JP2014089484A - Object lens structure - Google Patents
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- JP2014089484A JP2014089484A JP2014030369A JP2014030369A JP2014089484A JP 2014089484 A JP2014089484 A JP 2014089484A JP 2014030369 A JP2014030369 A JP 2014030369A JP 2014030369 A JP2014030369 A JP 2014030369A JP 2014089484 A JP2014089484 A JP 2014089484A
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- 230000003287 optical effect Effects 0.000 claims description 23
- 238000010276 construction Methods 0.000 claims 1
- 230000005499 meniscus Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
Description
本発明は対物レンズに係り、特に鏡胴内で精度よくレンズ群を固定するための構造に関する。 The present invention relates to an objective lens, and more particularly to a structure for accurately fixing a lens group within a lens barrel.
顕微鏡の対物レンズ等のように高精度のレンズ配置を要する光学系では、個々のレンズ群を中枠と呼ばれる鏡枠に固着させ、この中枠たちを鏡胴内のそれぞれの所定の位置に固定することによって全体の光学系を構成する。 In an optical system that requires high-precision lens placement, such as a microscope objective lens, each lens group is fixed to a lens frame called an inner frame, and these inner frames are fixed at predetermined positions in the lens barrel. By doing so, the entire optical system is configured.
そして、組み立て時の対物レンズの調整は、レンズ群を固着している中枠の位置を鏡胴内で微調整することによって行う。つまり、レンズ群を精度よく中枠に固着することが、鏡胴内で精度よくレンズ群を固定するための基礎となっている。 Adjustment of the objective lens during assembly is performed by finely adjusting the position of the middle frame to which the lens group is fixed in the lens barrel. That is, fixing the lens group to the middle frame with high accuracy is the basis for fixing the lens group with high accuracy in the lens barrel.
レンズ群を中枠に固定するには、レンズ群に含まれるレンズの偏心状態を観察しながら固着する。このとき、そのレンズ群が接合レンズである場合には、まず一枚のレンズを中枠に固着して、その後に残りのレンズを中枠に固着されたレンズに接合していくという手順をとっている。 In order to fix the lens group to the middle frame, the lens group is fixed while observing the eccentric state of the lens included in the lens group. At this time, if the lens group is a cemented lens, first, one lens is fixed to the middle frame, and then the remaining lenses are cemented to the lens fixed to the middle frame. ing.
一般にこの方法では、最初に中枠に固着するレンズは最も像側のレンズであるかあるいは最も物体側のレンズが選択される。つまり、中枠を最下層として積み上げるようにレンズを接合していく。その理由は、組み立てや測定などの作業中に、中枠はレンズ群を支える足となるからである。 In general, in this method, the lens first fixed to the middle frame is the most image side lens or the most object side lens is selected. In other words, the lenses are joined so that the middle frame is stacked as the lowest layer. This is because the middle frame becomes a foot that supports the lens group during operations such as assembly and measurement.
一方で、最初の一枚目のレンズを精度よく固着しなければその誤差が二枚目以降のレンズの位置精度にも影響してしまうので、接合レンズを中枠に固着するには、最初の一枚目のレンズを精度よく固着しなければいけないという要因もある。そのためには、偏心状態が測定しやすいレンズを中枠に固着することが好ましい。 On the other hand, if the first lens is not fixed accurately, the error will affect the positional accuracy of the second and subsequent lenses. There is also a factor that the first lens must be fixed accurately. For this purpose, it is preferable to fix a lens whose eccentricity is easy to measure to the inner frame.
本発明は上記問題を鑑みてなされたものであり、中枠に固着されたレンズ群の偏心を少なくし、精度よく調節可能な対物レンズ構造を提供する。 The present invention has been made in view of the above problems, and provides an objective lens structure that can be adjusted with high accuracy by reducing the eccentricity of a lens group fixed to an inner frame.
