CN103941384B - Micro objective - Google Patents
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- CN103941384B CN103941384B CN201410088239.9A CN201410088239A CN103941384B CN 103941384 B CN103941384 B CN 103941384B CN 201410088239 A CN201410088239 A CN 201410088239A CN 103941384 B CN103941384 B CN 103941384B
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Abstract
Micro objective involved in the present invention is made up of 11 lens, wherein comprise 4 cemented doublet groups and 3 monolithics, from object space by having the hyper-hemispherical lens of positive light coke, the positive meniscus lens with positive light coke, the biconvex lens with positive light coke, two cemented doublet groups with positive light coke, the cemented doublet group with negative power, the cemented doublet group with negative power, the cemented doublet group with negative power form.Object lens moderate cost involved by patent of the present invention, rational technology, image quality is excellent, meets requirements of mass production.
Description
Technical field
The present invention relates to optical device, especially relate to a kind of micro objective.
Background technology
Current microscope is the most general instrument of human knowledge's microworld, in order to better understand more small biology and institutional framework, needs to adopt large multiplying power, the micro objective of large-numerical aperture.Optical microscope take air as medium, maximum numerical aperture can only be accomplished in theory close to 1, so increase numerical aperture to improve resolution, medium can be changed to the oil that refractive index is about 1.5, adopt hemispherical closest to object space lens like this, numerical aperture can accomplish about 1.3.
Summary of the invention
The invention provides a kind of novel micro objective, solve the problem that 100x oil mirror difficulty of processing is comparatively large, output is difficult to raising, its technical scheme is as described below:
A kind of micro objective, is made up of the first lens, the second lens, the 3rd lens, the 4th lens combination, the 5th lens combination, the 6th lens combination and the 7th lens combination from object space; Described first lens are the hyper-hemispherical lenss with positive light coke; Described second lens are the positive meniscus lenss with positive light coke; Described 3rd lens are the biconvex lens with positive light coke; Described 4th lens combination is two cemented doublet groups with positive light coke, comprises the 4th lens from object space and the 5th lens; Described 5th lens combination is the cemented doublet group with negative power, comprises the 6th lens from object space and the 7th lens; Described 6th lens combination is the cemented doublet group with negative power, comprises the 8th lens from object space and the 9th lens; Described 7th lens combination is the cemented doublet group composition with negative power, comprises the tenth lens from object space and the 11 lens.
Described micro objective meets:
2<f
L1/f
obj<2.5
Described f
l1the focal length of the first lens, described f
objit is the focal length of object lens.
Further, described micro objective meets:
6.5<f
L2/f
obj<7.8
Described f
l2the focal length of the second lens, described f
objit is the focal length of object lens.
Further, described micro objective meets:
10.1<f
L3/f
obj<12.9
Described f
l3the focal length of the 3rd lens, described f
objit is the focal length of object lens.
Further, described micro objective meets:
9.6<f
G5/f
obj<11.5
Described f
g5the combined focal length of the 4th lens combination and the 5th lens combination, described f
objit is the focal length of object lens.
Further, described micro objective meets:
-14.2<f
G3/f
obj<-5.8
Described f
g3the focal length of the 6th lens combination, described f
objit is the focal length of object lens.
Further, described micro objective meets:
-22.3<f
G4/f
obj<-18.1
Described f
g4the focal length of the 7th lens combination, described f
objit is the focal length of object lens.
Further, described 5th lens, the 6th lens all meet the following conditions:
1.46<nd<1.53
78<Vd<90
Wherein nd is the refractive index of spectrum when 546.07nm, and Vd is the Abbe number of spectrum when 546.07nm.
Described 9th lens, the tenth lens have relatively and the radius value of approximate size, and described 9th lens, the tenth lens all have thicker center thickness.Described 9th lens are just away from object space side radius value, and its radius value is less than 1.5mm, the tenth lens is negative near object space side radius value, and its radius value is greater than-1.5mm.Described 9th lens, the tenth lens center thickness are greater than 3mm.
