JP6062196B2 - Lens unit and image pickup apparatus having the same - Google Patents
Lens unit and image pickup apparatus having the same Download PDFInfo
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- JP6062196B2 JP6062196B2 JP2012214007A JP2012214007A JP6062196B2 JP 6062196 B2 JP6062196 B2 JP 6062196B2 JP 2012214007 A JP2012214007 A JP 2012214007A JP 2012214007 A JP2012214007 A JP 2012214007A JP 6062196 B2 JP6062196 B2 JP 6062196B2
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Description
本発明は、撮像素子とレンズ鏡筒とのアオリ調整を容易に行なうことのできるレンズユニット及びこれを具えた撮像装置に関するものである。 The present invention relates to a lens unit that can easily adjust the tilt between an image pickup element and a lens barrel, and an image pickup apparatus including the lens unit.
ＣＣＤやＣＭＯＳ等の撮像素子により得られた画像や動画の撮像信号をデジタル画像データに変換し、メモリなどに記憶したり、液晶表示部に表示するデジタルカメラなどの撮像装置が知られている。 An imaging device such as a digital camera that converts an image or moving image imaging signal obtained by an imaging element such as a CCD or CMOS into digital image data and stores it in a memory or displays it on a liquid crystal display unit is known.
この種の撮像装置では、撮像素子の撮像面の中心が、レンズ鏡筒内に配置されたレンズの光軸と一致し、また、撮像面とレンズ光軸が垂直となるように、撮像素子をレンズ鏡筒に取り付けなければならない。 In this type of image pickup device, the image pickup device is arranged so that the center of the image pickup surface of the image pickup device coincides with the optical axis of the lens arranged in the lens barrel and the image pickup surface and the lens optical axis are perpendicular to each other. Must be attached to the lens barrel.
撮像素子は、素子取付プレートに接着等により接合された撮像素子ユニットの形態でレンズ鏡筒のユニット取付面にネジ止めされる。しかしながら、これら各部品には個体間に製造上のバラツキがあるから、単にネジ止めしただけでは、撮像素子の撮像面がレンズ光軸に対して傾いてしまうことがある。このため、撮像素子の取付角度をレンズ鏡筒に対して傾き調整する所謂チルト調整が行なわれる。 The image sensor is screwed to the unit mounting surface of the lens barrel in the form of an image sensor unit joined to the element mounting plate by bonding or the like. However, since there is a manufacturing variation among these parts, the image pickup surface of the image pickup device may be inclined with respect to the lens optical axis simply by screwing. For this reason, so-called tilt adjustment is performed in which the mounting angle of the image sensor is adjusted with respect to the lens barrel.
また、チルト調整と共に、撮像素子とレンズ鏡筒との間の距離を調整する所謂フランジバック調整も必要に応じて行なわれる。 In addition to the tilt adjustment, so-called flange back adjustment for adjusting the distance between the imaging element and the lens barrel is also performed as necessary.
特許文献１では、チルト調整とフランジバック調整(以下、これらをまとめて「アオリ調整」と称する)は、素子取付プレートとレンズ鏡筒のユニット取付面との間に複数のバネを嵌装し、測定機器を用いて出力画像を参照しながら各ネジの締付量を調整することにより行なわれている。 In Patent Document 1, for tilt adjustment and flange back adjustment (hereinafter collectively referred to as “tilt adjustment”), a plurality of springs are fitted between the element mounting plate and the unit mounting surface of the lens barrel, This is done by adjusting the tightening amount of each screw while referring to the output image using a measuring instrument.
撮像素子等は非常に小さい部品であり、アオリ調整を行なうために、複数の微小なバネを装着する作業は非常に困難である。また、微小なバネはバネ強さにバラツキがあるから、そのバラツキによりアオリ調整が困難となることもある。さらには、出力画像を参照しながらアオリ調整するため、調整作業に非常に時間が掛かってしまう。 An image sensor or the like is a very small component, and it is very difficult to mount a plurality of minute springs in order to perform tilt adjustment. In addition, since the minute spring has a variation in spring strength, it may be difficult to adjust the tilt due to the variation. Furthermore, since the tilt adjustment is performed with reference to the output image, the adjustment work takes a very long time.
