Ultra-large aperture telephoto objective lens and imaging device

Abstract

The present invention relates to the field of optics, and specifically to an ultra-large aperture telescopic objective lens and an imaging device. The ultra-large aperture telescopic objective lens comprises, from the object side to the image side, a first lens with positive focal power, a mobile lens group with positive focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with negative focal power, a seventh lens with positive focal power, an eighth lens with positive focal power, a ninth lens with negative focal power, the fourth lens and the fifth lens are glued together, and the eighth lens and the ninth lens are glued together; the mobile lens group comprises one or two lenses with positive focal power; the mobile lens group moves along the main optical axis direction of the ultra-large aperture telescopic objective lens; the ultra-large aperture telescopic objective lens satisfies the following conditional formula: Fno<0.9; wherein Fno is the aperture number of the ultra-large aperture telescopic objective lens. An objective lens with a relatively large aperture is realized, the miniaturization of the ultra-large aperture telescopic objective lens is realized, and the application range of the ultra-large aperture telescopic objective lens is increased.

Description

Technical Field

[0001] The invention relates to the field of optics, and in particular to an ultra-large aperture telephoto objective lens and an imaging device. Background Art

[0002] The objective lens is an optical system composed of several lenses used to observe the scene. The quality of the objective lens directly affects the quality of the image. It is the main component that determines the resolution and clarity of the observation. Therefore, for this type of optical system, the specifications and performance of the objective lens are particularly important.

[0003] How to adapt to various complex observation environments has long been the primary issue that objective lens system design and development efforts have been committed to solving. In order to achieve shooting in dark fields without natural light, such as at night and in closed environments, the objective lens application band needs to cover a wide spectral range from visible light to 850nm near-infrared, while special applications such as precision sights and underground detection require the objective lens to be compatible with infrared bands above 940nm. At the same time, the aperture of the objective lens must be large enough to ensure that the objective lens can still output high-resolution imaging effects in ultra-low illumination environments, thereby improving the monitoring capability and detection range of the optical system.

[0004] Depending on the distance of the object being photographed, observers often choose to use objective lenses with different focal lengths. Objective lenses for long-distance imaging are also called telephoto lenses. However, according to optical theory, the longer the focal length of the lens, the more difficult it is to achieve the above-mentioned requirements of wide spectrum and large aperture, and the size of the lens will also be larger under the same parameter indicators. Existing objective lenses are usually large in size and have small apertures, and can be applied to fewer scenes. Summary of the invention

[0005] The present invention will solve the existing technical problems and provide an ultra-large aperture telephoto objective lens and an imaging device, realizing an objective lens with a relatively large aperture and a relatively small volume of the objective lens, thereby realizing the miniaturization of the ultra-large aperture telephoto objective lens and increasing the application range of the ultra-large aperture telephoto objective lens.

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

[0007] An ultra-large aperture telephoto objective lens, the ultra-large aperture telephoto objective lens comprising, from the object plane side to the image plane side, the following components:

[0008] A first lens with positive power, a mobile lens group with positive power, a fourth lens with positive power, a fifth lens with negative power, a sixth lens with negative power, a seventh lens with positive power, an eighth lens with positive power, a ninth lens with negative power, the fourth lens and the fifth lens are cemented together, and the eighth lens and the ninth lens are cemented together;

[0009] The movable lens group includes one or two lenses with positive optical power;

[0010] The movable lens group moves along the main optical axis direction of the super-large aperture telephoto objective lens;

[0011] The ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0012] Fno<0.9;

[0013] Wherein, Fno is the aperture number of the super-large aperture telephoto objective lens.

[0014] In the technical solution, through the setting of the above structure and parameters, a larger aperture objective lens is realized, and the volume of the objective lens is smaller, so that the miniaturization of the ultra-large aperture telephoto objective lens is achieved, and the application range of the ultra-large aperture telephoto objective lens is increased.

[0015] Preferably, the ultra-large aperture telephoto objective lens is further provided with an aperture stop, and the aperture stop is arranged on the object plane side of the fifth lens.

