Microobjective and microscopic imaging device

Abstract

The invention discloses a microscope objective and a microscopic imaging device, and relates to the technical field of optical imaging.The microscope objective is provided with a diaphragm side and an object side which are correspondingly arranged in the optical axis direction; the microscope objective comprises a diaphragm, a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with positive focal power, a fifth lens with positive focal power, a sixth lens with positive focal power and a seventh lens with negative focal power which are sequentially arranged from the diaphragm side to the object side. The invention discloses a microscope objective lens, which comprises a first lens with negative focal power, an eighth lens with negative focal power, a ninth lens with positive focal power, a tenth lens with positive focal power, an eleventh lens with negative focal power and an object plane, so that the working distance of the microscope objective lens is greater than 15mm, the total length of the lens is controlled to be less than or equal to 70mm, and all the lenses are spherical lenses. By means of the arrangement, the microscope objective is high in resolution, long in working distance, compact in overall structure and convenient to machine.

Description

Technical Field

[0001] This invention relates to the field of optical imaging technology, and in particular to a microscope objective and a microscope imaging device. Background Technology

[0002] Microscope objectives have significant applications in fields such as biology, medicine, materials science, and industrial inspection. Higher optical resolution objectives, in particular, allow for the observation of more sample details. However, existing high-resolution microscope objectives often have short back-working distances, posing a risk of interference with the object being measured during practical use, and their overall structure is not compact enough. Summary of the Invention

[0003] The main objective of this invention is to provide a microscope objective and a microscope imaging device, which aims to provide a microscope objective with high resolution, long working distance, relatively compact overall structure and easy manufacturing.

[0004] To achieve the above objectives, the present invention proposes a microscope objective having an aperture side and an object side correspondingly arranged along the optical axis. The microscope objective includes, in sequence from the aperture side to the object side, an aperture, a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, an eighth lens with negative optical power, a ninth lens with positive optical power, a tenth lens with positive optical power, an eleventh lens with negative optical power, and an object plane, so that the working distance of the microscope objective is greater than 15 mm and the total length of the lens is controlled to be less than or equal to 70 mm. Among them, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, and the eleventh lens are all set as spherical lenses.

[0005] In one embodiment, the optical power of the first lens is φ1, -0.04≤φ1≤-0.01; The optical power of the second lens is φ2, -0.03≤φ2≤-0.02; The optical power of the third lens is φ3, where 0.01≤φ3≤0.03; The optical power of the fourth lens is φ4, where 0.015≤φ4≤0.03; The optical power of the fifth lens is φ5, 0.01≤φ5≤0.03; The optical power of the sixth lens is φ6, where 0.03≤φ6≤0.05; The optical power of the seventh lens is φ7, -0.06≤φ7≤-0.04; The optical power of the eighth lens is φ8, -0.10≤φ8≤-0.07; The optical power of the ninth lens is φ9, 0.03≤φ9≤0.055; The optical power of the tenth lens is φ10, 0.07≤φ10≤0.09; The optical power of the eleventh lens is φ11, -0.06≤φ11≤-0.04.

[0006] In one embodiment, the refractive index of the first lens is n1, where 1.65 ≤ n1 ≤ 1.75; The refractive index of the second lens is n2, where 1.65 ≤ n2 ≤ 1.75; The refractive index of the third lens is n3, where 1.55 ≤ n3 ≤ 1.65; The refractive index of the fourth lens is n4, where 1.40 ≤ n4 ≤ 1.50; The refractive index of the fifth lens is n5, where 1.79 ≤ n5 ≤ 1.82; The refractive index of the sixth lens is n6, where 1.55 ≤ n6 ≤ 1.65; The refractive index of the seventh lens is n7, where 1.60 ≤ n7 ≤ 1.70; The refractive index of the eighth lens is n8, where 1.60 ≤ n8 ≤ 1.70; The refractive index of the ninth lens is n9, where 1.42 ≤ n9 ≤ 1.55; The refractive index of the tenth lens is n10, where 1.79 ≤ n10 ≤ 1.82; The refractive index of the eleventh lens is n11, where 1.59 ≤ n11 ≤ 1.65.