そこで、バネに代えて、厚さ調整部材である薄板状のシムをレンズ鏡筒と素子取付プレートとの間に挟んでアオリ調整を行なうことも提案されている。 In view of this, it has been proposed to adjust the tilt by sandwiching a thin plate-shaped shim, which is a thickness adjusting member, between the lens barrel and the element mounting plate instead of the spring.
シムはリング状に形成され、ユニット取付面に設けられたネジ止め用のボスに載置し、シムをネジが貫通することで装着後に移動や脱落しないようにしている。 The shim is formed in a ring shape and is placed on a boss for screwing provided on the unit mounting surface, so that the shim does not move or drop out after being mounted by passing through the screw.
シムをボスに容易に載置するために、細径のシャフトの如き治具が用いられている。然して、シャフトをボスのネジ孔に突き刺し、シャフトにシムを通してシムをボスに載置する。この状態で素子取付プレートに設けられたネジ止め用の取付孔にシャフトを通し、シムがずれないように素子取付プレートを押さえ付けながらシャフトを引き抜いてネジ止めすることで、アオリ調整と共にレンズユニットの組立てが行なわれる。 In order to easily place the shim on the boss, a jig such as a thin shaft is used. However, the shaft is inserted into the screw hole of the boss, the shim is passed through the shaft, and the shim is placed on the boss. In this state, the shaft is passed through the mounting hole for screwing provided on the element mounting plate, and the shaft is pulled out and screwed while pressing the element mounting plate so that the shim does not shift. Assembly is performed.
上記作業は非常に煩雑である。また、メンテナンス等のためにネジを外して撮像素子をレンズ鏡筒から取り外すときも、シャフトの如き治具を使用しなければ、分解したときにシムがずれてレンズ鏡筒内に落下してしまう虞がある。 The above work is very complicated. Also, when removing the image sensor from the lens barrel for maintenance, etc., if a jig such as a shaft is not used, the shim will be displaced and fall into the lens barrel when disassembled. There is a fear.
本発明の目的は、撮像素子とレンズ鏡筒とのアオリ調整を容易に行なうことのできるレンズユニット及びこれを具えた撮像装置を提供することである。 An object of the present invention is to provide a lens unit that can easily adjust the tilt between an image sensor and a lens barrel, and an image pickup apparatus including the lens unit.
本発明に係るレンズユニットは、
光軸の通過する撮像窓の開設されたレンズ鏡筒と、一方の面に撮像素子の装着された素子取付プレートとの間に、薄板リング状のシムを挟んだ状態で、前記素子取付プレートを前記レンズ鏡筒にネジ止めしてなるレンズユニットであって、
前記レンズ鏡筒には、前記撮像窓の周縁に前記素子取付プレートが取り付けられるユニット取付面を有し、該ユニット取付面には、前記素子取付プレートに向けて前記撮像窓の周縁から突設された台座と、該台座から前記素子取付プレートに向けて突設された軸部からなるシム取付部を有し、
前記素子プレートには、前記軸部が挿通可能な孔が開設されており、
前記シムは、前記軸部に挿通可能な孔が開設されており、
前記シム取付部の前記軸部に前記シムの孔を通し、前記台座に前記シムを当接させた状態で、前記素子取付プレートの孔を前記軸部に通し、前記素子取付プレートを前記シムに当接させて前記ユニット取付面に前記素子取付プレートをネジ止めしてなる。
The lens unit according to the present invention is
In a state where a thin plate-shaped shim is sandwiched between a lens barrel having an imaging window through which an optical axis passes and an element mounting plate having an imaging element mounted on one surface, the element mounting plate is A lens unit screwed to the lens barrel,
The lens barrel has a unit mounting surface on which the element mounting plate is mounted on the periphery of the imaging window, and the unit mounting surface projects from the periphery of the imaging window toward the element mounting plate. A pedestal and a shim mounting portion comprising a shaft portion projecting from the pedestal toward the element mounting plate,
The element plate has a hole through which the shaft portion can be inserted,
The shim has a hole that can be inserted into the shaft,
With the shim hole passing through the shaft portion of the shim mounting portion and with the shim in contact with the pedestal, the hole of the element mounting plate is passed through the shaft portion, and the element mounting plate is passed through the shim. The element mounting plate is screwed to the unit mounting surface by contact.