本発明の上記課題は、１つ以上の接合レンズ群を含む複数のレンズ群と、前記各レンズ群をそれぞれ固着して保持する複数の中枠と、前記レンズ群が固着されている複数の中枠を内部に積層して保持する鏡胴とを備え、前記接合レンズ群のうち、少なくとも１つの接合レンズ群は、３枚のレンズからなり、レンズの偏心状態を測定しながら中枠に固着されるものであって、先ず、接合レンズ群のうちの１枚目のレンズを中枠に固着して、その後に、２枚目のレンズを前記中枠に固着された前記１枚目のレンズに接合し、さらに残りのレンズを、前記１枚目のレンズの前記２枚目のレンズとの接合面とは反対側の面に接合することで形成され、前記中枠に固着された１枚目のレンズ以外のレンズは中枠に固着されていない接合レンズ群であって、前記中枠への固着は中枠に固着する前記１枚目のレンズの接合面の前記２枚目または前記３枚目のレンズと接合する部分の延長である面或いは延長である面と連続する平面に、中枠の当接突起を当て付けて固着することによって解決される。 The above-described problems of the present invention include a plurality of lens groups including one or more cemented lens groups, a plurality of middle frames for fixing and holding the lens groups, and a plurality of middle frames to which the lens groups are fixed. A lens barrel that holds the frame stacked therein, and at least one of the cemented lens groups is composed of three lenses, and is fixed to the middle frame while measuring the eccentricity of the lens. First, the first lens in the cemented lens group is fixed to the middle frame, and then the second lens is fixed to the first lens fixed to the middle frame. The first lens is formed by bonding, and the remaining lens is bonded to the surface of the first lens opposite to the bonding surface with the second lens, and is fixed to the middle frame. The other lenses are cemented lens groups not fixed to the inner frame. The fixing to the middle frame is continuous with a surface that is an extension or a surface that is an extension of a joint surface of the first lens that is fixed to the middle frame and the second lens or the third lens. The problem is solved by abutting and fixing the contact protrusion of the middle frame to the flat surface.
本発明によれば、中枠に固着されたレンズ群の偏心を少なくし、精度よく調節可能な対物レンズ構造を提供できる。 According to the present invention, it is possible to provide an objective lens structure that can be adjusted with high accuracy by reducing the eccentricity of the lens group fixed to the middle frame.
まず始めに、本発明の技術的特徴について説明する。
本発明の一つの特徴は、接合レンズ群を含む複数のレンズ群と、そのレンズ群の外周部を固着して保持する複数の中枠と、それら中枠を内部に積層して保持する鏡胴とを備える対物レンズにおいて、接合レンズ群における接合面の延長である面の外周部と中枠の当接突起とが当て付けられて固着することである。
First, the technical features of the present invention will be described.
One feature of the present invention is that a plurality of lens groups including a cemented lens group, a plurality of middle frames that fix and hold the outer periphery of the lens group, and a lens barrel that holds the middle frames stacked inside In the objective lens including the above, the outer peripheral portion of the surface which is an extension of the cemented surface in the cemented lens group and the contact protrusion of the middle frame are applied and fixed.
一般に、接合レンズを中枠に固着する際には、最も像側（あるいは物体側）のレンズを像側（あるいは物体側）から当て付けて位置決めする。図１はこのときの中枠とレンズ群の固着の様子を断面図を使って示している。 In general, when the cemented lens is fixed to the middle frame, the lens closest to the image side (or object side) is applied from the image side (or object side) for positioning. FIG. 1 shows a state in which the inner frame and the lens group are fixed using a cross-sectional view.
図１に示される方法では、中枠１はレンズ２を当接突起３によって位置決めしている。このとき、中枠同士の当接面４はレンズ２よりも（図における）下方に張り出した構造を持っている。しかも、当接突起３はレンズ２を（図における）下方から支える構造となっている（当接突起３は接合面側ではない光学面に当て付く）。その理由は当接面４を基準として、レンズ２の偏心を測定するからである。 In the method shown in FIG. 1, the middle frame 1 positions the lens 2 by the contact protrusion 3. At this time, the contact surfaces 4 between the middle frames have a structure projecting downward (in the drawing) from the lens 2. In addition, the contact protrusion 3 has a structure that supports the lens 2 from below (in the drawing) (the contact protrusion 3 abuts on an optical surface that is not on the bonding surface side). This is because the eccentricity of the lens 2 is measured with the contact surface 4 as a reference.
