CN103558676A - Six-time over-long working distance objective lens - Google Patents
Six-time over-long working distance objective lens Download PDFInfo
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- CN103558676A CN103558676A CN201310546824.4A CN201310546824A CN103558676A CN 103558676 A CN103558676 A CN 103558676A CN 201310546824 A CN201310546824 A CN 201310546824A CN 103558676 A CN103558676 A CN 103558676A
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Abstract
The invention discloses a six-time over-long working distance objective lens. A whole system is composed of two components, the first component has the positive focal power, the second component has the negative focal power, the first component is composed of three lens sets, the second component is composed of a fourth lens set, the focal length of the first component is fG1, the focal length of the second component is fG2, and the fG1 and the fG2 meet the following condition: 0.98<|fG2/fG1|<1.35. In the lens sets of the first component, the focal length of the first lens set is fL1, the focal length of the second lens set is fL2, the focal length of the third lens set is fL3, and the fL1, the fL2 and the fL3 meet the conditions: 119< fL2<135, and 0.5< fL1/fL3<0.7. The focal length of the second component is fG2, and the fG2 meets the condition: -78< fG2<-70. The six-time over-long working distance objective lens solves the problem that the observation view field of the objective lens is small, the exit pupil diameter is small, and the imaging clearness scope cannot achieve 100%.
Description
Technical field
The present invention relates to optical element technology field, especially a kind of visual optical device that is used for observing the place ahead image that optical system becomes.
Background technology
Large visual 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 observation 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 the microscope of large visual field, 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 that determines microscopical resolution and imaging clearly degree.Object lens are important component parts for optics visual instrument, and its effect is that object is zoomed into first picture, and this first picture further amplifies to obtain larger enlargement factor and carries out visualization through eyepiece again.Traditional as stereomicroscope object lens, biology microscope endoscope objective lens, when using these class 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 all the time observer's eye pupil accurately to aim at the emergent pupil of object lens, otherwise the phenomenon that there will be visual field to be blocked is easy to cause observer's fatigue like this.
Summary of the invention
The object of this invention is to provide a kind of 6 times of SLWD object lens, it can solve, and existing object lens observation visual field is little, and exit pupil diameter is little, and imaging clearly scope is difficult to reach 100% problem.
In order to address the above problem, the technical solution used in the present invention is: this 6 times of SLWD object lens, and the direction including from the object side to the image side sees, whole system structure is comprised of two large constituent elements, the first constituent element has positive focal power, and the second constituent element has negative focal power; Described the first constituent element is by first lens group, and the second lens combination and the 3rd lens combination form, and first lens group (L1) and the 3rd lens combination (L3) are arranged in the both sides of the second lens combination (L2); Described the second constituent element is comprised of the 4th lens combination;
First lens group is a gummed group with positive light coke, by the first positive lens and the first negative lens gummed, is formed, and the first positive lens adopts bent moon version, and concave surface is towards object space, and convex surface is cemented surface; The first negative lens adopts bent moon version, and convex surface is towards image space;
The second lens combination only consists of the second positive lens, and the second positive lens is the single-positive-lens of a biconvex, and the less convex surface of radius-of-curvature is towards object space, and the larger convex surface of radius-of-curvature is towards image space;
The 3rd lens combination is a gummed group with positive light coke, by the 3rd negative lens and the 3rd positive lens gummed, is formed; The 3rd negative lens adopts bent moon version, and convex surface is towards object space, and concave surface is cemented surface, and the 3rd positive lens adopts bent moon version, and convex surface is cemented surface, and concave surface is towards image space;
The 4th lens combination is a gummed group with negative power, by the 4th negative lens and the 4th positive lens gummed, is formed; The 4th negative lens adopts double-concave structure form, and the larger concave surface of radius-of-curvature is towards object space, 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, and concave surface is towards image space;
The focal length of the first constituent element is fG1, and the focal length of the second constituent element is fG2, between them, meets the following conditions: 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 the first constituent element in each lens combination, the focal length of first lens group 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 having adopted 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, together with the spherical reflector in the present invention and tube lens and large visual field microscopic system, use the microscope of formation, when visual field is wide, can take into account clear picture scope and reach 100%, exit pupil diameter is large, observes comfortable, have easy to operate, the characteristic that imaging stereoscopic sensation 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 is the structural representation of the tube lens that is used in conjunction with the present invention.
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 large visual field one of them camera lenses of microscope, have the advantages that operating distance is long, image space is large, the curvature of field is controlled at certain fixed value (about R-420), substantially equates with the spherical radius R value of spherical reflector in system.Direction from the object side to the image side sees, by G1, G2 two, large constituent element forms whole system structure, and the first constituent element G1 has positive focal power, and the second constituent element G2 has negative focal power.The first constituent element G1 is comprised of 3 lens combination, and the second constituent element G2 is comprised of a lens combination.The first constituent element G1 has first lens group L1, the second lens combination L2 and the 3rd lens combination L3; 3 lens combination L1, L2, L3 be take the second lens combination L2 as axis of symmetry is substantially by symmetric form layout, are conducive to like this proofread and correct vertical axial aberration.
First lens group L1 is a gummed group with positive light coke, by the first positive lens L11 and the first negative lens L12 gummed, is formed, and the first positive lens L11 adopts bent moon version, and concave surface is towards object space, and convex surface is cemented surface; And the first negative lens L12 adopts bent moon version, convex surface is towards image space.
The second lens combination L2 is the second positive lens, is the single-positive-lens of a biconvex, and the less convex surface of radius-of-curvature is towards object space, and the larger convex surface of radius-of-curvature is towards image space.
