JP6993861B2 - Holding devices, optics, and methods of manufacturing optics - Google Patents

Holding devices, optics, and methods of manufacturing optics Download PDF

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JP6993861B2
JP6993861B2 JP2017238924A JP2017238924A JP6993861B2 JP 6993861 B2 JP6993861 B2 JP 6993861B2 JP 2017238924 A JP2017238924 A JP 2017238924A JP 2017238924 A JP2017238924 A JP 2017238924A JP 6993861 B2 JP6993861 B2 JP 6993861B2
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presser ring
holding device
optical element
lens
tightening
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JP2018109752A5 (en
JP2018109752A (en
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敏宣 山▲崎▼
英法 中川
顕司 嶋
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Canon Inc
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Description

本発明は保持装置、光学装置、および光学装置を製造する方法に関する。 The present invention relates to a holding device, an optical device, and a method for manufacturing the optical device .

従来より、光学素子をレンズ鏡筒内に収納保持する光学素子保持装置が提案されている。特許文献1に示されるよう、光学素子の外周部の領域を、全周に設けられた座面で保持した保持部材(鏡筒)に、外周部にねじを設けた円環状の押え部材(押え環)によって固定する、という構成の光学素子保持装置が広く用いられている。この種の光学素子保持装置においては、特許文献1の図5に示されているよう、押え環の光軸方向端面に設けられた工具穴に締付工具を挿入し、押え環を回転させてねじ込むことによって光学素子を強固に保持する組立方法が一般的である。 Conventionally, an optical element holding device for storing and holding an optical element in a lens barrel has been proposed. As shown in Patent Document 1, an annular presser member (presser) in which a screw is provided on the outer peripheral portion of a holding member (lens barrel) in which a region of the outer peripheral portion of an optical element is held by a seat surface provided on the entire circumference. An optical element holding device having a structure of fixing by a ring) is widely used. In this type of optical element holding device, as shown in FIG. 5 of Patent Document 1, a tightening tool is inserted into a tool hole provided on the end face of the presser ring in the optical axis direction, and the presser ring is rotated. An assembly method that firmly holds the optical element by screwing it in is common.

また、特許文献2には露光装置に用いる光学素子保持装置が開示されている。それは、120度ピッチで同一円周状に配置された3つの凸部を有するレンズと、当該レンズを前述の3つの凸部を介して3点支持するレンズ保持部材を備える光学素子保持装置を適用し、所望の解像度で露光する露光装置を提供する、というものであった。 Further, Patent Document 2 discloses an optical element holding device used for an exposure apparatus. It applies an optical element holding device including a lens having three convex portions arranged on the same circumference at a pitch of 120 degrees and a lens holding member that supports the lens at three points via the three convex portions described above. However, the present invention is to provide an exposure apparatus that exposes at a desired resolution.

特開2008-233631号公報Japanese Unexamined Patent Publication No. 2008-233631 特開2002-267910号公報Japanese Unexamined Patent Publication No. 2002-267910

しかしながら、上述の背景技術の項で説明した従来の光学素子保持装置では、組立時の押え環の回転によってねじ込み固定を行う際にレンズ変形が生じ、その結果として光学性能が変化し、撮影装置全体の結像性能が変化してしまう場合がある。そのため、当該変化に留意する必要がある。 However, in the conventional optical element holding device described in the above-mentioned background technology section, lens deformation occurs when screwing and fixing due to the rotation of the holding ring at the time of assembly, and as a result, the optical performance changes, and the entire photographing device The imaging performance of the image may change. Therefore, it is necessary to pay attention to the change.

ここで、図6乃至8を用いてこの問題を簡単に説明する。
図6は従来の光学素子保持装置U100の断面図、図7は、光学素子保持装置U100の組立の様子およびその時の押え環に発生する力のつり合い関係を示す図である。
Here, this problem will be briefly described with reference to FIGS. 6 to 8.
FIG. 6 is a cross-sectional view of a conventional optical element holding device U100, and FIG. 7 is a diagram showing a state of assembly of the optical element holding device U100 and a balance relationship of forces generated in a holding ring at that time.

光学素子保持装置U100の組立においては、レンズ101が鏡筒102に収容され、鏡筒ねじ部102aと押え環ねじ部103aが係合された状態で押え環103がねじ込まれることにより固定される。120は締付工具であり、その端部にはピン部120aが設けられている。押え環103の、レンズ光軸方向端面には、工具連結穴103bが形成されており、工具連結穴103bにピン部120aが挿入され、締付工具120に回転トルクTを与えることにより、押え環103の締付が行われる。 In the assembly of the optical element holding device U100, the lens 101 is housed in the lens barrel 102, and the presser ring 103 is screwed in with the lens barrel screw portion 102a and the presser ring screw portion 103a engaged. Reference numeral 120 is a tightening tool, and a pin portion 120a is provided at an end thereof. A tool connecting hole 103b is formed on the end face of the presser ring 103 in the optical axis direction of the lens. The tightening of 103 is performed.

締付時に押え環に発生する力のつり合い関係について、図6および図7を用いて説明する。 The equilibrium relationship of the forces generated in the presser ring during tightening will be described with reference to FIGS. 6 and 7.

締付工具120によって工具連結穴103bに与えられた締付荷重F101と、押え環ねじ部103aで発生する摩擦力F102と、押え環レンズ接触部103cで発生する摩擦力F103、これらがつり合い関係となる。押え環締付は、図7に示すよう、180度ピッチで押え環に2点で当接する構造の締付工具で締め付けることが一般的である。また、押え環ねじ部103aと押え環レンズ接触部103cはレンズの光軸Xに対して360度、略軸対称形状に形成されている。したがって、2ヶ所の工具連結穴103bに発生する荷重F1と、360度全周に渡って発生する、押え環ねじ部103aで発生する摩擦力F102と押え環レンズ接触部103cで発生する摩擦力F103とがつり合い関係となる。ここで、工具連結穴103bは押え環103の光軸方向端面に設けられる構造が一般的であるため、F1の発生箇所とF2およびF3の発生箇所には、光軸方向において、図6中にΔhで示す高さの差が存在する。したがって、上述した力のつり合い関係により、組付時に押え環103には、押え環を捻れ変形させるように働くモーメントMが発生することとなる。 The tightening load F101 applied to the tool connecting hole 103b by the tightening tool 120, the frictional force F102 generated by the presser ring screw portion 103a, and the frictional force F103 generated by the presser ring lens contact portion 103c, are in a balanced relationship. Become. As shown in FIG. 7, the presser ring is generally tightened with a tightening tool having a structure in which the presser ring is in contact with the presser ring at a pitch of 180 degrees at two points. Further, the presser ring screw portion 103a and the presser ring lens contact portion 103c are formed in a substantially axisymmetric shape at 360 degrees with respect to the optical axis X of the lens. Therefore, the load F1 generated in the two tool connecting holes 103b, the frictional force F102 generated in the presser ring screw portion 103a generated over the entire circumference of 360 degrees, and the frictional force F103 generated in the presser ring lens contact portion 103c. Is in a balanced relationship. Here, since the tool connecting hole 103b is generally provided on the end face of the presser ring 103 in the optical axis direction, the location where F1 is generated and the location where F2 and F3 are generated are shown in FIG. 6 in the optical axis direction. There is a difference in height indicated by Δh. Therefore, due to the above-mentioned force balance relationship, a moment M that acts to twist and deform the presser ring 103 is generated in the presser ring 103 at the time of assembly.

