CN118033871B - 10 Times large-angle industrial microscope objective lens - Google Patents
10 Times large-angle industrial microscope objective lens Download PDFInfo
- Publication number
- CN118033871B CN118033871B CN202410284186.1A CN202410284186A CN118033871B CN 118033871 B CN118033871 B CN 118033871B CN 202410284186 A CN202410284186 A CN 202410284186A CN 118033871 B CN118033871 B CN 118033871B
- Authority
- CN
- China
- Prior art keywords
- lens
- microscope objective
- industrial microscope
- eleventh
- diopter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005499 meniscus Effects 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 abstract description 6
- 230000001681 protective effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Abstract
The invention relates to a 10-time large-angle industrial microscope objective lens. The invention relates to a 10 times large angle industrial microscope objective lens, which sequentially comprises the following components from an image surface to an object surface: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens, and a thirteenth lens; the first, third, fourth, seventh, eighth, tenth, and twelfth lenses have negative refractive power; the second, fifth, sixth, ninth, eleventh, thirteenth lenses have positive diopters. The 10-time large-angle industrial microscope objective lens has the advantages of long working distance, high optical resolution, wide wavelength range and large camera target surface.
Description
Technical Field
The invention relates to the field of microscopes, in particular to a large-angle industrial microscope objective lens.
Background
The microscope is used as an important instrument for observing tiny objects, has wide application, and along with the continuous expansion of application fields, the requirements on the microscope are higher and higher. In the use field in the industrial field, in order to prevent excessive approaching to a target, the working distance of a microscope objective lens is generally required to be long, and a wide wavelength range and a large camera target surface are required.
However, an objective lens with a better optical resolution tends to have a smaller working distance, poorer operability and working adaptability, and inconvenient use.
Disclosure of Invention
Based on this, the object of the present invention is to provide a 10-fold large angle industrial microscope objective lens which has the advantages of long working distance, high optical resolution, wide wavelength range, and large camera target surface.
The industrial microscope objective lens with the 10-time large angle sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens from an image surface to an object surface;
the first, third, fourth, seventh, eighth, tenth, and twelfth lenses have negative refractive power; the second, fifth, sixth, ninth, eleventh, thirteenth lenses have positive refractive power;
The first lens, the second lens and the third lens form a first lens group; the fourth lens and the fifth lens form a second lens group; the sixth lens and the seventh lens form a third lens group; the eighth lens, the ninth lens and the tenth lens form a fourth lens group; the twelfth lens and the thirteenth lens form a fifth lens group;
the first and second lens groups have negative refractive power, and the third, fourth, fifth, and eleventh lens groups have positive refractive power.
The industrial microscope objective with the large angle of 10 times has better resolution and longer working distance, thereby improving the operability and having good working adaptability.
Further, the first lens is a biconcave negative diopter lens; the second lens is a biconvex positive diopter lens; the third lens is a biconcave negative diopter lens; the fourth lens is a biconcave negative diopter lens; the fifth lens is a biconvex positive diopter lens; the sixth lens is a biconvex positive diopter lens; the seventh lens is a meniscus negative diopter lens, and the convex surface faces to the object side; the eighth lens is a meniscus negative diopter lens, and the concave surface faces the object side; the ninth lens is a biconvex positive diopter lens; the tenth lens is a meniscus negative diopter lens, and the convex surface faces to the object side; the eleventh lens is a biconvex positive diopter lens; the twelfth lens is a meniscus negative diopter lens, and the concave surface faces to the object side; the thirteenth lens is a biconvex positive diopter lens.
Further, the first lens, the second lens and the third lens are sequentially closely connected to form a first cemented lens group; the fourth lens is closely connected with the fifth lens to form a second cemented lens group; the focal length of the first cemented lens group is f (G1), and the focal length of the second cemented lens group is f (G2); the first cemented lens group and the second cemented lens group satisfy the following relation;
-100＜f(G1)＜0；-50＜f(G2)＜-10。
further, the effective focal length of the 10 times large-angle industrial microscope objective lens is f, the effective focal length of the eleventh lens is f11, and the eleventh lens meets the following relation;
0<f11/f<3。
further, the refractive index of the second lens is n (L2), the abbe number is V (L2), and the second lens satisfies the following condition;
1.83<n(L2)<2.1；
35<V(L2)<42。
further, the ninth lens has a refractive index of n (L9), an abbe number of V (L9), and the ninth lens satisfies the following condition;
1.4<n(L9)<1.6；
80<V(L9)<100。
Further, the interval between the fifth lens and the sixth lens is 0.1mm; the interval between the third lens and the fourth lens is 5.41mm; the interval between the eleventh lens and the twelfth lens is 0.28mm.