[0007] In one embodiment, the dispersion coefficient of the first lens is v1, where 28 ≤ v1 ≤ 35; The dispersion coefficient of the second lens is v2, 28≤v2≤35; The dispersion coefficient of the third lens is v3, 65≤v3≤70; The dispersion coefficient of the fourth lens is v4, 85≤v4≤92; The dispersion coefficient of the fifth lens is v5, 17≤v5≤25; The dispersion coefficient of the sixth lens is v6, 65≤v6≤70; The dispersion coefficient of the seventh lens is v7, 35≤v7≤45; The dispersion coefficient of the eighth lens is v8, 35≤v8≤45; The dispersion coefficient of the ninth lens is v9, 90≤v9≤96; The dispersion coefficient of the tenth lens is v10, 40≤v10≤50; The dispersion coefficient of the eleventh lens is v11, where 40 ≤ v11 ≤ 50.

[0008] In one embodiment, the aperture side radius of the first lens is R11, the object side radius is R12, -35mm≤R11≤-20mm, and -75mm≤R12≤-60mm; The second lens has an aperture side radius of R21 and an object side radius of R22, where -150mm≤R21≤-120mm and 35mm≤R22≤50mm. The third lens has an aperture side radius of R31 and an object side radius of R32, where 35mm≤R31≤50mm and -90mm≤R32≤-75mm. The fourth lens has an aperture side radius of R41 and an object side radius of R42, where 45mm≤R41≤55mm and -65mm≤R42≤-45mm. The fifth lens has an aperture side radius of R51 and an object side radius of R52, where 25mm≤R51≤35mm and 150mm≤R52≤180mm. The sixth lens has an aperture side radius of R61 and an object side radius of R62, where 15mm≤R61≤25mm and 700mm≤R62≤800mm. The seventh lens has an aperture side radius of R71 and an object side radius of R72, where 700mm≤R71≤800mm and 10mm≤R72≤20mm. The aperture side radius of the eighth lens is R81, the object side radius is R82, -25mm≤R81≤-18mm, and 10mm≤R82≤20mm; The aperture side radius of the ninth lens is R91, the object side radius is R92, 10mm≤R91≤20mm, and -30mm≤R92≤-20mm; The tenth lens has an aperture side radius of R101 and an object side radius of R102, with 30mm≤R101≤45mm and -20mm≤R102≤-12mm. The eleventh lens has an aperture side radius of R111 and an object side radius of R112, where -20mm≤R111≤-12mm and 80mm≤R112≤120mm.

[0009] In one embodiment, the design wavelength of the microscope objective is λ, where 420nm ≤ λ ≤ 655nm.

[0010] In one embodiment, the telecentricity of the principal wavelength of the microscope objective is A, where -0.1°≤A≤0.1°.

[0011] In one embodiment, the object-side numerical aperture of the microscope objective is NA, where NA ≤ 0.24.

[0012] In one embodiment, the object-space distortion of the microscope objective is less than 0.3%; and / or, The diameter of the effective field of view on the object side of the microscope objective is less than or equal to 6 mm.

[0013] The present invention also proposes a microscopic imaging device, including the above-mentioned microscope objective, wherein the microscope objective has an aperture side and an object side arranged correspondingly along the optical axis. The microscope objective includes an aperture, a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, an eighth lens with negative optical power, a ninth lens with positive optical power, a tenth lens with positive optical power, an eleventh lens with negative optical power, and an object surface arranged sequentially from the aperture side to the object side, such that the working distance of the microscope objective is greater than 15 mm and the total length of the lens is controlled to be less than or equal to 70 mm. Among them, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, and the eleventh lens are all set as spherical lenses.

[0014] In the technical solution of this invention, by rationally designing the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, and the eleventh lens, a microscope objective with a working distance greater than 15mm and a total lens length controlled to be less than or equal to 70mm is obtained. This ensures that the microscope objective has a long back working distance during use and that the overall structure is relatively stable, while also guaranteeing high resolution. Furthermore, by using spherical lenses, the processing cost is reduced while ensuring lens performance, and the assembly sensitivity is low, thus improving the yield of finished products. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the microscope objective provided by the present invention; Figure 2 for Figure 1 MTF diagram of medium microscope objectives at 250 lp / mm; Figure 3 for Figure 1 MTF diagram of a medium microscope objective at 500 lp / mm. Figure 4 for Figure 1 A schematic diagram of the theoretical distortion curve of a medium microscope objective; Figure 5 for Figure 1 A schematic diagram of the axial chromatic aberration curve of a medium microscope objective; Figure 6 for Figure 1 A schematic diagram of the transverse chromatic aberration curve of a medium microscope objective.