図8は、組付時に発生するモーメントMによる押え環103の変形イメージを示す概念図であり、図6中、矢印Vで示す方向から押え環103を見た図である。組付時、上述したモーメントMにより、押え環103は矢印Vで示す方向から見て略8の字になるような変形をする。レンズ101および鏡筒102も、この押え環103の略8の字変形の影響を受けて変形し、締付工具120を離間した後も摩擦により変形状態が維持されてしまう。その結果として、レンズ101の残留ひずみが発生し、光学性能悪化の原因となる。 FIG. 8 is a conceptual diagram showing a deformation image of the presser ring 103 due to the moment M generated at the time of assembly, and is a view of the presser ring 103 viewed from the direction indicated by the arrow V in FIG. At the time of assembly, due to the above-mentioned moment M, the presser ring 103 is deformed so as to have a shape of approximately 8 when viewed from the direction indicated by the arrow V. The lens 101 and the lens barrel 102 are also deformed under the influence of the substantially eight-shaped deformation of the presser ring 103, and the deformed state is maintained by friction even after the tightening tool 120 is separated. As a result, residual strain of the lens 101 is generated, which causes deterioration of optical performance.

本発明は、例えば、光学性能の点で有利な保持装置を提供することを目的とする。 An object of the present invention is, for example, to provide a holding device which is advantageous in terms of optical performance.

上記目的を達成するため、本発明に係る保持装置は、光学素子を保持する保持装置であって、軸を有し、第1ねじ部を含む鏡筒と、前記第1ねじ部と螺合する第2ねじ部を含み、前記軸の方向において前記光学素子を前記鏡筒に押圧して前記光学素子を押さえる環状の押え部材と、を有し、前記押え部材は、前記第1ねじ部と前記第2ねじ部とが互いに螺合している状態で前記押え部材を締め付ける締付工具に係合する係合部が形成され、該係合部は、該係合部の少なくとも一部が、前記軸の方向に直交する方向において前記第2ねじ部の領域に対して反対の領域内に配されるように形成されている、ことを特徴とする。
In order to achieve the above object, the holding device according to the present invention is a holding device that holds an optical element, has a shaft, and is screwed into a lens barrel including a first screw portion and the first screw portion . It has an annular pressing member including a second screw portion and pressing the optical element against the lens barrel in the direction of the axis to press the optical element, and the pressing member has the first screw portion and the said. An engaging portion is formed to engage with a tightening tool for tightening the holding member in a state where the second screw portion is screwed to each other , and at least a part of the engaging portion is the above-mentioned engaging portion. It is characterized in that it is formed so as to be arranged in a region opposite to the region of the second screw portion in a direction orthogonal to the direction of the axis .

本発明によれば、例えば、光学性能の点で有利な保持装置を提供することができる。 According to the present invention, for example, it is possible to provide a holding device which is advantageous in terms of optical performance.

実施例1の光学素子保持装置の断面図Sectional drawing of the optical element holding apparatus of Example 1 実施例1の光学素子保持装置の組立に用いる締付工具を示す図The figure which shows the tightening tool used for assembling the optical element holding apparatus of Example 1. 実施例1の光学素子保持装置の組立の様子を示す図The figure which shows the state of assembling the optical element holding apparatus of Example 1. 光学素子保持装置での変形低減効果を説明する図The figure explaining the deformation reduction effect in an optical element holding device 光学素子保持装置を示す図((a)実施例1の変形例、(b)実施例1の別の変形例、(c)実施例2、(d)実施例3)The figure which shows the optical element holding apparatus ((a) modification of Example 1, (b) another modification of Example 1, (c) Example 2, (d) Example 3) 従来例の光学素子保持装置の断面図Cross-sectional view of the conventional optical element holding device 従来例の光学素子保持装置の組立の様子を示す図The figure which shows the state of assembling of the optical element holding apparatus of a conventional example. 締付時の押え環の変形状態の概念図Conceptual diagram of the deformed state of the presser ring at the time of tightening 締付工具を示す図((a)実施例1の第一変形例、(b)実施例1の第二変形例、(c)実施例2)The figure which shows the tightening tool ((a) first modification of Example 1, (b) second modification of Example 1, (c) Example 2)

図1から図4を用いて、本発明の実施例1に係る光学素子保持装置U1について説明する。
図1は、本実施例の光学素子保持装置U1の断面図である。図2は、本実施例の光学素子保持装置U1の組立に用いる締付工具(締付手段)を示す図である。図3は、本実施例の光学素子保持装置Uの組立の様子およびその時の押え環に発生する力のつり合い関係を示す図である。
The optical element holding device U1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 is a cross-sectional view of the optical element holding device U1 of this embodiment. FIG. 2 is a diagram showing a tightening tool (tightening means) used for assembling the optical element holding device U1 of this embodiment. FIG. 3 is a diagram showing a state of assembly of the optical element holding device U of the present embodiment and a balance relationship of forces generated in the holding ring at that time.

鏡筒2に収容されたレンズ1が押え部材となる押え環3によって保持される。Xはレンズ1の光軸であり、鏡筒2および押え環3は、光軸Xに対して略軸対称形状の環状の構造物である。押え環3には、雌ねじの押え環ねじ部3aが設けられており、鏡筒に設けられた雄ねじの鏡筒ねじ部2aと係合する。また、押え環3は、押え環レンズ接触部3cを有しており、組立完了後には、押え環レンズ接触部3cがレンズ1と当接する。また、押え環の外周側面(外面)の対向する2箇所に、穴部3bが形成されており、これが押え環3の締付時に工具穴(係合部)として用いられる。穴部3bは、光軸方向(図中のX方向、押え環ねじ部3aの軸方向)において、押え環ねじ部3aと押え環レンズ接触部3cから構成される領域W内に、押え環ねじ部3aの径方向に形成されている。図2において、20は締付工具であり、その端部にはピン部20aが設けられている。ピン部20aは、図中矢印rで示す方向に移動可能な構造となっている。 The lens 1 housed in the lens barrel 2 is held by the presser ring 3 which is a presser member. X is the optical axis of the lens 1, and the lens barrel 2 and the holding ring 3 are annular structures having a shape substantially axisymmetric with respect to the optical axis X. The presser ring 3 is provided with a female thread presser ring screw portion 3a, and engages with the male screw barrel thread portion 2a provided on the lens barrel. Further, the presser ring 3 has a presser ring lens contact portion 3c, and the presser ring lens contact portion 3c comes into contact with the lens 1 after the assembly is completed. Further, hole portions 3b are formed at two facing positions on the outer peripheral side surface (outer surface) of the presser ring, and these holes are used as tool holes (engagement portions) when the presser ring 3 is tightened. The hole portion 3b is formed in the region W composed of the presser ring screw portion 3a and the presser ring lens contact portion 3c in the optical axis direction (X direction in the figure, the axial direction of the presser ring screw portion 3a). It is formed in the radial direction of the portion 3a. In FIG. 2, reference numeral 20 is a tightening tool, and a pin portion 20a is provided at an end thereof. The pin portion 20a has a structure that can be moved in the direction indicated by the arrow r in the figure.

