CN103558676B - 6 times of SLWD object lens - Google Patents
6 times of SLWD object lens Download PDFInfo
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- CN103558676B CN103558676B CN201310546824.4A CN201310546824A CN103558676B CN 103558676 B CN103558676 B CN 103558676B CN 201310546824 A CN201310546824 A CN 201310546824A CN 103558676 B CN103558676 B CN 103558676B
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Abstract
The invention discloses a kind of 6 times of long reach object lens, whole system is made up of two large constituent elements, and the first constituent element has positive focal power, and the second constituent element has negative focal power; First constituent element is made up of three lens combination; Second constituent element is made up of the 4th lens combination; The focal length of the first constituent element is fG1, and the focal length of the second constituent element is fG2, then meet the following conditions between them: 0.98<| fG2/ fG1|<1.35; In first constituent element in each lens combination, the focal length of the first lens combination is fL1, the focal length of the second lens combination is fL2, the focal length of the 3rd lens combination is fL3, they meet the following conditions: 119<fL2<135,0.5< fL1/ fL3<0.7; The focal length of the second constituent element is fG2, and it meets the following conditions :-78< fG2<-70.It is little that the present invention solves object lens observation visual field, and exit pupil diameter is little, and imaging clearly scope is difficult to the problem reaching 100%.
Description
Technical field
The present invention relates to optical element technology field, especially a kind of be used for observing front optical system become the visual optical device of image.
Background technology
Wide view field microscope is the wide Novel microscope in a kind of visual field, can take into account clear picture simultaneously, and exit pupil diameter is large, has to observe comfortable, easy to operate, and the characteristic that stereoscopic sensation is strong, is widely used in the fields such as biological dissection, electronics industry, mineral research.In wide view field microscope, microscopical amplification depends primarily on object lens, and the quality of object lens quality directly affects microscope imaging quality, and it is the critical piece determining microscopical resolution and imaging clearly degree.Object lens are important component parts for optical visual instrument, and its effect zooms into first picture to object, and this first picture amplifies to obtain larger enlargement factor to carry out visualization through eyepiece more further.Traditional as stereomicroscope object lens, biology microscope endoscope objective lens, when using this kind of object lens because imaging viewing field scope is less, object lens emergent pupil is little, and imaging clearly scope is difficult to reach 100%, this just cannot provide enough large observation visual field to operator, and in observation process, require that the eye pupil of observer accurately aims at the emergent pupil of object lens all the time, otherwise there will be the phenomenon that visual field is blocked, be easy to the fatigue causing observer like this.
Summary of the invention
The object of this invention is to provide a kind of 6 times of SLWD object lens, it is little that it can solve existing object lens observation visual field, and exit pupil diameter is little, and imaging clearly scope is difficult to the problem reaching 100%.
In order to solve the problem, the technical solution used in the present invention is: this 6 times of SLWD object lens, and the direction included from the object side to the image side is seen, whole system structure is made up of two large constituent elements, first constituent element has positive focal power, and the second constituent element has negative focal power; Described first constituent element is by the first lens combination, and the second lens combination and the 3rd lens combination form, and the first lens combination (L1) and the 3rd lens combination (L3) are arranged in the both sides of the second lens combination (L2); Described second constituent element is made up of the 4th lens combination;
First lens combination is a gummed group with positive light coke, is glued together form by the first positive lens and the first negative lens, and the first positive lens adopts bent moon version, concave surface facing object space, and convex surface is cemented surface; First negative lens adopts bent moon version, convex surface facing image space;
Second lens combination is only made up of the second positive lens, and the second positive lens is the single-positive-lens of a biconvex, radius-of-curvature less convex surface facing object space, radius-of-curvature larger convex surface facing image space;
3rd lens combination is a gummed group with positive light coke, is glued together form by the 3rd negative lens and the 3rd positive lens; 3rd negative lens adopts bent moon version, and convex surface facing object space, concave surface is cemented surface, and the 3rd positive lens adopts bent moon version, and convex surface is cemented surface, concave surface facing image space;
4th lens combination is a gummed group with negative power, is glued together form by the 4th negative lens and the 4th positive lens; 4th negative lens adopts double-concave structure form, the concave surface facing object space that radius-of-curvature is larger, and the concave surface that radius-of-curvature is less is cemented surface, and the 4th positive lens adopts bent moon version, and convex surface is cemented surface, concave surface facing image space;
The focal length of the first constituent element is fG1, and the focal length of the second constituent element is fG2, then meet the following conditions between them: 0.98<| fG2/ fG1|<1.35.