[0016] In the technical solution, by limiting the position of the diaphragm, the aperture of the super-large aperture telephoto objective lens is further increased, thereby enhancing the night vision effect of the super-large aperture telephoto objective lens.

[0017] Preferably, the outer diameters of the first lens to the ninth lens gradually decrease from the image plane side to the object plane side.

[0018] In the present technical solution, by limiting the outer diameters of the first to ninth lenses, the possibility of the focal length of the lens being too large or too small is further reduced, thereby reducing the possibility of the lens being too thick, and reducing the image aberration and coma of the super-large aperture telescope objective lens.

[0019] Preferably, the ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0020] TTL / S>50;

[0021] Wherein, S is the moving distance of the movable lens group, and TTL is the total optical length of the super-large aperture telephoto objective lens.

[0022] In the technical solution, by limiting the above parameters, the moving distance of the moving lens group is reduced, and at the same time, the miniaturization of the ultra-large aperture telephoto objective lens can be achieved.

[0023] Preferably, the ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0024] -1.5<f45 / f<-0.5;

[0025] Among them, f45 is the combined focal length of the fourth lens and the fifth lens, and f is the focal length of the super-large aperture telephoto objective lens.

[0026] In the technical solution, by limiting the combined focal length of the fourth lens and the fifth lens, the aberration and coma of the first lens and the movable lens group are corrected, thereby improving the imaging quality of the intermediate magnification of the super-large aperture telephoto objective lens.

[0027] Preferably, the ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0028] -1.5<f8 / f9<-0.8;

[0029] Among them, f8 is the focal length of the eighth lens, and f9 is the focal length of the ninth lens.

[0030] In the technical solution, by limiting the focal length ratio of the eighth lens and the ninth lens, the possibility of the eighth lens and the ninth lens having too large focal lengths is reduced, and the possibility of the eighth lens and the ninth lens having too large thicknesses is reduced.

[0031] Preferably, the ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0032] φ9 / Y<2;

[0033] Wherein, φ9 is the outer diameter of the ninth lens, and Y is the image height of the super-large aperture telephoto objective lens.

[0034] In the technical solution, by limiting the outer diameter of the ninth lens and the image height of the super-large aperture telephoto objective lens, the aperture and target surface of the super-large aperture telephoto objective lens are increased, and large target surface imaging can be achieved under low illumination conditions, thereby increasing the scope of application of the super-large aperture telephoto objective lens.

[0035] One of the objectives of the present invention is to provide an imaging device, comprising: an ultra-large aperture telephoto objective; and an imaging element configured to receive an image formed by the ultra-large aperture telephoto objective.

[0036] Compared with the prior art, the ultra-large aperture telephoto objective lens and imaging device provided by the present invention have the following beneficial effects:

[0037] 1. Through the setting of the above structure and parameters, a larger aperture objective lens is realized, and the volume of the objective lens is small, the miniaturization of the ultra-large aperture telephoto objective lens is realized, and the application range of the ultra-large aperture telephoto objective lens is increased.

[0038] 2. By limiting the outer diameters of the first to ninth lenses, the possibility of the focal length of the lens being too large or too small is further reduced, thereby reducing the possibility of the lens being too thick, and reducing the image aberration and coma of the super-large aperture telephoto object.

[0039] 3. By limiting the combined focal length of the fourth lens and the fifth lens, the aberration and coma of the first lens and the movable lens group are corrected, thereby improving the imaging quality of the intermediate magnification of the ultra-large aperture telephoto objective lens.

[0040] 4. By limiting the outer diameter of the ninth lens and the image height of the super-large aperture telephoto objective lens, the aperture and target surface of the super-large aperture telephoto objective lens are increased, and large target surface imaging can be achieved under low illumination conditions, thereby increasing the scope of application of the super-large aperture telephoto objective lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The following will explain the preferred implementation scheme in a clear and easy-to-understand manner with reference to the accompanying drawings, and further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of an ultra-large aperture telephoto objective and imaging device.

