JP2022094536A

JP2022094536A - Lens device and imaging apparatus

Info

Publication number: JP2022094536A
Application number: JP2020207481A
Authority: JP
Inventors: 雄磨岩▲崎▼; Yuma Iwasaki
Original assignee: Canon Inc
Current assignee: Canon Inc
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2022-06-27

Abstract

To provide a lens device that is advantageous for rotation of an aperture diaphragm around an optical axis.SOLUTION: A lens device 30 includes: a plurality of diaphragm blades 5 forming an aperture diaphragm; a container member 4 for containing the diaphragm blades; a holding member 2 for holding the container member; and a cam member 6 for changing the diameter of an opening formed by the diaphragm blades by being rotated around an optical axis OA. The container member is held so that it can rotate around the optical axis with regard to the holding member.SELECTED DRAWING: Figure 1

Description

本発明は、レンズ装置および撮像装置に関する。 The present invention relates to a lens device and an image pickup device.

従来、複数枚の絞り羽根を同一円周上に等角度間隔で配置し、それぞれの回転軸を中心に複数枚の絞り羽根を回転させることによって複数枚の絞り羽根の内側縁部の連なりで形成される絞りの開口の径を変化させるレンズ装置が知られている。複数枚の絞り羽根のそれぞれは、回転軸となる固定ピンと連動ピンが備えられている。固定ピンは、固定位置に回転可能に支持されている。連動ピンは、円環状のカム板に形成されたカム溝に挿入されている。カム板が回転されることによって、固定ピンに対する連動ピンの位置が変化し、複数枚の絞り羽根の角度が変化する。これによって、複数枚の絞り羽根によって形成される絞りの開口の径が変化する。 Conventionally, a plurality of diaphragm blades are arranged on the same circumference at equal angle intervals, and the plurality of diaphragm blades are rotated around each rotation axis to form a series of inner edges of the plurality of diaphragm blades. A lens device that changes the diameter of the aperture of a diaphragm is known. Each of the plurality of diaphragm blades is provided with a fixing pin and an interlocking pin that serve as a rotation axis. The fixing pin is rotatably supported in a fixed position. The interlocking pin is inserted into a cam groove formed in the annular cam plate. By rotating the cam plate, the position of the interlocking pin with respect to the fixing pin changes, and the angles of the plurality of diaphragm blades change. As a result, the diameter of the aperture of the diaphragm formed by the plurality of diaphragm blades changes.

レンズ装置の絞りの開口の径は、光量を調整するために変化させられるところ、絞りの開口形状は、撮影の効果としてのボケ形状や光条の生じる方向に関連している。また、絞り羽根の枚数は、光条の本数に関連している。 The diameter of the aperture of the diaphragm of the lens device is changed in order to adjust the amount of light, and the shape of the aperture of the diaphragm is related to the blur shape and the direction in which the streaks are generated as an effect of photographing. Also, the number of diaphragm blades is related to the number of striations.

特開２０１７－２１９６６１号公報Japanese Unexamined Patent Publication No. 2017-219661

被写界深度の範囲外に点光源がある場合、絞り値に応じて円形や多角形のボケ形状が現れる。開放の状態から絞りを絞っていくと、ボケ形状は徐々に円形ではなくなり、絞り羽根の枚数に応じた多角形に変化する。また、複数枚の絞り羽根によって形成される開口を通過する光が回折することによって、光条または光芒と呼ばれる、光源を中心にした光の筋が現れることがある。このようなボケ形状や光条は、映像効果として利用されている。特許文献１の絞り機構では、光軸の周りに関する開口形状の角度は、絞り値に応じて一意に決定されるため、ボケ形状の角度や光条の現れる角度は、撮影者により任意に変更することはできない。 When there is a point light source outside the range of the depth of field, a circular or polygonal blurred shape appears depending on the aperture value. When the aperture is stopped down from the open state, the bokeh shape gradually disappears from a circular shape and changes to a polygonal shape according to the number of aperture blades. In addition, light streaks centered on a light source, called striations or rays, may appear due to the diffraction of light passing through an opening formed by a plurality of diaphragm blades. Such blur shapes and striations are used as video effects. In the aperture mechanism of Patent Document 1, since the angle of the aperture shape with respect to the circumference of the optical axis is uniquely determined according to the aperture value, the angle of the blurred shape and the angle at which the striations appear can be arbitrarily changed by the photographer. It is not possible.

本発明の実施例のレンズ装置は、
開口絞りを構成する複数の絞り羽根と、
前記複数の絞り羽根を収容する収容部材と、
前記収容部材を保持する保持部材と、
光軸の周りに回転されることにより前記複数の絞り羽根によって形成される開口の径を変更するカム部材と、
を有し、
前記収容部材は、前記保持部材に対して前記光軸の周りに回転可能に保持されていることを特徴とする。 The lens device of the embodiment of the present invention is
With multiple diaphragm blades that make up the aperture diaphragm,
An accommodating member accommodating the plurality of diaphragm blades, and
A holding member that holds the accommodating member and
A cam member that changes the diameter of the opening formed by the plurality of diaphragm blades by being rotated around the optical axis, and
Have,
The accommodating member is rotatably held around the optical axis with respect to the holding member.

本発明によれば、例えば、光軸の周りにおける開口絞りの回転に有利なレンズ装置を提供することができる。 According to the present invention, for example, it is possible to provide a lens device which is advantageous for rotation of an aperture diaphragm around an optical axis.

実施例１の絞り装置の分解斜視図。An exploded perspective view of the diaphragm device of the first embodiment. 実施例１の絞り装置を示す図。The figure which shows the diaphragm apparatus of Example 1. FIG. 実施例１の絞り装置の断面図。Sectional drawing of the drawing apparatus of Example 1. FIG. 実施例１の絞り装置に設けられた駆動ピンの拡大断面図。FIG. 3 is an enlarged cross-sectional view of a drive pin provided in the diaphragm device of the first embodiment. 実施例２の絞り装置を示す図。The figure which shows the diaphragm device of Example 2. 実施例２のレンズ装置のブロック図。The block diagram of the lens apparatus of Example 2. レンズ制御部によって実行されるレンズ装置の制御動作を示す流れ図。The flow chart which shows the control operation of the lens apparatus executed by the lens control part. 実施例１の絞り装置が設けられたレンズ装置の模式図。The schematic diagram of the lens apparatus provided with the diaphragm apparatus of Example 1. FIG.

