second moving lens group C2 with positive refractive power, a diaphragm STO, and a third fixed lens group A3 with positive refractive power.

[0234] The first fixed lens group A1 is a first fixed lens a1 with positive refractive power.

[0235] The first focusing lens group B1, from the object side to the image side, successively includes: a first focusing lens b1 with positive refractive power, a second focusing lens b2 with negative refractive power, and a third focusing lens b3 with negative refractive power; the first focusing lens b1 and the second focusing lens b2 are cemented.

[0236] The second fixed lens group A2, from the object side to the image side, successively includes: a second fixed lens a2 with positive refractive power, a third fixed lens a3 with positive refractive power, a fourth fixed lens a4 with negative refractive power, a fifth fixed lens a5 with negative refractive power, and a sixth fixed lens a6 with positive refractive power; the third fixed lens a3 and the fourth fixed lens a4 are cemented, and the fifth fixed lens a5 and the sixth fixed lens a6 are cemented.

[0237] The first moving lens group C1, from the object side to the image side, successively includes: a first moving lens c1 with negative refractive power, a second moving lens c2 with negative refractive power, and a third moving lens c3 with positive refractive power; the second moving lens c2 and the third moving lens c3 are cemented.

[0238] The second focusing lens group B2, from the object side to the image side, successively includes: a fourth focusing lens b4 with negative refractive power, and a fifth focusing lens b5 with positive refractive power; the fourth focusing lens b4 and the fifth focusing lens b5 are cemented.

[0239] The second moving lens group C2, from the object side to the image side, successively includes: a fourth moving lens c4 with positive refractive power, and a fifth moving lens c5 with negative refractive power; the fourth moving lens c4 and the fifth moving lens c5 are cemented.

[0240] The third fixed lens group A3 includes, in order from the object side to the image side:

[0241] The seventh fixed lens a7 with negative optical power, the eighth fixed lens a8 with positive optical power, the ninth fixed lens a9 with positive optical power, the tenth fixed lens a10 with negative optical power, the eleventh fixed lens a11 with positive optical power, the twelfth fixed lens a12 with negative optical power, the thirteenth fixed lens a13 with negative optical power, the fourteenth fixed lens a14 with positive optical power, and the fifteenth fixed lens a15 with positive optical power; the seventh fixed lens a7 and the eighth fixed lens a8 are cemented together, the tenth fixed lens a10 and the eleventh fixed lens a11 are cemented together, and the twelfth fixed lens a12 and the thirteenth fixed lens a13 are cemented together.

[0242] The basic lens data of the movie lens in this embodiment are shown in Table 13, and the variable parameters in Table 13 are shown in Tables 14 and 15.

[0243] In the surface number column, the surface numbers are shown when the surface on the object side is set as the first surface and the numbers increase one by one toward the image side; in the surface type column, the surface type of a certain lens is shown; in the curvature radius column, the curvature radius of a certain lens is shown. When the curvature radius is positive, it indicates that the surface is curved toward the object side, and when the curvature radius is negative, it indicates that the surface is curved toward the image side; in the center thickness column, the axial spacing between each surface and the adjacent surface on its image side is shown; in the refractive index column, the refractive index of a certain lens is shown; and in the Abbe number column, the Abbe number of a certain lens is shown.

[0244] In Table 14, each column represents the specific values of each variable parameter in different states when the first moving lens group C1 and the second moving lens group C2 of the movie lens move; in Table 15, each column represents the specific values of each variable parameter in different states when the first focusing lens group B1 and the second focusing lens group B2 of the movie lens move, as well as the focal length of the movie lens.