Further, the lens assembly further comprises an aperture, wherein the aperture is arranged between the tenth lens and the eleventh lens.
Further, the lenses of the 10-times large-angle industrial microscope objective lens are all spherical lenses.
For a better understanding and implementation, the present invention is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic view of the structure of an objective lens of a 10-fold large angle industrial microscope according to an embodiment of the present invention;
FIG. 2 is a schematic view of the optical path of a 10-fold large angle industrial microscope objective according to an embodiment of the present invention;
FIG. 3 is a graph of field curvature and distortion of an objective lens for a 10-fold large angle industrial microscope according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of MTF of a 10 Xwide angle industrial microscope objective lens according to an embodiment of the present invention;
FIG. 5 is a schematic RMS diagram of a 10 Xwide angle industrial microscope objective according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "vertical direction", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific azimuth, and are constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, thermally conductive, detachably or integrally connected, mechanically connected, electrically connected, directly connected, or connected via an intermediary, or may be a communication 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 according to the specific circumstances.
Examples
Referring to fig. 1 and 2, an embodiment of the present application provides a 10 x wide angle industrial microscope objective. The 10-fold large-angle industrial microscope objective lens sequentially comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, a twelfth lens L12 and a thirteenth lens L13 from an image plane to an object plane along an optical axis.
The first lens L1 is a biconcave negative diopter lens; a second lens L2 biconvex positive diopter lens; the third lens L3 is a biconcave negative diopter lens; the fourth lens L4 is a biconcave negative diopter lens; the fifth lens L5 is a biconvex positive diopter lens; the sixth lens L6 is a biconvex positive diopter lens; the seventh lens L7 is a meniscus negative diopter lens, and the convex surface faces the object side; an eighth lens L8 meniscus type negative diopter lens with a concave surface facing the object side; the ninth lens L9 is a biconvex positive diopter lens; the tenth lens L10 is a meniscus negative diopter lens with the convex surface facing the object side; the eleventh lens L11 is a biconvex positive refractive lens; the twelfth lens L12 is a meniscus negative diopter lens, and the concave surface faces the object side; the thirteenth lens L13 is a biconvex positive refractive lens.
In some embodiments, the 10 x large angle industrial microscope objective further comprises an aperture stop disposed between the tenth lens L10 and the eleventh lens L11. Further, the lens further comprises a protective glass or a protective lens, and the protective glass or the protective lens is arranged between the thirteenth lens L13 and the object plane.
Further, the first lens L1, the second lens L2, and the third lens L3 form a first lens group; the fourth lens L4 and the fifth lens L5 form a second lens group; the sixth lens L6 and the seventh lens L7 form a third lens group; the eighth lens L8, the ninth lens L9, and the tenth lens L10 form a fourth lens group; the twelfth lens L12 and the thirteenth lens L13 form a fifth lens group;
The first and second lens groups have negative refractive power and the third, fourth, and fifth lens groups have positive refractive power.
In some embodiments, the first lens L1, the second lens L2, and the third lens L3 are sequentially closely adhered to form a first cemented lens group; the fourth lens L4 and the fifth lens L5 are closely adhered to form a second cemented lens group. Wherein, the focal length of the first cemented lens group is set to f (G1), and the focal length of the second cemented lens group is set to f (G2). The first cemented lens group and the second cemented lens group satisfy the following conditions:
-100＜f(G1)＜0；
-50＜f(G2)＜-10。
Further, the sixth lens L6 and the seventh lens L7 are closely adhered to form a third cemented lens group; the eighth lens L8, the ninth lens L9 and the tenth lens L10 are sequentially closely connected to form a fourth cemented lens group; the twelfth lens L12 and the thirteenth lens L13 are closely contacted to form a fifth cemented lens group.
Further, the effective focal length of the 10-fold large-angle industrial microscope objective lens is f, the effective focal length of the eleventh lens L11 is f11, and the eleventh lens L11 satisfies the following condition:
0<f11/f<3。
Further, the refractive index of the second lens L2 is set to n (L2), the abbe number is set to V (L2), and the second lens L2 satisfies the following condition:
1.83<n(L2)<2.1；
35<V(L2)<42。
The refractive index of the ninth lens L9 is n (L9), the abbe number is V (L9), and the ninth lens L9 satisfies the following condition:
1.4<n(L9)<1.6；
80<V(L9)<100。
Further, the interval between the fifth lens L5 and the sixth lens L6 is 0.1mm; the interval between the third lens L3 and the fourth lens L4 is 5.41mm; the interval between the eleventh lens L11 and the twelfth lens L12 is 0.28mm.