以下、添付図面を参照して、本発明を実施するための形態を説明する。以下に説明する実施例によれば、レンズ装置内の絞り装置を回転させることで、光芒の角度を自由に変えることができる。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. According to the embodiment described below, the angle of the light beam can be freely changed by rotating the diaphragm device in the lens device.

図１から図４および図８を用いて、実施例１の絞り装置（絞り機構）１を説明する。図１は、実施例１の絞り装置１の分解斜視図である。図２は、実施例１の絞り装置１を示す図である。図３は、実施例１の絞り装置１の断面図である。図４は、実施例１の絞り装置１に設けられた駆動ピン（連結部材）１１の拡大断面図である。図８は、実施例１の絞り装置１が設けられたレンズ装置３０の模式図である。レンズ装置３０は、デジタルスチルカメラ（撮像装置）３１に着脱可能に装着される。デジタルスチルカメラ３１は、レンズ装置（撮像光学系）３０によって形成された光学像を受光して光電変換するＣＣＤセンサやＣＭＯＳセンサ等の固体撮像素子（光電変換素子）３２を有する。 The diaphragm device (diaphragm mechanism) 1 of the first embodiment will be described with reference to FIGS. 1 to 4 and 8. FIG. 1 is an exploded perspective view of the diaphragm device 1 of the first embodiment. FIG. 2 is a diagram showing the diaphragm device 1 of the first embodiment. FIG. 3 is a cross-sectional view of the diaphragm device 1 of the first embodiment. FIG. 4 is an enlarged cross-sectional view of a drive pin (connecting member) 11 provided in the throttle device 1 of the first embodiment. FIG. 8 is a schematic view of the lens device 30 provided with the aperture device 1 of the first embodiment. The lens device 30 is detachably attached to the digital still camera (imaging device) 31. The digital still camera 31 has a solid-state image pickup element (photoelectric conversion element) 32 such as a CCD sensor or a CMOS sensor that receives an optical image formed by a lens device (imaging optical system) 30 and performs photoelectric conversion.

図１に示すように、絞り装置１は、絞り羽根支持筒４と、複数の絞り羽根５と、カム板（カム部材）６とを有する。複数の絞り羽根５は、開口絞りを構成する。絞り羽根支持筒４は、複数の絞り羽根５を収容する円筒状の収容部材である。図３に示すように、複数の絞り羽根５及びカム板６は、押え金具７によって絞り羽根支持筒４に保持される。絞り装置１は、レンズ装置３０の固定筒（固定部）２内に配置されている。保持部材としての固定筒２は、絞り羽根支持筒４を保持する。絞り羽根支持筒４は、固定筒２に対して光軸ＯＡの周りに回転可能に保持されている。絞り装置１は、固定筒２及び押え金具３によって光軸ＯＡ（図１）に平行な方向の動きが制限されている。 As shown in FIG. 1, the diaphragm device 1 has a diaphragm blade support cylinder 4, a plurality of diaphragm blades 5, and a cam plate (cam member) 6. The plurality of diaphragm blades 5 constitute an aperture diaphragm. The diaphragm blade support cylinder 4 is a cylindrical accommodating member that accommodates a plurality of diaphragm blades 5. As shown in FIG. 3, the plurality of diaphragm blades 5 and the cam plate 6 are held by the diaphragm blade support cylinder 4 by the holding metal fitting 7. The aperture device 1 is arranged in the fixed cylinder (fixed portion) 2 of the lens device 30. The fixed cylinder 2 as a holding member holds the diaphragm blade support cylinder 4. The diaphragm blade support cylinder 4 is rotatably held around the optical axis OA with respect to the fixed cylinder 2. The diaphragm device 1 is restricted from moving in the direction parallel to the optical axis OA (FIG. 1) by the fixed cylinder 2 and the holding metal fitting 3.

カム板６は、絞り羽根支持筒４と同心に配置され、絞り羽根支持筒４に対して回転可能である。絞り羽根５には、固定ピン（不図示）と連動ピン（不図示）がそれぞれ絞り羽根５の面に対して反対方向に凸設される。絞り羽根５は、絞り羽根支持筒４とカム板６の間に狭持される。絞り羽根支持筒４に設けられた穴（不図示）には、固定ピン（不図示）が挿通される。固定ピン（不図示）は、絞り羽根５の回転中心となる。連動ピン（不図示）は、カム板６に設けられたカム溝６ａに挿通される。固定筒２の外部には、撮影者によって回転操作可能な絞り指標環８と絞り指標指示環９が設けられている。絞り指標環８には、カム板駆動ピン１０が設けられる。カム板駆動ピン１０は、固定筒２に設けられた周方向に長い長穴２ｂに挿通され、カム板６の連動腕６ｂに係合する。絞り指標環８が回転されると、カム板駆動ピン１０は、絞り指標環８の回転動作をカム板６の連動腕６ｂに伝え、カム板６を回転させる。 The cam plate 6 is arranged concentrically with the diaphragm blade support cylinder 4 and is rotatable with respect to the diaphragm blade support cylinder 4. A fixing pin (not shown) and an interlocking pin (not shown) are provided on the diaphragm blade 5 in opposite directions with respect to the surface of the diaphragm blade 5, respectively. The diaphragm blade 5 is sandwiched between the diaphragm blade support cylinder 4 and the cam plate 6. A fixing pin (not shown) is inserted into a hole (not shown) provided in the aperture blade support cylinder 4. The fixing pin (not shown) serves as the rotation center of the aperture blade 5. The interlocking pin (not shown) is inserted into the cam groove 6a provided on the cam plate 6. An aperture index ring 8 and an aperture index indicating ring 9 that can be rotated by the photographer are provided on the outside of the fixed cylinder 2. The aperture index ring 8 is provided with a cam plate drive pin 10. The cam plate drive pin 10 is inserted into a long hole 2b provided in the fixed cylinder 2 in the circumferential direction and engages with the interlocking arm 6b of the cam plate 6. When the aperture index ring 8 is rotated, the cam plate drive pin 10 transmits the rotation operation of the aperture index ring 8 to the interlocking arm 6b of the cam plate 6 to rotate the cam plate 6.