図2および図3を用いて、本実施例の光学素子保持装置U1の組立方法について説明する。なお、図3においては、構造を理解しやすいよう、締付工具20の全体は不図示とし、ピン部20aのみ図示している。 A method of assembling the optical element holding device U1 of the present embodiment will be described with reference to FIGS. 2 and 3. In FIG. 3, the entire tightening tool 20 is not shown and only the pin portion 20a is shown so that the structure can be easily understood.

鏡筒2にレンズ1を収容し、鏡筒ねじ部2aと押え環ねじ部3aを係合させ、押え環3を所定の位置に仮固定する。押え環3の締付工程においては、締付工具20のピン部20aを穴部(係合部)3bに挿入した状態で、締付工具20に締付トルクTrを与える。これにより、押え環3が鏡筒2にねじ込まれ、押え環レンズ接触部3cがレンズ1に当接し、レンズ1が鏡筒2に押圧され(押え環レンズ接触部3cと鏡筒2の当接部2bとの間で挟持され)、強固に保持される。所定の締付トルクまで締付を行った後、ピン部20aを穴部3bから離間し、押え環3の締付工程が完了する。 The lens 1 is housed in the lens barrel 2, the lens barrel screw portion 2a and the presser ring screw portion 3a are engaged with each other, and the presser ring 3 is temporarily fixed at a predetermined position. In the tightening step of the presser ring 3, the tightening torque Tr is applied to the tightening tool 20 in a state where the pin portion 20a of the tightening tool 20 is inserted into the hole portion (engagement portion) 3b. As a result, the presser ring 3 is screwed into the lens barrel 2, the presser ring lens contact portion 3c abuts on the lens 1, and the lens 1 is pressed against the lens barrel 2 (contact between the presser ring lens contact portion 3c and the lens barrel 2). It is sandwiched between the portion 2b) and is firmly held. After tightening to a predetermined tightening torque, the pin portion 20a is separated from the hole portion 3b, and the tightening step of the presser ring 3 is completed.

ここで、図2を用いて、押え環締付時に押え環に発生する力のつり合い関係について説明する。 Here, with reference to FIG. 2, the equilibrium relationship of the forces generated in the presser ring when the presser ring is tightened will be described.

締付工具20によって穴部3bに与えられた締付荷重F1と、押え環ねじ部3aで発生する摩擦力F2と、押え環レンズ接触部3cで発生する摩擦力F3、これらがつり合い関係となる。前述のように、穴部3bは押え環3外周側面の対向する2箇所に設けられており、押え環ねじ部3aと押え環レンズ接触部3cは光軸Xに対して360度、略軸対称に設けられている。2箇所の穴部3bで発生する締付荷重F1と、360度全周に渡って発生する、押え環ねじ部3aで発生する摩擦力F2と押え環レンズ接触部3cで発生する摩擦力F3とがつり合い関係となる。しかし、上述のように、穴部3bは、光軸方向において、押え環ねじ部3aと押え環レンズ接触部3cから構成される領域W内に配設されている。そのため、「発明が解決しようとする課題」の項で説明した従来の光学素子保持装置のように、締付荷重がかかる箇所と摩擦力が発生する箇所の光軸方向の位置の差に起因する捻れモーメントが発生しにくく、締付時の押え環3の捻れ変形を低減することができる。したがって、締付時の押え環3の変形の影響による、レンズ1および鏡筒2の変形も低減され、締付工具20を離間した後に残留するレンズ1の変形を低減できる。 The tightening load F1 applied to the hole portion 3b by the tightening tool 20, the frictional force F2 generated by the presser ring screw portion 3a, and the frictional force F3 generated by the presser ring lens contact portion 3c are in a balanced relationship. .. As described above, the hole portions 3b are provided at two opposite positions on the outer peripheral side surface of the presser ring 3, and the presser ring screw portion 3a and the presser ring lens contact portion 3c are approximately 360 degrees symmetrical with respect to the optical axis X. It is provided in. The tightening load F1 generated in the two hole portions 3b, the frictional force F2 generated in the presser ring screw portion 3a and the frictional force F3 generated in the presser ring lens contact portion 3c, which are generated over the entire circumference of 360 degrees. Becomes a balanced relationship. However, as described above, the hole portion 3b is arranged in the region W composed of the presser ring screw portion 3a and the presser ring lens contact portion 3c in the optical axis direction. Therefore, it is caused by the difference in the position in the optical axis direction between the place where the tightening load is applied and the place where the frictional force is generated, as in the conventional optical element holding device described in the section of "Problems to be solved by the invention". Twisting moments are less likely to occur, and twisting deformation of the presser ring 3 during tightening can be reduced. Therefore, the deformation of the lens 1 and the lens barrel 2 due to the deformation of the presser ring 3 at the time of tightening is also reduced, and the deformation of the lens 1 remaining after the tightening tool 20 is separated can be reduced.

ここで、コンピュータと市販の解析用ソフトウェアを用いた有限要素法によるシミュレーションにより本発明の効果確認を行った結果について説明する。鏡筒、レンズ、押え環のメッシュモデルを作成し、鏡筒を拘束した状態で押え環に所定の締付トルクを付与するという条件で、接触を考慮した変形解析を実施した。なお、鏡筒ねじ部と押え環ねじ部については、ねじ山形状も詳細に表現したメッシュモデルを計算に用いた。 Here, the result of confirming the effect of the present invention by the simulation by the finite element method using a computer and commercially available analysis software will be described. A mesh model of the lens barrel, lens, and presser ring was created, and deformation analysis was performed in consideration of contact under the condition that a predetermined tightening torque was applied to the presser ring while the lens barrel was restrained. For the lens barrel thread and the presser ring thread, a mesh model that also expresses the thread shape in detail was used for the calculation.

図4は、解析結果からデータ処理により抽出した、締付トルクとレンズ歪量の関係を示すグラフである。横軸が締付トルク、縦軸がレンズ歪量である。レンズ歪量については、レンズの片側表面上の節点の、光軸方向変位の最大値と最小値の差をもって、レンズ歪量と定義している。本解析においては、図4中に示すよう、まず所定の設定トルクT1まで締付トルクを付与する計算ステップを設定する。その後、締付トルクを解放する計算ステップを設定することにより、光学素子保持装置の組立における押え環の締付工程を再現し、摩擦の影響で発生するレンズの残留歪を表現している。 FIG. 4 is a graph showing the relationship between the tightening torque and the amount of lens strain extracted from the analysis results by data processing. The horizontal axis is the tightening torque, and the vertical axis is the amount of lens strain. The amount of lens distortion is defined as the amount of lens distortion, which is the difference between the maximum and minimum values of the displacement in the optical axis direction of the nodes on one side surface of the lens. In this analysis, as shown in FIG. 4, first, a calculation step for applying a tightening torque up to a predetermined set torque T1 is set. After that, by setting a calculation step to release the tightening torque, the tightening process of the presser ring in the assembly of the optical element holding device is reproduced, and the residual strain of the lens generated by the influence of friction is expressed.

締付トルクは、本実施例モデルについては本実施例で説明した穴部3bに相当する箇所、従来例モデルについては、「発明が解決しようとする課題」で説明した工具連結穴103bに相当する箇所に荷重条件として設定した。 The tightening torque corresponds to the hole portion 3b described in this embodiment for the present embodiment model, and corresponds to the tool connecting hole 103b described in "Problems to be Solved by the Invention" for the conventional example model. It was set as a load condition at the location.

