JP2007139947A

JP2007139947A - Lens barrel, imaging apparatus, and axis alignment method for lens

Info

Publication number: JP2007139947A
Application number: JP2005331380A
Authority: JP
Inventors: Kazuhiro Hattori; 和広服部
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 2005-11-16
Filing date: 2005-11-16
Publication date: 2007-06-07

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens barrel advantageous for reducing cost, compacting size and enhancing the efficiency of adjustment work and also advantageous for preventing degradation in the optical characteristics of a photographing optical system. <P>SOLUTION: The lens barrel includes a lens-barrel-side mounting section 54; a lens-frame-side mounting section 52 corresponding to the lens-barrel-side mounting section 54; and axis alignment pin mounting sections 56 formed in a space 55 between the mounting sections 52 and 54. Each axis alignment pin 58 is disposed in the corresponding axis alignment pin mounting section 56. A cam face 5404 is formed in the part where the lens-barrel-side mounting section 54 faces the space 55. One end of each axis alignment pin 58 is supported by the lens-barrel-side mounting section 54 and the other end by the lens-frame-side mounting section 52 so that the axis alignment pin 58 is rotatable. A flange 5806 is located in the space 55. A cam mechanism is composed such that the lens frame 44 is displaced in a direction perpendicular to the optical axis of the photographing optical system 24 by the cam face 5404 and the axis alignment pin 58. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明はレンズ鏡筒および撮像装置並びにレンズの調芯方法に関する。 The present invention relates to a lens barrel, an imaging apparatus, and a lens alignment method.

デジタルスチルカメラやデジタルビデオカメラ等の撮像装置にはレンズ鏡筒が設けられており、レンズ鏡筒は、撮影光学系を構成する複数のレンズと、それらレンズが取着される鏡筒を有している。
レンズの鏡筒への取着に際しては、撮影光学系の光学特性が最良となるようにレンズの位置決め、すなわち調芯作業を行うことが必要となる。
従来、レンズを調芯するための機構としては、例えば、図１８に示すように、レンズ２の外周面の３箇所と鏡筒（不図示）との間にそれぞれレンズ２の半径方向に延在する引っ張りコイルばね４Ａを連結するとともに、２つのコイルばね４Ａの鏡筒側の端部をレンズ２の半径方向に移動させる調整部材４Ｂを設けたものが提案されている（特許文献１参照）。
この調芯機構では２つの調整部材４Ｂを動かすことでレンズ２を撮影光学系の光軸と直交する方向に移動させて調芯を行っている。
また、図１９（Ａ）に示すように、レンズ２の外周面に環状の調芯リング６を設け、この調芯リング６の外周面にレンズ２の中心軸に対して傾斜する第１の嵌合面６Ａを設け、この嵌合面６Ａと嵌合可能な第２の嵌合面８Ａを鏡筒８の前端内周に設け、レンズ２の外周面に対して調芯リング６を傾動可能に取り付けたものが提案されている（特許文献２参照）。
この調芯機構では、図１９（Ｂ）、（Ｃ）に示すように、調芯リング６の中心軸をレンズ２の中心軸に対して傾斜させて第１の嵌合面６Ａと第２の嵌合面８Ａとの嵌合箇所を変化させることにより、レンズ２を撮影光学系の光軸と直交する方向に移動させて調芯を行っている。
特開２００２-１９６２０６号公報特開２００１−３４３５７４号公報 An imaging apparatus such as a digital still camera or a digital video camera is provided with a lens barrel. The lens barrel includes a plurality of lenses constituting a photographing optical system and a lens barrel to which these lenses are attached. ing.
When attaching the lens to the lens barrel, it is necessary to position the lens, that is, to align the lens so that the optical characteristics of the photographic optical system are optimal.
Conventionally, as a mechanism for aligning the lens, for example, as shown in FIG. 18, the lens 2 extends in the radial direction of the lens 2 between three positions on the outer peripheral surface of the lens 2 and a lens barrel (not shown). There has been proposed one in which a tension coil spring 4A is connected and an adjustment member 4B is provided for moving the end portions on the lens barrel side of the two coil springs 4A in the radial direction of the lens 2 (see Patent Document 1).
In this alignment mechanism, the lens 2 is moved in a direction orthogonal to the optical axis of the photographing optical system by moving the two adjustment members 4B to perform alignment.
Further, as shown in FIG. 19A, an annular alignment ring 6 is provided on the outer peripheral surface of the lens 2, and a first fitting that is inclined with respect to the central axis of the lens 2 is provided on the outer peripheral surface of the alignment ring 6. A mating surface 6A is provided, and a second fitting surface 8A that can be fitted to the fitting surface 6A is provided on the inner periphery of the front end of the lens barrel 8, so that the alignment ring 6 can be tilted with respect to the outer peripheral surface of the lens 2. An attached one has been proposed (see Patent Document 2).
In this alignment mechanism, as shown in FIGS. 19B and 19C, the center axis of the alignment ring 6 is inclined with respect to the center axis of the lens 2, and the first fitting surface 6A and the second fitting surface 6 By changing the fitting location with the fitting surface 8A, the lens 2 is moved in the direction perpendicular to the optical axis of the photographing optical system for alignment.
Japanese Patent Laid-Open No. 2002-196206 JP 2001-343574 A

しかしながら、前者のコイルばね４Ａと調整部材４Ｂを用いる構成では、部品点数が多く構成が複雑であるため、部品コストや調整コストがかかり、コストダウンを図る上で不利があり、また、コイルばね４Ａと調整部材４Ｂの配設スペースを確保しなくてはならないため、コンパクト化を図る上で不利がある。
また、後者の調芯リング６を用いる構成では、調芯リング６を把持した作業者の手が撮影光学系２４の光軸上に位置して光束を遮ってしまうため調整作業の効率化を図る上で不利がある。
また、調芯が終了した後、レンズ２の位置を固定するために、調芯リング６の全周とレンズ２および鏡筒８の全周との間を接着剤を塗布する必要があり、接着剤の量が多く、接着剤の硬化時間がかかり、接着作業の効率化を図る上で不利がある。
また、調芯リング６はレンズ２の外周にわたって延在する大きさを有し重量があるため、レンズ鏡筒に衝撃が加わった際に、調芯リング６の位置ずれが生じやすく、撮影光学系の光学特性の劣化を防止する上で不利がある。
本発明はこのような事情に鑑みなされたもので、その目的はコストダウン、コンパクト化、調整作業の効率化を図る上で有利であり、撮影光学系の光学特性の劣化を防止する上でも有利なレンズ鏡筒および撮像装置並びにレンズの調芯方法を提供することにある。 However, the former configuration using the coil spring 4A and the adjustment member 4B has a large number of components and a complicated configuration, so that there is a disadvantage in terms of cost and cost reduction due to component costs and adjustment costs, and the coil spring 4A. Since it is necessary to secure a space for arranging the adjusting member 4B, there is a disadvantage in achieving compactness.
In the latter configuration using the alignment ring 6, the operator's hand holding the alignment ring 6 is positioned on the optical axis of the imaging optical system 24 and blocks the light beam, thereby improving the efficiency of adjustment work. There are disadvantages above.
In addition, after the alignment is completed, in order to fix the position of the lens 2, it is necessary to apply an adhesive between the entire circumference of the alignment ring 6 and the entire circumference of the lens 2 and the lens barrel 8. The amount of the agent is large, and it takes time to cure the adhesive, which is disadvantageous in improving the efficiency of the bonding operation.
Further, since the alignment ring 6 has a size extending over the outer periphery of the lens 2 and has a weight, the alignment ring 6 is likely to be displaced when an impact is applied to the lens barrel. This is disadvantageous in preventing the deterioration of the optical characteristics.
The present invention has been made in view of such circumstances, and its purpose is advantageous for cost reduction, compactness, and efficiency of adjustment work, and is advantageous for preventing deterioration of optical characteristics of the photographing optical system. An object of the present invention is to provide a lens barrel, an imaging device, and a lens alignment method.

