JP2007121338A - Immersion objective lens system for microscope - Google Patents
Immersion objective lens system for microscope Download PDFInfo
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- JP2007121338A JP2007121338A JP2005309180A JP2005309180A JP2007121338A JP 2007121338 A JP2007121338 A JP 2007121338A JP 2005309180 A JP2005309180 A JP 2005309180A JP 2005309180 A JP2005309180 A JP 2005309180A JP 2007121338 A JP2007121338 A JP 2007121338A
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- 238000007654 immersion Methods 0.000 title claims abstract description 10
- 230000005499 meniscus Effects 0.000 claims abstract description 21
- 230000004075 alteration Effects 0.000 abstract description 33
- 239000006059 cover glass Substances 0.000 abstract description 13
- 239000002131 composite material Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 5
- 206010010071 Coma Diseases 0.000 description 3
- 238000000492 total internal reflection fluorescence microscopy Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000012472 biological sample Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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Abstract
Description
本発明は顕微鏡対物レンズに関するもので、特に、NAが1.46を超えるような高開口数を有し、アポクロマートの性能を持つ液浸系顕微鏡対物レンズに関するものである。 The present invention relates to a microscope objective lens, and more particularly to an immersion microscope objective lens having a high numerical aperture such that NA exceeds 1.46 and having apochromatic performance.
近年、生物学の分野で、全反射型蛍光顕微鏡法( Toatal Internal Reflection Fluorescence Microscopy:以下、TIRFMと称する)を用いて生体細胞内の運動や活性の観察が行なわれている。このTIRFMでの観察の場合、照明光をカバーガラスと試料との境界面にて全反射させる必要があるため、生体試料面にて全反射させ得るような、大きな開口数(NA)の対物レンズを使用する必要がある。 In recent years, in the field of biology, movement and activity in living cells have been observed using total internal reflection fluorescence microscopy (hereinafter referred to as TIRFM). In the case of observation with this TIRFM, since it is necessary to totally reflect the illumination light at the boundary surface between the cover glass and the sample, an objective lens having a large numerical aperture (NA) that can be totally reflected on the biological sample surface Need to use.
更に、前記観察方法で、バックグランドノイズの少ない観察を行なうためには、エバネッセント光の染み出しの深さを小さくしたいという要求がある。 Furthermore, in order to perform observation with little background noise by the observation method, there is a demand for reducing the depth of evanescent light penetration.
このような要求を満足するためには、対物レンズのNAをより大きくすることが望まれ、NAが1.4を超える対物レンズが望まれている。 In order to satisfy such a requirement, it is desired to increase the NA of the objective lens, and an objective lens having an NA exceeding 1.4 is desired.
このような、開口数NAが1.4を超える対物レンズの従来例として下記文献に記載されている対物レンズが知られている。
また、特許文献2に記載されている対物レンズは、屈折率ndが1.80711のオイルと、屈折率ndが1.804のカバーガラスを用い、倍率が100×で、開口数NAが1.65〜0.67の対物レンズである。
The objective lens described in
また、特許文献3に記載されている対物レンズは、倍率が60×で、開口数NAが1.45の対物レンズおよび倍率が100×で開口数NAが1.45〜1.46である。
The objective lens described in
また、特許文献4、6に記載されている対物レンズは、倍率が100×で、開口数NAが1.45である。
The objective lenses described in
更に、特許文献7に記載されている対物レンズは、倍率が55.9×や59.6×で、開口数NAが1.4の対物レンズである。
Furthermore, the objective lens described in
以上のように、特許文献1、2、5に記載されている従来の対物レンズは、いずれも高い屈折率の特殊なオイルやカバーガラスを使用する。
As described above, all of the conventional objective lenses described in
このような、特殊なオイルやカバーガラスは、入手や価格や使い勝手の点で問題がある。 Such special oils and cover glasses have problems in terms of availability, price, and usability.
また、特許文献3.4.6に記載されている従来の対物レンズは、開口数NAが最大で1.46であって、十分大であるとはいえない。 Further, the conventional objective lens described in Patent Document 3.4.6 has a numerical aperture NA of 1.46 at the maximum, and cannot be said to be sufficiently large.
更に、特許文献7に記載されている対物レンズは、観察NAが1.4であり、照明光に使用できるNAであっても1.46であって、十分大きなNAとはいえない。
Furthermore, the objective lens described in
このように、上記文献の従来例は、いずれも、前記の要求を満たすものとはいえない。 Thus, none of the conventional examples of the above documents satisfy the above requirements.
本発明は、前記課題を解決するためになされたもので、特殊なオイルやカバーガラスを用いることなしに開口数NAが1.46を超える高開口数であって、球面収差、色収差が良好に補正されたアポクロマート液浸系顕微鏡対物レンズを提供するものである。 The present invention has been made to solve the above problems, and has a high numerical aperture NA exceeding 1.46 without using special oil or cover glass, and has good spherical aberration and chromatic aberration. A corrected apochromat immersion microscope objective lens is provided.
本発明の顕微鏡対物レンズは、物体側より順に、物体側に平面を向けた平凸レンズと物体側に凹面を向けたメニスカスレンズとを接合した接合レンズからなる第1レンズ群と、1枚または2枚のレンズからなる第2レンズ群と、少なくとも二つの接合レンズを含む第3レンズ群と、像側に強い凹面を向けた負レンズからなる第4レンズ群と、物体側に凹面を向けたメニスカスレンズを含む第5レンズ群からなり、次の条件(1)を満足するものである。 The microscope objective lens according to the present invention includes, in order from the object side, a first lens group including a cemented lens in which a plano-convex lens having a plane facing the object side and a meniscus lens having a concave surface facing the object side are joined, and one or two lenses A second lens group including a single lens, a third lens group including at least two cemented lenses, a fourth lens group including a negative lens having a strong concave surface facing the image side, and a meniscus having a concave surface facing the object side The fifth lens group including the lens satisfies the following condition (1).
(1) 0.9≦|f12/f|≦1.3
ただし、f12は第1レンズ群と第2レンズ群の合成の焦点距離、fは対物レンズ全系の焦点距離である。
(1) 0.9 ≦ | f12 / f | ≦ 1.3
Here, f12 is a combined focal length of the first lens group and the second lens group, and f is a focal length of the entire objective lens system.
また、本発明の対物レンズは、前記の通りのレンズ構成であり、条件(1)に加えて更に条件(2)、(3)を満足するものである。 The objective lens of the present invention has the lens configuration as described above, and further satisfies the conditions (2) and (3) in addition to the condition (1).