[0042] Figure 1 It is a structural schematic diagram of a super-large aperture telephoto objective lens of the present invention;

[0043] Figure 2 It is an aberration diagram of a super-large aperture telephoto objective lens of the present invention;

[0044] Figure 3 It is a structural schematic diagram of another super-large aperture telephoto objective lens of the present invention;

[0045] Figure 4 is another aberration diagram of a super-large aperture telephoto objective lens of the present invention;

[0046] Figure 5 It is a structural schematic diagram of another super-large aperture telephoto objective lens of the present invention;

[0047] Figure 6 This is another aberration diagram of an ultra-large aperture telephoto objective lens of the present invention.

[0048] Description of the accompanying drawings: L1, first lens; L2, second lens; L3, third lens; L4, fourth lens; L5, fifth lens; L6, sixth lens; L7, seventh lens; L8, eighth lens; L9, ninth lens; STO, aperture; FI, filter; CG, protective glass. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0051] Example 1

[0052] like Figure 1 , Figure 3 and Figure 5 As shown, a super-large aperture telephoto objective lens, the super-large aperture telephoto objective lens comprises, from the object side to the image side, the following components:

[0053] A first lens L1 with positive focal power, a mobile lens group with positive focal power, a fourth lens L4 with positive focal power, a fifth lens L5 with negative focal power, a sixth lens L6 with negative focal power, a seventh lens L7 with positive focal power, an eighth lens L8 with positive focal power, a ninth lens L9 with negative focal power, the fourth lens L4 and the fifth lens L5 are cemented together, and the eighth lens L8 and the ninth lens L9 are cemented together.

[0054] The movable lens group includes one or two lenses with positive optical power;

[0055] The movable lens group moves along the main optical axis direction of the super-large aperture telephoto objective lens;

[0056] The ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0057] Fno<0.9;

[0058] Wherein, Fno is the aperture number of the super-large aperture telephoto objective lens.

[0059] In this embodiment, through the setting of the above structure and parameters, a larger aperture objective lens is realized, and the volume of the objective lens is smaller, so that the ultra-large aperture telephoto objective lens is miniaturized and the application range of the ultra-large aperture telephoto objective lens is increased.

[0060] A stop STO is also provided in the super-large aperture telephoto objective lens, and the stop STO is arranged on the object surface side of the fifth lens L5.

[0061] In this embodiment, by limiting the position of the aperture STO, the aperture of the super-large aperture telephoto objective lens is further increased, thereby enhancing the night vision effect of the super-large aperture telephoto objective lens.

[0062] The outer diameters of the first lens L1 to the ninth lens L9 gradually decrease from the image plane side to the object plane side.

[0063] In this embodiment, by limiting the outer diameters of the first lens L1 to the ninth lens L9, the possibility of the focal length of the lens being too large or too small is further reduced, thereby reducing the possibility of the lens being too thick, and reducing the aberration and coma of the super-large aperture telephoto object.

[0064] The ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0065] TTL / S>50;

[0066] Wherein, S is the moving distance of the movable lens group, and TTL is the total optical length of the super-large aperture telephoto objective lens.

[0067] By limiting the above parameters, the moving distance of the moving lens group is reduced, and at the same time, the miniaturization of the ultra-large aperture telephoto objective can be achieved.

[0068] The ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0069] -1.5<f45 / f<-0.5;

[0070] Wherein, f45 is the combined focal length of the fourth lens L4 and the fifth lens L5, and f is the focal length of the super large aperture telephoto objective lens.

[0071] In this embodiment, by limiting the combined focal length of the fourth lens L4 and the fifth lens L5, correction of aberrations and coma of the first lens L1 and the movable lens group is achieved, thereby improving the imaging quality of the intermediate magnification of the super-large aperture telephoto objective lens.

[0072] The ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0073] -1.5<f8 / f9<-0.8;

[0074] Wherein, f8 is the focal length of the eighth lens L8, and f9 is the focal length of the ninth lens L9.

[0075] By limiting the focal length ratio of the eighth lens L8 and the ninth lens L9, the possibility of the eighth lens L8 and the ninth lens L9 having too large focal lengths is reduced, and the possibility of the eighth lens L8 and the ninth lens L9 having too large thicknesses is reduced.