撮影者が絞り指標環８を回転させてカム板６を光軸ＯＡの周りに回転させると、複数の絞り羽根５の連動ピンがカム溝６ａに沿って移動し、絞り羽根支持筒４に対する複数の絞り羽根５の角度がそれぞれ変化する。複数の絞り羽根５の内径部の光軸ＯＡからの距離が変化するので、複数の絞り羽根５によって形成される絞りの開口の径（開口面積）が変更される。絞り指標環８は、撮影条件としての絞り値を設定するために撮影者によって操作される操作部材である。絞り指標指示環９は、絞り指標環８の操作の基準となる基準部材である。絞り指標指示環９は、操作指標値または絞り目盛８ａの現在の状態を指し示す絞り指標指示線（操作基準）９ａが設けられている。撮影者は、絞り指標環８に表示された操作指標値または絞り目盛８ａを、絞り指標指示環９に刻印された絞り指標指示線９ａに合致させることによって、所望の絞り値に設定する。 When the photographer rotates the aperture index ring 8 to rotate the cam plate 6 around the optical axis OA, the interlocking pins of the plurality of aperture blades 5 move along the cam groove 6a, and a plurality of the interlocking pins with respect to the aperture blade support cylinder 4 The angle of the aperture blade 5 of the above changes. Since the distance of the inner diameter portion of the plurality of diaphragm blades 5 from the optical axis OA changes, the diameter (opening area) of the aperture of the diaphragm formed by the plurality of diaphragm blades 5 is changed. The aperture index ring 8 is an operating member operated by the photographer to set an aperture value as a shooting condition. The aperture index indicator ring 9 is a reference member that serves as a reference for the operation of the aperture index ring 8. The aperture index instruction ring 9 is provided with an aperture index instruction line (operation reference) 9a indicating an operation index value or the current state of the aperture scale 8a. The photographer sets the desired aperture value by matching the operation index value or the aperture scale 8a displayed on the aperture index ring 8 with the aperture index indicator line 9a engraved on the aperture index indicator ring 9.

図３は、撮影者が撮影中に絞り値を変更する場合の絞り装置１の駆動ピン１１のまわりの構造を示している。駆動ピン１１は、絞り指標指示環９に設けられた穴９ｂと、固定筒２に設けられた長溝２ａに挿通する。固定筒２に絞り指標指示環９と駆動ピン１１を組付けた状態で、絞り指標環８を取り付ける。駆動ピン１１は、両端部にネジ部１１ｃ、１１ｄが形成されている。駆動ピン１１の一方のネジ部１１ｃは、内径部にネジが切られている第１固定部材１２ａに螺合する。駆動ピン１１の他方のネジ部１１ｄは、内径部にネジが切られている第２固定部材１２ｂに螺合する。第１固定部材１２ａ及び第２固定部材１２ｂは、例えば、ナットであるとよい。駆動ピン１１は、ネジ部１１ｃ、１１ｄを介して第１状態Ｐ１と第２状態Ｐ２との間を遷移する。第１固定部材１２ａは、絞り指標指示環９に設けられた係合溝９ｃに係合することで、駆動ピン１１の軸線１１ｂまわりの第１固定部材１２ａの回転が規制される。また、第２固定部材１２ｂは、絞り羽根支持筒４に設けられた係合溝４ｂに係合することで、駆動ピン１１の軸線１１ｂまわりの第２固定部材１２ｂの回転が規制される。第１固定部材１２ａ及び第２固定部材１２ｂが駆動ピン１１に連結されるので、駆動ピン（連結部材）１１は、絞り指標指示環９と絞り羽根支持筒４を連結する。 FIG. 3 shows the structure around the drive pin 11 of the aperture device 1 when the photographer changes the aperture value during photography. The drive pin 11 is inserted into a hole 9b provided in the aperture index indicating ring 9 and a long groove 2a provided in the fixed cylinder 2. The aperture index ring 8 is attached with the aperture index indicator ring 9 and the drive pin 11 attached to the fixed cylinder 2. The drive pin 11 has screw portions 11c and 11d formed at both ends thereof. One threaded portion 11c of the drive pin 11 is screwed into the first fixing member 12a having a threaded inner diameter portion. The other threaded portion 11d of the drive pin 11 is screwed into the second fixing member 12b whose inner diameter portion is threaded. The first fixing member 12a and the second fixing member 12b may be, for example, nuts. The drive pin 11 transitions between the first state P1 and the second state P2 via the screw portions 11c and 11d. By engaging the first fixing member 12a with the engaging groove 9c provided in the aperture index indicating ring 9, the rotation of the first fixing member 12a around the axis 11b of the drive pin 11 is restricted. Further, by engaging the second fixing member 12b with the engaging groove 4b provided in the diaphragm blade support cylinder 4, the rotation of the second fixing member 12b around the axis 11b of the drive pin 11 is restricted. Since the first fixing member 12a and the second fixing member 12b are connected to the drive pin 11, the drive pin (connecting member) 11 connects the aperture index indicating ring 9 and the aperture blade support cylinder 4.