本発明に係るレンズユニットは、シム取付部の軸部にシムの孔を挿通させるだけでシムを台座に載置することができ、シムは軸部に嵌っているからレンズユニットの組立ての際にレンズ鏡筒を動かしてもシムが脱落する虞はない。
上記のようにシムの取付けにシャフトの如き治具を使わなくてもよいから、レンズユニットの組立作業を簡便化できる。
また、メンテナンス等のためにレンズユニットを分解した場合であっても、シムは軸部に嵌っているので、素子取付プレートを取り外してもシムがレンズ鏡筒内等に落下してしまうことを防止できる。
In the lens unit according to the present invention, the shim can be placed on the pedestal only by inserting the hole of the shim into the shaft portion of the shim mounting portion. Since the shim is fitted in the shaft portion, the lens unit is assembled. Even if the lens barrel is moved, the shim does not fall off.
As described above, since it is not necessary to use a jig such as a shaft for mounting the shim, the assembling work of the lens unit can be simplified.
Even when the lens unit is disassembled for maintenance, etc., the shim fits into the shaft, preventing the shim from falling into the lens barrel even if the element mounting plate is removed. it can.
本発明は、シム(50)をシャフトの如き治具を用いることなく装着して、容易にアオリ調整を行なうことのできるレンズユニット(20)及びこれを具えた撮像装置(10)に関するものである。以下、図面を参照しながら本発明を詳細に説明する。 The present invention relates to a lens unit (20) in which a shim (50) can be mounted without using a jig such as a shaft, and tilt adjustment can be easily performed, and an imaging device (10) including the lens unit (20). . Hereinafter, the present invention will be described in detail with reference to the drawings.
本発明の一実施形態として、レンズユニット(20)は、図１に示すように、デジタルカメラ等の筺体(11)の前面に取り付けられて、画像や動画を撮像する撮像装置(10)を構成する。 As an embodiment of the present invention, as shown in FIG. 1, the lens unit (20) is attached to the front surface of a housing (11) such as a digital camera, and constitutes an imaging device (10) that captures images and moving images. To do.
図２は、レンズユニット(20)の分解斜視図である。レンズユニット(20)は、内部に１又は複数枚の撮像レンズを収容した筒状のレンズ鏡筒(30)と、撮像面(61)を有する撮像素子(62)を素子取付プレート(77)に取り付けて構成される撮像素子ユニット(60)との間に、レンズ光軸Ａと撮像面(61)を一致させて、撮像面(61)とレンズ光軸が垂直となるようにアオリ調整を行なう薄板リング状の１又は複数枚のシム(50)を挟んで構成することができる。 FIG. 2 is an exploded perspective view of the lens unit (20). The lens unit (20) includes a cylindrical lens barrel (30) containing one or a plurality of imaging lenses therein and an imaging element (62) having an imaging surface (61) as an element mounting plate (77). The tilt adjustment is performed so that the lens optical axis A and the image pickup surface (61) coincide with the image pickup device unit (60) configured to be attached, and the image pickup surface (61) and the lens optical axis are perpendicular to each other. A thin ring-shaped one or a plurality of shims (50) may be sandwiched.
レンズ鏡筒(30)は、図２に示すように、基端側に撮像レンズを通過した光を撮像素子(62)へ導く矩形の撮像窓(33)が開設されており、該撮像窓(33)の周縁は、素子取付プレート(77)が取り付けられるユニット取付面(31)となっている。 As shown in FIG. 2, the lens barrel (30) is provided with a rectangular imaging window (33) for guiding light that has passed through the imaging lens to the imaging element (62) on the proximal end side. The peripheral edge of 33) is a unit mounting surface (31) to which the element mounting plate (77) is mounted.
ユニット取付面(31)には、撮像窓(33)の周縁に１又は複数のシム取付部(40)が設けられている。図示の実施例では、シム取付部(40)は、矩形の撮像窓(33)の頂点の内、３つの頂点の近傍に設けており、素子取付プレート(77)をネジ止めするボス(32)が併設されている。ボス(32)には、タップの切られたネジ孔(34)が形成されている。 The unit mounting surface (31) is provided with one or a plurality of shim mounting portions (40) on the periphery of the imaging window (33). In the illustrated embodiment, the shim mounting portion (40) is provided in the vicinity of three vertices of the rectangular imaging window (33), and the boss (32) for screwing the element mounting plate (77). Is attached. The boss (32) is formed with a tapped screw hole (34).