The enlargement ratio of described micro objective is-100x, and image space linear field is 22mm, and the pipe mirror focal length that described micro objective can use is 185mm.Object lens involved in the present invention are while improve image quality, reduce the tolerance sensitivities of all eyeglasses, reduce the difficulty of processing of eyeglass, improve object lens qualification rate, reduce costs, because 100x oil mirror due to difficulty of processing larger, produce in enormous quantities is insoluble problem always, object lens moderate cost involved in the present invention, rational technology, image quality is excellent, meets requirements of mass production.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment 1-3 of micro objective provided by the invention;
Fig. 2 is 0 field-of-view lateral aberration diagram in embodiment 1;
Fig. 3 is 1 field-of-view lateral aberration diagram in embodiment 1;
Fig. 4 is the axial chromatic aberration figure in embodiment 1;
Fig. 5 is the curvature of field distortion figure in embodiment 1.
Embodiment
As shown in Figure 1, micro objective involved in the present invention is made up of 11 lens, wherein comprises 4 cemented doublet groups and 3 monolithics.Be made up of the first lens L1, the second lens L2, the 3rd lens L3, the 4th lens combination G1, the 5th lens combination G2, the 6th lens combination G3 and the 7th lens combination G4 from object space; Described first lens L1 is the hyper-hemispherical lens with positive light coke; Described second lens L2 is the positive meniscus lens with positive light coke, and two centers of curvature are positioned at object space side; Described 3rd lens L3 is the biconvex lens with positive light coke; Described 4th lens combination G1 is two cemented doublet groups with positive light coke, comprises the 4th lens L4 from object space and the 5th lens L5; Described 5th lens combination G2 is the cemented doublet group with negative power, comprises the 6th lens L6 from object space and the 7th lens L7; Described 6th lens combination 3G is the cemented doublet group with negative power, comprises the 8th lens L8 from object space and the 9th lens L9; Described 7th lens combination G4 is the cemented doublet group composition with negative power, comprises the tenth lens L10 from object space and the 11 lens L11.
9th lens L9 is double-concave negative lens, and the center of curvature of small sphere of exterior rearview is positioned at side, image space, and the center of curvature of large sphere is positioned at object space side; Tenth lens L10 is double-concave negative lens, and the center of curvature of small sphere of exterior rearview is positioned at object space side, and the center of curvature of large sphere is positioned at side, image space; 11 lens L11 is diverging meniscus lens, and two centers of curvature are positioned at object space side; L9, L10 are mainly used in correcting the curvature of field.
Object lens involved in the present invention essentially eliminate spherical aberration, coma, astigmatism, the curvature of field, distortion, chromatism of magnification and axial chromatic aberration, meet flat-field achromatic objective lens requirement.Peripheral field best focal point and central vision best focal point axial difference are less than 2 λ/NA
2, F light and C light achromatism, d light and g optical axis direction aberration are less than 2 λ/NA
2.
Concrete data are as shown in form one: focal distance f=1; NA=1.25;
Table 1
Fig. 2 is 0 field-of-view lateral aberration diagram in embodiment 1.In figure, horizontal ordinate PY, PX represent entrance pupil, ordinate EY, EX represent lateral aberration, wherein Y represents meridian direction, and X represents sagitta of arc direction, and each light letter shows, it is 0.4861 μm of light that F represents wavelength, it is 0.5876 μm of light that d represents wavelength, and it is 0.6563 μm of light that C represents wavelength, and it is 0.436 μm of light that g represents wavelength, aberration balancing is better as seen from the figure, and imaging is excellent.In figure, horizontal ordinate is normalization entrance pupil; Bottom declaratives MAXIMUMSCALE: ± 5 μm representative in figure, ordinate is 5 μm to the maximum, is minimumly-5 μm.
Fig. 3 is 1 field-of-view lateral aberration diagram in embodiment 1.In figure, horizontal ordinate PY, PX represent entrance pupil, and ordinate EY, EX represent lateral aberration, and wherein Y represents meridian direction, and X represents sagitta of arc direction, unit μm.It is 0.4861 μm of light that F represents wavelength, and it is 0.5876 μm of light that d represents wavelength, and it is 0.6563 μm of light that C represents wavelength, and it is 0.436 μm of light that g represents wavelength, and aberration balancing is better as seen from the figure, and imaging is excellent.In figure, horizontal ordinate is normalization entrance pupil; Bottom declaratives MAXIMUMSCALE: ± 5 μm representative in figure, ordinate is 5 μm to the maximum, is minimumly-5 μm.