[0017] Explanation of icon numbers: 100. Microscope objective; 1. First lens; 2. Second lens; 3. Third lens; 4. Fourth lens; 5. Fifth lens; 6. Sixth lens; 7. Seventh lens; 8. Eighth lens; 9. Ninth lens; 10. Tenth lens; 11. Eleventh lens; 12. Aperture; 13. Object plane.

[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0022] Microscope objectives have significant applications in fields such as biology, medicine, materials science, and industrial inspection. Higher optical resolution objectives, in particular, allow for the observation of more sample details. However, existing high-resolution microscope objectives often have short back-working distances, posing a risk of interference with the object being measured during practical use, and their overall structure is not compact enough.

[0023] The main objective of this invention is to provide a microscope objective and a microscope imaging device, which aims to provide a microscope objective with high resolution, long working distance, relatively compact overall structure and easy manufacturing.

[0024] Please see Figure 1 In one embodiment of the present invention, the microscope objective 100 has an aperture side and an object side correspondingly arranged along the optical axis. The microscope objective 100 includes an aperture 12, a first lens 1 with negative optical power, a second lens 2 with negative optical power, a third lens 3 with positive optical power, a fourth lens 4 with positive optical power, a fifth lens 5 with positive optical power, a sixth lens 6 with positive optical power, a seventh lens 7 with negative optical power, an eighth lens 8 with negative optical power, and an optical... The microscope objective 100 is equipped with a ninth lens 9 (positive power), a tenth lens 10 (positive power), an eleventh lens 11 (negative power), and an object plane 13, such that the working distance of the microscope objective 100 is greater than 15 mm and the total length of the lens is controlled to be less than or equal to 70 mm. Among them, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10, and the eleventh lens 11 are all set as spherical lenses.

[0025] In the technical solution of the present invention, by reasonably designing the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10, and the eleventh lens 11, a microscope objective 100 with a working distance greater than 15mm and a total lens length controlled to be less than or equal to 70mm is obtained. This ensures that the microscope objective 100 has a long back working distance during use and a relatively stable overall structure, while also guaranteeing high resolution. Furthermore, by using spherical lenses, the processing cost is reduced while ensuring lens performance, and the assembly sensitivity is low, thereby improving the yield of finished products.

[0026] Further, in one embodiment of the present invention, the optical power of the first lens is φ1, -0.04≤φ1≤-0.01; the optical power of the second lens 2 is φ2, -0.03≤φ2≤-0.02; the optical power of the third lens 3 is φ3, 0.01≤φ3≤0.03; the optical power of the fourth lens 4 is φ4, 0.015≤φ4≤0.03; the optical power of the fifth lens 5 is φ5, 0.01≤φ5≤0.03; and the optical power of the sixth lens 6 is... The optical power of the seventh lens 7 is φ6, 0.03≤φ6≤0.05; the optical power of the eighth lens 8 is φ8, -0.10≤φ8≤-0.07; the optical power of the ninth lens 9 is φ9, 0.03≤φ9≤0.055; the optical power of the tenth lens 10 is φ10, 0.07≤φ10≤0.09; the optical power of the eleventh lens 11 is φ11, -0.06≤φ11≤-0.04.

[0027] It should be noted that the present invention does not limit the specific values ​​of the optical power of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10, and the eleventh lens 11, as long as they are within the above range, which will not be elaborated further here.

[0028] Furthermore, in a further embodiment of the present invention, the refractive index of the first lens 1 is n1, 1.65≤n1≤1.75; the refractive index of the second lens 2 is n2, 1.65≤n2≤1.75; the refractive index of the third lens 3 is n3, 1.55≤n3≤1.65; the refractive index of the fourth lens 4 is n4, 1.40≤n4≤1.50; the refractive index of the fifth lens 5 is n5, 1.79≤n5≤1.82; and the refractive index of the sixth lens 6 is n1, 1.65≤n1≤1.75. The refractive index of the seventh lens 7 is n6, 1.55≤n6≤1.65; the refractive index of the eighth lens 8 is n8, 1.60≤n8≤1.70; the refractive index of the ninth lens 9 is n9, 1.42≤n9≤1.55; the refractive index of the tenth lens 10 is n10, 1.79≤n10≤1.82; and the refractive index of the eleventh lens 11 is n11, 1.59≤n11≤1.65.

[0029] It is understood that the present invention does not limit the specific values ​​of the refractive indices of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10, and the eleventh lens 11. It is only necessary to ensure that the refractive indices of each lens are within the corresponding range. The specific values ​​can be selected according to the requirements during actual settings.

[0030] It should also be noted that, in another embodiment of the present invention, the dispersion coefficient of the first lens is v1, 28≤v1≤35; the dispersion coefficient of the second lens 2 is v2, 28≤v2≤35; the dispersion coefficient of the third lens 3 is v3, 65≤v3≤70; the dispersion coefficient of the fourth lens 4 is v4, 85≤v4≤92; the dispersion coefficient of the fifth lens 5 is v5, 17≤v5≤25; the dispersion coefficient of the sixth lens 6 is v6, 65≤v6≤70; the dispersion coefficient of the seventh lens 7 is v7, 35≤v7≤45; the dispersion coefficient of the eighth lens 8 is v8, 35≤v8≤45; the dispersion coefficient of the ninth lens 9 is v9, 90≤v9≤96; the dispersion coefficient of the tenth lens 10 is v10, 40≤v10≤50; and the dispersion coefficient of the eleventh lens 11 is v11, 40≤v11≤50.

[0031] The present invention does not limit the specific values ​​of the dispersion coefficients of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10, and the eleventh lens 11. It is only necessary to ensure that the dispersion coefficients of each lens are within the corresponding range. The specific values ​​can be selected according to the requirements during actual settings.

[0032] Furthermore, in another embodiment of the present invention, the first lens 1 has an aperture side radius of R11 and an object side radius of R12, where -35mm ≤ R11 ≤ -20mm and -75mm ≤ R12 ≤ -60mm; the second lens 2 has an aperture side radius of R21 and an object side radius of R22, where -150mm ≤ R21 ≤ -120mm and 35mm ≤ R22 ≤ 50mm; and the third lens 3 has an aperture side radius of R31 and an object side radius of R32, where 35mm... The fourth lens 4 has an aperture side radius of R41 and an object side radius of R42, with 45mm ≤ R41 ≤ 55mm and -65mm ≤ R42 ≤ -45mm; the fifth lens 5 has an aperture side radius of R51 and an object side radius of R52, with 25mm ≤ R51 ≤ 35mm and 150mm ≤ R52 ≤ 180mm; the sixth lens 6 has an aperture side radius of R61 and an object side radius of R... 62, 15mm≤R61≤25mm, 700mm≤R62≤800mm; the aperture side radius of the seventh lens 7 is R71, the object side radius is R72, 700mm≤R71≤800mm, 10mm≤R72≤20mm; the aperture side radius of the eighth lens 8 is R81, the object side radius is R82, -25mm≤R81≤-18mm, 10mm≤R82≤20mm; the aperture side radius of the ninth lens 9 is R91, The object side radius is R92, 10mm≤R91≤20mm, -30mm≤R92≤-20mm; the aperture side radius of the tenth lens 10 is R101, the object side radius is R102, 30mm≤R101≤45mm, -20mm≤R102≤-12mm; the aperture side radius of the eleventh lens 11 is R111, the object side radius is R112, -20mm≤R111≤-12mm, 80mm≤R112≤120mm.

[0033] Similarly, the present invention does not limit the specific values ​​of the aperture side radius and object side radius of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, the ninth lens 9, the tenth lens 10, and the eleventh lens 11. It is only necessary to ensure that the aperture side radius and object side radius of each lens are within the corresponding range. The specific values ​​can be selected according to the requirements during actual setting.

[0034] It should be further noted that, in order to further improve the accuracy of the microscope objective 100, in one embodiment of the present invention, the design wavelength of the microscope objective 100 is λ, 420nm≤λ≤655nm.