駆動ピン１１が駆動ピン１１の軸線１１ｂを中心に回転されると、駆動ピン１１は、上下方向に移動する。駆動ピン１１が軸線１１ｂを中心に右回り（第１方向）に回転されると、駆動ピン１１が下がり、図３に示すように、駆動ピン１１に設けられた突起部１１ａが固定筒２の外径部に押し当てられる。第１固定部材１２ａと突起部１１ａの間の距離が大きくなり、第２固定部材１２ｂと突起部１１ａの間の距離が小さくなる。第２固定部材１２ｂと突起部１１ａによって固定筒２を挟みこむことによって、第２固定部材１２ｂと固定筒２の間に及び突起部１１ａと固定筒２の間に摩擦力が働き、駆動ピン１１は、固定筒２に固定される。これによって、固定筒２に対する絞り指標指示環９の回転は規制される。このとき、図３に示すように、駆動ピン１１は、絞り指標指示環９が固定筒２に対して回転しないように駆動ピン１１によって絞り指標指示環９と固定筒２を固定する第１状態Ｐ１をとる。 When the drive pin 11 is rotated about the axis 11b of the drive pin 11, the drive pin 11 moves in the vertical direction. When the drive pin 11 is rotated clockwise (first direction) about the axis 11b, the drive pin 11 is lowered, and as shown in FIG. 3, the protrusion 11a provided on the drive pin 11 is a fixed cylinder 2. It is pressed against the outer diameter. The distance between the first fixing member 12a and the protrusion 11a becomes large, and the distance between the second fixing member 12b and the protrusion 11a becomes small. By sandwiching the fixing cylinder 2 between the second fixing member 12b and the protrusion 11a, a frictional force acts between the second fixing member 12b and the fixing cylinder 2 and between the protrusion 11a and the fixing cylinder 2, and the drive pin 11 Is fixed to the fixed cylinder 2. As a result, the rotation of the aperture index indicating ring 9 with respect to the fixed cylinder 2 is restricted. At this time, as shown in FIG. 3, the drive pin 11 is in the first state in which the aperture index indicator ring 9 and the fixed cylinder 2 are fixed by the drive pin 11 so that the aperture index indicator ring 9 does not rotate with respect to the fixed cylinder 2. Take P1.

駆動ピン１１の第１状態Ｐ１において第１固定部材１２ａと突起部１１ａの距離が大きくなり、絞り指標指示環９と突起部１１ａによる絞り指標環８の締結が解除される。絞り指標環８は、固定筒２に対して固定されていないので、絞り指標環８に作用する力が固定筒２に対して働かない。絞り指標環８は、絞り指標指示環９に対して光軸ＯＡを中心に回転可能である。駆動ピン１１が第１状態Ｐ１にある場合、撮影者は、回転が規制された絞り指標指示環９に対して絞り指標環８を回転させることによって任意に絞り値を変更することができる。駆動ピン１１が絞り指標環８に設けられた切り欠き部８ｂを通って延在しているので、絞り指標環８の回転範囲は、切り欠き部８ｂの周方向の長さによって定まる。 In the first state P1 of the drive pin 11, the distance between the first fixing member 12a and the protrusion 11a becomes large, and the fastening of the aperture index ring 9 and the aperture index ring 8 by the protrusion 11a is released. Since the aperture index ring 8 is not fixed to the fixed cylinder 2, the force acting on the aperture index ring 8 does not act on the fixed cylinder 2. The aperture index ring 8 is rotatable about the optical axis OA with respect to the aperture index indicator ring 9. When the drive pin 11 is in the first state P1, the photographer can arbitrarily change the aperture value by rotating the aperture index ring 8 with respect to the aperture index indicator ring 9 whose rotation is restricted. Since the drive pin 11 extends through the notch 8b provided in the aperture index ring 8, the rotation range of the aperture index ring 8 is determined by the circumferential length of the notch 8b.

図４は、撮影者が撮影中に絞り値を変更せずに光芒の向き即ち絞りの開口形状の向きを変更する場合の駆動ピン１１のまわりの構造を示している。駆動ピン１１が軸線１１ｂを中心に左回り（第１方向と反対の第２方向）に回転されると、駆動ピン１１が上がり、図４に示すように、駆動ピン１１に設けられた突起部１１ａが絞り指標環８の内径部に押し当てられる。第１固定部材１２ａと突起部１１ａの間の距離が小さくなり、第２固定部材１２ｂと突起部１１ａの間の距離が大きくなる。突起部１１ａと第２固定部材１２ｂによる固定筒２の挟み込みが解除されるので、駆動ピン１１は、固定筒２に対して回転可能になる。このとき、駆動ピン１１は、絞り指標指示環９が固定筒２に対して回転するように駆動ピン１１による絞り指標指示環９と固定筒２の固定を解除する第２状態Ｐ２をとる。 FIG. 4 shows the structure around the drive pin 11 when the photographer changes the direction of the light beam, that is, the direction of the aperture shape of the diaphragm without changing the aperture value during shooting. When the drive pin 11 is rotated counterclockwise (the second direction opposite to the first direction) about the axis 11b, the drive pin 11 rises, and as shown in FIG. 4, a protrusion provided on the drive pin 11 11a is pressed against the inner diameter portion of the aperture index ring 8. The distance between the first fixing member 12a and the protrusion 11a becomes smaller, and the distance between the second fixing member 12b and the protrusion 11a becomes larger. Since the pinching of the fixed cylinder 2 by the protrusion 11a and the second fixing member 12b is released, the drive pin 11 can rotate with respect to the fixed cylinder 2. At this time, the drive pin 11 takes a second state P2 for releasing the fixation of the aperture index instruction ring 9 and the fixed cylinder 2 by the drive pin 11 so that the aperture index instruction ring 9 rotates with respect to the fixed cylinder 2.