Fig. 4 is the axial aberration figure in embodiment 1.In figure, ordinate represents entrance pupil, and horizontal ordinate represents longitudinal aberration, and unit is mm.It is 0.4861 μm of light that F represents wavelength, and it is 0.5876 μm of light that d represents wavelength, and it is 0.6563 μm of light that C represents wavelength, and it is 0.436 μm of light that g represents wavelength, as seen from the figure F light and C light achromatism, and d light and g optical axis direction aberration are less than 2 λ/NA
2.Close to half apochromatism level.In figure, ordinate is normalization entrance pupil; Horizontal ordinate represents longitudinal aberration, is 0.005mm to the maximum, and minimum is-0.005mm.
Fig. 5 is the curvature of field distortion figure in embodiment 1.Left figure is that in curvature of field figure, figure, ordinate represents visual field, and horizontal ordinate represents the curvature of field, and unit is μm.It is 0.4861 μm of light that F represents wavelength, and it is 0.5876 μm of light that d represents wavelength, and it is 0.6563 μm of light that C represents wavelength, and it is 0.436 μm of light that g represents wavelength.Peripheral field best focal point and central vision best focal point axial difference are less than 2 λ/NA
2, it is clear that theoretical value meets full filed, reaches flat-field objective requirement.In figure, ordinate is normalization visual field; Horizontal ordinate represents the curvature of field, is 2 μm to the maximum, is minimumly-2 μm.
Right figure is distortion figure, and in figure, ordinate represents visual field, horizontal ordinate representative distortion (number percent), it is 0.4861 μm of light that F represents wavelength, and it is 0.5876 μm of light that d represents wavelength, and it is 0.6563 μm of light that C represents wavelength, it is 0.436 μm of light that g represents wavelength, and distortion is less than 0.3% as seen from the figure.In figure, ordinate is normalization visual field; Horizontal ordinate representative distortion, be 0.5% to the maximum, minimum is-0.5%
As shown in Figure 1, micro objective involved in the present invention is made up of 11 lens the structural representation of embodiment 2, wherein comprises 4 cemented doublet groups and 3 monolithics.From object space by having the hyper-hemispherical lens L1 of positive light coke, the positive meniscus lens L2 with positive light coke, the biconvex lens L3 with positive light coke, two cemented doublet group G1 with positive light coke, the cemented doublet group G2 with negative power, the cemented doublet group G3 with negative power, the cemented doublet group G4 with negative power form.Wherein lens L1 is hemispherical; Lens L2 is positive meniscus lens, and two centers of curvature are positioned at object space side; Lens L9 is double-concave negative lens, and the center of curvature of small sphere of exterior rearview is positioned at side, image space, and the center of curvature of large sphere is positioned at object space side; Lens L10 is double-concave negative lens, and the center of curvature of small sphere of exterior rearview is positioned at object space side, and the center of curvature of large sphere is positioned at side, image space; Lens L11 is diverging meniscus lens, and two centers of curvature are positioned at object space side; L9, L10 are mainly used in correcting the curvature of field.