In the technical scheme of above-mentioned 6 times of SLWD object lens, technical scheme can also be more specifically: in described first constituent element in each lens combination, the focal length of the first lens combination is fL1, the focal length of the second lens combination is fL2, the focal length of the 3rd lens combination is fL3, they meet the following conditions: 119<fL2<135,0.5< fL1/ fL3<0.7;
The focal length of the second constituent element is fG2, and it meets the following conditions :-78< fG2<-70.
Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect:
1, optical image of the present invention is of fine quality different, has high definition, high resolving power, high one-tenth image contrast.
2, the present invention uses the microscope of formation together with the spherical reflector in tube lens and Large visual angle microscopic system, can take into account clear picture scope while visual field is wide and reach 100%, exit pupil diameter is large, observes comfortable, have easy to operate, the characteristic that imaging volume sense is strong.
3, the present invention has the advantages that operating distance is long, image space is large, and processing technology is good.
Accompanying drawing explanation
Fig. 1 is optical system schematic diagram of the present invention.
Fig. 2 be with the present invention with the use of the structural representation of tube lens.
Fig. 3 is embodiment of the present invention optical transfer function figure.
Fig. 4 embodiment of the present invention spherical aberration curve map.
Embodiment
Below in conjunction with accompanying drawing embodiment, the invention will be further described:
6 times of SLWD object lens of Fig. 1 are one of them camera lenses of wide view field microscope, have the advantages that operating distance is long, image space is large, the curvature of field controls at certain fixed value (about R-420), substantially equal with the spherical radius R value of the spherical reflector in system.Direction is from the object side to the image side seen, whole system structure is made up of the large constituent element of G1, G2 two, and the first constituent element G1 has positive focal power, and the second constituent element G2 has negative focal power.First constituent element G1 is made up of 3 lens combination, and the second constituent element G2 is made up of a lens combination.First constituent element G1 has the first lens combination L1, the second lens combination L2 and the 3rd lens combination L3; 3 lens combination L1, L2, L3 substantially press symmetric form with the second lens combination L2 for axis of symmetry and arrange, are conducive to like this correcting vertical axial aberration.
First lens combination L1 is a gummed group with positive light coke, is glued together form by the first positive lens L11 and the first negative lens L12, and the first positive lens L11 adopts bent moon version, concave surface facing object space, and convex surface is cemented surface; And the first negative lens L12 adopts bent moon version, convex surface facing image space.
Second lens combination L2 is the second positive lens, is the single-positive-lens of a biconvex, radius-of-curvature less convex surface facing object space, radius-of-curvature larger convex surface facing image space.
3rd lens combination L3 is a gummed group with positive light coke, is glued together form by the 3rd negative lens L31 and the 3rd positive lens L32; 3rd negative lens L31 adopts bent moon version, and convex surface facing object space, concave surface is cemented surface, and the 3rd positive lens L32 adopts bent moon version, and convex surface is cemented surface, concave surface facing image space.
4th lens combination L4 is a gummed group with negative power, is glued together form by the 4th negative lens L41 and the 4th positive lens L42; 4th negative lens L41 adopts double-concave structure form, the concave surface facing object space that radius-of-curvature is larger, and the concave surface that radius-of-curvature is less is cemented surface; 4th positive lens L42 adopts bent moon version, and convex surface is cemented surface, concave surface facing image space.