レンズ２の偏心の状態を計測する方法としては球心と呼ばれる位置を測定する。レンズ２において、第一の光学面５の球心は球心位置６であり、第二の光学面７の球心は球心位置８である。この二つの球心位置６、８を測定し、当接面４を基準とした光軸９との離れている度合いをもって、レンズ２の偏心の状態を判断する。 As a method of measuring the eccentric state of the lens 2, a position called a spherical center is measured. In the lens 2, the sphere center of the first optical surface 5 is the sphere center position 6, and the sphere center of the second optical surface 7 is the sphere center position 8. The two ball center positions 6 and 8 are measured, and the eccentric state of the lens 2 is determined based on the degree of separation from the optical axis 9 with the contact surface 4 as a reference.
レンズ２の偏心の状態を計測した結果から、レンズ２の偏心を補正し、その後にレンズ１１とレンズ１２を同様に偏心状態を計測しながら接合していく。
図１に示される例から読み取れるように、レンズ２がメニスカスレンズである場合は球心位置６、８が近い位置になる傾向をもつ。その場合、レンズ２は当接突起３によって保持されているので、レンズ２を中枠の中で微動させても、球心位置８は球心位置６を中心にしか移動しない。その結果、球心位置６、８が近いメニスカスレンズの場合に偏心状態を調節することは難しくなってしまう。
From the result of measuring the eccentric state of the lens 2, the eccentricity of the lens 2 is corrected, and thereafter, the lens 11 and the lens 12 are joined together while measuring the eccentric state.
As can be seen from the example shown in FIG. 1, when the lens 2 is a meniscus lens, the spherical center positions 6 and 8 tend to be close positions. In this case, since the lens 2 is held by the contact protrusion 3, the ball center position 8 moves only around the ball center position 6 even if the lens 2 is slightly moved in the middle frame. As a result, it is difficult to adjust the eccentric state when the meniscus lens is close to the ball center positions 6 and 8.
本発明の実施に係る中枠とレンズ群の固着方法では、敢えて接合面（正確には接合面の延長である面）を中枠に固着することによって、偏心が調節しやすいレンズから固着する。図２は、図１で示された接合レンズと同じものを、本発明の実施に係る構成で中枠に固着したものの断面図である。 In the fixing method of the middle frame and the lens group according to the embodiment of the present invention, the lens is fixed from the lens whose decentration is easily adjusted by fixing the cemented surface (exactly, a surface that is an extension of the cemented surface) to the middle frame. FIG. 2 is a cross-sectional view of the same cemented lens shown in FIG. 1 fixed to the middle frame in the configuration according to the embodiment of the present invention.
図２に示されるように、本発明の実施に係る中枠１３はレンズ１４の接合面を当接突起１５によって位置決めする。このとき、当接突起１５は（図における）上方からレンズ１４を支えるような形状となっているので、偏心状態を計測する基準は中枠同士の当接面１６である。ところが、当接面１６はレンズ１４よりも（図における）下方にあるので、不図示の冶具によって、レンズ１４と測定器が干渉しないようにする。 As shown in FIG. 2, the middle frame 13 according to the embodiment of the present invention positions the joint surface of the lens 14 by the contact protrusion 15. At this time, since the contact protrusion 15 is shaped to support the lens 14 from above (in the drawing), the reference for measuring the eccentric state is the contact surface 16 between the middle frames. However, since the contact surface 16 is below the lens 14 (in the drawing), a jig (not shown) prevents the lens 14 and the measuring instrument from interfering with each other.
図２から読み取れるように、レンズ１４の第一の光学面１７の球心位置１８と、第二の光学面１９の球心位置２０は大きく離れている。よって、この球心位置１８、２０と当接面１６によって定まる光軸２１との差が解り易いという利点がある。さらに、偏心の補正をするためにレンズ１４を中枠１３の中で微動させたときに、球心位置２０が球心位置１８と離れているので、球心位置２０は比較的大きく動く。そのために、レンズ１４の偏心を補正することが容易となる。 As can be seen from FIG. 2, the spherical center position 18 of the first optical surface 17 of the lens 14 and the spherical center position 20 of the second optical surface 19 are greatly separated. Therefore, there is an advantage that the difference between the ball positions 18 and 20 and the optical axis 21 determined by the contact surface 16 can be easily understood. Furthermore, when the lens 14 is finely moved in the middle frame 13 to correct the eccentricity, the ball center position 20 moves away from the ball center position 18, so that the ball center position 20 moves relatively large. Therefore, it becomes easy to correct the eccentricity of the lens 14.
以下では、本発明の一つの特徴である、接合レンズ群における接合面の延長である面の外周部を中枠の当接突起で当て付けて固着する構成に対して、より好ましい状況に関して説明する。 Hereinafter, a more preferable situation will be described with respect to a configuration in which the outer peripheral portion of the surface, which is an extension of the cemented surface in the cemented lens group, which is one feature of the present invention is fixed by being abutted by the contact protrusion of the middle frame. .
まず、中枠の当接突起が当て付けられる接合面の延長である面は凸面であることが好ましい。
一般に、凹面で当て付ける場合には、当接突起が特別な形状をしなければいけない。そのためには加工に手間がかかり好ましくない。また、接合面が凹面である場合は、その延長である面が存在せずに平面となっていることが多い。
First, it is preferable that the surface which is an extension of the joint surface to which the contact protrusion of the middle frame is applied is a convex surface.
Generally, when abutting is applied on the concave surface, the contact protrusion must have a special shape. For this purpose, processing takes time and is not preferable. In addition, when the joint surface is a concave surface, it is often a flat surface without an extended surface.
さらに、中枠の当接突起が当て付けられる接合面の延長である面は凸レンズの光学面であることが好ましい。
一般に、凸レンズは２つの光学面の球心位置が離れている。そのことによって偏心の計測が正確に行える。よって、当接突起が当て付けられる面だけではなく、その反対の光学面も凸面である方がより好ましい。
Furthermore, it is preferable that the surface which is an extension of the joint surface to which the contact protrusion of the middle frame is applied is the optical surface of the convex lens.
In general, the convex lens is such that the positions of the sphere centers of the two optical surfaces are separated. As a result, the eccentricity can be accurately measured. Therefore, it is more preferable that not only the surface to which the contact protrusion is applied, but also the opposite optical surface is a convex surface.
さらに、中枠の当接突起が当て付けられる接合面の延長である面は３枚接合レンズの中央のレンズの光学面であることが好ましい。
３枚接合レンズを中枠に固定する場合に、最も像側（あるいは物体側）から順に接合していく場合には、偏心の誤差が累積してしまうという問題がある。本発明のように、３枚接合レンズの中央のレンズを最初に中枠に固着する構成では、偏心の誤差が積み重なるようなことはないので好ましい。
Furthermore, it is preferable that the surface which is an extension of the cemented surface to which the contact projection of the middle frame is applied is the optical surface of the center lens of the three-lens cemented lens.
When the three-lens cemented lens is fixed to the middle frame, there is a problem in that decentering errors accumulate when sequentially cemented from the most image side (or object side). As in the present invention, a configuration in which the central lens of the three-piece cemented lens is first fixed to the middle frame is preferable because there is no accumulation of eccentricity errors.
さらに、中枠の当接突起が当て付けられる接合面の延長である面は、３枚接合レンズにある２つの接合面のうち、光線高が低い方の接合面であることが好ましい。
３枚接合レンズには接合面が２つある。このときには、光線高が低い方の接合面である方が、接合面の延長である領域が大きく利用できる。
Furthermore, it is preferable that the surface which is an extension of the joint surface to which the contact protrusion of the middle frame is applied is a joint surface having a lower ray height among the two joint surfaces of the three-joint lens.
The three cemented lens has two cemented surfaces. At this time, a region having an extension of the joint surface can be used more greatly when the joint surface has a lower ray height.
また、中枠の当接突起が当て付けられる接合面は、レンズ外径が１割以上異なるレンズ同士の接合面であることが好ましい。
接合面の延長部分に中枠を固着する場合は、接合するレンズ同士の外径に差がある方が、当接突起部を当て付く領域が大きく取れる。
Moreover, it is preferable that the joint surface to which the contact protrusion of the middle frame is applied is a joint surface between lenses having lens outer diameters different by 10% or more.