Concrete data are as shown in form two: focal distance f=1; NA=1.25;
Table 2
| Face is numbered | Radius | Thickness | nd | vd |
| 1 | infinity | 0.0929 | 1.5250 | 64.2000 |
| 2 | infinity | 0.1366 | 1.5150 | 43.9000 |
| 3 | infinity | 1.5464 | 1.5280 | 77.0000 |
| 4 | -1.1858 | 0.1093 | ||
| 5 | -5.4404 | 1.1995 | 1.8040 | 46.6000 |
| 6 | -3.1536 | 0.1093 | ||
| 7 | -121.7486 | 1.8852 | 1.5280 | 77.0000 |
| 8 | -5.0945 | 2.3934 | ||
| 9 | 42.8415 | 0.5464 | 1.6200 | 36.4000 |
| 10 | 4.3404 | 2.4044 | 1.5280 | 77.0000 |
| 11 | -7.2705 | 0.1585 | ||
| 12 | 9.2372 | 1.9344 | 1.5280 | 77.0000 |
| 13 | -5.5246 | 0.5464 | 1.6200 | 36.4000 |
| 14 | 22.5191 | 0.1016 | ||
| 15 | 4.9016 | 1.9290 | 1.5280 | 77.0000 |
| 16 | -5.5246 | 4.4153 | 1.6200 | 36.4000 |
| 17 | 1.1858 | 1.0929 | ||
| 18 | -1.1858 | 3.9235 | 1.6200 | 60.3000 |
| 19 | -5.5246 | 1.3661 | 1.8060 | 33.3000 |
| 20 | -3.8798 |
Equally as shown in Figure 1, micro objective involved in the present invention is made up of 11 lens the structural representation of embodiment 3, wherein comprises 4 cemented doublet groups and 3 monolithics.From object space by having the hyper-hemispherical lens L1 of positive light coke, the positive meniscus lens L2 with positive light coke, the biconvex lens L3 with positive light coke, two cemented doublet group G1 with positive light coke, the cemented doublet group G2 with negative power, the cemented doublet group G3 with negative power, the cemented doublet group G4 with negative power form.Wherein lens L1 is hemispherical; Lens L2 is positive meniscus lens, and two centers of curvature are positioned at object space side; Lens L9 is double-concave negative lens, and the center of curvature of small sphere of exterior rearview is positioned at side, image space, and the center of curvature of large sphere is positioned at object space side; Lens L10 is double-concave negative lens, and the center of curvature of small sphere of exterior rearview is positioned at object space side, and the center of curvature of large sphere is positioned at side, image space; Lens L11 is diverging meniscus lens, and two centers of curvature are positioned at object space side; L9, L10 are mainly used in correcting the curvature of field.
Concrete data are as shown in form three: focal distance f=1; NA=1.25;
Table 3
| Face is numbered | Radius | Thickness | nd | vd |
| 1 | infinity | 0.0923 | 1.5250 | 64.2000 |
| 2 | infinity | 0.1357 | 1.5150 | 43.9000 |
| 3 | infinity | 1.5770 | 1.5150 | 64.2000 |
| 4 | -1.1580 | 0.1100 | ||
| 5 | -5.2110 | 1.1900 | 1.6900 | 31.2000 |
| 6 | -2.8867 | 0.2300 | ||
| 7 | 19.1100 | 1.3900 | 1.4900 | 84.5000 |
| 8 | -8.1600 | 3.9600 | ||
| 9 | 14.2900 | 0.5400 | 1.7000 | 30.1000 |
| 10 | 5.1000 | 2.4400 | 1.4300 | 95.0000 |
| 11 | -5.4140 | 0.2700 | ||
| 12 | 7.2200 | 2.2800 | 1.4300 | 95.0000 |
| 13 | -5.6700 | 0.1100 | 1.6500 | 33.7000 |
| 14 | 54.1790 | 0.1100 | ||
| 15 | 3.6890 | 2.0600 | 1.4300 | 95.0000 |
| 16 | -12.1490 | 4.3400 | 1.7300 | 28.3000 |
| 17 | 1.2340 | 0.8100 | ||
| 18 | -1.0900 | 3.2660 | 1.5500 | 63.3000 |
| 19 | -6.0117 | 1.1390 | 1.8100 | 25.4000 |
| 20 | -3.5800 |
Object lens involved in the present invention essentially eliminate spherical aberration, coma, astigmatism, the curvature of field, distortion, chromatism of magnification and axial chromatic aberration, meet flat-field achromatic objective lens requirement, and peripheral field best focal point and central vision best focal point axial difference are less than 2 λ/NA
2, F light and C light achromatism, d light and g optical axis direction aberration are less than 2 λ/NA
2.
Claims (10)
1. a micro objective, is characterized in that: be made up of the first lens, the second lens, the 3rd lens, the 4th lens combination, the 5th lens combination, the 6th lens combination and the 7th lens combination from object space; Described first lens are the hyper-hemispherical lenss with positive light coke; Described second lens are the positive meniscus lenss with positive light coke; Described 3rd lens are the biconvex lens with positive light coke; Described 4th lens combination is two cemented doublet groups with positive light coke, comprises the 4th lens from object space and the 5th lens; Described 5th lens combination is the cemented doublet group with negative power, comprises the 6th lens from object space and the 7th lens; Described 6th lens combination is the cemented doublet group with negative power, comprises the 8th lens from object space and the 9th lens; Described 7th lens combination is the cemented doublet group composition with negative power, comprises the tenth lens from object space and the 11 lens.