上述の目的を達成するため、本発明のレンズ鏡筒は、撮影光学系を構成するレンズが取着されるレンズ枠と、前記レンズ枠が取り付けられる鏡筒とを有するものであって、前記鏡筒の周方向に間隔をおいた前記鏡筒と前記レンズ枠の複数箇所に、前記鏡筒の半径方向に間隔をおいて互いに対向する鏡筒側取り付け部とレンズ枠側取り付け部とが設けられ、互いに対向する前記鏡筒側取り付け部および前記レンズ枠側取り付け部と、それら鏡筒側取り付け部と前記レンズ枠側取り付け部との間に形成される空間とにより調芯ピン用取り付け部が構成され、前記各調芯ピン用取り付け部に、前記撮影光学系の光軸に直交する仮想軸に沿って延在する調芯ピンが前記鏡筒側取り付け部および前記空間ならびに前記レンズ枠側取り付け部にわたって設けられ、前記調芯ピンは、前記空間に位置するフランジを有し、前記調芯ピンが前記仮想軸の回りに回転することで前記レンズ枠を前記仮想軸に沿って変位させるカム機構が前記フランジを含んで構成されていることを特徴とする。
また、本発明の撮像装置は、被写体像を撮像する撮像素子と、被写体像を前記撮像素子に導く撮影光学系を構成するレンズと、前記レンズが取着されるレンズ枠と、前記レンズ枠が取り付けられる鏡筒とを有するレンズ鏡筒を備え、前記鏡筒の周方向に間隔をおいた前記鏡筒と前記レンズ枠の複数箇所に、前記鏡筒の半径方向に間隔をおいて互いに対向する鏡筒側取り付け部とレンズ枠側取り付け部とが設けられ、互いに対向する前記鏡筒側取り付け部および前記レンズ枠側取り付け部と、それら鏡筒側取り付け部と前記レンズ枠側取り付け部との間に形成される空間とにより調芯ピン用取り付け部が構成され、前記各調芯ピン用取り付け部に、前記撮影光学系の光軸に直交する仮想軸に沿って延在する調芯ピンが前記鏡筒側取り付け部および前記空間ならびに前記レンズ枠側取り付け部にわたって設けられ、前記調芯ピンは、前記空間に位置するフランジを有し、前記調芯ピンが前記仮想軸の回りに回転することで前記レンズ枠を前記仮想軸に沿って変位させるカム機構が前記フランジを含んで構成されていることを特徴とする。
また、本発明のレンズの調芯方法は、撮影光学系を構成するレンズが取着されるレンズ枠と、前記レンズ枠が取り付けられる鏡筒とを有するレンズ鏡筒において、前記鏡筒の周方向に間隔をおいた前記鏡筒と前記レンズ枠の複数箇所に、前記鏡筒の半径方向に間隔をおいて互いに対向する鏡筒側取り付け部とレンズ枠側取り付け部とを設け、互いに対向する前記鏡筒側取り付け部および前記レンズ枠側取り付け部と、それら鏡筒側取り付け部と前記レンズ枠側取り付け部との間に形成される空間とにより調芯ピン用取り付け部を構成し、前記各調芯ピン用取り付け部に、前記撮影光学系の光軸に直交する仮想軸に沿って延在する調芯ピンを前記鏡筒側取り付け部および前記空間ならびに前記レンズ枠側取り付け部にわたって設け、前記調芯ピンに、前記空間に位置するフランジを設け、前記調芯ピンが前記仮想軸の回りに回転することで前記レンズ枠を前記仮想軸に沿って変位させるカム機構を前記フランジを含んで構成し、前記各調芯ピン用取り付け部において前記調芯ピンを回転することで前記レンズ枠を前記仮想軸に沿って変位させて調芯を行なうようにしたことを特徴とする。
また、本発明のレンズの調芯方法は、撮影光学系を構成するレンズが取着されるレンズ枠と、前記レンズ枠が取り付けられる鏡筒とを有するレンズ鏡筒において、前記鏡筒の周方向に間隔をおいた前記鏡筒と前記レンズ枠の複数箇所に、前記鏡筒の半径方向に間隔をおいて互いに対向する鏡筒側取り付け部とレンズ枠側取り付け部とを設け、互いに対向する前記鏡筒側取り付け部および前記レンズ枠側取り付け部と、それら鏡筒側取り付け部と前記レンズ枠側取り付け部との間に形成される空間とにより調芯ピン用取り付け部を構成し、前記各調芯ピン用取り付け部に、前記撮影光学系の光軸に直交する仮想軸に沿って延在する調芯ピンを前記鏡筒側取り付け部および前記空間ならびに前記レンズ枠側取り付け部にわたって設け、前記調芯ピンを、該調芯ピンの長さ方向に分割された第１のピンと第２のピンとで構成し、前記第１のピンを、前記鏡筒側取り付け部の孔に回転可能に挿入される第１の軸部と、前記第１の軸部の端部に形成された第１フランジ部と、前記第１フランジ部から前記第１の軸部とは反対の方向に突設された第３の軸部とで構成し、前記第２のピンを、前記レンズ枠側取り付け部の孔に回転可能に挿入される第２の軸部と、前記第２の軸部の端部に形成された第２フランジ部と、前記第２の軸部から前記第２フランジ部にわたって前記第２の軸部に対して偏心して設けられ前記第３の軸部が回転可能に挿通される偏心孔とで構成し、前記調芯ピンが前記仮想軸の回りに回転することで前記レンズ枠を前記仮想軸に沿って変位させるカム機構を前記第１フランジ部を含んで構成し、前記各調芯ピン用取り付け部において前記第１の軸部を回転することで前記レンズ枠を前記仮想軸に沿って変位させて調芯を行ない、前記各調芯ピン用取り付け部において前記第２の軸部を回転することで前記各レンズ枠側取り付け部を前記撮影光学系の光軸に沿って変位させて調芯を行なうようにしたことを特徴とする。 In order to achieve the above-described object, a lens barrel of the present invention includes a lens frame to which a lens constituting a photographing optical system is attached, and a lens barrel to which the lens frame is attached. At a plurality of positions of the lens barrel and the lens frame spaced in the circumferential direction of the tube, a lens barrel side mounting portion and a lens frame side mounting portion that are opposed to each other with a space in the radial direction of the lens barrel are provided. The lens barrel side mounting portion and the lens frame side mounting portion facing each other, and a space formed between the lens barrel side mounting portion and the lens frame side mounting portion constitute an alignment pin mounting portion. An alignment pin extending along a virtual axis perpendicular to the optical axis of the photographing optical system is provided on each of the alignment pin attachment portions, and the lens barrel side attachment portion, the space, and the lens frame side attachment portion. Across The alignment pin has a flange located in the space, and a cam mechanism for displacing the lens frame along the virtual axis by rotating the alignment pin around the virtual axis includes the flange. It is characterized by including.
The image pickup apparatus of the present invention includes an image pickup device that picks up a subject image, a lens that constitutes a photographing optical system that guides the subject image to the image pickup device, a lens frame to which the lens is attached, and the lens frame. A lens barrel having a lens barrel attached thereto, and facing each other at a plurality of locations on the lens barrel and the lens frame spaced in the circumferential direction of the lens barrel at intervals in the radial direction of the lens barrel A lens barrel side mounting portion and a lens frame side mounting portion are provided, and the lens barrel side mounting portion and the lens frame side mounting portion facing each other, and between the lens barrel side mounting portion and the lens frame side mounting portion. A centering pin mounting portion is configured by the space formed in the centering pin, and each centering pin mounting portion includes a centering pin extending along a virtual axis perpendicular to the optical axis of the photographing optical system. Mount on the lens barrel side and The centering pin is provided over the space and the lens frame side mounting portion, and the alignment pin has a flange located in the space, and the alignment pin rotates around the virtual axis so that the lens frame is moved to the virtual position. A cam mechanism for displacing along the axis includes the flange.
The lens alignment method of the present invention is a lens barrel having a lens frame to which a lens constituting a photographing optical system is attached, and a lens barrel to which the lens frame is attached. The lens barrel side mounting portion and the lens frame side mounting portion facing each other with a space in the radial direction of the lens barrel are provided at a plurality of locations on the lens barrel and the lens frame spaced apart from each other. The lens barrel side mounting portion, the lens frame side mounting portion, and the space formed between the lens barrel side mounting portion and the lens frame side mounting portion constitute an alignment pin mounting portion, and An alignment pin extending along a virtual axis orthogonal to the optical axis of the photographing optical system is provided on the attachment portion for the core pin over the lens barrel side attachment portion, the space, and the lens frame side attachment portion. Core pin A cam mechanism that displaces the lens frame along the virtual axis by providing a flange located in the space and rotating the alignment pin around the virtual axis, and including the flange, It is characterized in that the centering is performed by displacing the lens frame along the virtual axis by rotating the centering pin in each centering pin mounting portion.
The lens alignment method of the present invention is a lens barrel having a lens frame to which a lens constituting a photographing optical system is attached, and a lens barrel to which the lens frame is attached. The lens barrel side mounting portion and the lens frame side mounting portion facing each other with a space in the radial direction of the lens barrel are provided at a plurality of locations on the lens barrel and the lens frame spaced apart from each other. The lens barrel side mounting portion, the lens frame side mounting portion, and the space formed between the lens barrel side mounting portion and the lens frame side mounting portion constitute an alignment pin mounting portion, and An alignment pin extending along a virtual axis orthogonal to the optical axis of the photographing optical system is provided on the attachment portion for the core pin over the lens barrel side attachment portion, the space, and the lens frame side attachment portion. Core pin Is composed of a first pin and a second pin divided in the length direction of the alignment pin, and the first pin is rotatably inserted into the hole of the lens barrel side attachment portion. A first flange portion formed at an end of the first shaft portion, and a third shaft protruding from the first flange portion in a direction opposite to the first shaft portion. A second shaft portion that is rotatably inserted into the hole of the lens frame side mounting portion, and a second shaft portion that is formed at an end portion of the second shaft portion. A flange portion, and an eccentric hole that is provided eccentrically with respect to the second shaft portion from the second shaft portion to the second flange portion and through which the third shaft portion is rotatably inserted; A cam mechanism that displaces the lens frame along the imaginary axis by rotating the alignment pin around the imaginary axis. Each centering pin is configured to displace the lens frame along the imaginary axis by rotating the first shaft part at each centering pin mounting part. Rotating the second shaft portion in the attachment portion displaces each lens frame side attachment portion along the optical axis of the photographing optical system to perform alignment.

本発明によれば、調芯ピン用取り付け部に取り付けられた調芯ピンを回転することで、レンズ枠を撮影光学系の光軸に直交する仮想軸に沿って変位させるようにしたので、構造が極めて簡素であり、また、大掛かりな調整治具を用いることなく簡単に調整を行うことができるので、部品コストや調整コストを削減でき、レンズ鏡筒および撮像装置のコストダウンを図る上で有利となる。
また、鏡筒側取り付け部、レンズ枠側取り付け部、調芯ピンが占有するスペースが少なくて済むため、レンズ鏡筒および撮像装置のコンパクト化を図る上で有利となる。
また、鏡筒の外方から調芯ピンを回転させることができるので、撮影光学系の光軸上に作業者の手が位置して光束を遮ることがなく、調整作業の効率化を図る上で有利となる。
また、鏡筒側取り付け部からレンズ枠側取り付け部にわたって調芯ピンを設けるといった簡素な構成であるため、調芯ピンに塗布する接着剤の量を削減でき、したがって、接着剤の硬化時間も短縮できるため、接着作業の効率化を図る上で有利である。
また、調芯ピンは小型で重量も極めて軽いので、レンズ鏡筒に衝撃が加わったとしても調芯ピンが回転することがないため、対物レンズの調芯ずれを防止して対物レンズを含む撮影光学系の光学特性の劣化を防止する上で有利となる。 According to the present invention, the lens frame is displaced along a virtual axis orthogonal to the optical axis of the photographing optical system by rotating the alignment pin attached to the alignment pin mounting portion. Is extremely simple, and can be easily adjusted without using a large adjustment jig, which can reduce parts costs and adjustment costs, and is advantageous in reducing the cost of the lens barrel and imaging device. It becomes.
Further, since the space occupied by the lens barrel side mounting portion, the lens frame side mounting portion, and the alignment pin can be reduced, it is advantageous in reducing the size of the lens barrel and the imaging device.
Further, since the alignment pin can be rotated from the outside of the lens barrel, the operator's hand is positioned on the optical axis of the photographing optical system and does not block the light beam, thereby improving the efficiency of the adjustment work. Is advantageous.
In addition, since the alignment pin is provided from the lens barrel side attachment part to the lens frame side attachment part, the amount of adhesive applied to the alignment pin can be reduced, and therefore the curing time of the adhesive is also shortened. This is advantageous in improving the efficiency of the bonding operation.
In addition, since the alignment pin is small and light in weight, the alignment pin will not rotate even if an impact is applied to the lens barrel. This is advantageous in preventing deterioration of the optical characteristics of the optical system.