(2) 0.7≦|R12/R13|≦1.4
(3) 0.7≦|R12/f|≦1.3
ただし、R12は第1レンズ群の接合面の曲率半径、R13は第1レンズ群の像側の面の曲率半径である。
(2) 0.7 ≦ | R12 / R13 | ≦ 1.4
(3) 0.7 ≦ | R12 / f | ≦ 1.3
Here, R12 is the radius of curvature of the cemented surface of the first lens group, and R13 is the radius of curvature of the image side surface of the first lens group.
本発明の対物レンズは、第1レンズ群を平凸レンズと物体側に凹面を向けたメニスカスレンズを接合した接合レンズにて構成して接合面を物体側に凹面を向けた面とし、この接合面の負の屈折力によりベッツバール和を補正するようにした。 In the objective lens of the present invention, the first lens group is constituted by a cemented lens in which a plano-convex lens and a meniscus lens having a concave surface facing the object side are cemented, and the cemented surface is a surface with the concave surface facing the object side. The Betzbar sum was corrected by the negative refractive power of.
また、本発明の対物レンズは、高いNAを有するため、第1レンズ群の像側の凸面が半球または半球を少し超える球面とし、これによりこの凸面の曲率が浮遊条件(アプラナティックな条件)を満足するようにして、球面収差やコマ収差が発生するのを抑えるようにしている。 In addition, since the objective lens of the present invention has a high NA, the convex surface on the image side of the first lens group is a hemisphere or a spherical surface that slightly exceeds the hemisphere, so that the curvature of the convex surface is a floating condition (aplanatic condition). Thus, the occurrence of spherical aberration and coma is suppressed.
また、第2レンズ群は、正の屈折力を持ち光線をその発散を小さくして第3レンズ群に導くようにしている。そのため、この第2レンズ群は、1枚または2枚の正の単レンズを有する必要がある。また、これら単レンズは、物体側に凹面を向けたメニスカスレンズまたは物体側の面が平面である平凸レンズ、あるいは両凸レンズとすることが望ましい。 The second lens group has a positive refractive power and guides the light beam to the third lens group with a small divergence. Therefore, this second lens group needs to have one or two positive single lenses. These single lenses are desirably meniscus lenses having a concave surface facing the object side, planoconvex lenses having a plane on the object side, or biconvex lenses.
また、第3レンズ群は、少なくとも二つの接合レンズを含む構成とし、球面収差、色収差を補正するようにしている。本発明の対物レンズのように、高いNAのアポクロマート対物レンズは、この第3レンズ群に3枚接合レンズを用いればより望ましい。 The third lens group includes at least two cemented lenses so as to correct spherical aberration and chromatic aberration. As in the objective lens of the present invention, an apochromatic objective lens having a high NA is more preferable if a three-piece cemented lens is used for the third lens group.
また、第4レンズ群は、像側に強い凹面を向けた負のレンズ成分にて構成した。この負のレンズ成分は、強い負の屈折力を持ち、これにより、ペッツバール和を補正すると共に球面収差、コマ収差も良好に補正し得る。この負のレンズ成分は、色収差を更に良好に補正するために、正レンズと負レンズとを接合した接合レンズにすることが望ましい。 The fourth lens group is composed of a negative lens component with a strong concave surface facing the image side. This negative lens component has a strong negative refractive power, and thereby corrects Petzval sum and can also correct spherical aberration and coma well. The negative lens component is desirably a cemented lens in which a positive lens and a negative lens are cemented in order to further correct chromatic aberration.
更に、第5レンズ群は、物体側に凹面を向けたメニスカス状のレンズ成分を含む構成とした。 Further, the fifth lens group includes a meniscus lens component having a concave surface facing the object side.
この第5レンズ群は、物体側の凹面の負の屈折力により。ペッツバール和を良好に補正すると共に、諸収差を良好に補正している。また、この第5レンズ群に含まれるメニスカス形状のレンズ成分により、対物レンズより射出する光線の光線高や角度を調整する機能を有している。更に、このメニスカス形状のレンズ成分を正レンズと負レンズとを接合した接合レンズとすれば倍率の色収差を補正し得るので望ましい。 This fifth lens group is based on the negative refractive power of the concave surface on the object side. The Petzval sum is corrected well, and various aberrations are corrected well. The meniscus lens component included in the fifth lens group has a function of adjusting the height and angle of the light beam emitted from the objective lens. Furthermore, it is desirable to use a meniscus lens component as a cemented lens in which a positive lens and a negative lens are cemented, because chromatic aberration of magnification can be corrected.
また、本発明の顕微鏡対物レンズは、NAが1.46を超える高開口数にするために、前記条件(1)を満足するようにした。 Further, the microscope objective lens of the present invention satisfies the above condition (1) in order to obtain a high numerical aperture with NA exceeding 1.46.
この条件(1)は、第1レンズ群と第2レンズ群の合成の焦点距離f12を規定するものである。第1レンズ群と第2レンズ群とを合わせた正の屈折力を、従来の対物レンズより強くするためにこの条件(1)を満足するようにした。光線高が高くなれば球面収差や軸上色収差が増大する。そのため本発明の対物レンズは、第1レンズ群と第2レンズ群を合わせた屈折力を強くし、第3レンズ群に入射する光線高を抑え、NAが1.46を超えるような光線であっても球面収差や軸上色収差を良好に補正し得るようにした。 This condition (1) defines the combined focal length f12 of the first lens group and the second lens group. This condition (1) is satisfied in order to make the positive refractive power of the first lens group and the second lens group stronger than those of the conventional objective lens. As the beam height increases, spherical aberration and axial chromatic aberration increase. For this reason, the objective lens of the present invention is a light beam that increases the refractive power of the first lens group and the second lens group, suppresses the height of the light beam incident on the third lens group, and has an NA exceeding 1.46. Even so, spherical aberration and axial chromatic aberration can be corrected well.
|f12/f|の値が、条件(1)の下限値の0.9より小になると第1レンズ群と第2レンズ群のパワーが強くなりすぎ第3レンズ群に入射する光線の光線高が低くなる。その場合、第3レンズ群以降での像面湾曲を補正する目的で光線を上げ下げする余地がなくなり、実質上好ましい範囲まで像面湾曲を補正することが困難になる。 When the value of | f12 / f | is smaller than the lower limit value 0.9 of the condition (1), the power of the first lens group and the second lens group becomes too strong, and the height of the light rays incident on the third lens group Becomes lower. In this case, there is no room for raising and lowering the light beam for the purpose of correcting the curvature of field after the third lens group, and it becomes difficult to correct the curvature of field to a substantially preferable range.
また、|f12/f|の値が、条件(1)の上限値の1.3を超えると、第3レンズ群へ入射する光線高が高くなる。その場合、NAが1.46を超えるような光線の球面収差や軸上収差を良好に補正することができなくなる。 On the other hand, when the value of | f12 / f | exceeds the upper limit of 1.3 of the condition (1), the height of the light incident on the third lens group increases. In that case, it becomes impossible to satisfactorily correct the spherical aberration and the on-axis aberration of a light beam having an NA exceeding 1.46.
なお、文献1〜7に記載されている対物レンズは、いずれも|f12/f|の値が1.4を超える値である。
The objective lenses described in
次に、上記本発明の顕微鏡対物レンズにおいて、条件(1)に加え条件(2)、(3)を満足することが次の理由から望ましい。 Next, in the microscope objective lens of the present invention, it is desirable to satisfy the conditions (2) and (3) in addition to the condition (1) for the following reason.
条件(2)は、第1レンズ群の接合レンズの接合面の曲率半径と像側の面の曲率半径との比を規定するもので、それはNAが大きい光線を捕捉するために必要とする条件であると共に実用的な作動距離を得るために必要な条件である。 Condition (2) defines the ratio between the radius of curvature of the cemented surface of the cemented lens of the first lens group and the radius of curvature of the image-side surface, which is necessary for capturing light having a large NA. This is a necessary condition for obtaining a practical working distance.
|R12/R13|の値が、条件(2)の下限値の0.7よりも小になると、接合面の曲率がきつくなり、その結果、第1面の有効径を確保できなくなり、NAの大きい光線を捕捉できなくなる。 When the value of | R12 / R13 | is smaller than the lower limit of 0.7 of the condition (2), the curvature of the joint surface becomes tight, and as a result, the effective diameter of the first surface cannot be secured, and NA Large rays cannot be captured.
また、|R12/R13|の値が上限値の1.4を超えると、前記の接合レンズの像側の凸面の曲率がきつくなる。その結果、浮遊条件を満足するためには、対物レンズの作動距離を極端に短くせざるを得なくなり、実用的な作動距離を得ることが困難になる。 If the value of | R12 / R13 | exceeds the upper limit of 1.4, the curvature of the convex surface on the image side of the cemented lens becomes tight. As a result, in order to satisfy the floating condition, the working distance of the objective lens has to be extremely shortened, and it becomes difficult to obtain a practical working distance.
また、条件(3)は、第1レンズ群の接合面の曲率半径R12と対物レンズの全系の焦点距離fとの比|R12/f|を規定するもので、諸収差をバランスよく補正するための条件である。 Condition (3) defines a ratio | R12 / f | between the curvature radius R12 of the cemented surface of the first lens group and the focal length f of the entire objective lens system, and corrects various aberrations in a well-balanced manner. It is a condition for.
この条件(3)において、|R12/f|の値が下限値の0.7より小になると、前記接合面の曲率がきつくなり、球面収差、コマ収差が悪化する。また|R12/f|の値が上限値の1.3を超えると前記接合面の曲率が緩くなり、ペッツバール和の補正量が不足し、像面湾曲が悪化する。 In this condition (3), if the value of | R12 / f | is smaller than the lower limit of 0.7, the curvature of the joint surface becomes tight and the spherical aberration and coma aberration deteriorate. On the other hand, if the value of | R12 / f | exceeds the upper limit of 1.3, the curvature of the joint surface becomes loose, the Petzval sum correction amount is insufficient, and the curvature of field deteriorates.
本発明は、特殊なオイルやカバーガラスを使用せず標準的なオイルやカバーガラスを使用しても、NAが1.46を超える高開口数で、球面収差、色収差等の諸収差が良好に補正された高開口数のアポクロマート液浸系顕微鏡対物レンズを実現し得るという効果を有する。 In the present invention, even if standard oil or cover glass is used without using special oil or cover glass, various aberrations such as spherical aberration and chromatic aberration are excellent with NA having a high numerical aperture exceeding 1.46. This has the effect of realizing a corrected high numerical aperture apochromatic immersion microscope objective lens.
次に本発明の実施の形態を各実施例にもとづいて説明する。 Next, an embodiment of the present invention will be described based on each example.
本発明の実施例1の液浸系顕微鏡対物レンズは、図1に示す通りの構成であって、下記データを有するレンズ系である。
倍率60×、NA1.48、視野数22、WD0.15
R12=r2=−2.6547
R13=r3=−2.5373
f=3
f12=3.03
f1=3.65
f2=17.27
f3=15.39
f4=−32.62
f5=−49.87
|f12/f|=1.01 条件(1)
|R12/R13|=|r2/r3|=1.05 条件(2)
|R12/f|=|r2/f|=0.88 条件(3)
番号 r d nd νd
1 INF 0.8000 1.51633 64.14 L1
2 -2.6547 2.4984 1.88300 40.76 L2
3 -2.5373 0.1000
4 47.6732 1.8000 1.88300 40.76 L3
5 -22.0319 0.2000
6 12.2714 5.9531 1.49700 81.54 L4
7 -7.0761 1.0000 1.73800 32.26 L5
8 21.2676 5.4885 1.43875 94.93 L6
9 -8.8207 0.2000
10 21.2722 1.0000 1.61336 44.49 L7
11 12.9696 5.7718 1.43875 94.93 L8
12 -7.3922 1.0000 1.77250 49.60 L9
13 -29.9163 0.2000
14 15.5341 3.1803 1.43875 94.93 L10
15 -28.1567 0.6000
16 9.2626 4.7832 1.60300 65.44 L11
17 -9.5374 1.0000 1.67300 38.15 L12
18 5.7707 4.6044
19 -5.2804 5.1425 1.60300 65.44 L13
20 14.9668 3.2178 1.71736 29.52 L14
21 -13.3762
なおデータ中の「番号」はレンズ系において物体側(標本側)より順に付した番号であり、またr,d,nd,νdは曲率半径、面間隔(レンズの肉厚および空気間隔)、d線の屈折率、d線におけるアッベ数、それらはいずれも物体側より順に記載したものである。
The immersion microscope objective lens according to Example 1 of the present invention is configured as shown in FIG. 1 and is a lens system having the following data.
Magnification 60x, NA 1.48, 22 fields of view, WD 0.15
R12 = r 2 = -2.6547
R13 = r 3 = -2.5373
f = 3
f12 = 3.03
f1 = 3.65
f2 = 17.27
f3 = 15.39
f4 = −32.62
f5 = −49.87
| F12 / f | = 1.01 Condition (1)
| R12 / R13 | = |
| R12 / f | = |
Number r d nd νd
1 INF 0.8000 1.51633 64.14 L1
2 -2.6547 2.4984 1.88300 40.76 L2
3 -2.5373 0.1000
4 47.6732 1.8000 1.88300 40.76 L3
5 -22.0319 0.2000
6 12.2714 5.9531 1.49700 81.54 L4
7 -7.0761 1.0000 1.73800 32.26 L5
8 21.2676 5.4885 1.43875 94.93 L6
9 -8.8207 0.2000
10 21.2722 1.0000 1.61336 44.49 L7
11 12.9696 5.7718 1.43875 94.93 L8
12 -7.3922 1.0000 1.77250 49.60 L9
13 -29.9163 0.2000
14 15.5341 3.1803 1.43875 94.93 L10
15 -28.1567 0.6000
16 9.2626 4.7832 1.60300 65.44 L11
17 -9.5374 1.0000 1.67300 38.15 L12
18 5.7707 4.6044
19 -5.2804 5.1425 1.60300 65.44 L13
20 14.9668 3.2178 1.71736 29.52 L14
21 -13.3762
Note that “number” in the data is a number assigned in order from the object side (sample side) in the lens system, and r, d, nd, and νd are curvature radii, surface spacing (lens thickness and air spacing), d. The refractive index of the line and the Abbe number in the d line are all described in order from the object side.