駆動ピン１１の第２状態Ｐ２において第１固定部材１２ａと突起部１１ａの間の距離が小さくなり、絞り指標環８及び絞り指標指示環９は、第１固定部材１２ａと突起部１１ａによって挟み込まれる。絞り指標環８と絞り指標指示環９の間には摩擦力が働き、絞り指標環８と絞り指標指示環９は、互いに固定される。駆動ピン１１の第２状態Ｐ２において、絞り羽根支持筒４、駆動ピン１１、絞り指標環８及び絞り指標指示環９は、光軸ＯＡを中心に連動して回転可能である。すなわち、駆動ピン１１が第２状態Ｐ２にある場合に、絞り指標指示環９の回転に連動して、絞り羽根支持筒４及び絞り指標環８は、固定筒２に対して光軸ＯＡを中心に回転される。駆動ピン１１が固定筒２に設けられた長溝２ａを通って延在しているので、絞り指標指示環９と絞り羽根支持筒４の回転範囲は、長溝２ａの周方向の長さによって定まる。 In the second state P2 of the drive pin 11, the distance between the first fixing member 12a and the protrusion 11a becomes smaller, and the aperture index ring 8 and the aperture index indicator ring 9 are sandwiched between the first fixing member 12a and the protrusion 11a. .. A frictional force acts between the aperture index ring 8 and the aperture index indicator ring 9, and the aperture index ring 8 and the aperture index indicator ring 9 are fixed to each other. In the second state P2 of the drive pin 11, the diaphragm blade support cylinder 4, the drive pin 11, the diaphragm index ring 8 and the diaphragm index indicator ring 9 can rotate in conjunction with the optical axis OA. That is, when the drive pin 11 is in the second state P2, the aperture blade support cylinder 4 and the aperture index ring 8 are centered on the optical axis OA with respect to the fixed cylinder 2 in conjunction with the rotation of the aperture index indicator ring 9. Is rotated to. Since the drive pin 11 extends through the long groove 2a provided in the fixed cylinder 2, the rotation range of the diaphragm index indicating ring 9 and the diaphragm blade support cylinder 4 is determined by the length of the long groove 2a in the circumferential direction.

駆動ピン１１に第２状態Ｐ２において絞り指標指示環９の回転に連動して絞り羽根支持筒４が回転される場合、カム板６と絞り指標環８は、絞り羽根支持筒４の回転に連動して回転する。すなわち、絞り指標指示環９、絞り羽根支持筒４、カム板６及び絞り指標環８が一緒に光軸ＯＡを中心に回転するので、絞り羽根支持筒４とカム板６の相対的な回転が生じない。したがって、絞り羽根支持筒４が光軸ＯＡを中心に回転されても、絞りの開口の径すなわち絞り値は変化しない。駆動ピン１１が第２状態Ｐ２にある場合、撮影者は、撮影中に絞り指標環８又は絞り指標指示環９を固定筒２に対して光軸ＯＡを中心に回転させることによって、絞りの開口の径を保持したまま光軸ＯＡを中心に絞りの開口形状の角度を変更することができる。このとき、絞り目盛８ａと絞り指標指示線９ａの相対的な位置が変わらないので、絞り目盛８ａは、正しい絞り値を表している。光芒を所望の向きに設定した後で絞り値の設定を変更する場合、撮影者は、駆動ピン１１を右回りに回転させて駆動ピン１１を第１状態にした後で絞り指標環８を回転させることにより絞り値を再度設定することができる。 When the aperture blade support cylinder 4 is rotated by the drive pin 11 in conjunction with the rotation of the aperture index indicator ring 9 in the second state P2, the cam plate 6 and the aperture index ring 8 are interlocked with the rotation of the aperture blade support cylinder 4. And rotate. That is, since the aperture index indicating ring 9, the aperture blade support cylinder 4, the cam plate 6, and the aperture index ring 8 rotate together about the optical axis OA, the relative rotation of the aperture blade support cylinder 4 and the cam plate 6 is caused. Does not occur. Therefore, even if the diaphragm blade support cylinder 4 is rotated about the optical axis OA, the diameter of the aperture of the diaphragm, that is, the diaphragm value does not change. When the drive pin 11 is in the second state P2, the photographer rotates the aperture index ring 8 or the aperture index indicating ring 9 with respect to the fixed cylinder 2 about the optical axis OA to open the aperture. The angle of the aperture shape of the diaphragm can be changed around the optical axis OA while maintaining the diameter of the aperture. At this time, since the relative positions of the aperture scale 8a and the aperture index indicator line 9a do not change, the aperture scale 8a represents the correct aperture value. When changing the aperture value setting after setting the light beam in the desired direction, the photographer rotates the drive pin 11 clockwise to put the drive pin 11 in the first state, and then rotates the aperture index ring 8. The aperture value can be set again by setting the aperture value.

実施例１によれば、撮影の効果としてのボケ形状の方向や光条の生じる方向を回転することができる。実施例１では、絞り装置１を回転させるために、絞り羽根支持筒４と絞り指標指示環９を駆動ピン１１によって接続している。しかし、本実施例は、これに限定されるものではない。絞り羽根支持筒４は、絞り指標環８やその他の部材に接続されて回転されてもよい。 According to the first embodiment, it is possible to rotate the direction of the blurred shape and the direction in which the streaks are generated as an effect of photographing. In the first embodiment, in order to rotate the diaphragm device 1, the diaphragm blade support cylinder 4 and the diaphragm index indicating ring 9 are connected by a drive pin 11. However, this embodiment is not limited to this. The diaphragm blade support cylinder 4 may be connected to the diaphragm index ring 8 and other members and rotated.

また、実施例１では、駆動ピン１１、第１固定部材１２ａ及び第２固定部材１２ｂを用いて、摩擦力によって絞り羽根支持筒４、絞り指標環８及び絞り指標指示環９の固定筒２に対する回転動作を規制している。しかし、実施例１は、これに限定されるものではない。絞り羽根支持筒４、絞り指標環８又は絞り指標指示環９の回転動作を任意のタイミングで規制することができれば、電磁力を生じる部材や粘性力を有する部材を用いてもよい。実施例１によれば、絞りの開口形状の方向を任意に回転可能なレンズ装置３０を提供することができる。 Further, in the first embodiment, the drive pin 11, the first fixing member 12a, and the second fixing member 12b are used with respect to the fixed cylinder 2 of the diaphragm blade support cylinder 4, the diaphragm index ring 8, and the diaphragm index indicator ring 9 by frictional force. The rotation operation is regulated. However, the first embodiment is not limited to this. If the rotational operation of the diaphragm blade support cylinder 4, the diaphragm index ring 8 or the diaphragm index indicator ring 9 can be regulated at an arbitrary timing, a member that generates an electromagnetic force or a member having a viscous force may be used. According to the first embodiment, it is possible to provide a lens device 30 that can arbitrarily rotate the direction of the aperture shape of the diaphragm.