[0245]

Table 13

[0246]

[0247]

[0248]

Table 14

[0249] POS1 POS2 POS3 POS4 D1 INF INF INF INF D2 49.84 49.84 49.84 49.84 D3 1 1 1 1 D4 69.34 75.56 81.58 86.23 D5 17.89 11.67 5.65 1 D6 3.37 3.37 3.37 3.37 D7 7 7 7 7 D8 9.16 5.84 2.89 1 D9 1 2.89 5.84 9.16

[0250]

Table 15

[0251] POS1 POS5 POS6 POS7 D1 INF 7511 3511 1311 D2 49.84 42.94 35.93 17.99 D3 1 7.91 14.91 32.85 D4 69.34 69.34 69.34 69.34 D5 17.89 17.89 17.89 17.89 D6 3.37 4.35 5.53 9.37 D7 7 6.01 4.84 1 D8 9.16 9.16 9.16 9.16 D9 1 1 1 1

[0252] In this embodiment, fw = 150 mm, ft = 200 mm, fno = 2.57, and TTL = 484.3 mm.

[0253] Among them, fw is the focal length of the wide-angle end of the cine lens, ft is the focal length of the telephoto end of the cine lens, fno is the aperture number of the cine lens, and TTL is the total optical length of the cine lens.

[0254] YC1 = 16.89 mm, YC2 = 8.16 mm; YC1 / YC2 = 2.07.

[0255] Among them, YC1 is the moving distance of the first moving lens group C1, and YC2 is the moving distance of the second moving lens group C2.

[0256] YB1 = 31.85 mm, YB2 = 6 mm, YB1 / YB2 = 5.31.

[0257] Among them, YB1 is the moving distance of the first focusing lens group B1, and YB2 is the moving distance of the second focusing lens group B2.

[0258] fB1 = -190.05 mm, fB2 = -7784.13 mm, fB1 / fB2 = 0.024.

[0259] Among them, fB1 is the focal length of the first focusing lens group B1.

[0260] fC1 = 78.96 mm, fC2 = 273.58 mm, fC1 / fC2 = 0.289.

[0261] Among them, fC1 is the focal length of the first moving lens group C1, and fC2 is the focal length of the second moving lens group C2.

[0262] LA3 = 130.14 mm, LA3 / TTL = 0.289.

[0263] Among them, LA3 is the total optical length of the third fixed lens group A3.

[0264] Embodiment 7

[0265] As Figures 26 - 30 shown, a cine lens, from the object side to the image side, successively includes: a first fixed lens group A1 with positive optical power, a first focusing lens group B1 with positive optical power, a second fixed lens group A2 with positive optical power, a second focusing lens group B2 with positive optical power, a first moving lens group C1 with positive optical power, a third fixed lens group A3 with positive optical power, a second moving lens group C2 with positive optical power, a diaphragm STO, and a fourth fixed lens group A4 with positive optical power.

[0266] The first fixed lens group A1 is a first fixed lens a1 with positive optical power.

[0267] The first focusing lens group B1 includes, in order from the object side to the image side: a first focusing lens b1 with positive optical power, a second focusing lens b2 with negative optical power, and a third focusing lens b3 with negative optical power; the first focusing lens b1 and the second focusing lens b2 are cemented together.

[0268] The second fixed lens group A2 includes, in order from the object side to the image side: a second fixed lens a2 with positive optical power, a third fixed lens a3 with positive optical power, and a fourth fixed lens a4 with negative optical power; the third fixed lens a3 and the fourth fixed lens a4 are cemented together.

[0269] The second focusing lens group B2 includes, in order from the object side to the image side: a fourth focusing lens b4 with negative optical power, and a fifth focusing lens b5 with positive optical power; the fourth focusing lens b4 and the fifth focusing lens b5 are cemented together.

[0270] The first moving lens group C1 includes, in order from the object side to the image side: a first moving lens c1 with negative optical power, a second moving lens c2 with negative optical power, and a third moving lens c3 with positive optical power; the second moving lens c2 and the third moving lens c3 are cemented together.

[0271] The third fixed lens group A3 includes, in order from the object side to the image side: a fifth fixed lens a5 with negative optical power, and a sixth fixed lens a6 with positive optical power; the fifth fixed lens a5 and the sixth fixed lens a6 are cemented together.