したがって、番号1、2、・・・のr,d,・・・は夫々図における面r1,r2,・・・における局率半径、d1,d2,・・・における面間隔を示し、nd,νdは対応するレンズの屈折率を示す。
Therefore,
本発明の上記実施例1は、図1に示すように、第1レンズ群G1、第2レンズ群G2、第3レンズ群G3、第4レンズ群G4、第5レンズ群G5よりなり、第1レンズ群G1が物体側に凹面を向けた接合面r2を有する接合レンズL1、L2(r1〜r3)よりなり、第2レンズ群G2は、1枚の正レンズL3(r4〜r5)よりなり、第3レンズ群G3は全体として正の屈折力を有し、凸凹凸の3枚接合レンズL4、L5、L6(r6〜r9)と凹凸凹の3枚接合レンズL7、L8、L9(r10〜r13)の二つの3枚接合レンズと正レンズL10(r14〜r15)よりなり、第4レンズ群G4は、全体として正の屈折力を有し、像側に凹面を向けた接合メニスカスレンズL11、L12(r16〜r18)からなり、第5レンズ群は全体として負のパワーを有し、物体側に凹面を向けた接合メニスカスレンズL13、L14(r19〜r21)よりなる。 As shown in FIG. 1, the first embodiment of the present invention includes a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5. The lens group G1 includes cemented lenses L1 and L2 (r 1 to r 3 ) having a cemented surface r 2 with a concave surface facing the object side, and the second lens group G2 includes one positive lens L3 (r 4 to r 5) consists, have a positive refractive power as a third lens group G3 whole, convex irregularities of cemented triplet L4, L5, L6 (r 6 ~r 9) and uneven concave cemented triplet L7, L8, L9 consists (r 10 ~r 13) two three-element cemented lens and the positive lens L10 (r 14 ~r 15) of the fourth lens group G4 has a positive refractive power as a whole, the image side a cemented meniscus lens L11 with a concave surface facing, L12 made (r 16 ~r 18), the fifth lens group as a whole Has a negative power, cemented meniscus lens L13 having a concave surface on the object side, consisting of L14 (r 19 ~r 21).
この実施例1の対物レンズは、データに示すように、条件(1)、(2)、(3)を満足する。 The objective lens of Example 1 satisfies the conditions (1), (2), and (3) as shown in the data.
本発明の実施例2は、図2に示す通りの構成であって、下記データを有する。
倍率60×、NA1.48、視野数22、WD0.15
R12=r2=−3.0948
R13=r3=−2.6321
f=3
f12=3.24
f1=3.92
f2=15.7
f3=15.15
f4=−27.7
f5=−63.69
|f12/f|=1.08 条件(1)
|R12/R13|=|r2/r3|=1.18 条件(2)
|R12/f|=|r2/f|=1.03 条件(3)
番号 r d nd νd
1 INF 0.8000 1.51633 64.14 L1
2 -3.0948 2.6875 1.80400 46.57 L2
3 -2.6321 0.1000
4 INF 1.8000 1.75500 52.32 L3
5 -11.8564 0.2000
6 14.6612 5.8013 1.49700 81.54 L4
7 -6.8647 1.0000 1.67300 38.15 L5
8 63.6424 5.4381 1.43875 94.93 L6
9 -9.5708 0.2000
10 20.1407 1.0000 1.61336 44.49 L7
11 10.7554 6.5836 1.43875 94.93 L8
12 -6.9608 1.0000 1.63775 42.41 L9
13 -38.7752 0.2000
14 16.7280 1.6894 1.43875 94.93 L10
15 -120.5347 0.6000
16 9.7467 4.6630 1.60300 65.44 L11
17 -8.0837 1.0000 1.67300 38.15 L12
18 5.8307 4.6577
19 -5.2834 5.8611 1.60300 65.44 L13
20 16.6902 2.9042 1.73800 32.26 L14
21 -13.4830
本発明の上記実施例2の対物レンズは、図2に示すように、物体側より順に、第1レンズ群G1と、第2レンズ群G2と、第3レンズ群G3と、第4レンズ群G4と、第5レンズ群G5の五つのレンズ群にて構成されている。
The second embodiment of the present invention has a configuration as shown in FIG. 2 and has the following data.
Magnification 60x, NA 1.48, 22 fields of view, WD 0.15
R12 = r 2 = -3.0948
R13 = r 3 = -2.6321
f = 3
f12 = 3.24
f1 = 3.92
f2 = 15.7
f3 = 15.15
f4 = −27.7
f5 = −63.69
| F12 / f | = 1.08 Condition (1)
| R12 / R13 | = |
| R12 / f | = |
Number r d nd νd
1 INF 0.8000 1.51633 64.14 L1
2 -3.0948 2.6875 1.80400 46.57 L2
3 -2.6321 0.1000
4 INF 1.8000 1.75500 52.32 L3
5 -11.8564 0.2000
6 14.6612 5.8013 1.49700 81.54 L4
7 -6.8647 1.0000 1.67300 38.15 L5
8 63.6424 5.4381 1.43875 94.93 L6
9 -9.5708 0.2000
10 20.1407 1.0000 1.61336 44.49 L7
11 10.7554 6.5836 1.43875 94.93 L8
12 -6.9608 1.0000 1.63775 42.41 L9
13 -38.7752 0.2000
14 16.7280 1.6894 1.43875 94.93 L10
15 -120.5347 0.6000
16 9.7467 4.6630 1.60300 65.44 L11
17 -8.0837 1.0000 1.67300 38.15 L12
18 5.8307 4.6577
19 -5.2834 5.8611 1.60300 65.44 L13
20 16.6902 2.9042 1.73800 32.26 L14
21 -13.4830
As shown in FIG. 2, the objective lens according to Example 2 of the present invention, in order from the object side, includes a first lens group G1, a second lens group G2, a third lens group G3, and a fourth lens group G4. And five lens groups of the fifth lens group G5.
そして、第1レンズ群G1は全体として正の屈折力を有し、物体側に凹面を向けた接合面r2を有する平凸接合レンズL1、L2(r1〜r3)よりなり、第2レンズ群G2は、1枚の正レンズL3(r4〜r5)よりなり、第3レンズ群G3は全体として正のパワーを有し、凸凹凸の3枚接合レンズL4、L5、L6(r6〜r9)と凹凸凹の3枚接合レンズL7、L8、L9(r10〜r13)と正レンズL10(r14〜r15)とよりなり、第4レンズ群G4は、全体として負の屈折力を有し、像側に凹面を向けた接合メニスカスレンズL11、L12(r16〜r18)からなり、第5レンズ群G5は全体として負のパワーを有し、物体側に凹面を向けた接合メニスカスレンズL13、L14(r19〜r21)よりなる。
The first lens group G1 has plano-convex cemented lenses L1 and L2 (r 1 to r 3 ) having a positive refractive power as a whole and having a cemented surface r 2 with a concave surface facing the object side. The lens group G2 is composed of one positive lens L3 (r 4 to r 5 ), and the third lens group G3 has a positive power as a whole, and has three convex cemented lenses L4, L5, L6 (r 6 to r 9 ), a concave-convex three-piece cemented
この実施例2も、データ中に示すように、条件(1)、(2)、(3)を満足する。
This Example 2 also satisfies the conditions (1), (2), and (3) as shown in the data.
本発明の実施例3の対物レンズは、図3に示す通りのレンズ構成であって、次のデータを有するレンズ系である。
倍率60×、NA1.48、視野数22、WD0.15
R12=r2=−3.0558
R13=r3=−2.8215
f=3
f12=3.72
f1=4.34
f2=13.45
f3=25.95
f4=−128.53
f5=−44.9
|f12/f|=1.24 条件(1)
|R12/R13|=|r2/r3|=1.08 条件(2)
|R12/f|=|r2/f|=1.02 条件(3)
番号 r d nd νd
1 INF 0.7000 1.51633 64.14 L1
2 -3.0558 3.1300 1.77250 49.60 L2
3 -2.8215 0.1400
4 -14.6318 1.9000 1.56907 71.30 L3
5 -7.3349 0.2000
6 31.2166 4.2475 1.43875 94.93 L4
7 -21.9219 0.1000
8 10.8530 6.3968 1.43875 94.93 L5
9 -14.8866 1.0000 1.67300 38.15 L6
10 12.3589 3.1351 1.43875 94.99 L7
11 -46.6847 0.3000
12 18.3790 1.0000 1.63775 42.41 L8
13 7.1356 5.9316 1.43875 94.99 L9
14 -24.7148 0.2000
15 INF 1.1000 1.67300 38.15 L10
16 12.6163 3.2446 1.43875 94.99 L11
17 -18.7213 0.2000
18 9.0969 5.1442 1.43875 94.99 L12
19 -101.6701 1.0000 1.61336 44.49 L13
20 8.9722 4.0950
21 -4.7658 2.7900 1.60300 65.44 L14
22 13.7835 2.8326 1.73800 32.26 L15
23 -11.2491
即ち、実施例3は、物体側より順に、第1レンズ群G1と、第2レンズ群G2と、第3レンズ群G3と、第4レンズ群G4と、第5レンズ群G5とより構成されている。
The objective lens of Example 3 of the present invention has a lens configuration as shown in FIG. 3 and is a lens system having the following data.
Magnification 60x, NA 1.48, 22 fields of view, WD 0.15
R12 = r 2 = -3.0558
R13 = r 3 = -2.8215
f = 3
f12 = 3.72
f1 = 4.34
f2 = 13.45
f3 = 25.95
f4 = −128.53
f5 = -44.9
| F12 / f | = 1.24 Condition (1)
| R12 / R13 | = |
| R12 / f | = |
Number r d nd νd
1 INF 0.7000 1.51633 64.14 L1
2 -3.0558 3.1300 1.77250 49.60 L2
3 -2.8215 0.1400
4 -14.6318 1.9000 1.56907 71.30 L3
5 -7.3349 0.2000
6 31.2166 4.2475 1.43875 94.93 L4
7 -21.9219 0.1000
8 10.8530 6.3968 1.43875 94.93 L5
9 -14.8866 1.0000 1.67300 38.15 L6
10 12.3589 3.1351 1.43875 94.99 L7
11 -46.6847 0.3000
12 18.3790 1.0000 1.63775 42.41 L8
13 7.1356 5.9316 1.43875 94.99 L9
14 -24.7148 0.2000
15 INF 1.1000 1.67300 38.15 L10
16 12.6163 3.2446 1.43875 94.99 L11
17 -18.7213 0.2000
18 9.0969 5.1442 1.43875 94.99 L12
19 -101.6701 1.0000 1.61336 44.49 L13
20 8.9722 4.0950
21 -4.7658 2.7900 1.60300 65.44 L14
22 13.7835 2.8326 1.73800 32.26 L15
23 -11.2491
In other words, the third exemplary embodiment includes, in order from the object side, the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, and the fifth lens group G5. Yes.
そして、第1レンズ群G1は、物体側に凹面を向けた接合面(r2)を有する平凸接合レンズL1、L2(r1〜r3)よりなり、第2レンズ群G2は、2枚の正レンズL3、L4(r4〜r5、r6〜r7)からなり、第3レンズ群G3は全体として正の屈折力を有しており、凸凹凸の3枚接合レンズL5、L6、L7(r8〜r11)と凹凸の接合レンズL8、L9(r12〜r14)と凹凸の接合レンズL10、L11(r15〜r17)よりなり、第4レンズ群G4は、全体として負の屈折力を有し、像側に凹面を向けた接合メニスカスレンズL12、L13(r18〜r20)からなり、第5レンズ群G5は全体として負の屈折力を有し、物体側に凹面を向けた接合メニスカスレンズL14、L15(r21〜r23)とよりなる。 The first lens group G1 includes plano-convex cemented lenses L1 and L2 (r 1 to r 3 ) having cemented surfaces (r 2 ) with a concave surface facing the object side, and the second lens group G2 includes two lenses. the positive lens L3, L4 (r 4 ~r 5 , r 6 ~r 7) consists, third lens group G3 has a positive refractive power as a whole, three convex irregularities cemented lens L5, L6 consists of L7 (r 8 ~r 11) and unevenness of the cemented lens L8, L9 (r 12 ~r 14 ) and unevenness of the cemented lens L10, L11 (r 15 ~r 17 ), the fourth lens group G4, whole as has negative refractive power, a cemented meniscus lens L12 with a concave surface facing the image side, L13 (r 18 ~r 20) , the fifth lens group G5 has a negative refractive power as a whole, the object side And cemented meniscus lenses L14 and L15 (r 21 to r 23 ) having a concave surface directed to each other.
この実施例3も、データ中に示すように、条件(1)、(2)、(3)を満足する。 This Example 3 also satisfies the conditions (1), (2), and (3) as shown in the data.
本発明の実施例4の対物レンズは、図4に示す通りのレンズ構成であって、下記の通りのデータを有する。
倍率60×、NA1.48、視野数22、WD0.15
R12=r2=−2.3456
R13=r3=−2.407
f=3
f12=2.8
f1=3.5
f2=14.33
f3=15.73
f4=−39.64
f5=−36.9
|f12/f|=0.93 条件(1)
|R12/R13|=|r2/r3|=0.97 条件(2)
|R12/f|=|r2/f|=0.78 条件(3)
番号 r d nd νd
1 INF 0.6800 1.51633 64.14 L1
2 -2.3456 2.4611 1.88300 40.76 L2
3 -2.4070 0.1000
4 26.7849 1.8000 1.88300 40.76 L3
5 -23.2348 0.2000
6 18.8405 5.7745 1.49700 81.54 L4
7 -5.7635 1.0000 1.73800 32.26 L5
8 44.2904 5.4936 1.43875 94.93 L6
9 -8.1486 0.2000
10 33.5309 1.0000 1.61336 44.49 L7
11 13.6060 5.7494 1.43875 94.93 L8
12 -7.6815 1.0000 1.77250 49.60 L9
13 -24.1850 0.2000
14 14.7280 3.1664 1.43875 94.93 L10
15 -30.1450 0.6000
16 8.2907 4.7445 1.60300 65.44 L11
17 -12.0370 1.0000 1.67300 38.15 L12
18 5.3610 4.3186
19 -4.8977 5.8879 1.60300 65.44 L13
20 16.9759 3.1640 1.72825 28.46 L14
21 -14.1543
この実施例例4の対物レンズは、図示するように、第1レンズ群G1と、第2レンズ群G2と、第3レンズ群G3と、第4レンズ群G4と、第5レンズ群G5とより構成されている。
The objective lens of Example 4 of the present invention has the lens configuration as shown in FIG. 4 and has the following data.
Magnification 60x, NA 1.48, 22 fields of view, WD 0.15
R12 = r 2 = -2.3456
R13 = r 3 = -2.407
f = 3
f12 = 2.8
f1 = 3.5
f2 = 14.33
f3 = 15.73
f4 = −39.64
f5 = −36.9
| F12 / f | = 0.93 Condition (1)
| R12 / R13 | = |
| R12 / f | = |
Number r d nd νd
1 INF 0.6800 1.51633 64.14 L1
2 -2.3456 2.4611 1.88300 40.76 L2
3 -2.4070 0.1000
4 26.7849 1.8000 1.88300 40.76 L3
5 -23.2348 0.2000
6 18.8405 5.7745 1.49700 81.54 L4
7 -5.7635 1.0000 1.73800 32.26 L5
8 44.2904 5.4936 1.43875 94.93 L6
9 -8.1486 0.2000
10 33.5309 1.0000 1.61336 44.49 L7
11 13.6060 5.7494 1.43875 94.93 L8
12 -7.6815 1.0000 1.77250 49.60 L9
13 -24.1850 0.2000
14 14.7280 3.1664 1.43875 94.93 L10
15 -30.1450 0.6000
16 8.2907 4.7445 1.60300 65.44 L11
17 -12.0370 1.0000 1.67300 38.15 L12
18 5.3610 4.3186
19 -4.8977 5.8879 1.60300 65.44 L13
20 16.9759 3.1640 1.72825 28.46 L14
21 -14.1543
As shown in the drawing, the objective lens of Example 4 includes a first lens group G1, a second lens group G2, a third lens group G3, a fourth lens group G4, and a fifth lens group G5. It is configured.
そして、第1レンズ群G1は、物体側に凹面を向けた接合面(r2)を有する平凸接合レンズL1、L2(r1〜r3)と、第2レンズ群G2は1枚の正レンズL3(r4〜r5)からなり、第3レンズ群G3は全体として正の屈折力を有するレンズ群で、凸凹凸の3枚接合レンズL4、L5、L6(r6〜r9)と凹凸凹の3枚接合レンズL7、L8、L9(r10〜r13)と正レンズL10(r14〜r15)よりなり、第4レンズ群G4は、全体として負の屈折力を有するレンズ群で、像側に凹面を向けた接合メニスカスレンズL11、L12(r16〜r18)からなり、第5レンズ群G5は全体として負の屈折力を有するレンズ群であって、物体側に凹面を向けた接合メニスカスレンズL13、L14(r19〜r21)とよりなる。
この実施例4の対物レンズも、上記データに示すように、条件(1)、(2)、(3)を満足する。
The first lens group G1 includes plano-convex cemented lenses L1 and L2 (r 1 to r 3 ) having a cemented surface (r 2 ) with a concave surface facing the object side, and the second lens group G2 includes one positive lens. The third lens group G3 is composed of lenses L3 (r 4 to r 5 ), and has a positive refracting power as a whole, and has three convex cemented lenses L4, L5, and L6 (r 6 to r 9 ). uneven concave cemented triplet L7, L8, L9 (r 10 ~r 13) and becomes a positive lens L10 (r 14 ~r 15), the fourth lens group G4 is a lens group having a negative refractive power as a whole in, a cemented meniscus lens L11, L12 having a concave surface facing the image side (r 16 ~r 18), the fifth lens group G5 is a lens group having negative refractive power as a whole, a concave surface on the object side cemented meniscus lens L13 having a becomes more and L14 (r 19 ~r 21).
The objective lens of Example 4 also satisfies the conditions (1), (2), and (3) as shown in the above data.