[0076] The ultra-large aperture telephoto objective lens satisfies the following conditional formula:

[0077] φ9 / Y<2;

[0078] Wherein, φ9 is the outer diameter of the ninth lens L9, and Y is the image height of the super-large aperture telephoto objective lens.

[0079] In this embodiment, by limiting the outer diameter of the ninth lens L9 and the image height of the super-large aperture telephoto objective lens, the aperture and target surface of the super-large aperture telephoto objective lens are increased, and large target surface imaging can be achieved under low illumination conditions, thereby increasing the scope of application of the super-large aperture telephoto objective lens.

[0080] Example 2

[0081] like Figure 1 and Figure 2 As shown, a super-large aperture telephoto objective lens, the super-large aperture telephoto objective lens comprises, from the object side to the image side, the following components:

[0082] The first lens L1 with positive optical power, the moving lens group with positive optical power, the fourth lens L4 with positive optical power, the fifth lens L5 with negative optical power, the sixth lens L6 with negative optical power, the seventh lens L7 with positive optical power, the eighth lens L8 with positive optical power, the ninth lens L9 with negative optical power, the filter FI and the protective glass CG, the fourth lens L4 and the fifth lens L5 are cemented together, and the eighth lens L8 and the ninth lens L9 are cemented together.

[0083] The moving lens group is a second lens group L2 with positive refractive power.

[0084] Table 1 shows basic lens data of the super-large aperture telephoto objective lens of this embodiment, and Table 2 shows variable parameters in Table 1.

[0085] The surface number column shows the surface number when the surface on the object side is set as the first surface and the numbers are increased one by one toward the image side; the surface type column shows the surface type of a certain lens; the curvature radius column shows the curvature radius of a certain lens, and 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; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to its image side; the refractive index column shows the refractive index of a certain lens; and the Abbe number column shows the Abbe number of a certain lens.

[0086] In Table 2, the WIDE column indicates the specific values ​​of various variable parameters when the super-large aperture telephoto objective is in the wide-angle end state, and the TELE column indicates the specific values ​​of various variable parameters when the super-large aperture telephoto objective is in the telephoto end state.

[0087]

Table 1

[0088]

[0089]

Table 2

[0090]

[0091]

[0092] In this embodiment, f=30.9 mm, fno=0.82, Y=7 mm, TTL=72 mm;

[0093] Among them, f is the focal length of the super-large aperture telephoto objective lens, fno is the aperture of the super-large aperture telephoto objective lens, Y is the image height of the super-large aperture telephoto objective lens, and TTL is the total optical length of the super-large aperture telephoto objective lens.

[0094] S = 1.22 mm, TTL / S = 59;

[0095] Wherein, S is the moving distance of the moving lens group.

[0096] f45=-24.6mm, f45 / f=-0.80;

[0097] f89=100.4mm,f89 / f=3.25;

[0098] Wherein, f45 is the combined focal length of the fourth lens and the fifth lens, and f89 is the combined focal length of the eighth lens L8 and the ninth lens L9.

[0099] f8=27.5mm, f9=-28.0mm, f8 / f9=-0.98;

[0100] Wherein, f8 is the focal length of the eighth lens L8, and f9 is the focal length of the ninth lens L9.

[0101] φ9=11.72,φ9 / Y=1.67;

[0102] Wherein, φ9 is the outer diameter of the ninth lens L9, and Y is the image height of the zoom lens.

[0103] Example 3

[0104] like Figure 3 and Figure 4 As shown, a super-large aperture telephoto objective lens, the super-large aperture telephoto objective lens comprises, from the object side to the image side, the following components:

[0105] The first lens L1 with positive optical power, the moving lens group with positive optical power, the fourth lens L4 with positive optical power, the fifth lens L5 with negative optical power, the sixth lens L6 with negative optical power, the seventh lens L7 with positive optical power, the eighth lens L8 with positive optical power, the ninth lens L9 with negative optical power, the filter FI and the protective glass CG, the fourth lens L4 and the fifth lens L5 are cemented together, and the eighth lens L8 and the ninth lens L9 are cemented together.