シム取付部(40)は、ユニット取付面(31)から突設され、後述するシム(50)を上面(42)に載置する台座(41)と、該台座(41)の先端から突設され、シム(50)が嵌まる軸部(44)と、を含む段付きピンとすることができる。 The shim mounting portion (40) protrudes from the unit mounting surface (31), and a pedestal (41) for placing a shim (50) to be described later on the upper surface (42), and protrudes from the tip of the pedestal (41). And a stepped pin including a shaft portion (44) into which the shim (50) is fitted.
図３は、シム取付部(40)の拡大図である。シム取付部(40)は、台座(41)を円柱状とすることができ、ネジ止め用のボス(32)と連続するよう構成している。台座(41)の高さは、図示のようにボス(32)の頂面より台座(41)の上面(42)を高くすることが望ましい。これにより、ボス(32)の頂面に素子取付プレート(77)が直接当接せず、台座(41)の上面(42)を素子取付プレート(77)の基準面(37)とすることができるからである。 FIG. 3 is an enlarged view of the shim mounting portion (40). The shim mounting portion (40) is configured such that the pedestal (41) can have a cylindrical shape and is continuous with the screw-fixing boss (32). As for the height of the base (41), it is desirable to make the upper surface (42) of the base (41) higher than the top surface of the boss (32) as shown in the figure. Thereby, the element mounting plate (77) does not directly contact the top surface of the boss (32), and the upper surface (42) of the base (41) can be used as the reference surface (37) of the element mounting plate (77). Because it can.
台座(41)の上面(42)は、素子取付プレート(77)が直接当接したり、シム(50)が載置される面となるため、ユニット取付面(31)に平行且つ全ての台座(41)の上面(42)の高さが揃うように形成し、撮像素子ユニット(60)の取付けの際の基準面(37)とすることが望ましい。なお、何れか１つの台座(41)の上面(42)を他よりも高く形成して、この上面(42)を基準面(37)とすることもできる。 The upper surface (42) of the pedestal (41) is the surface on which the element mounting plate (77) directly abuts or the shim (50) is placed, so that it is parallel to the unit mounting surface (31) and all pedestals ( It is desirable that the upper surface (42) of 41) is formed so that the heights thereof are aligned and used as a reference surface (37) when the image pickup device unit (60) is attached. In addition, the upper surface (42) of any one pedestal (41) can be formed higher than the others, and this upper surface (42) can be used as the reference surface (37).
軸部(44)は、台座(41)の中心から突設することができる。軸部(44)は台座(41)よりも小径の円柱状とすることができ、シム(50)を挿入しやすくするために、先端にテーパを形成することが望ましい。 The shaft portion (44) can project from the center of the pedestal (41). The shaft portion (44) can be a cylindrical shape having a smaller diameter than the pedestal (41), and it is desirable to form a taper at the tip in order to facilitate insertion of the shim (50).
軸部(44)は、素子取付プレート(77)を貫通する長さとすることで、素子取付プレート(77)の取付時の位置決めピンを兼ねることができ、位置決め用の他の機構を不要とすることができる。 The shaft portion (44) has a length that penetrates the element mounting plate (77), so that it can also serve as a positioning pin for mounting the element mounting plate (77), eliminating the need for another positioning mechanism. be able to.
具体的実施例として、シム取付部(40)は、台座(41)が直径約２ｍｍ、ユニット取付面(31)からの高さを約２ｍｍとし、軸部(44)は直径約１ｍｍ、台座(41)の上面(42)からの高さを約４ｍｍとすることができる。 As a specific example, the shim mounting portion (40) has a pedestal (41) with a diameter of about 2 mm and a height from the unit mounting surface (31) of about 2 mm, and a shaft portion (44) with a diameter of about 1 mm and a pedestal ( The height of 41) from the upper surface (42) can be about 4 mm.
