JP2005338869A - Method for positioning and fixing two or more lenses in lens barrel and optical equipment applying the same - Google Patents

Method for positioning and fixing two or more lenses in lens barrel and optical equipment applying the same Download PDF

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JP2005338869A
JP2005338869A JP2005187058A JP2005187058A JP2005338869A JP 2005338869 A JP2005338869 A JP 2005338869A JP 2005187058 A JP2005187058 A JP 2005187058A JP 2005187058 A JP2005187058 A JP 2005187058A JP 2005338869 A JP2005338869 A JP 2005338869A
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lens
optical axis
lens barrel
barrel
conical surface
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JP2005338869A5 (en
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Hiroshi Watanabe
浩 渡辺
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Kantatsu Co Ltd
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Kantatsu Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for positioning a lens by which positional relation between the lenses optically or physically facing each other is decided by superposing a plurality of lenses in an optical axis direction while making them abut on each other, and to provide optical equipment applying the method. <P>SOLUTION: A lens barrel 4, a 1st lens 1 being at least two or more lenses housed in the lens barrel and having a conical surface 1b with an optical axis 10 as center at the rib inner wall part of the edge outer periphery part, and a 2nd lens 2 having a conical surface 2a engaged with the conical surface 1b with the optical axis 10 as center at the rib outer wall part of the edge outer periphery part are prepared. The 1st lens 1 is inserted in the lens barrel and positioned in the optical axis direction by abutting on a receiving surface 4a in the lens barrel, and the 2nd lens 2 is inserted in the lens barrel 4 and positioned in the optical axis direction with respect to the optical axis by making the conical surface 1b of the 1st lens 1 abut on the conical surface 2a of the 2nd lens 2. Then, the 2nd lens 2 is fixed in the lens barrel 4, for example, with an adhesive 5 in the vicinity of the insertion part of the lens barrel 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、複数のレンズを光軸方向に互いに当接させて重ね合わせることにより、光学的または物理的に向き合う互いのレンズ間の位置関係を決定することが可能なレンズの位置決め方法並びに該位置決め方法を適用した光学機器に関し、より具体的には、少なくとも二つ以上のレンズを共通の円錐面を介して光軸方向に互いに当接させて二つ以上のレンズ間の光軸及び光軸方向の距離に関する位置関係を決定すること、及び、これら二つ以上のレンズを光学系鏡筒内に位置決め保持した光学機器に関する。   The present invention relates to a lens positioning method capable of determining a positional relationship between optically or physically facing lenses by overlapping a plurality of lenses in contact with each other in the optical axis direction, and the positioning More specifically, the optical apparatus to which the method is applied, and at least two or more lenses are brought into contact with each other in the optical axis direction through a common conical surface, and the optical axis between the two or more lenses and the optical axis direction And an optical apparatus in which these two or more lenses are positioned and held in an optical system barrel.

複数のレンズを鏡筒内に位置決めする場合、従来、互いのレンズの光軸方向の距離は、複数のレンズをその周辺部で光軸方向に互いに当接させて、例えば、レンズコバ付近に設けた平面で当接させたり、マージマルナルコンタクトして当接させたりして決定し、また、互いのレンズにおける光軸の位置合わせは、個々のレンズの外径と該個々のレンズが鏡筒内において鏡筒の内面と当接する部分の鏡筒の内径で決めるか、又は、事前にレンズ同士で光軸調整したものを貼り合わせたりして鏡筒内に納め、これにより、レンズの光軸と光軸方向の距離の位置合わせをするようにしている。   When positioning a plurality of lenses in the lens barrel, conventionally, the distance in the optical axis direction of each lens is provided in the vicinity of the lens edge, for example, by bringing the plurality of lenses into contact with each other in the optical axis direction at the periphery. The position of the optical axis in each lens is determined by contact with a flat surface or contact with a marginal contact. In this case, it is determined by the inner diameter of the lens barrel that is in contact with the inner surface of the lens barrel, or the optical axis adjusted between the lenses in advance is pasted together and placed in the lens barrel. The distance in the optical axis direction is aligned.

図４は、相互のレンズを事前に貼り合わせて鏡筒内に納めるようにした従来の光学系鏡筒の要部断面図で、図中、１，２は事前に貼り合わされたレンズであって、レンズ１は光軸１０に垂直なコバ面１ａと１ｃを有し且つ外周部に光軸１０に平行な面１ｂを有する。また、レンズ２は光軸に垂直なコバ面２ａを有する。４はレンズ１を保持する鏡筒の一部であってレンズ１の受け面４ａを有する。レンズ１，２は鏡筒４へ挿入前に事前にレンズ相互の位置を調整しレンズ１のコバ面１ｃとレンズ２のコバ面２ａを互いに接着剤により接着している。レンズ２が貼り合わせられたレンズ１の当接面１ａは鏡筒４の光軸方向の受け面４ａに当接し、且つレンズ１の外周面１ｂは鏡筒４の内径４ｂに嵌合されている。   FIG. 4 is a cross-sectional view of a main part of a conventional optical lens barrel in which mutual lenses are bonded in advance and placed in the lens barrel. In the figure, reference numerals 1 and 2 denote lenses bonded in advance. The lens 1 has edge surfaces 1a and 1c perpendicular to the optical axis 10 and a surface 1b parallel to the optical axis 10 on the outer periphery. The lens 2 has an edge surface 2a perpendicular to the optical axis. Reference numeral 4 denotes a part of a lens barrel that holds the lens 1 and has a receiving surface 4 a of the lens 1. Before the lenses 1 and 2 are inserted into the lens barrel 4, the positions of the lenses are adjusted in advance, and the edge surface 1c of the lens 1 and the edge surface 2a of the lens 2 are bonded to each other with an adhesive. The contact surface 1 a of the lens 1 to which the lens 2 is bonded is in contact with the receiving surface 4 a in the optical axis direction of the lens barrel 4, and the outer peripheral surface 1 b of the lens 1 is fitted to the inner diameter 4 b of the lens barrel 4. .