[0106] The moving lens group is a second lens group L2 with positive refractive power.

[0107] The basic lens data of the super-large aperture telephoto objective lens of this embodiment is shown in Table 3, and the variable parameters in Table 4 are shown in Table 4.

[0108] The surface number column shows the surface number when the surface on the object side is set as the first surface and the numbers are increased one by one toward the image side; the surface type column shows the surface type of a certain lens; the curvature radius column shows the curvature radius of a certain lens, and 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; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to its image side; the refractive index column shows the refractive index of a certain lens; and the Abbe number column shows the Abbe number of a certain lens.

[0109] In Table 4, the WIDE column indicates the specific values ​​of various variable parameters when the super-large aperture telephoto objective is in the wide-angle end state, and the TELE column indicates the specific values ​​of various variable parameters when the super-large aperture telephoto objective is in the telephoto end state.

[0110]

Table 3

[0111]

[0112]

[0113]

Table 4

[0114] WIDE TELE D1 23.98 25.00 D2 1.12 0.10

[0115] In this embodiment, f=36.5 mm, fno=0.8, Y=7 mm, TTL=72.65 mm;

[0116] Among them, f is the focal length of the super-large aperture telephoto objective lens, fno is the aperture of the super-large aperture telephoto objective lens, Y is the image height of the super-large aperture telephoto objective lens, and TTL is the total optical length of the super-large aperture telephoto objective lens.

[0117] S = 1.02 mm, TTL / S = 71.23;

[0118] Wherein, S is the moving distance of the moving lens group.

[0119] f45=-44.0mm, f45 / f=-1.20;

[0120] f89=-550.3mm, f89 / f=-15.1;

[0121] Wherein, f45 is the combined focal length of the fourth lens and the fifth lens, and f89 is the combined focal length of the eighth lens L8 and the ninth lens L9.

[0122] f8=35.5mm, f9=-27.5mm, f8 / f9=-1.29;

[0123] Wherein, f8 is the focal length of the eighth lens L8, and f9 is the focal length of the ninth lens L9.

[0124] φ9=13.53,φ9 / Y=1.93;

[0125] Wherein, φ9 is the outer diameter of the ninth lens L9, and Y is the image height of the zoom lens.

[0126] Example 4

[0127] like Figure 5 and Figure 6 As shown, a super-large aperture telephoto objective lens, the super-large aperture telephoto objective lens comprises, from the object side to the image side, the following components:

[0128] The first lens L1 with positive optical power, the moving lens group with positive optical power, the fourth lens L4 with positive optical power, the fifth lens L5 with negative optical power, the sixth lens L6 with negative optical power, the seventh lens L7 with positive optical power, the eighth lens L8 with positive optical power, the ninth lens L9 with negative optical power, the filter FI and the protective glass CG, the fourth lens L4 and the fifth lens L5 are cemented together, and the eighth lens L8 and the ninth lens L9 are cemented together.

[0129] The moving lens group includes a second lens group L2 of positive refractive power and a third lens group L3 of positive refractive power.

[0130] The basic lens data of the super-large aperture telephoto objective lens of this embodiment is shown in Table 5, and the variable parameters in Table 6 are shown in Table 6.

[0131] The surface number column shows the surface number when the surface on the object side is set as the first surface and the numbers are increased one by one toward the image side; the surface type column shows the surface type of a certain lens; the curvature radius column shows the curvature radius of a certain lens, and 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; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to its image side; the refractive index column shows the refractive index of a certain lens; and the Abbe number column shows the Abbe number of a certain lens.

[0132] In Table 6, the WIDE column indicates the specific values ​​of the various variable parameters when the super-large aperture telephoto objective is in the wide-angle end state, and the TELE column indicates the specific values ​​of the various variable parameters when the super-large aperture telephoto objective is in the telephoto end state.