厚さ調整部材となるシム(50)は薄板リング状のものを採用することができる。より詳細には、図２及び図３に示すように、シム(50)は、中央に軸部(44)に遊嵌するが、台座(41)よりも小径の貫通孔(54)が開設されている。 The shim (50) serving as the thickness adjusting member may be a thin plate ring. More specifically, as shown in FIGS. 2 and 3, the shim (50) is loosely fitted to the shaft (44) at the center, but a through hole (54) having a smaller diameter than the base (41) is opened. ing.
シム(50)の形状は特に限定されるものではないが、台座(41)よりも大きく形成することが望ましい。これにより、シム(50)の製造過程で外周にバリが発生したとしても、バリは直接台座(41)には当たらず、アオリ調整に影響を与えることはない。 The shape of the shim (50) is not particularly limited, but it is preferable that the shim (50) be formed larger than the base (41). As a result, even if burrs are generated on the outer periphery during the manufacturing process of the shim (50), the burrs do not directly hit the pedestal (41) and do not affect the tilt adjustment.
具体的実施例として、シム(50)は、外径３ｍｍ、貫通孔(54)の直径約１．２ｍｍの円環状とすることができる。 As a specific example, the shim (50) may have an annular shape with an outer diameter of 3 mm and a through hole (54) with a diameter of about 1.2 mm.
シム(50)は、荷重が加わっても厚みが変形し難い薄い材料を採用することができ、例えば、ＰＥＴ(ポリエチレンテレフタレート)、ＰＯＭ(ポリアセタール)、ＰＣ(ポリカーボネート)、アクリルなどの熱可塑性樹脂の他、アルミニウム合金等の金属を例示できる。シム(50)は、これら樹脂材料や金属材料を打ち抜きして作製することができる。 The shim (50) can be made of a thin material that does not easily change its thickness when a load is applied. For example, PET (polyethylene terephthalate), POM (polyacetal), PC (polycarbonate), acrylic, and other thermoplastic resins can be used. Other examples include metals such as aluminum alloys. The shim (50) can be produced by punching these resin materials and metal materials.
シム(50)は、アオリ調整を行なうために、複数の厚さを有するものを選択できるようにすることが望ましい。例えば、シム(50)の厚さ(Ｄ)は、３８μｍ、７５μｍ、１２５μｍ及び１８８μｍの４種類とすることができる。
シム(50)の厚さ(Ｄ)を外観で見分けることができるように、厚さに応じて、シム(50)の色を夫々変えたり、シム(50)の周縁に切欠き(図示せず)を形成することが望ましい。
It is desirable that the shim (50) has a plurality of thicknesses to be selected in order to adjust the tilt. For example, the thickness (D) of the shim (50) can be of four types: 38 μm, 75 μm, 125 μm and 188 μm.
In order to distinguish the thickness (D) of the shim (50) by appearance, the color of the shim (50) is changed according to the thickness, or a notch (not shown) is formed on the periphery of the shim (50). ) Is desirable.
シム(50)は、調整すべきチルト角度及びフランジバック量(以下「アオリ量」という)に応じて、単体又は複数種類を組み合わせて使用することができる。
勿論、アオリ調整が不要なシム取付部(40)にはシム(50)を載置する必要はない。
The shim (50) can be used alone or in combination of a plurality of types according to the tilt angle to be adjusted and the flange back amount (hereinafter referred to as “tilt amount”).
Of course, it is not necessary to place the shim (50) on the shim mounting portion (40) that does not require tilt adjustment.
シム(50)は、予め組み立てられるレンズ鏡筒(30)と撮像素子ユニット(60)の組合せから算出されたアオリ量に基づいて、最適な厚さのものが選択され、選択されたシム(50)は、貫通孔(54)をシム取付部(40)の軸部(44)に通して、台座(41)と当接させる。 The shim (50) is selected based on the tilt amount calculated from the combination of the lens barrel (30) and the image sensor unit (60) assembled in advance, and the shim (50) is selected. ) Passes the through hole (54) through the shaft portion (44) of the shim mounting portion (40) and makes contact with the pedestal (41).