図５は、マージナルコンタクト構造を有する従来の光学系鏡筒の要部断面図で、図中、１，２はガラス製のレンズであり、４はレンズ１，２を保持する鏡筒の一部である。レンズ１，２は外周部にそれぞれ光軸１０と平行な面１ａと２ａを有し、鏡筒４も同じく光軸１０と平行な面４ａと４ｂを有し、この部分を嵌合させることによりレンズ１及びレンズ２の中心と光軸１０が一致するように構成されている。また、レンズ１は１８０度より小さな広角のマージナルコンタクト部１ｂを有し、この部分がレンズ２の曲面部と当接し、レンズ１とレンズ２の間隔が決定されている。   FIG. 5 is a cross-sectional view of a main part of a conventional optical barrel having a marginal contact structure, in which 1 and 2 are glass lenses, and 4 is a part of a barrel holding the lenses 1 and 2. It is. The lenses 1 and 2 have surfaces 1a and 2a parallel to the optical axis 10 on the outer peripheral portion, respectively, and the lens barrel 4 also has surfaces 4a and 4b parallel to the optical axis 10 by fitting these portions. The center of the lens 1 and the lens 2 is configured to coincide with the optical axis 10. Further, the lens 1 has a wide-angle marginal contact portion 1b smaller than 180 degrees, and this portion abuts on the curved surface portion of the lens 2, and the distance between the lens 1 and the lens 2 is determined.

図６は、相互のレンズの位置関係を鏡筒を用いて決定する光学系鏡筒の要部断面図で、図中、１，２はレンズで、レンズ１は光軸１０に垂直なコバ面１ａを有し且つ外周部に光軸に平行な面１ｂを有し、同じく、レンズ２も光軸１０に垂直なコバ面２ａを有し外周部には光軸に平行な面２ｂを有する。４はレンズ１，２を保持する鏡筒の一部であってレンズ１の受け面４ａとレンズ２の受け面４ｃを有する。レンズ１は外周面１ｂと鏡筒４の内周面４ｂとを、又、レンズ２は外周面２ｂと鏡筒４の内周面４ｄとをそれぞ係合させることにより、レンズ１，２の中心が光軸１０と一致するように構成されている。また、レンズ１，２が鏡筒４に組み込まれた状態においては、レンズ１のコバ面１ａと鏡筒４の受け面４ａが当接しておりレンズ２のコバ面２ａと鏡筒４の受け面４ｃが当接しており、このことにより、レンズ１，２の位置関係が決定されている。   FIG. 6 is a cross-sectional view of the main part of the optical system barrel that determines the positional relationship between the lenses using a barrel. In the figure, 1 and 2 are lenses, and the lens 1 is a cover surface perpendicular to the optical axis 10. The lens 2 also has a surface 1b parallel to the optical axis, and the lens 2 also has an edge surface 2a perpendicular to the optical axis 10, and has a surface 2b parallel to the optical axis on the outer periphery. Reference numeral 4 denotes a part of a lens barrel that holds the lenses 1 and 2, and includes a receiving surface 4 a of the lens 1 and a receiving surface 4 c of the lens 2. The lens 1 is engaged with the outer peripheral surface 1b and the inner peripheral surface 4b of the lens barrel 4, and the lens 2 is engaged with the outer peripheral surface 2b and the inner peripheral surface 4d of the lens barrel 4, respectively. The center is configured to coincide with the optical axis 10. When the lenses 1 and 2 are incorporated in the lens barrel 4, the edge surface 1 a of the lens 1 and the receiving surface 4 a of the lens barrel 4 are in contact with each other, and the edge surface 2 a of the lens 2 and the receiving surface of the lens barrel 4 are in contact. 4c is in contact, and this determines the positional relationship between the lenses 1 and 2.

図４に示した光学系鏡筒においては、異質材料のレンズ同士を貼り合わせた場合、線膨張係数が異なるため環境温度が変化するとレンズが割れたりレンズ曲面が歪んだりする恐れがある。   In the optical system barrel shown in FIG. 4, when lenses of different materials are bonded together, the linear expansion coefficient is different, and therefore the lens may be broken or the lens curved surface may be distorted when the environmental temperature changes.

図５に示した光学系鏡筒においては、個々のレンズのマージナルコンタクト部と外周の精度及び鏡筒の内径精度を高精度に保つ必要が有る。また、レンズをマージナルコンタクト等により当接させて保持する場合には、マージナルコンタクト部に応力が集中し易いため、マージナルコンタクト構造の光学系にプラスチックなどの比較的低剛性の素材で形成されるレンズを使用すると個々のレンズ外周部の精度と鏡筒の内径精度を保ったとしてもレンズ面が歪み光学性能が劣化してくる等の問題があり、双方のレンズをガラス等の高剛性素材を用いて形成する必要があった。   In the optical system lens barrel shown in FIG. 5, it is necessary to maintain the accuracy of the marginal contact portion and the outer periphery of each lens and the accuracy of the inner diameter of the lens barrel. In addition, when the lens is held in contact with a marginal contact or the like, stress tends to concentrate on the marginal contact portion, so the lens formed of a relatively low rigidity material such as plastic in the optical system of the marginal contact structure. However, there is a problem that the lens surface is distorted and the optical performance deteriorates even if the accuracy of the outer periphery of each lens and the accuracy of the inner diameter of the lens barrel are maintained. It was necessary to form.