図4からも明らかなように、同一の設定トルクT1で押え環の締付を行った場合の締付完了後に残留するレンズ歪量を比較すると、本実施例の光学素子保持装置でのレンズ歪Z1は従来例の光学素子保持装置でのレンズ歪Z2の約70%に抑えられる。この解析結果により、本実施例で説明した、押え環締め付けによるレンズ変形低減効果が確認できた。 As is clear from FIG. 4, when the amount of lens distortion remaining after the tightening is completed when the presser ring is tightened with the same set torque T1, the lens distortion in the optical element holding device of the present embodiment is compared. Z1 is suppressed to about 70% of the lens distortion Z2 in the conventional optical element holding device. From this analysis result, it was confirmed that the lens deformation reduction effect by tightening the presser ring described in this embodiment was confirmed.

なお、上記のシミュレーション結果は、本発明を適用した光学素子保持装置の一例を評価したものである。レンズ、鏡筒、押え環などの形状あるいは材質などの各種パラメータによって、レンズ変形量あるいは本発明の適用による変形低減効果などが本実施例の説明とは異なってくることは言うまでもない。 The above simulation result is an evaluation of an example of an optical element holding device to which the present invention is applied. Needless to say, the amount of lens deformation or the effect of reducing deformation by applying the present invention differs from the description of this embodiment depending on various parameters such as the shape or material of the lens, lens barrel, holding ring, and the like.

ここで、図5(a)および図5(b)を用いて、本実施例の光学素子保持装置の変形例を説明する。ここまで本実施例では、押え環に設けた穴部3bを用いて押え環の締付を行う形態について詳細に説明したが、本発明の趣旨はこれに限定されるものではない。すなわち、押え環(押え部材)の締付のために締付工具の係合部としての穴部3bを押え環に有する例を説明したところ、当該係合部は、当該穴部には限定されず、以下に例示されたものとしうる。 Here, a modified example of the optical element holding device of this embodiment will be described with reference to FIGS. 5 (a) and 5 (b). Up to this point, in the present embodiment, the mode in which the presser ring is tightened by using the hole portion 3b provided in the presser ring has been described in detail, but the gist of the present invention is not limited thereto. That is, when an example of having a hole portion 3b as an engaging portion of the tightening tool in the pressing ring for tightening the pressing ring (pressing member) is described, the engaging portion is limited to the hole portion. Instead, it may be exemplified below.

例えば、図5(a)は本実施例の第一の変形例の光学素子保持装置U2の断面図である。基本的な構成はこれまで本実施例内で詳細に説明した光学素子保持装置U1と同様であるので、詳細な説明は省略する。押え環3の外周側面の対向する2箇所に、押え環ねじ部(鏡筒ねじ部)の軸方向に延在するように溝部3dが形成されており、これが押え環3の締付時に締付工具当接部(係合部)として用いられる。溝部3dは、前述した光学素子保持装置U1と同様に、光軸方向において、押え環ねじ部3aと押え環レンズ接触部3cから構成される領域W2内に配設されている。 For example, FIG. 5A is a cross-sectional view of the optical element holding device U2 of the first modification of this embodiment. Since the basic configuration is the same as that of the optical element holding device U1 described in detail in the present embodiment, detailed description thereof will be omitted. Grooves 3d are formed at two opposite positions on the outer peripheral side surface of the presser ring 3 so as to extend in the axial direction of the presser ring screw portion (lens barrel screw portion), and these are tightened when the presser ring 3 is tightened. It is used as a tool contact part (engagement part). The groove portion 3d is arranged in the region W2 composed of the presser ring screw portion 3a and the presser ring lens contact portion 3c in the optical axis direction, similarly to the optical element holding device U1 described above.

上述のように、溝部3dは、その少なくとも一部が光軸方向に関し、押え環ねじ部3aと押え環レンズ接触部3cから構成される領域W2内に配設されている。そのため、「発明が解決しようとする課題」の項で説明した従来の光学素子保持装置のように、締付荷重がかかる箇所と摩擦力が発生する箇所の光軸方向の位置の差に起因する捻れモーメントが発生しにくく、締付時の押え環3の捻れ変形を低減することができる。 As described above, at least a part of the groove portion 3d is arranged in the region W2 composed of the presser ring screw portion 3a and the presser ring lens contact portion 3c in the optical axis direction. Therefore, it is caused by the difference in the position in the optical axis direction between the place where the tightening load is applied and the place where the frictional force is generated, as in the conventional optical element holding device described in the section of "Problems to be solved by the invention". Twisting moments are less likely to occur, and twisting deformation of the presser ring 3 during tightening can be reduced.

また、図5(b)は本実施例の第二の変形例の光学素子保持装置U3の断面図である。基本的な構成はこれまで本実施例内で詳細に説明した光学素子保持装置U1と同様であるので、詳細な説明は省略する。押え環3の外周側面の対向する2箇所に、外周側面から押え環ねじ部3aの径方向に突出するように突起部3eが形成されており、これが押え環3の締付時に締付工具当接部(係合部)として用いられる。突起部3eは、前述した光学素子保持装置U1と同様に、光軸方向において、押え環ねじ部3aと押え環レンズ接触部3cから構成される領域W3内に配設されている。 Further, FIG. 5B is a cross-sectional view of the optical element holding device U3 of the second modification of this embodiment. Since the basic configuration is the same as that of the optical element holding device U1 described in detail in the present embodiment, detailed description thereof will be omitted. Protrusions 3e are formed at two opposite positions on the outer peripheral side surface of the presser ring 3 so as to project from the outer peripheral side surface in the radial direction of the presser ring screw portion 3a. It is used as a contact part (engagement part). Similar to the above-mentioned optical element holding device U1, the protrusion 3e is arranged in the region W3 composed of the presser ring screw portion 3a and the presser ring lens contact portion 3c in the optical axis direction.

上述のように、突起部3eは、光軸方向において、押え環ねじ部3aと押え環レンズ接触部3cから構成される領域W3内に配設されている。そのため、「発明が解決しようとする課題」の項で説明した従来の光学素子保持装置のように、締付荷重がかかる箇所と摩擦力が発生する箇所の光軸方向の位置の差に起因する捻れモーメントが発生しにくく、締付時の押え環3の捻れ変形を低減することができる。 As described above, the protrusion 3e is arranged in the region W3 composed of the presser ring screw portion 3a and the presser ring lens contact portion 3c in the optical axis direction. Therefore, it is caused by the difference in the position in the optical axis direction between the place where the tightening load is applied and the place where the frictional force is generated, as in the conventional optical element holding device described in the section of "Problems to be solved by the invention". Twisting moments are less likely to occur, and twisting deformation of the presser ring 3 during tightening can be reduced.