シム(50)は、軸部(44)に嵌まっているからレンズ鏡筒(30)を組立てのために移動させてもズレたり脱落することはない。また、シャフトの如き治具を用いる必要もないから、シム(50)の装着作業は可及的に簡便化される。 Since the shim (50) is fitted to the shaft portion (44), the lens barrel (30) is not displaced or dropped even when the lens barrel (30) is moved for assembly. Further, since it is not necessary to use a jig such as a shaft, the mounting operation of the shim (50) is simplified as much as possible.
レンズ鏡筒(30)にシム(50)を取り付けた後、撮像素子ユニット(60)が取り付けられる。 After the shim (50) is attached to the lens barrel (30), the image sensor unit (60) is attached.
撮像素子ユニット(60)は、図２に示すように、アルミニウム合金等の金属製の素子取付プレート(77)の一方の面に、センサ基板(63)を介してＣＣＤやＣＭＯＳなど、撮像面(61)を有する撮像素子(62)を取り付けて構成することができる。センサ基板(63)は、フレキシブル基板(65)等により、撮像装置(10)の制御系に電気的に接続することができる。 As shown in FIG. 2, the image pickup element unit (60) has an image pickup surface (such as a CCD or CMOS) on one surface of a metal element attachment plate (77) such as an aluminum alloy via a sensor substrate (63). An image pickup device (62) having 61) can be attached. The sensor substrate (63) can be electrically connected to the control system of the imaging device (10) by a flexible substrate (65) or the like.
素子取付プレート(77)には、前述したユニット取付面(31)のボス(32)に形成されたネジ孔(34)と対向する位置に夫々ネジ孔(34)よりも径の大きいルーズ孔(74)が開設されている。また、ユニット取付面(31)の軸部(44)と対応した位置に、軸部(44)が嵌まる孔(75)が開設されている。図示の実施例では、これら孔(75)のうち、１つを長孔形状、その他を丸孔形状とし、素子取付プレート(77)等の成型精度のバラツキを許容し、位置決めを容易にできるようにしている。 The element mounting plate (77) has a loose hole (diameter larger than the screw hole (34) at a position facing the screw hole (34) formed in the boss (32) of the unit mounting surface (31) described above. 74) has been established. Further, a hole (75) in which the shaft portion (44) is fitted is formed at a position corresponding to the shaft portion (44) of the unit mounting surface (31). In the illustrated embodiment, one of these holes (75) has a long hole shape, and the other has a round hole shape, allowing variation in molding accuracy of the element mounting plate (77), etc., and facilitating positioning. I have to.
上記構成の撮像素子ユニット(60)は、図２及び図３に示すように、シム取付部(40)にシム(50)が載置された状態で、軸部(44)が孔(75)に嵌るようにユニット取付面(31)に載置する。この後、ルーズ孔(74)にネジ(84)を挿通して、ネジ(84)をボス(32)のネジ孔(34)にネジ止めすることでレンズユニット(20)の組立てが完了する。 As shown in FIGS. 2 and 3, the image sensor unit (60) having the above configuration has the shaft portion (44) having the hole (75) with the shim (50) placed on the shim mounting portion (40). It is placed on the unit mounting surface (31) so that it fits in. Thereafter, the screw (84) is inserted into the loose hole (74), and the screw (84) is screwed into the screw hole (34) of the boss (32) to complete the assembly of the lens unit (20).
レンズ鏡筒(30)と撮像素子ユニット(60)との間には、予め算出されたアオリ量に応じたシム(50)が介在しているから、所定の締付トルクでネジ(84)を締め付けるだけで、組立てと同時にアオリ調整も完了する。このとき、シャフトの如き治具を使用していないから、これら治具の取外作業等も不要であり、レンズユニット(20)の組立作業は可及的に簡便化できる。 Since a shim (50) corresponding to the tilt amount calculated in advance is interposed between the lens barrel (30) and the image sensor unit (60), the screw (84) is attached with a predetermined tightening torque. By simply tightening, the tilt adjustment is completed at the same time as assembly. At this time, since a jig such as a shaft is not used, it is not necessary to remove these jigs, and the assembling work of the lens unit (20) can be simplified as much as possible.
組み立てられたレンズユニット(20)は、図１に示すようにデジタルカメラ等の筺体(11)に取り付けられて、撮像装置(10)が作製される。 As shown in FIG. 1, the assembled lens unit (20) is attached to a housing (11) such as a digital camera to produce an imaging device (10).