また、図６に示した光学系鏡筒においては、レンズの外径と鏡筒の内径を係合させて光軸と垂直方向の位置決めを行っているため、やはり個々のレンズ外周部の精度とコバの厚みの精度及び鏡筒の内径精度を高精度に保つ必要が有り、複数のレンズの光軸を合わせ且つ互いに向き合うレンズの位置関係を決定するためには、個々のレンズの位置決め部位で鏡筒の内径精度とレンズの外径精度の２種類からなる構成部品において精度を保つ必要がある。   Further, in the optical system lens barrel shown in FIG. 6, since the outer diameter of the lens and the inner diameter of the lens barrel are engaged to perform positioning in the direction perpendicular to the optical axis, the accuracy of the outer periphery of each lens is also increased. It is necessary to keep the precision of the edge thickness and the precision of the inner diameter of the lens barrel. In order to determine the positional relationship of the lenses that align the optical axes of a plurality of lenses and face each other, a mirror is used at each lens positioning part. It is necessary to maintain accuracy in the component parts composed of two types of the inner diameter accuracy of the cylinder and the outer diameter accuracy of the lens.

本発明は、上述のごとき実情に鑑みてなされたもので、鏡筒内おいて、最低限１つのレンズ位置を決定すれば次段の光軸方向に重なる複数のレンズの位置関係を決定することができる方法及び該方法を用いた光学機器を提供することを目的としてなされたものである。   The present invention has been made in view of the above-described circumstances, and determines the positional relationship of a plurality of lenses overlapping in the optical axis direction of the next stage if at least one lens position is determined in a lens barrel. And an optical apparatus using the method.

請求項１の発明は、鏡筒と、該鏡筒内に収納される二つ以上のレンズであって、コバ外周部のリブ内壁部に光軸を中心とした円錐面を有する第１のレンズと、コバ外周部のリブ外壁部に光軸を中心として前記円錐面と係合する円錐面を有する第２のレンズとを準備し、前記第１のレンズを前記鏡筒に挿入して該鏡筒内の受け面に当接させて光軸方向に位置決めし、次いで、前記第２のレンズを前記鏡筒に挿入して前記第１のレンズの円錐面と該第２のレンズの円錐面を面当接させて光軸と光軸方向の位置決めをし、次いで、前記第２のレンズを該鏡筒に固定することを特徴としたものである。   The invention according to claim 1 is a first lens having a lens barrel and two or more lenses housed in the lens barrel, and having a conical surface centered on the optical axis at the rib inner wall portion of the outer periphery of the edge. And a second lens having a conical surface that engages with the conical surface with the optical axis as a center at a rib outer wall portion of the outer peripheral portion of the edge, and the first lens is inserted into the lens barrel and the mirror Abutting on the receiving surface in the tube and positioning in the optical axis direction, and then inserting the second lens into the lens barrel and connecting the conical surface of the first lens and the conical surface of the second lens The surface is brought into contact with the optical axis and positioned in the optical axis direction, and then the second lens is fixed to the barrel.

請求項２の発明は、鏡筒と、該鏡筒内に挿入配設された二つ以上のレンズとから成り、第１のレンズはコバ外周部のリブ内壁に光軸を中心とした円錐面を有し、第２のレンズはコバ外周部のリブ外壁部に光軸を中心としかつ前記円錐面と係合する円錐面を有し、前記第１のレンズの円錐面と第２のレンズの円錐面が面当接して前記鏡筒内に収納され、前記第２のレンズが該鏡筒に固定されていることを特徴としたものである。   The invention of claim 2 comprises a lens barrel and two or more lenses inserted and arranged in the lens barrel, and the first lens is a conical surface centered on the optical axis on the rib inner wall of the outer periphery of the edge. And the second lens has a conical surface centered on the optical axis and engaged with the conical surface on the rib outer wall portion of the outer periphery of the edge, and the conical surface of the first lens and the second lens The conical surface comes into surface contact and is housed in the lens barrel, and the second lens is fixed to the lens barrel.

請求項３の発明は、請求項２の発明において、更にコバ外周部のリブ外壁部に光軸を中心とする円錐面を有する第３のレンズを有し、前記第２のレンズは前記円錐面が設けられている側と反対側においてコバ外周部のリブ内壁部に前記第３のレンズの円錐面と係合する第２の円錐面を有し、該第２の円錐面が前記第３のレンズの円錐面と面当接して前記鏡筒内に収納され、該第３のレンズが前記第２のレンズに代って前記鏡筒に固定されていることを特徴としたものである。   The invention of claim 3 is the invention of claim 2, further comprising a third lens having a conical surface centered on the optical axis at the rib outer wall portion of the outer periphery of the edge, and the second lens is the conical surface. The rib inner wall portion of the outer peripheral portion has a second conical surface that engages with the conical surface of the third lens on the side opposite to the side where the third conical surface is provided, and the second conical surface is the third conical surface. The third lens is fixed to the lens barrel in place of the second lens, while being in surface contact with the conical surface of the lens and housed in the lens barrel.

請求項４の発明は、請求項２又は３の発明において、前記第１のレンズは光軸方向においてのみ前記鏡筒の受け面に当接し、径方向にはクリアランスを有することを特徴としたものである。   According to a fourth aspect of the invention, in the second or third aspect of the invention, the first lens abuts on the receiving surface of the barrel only in the optical axis direction and has a clearance in the radial direction. It is.