2. micro objective according to claim 1, is characterized in that: described micro objective meets:
2<f
L1/f
obj<2.5
Described f
l1the focal length of the first lens, described f
objit is the focal length of object lens.
3. micro objective according to claim 1, is characterized in that: described micro objective meets:
6.5<f
L2/f
obj<7.8
Described f
l2the focal length of the second lens, described f
objit is the focal length of object lens.
4. micro objective according to claim 1, is characterized in that: described micro objective meets:
10.1<f
L3/f
obj<12.9
Described f
l3the focal length of the 3rd lens, described f
objit is the focal length of object lens.
5. micro objective according to claim 1, is characterized in that: described micro objective meets:
9.6<f
G5/f
obj<11.5
Described f
g5the combined focal length of the 4th lens combination and the 5th lens combination, described f
objit is the focal length of object lens.
6. micro objective according to claim 1, is characterized in that: described micro objective meets:
-14.2<f
G3/f
obj<-5.8
Described f
g3the focal length of the 6th lens combination, described f
objit is the focal length of object lens.
7. micro objective according to claim 1, is characterized in that: described micro objective meets:
-22.3<f
G4/f
obj<-18.1
Described f
g4the focal length of the 7th lens combination, described f
objit is the focal length of object lens.
8. micro objective according to claim 1, is characterized in that: described 5th lens, the 6th lens all meet the following conditions:
1.46<nd<1.53
78<Vd<90
Wherein nd is the refractive index of spectrum when 546.07nm, and Vd is the Abbe number of spectrum when 546.07nm.
9. micro objective according to claim 1, is characterized in that: described 9th lens are just away from object space side radius value, and its radius value is less than 1.5mm, and the tenth lens are negative near object space side radius value, and its radius value is greater than-1.5mm.
10. micro objective according to claim 1, is characterized in that: described 9th lens, the tenth lens center thickness are greater than 3mm.
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| CN201410088239.9A CN103941384B (en) | 2014-03-11 | 2014-03-11 | Micro objective |
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|---|---|---|---|
| CN201410088239.9A CN103941384B (en) | 2014-03-11 | 2014-03-11 | Micro objective |
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| CN103941384B true CN103941384B (en) | 2015-12-09 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280867B (en) * | 2014-10-29 | 2016-06-15 | 南京恒磊光学技术研究有限公司 | A kind of microscope objective |
| CN104360459B (en) * | 2014-12-01 | 2016-06-08 | 东莞市奥普特自动化科技有限公司 | 35mm focusing machine visual lens |
| CN106772933B (en) * | 2016-11-21 | 2019-09-20 | 中国科学院上海光学精密机械研究所 | The big visual field microcobjective optical system of wide spectrum |
| CN110716299B (en) * | 2019-11-08 | 2021-02-02 | 山西大学 | Long working distance microobjective with numerical aperture of 0.55 |
| CN111158129B (en) * | 2020-01-15 | 2021-11-23 | 宁波舜宇仪器有限公司 | Microscope objective |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2584392A2 (en) * | 2011-10-20 | 2013-04-24 | Carl Zeiss Microscopy GmbH | Plane apochromatically corrected microscope lens |
| CN103235404A (en) * | 2008-04-11 | 2013-08-07 | 株式会社尼康 | Microscope objective lens |
| CN203759351U (en) * | 2014-03-11 | 2014-08-06 | 宁波舜宇仪器有限公司 | Microscope objective lens |
-
2014
- 2014-03-11 CN CN201410088239.9A patent/CN103941384B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235404A (en) * | 2008-04-11 | 2013-08-07 | 株式会社尼康 | Microscope objective lens |
| EP2584392A2 (en) * | 2011-10-20 | 2013-04-24 | Carl Zeiss Microscopy GmbH | Plane apochromatically corrected microscope lens |
| CN203759351U (en) * | 2014-03-11 | 2014-08-06 | 宁波舜宇仪器有限公司 | Microscope objective lens |
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