（第１の実施の形態）
次に本発明のレンズ鏡筒および撮像装置並びにレンズの調芯方法の実施の形態について図面を参照して説明する。
図１は本実施の形態の撮像装置１０を前方から見た斜視図、図２は撮像装置１０の制御系の構成を示すブロック図である。
図１に示すように、本実施の形態において撮像装置１０はビデオカメラであって、外装を構成するケース１２を有し、ケース１２は、左右方向の幅と、この幅よりも大きな寸法の前後方向の長さと、この長さよりも大きな寸法の上下方向の高さとを有している。
なお、本明細書において左右は、撮像装置１０を前方から見た状態でいうものとし、また、被写体側を前方といい、その反対側を後方という。
ケース１２の前面１２Ａの上部には、本発明に係るレンズ鏡筒１４が組み込まれている。
レンズ鏡筒１４は、図２に示すように、鏡筒１６と、鏡筒１６の前端に組み込まれた対物レンズ１８と、鏡筒１６の後端に設けられた撮像素子２０と、鏡筒１６内部で対物レンズ１８の後方に配置され対物レンズ１８で捉えた被写体像を撮像素子２０に導く可動レンズ２２を含む複数のレンズなどを含んで構成され、これら対物レンズ１８、可動レンズ２２、複数のレンズによって撮影光学系２４が構成されている。
なお、可動レンズ２２は、後述するようにその光軸方向に移動することで他のレンズと協働して合焦動作を行うフォーカシングレンズ、あるいは、変倍動作を行うズーミングレンズとして機能するものである。 (First embodiment)
Next, embodiments of a lens barrel, an imaging apparatus, and a lens alignment method of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the imaging apparatus 10 according to the present embodiment as viewed from the front, and FIG.
As shown in FIG. 1, in the present embodiment, the imaging device 10 is a video camera, and has a case 12 that constitutes an exterior. The case 12 has a width in the left-right direction and front and rear dimensions larger than this width. It has a length in the direction and a height in the vertical direction that is larger than this length.
In the present specification, left and right refer to the state in which the imaging device 10 is viewed from the front, the subject side is referred to as the front, and the opposite side is referred to as the rear.
A lens barrel 14 according to the present invention is incorporated in the upper part of the front surface 12A of the case 12.
As shown in FIG. 2, the lens barrel 14 includes a lens barrel 16, an objective lens 18 incorporated at the front end of the lens barrel 16, an imaging device 20 provided at the rear end of the lens barrel 16, and the lens barrel 16. A plurality of lenses including a movable lens 22 that is disposed behind the objective lens 18 and guides an object image captured by the objective lens 18 to the imaging device 20 are included. The objective lens 18, the movable lens 22, and the plurality of lenses are arranged. A photographing optical system 24 is configured by the lens.
As will be described later, the movable lens 22 functions as a focusing lens that performs a focusing operation in cooperation with other lenses by moving in the optical axis direction, or a zooming lens that performs a zooming operation. is there.

レンズ鏡筒１４は、図１に示すように、ケース１２の前面１２Ａの上部の飾りリング１２０２の内部に対物レンズ１８が位置するようにケース１２に組み込まれている。
図１に示すように、ケース１２内の左側面１２Ｃ側には、撮像素子２０で撮像された被写体像の静止画および動画のデータを記録媒体（例えば、磁気テープ、光ディスク、光磁気ディスクなど）に記録し、また、静止画および動画のデータを前記記録媒体から再生する記録再生部２６などが配置されている。
ケース１２の右側面１２Ｄには撮像素子２０によって撮像された被写体像などを表示するためのディスプレイ装置２８が開閉可能に設けられている。
ケース１２の後面１２Ｂおよび左側面１２Ｃには、撮影スタートストップスイッチなどの操作スイッチ３０Ａ（図２参照）や種々の設定を行うための複数の設定スイッチ３０Ｂ（図２参照）が設けられている。
ケース１２の後面１２Ｂの上部には撮像素子２０によって撮像された被写体像などを視認するためのビューファインダー装置３２が組み込まれている。 As shown in FIG. 1, the lens barrel 14 is incorporated in the case 12 so that the objective lens 18 is positioned inside a decorative ring 1202 on the upper surface 12 </ b> A of the case 12.
As shown in FIG. 1, on the left side 12C side in the case 12, a still image and moving image data of a subject image captured by the image sensor 20 is recorded on a recording medium (for example, magnetic tape, optical disk, magneto-optical disk, etc.). And a recording / reproducing unit 26 for reproducing still picture and moving picture data from the recording medium.
On the right side surface 12D of the case 12, a display device 28 for displaying a subject image captured by the image sensor 20 is provided so as to be openable and closable.
The rear surface 12B and the left side surface 12C of the case 12 are provided with an operation switch 30A (see FIG. 2) such as a shooting start / stop switch and a plurality of setting switches 30B (see FIG. 2) for performing various settings.
A viewfinder device 32 for visually recognizing a subject image picked up by the image pickup device 20 is incorporated in the upper part of the rear surface 12B of the case 12.

図２に示すように、撮像素子２０は、撮影光学系２４によって結像された被写体像を撮像するＣＣＤやＣＭＯＳセンサなどで構成されている。
撮像素子２０で撮像された像は撮像信号として画像処理部１００２に出力され、画像処理部１００２ではこの撮像信号に基づいて静止画あるいは動画の画像データが生成され、記録再生部２６により前記記憶媒体に記録され、また、記録再生部２６により前記記録媒体から画像データが再生される。
また、前記画像データは表示処理部１００４によりディスプレイ２８およびビューファインダー装置３２に表示される。
さらに、撮像装置１０は、操作スイッチ３０Ａ、設定スイッチ３０Ｂの操作に応じて、画像処理部１００２、表示処理部１００４を制御するＣＰＵなどを含む制御部１１００６を備えている。 As shown in FIG. 2, the image pickup device 20 is configured by a CCD, a CMOS sensor, or the like that picks up a subject image formed by the photographing optical system 24.
The image picked up by the image pickup device 20 is output as an image pickup signal to the image processing unit 1002, and the image processing unit 1002 generates still image data or moving image image data based on the image pickup signal, and the recording / reproducing unit 26 uses the storage medium In addition, the image data is reproduced from the recording medium by the recording / reproducing unit 26.
The image data is displayed on the display 28 and the viewfinder device 32 by the display processing unit 1004.
Furthermore, the imaging apparatus 10 includes a control unit 11006 including a CPU that controls the image processing unit 1002, the display processing unit 1004, and the like according to the operation of the operation switch 30A and the setting switch 30B.

図３はレンズ鏡筒１４の斜視図、図４はレンズ鏡筒１４の分解斜視図である。
図４に示すように、鏡筒１６は円筒壁状の部分を有し、鏡筒１６の後端にはベース４２が取着され、鏡筒１６の中間部には絞り機構５１が取着され、鏡筒１６の前端にはレンズ枠４４が取着され、ベース４２には撮像素子２０が取着されている。
鏡筒１６の内部には、フォーカスレンズ４６０１を保持する第１のレンズ移動枠４６が設けられている。第１のレンズ移動枠４６は、ガイド軸４６０２、４６０４を介して撮影光学系２４の光軸方向に移動可能に支持され、リニアモータ４６０６により光軸方向に移動されるように構成されている。
また、鏡筒１６の内部には、ズームレンズ４８０１を保持する第２のレンズ移動枠４８が設けられている。第２のレンズ枠４８は、ガイド軸４６０２、４６０４を介して撮影光学系２４の光軸方向に移動可能に支持され、モータ４８０２および雄ねじ機構４８０４により光軸方向に移動されるように構成されている。
本実施の形態では、フォーカスレンズ４６０１とズームレンズ４８０１によって前記の可動レンズ２２が構成されている。 FIG. 3 is a perspective view of the lens barrel 14, and FIG. 4 is an exploded perspective view of the lens barrel 14.
As shown in FIG. 4, the lens barrel 16 has a cylindrical wall-like portion, a base 42 is attached to the rear end of the lens barrel 16, and a diaphragm mechanism 51 is attached to an intermediate portion of the lens barrel 16. The lens frame 44 is attached to the front end of the lens barrel 16, and the image sensor 20 is attached to the base 42.
A first lens moving frame 46 for holding a focus lens 4601 is provided inside the lens barrel 16. The first lens moving frame 46 is supported so as to be movable in the optical axis direction of the photographing optical system 24 via guide shafts 4602 and 4604, and is configured to be moved in the optical axis direction by a linear motor 4606.
In addition, a second lens moving frame 48 that holds a zoom lens 4801 is provided inside the lens barrel 16. The second lens frame 48 is supported so as to be movable in the optical axis direction of the photographing optical system 24 via guide shafts 4602 and 4604, and is configured to be moved in the optical axis direction by a motor 4802 and a male screw mechanism 4804. Yes.
In the present embodiment, the movable lens 22 is configured by the focus lens 4601 and the zoom lens 4801.