[0272] The second moving lens group C2 includes, in order from the object side to the image side: a fourth moving lens c4 with positive optical power, and a fifth moving lens c5 with negative optical power; the fourth moving lens c4 and the fifth moving lens c5 are cemented together.

[0273] The fourth fixed lens group A4 includes, in order from the object side to the image side:

[0274] a seventh fixed lens a7 with negative optical power, an eighth fixed lens a8 with positive optical power, a ninth fixed lens a9 with positive optical power, a tenth fixed lens a10 with negative optical power, an eleventh fixed lens a11 with positive optical power, a twelfth fixed lens a12 with negative optical power, a thirteenth fixed lens a13 with negative optical power, a fourteenth fixed lens a14 with positive optical power, and a fifteenth fixed lens a15 with positive optical power; the seventh fixed lens a7 and the eighth fixed lens a8 are cemented together, the tenth fixed lens a10 and the eleventh fixed lens a11 are cemented together, and the twelfth fixed lens a12 and the thirteenth fixed lens a13 are cemented together.

[0275] The basic lens data of the movie lens of this embodiment are shown in Table 16, and the variable parameters in Table 16 are shown in Tables 17 and 18.

[0276] In the surface number column, the surface numbers are shown when the surface on the object side is set as the first surface and the numbers are incremented one by one toward the image side; in the surface type column, the surface type of a certain lens is shown; in the radius of curvature column, the radius of curvature of a certain lens is shown. When the radius of curvature is positive, it indicates that the surface is curved toward the object side, and when the radius of curvature is negative, it indicates that the surface is curved toward the image side; in the center thickness column, the axial distance between each surface and the adjacent surface on its image side is shown; in the refractive index column, the refractive index of a certain lens is shown; in the Abbe number column, the Abbe number of a certain lens is shown.

[0277] In Table 17, each column represents the specific values of each variable parameter in different states when the movie lens moves in the first moving lens group C1 and the second moving lens group C2; in Table 18, each column represents the specific values of each variable parameter in different states when the movie lens moves in the first focusing lens group B1 and the second focusing lens group B2, as well as the focal length of the movie lens.

[0278]

Table 16

[0279]

[0280]

[0281]

Table 17

[0282]

[0283]

[0284]

Table 18

[0285] POS1 POS5 POS6 POS7 D1 INF 7511 3511 1311 D2 65.84 55.22 45.2 21.64 D3 1 11.63 21.65 45.2 D4 1 1.83 2.07 1.08 D5 4.95 4.12 3.88 4.87 D6 69.55 69.55 69.55 69.55 D7 16.26 16.26 16.26 16.26 D8 9.06 9.06 9.06 9.06 D9 1.25 1.25 1.25 1.25

[0286] In this embodiment, fw = 155 mm, ft = 200 mm, fno = 2.57, TTL = 484.62 mm.

[0287] Among them, fw is the focal length of the wide-angle end of the movie lens, ft is the focal length of the telephoto end of the movie lens, fno is the aperture number of the movie lens, and TTL is the total optical length of the movie lens.

[0288] YC1 = 15.26 mm, YC2 = 8.06 mm; YC1 / YC2 = 1.89.

[0289] Among them, YC1 is the moving distance of the first moving lens group C1, and YC2 is the moving distance of the second moving lens group C2.

[0290] YB1 = 44.2 mm, YB2 = 6 mm, YB1 / YB2 = 5.31.

[0291] Among them, YB1 is the moving distance of the first focusing lens group B1, and YB2 is the moving distance of the second focusing lens group B2.

[0292] fB1 = 79.24 mm, fB2 = 17.31 mm, fB1 / fB2 = 4.58.

[0293] Among them, fB1 is the focal length of the first focusing lens group B1.

[0294] fC1 = 34.05 mm, fC2 = 11.38 mm, fC1 / fC2 = 2.99.