本発明の実施例5の対物レンズは、図5に示す通りのレンズ構成であって、下記の通りのデータを有するレンズ系である。
倍率60×、NA1.48、視野数22、WD0.15
R12=r2=−3.5871
R13=r3=−2.6944
f=3
f12=3.02
f1=3.68
f2=17.08
f3=13.97
f4=−22.99
f5=−45.58
|f12/f|=1.01 条件(1)
|R12/R13|=|r2/r3|=1.33 条件(2)
|R12/f|=|r2/f|=1.2 条件(3)
番号 r d nd νd
1 INF 0.8000 1.51633 64.14 L1
2 -3.5871 2.5787 1.88300 40.76 L2
3 -2.6944 0.1000
4 21.7926 1.8000 1.88300 40.76 L3
5 -47.1096 0.2000
6 15.9174 5.8105 1.49700 81.54 L4
7 -7.0662 1.0000 1.73800 32.26 L5
8 21.9651 5.5975 1.43875 94.93 L6
9 -9.0082 0.2000
10 17.1629 1.0000 1.61336 44.49 L7
11 14.1749 6.3342 1.43875 94.93 L8
12 -7.7450 1.0000 1.77250 49.60 L9
13 -24.4287 0.2000
14 13.0557 3.7780 1.43875 94.93 L10
15 -57.8878 0.6000
16 8.7883 4.4483 1.60300 65.44 L11
17 -12.4876 1.0000 1.67300 38.15 L12
18 4.8256 3.4411
19 -5.3141 5.1244 1.60300 65.44 L13
20 18.2004 1.8273 1.76182 26.52 L14
21 -32.7452 0.2000
22 68.0322 2.0000 1.71736 29.52 L15
23 -37.0389
この実施例例5の対物レンズは、図5に示す通り、物体側より順に、第1レンズ群G1と、第2レンズ群G2と、第3レンズ群G3と、第4レンズ群G4と、第5レンズ群G5とより構成されている。
The objective lens of Example 5 of the present invention has a lens configuration as shown in FIG. 5 and is a lens system having the following data.
Magnification 60x, NA 1.48, 22 fields of view, WD 0.15
R12 = r 2 = -3.5871
R13 = r 3 = -2.6944
f = 3
f12 = 3.02
f1 = 3.68
f2 = 17.08
f3 = 13.97
f4 = −22.99
f5 = −45.58
| F12 / f | = 1.01 Condition (1)
| R12 / R13 | = |
| R12 / f | = |
Number r d nd νd
1 INF 0.8000 1.51633 64.14 L1
2 -3.5871 2.5787 1.88300 40.76 L2
3 -2.6944 0.1000
4 21.7926 1.8000 1.88300 40.76 L3
5 -47.1096 0.2000
6 15.9174 5.8105 1.49700 81.54 L4
7 -7.0662 1.0000 1.73800 32.26 L5
8 21.9651 5.5975 1.43875 94.93 L6
9 -9.0082 0.2000
10 17.1629 1.0000 1.61336 44.49 L7
11 14.1749 6.3342 1.43875 94.93 L8
12 -7.7450 1.0000 1.77250 49.60 L9
13 -24.4287 0.2000
14 13.0557 3.7780 1.43875 94.93 L10
15 -57.8878 0.6000
16 8.7883 4.4483 1.60300 65.44 L11
17 -12.4876 1.0000 1.67300 38.15 L12
18 4.8256 3.4411
19 -5.3141 5.1244 1.60300 65.44 L13
20 18.2004 1.8273 1.76182 26.52 L14
21 -32.7452 0.2000
22 68.0322 2.0000 1.71736 29.52 L15
23 -37.0389
As shown in FIG. 5, the objective lens of Example 5 includes the first lens group G1, the second lens group G2, the third lens group G3, the fourth lens group G4, and the first lens group in order from the object side. 5 lens group G5.
そして、第1レンズ群G1は、物体側に凹面を向けた接合面(r2)を有する平凸接合レンズL1、L2(r1〜r3)よりなり、第2レンズ群G2は1枚の正レンズL3(r4〜r5)よりなり、第3レンズ群G3は全体として正の屈折力を有するレンズ群であって、凸凹凸の3枚接合レンズL4、L5、L6(r6〜r9)と凹凸凹の3枚接合レンズL7、L8、L9(r10〜r13)と正レンズL10(r14〜r15)とよりなり、第4レンズ群G4は、全体として負の屈折力を有するレンズ群であって、像側に凹面を向けた接合メニスカスレンズL11、L2(r16〜r18)よりなり、第5レンズ群G5は全体として負の屈折力を有し、物体側に凹面を向けた接合メニスカスレンズL13、L14(r19〜r21)と正レンズL15(r22〜r23)よりなる。
この実施例5の対物レンズは、データに示す通り、条件(1)、(2)、(3)を満足する。
The first lens group G1 includes plano-convex cemented lenses L1 and L2 (r 1 to r 3 ) having cemented surfaces (r 2 ) with a concave surface facing the object side, and the second lens group G2 is a single lens. The third lens group G3 includes a positive lens L3 (r 4 to r 5 ), and has a positive refractive power as a whole. The third lens group G3 includes convex and concave three-piece cemented lenses L4, L5, and L6 (r 6 to r 9) an irregular concave cemented triplet L7, L8, L9 and more becomes (r 10 ~r 13) and the positive lens L10 (r 14 ~r 15), the fourth lens group G4 is negative refractive power as a whole a lens group having made a cemented meniscus lens L11 having a concave surface facing the image side, L2 (r 16 ~r 18) , the fifth lens group G5 has a negative refractive power as a whole, on the object side cemented meniscus lens L13 with a concave surface facing, L14 (r 19 ~r 21) and a positive lens L15 r 22 ~r 23) consisting of.
The objective lens of Example 5 satisfies the conditions (1), (2), and (3) as shown in the data.
以上述べた実施例1〜実施例5は、いずれも下記のカバーガラスおよびオイルを用いている。 In each of Examples 1 to 5 described above, the following cover glass and oil are used.
カバーガラス d=0.17mm, nd=1.521, νd=56
オイル nd=1.51548, νd=43.1
また、上記実施例は、いずれも対物レンズからの射出光が平行光束である無限遠設計の対物レンズである。そのため、対物レンズ自体では結像しない。したがって、上記実施例の対物レンズは、例えば図11に示すレンズ構成で、下記データを有する結像レンズと組み合わせて使用する。
番号 r d nd νd
1 68.7541 7.7321 1.48749 70.23
2 -37.5679 3.4742 1.80610 40.92
3 -102.8477 0.6973
4 84.3099 6.0238 1.83400 37.16
5 -50.7100 3.0298 1.64450 40.82
6 40.6619
上記データ中r,d,nd,νdは曲率半径、面間隔、d線の屈折率、d線に対するアッベ数で、対物レンズ側から順に記載してある。
Cover glass d = 0.17 mm, nd = 1.521, νd = 56
Oil nd = 1.515548, νd = 43.1
The above-described embodiments are all objective lenses with an infinite design in which the light emitted from the objective lens is a parallel light flux. Therefore, no image is formed by the objective lens itself. Therefore, the objective lens of the above embodiment is used in combination with an imaging lens having the following data, for example, in the lens configuration shown in FIG.
Number r d nd νd
1 68.7541 7.7321 1.48749 70.23
2 -37.5679 3.4742 1.80610 40.92
3 -102.8477 0.6973
4 84.3099 6.0238 1.83400 37.16
5 -50.7100 3.0298 1.64450 40.82
6 40.6619
In the above data, r, d, nd, and νd are the radius of curvature, the surface spacing, the refractive index of the d-line, and the Abbe number with respect to the d-line, which are described in order from the objective lens side.