次に、レンズ枠４４の取り付け構造について説明する。
図５はレンズ鏡筒１４の要部断面図、図６は鏡筒側取り付け部５４の斜視図、図７は調芯ピン５８の斜視図、図８はレンズ側取り付け部５４と調芯ピン５８の説明図である。
図３、図４に示すように、レンズ枠４４は対物レンズ１８を取着するもので、レンズ枠４４は対物レンズ１８を保持する環状部５０と、環状部５０の外周部の周方向に等間隔をおいた３箇所から対物レンズ１８の中心軸と平行する方向に（後方に）突設されたレンズ枠側取り付け部５２とを備えている。
一方、図４に示すように、鏡筒１６の前端の周方向の３箇所には、レンズ枠側取り付け部５２との間に鏡筒１６の半径方向に間隔をおいて対向する鏡筒側取り付け部５４が設けられ、各レンズ枠側取り付け部５２は、鏡筒側取り付け部５４よりも鏡筒１６の半径方向の外方に位置している。
そして、図５に示すように、各鏡筒側取り付け部５４と、それら鏡筒側取り付け部５４に対応するレンズ枠側取り付け部５２と、それら取り付け部５２、５４間に形成される空間５５とにより調芯ピン用取り付け部５６が構成され、各調芯ピン用取り付け部５６に配設された調芯ピン５８によりレンズ枠４４が鏡筒１６に取着されている。 Next, the attachment structure of the lens frame 44 will be described.
5 is a cross-sectional view of the main part of the lens barrel 14, FIG. 6 is a perspective view of the lens barrel side mounting portion 54, FIG. 7 is a perspective view of the alignment pin 58, and FIG. 8 is a lens side mounting portion 54 and the alignment pin 58. It is explanatory drawing of.
As shown in FIGS. 3 and 4, the lens frame 44 attaches the objective lens 18, and the lens frame 44 has an annular portion 50 for holding the objective lens 18 and a circumferential direction of the outer peripheral portion of the annular portion 50. A lens frame side mounting portion 52 is provided so as to project from three positions spaced apart in the direction parallel to the central axis of the objective lens 18 (rearward).
On the other hand, as shown in FIG. 4, the lens barrel side mounting is opposed to the lens frame side mounting portion 52 at three positions in the circumferential direction of the front end of the lens barrel 16 with a gap in the radial direction of the lens barrel 16. A portion 54 is provided, and each lens frame side attachment portion 52 is located outward in the radial direction of the lens barrel 16 with respect to the lens barrel side attachment portion 54.
As shown in FIG. 5, each lens barrel side mounting portion 54, a lens frame side mounting portion 52 corresponding to the lens barrel side mounting portion 54, and a space 55 formed between the mounting portions 52, 54 Thus, an alignment pin mounting portion 56 is formed, and the lens frame 44 is attached to the lens barrel 16 by the alignment pin 58 disposed in each alignment pin mounting portion 56.

詳細に説明すると、図５、図８に示すように、各レンズ枠側取り付け部５２は、対物レンズ１８の中心軸に直交する仮想線を中心線としたピン挿通孔５２０２と、ピン挿通孔５２０２の周囲で空間５５に臨むレンズ枠側取り付け部５２の内面に形成された当接面５２０４とを備え、当接面５２０４はピン挿通孔５２０２と直交する平面上を延在する平坦な面で形成されている。
また、各鏡筒側取り付け部５４は、図５、図６に示すように、前記仮想線を中心線とした孔５４０２と、孔５４０２の周囲で空間５５に臨む鏡筒側取り付け部５４の外面に形成された当接面５４０４とを備えている。
当接面５４０４は、孔５４０２の周方向に沿って孔５４０２の軸方向に対してその高さが順次変化するらせん状の面で形成されたカム面を構成しており、以後このカム面（当接面５４０４）をカム面５４０４として説明する。 More specifically, as shown in FIGS. 5 and 8, each lens frame side mounting portion 52 includes a pin insertion hole 5202 having a virtual line perpendicular to the central axis of the objective lens 18 as a center line, and a pin insertion hole 5202. And a contact surface 5204 formed on the inner surface of the lens frame side mounting portion 52 facing the space 55, and the contact surface 5204 is formed as a flat surface extending on a plane orthogonal to the pin insertion hole 5202. Has been.
Further, as shown in FIGS. 5 and 6, each barrel-side attachment portion 54 includes a hole 5402 centered on the imaginary line and an outer surface of the barrel-side attachment portion 54 that faces the space 55 around the hole 5402. And an abutting surface 5404 formed thereon.
The abutting surface 5404 constitutes a cam surface formed of a spiral surface whose height sequentially changes with respect to the axial direction of the hole 5402 along the circumferential direction of the hole 5402. The contact surface 5404) will be described as a cam surface 5404.

図５、図７に示すように、調芯ピン５８は、鏡筒側取り付け部５４の孔５４０２に回転可能に挿入される第１の軸部５８０２と、第１の軸部５８０２よりも大きい直径で形成されレンズ側取り付け部５２のピン挿通孔５２０２に回転可能に挿入される第２の軸部５８０４と、それら第１の軸部５８０２と第２の軸部５８０４との間に設けられたフランジ５８０６とを有している。
なお、図９に示すように、第２の軸部５８０４がピン挿通孔５２０２に挿入された状態で、撮影光学系２４の光軸方向に沿った第２の軸部５８０４の外周面の２箇所とピン挿通孔５２０２の内周面の２箇所とが当接することにより、レンズ枠４４が撮影光学系２４の光軸に沿った方向でがたつかないように構成されている。
本実施の形態では、フランジ５８０６は、第１の軸部５８０２側に位置する第１フランジ部５８１０と、第２の軸部５８０４側に位置する第２フランジ部５８１２とを有している。
第１フランジ部５８１０は第１の軸部５８０２の直径よりも大きくかつ第２の軸部５８０４の直径以下の寸法の直径で環板状に形成されている。本実施の形態では、第１フランジ部５８１０は第２の軸部５８０４の直径と同一の寸法で形成されている。
第１フランジ部５８１０が第１の軸部５８０２に臨む端面には、カム面５４０４の傾斜に沿った２つのカム面接触用の当接部５８１４が膨出形成され、それら当接部５８１４がカム面５４０４に当接し調芯ピン５８が回転された際にカム面５４０４に沿ってフランジ５８０６が撮影光学系２４の光軸に直交する方向に円滑に変位するように構成されている。
なお、本実施の形態では、カム面５４０４および当接部５８１４、調芯ピン５８によりレンズ枠４４を撮影光学系２４の光軸と直交する方向に変位させるカム機構が構成されている。 As shown in FIGS. 5 and 7, the alignment pin 58 has a first shaft portion 5802 that is rotatably inserted into the hole 5402 of the lens barrel side attachment portion 54, and a diameter larger than that of the first shaft portion 5802. And a flange provided between the first shaft portion 5802 and the second shaft portion 5804. The second shaft portion 5804 is rotatably inserted into the pin insertion hole 5202 of the lens side mounting portion 52. 5806.
As shown in FIG. 9, two locations on the outer peripheral surface of the second shaft portion 5804 along the optical axis direction of the imaging optical system 24 in a state where the second shaft portion 5804 is inserted into the pin insertion hole 5202. And the two positions on the inner peripheral surface of the pin insertion hole 5202 are in contact with each other, so that the lens frame 44 does not rattle in the direction along the optical axis of the photographing optical system 24.
In the present embodiment, the flange 5806 has a first flange portion 5810 located on the first shaft portion 5802 side and a second flange portion 5812 located on the second shaft portion 5804 side.
The first flange portion 5810 is formed in an annular plate shape with a diameter larger than the diameter of the first shaft portion 5802 and smaller than the diameter of the second shaft portion 5804. In the present embodiment, the first flange portion 5810 is formed with the same size as the diameter of the second shaft portion 5804.
At the end surface where the first flange portion 5810 faces the first shaft portion 5802, two contact portions 5814 for contacting the cam surface along the inclination of the cam surface 5404 are formed bulging, and these contact portions 5814 are cams. The flange 5806 is smoothly displaced in the direction perpendicular to the optical axis of the photographing optical system 24 along the cam surface 5404 when the alignment pin 58 is rotated in contact with the surface 5404.
In the present embodiment, the cam surface 5404, the contact portion 5814, and the alignment pin 58 constitute a cam mechanism that displaces the lens frame 44 in a direction orthogonal to the optical axis of the photographing optical system 24.

第２フランジ部５８１２は、第２の軸部５８０４の周方向に間隔をおいた２箇所から第２の軸部５８０４の半径方向外方に突出形成され、第２フランジ部５８１２が第２の軸部５８０４に臨む端面５８１６はレンズ側取り付け部５２の当接面５２０４に当接されている。
ピン挿通孔５２０２から露出する調芯ピン５８の端部には、調芯ピン５８を回転操作するための工具に係合可能な係合部５８１８（図９参照）が形成されている。
本実施の形態では、調芯ピン５８は、ＰＣ（ポリカーボネート樹脂）、あるいは、ＰＰＳ（ポリフェニレンサルファイド樹脂）などの合成樹脂で形成されている。
なお、２つの当接部５８１４の形状は、当接部５８１４がカム面５４０４に当接し調芯ピン５８が回転された際にカム面５４０４に沿ってフランジ５８０６が撮影光学系２４の光軸に対してその高さが円滑に変化すればよく、その形状は平面でも曲面であってもよいが、平面とすれば、当接部５８１４とカム面５４０４とが安定して当接する上で有利である。
また、当接部５８１４の数は２つに限られるものではなく、１つであってもよく、３つ以上であってもよい。 The second flange portion 5812 is formed to project outward in the radial direction of the second shaft portion 5804 from two locations spaced in the circumferential direction of the second shaft portion 5804, and the second flange portion 5812 is formed as the second shaft. An end surface 5816 facing the portion 5804 is in contact with the contact surface 5204 of the lens side attachment portion 52.
An engaging portion 5818 (see FIG. 9) that can be engaged with a tool for rotating the alignment pin 58 is formed at the end of the alignment pin 58 exposed from the pin insertion hole 5202.
In the present embodiment, the alignment pin 58 is formed of a synthetic resin such as PC (polycarbonate resin) or PPS (polyphenylene sulfide resin).
Note that the shape of the two abutting portions 5814 is such that when the abutting portion 5814 abuts on the cam surface 5404 and the alignment pin 58 is rotated, the flange 5806 is along the optical axis of the photographing optical system 24 along the cam surface 5404. On the other hand, the height may be changed smoothly, and the shape may be a flat surface or a curved surface. However, the flat surface is advantageous for stable contact between the contact portion 5814 and the cam surface 5404. is there.
The number of contact portions 5814 is not limited to two, and may be one or three or more.