Further, the lenses of the 10 times larger angle industrial microscope objective lens of the embodiment of the application are all spherical lenses.
The relevant parameters of each lens of the objective lens of the 10-times large-angle industrial microscope of the embodiment of the invention are shown in the following table. In this example, the detailed optical parameters of the 10-fold wide angle industrial microscope objective are shown in table 1:
[ Table 1]
Wherein S1 is an image end face of the first lens L1, S2 is an object end face of the first lens L1 and an image end face of the second lens L2, S3 is an object end face of the second lens L2 and an image end face of the third lens L3, S4 is an object end face of the third lens L3, S5 is an image end face of the fourth lens L4, S6 is an object end face of the fourth lens L4 and an image end face of the fifth lens L5, S7 is an object end face of the fifth lens L5, S8 is an image end face of the sixth lens L6, S9 is an object end face of the sixth lens L6 and an image end face of the seventh lens L7, S10 is an object end face of the seventh lens L7, S11 is an image end face of the eighth lens L8, S12 is an object end face of the eighth lens L8 and an image end face of the ninth lens L9, S13 is an object end face of the ninth lens L9, S6 is an object end face of the tenth lens L10, S7 is an object end face of the fifth lens L5, S7 is an object end face of the aperture, S16 is an object end face of the eleventh lens L11, S12 is an object end face of the eleventh lens is an image end face of the eighth lens L12, S12 is an image end face of the eighth lens is an image end face of the lens is an image end of the lens is 11.
Further, the industrial microscope objective with the 10 times large angle provided by the invention has the focal length f=20 mm, the object distance (working distance) of 26mm, the average distortion of less than or equal to 0.5%, the numerical aperture NA=0.3, the maximum field angle 2ω of 12.6 degrees, the focal length of 95mm and the applicable spectrum range of 436 nm-1064 nm.
Referring to fig. 3 to 5, fig. 3 is a field curvature and distortion diagram of a 10 times large angle industrial microscope objective lens according to an embodiment of the present application, wherein the field curvature of the 10 times large angle industrial microscope objective lens according to the embodiment of the present application is controlled within 2 micrometers, and the maximum distortion is less than 0.5%; fig. 4 is a schematic view of MTF (modulation transfer function analysis) of a 10-fold large-angle industrial microscope objective, and fig. 5 is a schematic view of RMS of a 10-fold large-angle industrial microscope objective, which is small in RMS radius and aberration in the embodiment of the application. The industrial microscope objective with the angle of 10 times of large is large in working distance, good in resolution and large in target surface, and has excellent operability and working adaptability.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the invention, and the invention is intended to encompass such modifications and improvements.
Claims (9)
1. A 10-fold wide angle industrial microscope objective, characterized by: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, a twelfth lens and a thirteenth lens in sequence from an image surface to an object surface;
the first, third, fourth, seventh, eighth, tenth, and twelfth lenses have negative refractive power; the second, fifth, sixth, ninth, eleventh, thirteenth lenses have positive refractive power;
The first lens, the second lens and the third lens form a first lens group; the fourth lens and the fifth lens form a second lens group; the sixth lens and the seventh lens form a third lens group; the eighth lens, the ninth lens and the tenth lens form a fourth lens group; the twelfth lens and the thirteenth lens form a fifth lens group;
the first and second lens groups have negative refractive power, and the third, fourth, fifth, and eleventh lens groups have positive refractive power.
2. The 10 x wide angle industrial microscope objective of claim 1, wherein: the first lens is a biconcave negative diopter lens; the second lens is a biconvex positive diopter lens; the third lens is a biconcave negative diopter lens; the fourth lens is a biconcave negative diopter lens; the fifth lens is a biconvex positive diopter lens; the sixth lens is a biconvex positive diopter lens; the seventh lens is a meniscus negative diopter lens, and the convex surface faces to the object side; the eighth lens is a meniscus negative diopter lens, and the concave surface faces the object side; the ninth lens is a biconvex positive diopter lens; the tenth lens is a meniscus negative diopter lens, and the convex surface faces to the object side; the eleventh lens is a biconvex positive diopter lens; the twelfth lens is a meniscus negative diopter lens, and the concave surface faces to the object side; the thirteenth lens is a biconvex positive diopter lens.