[0295] Among them, fC1 is the focal length of the first moving lens group C1, and fC2 is the focal length of the second moving lens group C2.

[0296] LA4 = 125.5 mm, LA4 / TTL = 0.26.

[0297] Among them, LA4 is the total optical length of the fourth fixed lens group A4.

[0298] Embodiment 8

[0299] An imaging device, as Figures 1 - 30 shown, includes: a cine lens described in any one of the above embodiments, and an imaging element configured to receive an image formed by the cine lens.

[0300] It should be noted that the above embodiments can be freely combined as needed. The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A movie lens, characterized in that, The movie lens, from the object side to the image side, successively consists of: a first fixed lens group with a positive optical power, a first focusing lens group with a negative optical power, a second fixed lens group with a positive optical power, a first moving lens group with a negative optical power, a second focusing lens group with a negative optical power, a second moving lens group with a positive optical power, a diaphragm, and a third fixed lens group with a positive optical power. The first moving lens group and the second moving lens group form a moving lens group, and the first focusing lens group and the second focusing lens group form a focusing lens group. The moving lens group and the focusing lens group respectively move along the principal optical axis direction of the movie lens. The moving lens group moves to adjust the focal length of the movie lens, and the focusing lens group moves to adjust the object distance of the movie lens; The first fixed lens group consists of a first fixed lens with a positive optical power; The first focusing lens group, from the object side to the image side, successively consists of: a first focusing lens with a positive optical power, a second focusing lens with a negative optical power, and a third focusing lens with a negative optical power; The second fixed lens group, from the object side to the image side, successively consists of: a second fixed lens with a positive optical power, a third fixed lens with a positive optical power, a fourth fixed lens with a negative optical power, a fifth fixed lens with a negative optical power, and a sixth fixed lens with a positive optical power; The first moving lens group, from the object side to the image side, successively consists of: a first moving lens with a negative optical power, a second moving lens with a negative optical power, and a third moving lens with a positive optical power; The second focusing lens group, from the object side to the image side, successively consists of: a fourth focusing lens with a negative optical power and a fifth focusing lens with a positive optical power; The second moving lens group, from the object side to the image side, successively consists of: a fourth moving lens with a positive optical power and a fifth moving lens with a negative optical power; The third fixed lens group, from the object side to the image side, successively consists of: a seventh fixed lens with a negative optical power, an eighth fixed lens with a positive optical power, a ninth fixed lens with a positive optical power, a tenth fixed lens with a negative optical power, an eleventh fixed lens with a positive optical power, a twelfth fixed lens with a negative optical power, a thirteenth fixed lens with a negative optical power, a fourteenth fixed lens with a positive optical power, and a fifteenth fixed lens with a positive optical power; The movie lens satisfies the following conditional formula: YB1 / YB2 = 5.31; Wherein, YB1 is the moving distance of the first focusing lens group, and YB2 is the moving distance of the second focusing lens group.

2. A movie lens according to claim 1, characterized in that: The first focusing lens and the second focusing lens are cemented together.

3. A movie shot according to claim 1, characterized in that: The third fixed lens and the fourth fixed lens are cemented together, and the fifth fixed lens and the sixth fixed lens are cemented together.

4. A movie shot according to claim 1, characterized in that: The second moving lens and the third moving lens are cemented together.

5. A movie shot according to claim 1, characterized in that: The fourth focusing lens and the fifth focusing lens are cemented together.

6. A movie shot according to claim 1, characterized in that: The fourth moving lens and the fifth moving lens are cemented together.

7. A movie shot according to claim 1, characterized in that: The seventh fixed lens and the eighth fixed lens are cemented together, and the tenth fixed lens and the eleventh fixed lens are cemented together.

8. An imaging device, comprising: The movie lens according to any one of claims 1 to 7; And an imaging element configured to receive an image formed by the movie lens.

Images