[0133]

Table 5

[0134]

[0135]

[0136]

Table 6

[0137] WIDE TELE D1 8.26 8.54 D2 0.78 0.50

[0138] In this embodiment, f=40 mm, fno=0.8, Y=7 mm, TTL=72 mm;

[0139] Among them, f is the focal length of the super-large aperture telephoto objective lens, fno is the aperture of the super-large aperture telephoto objective lens, Y is the image height of the super-large aperture telephoto objective lens, and TTL is the total optical length of the super-large aperture telephoto objective lens.

[0140] S = 0.28 mm, TTL / S = 257;

[0141] Wherein, S is the moving distance of the moving lens group.

[0142] f45=-30.7mm, f45 / f=-0.77;

[0143] f89=154.6mm, f89 / f=3.87;

[0144] Wherein, f45 is the combined focal length of the fourth lens and the fifth lens, and f89 is the combined focal length of the eighth lens L8 and the ninth lens L9.

[0145] f8=49.8mm, f9=-56.2mm, f8 / f9=-0.89;

[0146] Wherein, f8 is the focal length of the eighth lens L8, and f9 is the focal length of the ninth lens L9.

[0147] φ9=11.43,φ9 / Y=1.63;

[0148] Wherein, φ9 is the outer diameter of the ninth lens L9, and Y is the image height of the zoom lens.

[0149] Example 5

[0150] An imaging device, such as Figure 1-Figure 6 As shown, it includes: an ultra-large aperture telephoto objective lens as described in any of the above embodiments, and an imaging element, which is configured to receive an image formed by the ultra-large aperture telephoto objective lens.

[0151] It should be noted that the above embodiments can be freely combined as needed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An ultra-large aperture telephoto objective lens, characterized in that: The super-large aperture telephoto objective lens is composed of a first lens with positive focal power, a moving lens group with positive focal power, a fourth lens with positive focal power, a fifth lens with negative focal power, a sixth lens with negative focal power, a seventh lens with positive focal power, an eighth lens with positive focal power, and a ninth lens with negative focal power from the object plane side to the image plane side, the fourth lens and the fifth lens are glued together, and the eighth lens and the ninth lens are glued together; From the object side to the image side, the outer diameters of the first lens to the ninth lens gradually decrease; The movable lens group includes one or two lenses with positive optical power; The movable lens group moves along the main optical axis direction of the super-large aperture telephoto objective lens; The ultra-large aperture telephoto objective lens satisfies the following conditional formula: Fno<0.9; TTL / S>50; Wherein, Fno is the aperture number of the super-large aperture telephoto objective lens, S is the moving distance of the moving lens group, and TTL is the total optical length of the super-large aperture telephoto objective lens.

2. The ultra-large aperture telephoto objective lens according to claim 1, characterized in that: The ultra-large aperture telephoto objective lens is further provided with an aperture stop, and the aperture stop is arranged on the object surface side of the fifth lens.

3. The ultra-large aperture telephoto objective lens according to claim 1, characterized in that: The outer diameters of the first to ninth lenses gradually decrease from the image plane side to the object plane side.

4. The ultra-large aperture telephoto objective lens according to claim 1, characterized in that: The ultra-large aperture telephoto objective lens satisfies the following conditional formula: -1.5<f45 / f<-0.5; Among them, f45 is the combined focal length of the fourth lens and the fifth lens, and f is the focal length of the super-large aperture telephoto objective lens.

5. The ultra-large aperture telephoto objective lens according to claim 1, characterized in that: The ultra-large aperture telephoto objective lens satisfies the following conditional formula: -1.5<f8 / f9<-0.8; Among them, f8 is the focal length of the eighth lens, and f9 is the focal length of the ninth lens.

6. The ultra-large aperture telephoto objective lens according to claim 1, characterized in that: The ultra-large aperture telephoto objective lens satisfies the following conditional formula: φ9 / Y<2; Wherein, φ9 is the outer diameter of the ninth lens, and Y is the image height of the super-large aperture telephoto objective lens.

7. An imaging device comprising: The ultra-large aperture telephoto objective lens as claimed in any one of claims 1 to 6; and an imaging element configured to receive an image formed by the super-large aperture telephoto objective lens.

Images