図９（Ａ）、（Ｂ）は調芯ピン５８の組み立て説明図である。
調芯ピン５８の組み付けは次のようになされる。
図９（Ａ）に示すように、レンズ側取り付け部５２には、ピン挿通孔５２０２に連通して第２フランジ部５８１２に対応した形状の欠部５２１０が設けられており、調芯ピン５８を組み付ける際には、第２フランジ部５８１２を欠部５２１０に通しつつ調芯ピン５８をピン挿通孔５２０２から孔５４０２（図５参照）に向けて挿通し、フランジ５８０６を空間部５５に位置させ、当接部５８１４をカム面５４０４に当接させたならば、図９（Ｂ）に示すように、調芯ピン５８を回転させる。
これにより、図５に示すように、当接部５８１４がカム面５４０４に当接し、かつ、第２フランジ部５８１２の端面５８１６がレンズ側取り付け部５２の当接面５２０４に当接され、調芯ピン５８の組み付けが終了する。 9A and 9B are assembly explanatory views of the alignment pin 58. FIG.
The alignment pin 58 is assembled as follows.
As shown in FIG. 9A, the lens-side attachment portion 52 is provided with a notch 5210 having a shape corresponding to the second flange portion 5812 in communication with the pin insertion hole 5202. When assembling, the alignment pin 58 is inserted from the pin insertion hole 5202 toward the hole 5402 (see FIG. 5) while the second flange portion 5812 is passed through the notch 5210, and the flange 5806 is positioned in the space portion 55. When the contact portion 5814 is brought into contact with the cam surface 5404, the alignment pin 58 is rotated as shown in FIG. 9B.
As a result, as shown in FIG. 5, the contact portion 5814 contacts the cam surface 5404, and the end surface 5816 of the second flange portion 5812 contacts the contact surface 5204 of the lens side mounting portion 52, thereby aligning the center. The assembly of the pin 58 is completed.

次に、対物レンズ１８の調芯作業について説明する。
まず、レンズ鏡筒１４の前方に所定のテスト画像が形成されたチャートを配置し、対物レンズ１８を含む撮影光学系２４によってテスト画像を撮像素子２０に結像させる。
そして、撮像素子２０によって撮像された画像データから対物レンズ１８を含む撮影光学系２４の光学特性を測定する。
光学特性としては、例えば、ＭＴＦ（ＭｏｄｕｌａｔｉｏｎＴｒａｎｓｆｅｒＦｕｎｃｔｉｏｎ）を用いることができる。
まず、３箇所のうち２箇所の調芯ピン５８を回転することで、それら２つの調芯ピン５８の第２フランジ部５８１２の端面５８１６とレンズ側取り付け部５２の当接面５２０４との間に隙間を形成する。
次いで、残りの１箇所の調芯ピン５８を回転することで、その１つの調芯ピン５８の第２フランジ部５８１２の端面５８１６によりレンズ側取り付け部５２の当接面５２０４を撮影光学系２４の光軸から離間する方向に変位させ、対物レンズ１８を含む撮影光学系２４の光学特性が良好となるように、対物レンズ１８の中心軸を撮影光学系２４の光軸方向と直交する方向に変位させる。
なお、調芯ピン５８の回転量は僅かであり、第２フランジ部５８１２の全体が切り欠き５２１０内に位置し、調芯ピン５８が抜けるおそれはない。
このような調芯ピン５８の回転調整を残り２箇所の調芯ピン５８についても同様に行うことで対物レンズ１８を含む撮影光学系２４の光学特性が最良となったならば、対物レンズ１８の調芯が完了する。
そして、各調芯ピン５８とレンズ側取り付け部５２および鏡筒側取り付け部５４との間に接着剤を塗布して硬化させることで各調芯ピン５８を固定する。
以上で対物レンズ１８の調芯作業が完了する。 Next, the alignment operation of the objective lens 18 will be described.
First, a chart on which a predetermined test image is formed is arranged in front of the lens barrel 14, and the test image is formed on the image sensor 20 by the photographing optical system 24 including the objective lens 18.
Then, the optical characteristics of the photographing optical system 24 including the objective lens 18 are measured from the image data captured by the image sensor 20.
As the optical characteristics, for example, MTF (Modulation Transfer Function) can be used.
First, by rotating two alignment pins 58 of the three locations, between the end surface 5816 of the second flange portion 5812 of the two alignment pins 58 and the contact surface 5204 of the lens side attachment portion 52. Create a gap.
Next, by rotating the remaining one centering pin 58, the abutment surface 5204 of the lens-side attachment portion 52 is brought into contact with the imaging optical system 24 by the end surface 5816 of the second flange portion 5812 of the one centering pin 58. The center axis of the objective lens 18 is displaced in a direction orthogonal to the optical axis direction of the photographing optical system 24 so that the optical characteristics of the photographing optical system 24 including the objective lens 18 are improved. Let
Note that the rotation amount of the alignment pin 58 is small, and the entire second flange portion 5812 is located in the notch 5210, and there is no possibility that the alignment pin 58 will come off.
If the rotation characteristics of the alignment pin 58 are adjusted in the same manner for the remaining two alignment pins 58, the optical characteristics of the photographic optical system 24 including the objective lens 18 become the best. Alignment is complete.
Then, each alignment pin 58 is fixed by applying an adhesive between the alignment pins 58 and the lens side attachment portion 52 and the lens barrel attachment portion 54 and curing them.
Thus, the alignment operation of the objective lens 18 is completed.

本実施の形態によれば、鏡筒側取り付け部５４からレンズ枠側取り付け部５２にわたって設けられた各調芯ピン５８を回転することで、レンズ枠４４を撮影光学系２４の光軸に直交する仮想軸に沿って変位させるようにしたので、構造が極めて簡素であり、また、大掛かりな調整治具を用いることなく簡単に調整を行うことができるので、部品コストや調整コストを削減でき、レンズ鏡筒１４および撮像装置１０のコストダウンを図る上で有利となる。
また、鏡筒側取り付け部５４からレンズ枠側取り付け部５２にわたって調芯ピン５８を設けるといった簡素な構成であるため、これら鏡筒側取り付け部５４、レンズ枠側取り付け部５２、調芯ピン５８が占有するスペースが少なくて済むため、レンズ鏡筒１４および撮像装置１０のコンパクト化を図る上で有利となる。
また、鏡筒１６の外方から調芯ピン５８を回転させることができるので、撮影光学系２４の光軸上に作業者の手が位置して光束を遮ることがなく、調整作業の効率化を図る上で有利となる。
また、鏡筒側取り付け部５４からレンズ枠側取り付け部５２にわたって調芯ピン５８を設けるといった簡素な構成であるため、調芯ピン５８に塗布する接着剤の量を削減でき、したがって、接着剤の硬化時間も短縮できるため、接着作業の効率化を図る上で有利である。
また、調芯ピン５８は小型で重量も極めて軽いので、レンズ鏡筒１４に衝撃が加わったとしても調芯ピン５８が回転することがないため、対物レンズ１８の調芯ずれを防止して対物レンズ１８を含む撮影光学系２４の光学特性の劣化を防止する上で有利となる。
また、複数の調芯ピン５８、鏡筒側取り付け部５４、レンズ枠側取り付け部５２は全て同一形状でよいため、設計、製造の簡素化を図る上で有利となる。 According to the present embodiment, the lens frame 44 is orthogonal to the optical axis of the imaging optical system 24 by rotating each alignment pin 58 provided from the lens barrel side mounting portion 54 to the lens frame side mounting portion 52. Since the displacement is made along the virtual axis, the structure is extremely simple, and the adjustment can be easily performed without using a large adjustment jig. This is advantageous in reducing the cost of the lens barrel 14 and the imaging device 10.
Further, since the alignment pin 58 is provided from the lens barrel side mounting portion 54 to the lens frame side mounting portion 52, the lens barrel side mounting portion 54, the lens frame side mounting portion 52, and the alignment pin 58 are provided. Since it occupies less space, it is advantageous in reducing the size of the lens barrel 14 and the imaging device 10.
Further, since the alignment pin 58 can be rotated from the outside of the lens barrel 16, the operator's hand is positioned on the optical axis of the photographic optical system 24 and does not block the light beam, thereby improving the efficiency of the adjustment work. This is advantageous in achieving this.
In addition, since the alignment pin 58 is provided from the lens barrel side attachment portion 54 to the lens frame side attachment portion 52, the amount of the adhesive applied to the alignment pin 58 can be reduced. Since the curing time can be shortened, it is advantageous for improving the efficiency of the bonding operation.
Further, since the alignment pin 58 is small in size and extremely light in weight, the alignment pin 58 does not rotate even when an impact is applied to the lens barrel 14, so that the alignment shift of the objective lens 18 is prevented and the objective lens 18 is rotated. This is advantageous in preventing deterioration of the optical characteristics of the photographing optical system 24 including the lens 18.
In addition, since the plurality of alignment pins 58, the lens barrel side attaching portion 54, and the lens frame side attaching portion 52 may all have the same shape, it is advantageous in simplifying design and manufacturing.

なお、調芯ピン５８の第２フランジ部５８１２が調芯ピン５８の軸方向に（第２フランジ部５８１２の厚さ方向に）弾性変形可能に構成されていた場合には次のように調整することができる。
すなわち、まず、各調芯ピン５８を回転して第２フランジ部５８１２の端面５８１６をレンズ側取り付け部５２の当接面５２０４に当接させた状態とし、さらに調芯ピン５８を回転させて第２フランジ部５８１２を僅かに弾性変形させ、各レンズ枠側取り付け部５２の箇所が、鏡筒１６の半径方向外側に付勢された状態とする。
次いで、１つの調芯ピン５８を回転してその調芯ピン５８による第２フランジ部５８１２の弾性変形を、残りの２つの調芯ピン５８による第２フランジ部５８１２の弾性変形よりも若干大きくなるようにする。すなわち、１つの第２フランジ部５８１２による付勢力を残りの２つの第２フランジ部５８１２の付勢力よりも若干大きくする。
これにより、対物レンズ１８の中心軸は付勢力の大きな１つの第２フランジ部５８１２に近接し、かつ、残り２つの第２フランジ部５８１２から離間した状態となる。
この状態で前述と同様に撮影光学系２４の光学特性が最良となるように、残りの２つの第２フランジ部５８１２の調芯ピン５８をそれぞれ回転して対物レンズ１８の中心軸の位置を調整する。
対物レンズ１８を含む撮影光学系２４の光学特性が最良となったならば、前述と同様に各調芯ピン５８とレンズ側取り付け部５２および鏡筒側取り付け部５４との間に接着剤を塗布して硬化させることで各調芯ピン５８を固定する。
この場合には、前述の調芯作業に比較して各調芯ピン５８を回転する回数を削減できるため、調整工数の削減を図る上で有利となる。 When the second flange portion 5812 of the alignment pin 58 is configured to be elastically deformable in the axial direction of the alignment pin 58 (in the thickness direction of the second flange portion 5812), the following adjustment is performed. be able to.
That is, first, each alignment pin 58 is rotated to bring the end surface 5816 of the second flange portion 5812 into contact with the contact surface 5204 of the lens side mounting portion 52, and the alignment pin 58 is further rotated to rotate the alignment pin 58. The two flange portions 5812 are slightly elastically deformed so that the positions of the lens frame side attachment portions 52 are biased outward in the radial direction of the lens barrel 16.
Next, one alignment pin 58 is rotated, and the elastic deformation of the second flange portion 5812 by the alignment pin 58 is slightly larger than the elastic deformation of the second flange portion 5812 by the remaining two alignment pins 58. Like that. That is, the urging force by one second flange portion 5812 is made slightly larger than the urging forces of the remaining two second flange portions 5812.
Accordingly, the central axis of the objective lens 18 is close to one second flange portion 5812 having a large urging force, and is separated from the remaining two second flange portions 5812.
In this state, the centering pin 58 of the remaining two second flange portions 5812 is rotated to adjust the position of the central axis of the objective lens 18 so that the optical characteristics of the photographing optical system 24 are the best as described above. To do.
When the optical characteristics of the photographic optical system 24 including the objective lens 18 are the best, an adhesive is applied between each alignment pin 58 and the lens side mounting portion 52 and the lens barrel side mounting portion 54 as described above. Then, each alignment pin 58 is fixed by curing.
In this case, the number of rotations of each alignment pin 58 can be reduced as compared with the alignment operation described above, which is advantageous in reducing adjustment man-hours.

図１０は第１の実施の形態の変形例のレンズ鏡筒１４の斜視図、図１１は図１０の正面図である。
図１０、図１１に示すように、対物レンズ１８の外周の一部を切り取って平坦面１８１０を形成する、いわゆるＤカットを行った場合には、対物レンズ１８の平坦面１８１０に対応する箇所に、調芯ピン５８、鏡筒側取り付け部５４、レンズ枠側取り付け部５２を配置することで、レンズ鏡筒１４の外形の小型化を図る上でより一層有利となる。 10 is a perspective view of a lens barrel 14 according to a modification of the first embodiment, and FIG. 11 is a front view of FIG.
As shown in FIGS. 10 and 11, when a so-called D-cut is performed in which a part of the outer periphery of the objective lens 18 is cut off to form a flat surface 1810, a portion corresponding to the flat surface 1810 of the objective lens 18 is formed. By arranging the alignment pin 58, the lens barrel side mounting portion 54, and the lens frame side mounting portion 52, it is further advantageous in reducing the outer shape of the lens barrel 14.

なお、前記の実施の形態では、カム面５４０４を、鏡筒側取り付け部５４に形成した場合について説明したが、カム面５４０４は、第１の軸部５８０２に臨むフランジ５８０６の端面や、あるいは、第２の軸部５８０４に臨むフランジ５８０６の端面、あるいは、レンズ枠側取り付け部５２の当接面５２０４に形成してもよい。 In the above-described embodiment, the case where the cam surface 5404 is formed in the lens barrel-side attachment portion 54 has been described. You may form in the end surface of the flange 5806 which faces the 2nd axial part 5804, or the contact surface 5204 of the lens frame side attaching part 52. FIG.

（第２の実施の形態）
次に、第２の実施の形態について説明する。
第２の実施の形態が第１の実施の形態と異なるのは、調芯ピンの構造であり、第２の実施の形態では、調芯ピンによりレンズの中心軸を撮影光学系の光軸と直交する方向に変位することに加えて、レンズの中心軸を撮影光学系の光軸に対して傾斜する方向に変位するようにした点である。
図１２は第２の実施の形態のレンズ鏡筒の斜視図、図１３、図１４は鏡筒の前端を示す斜視図、図１５は調芯ピンの斜視図、図１６はレンズ鏡筒の要部断面図、図１７（Ａ）、（Ｂ）は調芯ピンの組み立て説明図である。
なお、以下の実施の形態では、第１の実施の形態と同一の部分、部材には同一の符号を付して説明する。 (Second Embodiment)
Next, a second embodiment will be described.
The second embodiment is different from the first embodiment in the structure of the alignment pin. In the second embodiment, the center axis of the lens is aligned with the optical axis of the photographing optical system by the alignment pin. In addition to the displacement in the orthogonal direction, the center axis of the lens is displaced in a direction inclined with respect to the optical axis of the photographing optical system.
12 is a perspective view of the lens barrel of the second embodiment, FIGS. 13 and 14 are perspective views of the front end of the barrel, FIG. 15 is a perspective view of the alignment pin, and FIG. 16 is a schematic view of the lens barrel. FIG. 17 (A) and FIG. 17 (B) are partial explanatory views of assembly of the alignment pins.
In the following embodiments, the same parts and members as those in the first embodiment will be described with the same reference numerals.

図１２、図１３、図１５、図１６に示すように、調芯ピン６０は、該調芯ピン６０の長さ方向に分割された第１のピン６２と第２のピン６４とで構成されている。
図１５に示すように、第１のピン６２は、鏡筒側取り付け部５４の孔５４０２に回転可能に挿入される第１の軸部６２０２と、第１の軸部６２０２の端部に形成された第１フランジ部６２０４と、第１フランジ部６２０４から第１の軸部６２０２とは反対の方向に突設された第３の軸部６２０６とを有している。
図１５に示すように、第２のピン６４は、レンズ枠側取り付け部５２のピン挿通孔５２０２に回転可能に挿入される第２の軸部６４０２と、第２の軸部６４０２の端部に形成された第２フランジ部６４０４と、第２の軸部６４０２から第２フランジ部６４０４にわたって第２の軸部６４０２に対して偏心して設けられ第３の軸部６２０６が回転可能に挿通される偏心孔６４０６とを有している。
第２フランジ部６４０４は、第１の実施の形態と同様に、第２の軸部６４０２の周方向に間隔をおいた複数箇所から第２の軸部６４０２の半径外方に突出して複数形成されている。 As shown in FIGS. 12, 13, 15, and 16, the alignment pin 60 includes a first pin 62 and a second pin 64 that are divided in the length direction of the alignment pin 60. ing.
As shown in FIG. 15, the first pin 62 is formed on the first shaft portion 6202 that is rotatably inserted into the hole 5402 of the lens barrel side mounting portion 54 and the end portion of the first shaft portion 6202. The first flange portion 6204 and a third shaft portion 6206 protruding from the first flange portion 6204 in a direction opposite to the first shaft portion 6202 are provided.
As shown in FIG. 15, the second pin 64 is provided at the end of the second shaft portion 6402 and the second shaft portion 6402 that is rotatably inserted into the pin insertion hole 5202 of the lens frame side attachment portion 52. The formed second flange portion 6404 and the eccentricity that is provided eccentrically with respect to the second shaft portion 6402 from the second shaft portion 6402 to the second flange portion 6404 and that the third shaft portion 6206 is rotatably inserted. And a hole 6406.
Similar to the first embodiment, a plurality of second flange portions 6404 are formed so as to protrude outward from the radius of the second shaft portion 6402 from a plurality of locations spaced in the circumferential direction of the second shaft portion 6402. ing.