When the middle frame is fixed to the extended portion of the joint surface, the area where the contact projection is applied is larger when the outer diameters of the lenses to be joined are different.
また、中枠の当接突起が当て付けられる接合面をもつ接合レンズ群は、入射端の光線高と出射端の光線高が１割以上異なる接合レンズ群であることが好ましい。
一般に、レンズ外径は光線高によって決まってくる。つまり、レンズ外径に差が出来る接合レンズは、入射端の光線高と出射端の光線高が異なっている場合である。
Moreover, it is preferable that the cemented lens group having a cemented surface to which the contact protrusion of the middle frame is applied is a cemented lens group in which the light ray height at the incident end and the light ray height at the output end are different by 10% or more.
In general, the lens outer diameter is determined by the height of the light beam. In other words, a cemented lens capable of making a difference in lens outer diameter is a case where the ray height at the incident end is different from the ray height at the exit end.
また、中枠の当接突起が当て付けられる接合面をもつ接合レンズ群は、互いに凹面を向かい合わせた２つのレンズ群の一方であることが好ましい。
顕微鏡をはじめとして、多くの光学系では凹面を向かい合わせた光学面で光線高を絞る構成をとる。その目的は像面湾曲などの収差を補正するためである。そして、この凹面を向かい合わせた構成の前後は、光線高が大きく変化するので、中枠の当接突起が当て付けるための領域を確保しやすい。
Moreover, it is preferable that the cemented lens group having a cemented surface to which the contact projection of the middle frame is applied is one of two lens groups having concave surfaces facing each other.
Many optical systems, such as microscopes, have a configuration in which the light height is reduced by an optical surface with concave surfaces facing each other. The purpose is to correct aberrations such as field curvature. And since the height of the light beam greatly changes before and after the configuration in which the concave surfaces face each other, it is easy to secure an area for the contact projection of the middle frame to abut.
また、中枠の当接突起が当て付けられる接合面を持つ接合レンズ群は、移動群であることが好ましい。
移動群の近傍には、移動を適切に制御するためにカムやバネなどの部品が配置される。そのために、移動群の近傍では中枠の配置も限定されてしまう。この様な状況にも、接合面で中枠の当接突起と当て付けて固着する構成によって、中枠の大きさを小さく抑えることが可能である。
Moreover, it is preferable that the cemented lens group having the cemented surface to which the contact protrusion of the middle frame is applied is a moving group.
In the vicinity of the moving group, components such as a cam and a spring are arranged in order to appropriately control the movement. For this reason, the arrangement of the middle frame is also limited in the vicinity of the moving group. Even in such a situation, it is possible to keep the size of the middle frame small by using a configuration in which the joint surface abuts against the abutment protrusion of the middle frame and is fixed.
以下、本発明の実施例を説明する。 Examples of the present invention will be described below.
図３は本発明の実施による顕微鏡の対物レンズの断面を示したものである。同図に示されるように、本実施例の対物レンズのレンズ群２２ａ、２２ｂ、２２ｃ、２２ｄ、２２ｅ、２２ｆは、各レンズ群の外周部を中枠２３ａ、２３ｂ、２３ｃ、２３ｄ、２３ｅ、２３ｆによって固着し、さらに中枠２３ａ、２３ｂ、２３ｃ、２３ｄ、２３ｅ、２３ｆが鏡胴２４の内部に積層して保持されている。このとき、中枠２３ａ、２３ｂ、２３ｃ、２３ｄ、２３ｅ、２３ｆは鏡胴２４の中に確実に固定されるために、押さえ環２５によって対物レンズの胴付き側からトルクを掛けられ固定している。 FIG. 3 shows a cross section of an objective lens of a microscope according to the present invention. As shown in the figure, the lens groups 22a, 22b, 22c, 22d, 22e, and 22f of the objective lens according to the present embodiment have the outer peripheral portions of the respective lens groups as middle frames 23a, 23b, 23c, 23d, 23e, and 23f. Further, the middle frames 23a, 23b, 23c, 23d, 23e, and 23f are stacked and held inside the lens barrel 24. At this time, the middle frames 23a, 23b, 23c, 23d, 23e, and 23f are fixed by being applied with torque from the body side of the objective lens by the holding ring 25 in order to be securely fixed in the lens barrel 24. .