請求項５の発明は、請求項２乃至４のいずれかの発明において、前記円錐面は、前記レンズのコバ円周方向の一部分、又は、複数箇所、又は、全周に設けられていることを特徴としたものである。   According to a fifth aspect of the present invention, in the invention according to any one of the second to fourth aspects, the conical surface is provided in a part, a plurality of locations, or the entire circumference of the edge of the lens in the circumferential direction. It is a feature.

請求項６の発明は、請求項２乃至５のいずれかの発明において、前記第２のレンズ又は第３のレンズが前記鏡筒の内壁に接着剤で固定されていることを特徴としたものである。   The invention of claim 6 is characterized in that, in the invention of any one of claims 2 to 5, the second lens or the third lens is fixed to the inner wall of the lens barrel with an adhesive. is there.

本発明のレンズ位置決め方法によれば、コバ外周部のリブ内壁部に光軸を中心とした円錐の面を有するレンズを鏡筒内の受け面に当接させて、次いで、この鏡筒の内部にコバ外周部のリブ外壁部に光軸を中心とした円錐の面を有する次段のレンズを挿入することで、レンズ相互間の光軸と光軸方向における距離の位置関係を同時に決定出来、レンズ相互の位置調整や鏡筒の内径精度を不要とすることができ、接着剤等による固定方法においても、レンズの光学性能の劣化を防止することができる。   According to the lens positioning method of the present invention, a lens having a conical surface centered on the optical axis is brought into contact with the receiving surface in the lens barrel on the rib inner wall portion of the outer periphery of the edge, and then the interior of the lens barrel is By inserting the next stage lens having a conical surface centered on the optical axis into the rib outer wall of the outer edge of the edge, the positional relationship between the optical axis between the lenses and the distance in the optical axis direction can be determined simultaneously. Position adjustment between the lenses and accuracy of the inner diameter of the lens barrel can be eliminated, and deterioration of the optical performance of the lens can be prevented even in a fixing method using an adhesive or the like.

また、本発明の光学系位置決め方法が適用される光学機器では、一段めのレンズが鏡筒の受け面に当接した状態で鏡筒の内部に位置され、次段のレンズは一段めのレンズのコバ外周部の円錐斜面に光軸方向に当接した状態で上記鏡筒の内部に位置決めされ、且つ、当該鏡筒の挿入部位で接着剤により上記鏡筒に接着固定されているので、複数のレンズを保持する鏡筒に容易に組み込むことができ、しかも、これらのレンズは光学性能の劣化を生ずることなく、高い信頼性で位置決め、固定されている。   In the optical apparatus to which the optical system positioning method of the present invention is applied, the first lens is positioned inside the lens barrel in contact with the receiving surface of the lens barrel, and the next lens is the first lens. Are positioned inside the lens barrel in contact with the conical slope of the outer peripheral portion of the edge in the optical axis direction, and are fixedly bonded to the lens barrel by an adhesive at the insertion site of the lens barrel. These lenses can be easily incorporated into a lens barrel that holds these lenses, and these lenses are positioned and fixed with high reliability without causing deterioration of optical performance.

本発明は、鏡筒内に二つ以上のレンズを位置決め固定する方法、より具体的には、光学系鏡筒内におけるレンズ同士間の位置決め方法、及び、該位置決め方法を適用した光学系鏡筒に関するもので、光軸方向に互いに当接する少なくとも二つ以上のレンズを有する光学系鏡筒内におけるレンズ位置決め方法であって、レンズを鏡筒の内部に挿入し、このレンズを上記鏡筒内の受け面に当接させて光軸方向に位置決めした状態にし、このレンズに次段のレンズを当接させることにより互いに向き合うレンズの光軸と光軸方向の距離を位置決めし、鏡筒の挿入部付近で接着剤又は溶着により固定あるいは最終段レンズのコバ外周部を弾性体で光軸方向に加圧することで各レンズ同士の位置を保持するようにしたものである。   The present invention relates to a method for positioning and fixing two or more lenses in a lens barrel, more specifically, a positioning method between lenses in an optical system barrel, and an optical system barrel to which the positioning method is applied. A lens positioning method in an optical system barrel having at least two or more lenses in contact with each other in the optical axis direction, wherein the lens is inserted into the barrel, and the lens is placed in the barrel The lens is placed in contact with the receiving surface and positioned in the optical axis direction, and the lens in the next stage is contacted with this lens to position the optical axis of the lens facing each other and the distance in the optical axis direction. The positions of the lenses are held by being fixed by an adhesive or welding in the vicinity, or by pressing the outer peripheral part of the edge of the last stage lens with an elastic body in the optical axis direction.

図３は、本発明が適用されるコバ外周のリブ面を説明するための図で、図中、１０は光軸、１１は該光軸１０を中心とした円錐、１２は該円錐１０の面の一部を示し、本発明は、この円錐１０の面の一部１２を介して２つのレンズを当接することにより、二つ以上のレンズの光軸合わせと光軸方向の距離合わせを同時に行うようにしたものである。   FIG. 3 is a view for explaining the rib surface on the outer periphery of the edge to which the present invention is applied. In the figure, 10 is an optical axis, 11 is a cone centered on the optical axis 10, and 12 is a surface of the cone 10. In the present invention, the two lenses are brought into contact with each other via a part 12 of the surface of the cone 10 to simultaneously adjust the optical axes of two or more lenses and the distance in the optical axis direction. It is what I did.