3. The 10 x wide angle industrial microscope objective of claim 2, wherein: the first lens, the second lens and the third lens are sequentially and closely connected to form a first cemented lens group; the fourth lens is closely connected with the fifth lens to form a second cemented lens group; the focal length of the first cemented lens group is f (G1), and the focal length of the second cemented lens group is f (G2); the first cemented lens group and the second cemented lens group satisfy the following relation;
-100＜f(G1)＜0；
-50＜f(G2)＜-10。
4. A 10 x wide angle industrial microscope objective according to claim 3, characterized in that:
The effective focal length of the industrial microscope objective lens with the 10 times large angle is f, the effective focal length of the eleventh lens is f11, and the eleventh lens meets the following relational expression;
0<f11/f<3。
5. the 10 x wide angle industrial microscope objective of claim 4, wherein: the refractive index of the second lens is n (L2), the Abbe number is V (L2), and the second lens meets the following conditions;
1.83<n(L2)<2.1；
35<V(L2)<42。
6. The 10 x wide angle industrial microscope objective of claim 5, wherein: the ninth lens has a refractive index of n (L9), an abbe number of V (L9), and satisfies the following condition;
1.4<n(L9)<1.6；
80<V(L9)<100。
7. The 10 x wide angle industrial microscope objective of claim 6, wherein: the interval between the fifth lens and the sixth lens is 0.1mm; the interval between the third lens and the fourth lens is 5.41mm; the interval between the eleventh lens and the twelfth lens is 0.28mm.
8. The 10 x wide angle industrial microscope objective of any one of claims 1-7, wherein: the lens assembly further comprises an aperture, and the aperture is arranged between the tenth lens and the eleventh lens.
9. The 10 x wide angle industrial microscope objective of claim 8, wherein: the lenses of the industrial microscope objective lens with the 10 times large angle are spherical lenses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410284186.1A CN118033871B (en) | 2024-03-13 | 10 Times large-angle industrial microscope objective lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410284186.1A CN118033871B (en) | 2024-03-13 | 10 Times large-angle industrial microscope objective lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118033871A CN118033871A (en) | 2024-05-14 |
| CN118033871B true CN118033871B (en) | 2024-07-12 |
Family
ID=
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805318A (en) * | 2021-10-18 | 2021-12-17 | 成都威正数码科技有限公司 | Camera lens, camera module and shooting equipment |
| CN114114613A (en) * | 2021-11-01 | 2022-03-01 | 湖南长步道光学科技有限公司 | Ultralow distortion optical system and industrial lens |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805318A (en) * | 2021-10-18 | 2021-12-17 | 成都威正数码科技有限公司 | Camera lens, camera module and shooting equipment |
| CN114114613A (en) * | 2021-11-01 | 2022-03-01 | 湖南长步道光学科技有限公司 | Ultralow distortion optical system and industrial lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109061862B (en) | Microscope objective lens with large visual field number | |
| US4189211A (en) | Wide angle telecentric projection lens assembly | |
| US20100177404A1 (en) | Dry-type microscope objective lens | |
| CN111158129B (en) | Microscope objective | |
| US9869850B2 (en) | Variable-magnification observation optical system | |
| EP0727683B1 (en) | Zoom lens and video camera comprising the same | |
| KR19980068066A (en) | zoom lens | |
| CN116184635A (en) | Lens and imaging device | |
| CN114019665A (en) | Microscope objective | |
| CN118033871B (en) | 10 Times large-angle industrial microscope objective lens | |
| CN111722384A (en) | Zoom lens | |
| CN118033871A (en) | 10 Times large-angle industrial microscope objective lens | |
| US6320702B1 (en) | Afocal zoom lens, and microscope having the lens | |
| GB2286253A (en) | Real image type variable power view-finder | |
| CN110764238A (en) | Wide-angle low-distortion large-target-surface continuous zoom lens capable of eliminating heat difference | |
| CN112305730A (en) | Zoom lens | |
| CN221225141U (en) | Microscope objective | |
| US20030169510A1 (en) | Zoom lens and video camera comprising the same | |
| RU222247U1 (en) | Mirror-lens binoculars | |
| GB2573928A (en) | Two-group-type zoom lens and usage method therefor, and imaging apparatus comprising same | |
| JP3723640B2 (en) | Telescope optics | |
| CN114002815B (en) | Microscope objective lens with large numerical aperture and long working distance | |
| RU210434U1 (en) | reflex binoculars | |
| CN117991482B (en) | High-zoom-ratio sighting telescope optical system | |
| SU1645925A1 (en) | Binocular instrument optical system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |