CN112578545A - 40-time long working distance optical microscope objective - Google Patents
40-time long working distance optical microscope objective Download PDFInfo
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- CN112578545A CN112578545A CN202011252108.1A CN202011252108A CN112578545A CN 112578545 A CN112578545 A CN 112578545A CN 202011252108 A CN202011252108 A CN 202011252108A CN 112578545 A CN112578545 A CN 112578545A
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- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/02—Objectives
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Abstract
The invention discloses a 40-time working distance optical microscope objective lens which comprises a lens, wherein the lens comprises a first lens group, a second lens group, a third lens group, a fourth lens group and a fifth lens group which are sequentially arranged from an object space to an image space, the first lens group comprises a first lens and a second lens which are sequentially arranged from the object space to the image space, the second lens group comprises a third lens and a fourth lens which are sequentially arranged from the object space to the image space, and the third lens group comprises a sixth lens and a seventh lens which are sequentially arranged from the object space to the image space; the four lens groups comprise an eighth lens and a ninth lens which are sequentially arranged from an object side to an image side; the fifth lens group comprises a tenth lens and an eleventh lens which are sequentially arranged from the object side to the image side; the working object distance of the microscope objective is larger than mm; according to the invention, the long working distance of the microscope objective is more than or equal to 2.8mm, so that the objective lens is prevented from touching oil stains or other pollutants on the sample to damage the objective lens.
Description
Technical Field
The invention relates to the technical field of microscopes, in particular to an optical microscope objective with a working distance of 40 times.
Background
The common biological optical microscope generally has 3 objective lenses, namely 10-time objective lenses, 40-time objective lenses and 100-time objective lenses, wherein the working distance of the 40-time objective lenses is 0.6mm mostly, and the working distance of the 100-time objective lenses is shorter; most of 100-time objective lenses are immersion type, the immersion type is oil immersion, water immersion and glycerol immersion, the oil immersion type is most widely used, while 40-time objective lenses are non-immersion type (dry type), oil in an oil lens is very easy to fall on a sample carrier in the using process, and when the 100-time objective lenses and the 40-time objective lenses are switched, the 40-time objective lenses are short in working distance and easy to be stained with the oil on the carrier to cause damage, so that the 40-time microscope objective lenses with long working distance are needed.
Disclosure of Invention
The objective lens of the optical microscope with the working distance of 40 times is provided to solve one of the defects caused by the prior art.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme: the 40-time working distance optical microscope objective lens is characterized by comprising a lens, wherein the lens comprises a first lens group, a second lens group, a third lens group, a fourth lens group and a fifth lens group which are sequentially arranged from an object side to an image side, the focal powers of the first lens group, the second lens group and the third lens group are positive, and the focal powers of the fourth lens group and the fifth lens group are negative; the first lens group comprises a first lens and a second lens which are sequentially arranged from an object side to an image side, the second lens group comprises a third lens and a fourth lens which are sequentially arranged from the object side to the image side, and the third lens group comprises a sixth lens and a seventh lens which are sequentially arranged from the object side to the image side; the four lens groups comprise an eighth lens and a ninth lens which are sequentially arranged from an object side to an image side; the fifth lens group comprises a tenth lens and an eleventh lens which are arranged in sequence from an object side to an image side; the working object distance of the microscope objective is larger than 2.8 mm.
Preferably, the objective lens for an optical microscope with a working distance of multiple length is characterized in that the first lens is a convex lens, the second lens is a plano-convex lens, the plane of the second lens faces the object space, the curved surface faces the image space, the second lens group is formed by gluing a third lens and a fourth lens, the third lens is a biconvex lens, the convex surface of the third lens with the smaller radius faces the object space, and the convex surface with the larger radius is a gluing surface; the fourth lens is a biconcave lens, the third lens group is formed by gluing a fifth lens and a sixth lens, the fifth lens is a biconvex lens, the convex surface with smaller radius of the fifth lens faces the object space, and the convex surface with larger radius is a gluing surface; the sixth lens is a biconcave lens; the eighth lens and the ninth lens are both negative lenses, and the eighth lens and the ninth lens are both biconcave lenses; the fifth lens group is formed by gluing a tenth lens and an eleventh lens, wherein the tenth lens is a meniscus lens, the concave surface of the tenth lens faces the object space, the convex surface of the tenth lens is a glued surface, the eleventh lens is a plano-convex lens, the plane of the eleventh lens is a glued surface, and the convex surface of the eleventh lens faces the image space.
Preferably, the objective lens for an optical microscope with a working distance of 40 times is characterized in that the numerical aperture of the objective lens is more than 0.75; the aperture angle is larger than 1.8 degrees, and the focal length is 5.94 mm.
Preferably, the objective lens for an optical microscope with a working distance of 40 times is characterized in that the focal length of the first lens is positive, the material of the first lens is H-ZLAF50B, the refractive index of the first lens is 1.527891, the abbe number of the first lens is 65.467687, the focal length of the second lens is positive, the refractive index of the second lens is 1.759843, and the abbe number of the second lens is 27.846352.
Preferably, the objective lens for an optical microscope with a working distance of 40 times as long is characterized in that the focal length of the third lens is positive, the refractive index of the third lens is 1.489593, and the abbe number of the third lens is 82.132549; the focal length of the fourth lens is negative, the refractive index of the fourth lens is 1.723684, and the abbe number of the fourth lens is 50.667235.
Preferably, in the objective lens for an optical microscope with a working distance of 40 times as long, the focal length of the fifth lens is positive, the refractive index of the fifth lens is 1.602531, the abbe number of the fifth lens is 56.83513, the focal length of the sixth lens is negative, the refractive index of the sixth lens is 1.977329, and the abbe number of the sixth lens is 17.063914.
Preferably, the objective lens for an optical microscope with a working distance of 40 times as long is characterized in that the focal length of the eighth lens is negative, the refractive index of the eighth lens is 1.765493, the abbe number of the eighth lens is 32.854183, the focal length of the ninth lens is negative, the refractive index of the ninth lens is 1.692541, and the abbe number of the ninth lens is 36.85253.
Preferably, the objective lens for an optical microscope with a working distance of 40 times is characterized in that the focal length of the tenth lens is positive, the refractive index of the tenth lens is 1.726276, the abbe number of the tenth lens is 50.365258, the focal length of the eleventh lens is positive, the refractive index is 1.842012, and the abbe number of the eleventh lens is 49.452153.
Preferably, the objective lens for an optical microscope with a working distance of 40 times is characterized in that the first lens, the third lens and the fifth lens are made of H-ZLAF 50B; the material of the second lens and the eleventh lens is H-ZF 52; the fourth lens, the sixth lens and the eighth lens are made of H-LAK 1.
According to the technical scheme, the embodiment of the invention at least has the following effects: the microscope objective lens has a long working distance which is more than or equal to 2.8mm, so that the damage of the objective lens caused by the fact that the objective lens touches oil stains or other pollutants on a sample is avoided; the design of the objective lens with long working distance is convenient to operate and is not easy to collide with the glass slide.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
wherein: 1-first lens, 2-second lens, 3-third lens, 4-fourth lens, 5-fifth lens, 6-sixth lens, 8-eighth lens, 9-ninth lens, 10-tenth lens, 11-eleventh lens.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1, the present invention discloses an objective lens of an optical microscope with a working distance of 40 times, which comprises five groups of lens groups arranged in sequence from an object side to an image side, wherein the five groups of lens groups from the object side to the image side respectively comprise: the first lens group, the second lens group, the third lens group, the fourth lens group and the fifth lens group comprise lenses, the lenses comprise the first lens group, the second lens group, the third lens group, the fourth lens group and the fifth lens group which are sequentially arranged from an object side to an image side, the focal powers of the first lens group, the second lens group and the third lens group are positive, and the focal powers of the fourth lens group and the fifth lens group are negative; the first lens group comprises a first lens 1 and a second lens 2 which are sequentially arranged from an object side to an image side, the second lens group comprises a third lens 3 and a fourth lens 4 which are sequentially arranged from the object side to the image side, and the third lens group comprises a sixth lens 6 and a seventh lens 7 which are sequentially arranged from the object side to the image side; the four lens groups comprise an eighth lens 8 and a ninth lens 9 which are sequentially arranged from an object side to an image side; the fifth lens group includes a tenth lens 10 and an eleventh lens 11 arranged in order from the object side to the image side.
The focal length of the first lens 1, which is a convex lens, is positive, the refractive index of the first lens 1 is 1.527891, and the abbe number of the first lens is 65.467687.
The second lens 2 is a plano-convex lens, the plane of the second lens 2 faces the object side, the curved surface faces the image side, the focal length of the second lens is positive, the refractive index of the second lens is 1.759843, and the abbe number of the second lens 2 is 27.846352.