押え環3を鏡筒2へ螺合させて、押え環3の押え環レンズ接触部3cでレンズ1を押圧するときの理想的な状態は、締付工具によって押え環3に加えられる力によって押え環3が変形せず、それにより押え環3の接触部が一様な押圧力でレンズ1を押圧する状態である。すなわち、締付工具20が押え環3に力を加える場所は押え環3上にできるだけ均一に分散して一様に力が加えられる場合である。それを実現する一つの方法として、使用する力の範囲において発生する歪が許容範囲内となるような剛性を有する押え環として設計することが考えられる。一方、レンズ装置(光学装置)は要求される光学性能を満足するために通常複数のレンズを含み、個々のレンズに対して本発明の光学素子保持機構が使用されることになる。そのため、押え環3の光軸方向の厚さを厚くすることは困難な場合が多く、従来技術のような工具連結穴103bを力点として締付力を加えても光学性能に影響を及ぼさない変形しかしないような剛性の高い押え環とすることは困難である場合が多い。 The ideal state when the presser ring 3 is screwed into the lens barrel 2 and the lens 1 is pressed by the presser ring lens contact portion 3c of the presser ring 3 is the presser by the force applied to the presser ring 3 by the tightening tool. The ring 3 is not deformed, so that the contact portion of the presser ring 3 presses the lens 1 with a uniform pressing force. That is, the place where the tightening tool 20 applies the force to the presser ring 3 is the case where the force is uniformly dispersed on the presser ring 3 as much as possible. As one method to realize this, it is conceivable to design the holding ring having rigidity so that the strain generated in the range of the force used is within the allowable range. On the other hand, a lens device (optical device) usually includes a plurality of lenses in order to satisfy the required optical performance, and the optical element holding mechanism of the present invention is used for each lens. Therefore, it is often difficult to increase the thickness of the presser ring 3 in the optical axis direction, and deformation that does not affect the optical performance even if a tightening force is applied using the tool connecting hole 103b as a force point as in the prior art. However, it is often difficult to make a presser ring with high rigidity that does not exist.

また、押え環3を鏡筒2へ螺合させて押え環レンズ接触部3cでレンズ1を押圧するとき、鏡筒2に対し押え環3を周方向へ回動させる力(締付荷重F1)に対する抗力は、押え環ねじ部3aの摩擦力F2と、押え環レンズ接触部3cの摩擦力F3である。鏡筒ねじ部2aと押え環ねじ部3aとの接触面積の方が、押え環レンズ接触部3cとレンズとの接触面積より大きいことなどにより、前記抗力としては押え環ねじ部3aで発生する摩擦力F2が支配的となる場合が多い。そのため、穴部3b、溝部3d、4f、突起部3eなど(力点)に締付力を付与した場合は、従来例の工具連結穴103bで締付けた場合に比べ、鏡筒ねじ部2aと押え環ねじ部3aとの接触部と力点との間の距離が短いため、モーメントを小さくすることができる。すなわち、これらの観点において本発明の構成は、穴部3b、溝部3d、4f、突起部3eなどの力点を、押え環ねじ部の軸方向において、鏡筒ねじ部2aと押え環ねじ部3aの接触する範囲内に配置することにより、従来型に対して押え環3の捻れ変形を抑制し、より均一な押圧力で押圧してレンズを保持することができる。 Further, when the presser ring 3 is screwed into the lens barrel 2 and the lens 1 is pressed by the presser ring lens contact portion 3c, a force that rotates the presser ring 3 in the circumferential direction with respect to the lens barrel 2 (tightening load F1). The drag force against the pressure is the frictional force F2 of the presser ring screw portion 3a and the frictional force F3 of the presser ring lens contact portion 3c. Since the contact area between the lens barrel screw portion 2a and the presser ring screw portion 3a is larger than the contact area between the presser ring lens contact portion 3c and the lens, the drag generated by the presser ring screw portion 3a is used as the drag force. Force F2 is often dominant. Therefore, when a tightening force is applied to the hole portion 3b, the groove portion 3d, 4f, the protrusion portion 3e, etc. (force point), the lens barrel screw portion 2a and the presser ring are compared with the case where the tightening force is applied by the tool connecting hole 103b of the conventional example. Since the distance between the contact portion with the screw portion 3a and the force point is short, the moment can be reduced. That is, from these viewpoints, the configuration of the present invention is to place the force points such as the hole portion 3b, the groove portion 3d, 4f, and the protrusion portion 3e on the lens barrel thread portion 2a and the presser ring thread portion 3a in the axial direction of the presser ring thread portion. By arranging the lens within the contact range, it is possible to suppress the torsional deformation of the presser ring 3 as compared with the conventional type, and press the presser ring 3 with a more uniform pressing force to hold the lens.

本実施例の光学素子保持装置において、押え環に穴部、溝部、突起部のいずれを設けるかは、製品構造上の制約や生産上の都合により適宜選択して構わない。 In the optical element holding device of this embodiment, which of the hole portion, the groove portion, and the protrusion portion is provided in the holding ring may be appropriately selected depending on the restrictions on the product structure and the convenience of production.

また、本実施例の説明においては、押え環の締付に用いる穴部、溝部、突起部が押え環の外周側面の対向する2箇所、すなわち180度ピッチで形成されている構成について説明した。しかし、本発明の趣旨はこれに限定されるものではなく、例えば、90度ピッチ、60度ピッチ等、任意の間隔で任意の個数、穴部、溝部、突起部が形成されていても構わない。光学素子保持装置の組立においては、一度やや軽めに締付を行った後に、締付工具の当接位置を変えて増し締めを行うなど、作業者の知見に基づく作業上の工夫を施すことにより、締付時の押え環の変形をさらに低減し、本発明の効果をより高めることができる。 Further, in the description of this embodiment, a configuration is described in which the holes, grooves, and protrusions used for tightening the presser ring are formed at two opposite positions on the outer peripheral side surface of the presser ring, that is, at a pitch of 180 degrees. However, the gist of the present invention is not limited to this, and any number, holes, grooves, and protrusions may be formed at arbitrary intervals such as 90 degree pitch and 60 degree pitch. .. When assembling the optical element holding device, after tightening it slightly lightly, change the contact position of the tightening tool and perform retightening, etc., and take work measures based on the knowledge of the operator. Thereby, the deformation of the presser ring at the time of tightening can be further reduced, and the effect of the present invention can be further enhanced.

以上説明したように、本実施例の光学素子保持装置を適用することにより、押え環締付によるレンズの変形を低減でき、光学性能の悪化が発生しにくい光学素子保持装置を提供することができる。 As described above, by applying the optical element holding device of the present embodiment, it is possible to provide an optical element holding device that can reduce deformation of the lens due to presser ring tightening and is less likely to cause deterioration of optical performance. ..

図5(c)を用いて、本実施例に係る光学素子保持装置U4について説明する。
実施例1では、鏡筒の外周部に雄ねじが形成され、押え環の内周部に雌ねじが形成された、いわゆる外ねじ鏡筒タイプの構造の光学素子保持装置について説明した。しかし、本発明の趣旨はこれに限定されるものではなく、鏡筒の内周部に雌ねじが形成され、押え環の外周部に雄ねじが形成された、いわゆる内ねじ鏡筒タイプの光学素子保持装置においても本発明を適用できる。
The optical element holding device U4 according to this embodiment will be described with reference to FIG. 5 (c).
In Example 1, an optical element holding device having a so-called external screw lens barrel type structure, in which a male screw is formed on the outer peripheral portion of the lens barrel and a female screw is formed on the inner peripheral portion of the presser ring, has been described. However, the gist of the present invention is not limited to this, and a so-called internal screw lens barrel type optical element holding in which a female screw is formed on the inner peripheral portion of the lens barrel and a male screw is formed on the outer peripheral portion of the presser ring. The present invention can also be applied to the device.