図１４、図１７に示すように、レンズ枠側取り付け部５２には、第１の実施の形態と同様に、第２の軸部６４０２が回転可能に挿入されるピン挿通孔５２０２に連通させて複数の第２フランジ部６４０４を空間に挿入するための複数の切り欠き５２１０が設けられている。
複数の第２フランジ部６４０４は複数の切り欠き５２１０からそれぞれ空間に挿入され仮想軸の回りに回転され第２の軸部６４０２に臨む第２フランジ部６４０４の端面６４２０がレンズ枠側取り付け部５２の当接面５２０４に当接される。
なお、第１フランジ部６２０４が第３の軸部６２０６に臨む端面と第２フランジ部６４０４が空間５５に臨む端面は当接されている。 As shown in FIGS. 14 and 17, the lens frame side mounting portion 52 is communicated with a pin insertion hole 5202 into which the second shaft portion 6402 is rotatably inserted, as in the first embodiment. A plurality of notches 5210 are provided for inserting the plurality of second flange portions 6404 into the space.
The plurality of second flange portions 6404 are respectively inserted into the spaces from the plurality of notches 5210 and rotated around the virtual axis so that the end surface 6420 of the second flange portion 6404 facing the second shaft portion 6402 is the lens frame side attachment portion 52. It abuts on the abutment surface 5204.
The end surface where the first flange portion 6204 faces the third shaft portion 6206 is in contact with the end surface where the second flange portion 6404 faces the space 55.

図１６に示すように、空間５５に臨む鏡筒側取り付け部５４の箇所に、第１の実施の形態と同様に、第１の軸部６２０２が挿入される孔５４０２の周囲に沿って孔５４０２の軸方向に変位しカム機構を構成するカム面５４０４が形成され、第１の軸部６２０２に臨む第１フランジ部６２０４の端面にカム面５４０４に当接する当接部６２０８が設けられている。
第１のピン６２の第３の軸部６２０６の端面および第２のピン６４の第２の軸部６４０２の端面には、それら軸部を回転操作するための工具に係合可能な係合部６２１０、６４１０がそれぞれ設けられている。
なお、調芯ピン６０の各調芯ピン用取り付け部５６への取り付けは第１の実施の形態と同様である。 As shown in FIG. 16, a hole 5402 is formed along the periphery of the hole 5402 into which the first shaft portion 6202 is inserted at the position of the lens barrel side mounting portion 54 facing the space 55, as in the first embodiment. A cam surface 5404 that constitutes a cam mechanism that is displaced in the axial direction is formed, and an abutting portion 6208 that abuts the cam surface 5404 is provided on an end surface of the first flange portion 6204 facing the first shaft portion 6202.
On the end surface of the third shaft portion 6206 of the first pin 62 and the end surface of the second shaft portion 6402 of the second pin 64, an engaging portion that can be engaged with a tool for rotating the shaft portion. 6210 and 6410 are provided, respectively.
Note that the alignment pins 60 are attached to the alignment pin attachment portions 56 in the same manner as in the first embodiment.

第２の実施の形態では、第１のピン６２を回転操作することで第１の実施の形態と同様に対物レンズ１８の中心軸が撮影光学系２４の光軸方向と直交する方向に変位する。
また、第２の実施の形態では、第２のピン６４を回転操作することで、各調芯ピン用取り付け部５６が撮影光学系２４の光軸に沿った方向に変位し、対物レンズ１８の中心軸の傾きが調整され、調芯がなされる。 In the second embodiment, by rotating the first pin 62, the central axis of the objective lens 18 is displaced in a direction perpendicular to the optical axis direction of the photographing optical system 24 as in the first embodiment. .
Further, in the second embodiment, by rotating the second pin 64, each centering pin mounting portion 56 is displaced in the direction along the optical axis of the photographing optical system 24, and the objective lens 18 The inclination of the central axis is adjusted and alignment is performed.

このような第２の実施の形態によれば、第１の実施の形態と同様な効果が得られる他、対物レンズの中心軸の傾きを調整することが可能となるため、調芯作業をより高精度に行うことが可能となる。
なお、第２の実施の形態においても、図１０、図１１に示したのと同様に、Ｄカットされた対物レンズ１８が用いられる場合には、Ｄカットに対応した平坦面１８１０の箇所に、調芯ピン６０、鏡筒側取り付け部５４、レンズ枠側取り付け部５２を配置することで、レンズ鏡筒１４の外形の小型化を図る上でより一層有利となることは無論である。 According to the second embodiment, the same effect as that of the first embodiment can be obtained, and the inclination of the central axis of the objective lens can be adjusted. It becomes possible to carry out with high precision.
In the second embodiment as well, as shown in FIGS. 10 and 11, when the D-cut objective lens 18 is used, the flat surface 1810 corresponding to the D-cut is provided at the location. It goes without saying that the arrangement of the alignment pin 60, the lens barrel side mounting portion 54, and the lens frame side mounting portion 52 is more advantageous in reducing the size of the lens barrel 14.

なお、実施の形態では、撮像装置がデジタルビデオカメラである場合について説明したが、本発明は、デジタルスチルカメラなどの種々の撮像装置、あるいは、カメラ付きの携帯電話機、カメラ付きのＰＤＡ（ＰｅｒｓｏｎａｌＤｉｇｉｔａｌＡｓｓｉｓｔａｎｔｓ）、カメラ付きのノート型パーソナルコンピュータなどに適用可能である。 In the embodiment, the case where the imaging device is a digital video camera has been described. However, the present invention is not limited to various imaging devices such as a digital still camera, a mobile phone with a camera, or a PDA (Personal Digital with a camera). Assistants), notebook personal computers with cameras, and the like.

本実施の形態の撮像装置１０を前方から見た斜視図である。It is the perspective view which looked at the imaging device 10 of this Embodiment from the front. 撮像装置１０の制御系の構成を示すブロック図である。3 is a block diagram illustrating a configuration of a control system of the imaging apparatus 10. FIG. レンズ鏡筒１４の斜視図である。2 is a perspective view of a lens barrel 14. FIG. レンズ鏡筒１４の分解斜視図である。2 is an exploded perspective view of a lens barrel 14. FIG. レンズ鏡筒１４の要部断面図である。2 is a cross-sectional view of a main part of a lens barrel 14. FIG. 鏡筒側取り付け部５４の斜視図である。FIG. 6 is a perspective view of a lens barrel side attaching portion 54. 調芯ピン５８の斜視図である。6 is a perspective view of the alignment pin 58. FIG. レンズ側取り付け部５４と調芯ピン５８の説明図である。It is explanatory drawing of the lens side attaching part 54 and the alignment pin 58. FIG. （Ａ）、（Ｂ）は調芯ピン５８の組み立て説明図である。(A), (B) is assembly explanatory drawing of the alignment pin 58. FIG. 第１の実施の形態の変形例のレンズ鏡筒１４の斜視図である。It is a perspective view of the lens-barrel 14 of the modification of 1st Embodiment. 図１０の正面図である。It is a front view of FIG. 第２の実施の形態のレンズ鏡筒の斜視図である。It is a perspective view of the lens barrel of 2nd Embodiment. 鏡筒の前端を示す斜視図である。It is a perspective view which shows the front end of a lens-barrel. 鏡筒の前端を示す斜視図である。It is a perspective view which shows the front end of a lens-barrel. 調芯ピンの斜視図である。It is a perspective view of an alignment pin. レンズ鏡筒の要部断面図である。It is principal part sectional drawing of a lens-barrel. （Ａ）、（Ｂ）は調芯ピンの組み立て説明図である。(A), (B) is assembly explanatory drawing of a centering pin. 従来技術の説明図である。It is explanatory drawing of a prior art. 従来技術の説明図である。It is explanatory drawing of a prior art.

Explanation of symbols

１０……撮像装置、１４……レンズ鏡筒、１６……鏡筒、１８……対物レンズ、２４……撮影光学系、４４……レンズ枠、５２……レンズ枠側取り付け部、５４……鏡筒側取り付け部、５５……空間、５６……調芯ピン用取り付け部、５８……調芯ピン、５８０６……フランジ。
DESCRIPTION OF SYMBOLS 10 ... Imaging device, 14 ... Lens barrel, 16 ... Lens barrel, 18 ... Objective lens, 24 ... Shooting optical system, 44 ... Lens frame, 52 ... Lens frame side attaching part, 54 ... Lens barrel side mounting portion, 55... Space, 56... Alignment pin mounting portion, 58 .. alignment pin, 5806.

Claims

A lens frame to which a lens constituting the photographing optical system is attached;
A lens barrel to which the lens frame is attached;
A lens barrel having
At a plurality of locations of the lens barrel and the lens frame spaced in the circumferential direction of the lens barrel, there are a lens barrel side mounting portion and a lens frame side mounting portion facing each other with a space in the radial direction of the lens barrel. Provided,
The lens barrel side mounting portion and the lens frame side mounting portion facing each other, and a space formed between the lens barrel side mounting portion and the lens frame side mounting portion constitute an alignment pin mounting portion. ,
An alignment pin extending along a virtual axis perpendicular to the optical axis of the photographing optical system is provided in each of the alignment pin attachment portions over the lens barrel side attachment portion, the space, and the lens frame side attachment portion. And
The alignment pin has a flange located in the space;
The cam mechanism configured to displace the lens frame along the virtual axis by rotating the alignment pin around the virtual axis includes the flange.
A lens barrel characterized by that.

The alignment pin includes a first shaft portion that is rotatably inserted into the hole of the lens barrel side mounting portion, and a second shaft portion that is rotatably inserted into the hole of the lens frame side mounting portion. 2. The lens barrel according to claim 1, wherein the flange is provided between the first shaft portion and the second shaft portion.

The alignment pin includes a first shaft portion that is rotatably inserted into the hole of the lens barrel side mounting portion, and a second shaft portion that is rotatably inserted into the hole of the lens frame side mounting portion. And the flange is provided between the first shaft portion and the second shaft portion,
The end face of the flange located closer to the first shaft part is in contact with the contact surface of the lens barrel side attachment part,
The end face of the flange located closer to the second shaft part is in contact with the contact surface of the lens frame side mounting part,
One of the end faces of the flange, the contact surface of the lens barrel side mounting portion, or the contact surface of the lens frame side mounting portion is arranged along the circumferential direction of the flange with the alignment pin. A cam surface that is displaced in the length direction and constitutes the cam mechanism is formed.
The lens barrel according to claim 1.

2. The lens barrel according to claim 1, wherein the lens frame side mounting portion is located radially outward of the lens barrel with respect to the lens barrel side mounting portion.

The lens frame side mounting portion is located radially outward of the lens barrel from the lens barrel side mounting portion,
The alignment pin includes a first shaft portion that is rotatably inserted into the hole of the lens barrel side mounting portion, and a second shaft portion that is rotatably inserted into the hole of the lens frame side mounting portion. And the flange is provided between the first shaft portion and the second shaft portion,
The first shaft portion is formed with a smaller diameter than the second shaft portion,
The flange includes a first flange portion located closer to the first shaft portion and a second flange portion located closer to the second shaft portion,
The first flange portion is formed in an annular plate shape with a diameter that is larger than the diameter of the first shaft portion and less than the diameter of the second shaft portion,
The end surface of the second flange portion facing the second shaft portion is in contact with the contact surface of the lens frame side mounting portion,
A cam surface that forms the cam mechanism is formed at a position of the lens barrel side mounting portion facing the space and is displaced in the axial direction of the hole along the periphery of the hole into which the first shaft portion is inserted. ,
The lens barrel according to claim 1, wherein a contact portion that contacts the cam surface is provided on an end surface of the first flange portion facing the first shaft portion.

The lens frame side mounting portion is located radially outward of the lens barrel from the lens barrel side mounting portion,
The alignment pin includes a first shaft portion that is rotatably inserted into the hole of the lens barrel side mounting portion, and a second shaft portion that is rotatably inserted into the hole of the lens frame side mounting portion. And the flange is provided between the first shaft portion and the second shaft portion,
The first shaft portion is formed with a smaller diameter than the second shaft portion,
The flange includes a first flange portion located closer to the first shaft portion and a second flange portion located closer to the second shaft portion,
The first flange portion is formed in an annular plate shape with a diameter that is larger than the diameter of the first shaft portion and less than the diameter of the second shaft portion,
A plurality of the second flange portions projecting radially outward from the second shaft portion from a plurality of locations spaced in the circumferential direction of the second shaft portion;
The lens frame side mounting portion is provided with a plurality of cutouts for inserting the plurality of second flange portions into the space in communication with a hole into which the second shaft portion is rotatably inserted.
The plurality of second flange portions are inserted into the spaces from the plurality of notches, rotated around the virtual axis, and an end surface of the second flange portion facing the second shaft portion is the lens frame side mounting portion. The contact surface of the
A cam surface that forms the cam mechanism is formed at a position of the lens barrel side mounting portion facing the space and is displaced in the axial direction of the hole along the periphery of the hole into which the first shaft portion is inserted. ,
The lens barrel according to claim 1, wherein a contact portion that contacts the cam surface is provided on an end surface of the first flange portion facing the first shaft portion.

The lens frame side mounting portion is located radially outward of the lens barrel from the lens barrel side mounting portion,
The alignment pin includes a first shaft portion that is rotatably inserted into the hole of the lens barrel side mounting portion, and a second shaft portion that is rotatably inserted into the hole of the lens frame side mounting portion. And the flange is provided between the first shaft portion and the second shaft portion,
The lens barrel according to claim 1, wherein an engagement portion that can be engaged with a tool for rotating the alignment pin is provided on an end surface of the second shaft portion.

The alignment pin is composed of a first pin and a second pin divided in the length direction of the alignment pin,
The first pin includes a first shaft portion rotatably inserted into a hole of the lens barrel side attachment portion, a first flange portion formed at an end portion of the first shaft portion, and the first pin A third shaft portion projecting from one flange portion in a direction opposite to the first shaft portion;
The second pin includes a second shaft portion rotatably inserted into a hole of the lens frame side mounting portion, a second flange portion formed at an end portion of the second shaft portion, and the second pin An eccentric hole provided eccentrically with respect to the second shaft portion from the second shaft portion to the second flange portion, and through which the third shaft portion is rotatably inserted,
An end surface of the second flange portion facing the second shaft portion is brought into contact with a contact surface of the lens frame side attachment portion,
A cam surface that forms the cam mechanism is formed at a position of the lens barrel side mounting portion facing the space and is displaced in the axial direction of the hole along the periphery of the hole into which the first shaft portion is inserted. ,
The lens barrel according to claim 1, wherein a contact portion that contacts the cam surface is provided on an end surface of the first flange portion facing the first shaft portion.

The alignment pin is composed of a first pin and a second pin divided in the length direction of the alignment pin,
The first pin includes a first shaft portion rotatably inserted into a hole of the lens barrel side attachment portion, a first flange portion formed at an end portion of the first shaft portion, and the first pin A third shaft portion projecting from one flange portion in a direction opposite to the first shaft portion;
The second pin includes a second shaft portion rotatably inserted into a hole of the lens frame side mounting portion, a second flange portion formed at an end portion of the second shaft portion, and the second pin An eccentric hole provided eccentrically with respect to the second shaft portion from the second shaft portion to the second flange portion, and through which the third shaft portion is rotatably inserted,
A plurality of the second flange portions projecting radially outward from the second shaft portion from a plurality of locations spaced in the circumferential direction of the second shaft portion;
The lens frame side mounting portion is provided with a plurality of cutouts for inserting the plurality of second flange portions into the space in communication with a hole into which the second shaft portion is rotatably inserted.
The plurality of second flange portions are inserted into the spaces from the plurality of notches, rotated around the virtual axis, and an end surface of the second flange portion facing the second shaft portion is the lens frame side mounting portion. The contact surface of the
A cam surface that forms the cam mechanism is formed at a position of the lens barrel side mounting portion facing the space and is displaced in the axial direction of the hole along the periphery of the hole into which the first shaft portion is inserted. ,
The lens barrel according to claim 1, wherein a contact portion that contacts the cam surface is provided on an end surface of the first flange portion facing the first shaft portion.

Engagement portions engageable with a tool for rotating the shaft portion on the end surface of the third shaft portion of the first pin and the end surface of the second shaft portion of the second pin The lens barrel according to claim 9, wherein each of the lens barrels is provided.

The lens barrel according to claim 1, wherein the flange is formed so as to be elastically deformable in an axial direction of the alignment pin.

A lens mirror having an imaging element that captures a subject image, a lens that constitutes a photographing optical system that guides the subject image to the imaging element, a lens frame to which the lens is attached, and a lens barrel to which the lens frame is attached With a cylinder,
At a plurality of locations of the lens barrel and the lens frame spaced in the circumferential direction of the lens barrel, there are a lens barrel side mounting portion and a lens frame side mounting portion facing each other with a space in the radial direction of the lens barrel. Provided,
The lens barrel side mounting portion and the lens frame side mounting portion facing each other, and a space formed between the lens barrel side mounting portion and the lens frame side mounting portion constitute an alignment pin mounting portion. ,
An alignment pin extending along a virtual axis perpendicular to the optical axis of the photographing optical system is provided in each of the alignment pin attachment portions over the lens barrel side attachment portion, the space, and the lens frame side attachment portion. And
The alignment pin has a flange located in the space;
The cam mechanism configured to displace the lens frame along the virtual axis by rotating the alignment pin around the virtual axis includes the flange.
An imaging apparatus characterized by that.

A lens frame to which a lens constituting the photographing optical system is attached;
In a lens barrel having a lens barrel to which the lens frame is attached,
A lens barrel side mounting portion and a lens frame side mounting portion facing each other at a distance in the radial direction of the lens barrel at a plurality of locations of the lens barrel and the lens frame spaced in the circumferential direction of the lens barrel. Provided,
The lens barrel side mounting portion and the lens frame side mounting portion facing each other, and a space formed between the lens barrel side mounting portion and the lens frame side mounting portion constitute an alignment pin mounting portion. ,
An alignment pin extending along a virtual axis perpendicular to the optical axis of the photographing optical system is provided in each of the alignment pin attachment portions over the lens barrel side attachment portion, the space, and the lens frame side attachment portion. ,
A flange located in the space is provided on the alignment pin,
A cam mechanism that displaces the lens frame along the virtual axis by rotating the alignment pin around the virtual axis includes the flange,
The alignment is performed by displacing the lens frame along the virtual axis by rotating the alignment pin in each of the alignment pin mounting portions.
A lens alignment method characterized by the above.

A lens frame to which a lens constituting the photographing optical system is attached;
In a lens barrel having a lens barrel to which the lens frame is attached,
A lens barrel side mounting portion and a lens frame side mounting portion facing each other at a distance in the radial direction of the lens barrel at a plurality of locations of the lens barrel and the lens frame spaced in the circumferential direction of the lens barrel. Provided,
The lens barrel side mounting portion and the lens frame side mounting portion facing each other, and a space formed between the lens barrel side mounting portion and the lens frame side mounting portion constitute an alignment pin mounting portion. ,
An alignment pin extending along a virtual axis perpendicular to the optical axis of the photographing optical system is provided in each of the alignment pin attachment portions over the lens barrel side attachment portion, the space, and the lens frame side attachment portion. ,
The alignment pin is composed of a first pin and a second pin divided in the length direction of the alignment pin,
A first shaft portion rotatably inserted into the hole of the lens barrel side attachment portion; a first flange portion formed at an end portion of the first shaft portion; A third shaft portion projecting in a direction opposite to the first shaft portion from one flange portion;
A second shaft portion rotatably inserted into the hole of the lens frame side attachment portion; a second flange portion formed at an end portion of the second shaft portion; An eccentric hole that is eccentrically provided with respect to the second shaft portion from the second shaft portion to the second flange portion and through which the third shaft portion is rotatably inserted,
A cam mechanism that displaces the lens frame along the virtual axis by rotating the alignment pin around the virtual axis includes the first flange portion,
In each of the alignment pin mounting portions, by rotating the first shaft portion, the lens frame is displaced along the virtual axis to perform alignment,
In each of the alignment pin mounting portions, by rotating the second shaft portion, each lens frame side mounting portion is displaced along the optical axis of the photographing optical system to perform alignment.
A lens alignment method characterized by the above.