本実施例において、レンズ群２２ｅは接合面の延長である面の外周部と、中枠２３ｅの当接突起２６とが当てつけられて固着されている。このとき、レンズ群２２ｅは３枚接合の接合レンズであり、中枠２３ｅの当接突起２６に当て付けられている面は中央の凸レンズである。 In the present embodiment, the lens group 22e is fixed by abutting the outer peripheral portion of the surface, which is an extension of the cemented surface, with the contact protrusion 26 of the middle frame 23e. At this time, the lens group 22e is a cemented lens having three lenses, and the surface applied to the contact protrusion 26 of the middle frame 23e is a central convex lens.
このレンズ群２２ｅはレンズ群２２ｆと合わせて、いわゆるガウスタイプのレンズ構成をしている。すなわち、レンズ群２２ｅとレンズ群２２ｆは互いに凹面を向かい合わせて、この部分で光線高が低く絞られている。つまり、レンズ群２２ｅは入射端の光線高と出射端の光線高が大きく変化することが解る。このことは、レンズ群２２ｅにおいて入射側のレンズ外径と出射側のレンズ外径が大きく異なることからも読み取ることができる。 This lens group 22e, together with the lens group 22f, has a so-called Gaussian lens configuration. In other words, the lens group 22e and the lens group 22f face each other with their concave surfaces facing each other, and the height of the light beam is reduced at this portion. That is, it can be seen that the lens group 22e has a large change in the height of light at the incident end and the height of light at the output end. This can also be read from the fact that the lens outer diameter on the entrance side and the lens outer diameter on the exit side are significantly different in the lens group 22e.
さらに、レンズ群２２ｅにおいて、中枠２３ｅの当接突起２６が当て付けられて固着する接合レンズ群における接合面は、３枚接合レンズにある２つの接合面のうち、光線高が低い方の接合面である。 Further, in the lens group 22e, the cemented surface in the cemented lens group to which the contact projection 26 of the middle frame 23e is applied and fixed is a cemented surface having a lower light beam height of the two cemented surfaces of the three cemented lens. Surface.
図４は２枚接合レンズ群と中枠との固着に関する実施例を示している。
図４（ａ）は凸レンズ２７ａと凹レンズ２７ｂの２枚接合レンズを中枠２８ａに固着した例を示している。中枠２８ａの当接突起は、凸レンズ２７ａと凹レンズ２７ｂの接合面の延長である凸面（凸レンズ２７ａ）に当て付いている。
FIG. 4 shows an embodiment relating to the fixation between the two-piece cemented lens group and the middle frame.
FIG. 4A shows an example in which two cemented lenses of a convex lens 27a and a concave lens 27b are fixed to the middle frame 28a. The contact protrusion of the middle frame 28a is in contact with a convex surface (convex lens 27a) that is an extension of the joint surface of the convex lens 27a and the concave lens 27b.
図４（ｂ）はメニスカスレンズ２７ｃとメニスカスレンズ２７ｄの２枚接合レンズを中枠２８ｂに固着した例を示している。中枠２８ｂの当接突起は、メニスカスレンズ２７ｃとメニスカスレンズ２７ｄの接合面の延長である凹面（メニスカスレンズ２７ｃ）に当て付いている。 FIG. 4B shows an example in which two cemented lenses of a meniscus lens 27c and a meniscus lens 27d are fixed to the middle frame 28b. The contact protrusion of the middle frame 28b is in contact with a concave surface (meniscus lens 27c) that is an extension of the joint surface between the meniscus lens 27c and the meniscus lens 27d.
図４（ｃ）はメニスカスレンズ２７ｅと凸レンズ２７ｆの２枚接合レンズを中枠２８ｃに固着した例を示している。中枠２８ｃの当接突起は、メニスカスレンズ２７ｅと凸レンズ２７ｆの接合面の延長である平面（メニスカスレンズ２７ｅ）に当て付いている。 FIG. 4C shows an example in which two cemented lenses of a meniscus lens 27e and a convex lens 27f are fixed to the middle frame 28c. The contact protrusion of the middle frame 28c is in contact with a flat surface (meniscus lens 27e) that is an extension of the joint surface between the meniscus lens 27e and the convex lens 27f.