The focal length of the first constituent element G1 is f
g1, the focal length of the second constituent element G2 is f
g2, then meet the following conditions between them: 0.98<| f
g2/ f
g1| <1.35.When | f
g1/ f
g2| value when being less than 0.98, the clear aperture of the first constituent element G1 can become very large, in order to aberration correction will cause structure to become very complicated, and the second order spectrum that system can be larger, reduces the optical property of system; When | f
g1/ f
g2| value when being greater than 1.35, the object space operating distance of camera lens becomes shorter, can not meet request for utilization.
Each lens combination in first constituent element G1, the focal length of the first lens combination L1 is f
l1, the focal length of the second lens combination L2 is f
l2, the focal length of the 3rd lens combination L3 is f
l3, they meet the following conditions: 119<f
l2<135,0.5< f
l1/ f
l3<0.7.The first lens combination L1 in first constituent element G1, the 3rd lens combination L3 are that symcenter is arranged symmetrically with according to the second lens combination L2 in form, but the actual operating conditions due to camera lens deviate from desirable symmetry status, so with condition 0.5< f
l1/ f
l3<0.7 retrains the symmetrical degree of this two lens combination L1, L3 skews, realizes the well-corrected of vertical aberration.
The focal length of the second constituent element G2 is f
g2, it meets the following conditions :-78< f
g2<-70, it is decided by the mechanical design requirements of camera lens.
Image distance due to 6 times of SLWD object lens is infinity, and that is its conjugate distance is infinity, and it must use together with tube lens, the final imaging of ability; The structure of tube lens as shown in Figure 2.
Table 1 data are an example of camera lens of the present invention; Object lens optical parametric from left to right and characteristic as shown in the table.
Table 1
Optical system parameter: NA=0.17, WD=115mm, β=-6 ×, f=72.3mm
Table 2 is the parameter of tube lens
Table 2
As can be seen from the numerical value in above-mentioned table 1 and table 2 form, the R value in each face is quite reasonable, and the face type of eyeglass can be guaranteed well, is conducive to the control improving sphere precision.Glass used is all conventional material, is easy to buying, and physics, chemical property are very stable, meets the condition of batch production.Fig. 3 is embodiment of the present invention optical transfer function figure, Sagittal field curvature line (S line), meridianal curvature of field line (T line) are although not exclusively overlap, but for the image space of Φ 136mm, such astigmatism value has been well, and their biography letter value is all higher, the one-tenth image contrast describing optical system is very high, and the stereovision of imaging is clearly demarcated.Fig. 4 embodiment of the present invention spherical aberration curve map, by suitable out of focus, the spherical aberration in aperture edge and 0.28 band aperture obtains good correction, and have the residual spherical aberration of about 1.4 in 0.77 band aperture, this is completely no problem for this visual system.
Claims (2)
1. 6 times of SLWD object lens, the direction included from the object side to the image side is seen, whole system structure is made up of two large constituent elements (G1, G2), and the first constituent element (G1) has positive focal power, and the second constituent element (G2) has negative focal power; It is characterized in that: described first constituent element (G1) is by the first lens combination (L1), and the second lens combination (L2) and the 3rd lens combination (L3) form, and the first lens combination (L1) and the 3rd lens combination (L3) are arranged in the both sides of the second lens combination (L2); Described second constituent element (G2) is made up of the 4th lens combination (L4);
First lens combination (L1) is a gummed group with positive light coke, and glued together by the first positive lens (L11) and the first negative lens (L12) and form, the first positive lens (L11) adopts bent moon version, concave surface facing object space, and convex surface is cemented surface; First negative lens (L12) adopts bent moon version, convex surface facing image space;
Second lens combination (L2) is only made up of the second positive lens, and the second positive lens is the single-positive-lens of a biconvex, radius-of-curvature less convex surface facing object space, radius-of-curvature larger convex surface facing image space;
3rd lens combination (L3) is a gummed group with positive light coke, is glued together form by the 3rd negative lens (L31) and the 3rd positive lens (L32); 3rd negative lens (L31) adopts bent moon version, and convex surface facing object space, concave surface is cemented surface, and the 3rd positive lens (L32) adopts bent moon version, and convex surface is cemented surface, concave surface facing image space;
4th lens combination (L4) is a gummed group with negative power, is glued together form by the 4th negative lens (L41) and the 4th positive lens (L42); 4th negative lens (L41) adopts double-concave structure form, the concave surface facing object space that radius-of-curvature is larger, and the concave surface that radius-of-curvature is less is cemented surface, and the 4th positive lens (L42) adopts bent moon version, and convex surface is cemented surface, concave surface facing image space;
The focal length of the first constituent element (G1) is fG1, and the focal length of the second constituent element (G2) is fG2, then meet the following conditions between them: 0.98<| fG2/ fG1|<1.35.