この結像レンズの焦点距離は、F=180であり、対物レンズ(各実施例)と組み合わせる際の両レンズ系の間の間隔は、50mm〜170mmの間のいずれかであればよい。 The focal length of this imaging lens is F = 180, and the distance between both lens systems when combined with the objective lens (each example) may be any one between 50 mm and 170 mm.
尚、実施例、結像レンズ等のデータにおける長さの単位はmmである。 Incidentally, the unit of length in the data of the embodiment, the imaging lens and the like is mm.
以上述べた各実施例の結像レンズと組み合わせた時(両者の間隔が120mm)の収差状況は、夫々図6、図7、図8、図9、図10に示す通りである。 The aberration states when combined with the imaging lens of each of the embodiments described above (the distance between the two is 120 mm) are as shown in FIGS. 6, 7, 8, 9, and 10, respectively.
これら収差図6〜10に示すように、いずれの実施例も球面収差、色収差等が良好に補正されている。 As shown in FIGS. 6 to 10, spherical aberration, chromatic aberration, and the like are satisfactorily corrected in all the examples.
本発明の液浸系顕微鏡対物レンズは、特殊なオイルやカバーガラスを使用せずに、標準的なオイルやカバーガラスを使用しても、NAが1.46を超える高開口数で、球面収差、色収差が良好に補正されている。 The immersion microscope objective lens of the present invention has a high numerical aperture of NA exceeding 1.46 and spherical aberration even when standard oil or cover glass is used without using special oil or cover glass. The chromatic aberration is corrected well.
Claims (2)
(1) 0.9≦|f12/f|≦1.3
ただし、f12は第1レンズ群と第2レンズ群の合成の焦点距離、fは対物レンズ全系の焦点距離である。 In order from the object side, a first lens group composed of a cemented lens in which a plano-convex lens having a plane facing the object side and a meniscus lens having a concave surface facing the object side are joined, and a second lens composed of one or two lenses A third lens group including a group, at least two cemented lenses, a fourth lens group including a negative lens having a strong concave surface facing the image side, and a fifth lens group including a meniscus lens having a concave surface facing the object side An immersion microscope objective lens that satisfies the following condition (1).
(1) 0.9 ≦ | f12 / f | ≦ 1.3
Here, f12 is a combined focal length of the first lens group and the second lens group, and f is a focal length of the entire objective lens system.
(2) 0.7≦|R12/R13|≦1.4
(3) 0.7≦|R12/f|≦1.3
ただし、R12は第1レンズ群の接合面の曲率半径、R13は第1レンズ群の像側の面の曲率半径、fは対物レンズ全系の焦点距離である。
The immersion microscope objective lens according to claim 1, wherein the following conditions (2) and (3) are satisfied.
(2) 0.7 ≦ | R12 / R13 | ≦ 1.4
(3) 0.7 ≦ | R12 / f | ≦ 1.3
Where R12 is the radius of curvature of the cemented surface of the first lens group, R13 is the radius of curvature of the image side surface of the first lens group, and f is the focal length of the entire objective lens system.
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Publication number | Priority date | Publication date | Assignee | Title |
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US7486445B2 (en) | 2006-12-11 | 2009-02-03 | Olympus Corporation | Immersion type microscope objective |
JP2009037060A (en) * | 2007-08-02 | 2009-02-19 | Olympus Corp | Liquid immersion microscope objective lens |
JP2010271693A (en) * | 2009-04-21 | 2010-12-02 | Olympus Corp | Immersion microscope objective lens and microscope having the same |
EP2017663A3 (en) * | 2007-07-17 | 2012-07-11 | Olympus Corporation | Immersion microscope objective and laser scanning microscope system using the same |
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US10598911B2 (en) | 2016-10-20 | 2020-03-24 | Olmypus Corporation | Objective |
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US10884229B2 (en) | 2018-04-19 | 2021-01-05 | Olympus Corporation | Immersion microscope objective |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05196875A (en) * | 1991-09-12 | 1993-08-06 | Olympus Optical Co Ltd | Near ultraviolet objective |
JPH07281097A (en) * | 1994-04-13 | 1995-10-27 | Olympus Optical Co Ltd | Liquid immersion system microscope objective lens |
JP2002098903A (en) * | 2000-09-25 | 2002-04-05 | Nikon Corp | Immersion system microscopic objective lens |
JP2002350734A (en) * | 2001-05-23 | 2002-12-04 | Olympus Optical Co Ltd | Liquid immersion system microscopic objective lens |
JP2003015046A (en) * | 2001-06-28 | 2003-01-15 | Nikon Corp | Immersion system microscope objective |
JP2003233012A (en) * | 2003-03-07 | 2003-08-22 | Olympus Optical Co Ltd | Immersion microscope objective lens |
-
2005
- 2005-10-25 JP JP2005309180A patent/JP5165195B2/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05196875A (en) * | 1991-09-12 | 1993-08-06 | Olympus Optical Co Ltd | Near ultraviolet objective |
JPH07281097A (en) * | 1994-04-13 | 1995-10-27 | Olympus Optical Co Ltd | Liquid immersion system microscope objective lens |
JP2002098903A (en) * | 2000-09-25 | 2002-04-05 | Nikon Corp | Immersion system microscopic objective lens |
JP2002350734A (en) * | 2001-05-23 | 2002-12-04 | Olympus Optical Co Ltd | Liquid immersion system microscopic objective lens |
JP2003015046A (en) * | 2001-06-28 | 2003-01-15 | Nikon Corp | Immersion system microscope objective |
JP2003233012A (en) * | 2003-03-07 | 2003-08-22 | Olympus Optical Co Ltd | Immersion microscope objective lens |
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EP2573608A3 (en) * | 2007-07-17 | 2013-04-17 | Olympus Corporation | Immersion microscope objective and laser scanning microscope system using the same |
EP2573609A3 (en) * | 2007-07-17 | 2013-04-17 | Olympus Corporation | Immersion microscope objective and laser scanning microscope system using the same |
US8508856B2 (en) | 2007-07-17 | 2013-08-13 | Olympus Corporation | Immersion microscope objective and laser scanning microscope system using same |
US8576482B2 (en) | 2007-07-17 | 2013-11-05 | Olympus Corporation | Laser scanning microscope system |
JP2009037060A (en) * | 2007-08-02 | 2009-02-19 | Olympus Corp | Liquid immersion microscope objective lens |
JP2010271693A (en) * | 2009-04-21 | 2010-12-02 | Olympus Corp | Immersion microscope objective lens and microscope having the same |
US10324269B2 (en) | 2016-10-20 | 2019-06-18 | Olympus Corporation | Immersion objective |
JP2018066913A (en) * | 2016-10-20 | 2018-04-26 | オリンパス株式会社 | Immersion objective lens |
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