図５は３枚接合レンズ群と中枠との固着に関する実施例を示している。
図５（ａ）は凸レンズ２９ａと凹レンズ２９ｂと凸レンズ２９ｃの３枚接合レンズを中枠３０ａに固着した例を示している。中枠３０ａの当接突起は、凸レンズ２９ａと凹レンズ２９ｂの接合面の延長である平面（凸レンズ２９ｂ）に当て付いている。
FIG. 5 shows an embodiment relating to the fixation of the three-piece cemented lens group and the middle frame.
FIG. 5A shows an example in which a three-piece cemented lens of a convex lens 29a, a concave lens 29b, and a convex lens 29c is fixed to the middle frame 30a. The contact protrusion of the middle frame 30a is in contact with a flat surface (convex lens 29b) that is an extension of the joint surface of the convex lens 29a and the concave lens 29b.
図５（ｂ）はメニスカスレンズ２９ｄと凸レンズ２９ｅと凹レンズ２９ｆの３枚接合レンズを中枠３０ｂに固着した例を示している。中枠３０ｂの当接突起は、凸レンズ２９ｅと凹レンズ２９ｆの接合面の延長である凸面（凸レンズ２９ｅ）に当て付いている。 FIG. 5B shows an example in which a three-piece cemented lens of a meniscus lens 29d, a convex lens 29e, and a concave lens 29f is fixed to the middle frame 30b. The contact protrusion of the middle frame 30b is in contact with a convex surface (convex lens 29e) that is an extension of the joint surface between the convex lens 29e and the concave lens 29f.
図６は移動群と中枠との固着に関する実施例を示している。
図６（ａ）はメニスカスレンズ３１ａと凸レンズ３１ｂと凹レンズ３１ｃの３枚接合レンズを中枠３２ａに固着した例を示している。中枠３２ａは、カムピン３３ａを備え、不図示のカムに咬み合わされ、カムの回転によって移動群を動かす。中枠３２ａの当接突起は、メニスカスレンズ３１ａと凸レンズ３１ｂの接合面の延長である平面（メニスカスレンズ３１ａ）に当て付いている。
FIG. 6 shows an embodiment relating to the fixation of the moving group and the middle frame.
FIG. 6A shows an example in which a three-piece cemented lens of a meniscus lens 31a, a convex lens 31b, and a concave lens 31c is fixed to the middle frame 32a. The middle frame 32a includes a cam pin 33a, is engaged with a cam (not shown), and moves the moving group by the rotation of the cam. The contact protrusion of the middle frame 32a is in contact with a flat surface (meniscus lens 31a) that is an extension of the joint surface between the meniscus lens 31a and the convex lens 31b.
図６（ｂ）は凹レンズ３１ｄと凸レンズ３１ｅの２枚接合レンズを中枠３２ｂに固着した例を示している。中枠３２ｂは、カムピン３３ｂを備え、不図示のカムに咬み合わされ、カムの回転によって移動群を動かす。中枠３２ｂの当接突起は、凹レンズ３１ｄと凸レンズ３１ｅの接合面の延長である凸面（凸レンズ３１ｅ）に当て付いている。 FIG. 6B shows an example in which two cemented lenses of a concave lens 31d and a convex lens 31e are fixed to the middle frame 32b. The middle frame 32b includes a cam pin 33b, is engaged with a cam (not shown), and moves the moving group by rotation of the cam. The contact protrusion of the middle frame 32b is in contact with a convex surface (convex lens 31e) that is an extension of the joint surface of the concave lens 31d and the convex lens 31e.