2. according to times SLWD object lens of 6 described in claim 1, it is characterized in that: in described first constituent element (G1) each lens combination inner, the focal length of the first lens combination (L1) is fL1, the focal length of the second lens combination (L2) is fL2, the focal length of the 3rd lens combination (L3) is fL3, they meet the following conditions: 119<fL2<135,0.5< fL1/ fL3<0.7; The focal length of the second constituent element (G2) is fG2, and it meets the following conditions :-78< fG2<-70.
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|---|---|---|---|
| CN201310546824.4A CN103558676B (en) | 2013-11-07 | 2013-11-07 | 6 times of SLWD object lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310546824.4A CN103558676B (en) | 2013-11-07 | 2013-11-07 | 6 times of SLWD object lens |
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| CN103558676A CN103558676A (en) | 2014-02-05 |
| CN103558676B true CN103558676B (en) | 2015-08-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106249382B (en) * | 2016-08-26 | 2019-08-09 | 南阳市百施特光电有限公司 | A kind of video is micro-, large visual field optical system of photographing |
| CN106932345B (en) * | 2017-04-14 | 2020-08-18 | 西安交通大学 | Optical Kerr gate gating trajectory optical microscopic imaging system with ultra-long working distance |
| CN108051913A (en) * | 2017-12-28 | 2018-05-18 | 北京凡星光电医疗设备股份有限公司 | A kind of endoscopic system and endoscopic camera optical system integrated design method |
| CN108870211A (en) * | 2018-08-07 | 2018-11-23 | 广州达森灯光股份有限公司 | A kind of Diode laser optical system of single great power LED pattern lamp of fixed-focus |
| CN110716299B (en) * | 2019-11-08 | 2021-02-02 | 山西大学 | Long working distance microobjective with numerical aperture of 0.55 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1725054A (en) * | 2005-07-11 | 2006-01-25 | 中国科学院上海技术物理研究所 | The small-size long working distance micro optical system that use in a kind of suitable space |
| JP4258827B2 (en) * | 2001-09-13 | 2009-04-30 | 株式会社ニコン | Objective lens |
| CN101965533A (en) * | 2008-02-25 | 2011-02-02 | 株式会社尼康 | Object lens |
| CN201965293U (en) * | 2011-02-22 | 2011-09-07 | 大立光电股份有限公司 | Image capturing lens assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3600926B2 (en) * | 1996-03-27 | 2004-12-15 | オリンパス株式会社 | Long working distance microscope objective |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4258827B2 (en) * | 2001-09-13 | 2009-04-30 | 株式会社ニコン | Objective lens |
| CN1725054A (en) * | 2005-07-11 | 2006-01-25 | 中国科学院上海技术物理研究所 | The small-size long working distance micro optical system that use in a kind of suitable space |
| CN101965533A (en) * | 2008-02-25 | 2011-02-02 | 株式会社尼康 | Object lens |
| CN201965293U (en) * | 2011-02-22 | 2011-09-07 | 大立光电股份有限公司 | Image capturing lens assembly |
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