以下、図５から図７を用いて、実施例２を説明する。実施例２において、実施例１と同様の構造には同様の参照符号を付して説明を省略する。実施例２のレンズ装置４０（図６）および絞り装置１３（図５）は、実施例１のレンズ装置３０及び絞り装置１と異なる。以下、異なる点を主に説明する。図５は、実施例２の絞り装置１３を示す図である。図５に示すように、絞り装置１３は、絞り羽根支持筒２１と、複数の絞り羽根５と、カム板１９とを有する。絞り装置１３は、レンズ装置４０（図６）の固定筒（固定部）１８内に配置されている。固定筒１８の外部には、絞り指標環１４と絞り指標指示環２４が設けられている。 Hereinafter, the second embodiment will be described with reference to FIGS. 5 to 7. In the second embodiment, the same structure as that of the first embodiment is designated by the same reference numerals and the description thereof will be omitted. The lens device 40 (FIG. 6) and the diaphragm device 13 (FIG. 5) of the second embodiment are different from the lens device 30 and the diaphragm device 1 of the first embodiment. Hereinafter, the different points will be mainly described. FIG. 5 is a diagram showing the diaphragm device 13 of the second embodiment. As shown in FIG. 5, the diaphragm device 13 has a diaphragm blade support cylinder 21, a plurality of diaphragm blades 5, and a cam plate 19. The aperture device 13 is arranged in the fixed cylinder (fixed portion) 18 of the lens device 40 (FIG. 6). A diaphragm index ring 14 and a diaphragm index indicator ring 24 are provided on the outside of the fixed cylinder 18.

絞り指標指示環２４には、スイッチ１５が設けられている。実施例２の絞り指標指示環２４は、複数の絞り羽根５を収容する絞り羽根支持筒２１と機械的に連結されていない。実施例２の絞り装置１３は、絞り指標環１４と機械的に連結されていない。絞り羽根支持筒２１には、カム板１９を光軸ＯＡを中心に回転させる第１アクチュエータ２３が設けられている。固定筒１８には、絞り羽根支持筒２１を光軸ＯＡを中心に回転させる第２アクチュエータ２６が設けられている。絞り装置１３は、第２アクチュエータ２６によって光軸ＯＡを中心に３６０度以上回転可能である。 A switch 15 is provided on the aperture index indicating ring 24. The diaphragm index indicating ring 24 of the second embodiment is not mechanically connected to the diaphragm blade support cylinder 21 accommodating the plurality of diaphragm blades 5. The aperture device 13 of the second embodiment is not mechanically connected to the aperture index ring 14. The diaphragm blade support cylinder 21 is provided with a first actuator 23 that rotates the cam plate 19 about the optical axis OA. The fixed cylinder 18 is provided with a second actuator 26 that rotates the diaphragm blade support cylinder 21 around the optical axis OA. The diaphragm device 13 can rotate 360 degrees or more about the optical axis OA by the second actuator 26.

図６は、実施例２のレンズ装置４０のブロック図である。レンズ装置４０は、スイッチ１５、レンズ制御部１６、第１回転情報検出部材２０、第２回転情報検出部材２２、第１エンコーダ１７、第２エンコーダ２５、第１アクチュエータ２３及び第２アクチュエータ２６を有する。スイッチ１５は、撮影者が撮影中に絞り値を変更可能な第１モードと、絞り値を変更せずに光条の向きや開口形状のボケの向きを変更可能な第２モードとを切り替える。レンズ制御部１６は、ＣＰＵ（不図示）、プログラムを保存するＲＯＭ（不図示）及びデータを保存するＲＡＭ（不図示）を有する。 FIG. 6 is a block diagram of the lens device 40 of the second embodiment. The lens device 40 includes a switch 15, a lens control unit 16, a first rotation information detection member 20, a second rotation information detection member 22, a first encoder 17, a second encoder 25, a first actuator 23, and a second actuator 26. .. The switch 15 switches between a first mode in which the photographer can change the aperture value during shooting and a second mode in which the direction of the striations and the direction of the blur of the aperture shape can be changed without changing the aperture value. The lens control unit 16 has a CPU (not shown), a ROM for storing a program (not shown), and a RAM (not shown) for storing data.

第１エンコーダ（第１検出部）１７は、絞り指標環１４の回転量（操作量）を検出し、検出した回転量をレンズ制御部１６へ出力する。第２エンコーダ（第２検出部）２５は、絞り指標指示環２４の回転量を検出し、検出した回転量をレンズ制御部１６へ出力する。第１回転情報検出部材２０は、固定筒１８に対するカム板１９の第１回転位相情報を検出する。第２回転情報検出部材２２は、固定筒１８に対する絞り羽根支持筒２１の第２回転位相情報を検出する。 The first encoder (first detection unit) 17 detects the rotation amount (operation amount) of the aperture index ring 14, and outputs the detected rotation amount to the lens control unit 16. The second encoder (second detection unit) 25 detects the rotation amount of the aperture index indicating ring 24 and outputs the detected rotation amount to the lens control unit 16. The first rotation information detection member 20 detects the first rotation phase information of the cam plate 19 with respect to the fixed cylinder 18. The second rotation information detection member 22 detects the second rotation phase information of the diaphragm blade support cylinder 21 with respect to the fixed cylinder 18.

図７は、レンズ制御部１６によって実行されるレンズ装置４０の制御動作を示す流れ図である。レンズ制御部１６のＣＰＵ（不図示）は、ＲＯＭ（不図示）に保存されたプログラムに従ってレンズ装置４０の制御動作を実行する。図７を用いて、レンズ装置４０における絞り値の変更および絞り装置１３の回転処理を説明する。 FIG. 7 is a flow chart showing a control operation of the lens device 40 executed by the lens control unit 16. The CPU (not shown) of the lens control unit 16 executes the control operation of the lens device 40 according to the program stored in the ROM (not shown). FIG. 7 will explain the change of the aperture value in the lens device 40 and the rotation process of the aperture device 13.