本発明のレンズユニット(20)によれば、メンテナンス等でレンズユニット(20)を分解する場合、ネジ(84)を緩めてレンズ鏡筒(30)から素子取付プレート(77)を取り外したときに、シム(50)は貫通孔(54)が軸部(44)に嵌まっており、シム(50)がずれたり、レンズ鏡筒(30)内に脱落することはないから、メンテナンス作業を簡便化することができる。 According to the lens unit (20) of the present invention, when disassembling the lens unit (20) for maintenance or the like, the screw (84) is loosened and the element mounting plate (77) is removed from the lens barrel (30). The shim (50) has a through hole (54) that fits into the shaft (44), so the shim (50) will not be displaced and will not fall into the lens barrel (30). Can be
なお、例えば図３に示すように、シム取付部(40)の台座(41)と、ボス(32)を近接させて構成し、素子取付プレート(77)をネジ(84)止めしたときにネジ(84)の座面(85)の一部を、素子取付プレート(77)を介して、シム(50)及び台座(41)と対向させることが望ましい。これにより、ネジ(84)を締め付けたときに、座面(85)による加えられる素子取付プレート(77)への押圧力は、シム(50)及び／又は台座(41)の上面(42)によって受け止められるから、素子取付プレート(77)が撓んだり変形することもない。 For example, as shown in FIG. 3, the base (41) of the shim mounting portion (40) and the boss (32) are arranged close to each other, and the screw is secured when the element mounting plate (77) is fixed with the screw (84). It is desirable that a part of the seat surface (85) of (84) is opposed to the shim (50) and the pedestal (41) via the element mounting plate (77). Thus, when the screw (84) is tightened, the pressing force applied to the element mounting plate (77) by the seat surface (85) is caused by the shim (50) and / or the upper surface (42) of the base (41). Since it is received, the element mounting plate (77) is not bent or deformed.
本発明の各部構成は上記実施の形態に限らず、特許請求の範囲に記載の技術的範囲内で種々の変形が可能である。 Each part configuration of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.
例えば、シム取付部(40)の数は３つに限定されるものではない。また、シム取付部(40)は、少なくとも１つが台座(41)と軸部(44)を有する構成であれば、他のシムは、ボス(32)等に載置するようにしてもよい。 For example, the number of shim mounting portions (40) is not limited to three. Further, as long as at least one of the shim mounting portions (40) has a pedestal (41) and a shaft portion (44), the other shims may be placed on the boss (32) or the like.
異なる実施形態として、図４(ｂ)に示すように、複数のボス(32)のうち１つの上面を、シム取付部(40)の台座(41)よりも高く形成してアオリ調整の基準面(37)とし、該基準面(37)に対するアオリ量に応じて、図４(ａ)及び図４(ｂ)に示すようにシム取付部(40)にシム(50)を載置するようにしてもよい。 As a different embodiment, as shown in FIG. 4 (b), the upper surface of one of the plurality of bosses (32) is formed higher than the base (41) of the shim mounting portion (40) to adjust the tilt adjustment. (37), and the shim (50) is placed on the shim mounting portion (40) as shown in FIGS. 4 (a) and 4 (b) according to the amount of tilt relative to the reference surface (37). May be.
図５は、シム取付部(40)の台座(41)をリブ(46)から構成した実施例であり、リブ(46)の上面(42)にシム(50)を載置するようにしたものである。
この実施例では、台座(41)がボス(32)に隣接している場合、リブ(46)の何れかをボス(32)と一体化することで、ボス(32)の強度を高めることができる。
FIG. 5 shows an embodiment in which the pedestal (41) of the shim mounting portion (40) is constituted by the rib (46), and the shim (50) is placed on the upper surface (42) of the rib (46). It is.
In this embodiment, when the pedestal (41) is adjacent to the boss (32), the strength of the boss (32) can be increased by integrating any of the ribs (46) with the boss (32). it can.