図5(c)は、本実施例に係る光学素子保持装置U4の断面図である。
鏡筒2に収容されたレンズ1が押え部材となる押え環4によって保持される。Xはレンズ1の光軸であり、鏡筒2および押え環4は、光軸Xに対して略軸対称形状の環状の構造物である。押え環4には、雄ねじの押え環ねじ部4aが設けられており、鏡筒に設けられた雌ねじの鏡筒ねじ部2cと係合する。また、押え環4は、押え環レンズ当接部4cを有しており、組立完了後には、押え環レンズ当接部4cがレンズ1と当接する。また、押え環4の内周側面(内面)の対向する2箇所に、溝部4fが形成されており、これが押え環4の締付時に締付工具当接部(係合部)として用いられる。溝部4fは、光軸方向において、少なくともその一部が押え環ねじ部4aと押え環レンズ当接部4cから構成される領域内に配設されている。
FIG. 5C is a cross-sectional view of the optical element holding device U4 according to the present embodiment.
The lens 1 housed in the lens barrel 2 is held by the presser ring 4 which is a presser member. X is the optical axis of the lens 1, and the lens barrel 2 and the holding ring 4 are annular structures having a shape substantially axisymmetric with respect to the optical axis X. The presser ring 4 is provided with a male thread presser ring screw portion 4a and engages with the female screw barrel thread portion 2c provided on the lens barrel. Further, the presser ring 4 has a presser ring lens contact portion 4c, and after the assembly is completed, the presser ring lens contact portion 4c comes into contact with the lens 1. Further, groove portions 4f are formed at two opposite positions on the inner peripheral side surface (inner surface) of the presser ring 4, and these are used as a tightening tool contact portion (engagement portion) when the presser ring 4 is tightened. At least a part of the groove portion 4f is arranged in the region including the presser ring screw portion 4a and the presser ring lens contact portion 4c in the optical axis direction.

本実施例の光学素子保持装置U4においては、上述したよう、溝部4fは、光軸方向において、少なくともその一部が押え環ねじ部4aと押え環レンズ当接部4cから構成される螺合領域内W4に配設されている。そのため、実施例1と同様、従来例の光学素子保持装置のような締付荷重がかかる箇所と摩擦力が発生する箇所の光軸方向の位置の差に起因する捻れモーメントが発生しにくく、締付時の押え環4の捻れ変形を低減することができる。したがって、締付時の押え環4の変形の影響による、レンズ1および鏡筒2の変形も低減され、締付完了後に残留するレンズ1の変形を低減することができる。 In the optical element holding device U4 of this embodiment, as described above, the groove portion 4f is a screw region in which at least a part thereof is composed of a presser ring screw portion 4a and a presser ring lens contact portion 4c in the optical axis direction. It is arranged in W4. Therefore, as in the first embodiment, the twisting moment due to the difference in the position in the optical axis direction between the place where the tightening load is applied and the place where the frictional force is generated as in the conventional optical element holding device is less likely to occur, and the tightening moment is less likely to occur. It is possible to reduce the torsional deformation of the presser ring 4 at the time of attachment. Therefore, the deformation of the lens 1 and the lens barrel 2 due to the deformation of the presser ring 4 at the time of tightening is also reduced, and the deformation of the lens 1 remaining after the tightening is completed can be reduced.

また、実施例1と同様、押え環4に設ける溝部4fについては、製品構造上の制約や生産上の都合により、穴部や突起部に変更しても構わない。 Further, as in the first embodiment, the groove portion 4f provided in the presser ring 4 may be changed to a hole portion or a protrusion portion due to restrictions on the product structure or convenience in production.

本実施例の構成により、鏡筒内周に雌ねじが形成され、押え環外周に雄ねじが形成された、いわゆる内ねじ鏡筒タイプの光学素子保持装置において、押え環締付によるレンズの変形を低減でき、光学性能の低下を抑制した光学素子保持装置を提供することができる。 According to the configuration of this embodiment, in a so-called internal screw lens barrel type optical element holding device in which a female screw is formed on the inner circumference of the lens barrel and a male screw is formed on the outer periphery of the presser ring, deformation of the lens due to tightening of the presser ring is reduced. It is possible to provide an optical element holding device that suppresses deterioration of optical performance.

図5(d)を用いて、本実施例に係る光学素子保持装置U5について説明する。
なお、基本的な構造は実施例1で説明した光学素子保持装置と同様であるため、図中、同一の構成要素は同一の符号で示し、ここでは詳細な説明は省略する。
The optical element holding device U5 according to this embodiment will be described with reference to FIG. 5D.
Since the basic structure is the same as that of the optical element holding device described in the first embodiment, the same components are indicated by the same reference numerals in the drawings, and detailed description thereof will be omitted here.

本実施例の光学素子保持装置U5に用いる押え環3の押え環の外周側面の対向する2箇所に、貫通穴3gが設けられている。貫通穴3gは、光軸方向において、押え環ねじ部3aと押え環レンズ接触部3cから構成される領域W5内に配設されている。組立に際しては、実施例1での説明と同様、まず、この貫通穴3gを締付工具当接部(係合部)として用い、押え環3の締め付け固定を行う。その後、組立完了後の押え環の緩みを防止するために、接着剤塗布装置40により貫通穴に接着剤41を塗布し、鏡筒ねじ部2aと押え環ねじ部3aを接着固定する。すなわち、本実施例の光学素子保持装置では、押え環3に設けられた貫通穴3gが、押え環締め付けに用いる工具穴としての機能と、接着剤塗布部としての機能の両方を果たす構成となる。 Through holes 3g are provided at two facing positions on the outer peripheral side surface of the pressing ring 3 of the pressing ring 3 used in the optical element holding device U5 of this embodiment. The through hole 3g is arranged in the region W5 composed of the presser ring screw portion 3a and the presser ring lens contact portion 3c in the optical axis direction. At the time of assembly, as in the description in the first embodiment, first, the through hole 3g is used as the tightening tool contact portion (engagement portion), and the presser ring 3 is tightened and fixed. After that, in order to prevent the presser ring from loosening after the assembly is completed, the adhesive 41 is applied to the through hole by the adhesive application device 40, and the lens barrel screw portion 2a and the presser ring screw portion 3a are adhesively fixed. That is, in the optical element holding device of the present embodiment, the through hole 3g provided in the presser ring 3 has both a function as a tool hole used for tightening the presser ring and a function as an adhesive coating portion. ..