[0035] Furthermore, in another embodiment of the present invention, the telecentricity of the principal wavelength of the microscope objective 100 in the object side is A, -0.1°≤A≤0.1°.

[0036] In another embodiment of the present invention, the object-side numerical aperture of the microscope objective 100 is NA, where NA ≤ 0.24. It is understood that this setting ensures the high resolution of the microscope objective 100, so that the microscope objective 100 maintains high resolution while ensuring its conjugate distance.

[0037] In another embodiment of the present invention, the diameter of the effective field of view on the object side of the microscope objective 100 is less than or equal to 6 mm. By reasonably controlling the size of the effective field of view on the object side, the requirements of the microscope objective 100 for high resolution, high precision, and imaging of small-area details can be easily met. Furthermore, in other embodiments of the present invention, the object-side distortion of the microscope objective 100 is less than 0.3%, thereby ensuring that the lens has high imaging quality.

[0038] In a specific embodiment of the present invention, the radii, center distances, refractive indices, and Abbe numbers of each side of the plurality of lenses in the microscope objective 100 are shown in Table 1 below, wherein the units for center distance and radius are millimeters: Table 1

[0039] It should be noted that you should refer to [link / reference]. Figure 2 and Figure 3 In this embodiment, the MTF of the microscope objective 100 has a contrast ratio of >0.6 at 250 lp / mm and a contrast ratio of >0.3 at 500 lp / mm.

[0040] Please see Figure 4 , Figure 4 This is a schematic diagram of the theoretical distortion curve of the microscope objective 100, as shown below. Figure 4As shown, the distortion of the microscope objective 100 is less than 0.3%.

[0041] Please see Figure 5 , Figure 5 This is a schematic diagram of the axial chromatic aberration curve of the microscope objective 100, as shown below. Figure 5 As shown, the axial chromatic aberration of the microscope objective 100 is controlled within the range of (-1μm, +2.5μm).

[0042] Please see Figure 6 , Figure 4 This is a schematic diagram of the transverse chromatic aberration curve of the microscope objective 100, as shown below. Figure 6 As shown, the chromatic aberration of the microscope objective 100 is controlled within the range of (-0.2μm, +0.3μm).

[0043] In summary, the microscope objective 100 of this embodiment has extremely high imaging quality.

[0044] The present invention also proposes a microscopic imaging device, which includes a microscope objective 100. The specific structure of the microscope objective 100 is as described in the above embodiments. Since the present microscopic imaging device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0045] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A microscope objective, characterized in that, The microscope objective has an aperture side and an object side arranged correspondingly along the optical axis. The microscope objective includes an aperture, a first lens with negative optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, an eighth lens with negative optical power, a ninth lens with positive optical power, a tenth lens with positive optical power, an eleventh lens with negative optical power, and an object plane arranged sequentially from the aperture side to the object side, so that the working distance of the microscope objective is greater than 15mm and the total length of the lens is controlled to be less than or equal to 70mm. Among them, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, and the eleventh lens are all set as spherical lenses.

2. The microscope objective as described in claim 1, characterized in that, The optical power of the first lens is φ1, -0.04≤φ1≤-0.01; The optical power of the second lens is φ2, -0.03≤φ2≤-0.02; The optical power of the third lens is φ3, where 0.01≤φ3≤0.03; The optical power of the fourth lens is φ4, where 0.015≤φ4≤0.03; The optical power of the fifth lens is φ5, 0.01≤φ5≤0.03; The optical power of the sixth lens is φ6, where 0.03≤φ6≤0.05; The optical power of the seventh lens is φ7, -0.06≤φ7≤-0.04; The optical power of the eighth lens is φ8, -0.10≤φ8≤-0.07; The optical power of the ninth lens is φ9, 0.03≤φ9≤0.055; The optical power of the tenth lens is φ10, 0.07≤φ10≤0.09; The optical power of the eleventh lens is φ11, -0.06≤φ11≤-0.

04.