１・・・中枠
２・・・レンズ
３・・・当接突起
４・・・当接面
５・・・第一の光学面
６・・・球心位置
７・・・第二の光学面
８・・・球心位置
９・・・光軸
１１・・・レンズ
１２・・・レンズ
１３・・・中枠
１４・・・レンズ
１５・・・当接突起
１６・・・当接面
１７・・・第一の光学面
１８・・・球心位置
１９・・・第二の光学面
２０・・・球心位置
２１・・・光軸
２２・・・レンズ群
２３・・・中枠
２４・・・鏡胴
２５・・・押さえ環
２６・・・当接突起
２７・・・レンズ
２８・・・中枠
２９・・・レンズ
３０・・・中枠
３１・・・レンズ
３２・・・中枠
３３・・・カムピン
DESCRIPTION OF SYMBOLS 1 ... Middle frame 2 ... Lens 3 ... Contact protrusion 4 ... Contact surface 5 ... 1st optical surface 6 ... Ball center position 7 ... 2nd optical surface 8 ... Ball center position 9 ... Optical axis 11 ... Lens 12 ... Lens 13 ... Middle frame 14 ... Lens 15 ... Contact projection 16 ... Contact surface 17 ··· First optical surface 18 ··· Ball position 19 ··· Second optical surface 20 · · · Ball center location 21 ··· Optical axis 22 · · · Lens group 23 · · · Middle frame 24 · · · ..Temperature 25 ... Presser ring 26 ... Contact projection 27 ... Lens 28 ... Medium frame 29 ... Lens 30 ... Medium frame 31 ... Lens 32 ... Medium frame 33 ... Cam pin
Claims (9)
前記各レンズ群をそれぞれ固着して保持する複数の中枠と、
前記レンズ群が固着されている複数の中枠を内部に積層して保持する鏡胴とを備え、
前記接合レンズ群のうち、少なくとも１つの接合レンズ群は、３枚のレンズからなり、レンズの偏心状態を測定しながら中枠に固着されるものであって、先ず、接合レンズ群のうちの１枚目のレンズを中枠に固着して、その後に、２枚目のレンズを前記中枠に固着された前記１枚目のレンズに接合し、さらに残りのレンズを、前記１枚目のレンズの前記２枚目のレンズとの接合面とは反対側の面に接合することで形成され、前記中枠に固着された１枚目のレンズ以外のレンズは中枠に固着されていない接合レンズ群であって、
前記中枠への固着は中枠に固着する前記１枚目のレンズの接合面の前記２枚目または前記３枚目のレンズと接合する部分の延長である面或いは延長である面と連続する平面に、中枠の当接突起を当て付けて固着することを特徴とする顕微鏡の対物レンズ構造。 A plurality of lens groups including one or more cemented lens groups;
A plurality of inner frames for fixing and holding each lens group;
A lens barrel that holds and stacks a plurality of inner frames to which the lens group is fixed;
Of the cemented lens group, at least one cemented lens group is composed of three lenses, and is fixed to the middle frame while measuring the eccentric state of the lens. The first lens is fixed to the middle frame, and then the second lens is bonded to the first lens fixed to the middle frame, and the remaining lenses are joined to the first lens. The lens other than the first lens fixed to the inner frame is formed by being bonded to the surface opposite to the bonding surface with the second lens, and is not bonded to the inner frame. A group,
The fixing to the middle frame is continuous with a surface that is an extension or a surface that is an extension of a joint surface of the first lens that is fixed to the middle frame and the second lens or the third lens. An objective lens structure for a microscope, characterized in that a contact projection of an intermediate frame is applied to a flat surface and fixed.
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| JP2018005232A (en) * | 2016-06-30 | 2018-01-11 | イェノプティック オプティカル システムズ ゲーエムベーハー | Objective lens having at least first and second optical assemblies |
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| JP2001278642A (en) * | 2000-03-31 | 2001-10-10 | Olympus Optical Co Ltd | Joined optical element, holding device thereof and method of assembling joined optical element |
| JP2004233697A (en) * | 2003-01-30 | 2004-08-19 | Olympus Corp | Lens frame device |
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| JPH08234070A (en) * | 1995-02-28 | 1996-09-13 | Konica Corp | Lens device |
| JP2001278642A (en) * | 2000-03-31 | 2001-10-10 | Olympus Optical Co Ltd | Joined optical element, holding device thereof and method of assembling joined optical element |
| JP2004233697A (en) * | 2003-01-30 | 2004-08-19 | Olympus Corp | Lens frame device |
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| JP2018005232A (en) * | 2016-06-30 | 2018-01-11 | イェノプティック オプティカル システムズ ゲーエムベーハー | Objective lens having at least first and second optical assemblies |
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