The 3rd lens combination L3 is a gummed group with positive light coke, by the 3rd negative lens L31 and the 3rd positive lens L32 gummed, is formed; The 3rd negative lens L31 adopts bent moon version, and convex surface is towards object space, and concave surface is cemented surface, and the 3rd positive lens L32 adopts bent moon version, and convex surface is cemented surface, and concave surface is towards image space.
The 4th lens combination L4 is a gummed group with negative power, by the 4th negative lens L41 and the 4th positive lens L42 gummed, is formed; The 4th negative lens L41 adopts double-concave structure form, and the larger concave surface of radius-of-curvature is towards object space, and the concave surface that radius-of-curvature is less is cemented surface; The 4th positive lens L42 adopts bent moon version, and convex surface is cemented surface, and concave surface is towards 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, between them, meet the following conditions: 0.98<| f
g2/ f
g1| <1.35.When | f
g1/ f
g2| value be less than at 0.98 o'clock, it is very large that the clear aperture of the first constituent element G1 can become, and for aberration correction will cause structure, becomes very complicated, and the second order spectrum that system can be larger, reduces the optical property of system; When | f
g1/ f
g2| value be greater than at 1.35 o'clock, the object space operating distance of camera lens becomes shorter, can not meet request for utilization.
Each lens combination in the first constituent element G1, the focal length of first lens group 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.First lens group L1 in the 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 because the actual operating conditions of camera lens has departed from desirable symmetry status, so with condition 0.5< f
l1/ f
l3<0.7 retrains these two lens combination L1, L3 and is offset symmetrical degree, 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 to be required to decide by the physical construction of camera lens.
Because the image distance of 6 times of SLWD object lens is infinity, the conjugate distance that is to say it is infinity, and it must use together with tube lens, could final imaging; 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 and characteristic is from left to right 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
Numerical value in above-mentioned table 1 and table 2 form can find out, the R value of each face is quite reasonable, and the face type of eyeglass can be guaranteed well, is conducive to improve the control of 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 the image space for Φ 136mm, such astigmatism value has been well, and their biography letter value is all higher, the one-tenth image contrast that optical system has been described 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, aperture edge and 0.28 spherical aberration with aperture have obtained good correction, 0.77, with aperture, have the residual spherical aberration of 1.4 left and right, and this is completely no problem for this visual system.
Claims (2)
1. 6 times of SLWD object lens, it is characterized in that: the direction including is from the object side to the image side seen, whole system structure is comprised 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; Described the first constituent element (G1) is by first lens group (L1), and the second lens combination (L2) and the 3rd lens combination (L3) form, and first lens group (L1) and the 3rd lens combination (L3) are arranged in the both sides of the second lens combination (L2); Described the second constituent element (G2) is comprised of the 4th lens combination (L4);
First lens group (L1) is a gummed group with positive light coke, by the first positive lens (L11) and the first negative lens (L12) gummed, is formed, and the first positive lens (L11) adopts bent moon version, and concave surface is towards object space, and convex surface is cemented surface; The first negative lens (L12) adopts bent moon version, and convex surface is towards image space;
The second lens combination (L2) only consists of the second positive lens, and the second positive lens is the single-positive-lens of a biconvex, and the less convex surface of radius-of-curvature is towards object space, and the larger convex surface of radius-of-curvature is towards image space;
The 3rd lens combination (L3) is a gummed group with positive light coke, by the 3rd negative lens (L31) and the 3rd positive lens (L32) gummed, is formed; The 3rd negative lens (L31) adopts bent moon version, and convex surface is towards object space, and concave surface is cemented surface, and the 3rd positive lens (L32) adopts bent moon version, and convex surface is cemented surface, and concave surface is towards image space;
The 4th lens combination (L4) is a gummed group with negative power, by the 4th negative lens (L41) and the 4th positive lens (L42) gummed, is formed; The 4th negative lens (L41) adopts double-concave structure form, and the larger concave surface of radius-of-curvature is towards object space, 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, and concave surface is towards 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, between them, meets the following conditions: 0.98<| fG2/ fG1|<1.35.
2. 6 times of SLWD object lens according to claim 1, it is characterized in that: in inner each lens combination of described the first constituent element (G1), the focal length of first lens group (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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|---|---|---|---|
| CN201310546824.4A CN103558676B (en) | 2013-11-07 | 2013-11-07 | 6 times of SLWD object lens |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249382A (en) * | 2016-08-26 | 2016-12-21 | 南阳市百施特光电有限公司 | A kind of video is micro-, photography large visual field optical system |
| CN106932345A (en) * | 2017-04-14 | 2017-07-07 | 西安交通大学 | A kind of light Kerr-gate gating trajectory light micro imaging system of SLWD |
| 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 |
| CN110716299A (en) * | 2019-11-08 | 2020-01-21 | 山西大学 | Long working distance microobjective with numerical aperture of 0.55 |
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| JPH09265044A (en) * | 1996-03-27 | 1997-10-07 | Olympus Optical Co Ltd | Long working distance microscope 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 |
| 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 |
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2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09265044A (en) * | 1996-03-27 | 1997-10-07 | Olympus Optical Co Ltd | Long working distance microscope objective lens |
| 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 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249382A (en) * | 2016-08-26 | 2016-12-21 | 南阳市百施特光电有限公司 | A kind of video is micro-, photography large visual field optical system |
| 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 |
| CN106932345A (en) * | 2017-04-14 | 2017-07-07 | 西安交通大学 | A kind of light Kerr-gate gating trajectory light micro imaging system of SLWD |
| 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 |
| CN110716299A (en) * | 2019-11-08 | 2020-01-21 | 山西大学 | Long working distance microobjective with numerical aperture of 0.55 |
| CN110716299B (en) * | 2019-11-08 | 2021-02-02 | 山西大学 | Long working distance microobjective with numerical aperture of 0.55 |
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| CN103558676B (en) | 2015-08-12 |
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