本実施例の光学素子保持装置U5においては、上述したよう、貫通穴3gは、光軸方向において、押え環ねじ部3aと押え環レンズ接触部3cから構成される領域W5内に配設されている。そのため、実施例1で説明した光学素子保持装置U1と同様、従来例の光学素子保持装置のような締付荷重がかかる箇所と摩擦力が発生する箇所の光軸方向の位置の差に起因する捻れモーメントが発生しにくく、締付時の押え環3の捻れ変形を低減することができる。したがって、締付時の押え環3の変形の影響による、レンズ1および鏡筒2の変形も低減され、締付完了後に残留するレンズ1の変形を低減することができる。さらに、上述したよう、貫通穴3gを用いて鏡筒ねじ部2aと押え環ねじ部3aに接着剤41を塗布することにより、押え環3によるレンズ1の保持強度を高めることができる。 In the optical element holding device U5 of this embodiment, as described above, the through hole 3g is arranged in the region W5 composed of the presser ring screw portion 3a and the presser ring lens contact portion 3c in the optical axis direction. There is. Therefore, similar to the optical element holding device U1 described in the first embodiment, it is caused by the difference in the position in the optical axis direction between the place where the tightening load is applied and the place where the frictional force is generated as in the conventional optical element holding device. Twisting moments are less likely to occur, and twisting deformation of the presser ring 3 during tightening can be reduced. Therefore, the deformation of the lens 1 and the lens barrel 2 due to the deformation of the presser ring 3 at the time of tightening is also reduced, and the deformation of the lens 1 remaining after the tightening is completed can be reduced. Further, as described above, by applying the adhesive 41 to the lens barrel screw portion 2a and the presser ring screw portion 3a using the through hole 3 g, the holding strength of the lens 1 by the presser ring 3 can be increased.

以上説明したように、本実施例の光学素子保持装置を適用することにより、押え環締付によるレンズの変形を低減でき、光学性能の悪化が発生しにくく、かつ、高いレンズ保持強度を有する、耐衝撃性にも優れた光学素子保持装置を提供することができる。 As described above, by applying the optical element holding device of this embodiment, the deformation of the lens due to the tightening of the presser ring can be reduced, the deterioration of the optical performance is unlikely to occur, and the lens holding strength is high. It is possible to provide an optical element holding device having excellent impact resistance.

実施例においては、本発明の光学素子保持装置で保持する光学素子が単レンズである場合を例示して説明したが本発明はこれに限定されるものではない。単レンズの他、レンズ装置の鏡筒内に光学系を構成する光学素子には同様に適用することができる。例えば、光軸に対して垂直方向の成分を有する方向に移動可能に防振レンズを支持する防振ユニット、絞りユニット、フィルタ等を保持する場合にも同様の効果を享受することができる。 In the examples, the case where the optical element held by the optical element holding device of the present invention is a single lens has been described as an example, but the present invention is not limited thereto. In addition to a single lens, it can be similarly applied to an optical element constituting an optical system in a lens barrel of a lens device. For example, the same effect can be enjoyed when holding an anti-vibration unit, an aperture unit, a filter, etc. that support the anti-vibration lens so as to be movable in a direction having a component in the direction perpendicular to the optical axis.

本発明の光学素子保持装置に保持された光学要素を有するレンズ装置を構成することによって、本発明の効果を享受するレンズ装置を提供することができる。また、本発明の光学素子保持装置に保持された光学要素を有するレンズ装置と、該レンズ装置によって形成される光学像を受光する撮像素子を有するカメラ装置とにより、本発明の効果を享受する撮像装置(光学装置)を提供することができる。 By constructing a lens device having an optical element held by the optical element holding device of the present invention, it is possible to provide a lens device that enjoys the effects of the present invention. Further, an image pickup that enjoys the effect of the present invention by a lens device having an optical element held by the optical element holding device of the present invention and a camera device having an image pickup element that receives an optical image formed by the lens device. A device (optical device) can be provided.

以上、本発明の好ましい実施形態について説明したが、本発明はこれらの実施形態に限定されないことはいうまでもなく、その要旨の範囲内で種々の変形および変更が可能である。例えば、実施例1において示した締付工具20は、実施例1の第一変形例、実施例1の第二変形例、および実施例2にそれぞれ整合させて、以下のように変更されうる。 Although the preferred embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof. For example, the tightening tool 20 shown in the first embodiment can be modified as follows in accordance with the first modification of the first embodiment, the second modification of the first embodiment, and the second embodiment.

まず、図9(a)は、実施例1の第一変形例に関する締付工具を示す図である。図9(a)において、締付工具21は、その一部(凸部)が、押え環3に形成された上述の溝部3dに係合するように構成されている。そのような係合状態で、締付工具21に締付トルクTrを与えればよい。これにより、押え環3が鏡筒2にねじ込まれ、押え環3の接触部3cがレンズ1に当接し、レンズ1は、鏡筒2に押圧され(接触部3cと鏡筒2の当接部2bとの間で挟持され)、鏡筒2により強固に保持される。 First, FIG. 9A is a diagram showing a tightening tool related to the first modification of the first embodiment. In FIG. 9A, the tightening tool 21 is configured such that a part (convex portion) thereof engages with the above-mentioned groove portion 3d formed in the holding ring 3. In such an engaged state, the tightening torque Tr may be applied to the tightening tool 21. As a result, the presser ring 3 is screwed into the lens barrel 2, the contact portion 3c of the presser ring 3 abuts on the lens 1, and the lens 1 is pressed against the lens barrel 2 (the contact portion between the contact portion 3c and the lens barrel 2). It is sandwiched between 2b) and is firmly held by the lens barrel 2.

また、図9(b)は、実施例1の第二変形例に関する締付工具を示す図である。図9(b)において、締付工具22は、その凹部が、押え環3に形成された上述の突起部3eに係合するように構成されている。そのような係合状態で、締付工具22に締付トルクTrを与えればよい。これにより、押え環3が鏡筒2にねじ込まれ、押え環3の接触部3cがレンズ1に当接し、レンズ1は、鏡筒2に押圧され(接触部3cと鏡筒2の当接部2bとの間で挟持され)、鏡筒2により強固に保持される。 Further, FIG. 9B is a diagram showing a tightening tool relating to the second modification of the first embodiment. In FIG. 9B, the tightening tool 22 is configured such that the recess thereof engages with the above-mentioned protrusion 3e formed on the holding ring 3. In such an engaged state, the tightening torque Tr may be applied to the tightening tool 22. As a result, the presser ring 3 is screwed into the lens barrel 2, the contact portion 3c of the presser ring 3 abuts on the lens 1, and the lens 1 is pressed against the lens barrel 2 (the contact portion between the contact portion 3c and the lens barrel 2). It is sandwiched between 2b) and is firmly held by the lens barrel 2.

さらに、図9(c)は、実施例2に関する締付工具を示す図である。図9(c)において、締付工具23は、その一部(凸部)が、押え環4に形成された上述の溝部4fに係合するように構成されている。そのような係合状態で、締付工具23に締付トルクTrを与えればよい。これにより、押え環4が鏡筒2にねじ込まれ、押え環4の当接部4cがレンズ1に当接し、レンズ1は、鏡筒2に押圧され(当接部4cと鏡筒2の当接部2bとの間で挟持され)、鏡筒2により強固に保持される。 Further, FIG. 9 (c) is a diagram showing a tightening tool according to the second embodiment. In FIG. 9C, the tightening tool 23 is configured such that a part (convex portion) thereof engages with the above-mentioned groove portion 4f formed in the holding ring 4. In such an engaged state, the tightening torque Tr may be applied to the tightening tool 23. As a result, the presser ring 4 is screwed into the lens barrel 2, the contact portion 4c of the presser ring 4 abuts on the lens 1, and the lens 1 is pressed against the lens barrel 2 (the contact between the contact portion 4c and the lens barrel 2). It is sandwiched between the contact portion 2b) and is firmly held by the lens barrel 2.