絞り値の変更および絞り装置１３の回転処理が開始されると、レンズ制御部１６は、レンズ装置４０に設けられたスイッチ１５からの入力情報を取得する。Ｓ１０１で、レンズ制御部１６は、入力情報に基づいて、レンズ装置４０のモードが、撮影者が撮影中に絞り値を変更可能な第１モードであるか、絞り値を変更せずに光条の向きや開口形状のボケの向きを変更可能な第２モードであるかを判断する。 When the change of the aperture value and the rotation process of the aperture device 13 are started, the lens control unit 16 acquires the input information from the switch 15 provided in the lens device 40. In S101, the lens control unit 16 determines whether the mode of the lens device 40 is the first mode in which the photographer can change the aperture value during shooting, or the ray system without changing the aperture value. It is determined whether it is the second mode in which the direction of the lens and the direction of the blur of the opening shape can be changed.

Ｓ１０１においてレンズ装置４０のモードが第１モードであると判断された場合、レンズ制御部１６は、以下に説明する絞り値変更処理を実行する。レンズ制御部１６は、第１回転情報検出部材２０から、固定筒１８に対するカム板１９の第１回転位相情報を取得する。レンズ制御部１６は、第２回転情報検出部材２２から、固定筒１８に対する絞り羽根支持筒２１の第２回転位相情報を取得する。Ｓ１０２で、レンズ制御部１６は、カム板１９の第１回転位相情報と絞り羽根支持筒２１の第２回転位相情報との回転位相差に基づいて、絞り指標環１４を回転する前の現在の絞り値を算出し、ＲＡＭ（記憶部）に記憶する。ここで、レンズ制御部１６は、回転位相差に基づいて、現在のボケ形状の方向や光条の生じる方向を判断してもよい。また、カム板１９と絞り羽根支持筒２１の回転位相差を直接検出する回転情報検出部材がレンズ装置４０に設けられていてもよい。 When it is determined in S101 that the mode of the lens device 40 is the first mode, the lens control unit 16 executes the aperture value changing process described below. The lens control unit 16 acquires the first rotation phase information of the cam plate 19 with respect to the fixed cylinder 18 from the first rotation information detection member 20. The lens control unit 16 acquires the second rotation phase information of the diaphragm blade support cylinder 21 with respect to the fixed cylinder 18 from the second rotation information detection member 22. In S102, the lens control unit 16 is the current one before rotating the aperture index ring 14 based on the rotational phase difference between the first rotational phase information of the cam plate 19 and the second rotational phase information of the aperture blade support cylinder 21. The aperture value is calculated and stored in the RAM (storage unit). Here, the lens control unit 16 may determine the direction of the current blurred shape and the direction in which the striations are generated, based on the rotational phase difference. Further, the lens device 40 may be provided with a rotation information detecting member that directly detects the rotation phase difference between the cam plate 19 and the diaphragm blade support cylinder 21.

Ｓ１０３で、レンズ制御部１６は、第１エンコーダ１７から、絞り指標環１４が光軸ＯＡを中心に回転させられたときの絞り指標環１４の回転量を取得する。Ｓ１０４で、レンズ制御部１６は、絞り指標環１４の回転量とＲＡＭに記憶された絞り値に基づいて、カム板１９の回転量を算出する。Ｓ１０５で、レンズ制御部１６は、算出されたカム板１９の回転量に基づいて、第１アクチュエータ２３によってカム板１９を回転させる。このとき、絞り羽根支持筒２１が固定筒１８に対して光軸ＯＡを中心に回転しないように絞り羽根支持筒２１が固定筒１８に対して固定される。実施例１と同様に、カム板１９が絞り羽根支持筒２１に対して光軸ＯＡを中心に第１アクチュエータ２３によって回転させられることによって、絞りの開口の径（開口面積）が変化し、絞り値が変更される。 In S103, the lens control unit 16 acquires the amount of rotation of the aperture index ring 14 when the aperture index ring 14 is rotated about the optical axis OA from the first encoder 17. In S104, the lens control unit 16 calculates the rotation amount of the cam plate 19 based on the rotation amount of the aperture index ring 14 and the aperture value stored in the RAM. In S105, the lens control unit 16 rotates the cam plate 19 by the first actuator 23 based on the calculated rotation amount of the cam plate 19. At this time, the diaphragm blade support cylinder 21 is fixed to the fixed cylinder 18 so that the diaphragm blade support cylinder 21 does not rotate about the optical axis OA with respect to the fixed cylinder 18. Similar to the first embodiment, the cam plate 19 is rotated by the first actuator 23 with respect to the diaphragm blade support cylinder 21 about the optical axis OA, so that the diameter (opening area) of the aperture of the diaphragm is changed and the diaphragm is stopped. The value is changed.

Ｓ１０１においてレンズ装置４０のモードが第２モードであると判断された場合、レンズ制御部１６は、以下に説明する絞り装置回転処理を実行する。絞り装置回転処理においては、絞り値は変更されない。レンズ制御部１６は、第１回転情報検出部材２０から、固定筒１８に対するカム板１９の第１回転位相情報を取得する。レンズ制御部１６は、第２回転情報検出部材２２から、固定筒１８に対する絞り羽根支持筒２１の第２回転位相情報を取得する。Ｓ１０６で、レンズ制御部１６は、カム板１９の第１回転位相情報と絞り羽根支持筒２１の第２回転位相情報との回転位相差に基づいて、絞り羽根支持筒２１を回転する前の現在の絞り値を算出し、ＲＡＭ（記憶部）に記憶する。ＲＡＭに記憶された絞り値は、スイッチ１５によってレンズ装置４０のモードが第２モードから、絞り値を変更可能な第１モードへ切り替えられたときに、正しい絞り値が示されるように使用される。 When it is determined in S101 that the mode of the lens device 40 is the second mode, the lens control unit 16 executes the aperture device rotation process described below. The aperture value is not changed in the aperture rotation process. The lens control unit 16 acquires the first rotation phase information of the cam plate 19 with respect to the fixed cylinder 18 from the first rotation information detection member 20. The lens control unit 16 acquires the second rotation phase information of the diaphragm blade support cylinder 21 with respect to the fixed cylinder 18 from the second rotation information detection member 22. In S106, the lens control unit 16 is currently before rotating the diaphragm blade support cylinder 21 based on the rotation phase difference between the first rotation phase information of the cam plate 19 and the second rotation phase information of the diaphragm blade support cylinder 21. The aperture value of is calculated and stored in the RAM (storage unit). The aperture value stored in the RAM is used so that the correct aperture value is shown when the mode of the lens device 40 is switched from the second mode to the first mode in which the aperture value can be changed by the switch 15. ..