なお、シム(50)としてスプリングワッシャを採用することもできる。ネジ(84)の締付けにより、スプリングワッシャが押し潰されることで、スプリングワッシャの厚み(Ｄ)をアオリ量とすることができる。また、レンズユニット(20)を組み立てた後、所期のアオリ調整が達成できていなかった場合には、レンズユニット(20)を分解してシム(50)を交換しなくても、ネジ(84)を緩めることでスプリングワッシャの復元力によって、撮像素子ユニット(60)をレンズ鏡筒(20)から離す方向にアオリ量を再調整できる。 A spring washer can also be used as the shim (50). When the screw (84) is tightened, the spring washer is crushed, so that the thickness (D) of the spring washer can be adjusted to a tilt amount. If the desired tilt adjustment cannot be achieved after the lens unit (20) is assembled, the screw (84) can be used without disassembling the lens unit (20) and replacing the shim (50). ) Is loosened, and the tilting amount can be readjusted in the direction away from the lens barrel (20) by the restoring force of the spring washer.
本発明は、撮像素子とレンズ鏡筒とのアオリ調整を容易に行なうことのできるレンズユニット及びこれを具えた撮像装置として有用である。 INDUSTRIAL APPLICABILITY The present invention is useful as a lens unit that can easily adjust the tilt between the image pickup element and the lens barrel and an image pickup apparatus including the lens unit.
(10) デジタルカメラ(撮像装置)
(20) レンズユニット
(30) レンズ鏡筒
(33) 撮像窓
(41) 台座
(42) 上面
(44) 軸部
(50) シム
(54) 孔
(62) 撮像素子
(75) 孔
(77) 素子取付プレート
(84) ネジ
(10) Digital camera (imaging device)
(20) Lens unit
(30) Lens barrel
(33) Imaging window
(41) Pedestal
(42) Top view
(44) Shaft
(50) Sim
(54) Hole
(62) Image sensor
(75) Hole
(77) Element mounting plate
(84) Screw
Claims (8)
前記レンズ鏡筒には、前記撮像窓の周縁に前記素子取付プレートが取り付けられるユニット取付面を有し、該ユニット取付面には、前記素子取付プレートに向けて前記撮像窓の周縁から突設された台座と、該台座から前記素子取付プレートに向けて突設された軸部からなるシム取付部を有し、
前記シム取付部は、前記ユニット取付面に複数形成されており、少なくとも１つに前記シムが装着され、
前記シム取付部には、前記素子取付プレートをネジ止めするボスが併設されており、
前記ボスの頂面の前記ユニット取付面からの高さと前記台座の上面の前記ユニット取付面からの高さは異なり、
前記素子取付プレートには、前記軸部が挿通可能な孔が開設されており、
前記シムは、前記軸部に挿通可能な孔が開設されており、
前記シム取付部の前記軸部に前記シムの孔を通し、前記素子取付プレートの孔を前記軸部に通し、前記素子取付プレートを前記シムに当接させて前記ユニット取付面の前記シム取付部に併設した前記ボスに前記素子取付プレートをネジ止めしてなるレンズユニット。 In a state where a thin plate-shaped shim is sandwiched between a lens barrel having an imaging window through which an optical axis passes and an element mounting plate having an imaging element mounted on one surface, the element mounting plate is A lens unit screwed to the lens barrel,
The lens barrel has a unit mounting surface on which the element mounting plate is mounted on the periphery of the imaging window, and the unit mounting surface projects from the periphery of the imaging window toward the element mounting plate. A pedestal and a shim mounting portion comprising a shaft portion projecting from the pedestal toward the element mounting plate,
A plurality of the shim mounting portions are formed on the unit mounting surface, and the shim is mounted on at least one of the shim mounting portions,
The shim mounting portion is provided with a boss for screwing the element mounting plate,
The height from the unit mounting surface of the top surface of the boss is different from the height from the unit mounting surface of the upper surface of the pedestal,
The element mounting plate has a hole through which the shaft portion can be inserted,
The shim has a hole that can be inserted into the shaft,
Passing the shim hole through the shaft portion of the shim mounting portion, passing the hole of the element mounting plate through the shaft portion, and contacting the element mounting plate to the shim, the shim mounting portion of the unit mounting surface A lens unit in which the element mounting plate is screwed to the boss provided side by side .
An imaging device comprising the lens unit according to claim 1.
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