3. The microscope objective as described in claim 1, characterized in that, The refractive index of the first lens is n1, where 1.65 ≤ n1 ≤ 1.75; The refractive index of the second lens is n2, where 1.65 ≤ n2 ≤ 1.75; The refractive index of the third lens is n3, where 1.55 ≤ n3 ≤ 1.65; The refractive index of the fourth lens is n4, where 1.40 ≤ n4 ≤ 1.50; The refractive index of the fifth lens is n5, where 1.79 ≤ n5 ≤ 1.82; The refractive index of the sixth lens is n6, where 1.55 ≤ n6 ≤ 1.65; The refractive index of the seventh lens is n7, where 1.60 ≤ n7 ≤ 1.70; The refractive index of the eighth lens is n8, where 1.60 ≤ n8 ≤ 1.70; The refractive index of the ninth lens is n9, where 1.42 ≤ n9 ≤ 1.55; The refractive index of the tenth lens is n10, where 1.79 ≤ n10 ≤ 1.82; The refractive index of the eleventh lens is n11, where 1.59 ≤ n11 ≤ 1.

65.

4. The microscope objective as described in claim 1, characterized in that, The dispersion coefficient of the first lens is v1, 28≤v1≤35; The dispersion coefficient of the second lens is v2, 28≤v2≤35; The dispersion coefficient of the third lens is v3, 65≤v3≤70; The dispersion coefficient of the fourth lens is v4, 85≤v4≤92; The dispersion coefficient of the fifth lens is v5, 17≤v5≤25; The dispersion coefficient of the sixth lens is v6, 65≤v6≤70; The dispersion coefficient of the seventh lens is v7, 35≤v7≤45; The dispersion coefficient of the eighth lens is v8, 35≤v8≤45; The dispersion coefficient of the ninth lens is v9, 90≤v9≤96; The dispersion coefficient of the tenth lens is v10, 40≤v10≤50; The dispersion coefficient of the eleventh lens is v11, where 40 ≤ v11 ≤ 50.

5. The microscope objective as described in claim 1, characterized in that, The first lens has an aperture side radius of R11 and an object side radius of R12, where -35mm≤R11≤-20mm and -75mm≤R12≤-60mm. The second lens has an aperture side radius of R21 and an object side radius of R22, where -150mm≤R21≤-120mm and 35mm≤R22≤50mm. The third lens has an aperture side radius of R31 and an object side radius of R32, where 35mm≤R31≤50mm and -90mm≤R32≤-75mm. The fourth lens has an aperture side radius of R41 and an object side radius of R42, where 45mm≤R41≤55mm and -65mm≤R42≤-45mm. The fifth lens has an aperture side radius of R51 and an object side radius of R52, where 25mm≤R51≤35mm and 150mm≤R52≤180mm. The sixth lens has an aperture side radius of R61 and an object side radius of R62, where 15mm≤R61≤25mm and 700mm≤R62≤800mm. The seventh lens has an aperture side radius of R71 and an object side radius of R72, where 700mm≤R71≤800mm and 10mm≤R72≤20mm. The aperture side radius of the eighth lens is R81, the object side radius is R82, -25mm≤R81≤-18mm, and 10mm≤R82≤20mm; The aperture side radius of the ninth lens is R91, the object side radius is R92, 10mm≤R91≤20mm, and -30mm≤R92≤-20mm; The tenth lens has an aperture side radius of R101 and an object side radius of R102, with 30mm≤R101≤45mm and -20mm≤R102≤-12mm. The eleventh lens has an aperture side radius of R111 and an object side radius of R112, where -20mm≤R111≤-12mm and 80mm≤R112≤120mm.

6. The microscope objective as described in claim 1, characterized in that, The design wavelength of the microscope objective is λ, 420nm≤λ≤655nm.

7. The microscope objective as described in claim 1, characterized in that, The telecentricity of the principal wavelength on the object side of the microscope objective is A, where -0.1°≤A≤0.1°.

8. The microscope objective as described in claim 1, characterized in that, The object-side numerical aperture of the microscope objective is NA, where NA ≤ 0.

24.

9. The microscope objective as described in claim 1, characterized in that, The object-space distortion of the microscope objective is less than 0.3%; and / or, The diameter of the effective field of view on the object side of the microscope objective is less than or equal to 6 mm.

10. A microscopic imaging device, characterized in that, Includes the microscope objectives as described in any one of claims 1 to 9.

Images