図１は、本発明の実施例１を説明するための要部断面構成図で、図中、１，２は合成樹脂製のレンズ、４はレンズ１，２を保持する鏡筒である。レンズ１はコバ外周部のリブ内壁部に、光軸１０を中心とした円錐１１の面１ｂを有し、レンズ２はコバ外周部のリブ外壁部に、光軸１０を中心としレンズ１と同じ円錐１１の面２ａを有し、互いの円錐となる面１ｂと２ａが面当接し、鏡筒４の中に納まっている。５はレンズ２と鏡筒４を固定する接着剤で、レンズ１と鏡筒４は、図１に示すように、光軸１０方向においてのみレンズ１の面１ａと鏡筒４の受け面４ａが当接し、光軸１０と垂直方向（径方向）には僅かにクリアランスを有している。   FIG. 1 is a cross-sectional view of a principal part for explaining the first embodiment of the present invention. In the figure, reference numerals 1 and 2 denote lenses made of synthetic resin, and reference numeral 4 denotes a lens barrel for holding the lenses 1 and 2. The lens 1 has a surface 1b of a cone 11 centered on the optical axis 10 on the rib inner wall of the outer periphery of the edge, and the lens 2 is the same as the lens 1 centered on the optical axis 10 of the rib outer wall of the outer periphery of the edge. A surface 2 a of the cone 11 is provided, and the surfaces 1 b and 2 a that are the cones of each other are in surface contact with each other and are contained in the lens barrel 4. Reference numeral 5 denotes an adhesive for fixing the lens 2 and the lens barrel 4. As shown in FIG. 1, the lens 1 and the lens barrel 4 have a surface 1a of the lens 1 and a receiving surface 4a of the lens barrel 4 only in the optical axis 10 direction. It abuts and has a slight clearance in the direction perpendicular to the optical axis 10 (radial direction).

上記実施例におけるレンズ位置決め保持方法としては、先ず、レンズ１を鏡筒４の右側より鏡筒４内に挿入し、次に、次段のレンズ２を同じく鏡筒４の右側より鏡筒４内に挿入する。このとき、レンズ１，２をその外周部で鏡筒４に嵌合させたり圧入したりするとレンズ１，２に変形を生じる恐れが大きいので、レンズ１，２の外径は鏡筒４の内径より小さく設定してある。このため、鏡筒４内にレンズ１，２をその順に挿入し、レンズ２のコバ外周部に図の右方向より荷重を加えると、レンズ１の受け面１ｂがレンズ２の受け面２ａに規制され、レンズ１は光軸１０と垂直の方向へ移動しレンズ１，２の中心が光軸１０と一致した状態となる。その後、鏡筒４の挿入部に接着剤５を注入してレンズ２のコバ外周部と鏡筒４とを固定することにより、図１に示す状態を得る。   As the lens positioning and holding method in the above embodiment, first, the lens 1 is inserted into the lens barrel 4 from the right side of the lens barrel 4, and then the next stage lens 2 is similarly inserted into the lens barrel 4 from the right side of the lens barrel 4. Insert into. At this time, if the lenses 1 and 2 are fitted or pressed into the lens barrel 4 at the outer periphery thereof, the lenses 1 and 2 are likely to be deformed. Therefore, the outer diameter of the lenses 1 and 2 is the inner diameter of the lens barrel 4. It is set smaller. For this reason, when the lenses 1 and 2 are inserted into the lens barrel 4 in that order and a load is applied to the edge of the edge of the lens 2 from the right in the figure, the receiving surface 1b of the lens 1 is restricted to the receiving surface 2a of the lens 2. Then, the lens 1 moves in a direction perpendicular to the optical axis 10 and the centers of the lenses 1 and 2 are aligned with the optical axis 10. Then, the state shown in FIG. 1 is obtained by injecting the adhesive 5 into the insertion portion of the lens barrel 4 and fixing the outer periphery of the lens 2 and the lens barrel 4.

上述のごとき構成のレンズ位置決め保持によると、レンズ１は接着剤５等により鏡筒４に直接固定されていないが、レンズ２のコバ部の円錐斜面２ａと鏡筒４の受け面４ａに挟み込まれているため、その位置がずれることはない。尚、レンズ１は接着されておらず、レンズ２の接着部分は、表面距離においてレンズ部分から離れた部分に設けられているため、接着剤５の収縮によりレンズ２が変形するのを防止できる効果がある。従って、接着剤５の硬化時の収縮によりレンズ２が引張られ、その位置がずれて光学性能が劣化することはない。また、鏡筒４はレンズ１の光軸１０と垂直な面１ａの受け面４ａを有し、この受け面４ａは光軸１０に対し垂直となる面に形成してある。   According to the lens positioning and holding as described above, the lens 1 is not directly fixed to the lens barrel 4 by the adhesive 5 or the like, but is sandwiched between the conical slope 2a of the edge portion of the lens 2 and the receiving surface 4a of the lens barrel 4. Therefore, the position does not shift. In addition, since the lens 1 is not bonded and the bonded portion of the lens 2 is provided at a portion away from the lens portion at the surface distance, the lens 2 can be prevented from being deformed due to the shrinkage of the adhesive 5. There is. Therefore, the lens 2 is pulled by the shrinkage at the time of curing of the adhesive 5, and the optical performance is not deteriorated by shifting its position. The lens barrel 4 has a receiving surface 4 a that is a surface 1 a perpendicular to the optical axis 10 of the lens 1, and the receiving surface 4 a is formed on a surface that is perpendicular to the optical axis 10.

上述のごときレンズ相互間の位置決め方法によれば、レンズは鏡筒に対し嵌合を行うことなしに１段目のレンズと次段目のレンズを鏡筒内にその順に挿入するだけで互いのレンズの光軸と距離を決めることができ、相互のレンズを直接貼り合わせたり鏡筒側の内径精度を保つ必要がない上、高精度でレンズ相互間の光軸と位置関係を同時に位置決めできるという効果が得られる。   According to the positioning method between the lenses as described above, the lenses can be connected to each other only by inserting the first-stage lens and the next-stage lens into the lens barrel in that order without engaging the lens barrel. It is possible to determine the optical axis and distance of the lens, and it is not necessary to stick each other's lens directly or to maintain the inner diameter accuracy of the lens barrel side, and it is possible to position the optical axis and the positional relationship between the lenses simultaneously with high accuracy. An effect is obtained.

図２は、本発明の実施例２を説明するための要部断面構成図で、図中、１，２，３は合成樹脂製のレンズ、４はレンズ１，２，３を保持する鏡筒である。レンズ１は、コバ外周部のリブ内壁部に光軸１０を中心とした円錐１１１の面１ｂを有し、レンズ２は、コバ外周部のリブ外壁部に光軸１０を中心とし、レンズ１と同じ円錐１１1の面２ａを有し、且つ、該面２ａと反対側において、コバ外周部のリブ内壁部に光軸１０を中心とした円錐１１2の面２ｂを有し、レンズ３は、レンズ２と同じく、コバ外周部のリブ内壁部に光軸１０を中心とした円錐１１2の面３ａを有し且つ内周部には光軸１０を中心とした円錐１１3の面３ｂを有している。レンズ１，２，３は互いのコバの円錐となる面が互いに当接し鏡筒４の中に納まっている。 FIG. 2 is a cross-sectional view of a main part for explaining a second embodiment of the present invention, in which 1, 2, 3 are lenses made of synthetic resin, and 4 is a lens barrel holding the lenses 1, 2, 3. It is. Lens 1 has a conical 11 1 surface 1b around the optical axis 10 to the rib inner wall of the flange outer peripheral portion, the lens 2, the optical axis 10 as the center to the rib outer wall of the flange outer peripheral portion, the lens 1 It has the same cone 11 first surface 2a and, and on the opposite side of said surface 2a, has a conical 11 2 face 2b around the optical axis 10 to the rib inner wall of the flange outer peripheral portion, the lens 3 Like the lens 2, the rib inner wall portion of the outer peripheral portion has a surface 3 a of the cone 11 2 centered on the optical axis 10 and the inner peripheral portion has a surface 3 b of the cone 11 3 centered on the optical axis 10. Have. The lenses 1, 2, and 3 are accommodated in the lens barrel 4 so that the surfaces that form the cones of the edges contact each other.

図２において、レンズ１と鏡筒４は、光軸１０方向においてのみレンズ１の面１ａと鏡筒４の受け面４ａが当接し光軸１０と垂直方向には僅かにクリアランスを有している。本実施形態におけるレンズ位置決め保持方法としては、先ず、レンズ１を鏡筒４の右側より鏡筒４内に挿入し、次に、次段のレンズ２，３を同じく鏡筒４の右側よりそれぞれの順に鏡筒４内に挿入する。このとき、レンズ１，２，３をその外周部で鏡筒４に嵌合させたり圧入したりするとレンズ１，２，３に変形を生じる恐れが大きいので、レンズ１，２，３の外径は鏡筒４の内径より小さく設定してある。このため、鏡筒４を固定し、レンズ３のコバ外周部に右側より荷重を加えるとレンズ１，２が鏡筒４の受け面４ａとレンズ３のコバ斜面３ａに規制され、レンズ１，２，３の中心が光軸１０と一致した状態となる。そして、鏡筒４の挿入部に接着剤５を注入しレンズ３のコバ外周部と鏡筒４とを固定することにより、図２に示す状態を得る。   In FIG. 2, the lens 1 and the lens barrel 4 are in contact with the surface 1 a of the lens 1 and the receiving surface 4 a of the lens barrel 4 only in the direction of the optical axis 10, and have a slight clearance in the direction perpendicular to the optical axis 10. . As a lens positioning and holding method in the present embodiment, first, the lens 1 is inserted into the lens barrel 4 from the right side of the lens barrel 4, and then the next stage lenses 2 and 3 are respectively inserted from the right side of the lens barrel 4. It inserts in the lens-barrel 4 in order. At this time, if the lenses 1, 2, 3 are fitted or pressed into the lens barrel 4 at the outer periphery, the lenses 1, 2, 3 are likely to be deformed. Is set smaller than the inner diameter of the lens barrel 4. For this reason, when the lens barrel 4 is fixed and a load is applied to the outer peripheral portion of the edge of the lens 3 from the right side, the lenses 1 and 2 are regulated by the receiving surface 4a of the lens barrel 4 and the edge inclined surface 3a of the lens 3. , 3 coincide with the optical axis 10. Then, the state shown in FIG. 2 is obtained by injecting the adhesive 5 into the insertion portion of the lens barrel 4 and fixing the outer peripheral portion of the lens 3 and the lens barrel 4.

上述のごとき構成のレンズ位置決め保持によると、レンズ１，２は接着剤５等により鏡筒４に直接固定されてはいないが、レンズ３のコバ部の円錐斜面３ａと鏡筒４の受け面４ａに挟み込まれているため、その位置がずれることはない。なお、レンズ１，２は接着されておらず、レンズ３の接着部分は表面距離においてはレンズ部分から離れた部分に設けてあるため、接着剤５の収縮によりレンズ３が変形するのを防止できる効果がある。従って、接着剤５の硬化時の収縮によりレンズ３が引張られその位置がずれて光学性能が劣化することはない。鏡筒４は、図２に示すように、レンズ１の光軸１０と垂直な面１ａの受け面４ａを有し、この受け面４ａは光軸１０に対し垂直となる面に形成してある。このように、レンズコバのリブ内外周部に光軸を中心とした円錐の斜面を設けることで、複数のレンズを多段階に当接させレンズ間の光軸と位置関係を同時に決めることが出来る。   According to the lens positioning and holding configuration as described above, the lenses 1 and 2 are not directly fixed to the lens barrel 4 by the adhesive 5 or the like, but the conical slope 3a at the edge of the lens 3 and the receiving surface 4a of the lens barrel 4. The position is not shifted because it is sandwiched between the two. The lenses 1 and 2 are not bonded, and the bonding portion of the lens 3 is provided at a portion away from the lens portion in terms of the surface distance, so that the lens 3 can be prevented from being deformed by the shrinkage of the adhesive 5. effective. Therefore, the lens 3 is pulled by the shrinkage when the adhesive 5 is cured, and the position thereof is not shifted and the optical performance is not deteriorated. As shown in FIG. 2, the lens barrel 4 has a receiving surface 4 a of a surface 1 a perpendicular to the optical axis 10 of the lens 1, and the receiving surface 4 a is formed on a surface perpendicular to the optical axis 10. . In this way, by providing a conical inclined surface with the optical axis as the center on the inner and outer peripheral portions of the ribs of the lens edge, a plurality of lenses can be contacted in multiple stages, and the optical axis and the positional relationship between the lenses can be determined simultaneously.

上述の各実施例に示した光学系鏡筒内のレンズ位置決めによれば、複数のレンズを鏡筒に容易に組み込むことができる上、これらの組み込まれた最終段のレンズを鏡筒に接着剤等で固定したとしても、光学性能の劣化を生ずることなく高い信頼性で位置決めし固定することができる。また、このような構成の位置決めは、写真用カメラや光学測定器等の光学機器に用いることができる。   According to the lens positioning in the optical system barrel shown in each of the above-described embodiments, a plurality of lenses can be easily incorporated into the barrel, and the last stage of the incorporated lenses is attached to the barrel. Even if it is fixed by, etc., it can be positioned and fixed with high reliability without causing deterioration of optical performance. In addition, the positioning of such a configuration can be used for an optical apparatus such as a photographic camera or an optical measuring instrument.

以上に、本発明の実施例について説明したが、本発明は前述の実施例に限定されるものではなく、実際の製品開発において、種々の設計変更が可能であり、鏡筒に組み込むレンズの数を更に多くすることもできる。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made in actual product development, and the number of lenses incorporated in the lens barrel. Can be further increased.

本発明が適用された鏡筒の実施例１を説明するための要部断面図である。It is principal part sectional drawing for demonstrating Example 1 of the lens-barrel to which this invention was applied. 本発明が適用された鏡筒の実施例２を説明するための要部断面図である。It is principal part sectional drawing for demonstrating Example 2 of the lens-barrel to which this invention was applied. 本発明によるレンズ位置決め方法に用いられる円錐面（リブ面）を説明するための図である。It is a figure for demonstrating the conical surface (rib surface) used for the lens positioning method by this invention. 相互のレンズを事前に貼り合わせて鏡筒内に納めるようにした従来の光学系鏡筒の要部断面図である。It is principal part sectional drawing of the conventional optical system lens barrel which mutually affixed the lens in advance and made it fit in a lens barrel. マージナルコンタクト構造を有する従来の光学系鏡筒の要部断面図である。It is principal part sectional drawing of the conventional optical system barrel which has a marginal contact structure. 相互のレンズの位置関係を鏡筒を用いて決定する光学系鏡筒の要部断面図である。It is principal part sectional drawing of the optical system barrel which determines the positional relationship of a mutual lens using a barrel.

符号の説明Explanation of symbols

１，２，３ レンズ
４ 鏡筒
５ 接着剤
１０ 光軸
１１，１１1，１１2，１１3 円錐面
1, 2, 3 Lens 4 Lens barrel 5 Adhesive 10 Optical axis 11, 11 1 , 11 2 , 11 3 Conical surface

Claims (6)

鏡筒と、該鏡筒内に収納される二つ以上のレンズであって、コバ外周部のリブ内壁部に光軸を中心とした円錐面を有する第１のレンズと、コバ外周部のリブ外壁部に光軸を中心として前記円錐面と係合する円錐面を有する第２のレンズとを準備し、前記第１のレンズを前記鏡筒に挿入して該鏡筒内の受け面に当接させて光軸方向に位置決めし、次いで、前記第２のレンズを前記鏡筒に挿入して前記第１のレンズの円錐面と該第２のレンズの円錐面を面当接させて光軸と光軸方向の位置決めをし、次いで、前記第２のレンズを該鏡筒に固定することを特徴とする鏡筒内に二つ以上のレンズを位置決め固定する方法。   A lens barrel, two or more lenses housed in the lens barrel, the first lens having a conical surface centered on the optical axis at the rib inner wall portion of the outer periphery of the edge, and the rib of the outer periphery of the edge A second lens having a conical surface that engages with the conical surface about the optical axis is prepared on the outer wall, and the first lens is inserted into the lens barrel so as to contact the receiving surface in the lens barrel. Then, the second lens is inserted into the lens barrel, and the conical surface of the first lens and the conical surface of the second lens are brought into surface contact with each other. And positioning the two or more lenses in the lens barrel, wherein the second lens is fixed to the lens barrel. 鏡筒と、該鏡筒内に挿入配設された二つ以上のレンズとから成り、第１のレンズはコバ外周部のリブ内壁に光軸を中心とした円錐面を有し、第２のレンズはコバ外周部のリブ外壁部に光軸を中心としかつ前記円錐面と係合する円錐面を有し、前記第１のレンズの円錐面と第２のレンズの円錐面が面当接して前記鏡筒内に収納され、前記第２のレンズが該鏡筒に固定されていることを特徴とする光学機器。   The lens comprises a lens barrel and two or more lenses inserted and disposed in the lens barrel. The first lens has a conical surface centered on the optical axis on the rib inner wall of the outer periphery of the edge. The lens has a conical surface centered on the optical axis and engaged with the conical surface on the rib outer wall portion of the outer periphery of the edge, and the conical surface of the first lens and the conical surface of the second lens are in surface contact with each other. An optical apparatus housed in the lens barrel, wherein the second lens is fixed to the lens barrel. 請求項２に記載の光学機器において、更にコバ外周部のリブ外壁部に光軸を中心とする円錐面を有する第３のレンズを有し、前記第２のレンズは前記円錐面が設けられている側と反対側においてコバ外周部のリブ内壁部に前記第３のレンズの円錐面と係合する第２の円錐面を有し、該第２の円錐面が前記第３のレンズの円錐面と面当接して前記鏡筒内に収納され、該第３のレンズが前記第２のレンズに代って前記鏡筒に固定されていることを特徴とする光学機器。   3. The optical apparatus according to claim 2, further comprising a third lens having a conical surface centered on the optical axis at a rib outer wall portion of the outer peripheral portion of the edge, wherein the second lens is provided with the conical surface. A rib conical surface engaging with the conical surface of the third lens on the rib inner wall portion of the outer periphery of the edge on the side opposite to the side where the conical surface is located, and the second conical surface is a conical surface of the third lens And an optical device in which the third lens is fixed to the lens barrel in place of the second lens. 前記第１のレンズは光軸方向においてのみ前記鏡筒の受け面に当接し、径方向にはクリアランスを有することを特徴とする請求項２又は３に記載の光学機器。   4. The optical apparatus according to claim 2, wherein the first lens contacts the receiving surface of the barrel only in the optical axis direction and has a clearance in the radial direction. 前記円錐面は、前記レンズのコバ円周方向の一部分、又は、複数箇所、又は、全周に設けられていることを特徴とする請求項２乃至４のいずれかに記載の光学機器。   5. The optical apparatus according to claim 2, wherein the conical surface is provided in a part, a plurality of locations, or the entire circumference of the lens in a circumferential direction of the lens. 前記第２のレンズ又は第３のレンズが前記鏡筒の内壁に接着剤で固定されていることを特徴とする請求項２乃至５のいずれかに記載の光学機器。
6. The optical apparatus according to claim 2, wherein the second lens or the third lens is fixed to an inner wall of the barrel with an adhesive.
JP2005187058A 2005-06-27 2005-06-27 Method for positioning and fixing two or more lenses in lens barrel and optical equipment applying the same Pending JP2005338869A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008026548A (en) * 2006-07-20 2008-02-07 Alps Electric Co Ltd Lens holder
WO2008096822A1 (en) * 2007-02-09 2008-08-14 Sharp Kabushiki Kaisha Plastic lens unit, camera module, and their manufacturing method
JP2010054866A (en) * 2008-08-28 2010-03-11 Kyocera Corp Lens unit
JP2013246427A (en) * 2012-05-29 2013-12-09 Sharp Corp Lens, lens unit and lens array
TWI447460B (en) * 2010-06-28 2014-08-01 Hon Hai Prec Ind Co Ltd Lens barrel and lens module
CN112526693A (en) * 2019-09-02 2021-03-19 三星电机株式会社 Camera module

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JPH06507739A (en) * 1991-05-08 1994-09-01 イーストマン・コダック・カンパニー Accurate restraint devices and methods for mounting elements such as lenses
JPH09113783A (en) * 1995-10-19 1997-05-02 Canon Inc Lens holding barrel and optical equipment using the same
JPH10274706A (en) * 1997-03-31 1998-10-13 Minolta Co Ltd Diffractive optical element

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JPS56149010A (en) * 1980-04-21 1981-11-18 Konishiroku Photo Ind Co Ltd Plastic lens
JPS62153908A (en) * 1985-12-27 1987-07-08 Ricoh Co Ltd Lens unit
JPH01101214U (en) * 1987-12-25 1989-07-07
JPH06507739A (en) * 1991-05-08 1994-09-01 イーストマン・コダック・カンパニー Accurate restraint devices and methods for mounting elements such as lenses
JPH09113783A (en) * 1995-10-19 1997-05-02 Canon Inc Lens holding barrel and optical equipment using the same
JPH10274706A (en) * 1997-03-31 1998-10-13 Minolta Co Ltd Diffractive optical element

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008026548A (en) * 2006-07-20 2008-02-07 Alps Electric Co Ltd Lens holder
WO2008096822A1 (en) * 2007-02-09 2008-08-14 Sharp Kabushiki Kaisha Plastic lens unit, camera module, and their manufacturing method
JP2008197282A (en) * 2007-02-09 2008-08-28 Sharp Corp Plastic lens unit, camera module and method for manufacturing them
JP2010054866A (en) * 2008-08-28 2010-03-11 Kyocera Corp Lens unit
TWI447460B (en) * 2010-06-28 2014-08-01 Hon Hai Prec Ind Co Ltd Lens barrel and lens module
JP2013246427A (en) * 2012-05-29 2013-12-09 Sharp Corp Lens, lens unit and lens array
CN112526693A (en) * 2019-09-02 2021-03-19 三星电机株式会社 Camera module
US11640100B2 (en) 2019-09-02 2023-05-02 Samsung Electro-Mechanics Co., Ltd. Camera module

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