The second lens group is formed by bonding a third lens and a fourth lens, the third lens 3 is a double-convex lens, the convex surface with the smaller radius of the third lens 3 faces the object space, the convex surface with the larger radius is a bonding surface, the focal length of the third lens 3 is positive, the refractive index 1.489593 of the third lens 3 is the refractive index 82.132549 of the third lens 3.
The fourth lens 4 is a biconcave lens, the focal length of the fourth lens 4 is negative, the refractive index of the fourth lens 4 is 1.723684, and the abbe number of the fourth lens 4 is 50.667235.
The third lens group is formed by gluing a fifth lens 5 and a sixth lens 6, wherein the fifth lens 5 is a double-convex lens, the convex surface with the smaller radius of the fifth lens 5 faces the object space, the convex surface with the larger radius is a gluing surface, the focal length of the fifth lens 5 is positive, the refractive index of the fifth lens 5 is 1.602531, and the abbe number of the fifth lens 5 is 56.83513.
The sixth lens 6 is a biconcave lens, the focal length of the sixth lens 6 is negative, the refractive index of the sixth lens 6 is 1.977329, and the abbe number of the sixth lens 6 is 17.063914.
The eighth lens 8 and the ninth lens 9 are both negative lenses, and the eighth lens 8 and the ninth lens 9 are both biconcave lenses; the focal length of the eighth lens 8 is negative, the refractive index of the eighth lens 8 is 1.765493, the Abbe number is 32.854183, the focal length of the ninth lens 9 is negative, the refractive index of the ninth lens 9 is 1.692541, and the Abbe number of the ninth lens 9 is 36.85253.
The fifth lens group is formed by gluing the tenth lens 10 and the eleventh lens 11, the tenth lens 10 is a meniscus lens, the concave surface of the tenth lens 10 faces the object space, the convex surface is a gluing surface, the eleventh lens 11 is a plano-convex lens, the plane of the eleventh lens 11 is a gluing surface, and the convex surface faces the image space. The tenth lens 10 has a positive focal length, the tenth lens 10 has a refractive index of 1.726276, the tenth lens 10 has an abbe number of 50.365258, the eleventh lens 11 has a positive focal length, a refractive index of 1.842012, and the eleventh lens 11 has an abbe number of 49.452153.
The minimum working object distance of the lens is 2.8mm, and the numerical aperture of the lens is at least 0.75 (NA).
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (9)
1. The 40-time working distance optical microscope objective lens is characterized by comprising a lens, wherein the lens comprises a first lens group, a second lens group, a third lens group, a fourth lens group and a fifth lens group which are sequentially arranged from an object side to an image side, the focal powers of the first lens group, the second lens group and the third lens group are positive, and the focal powers of the fourth lens group and the fifth lens group are negative; the first lens group comprises a first lens (1) and a second lens (2) which are sequentially arranged from an object side to an image side, the second lens group comprises a third lens (3) and a fourth lens (4) which are sequentially arranged from the object side to the image side, and the third lens group comprises a sixth lens (6) and a seventh lens (7) which are sequentially arranged from the object side to the image side; the four lens groups comprise an eighth lens (8) and a ninth lens (9) which are sequentially arranged from an object side to an image side; the fifth lens group comprises a tenth lens (10) and an eleventh lens (11) which are arranged in sequence from the object side to the image side; the working object distance of the microscope objective is larger than 2.8 mm.
2. The objective lens of a 40 × long working distance optical microscope according to claim 1, wherein the first lens (1) is a convex lens, the second lens (2) is a plano-convex lens, the second lens (2) is a plane surface facing an object side, and a curved surface facing an image side, the second lens group is formed by a third lens (3) and a fourth lens (4) which are cemented together, the third lens (3) is a biconvex lens, a convex surface of the third lens (3) with a smaller radius faces the object side, and a convex surface with a larger radius is a cemented surface; the fourth lens (4) is a biconcave lens, the third lens group is formed by gluing a fifth lens (5) and a sixth lens (6), the fifth lens (5) is a biconvex lens, a convex surface with a smaller radius of the fifth lens (5) faces an object space, and a convex surface with a larger radius is a gluing surface; the sixth lens (6) is a biconcave lens; the eighth lens (8) and the ninth lens (9) are both negative lenses, and the eighth lens (8) and the ninth lens (9) are both biconcave lenses; the fifth lens group is formed by gluing a tenth lens (10) and an eleventh lens (11), wherein the tenth lens (10) is a meniscus lens, the concave surface of the tenth lens (10) faces an object space, the convex surface of the tenth lens is a glued surface, the eleventh lens (11) is a plano-convex lens, the plane of the eleventh lens (11) is a glued surface, and the convex surface of the eleventh lens faces an image space.