Ｓ１０７で、レンズ制御部１６は、第２エンコーダ２５から、絞り指標指示環２４が光軸ＯＡを中心に回転させられたときの絞り指標指示環２４の回転量を取得する。実施例２の絞り指標指示環２４は、絞り羽根支持筒２１と機械的に連結されていないので、絞り指標指示環２４は、絞り羽根支持筒２１と独立して回転される。Ｓ１０８で、レンズ制御部１６は、絞り指標指示環２４の回転量に基づいて、絞り羽根支持筒２１の回転量を算出する。Ｓ１０９で、レンズ制御部１６は、算出された絞り指標指示環２４の回転量に基づいて、第２アクチュエータ２６によって絞り羽根支持筒２１を回転させる。このとき、レンズ制御部１６は、絞り羽根支持筒２１と同じ回転方向に同じ回転角度だけ、第１アクチュエータ２３によってカム板１９を回転させる。もし、カム板１９と絞り羽根支持筒２１が相対的に回転してカム板１９と絞り羽根支持筒２１の相対位置が変化すると、絞りの開口の径が変化する。そこで、絞りの開口の径が変化しないように絞り羽根支持筒２１とカム板１９を同じ回転方向に同じ回転量だけ回転させることによって、絞り開口の径を維持したまま光軸ＯＡまわりの絞りの開口形状の角度が変更される。 In S107, the lens control unit 16 acquires the amount of rotation of the aperture index indicating ring 24 when the aperture index indicating ring 24 is rotated about the optical axis OA from the second encoder 25. Since the aperture index indicating ring 24 of the second embodiment is not mechanically connected to the aperture blade support cylinder 21, the aperture index indicating ring 24 is rotated independently of the aperture blade support cylinder 21. In S108, the lens control unit 16 calculates the amount of rotation of the aperture blade support cylinder 21 based on the amount of rotation of the aperture index indicating ring 24. In S109, the lens control unit 16 rotates the diaphragm blade support cylinder 21 by the second actuator 26 based on the calculated rotation amount of the diaphragm index indicating ring 24. At this time, the lens control unit 16 rotates the cam plate 19 by the first actuator 23 in the same rotation direction as the diaphragm blade support cylinder 21 by the same rotation angle. If the cam plate 19 and the diaphragm blade support cylinder 21 rotate relative to each other and the relative positions of the cam plate 19 and the diaphragm blade support cylinder 21 change, the diameter of the aperture of the diaphragm changes. Therefore, by rotating the diaphragm blade support cylinder 21 and the cam plate 19 in the same rotation direction by the same amount of rotation so that the diameter of the diaphragm opening does not change, the diaphragm around the optical axis OA is rotated while maintaining the diameter of the diaphragm opening. The angle of the aperture shape is changed.

実施例２によれば、絞り装置１３が絞り指標指示環２４と機械的に接続していない場合であっても、撮影の効果としてのボケ形状の方向や光条の生じる方向を連続で３６０度以上回転することができる。実施例２によれば、絞りの開口形状の方向を任意に回転可能なレンズ装置４０を提供することができる。 According to the second embodiment, even when the aperture device 13 is not mechanically connected to the aperture index indicator ring 24, the direction of the blur shape and the direction in which the striations are generated as an effect of photographing are continuously 360 degrees. It can rotate more than that. According to the second embodiment, it is possible to provide a lens device 40 capable of arbitrarily rotating the direction of the aperture shape of the diaphragm.

２固定筒
４絞り羽根支持筒
５絞り羽根
６カム板
３０レンズ装置
ＯＡ光軸 2 Fixed cylinder 4 Aperture blade support cylinder 5 Aperture blade 6 Cam plate 30 Lens device OA optical axis

Claims

With multiple diaphragm blades that make up the aperture diaphragm,
An accommodating member accommodating the plurality of diaphragm blades, and
A holding member that holds the accommodating member and
A cam member that changes the diameter of the opening formed by the plurality of diaphragm blades by being rotated around the optical axis, and
Have,
The lens device is characterized in that the accommodating member is rotatably held around the optical axis with respect to the holding member.

An operating member operated to rotate the cam member and
A reference member that serves as a reference for the operation of the operation member, and
It has a connecting member that connects the operating member, the reference member, and the accommodating member.
The reference member is rotatably held around the optical axis with respect to the holding member.
The first aspect of the present invention, wherein the accommodating member is rotatably held around the optical axis with respect to the holding member together with the operating member and the reference member connected by the connecting member. Lens device.

The connecting member has a first state in which the reference member and the holding member are fixed so that the reference member does not rotate with respect to the holding member, and the reference member is around the optical axis with respect to the holding member. The lens apparatus according to claim 2, wherein the lens apparatus has a second state that allows rotation.

The lens device according to claim 3, wherein when the connecting member is in the first state, the diameter of the opening is changed by rotating the operating member around the optical axis.

The third or fourth aspect of the present invention, wherein the connecting member transitions between the first state and the second state via the threaded portion by forming a threaded portion and rotating the connecting member. Lens device.

The lens device according to claim 5, wherein the connecting member connects the operating member and the reference member when the connecting member is in the second state.

An operating member operated to rotate the cam member and
A first detection unit that detects the operation amount of the operation member, and
A first actuator that rotates the cam member based on the operation amount detected by the first detection unit, and
The lens device according to claim 1, wherein the lens device comprises.

A reference member that serves as a reference for the operation of the operation member, and
A second detection unit that detects the amount of rotation of the reference member, and
A second actuator that rotates the accommodating member based on the amount of rotation detected by the second detection unit, and
Have,
The lens device according to claim 7, wherein the first actuator rotates the cam member based on the amount of rotation.

The lens apparatus according to claim 7 or 8, further comprising a storage unit for storing information regarding the diameter of the opening formed by the plurality of diaphragm blades.

The lens device according to any one of claims 1 to 9.
An image sensor that captures the image formed by the lens device,
An imaging device characterized by having.