なお、実施例3(図5(d))に関する締付工具は、既述のように、実施例1において示した締付工具20と同様のものとしうる。
なお、締付工具は、専用の工具として例示したが、それには限定されない。使用する押え環に適用できる限りは、汎用の工具を用いうるものである。また、締付トルクTrを与えるための締め付けは、手動または電動等によることができ、適用できる限りは公知のいかなる手段によってもよい。
The tightening tool according to the third embodiment (FIG. 5 (d)) may be the same as the tightening tool 20 shown in the first embodiment as described above.
The tightening tool is exemplified as a dedicated tool, but the tightening tool is not limited thereto. General-purpose tools can be used as long as they are applicable to the holding ring to be used. Further, the tightening for applying the tightening torque Tr can be performed manually or electrically, and as long as it can be applied, any known means may be used.

また、光学素子を保持している装置を製造する以下の方法も有用である。当該方法は、光学素子と、該光学素子を保持する既述の保持装置とを準備する工程を含みうる。当該方法は、さらに、鏡筒に螺合している押え部材を締め付ける締付工具を係合部に係合させて押え部材を締付工具で締め付け、鏡筒の軸の方向において押え部材で光学素子を鏡筒に押圧する工程を含みうる。 In addition, the following method for manufacturing an apparatus holding an optical element is also useful. The method may include the step of preparing an optical element and the above-mentioned holding device for holding the optical element. In this method, a tightening tool for tightening the presser member screwed into the lens barrel is further engaged with the engaging portion, the presser member is tightened with the tightening tool, and the presser member is used for optics in the direction of the axis of the lens barrel. It may include a step of pressing the element against the lens barrel.

2:鏡筒
2a:鏡筒ねじ部
3、4:押え環(押え部材)
3a、4a:押え環ねじ部
3b:穴部(係合部)
3d、4f:溝部(係合部)
3e:突起部(係合部)
U1:光学素子保持装置
2: Lens barrel 2a: Lens barrel screw portion 3, 4: Presser ring (press member)
3a, 4a: Presser ring threaded portion 3b: Hole portion (engaging portion)
3d, 4f: Groove (engagement)
3e: Protrusion (engagement)
U1: Optical element holding device

Claims (10)

光学素子を保持する保持装置であって、
軸を有し、第1ねじ部を含む鏡筒と、
前記第1ねじ部と螺合する第2ねじ部を含み、前記軸の方向において前記光学素子を前記鏡筒に押圧して前記光学素子を押さえる環状の押え部材と、
を有し、
前記押え部材は、前記第1ねじ部と前記第2ねじ部とが互いに螺合している状態で前記押え部材を締め付ける締付工具に係合する係合部が形成され、該係合部は、該係合部の少なくとも一部が、前記軸の方向に直交する方向において前記第2ねじ部の領域に対して反対の領域内に配されるように形成されている、
ことを特徴とする保持装置。
A holding device that holds an optical element.
A lens barrel that has a shaft and includes the first screw portion ,
An annular pressing member including a second screw portion to be screwed with the first screw portion , and pressing the optical element against the lens barrel in the direction of the axis to hold the optical element.
Have,
The presser member is formed with an engaging portion that engages with a tightening tool for tightening the presser member in a state where the first screw portion and the second screw portion are screwed to each other, and the engaging portion is formed. , At least a part of the engaging portion is formed so as to be arranged in a region opposite to the region of the second screw portion in a direction orthogonal to the direction of the axis .
A holding device characterized by that.
前記押え部材は、前記係合部としての穴形成されている、ことを特徴とする請求項1に記載の保持装置。 The holding device according to claim 1, wherein the holding member is formed with a hole as the engaging portion. 前記押え部材は、前記係合部としての溝前記軸の方向に沿って形成されているとを特徴とする請求項1に記載の保持装置。 The holding device according to claim 1, wherein the holding member has a groove as an engaging portion formed along the direction of the shaft. 前記押え部材は、前記第2ねじ部としての雌ねじ含み
前記溝は、前記押え部材の外面に形成されている、
ことを特徴とする請求項3に記載の保持装置。
The presser member includes a female threaded portion as the second threaded portion, and includes a female threaded portion.
The groove is formed on the outer surface of the holding member.
The holding device according to claim 3, wherein the holding device is characterized by the above.
前記押え部材は、前記第2ねじ部としての雄ねじ含み
前記溝は、前記押え部材の内面に形成されている、
ことを特徴とする請求項3に記載の保持装置。
The presser member includes a male screw portion as the second screw portion, and includes a male screw portion.
The groove is formed on the inner surface of the holding member.
The holding device according to claim 3, wherein the holding device is characterized by the above.
前記押え部材は、記係合部としての突起部を含むことを特徴とする請求項1に記載の保持装置。 The holding device according to claim 1, wherein the holding member includes a protrusion as the engaging portion. 前記押え部材は、前記第2ねじ部としての雌ねじ含み
前記突起部は、前記押え部材の外面に含まれている、
ことを特徴とする請求項6に記載の保持装置。
The presser member includes a female threaded portion as the second threaded portion, and includes a female threaded portion.
The protrusion is included on the outer surface of the presser member.
The holding device according to claim 6.
光学素子と、
前記光学素子を保持する請求項1乃至7のうちいずれか1項に記載の保持装置と、
を有することを特徴とする光学装置。
With optical elements
The holding device according to any one of claims 1 to 7, which holds the optical element, and the holding device.
An optical device characterized by having.
前記光学素子を介して形成された像を受ける撮像素子を有することを特徴とする請求項8に記載の光学装置。 The optical device according to claim 8, further comprising an image pickup element that receives an image formed via the optical element. 光学素子を保持している光学装置を製造する方法であって、
前記光学素子と、前記光学素子を保持する請求項1乃至7のうちいずれか1項に記載の保持装置とを準備する工程と、
前記締付工具を前記係合部に係合させて前記押え部材を前記締付工具で締め付け、前記軸の方向において前記押え部材で前記光学素子を前記鏡筒に押圧する工程と、
を含むことを特徴とする方法。
A method of manufacturing an optical device that holds an optical element.
A step of preparing the optical element and the holding device according to any one of claims 1 to 7 for holding the optical element, and a step of preparing the holding device.
A step of engaging the tightening tool with the engaging portion, tightening the pressing member with the tightening tool, and pressing the optical element against the lens barrel with the pressing member in the direction of the axis .
A method characterized by including.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001350073A (en) 2000-06-05 2001-12-21 Ricoh Co Ltd Lens barrel, image forming device, image forming device, image projector and image magnifying device
JP2010054866A (en) 2008-08-28 2010-03-11 Kyocera Corp Lens unit
US20160084281A1 (en) 2014-09-22 2016-03-24 Institut National D'optique Mounting of an optical element in a barrel using a flexible ring

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0736111U (en) * 1993-12-20 1995-07-04 オリンパス光学工業株式会社 Lens holding device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001350073A (en) 2000-06-05 2001-12-21 Ricoh Co Ltd Lens barrel, image forming device, image forming device, image projector and image magnifying device
JP2010054866A (en) 2008-08-28 2010-03-11 Kyocera Corp Lens unit
US20160084281A1 (en) 2014-09-22 2016-03-24 Institut National D'optique Mounting of an optical element in a barrel using a flexible ring

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