3. A 40 x working distance optical microscope objective lens according to claim 1, wherein the objective lens has a numerical aperture of greater than 0.75; the aperture angle is larger than 1.8 degrees, and the focal length is 5.94 mm.
4. The objective lens of claim 1, wherein the focal length of the first lens (1) is positive, the material of the first lens (1) is H-ZLAF50B, the refractive index of the first lens (1) is 1.527891, and the abbe number of the first lens is 65.467687, the focal length of the second lens (2) is positive, the refractive index of the second lens is 1.759843, and the abbe number of the second lens (2) is 27.846352.
5. A 40 x working distance optical microscope objective lens according to claim 1, characterized in that the focal length of the three lenses (3) is positive, the refractive index 1.489593 of the third lens (3) and the abbe number 82.132549 of the third lens (3); the focal length of the fourth lens (4) is negative, the refractive index of the fourth lens (4) is 1.723684, and the abbe number of the fourth lens (4) is 50.667235.
6. The objective lens for a 40 × working distance optical microscope according to claim 1, wherein the focal length of the fifth lens (5) is positive, the refractive index of the fifth lens (5) is 1.602531, the abbe number of the fifth lens (5) is 56.83513, the focal length of the sixth lens (6) is negative, the refractive index of the sixth lens (6) is 1.977329, and the abbe number of the sixth lens (6) is 17.063914.
7. The objective lens for a 40 × long working distance optical microscope according to claim 1, wherein the focal length of the eighth lens (8) is negative, the refractive index of the eighth lens (8) is 1.765493, and the abbe number is 32.854183, the focal length of the ninth lens (9) is negative, the refractive index of the ninth lens (9) is 1.692541, and the abbe number of the ninth lens (9) is 36.85253.
8. The objective lens for a 40 × long working distance optical microscope according to claim 1, wherein the focal length of the tenth lens (10) is positive, the refractive index of the tenth lens (10) is 1.726276, the abbe number of the tenth lens (10) is 50.365258, the focal length of the eleventh lens (11) is positive, the refractive index is 1.842012, and the abbe number of the eleventh lens (11) is 49.452153.
9. The 40 × long working distance optical microscope objective according to claim 1, characterized in that the material of the first lens (1), the third lens (3), the fifth lens (5) is H-ZLAF 50B; the second lens (2) and the eleventh lens (11) are made of H-ZF 52; the fourth lens (4), the sixth lens (6) and the eighth lens (8) are made of H-LAK 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011252108.1A CN112578545A (en) | 2020-11-11 | 2020-11-11 | 40-time long working distance optical microscope objective |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011252108.1A CN112578545A (en) | 2020-11-11 | 2020-11-11 | 40-time long working distance optical microscope objective |
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| CN112578545A true CN112578545A (en) | 2021-03-30 |
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| CN202011252108.1A Pending CN112578545A (en) | 2020-11-11 | 2020-11-11 | 40-time long working distance optical microscope objective |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820834A (en) * | 2021-11-09 | 2021-12-21 | 张家港中贺自动化科技有限公司 | 60-time microscope objective lens |
| CN115202023A (en) * | 2022-07-29 | 2022-10-18 | 张家港中贺自动化科技有限公司 | Microscope objective lens with 5-time long working distance |
| CN115202024A (en) * | 2022-08-04 | 2022-10-18 | 张家港中贺自动化科技有限公司 | Microscope objective lens with 10-time long working distance |
-
2020
- 2020-11-11 CN CN202011252108.1A patent/CN112578545A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820834A (en) * | 2021-11-09 | 2021-12-21 | 张家港中贺自动化科技有限公司 | 60-time microscope objective lens |
| CN113820834B (en) * | 2021-11-09 | 2024-01-12 | 张家港中贺自动化科技有限公司 | 60 times microscope objective |
| CN115202023A (en) * | 2022-07-29 | 2022-10-18 | 张家港中贺自动化科技有限公司 | Microscope objective lens with 5-time long working distance |
| CN115202023B (en) * | 2022-07-29 | 2023-11-21 | 张家港中贺自动化科技有限公司 | Microscope objective lens with 5 times long working distance |
| CN115202024A (en) * | 2022-08-04 | 2022-10-18 | 张家港中贺自动化科技有限公司 | Microscope objective lens with 10-time long working distance |
| CN115202024B (en) * | 2022-08-04 | 2023-11-21 | 张家港中贺自动化科技有限公司 | Microscope objective lens with 10 times long working distance |
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Application publication date: 20210330 |