JP2020012999A - Aperture device, lens device, and image capturing device - Google Patents

Aperture device, lens device, and image capturing device Download PDF

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JP2020012999A
JP2020012999A JP2018135507A JP2018135507A JP2020012999A JP 2020012999 A JP2020012999 A JP 2020012999A JP 2018135507 A JP2018135507 A JP 2018135507A JP 2018135507 A JP2018135507 A JP 2018135507A JP 2020012999 A JP2020012999 A JP 2020012999A
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aperture
diaphragm
blades
cam
rotation center
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JP7204362B2 (en
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佑典 小西
Yusuke Konishi
佑典 小西
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Canon Inc
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Canon Inc
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Abstract

To provide an aperture device which is advantageous, for example, in reducing friction resistance among aperture blades.SOLUTION: An aperture device of the present invention comprises: a plurality of aperture blades, each having a drive pin and a rotation center pin; a support member for rotatably supporting the rotation center pins; a cam member having cams to be engaged with the drive pins; and a separation member for separating two of the aperture blades from the rest.SELECTED DRAWING: Figure 2

Description

本発明は、絞り装置、レンズ装置、および撮像装置に関するものである。   The present invention relates to an aperture device, a lens device, and an imaging device.

従来より、回転軸を備えた複数枚の絞り羽根を同一円周上に等角度間隔に配置し、絞り羽根の回転軸の周りの絞り羽根の回転によって、絞り羽根の重なりで形成される絞り開口を変更する絞り装置が知られている。このような絞り装置では、絞り羽根に二種類のピンが備えられており、一方のピンに対する他方のピンの動きをカム溝でガイドする構造が一般的である。絞り開口の形状は、撮影により得られた映像における主被写体の周囲のボケ味の良さに影響し、当該形状が円形に近いほど綺麗なボケ味を得ることができる。絞り開口の形状を円形に近付けるには、絞り羽根の枚数を多くするのが一般的である。また、特にＴＶ放送用途では、絞り羽根が開閉する全域にわたり、絞り羽根による光芒の乱れが少ないことが求められている。また、モータ駆動によってカム板を駆動する絞り装置では、モータに要する駆動トルクを軽減して消費電力を小さくすることが求められている。特許文献１は、絞り羽根とカム板又は固定板との間に配したガイドプレートにより、絞り羽根の開閉に対する摩擦抵抗を軽減する絞り装置を開示している。   Conventionally, a plurality of diaphragm blades each having a rotation axis are arranged at equal angular intervals on the same circumference, and the rotation of the diaphragm blades around the rotation shaft of the diaphragm blades causes the diaphragm aperture formed by the overlapping of the diaphragm blades. There is known an aperture device for changing the pressure. In such a diaphragm device, the diaphragm blade is provided with two types of pins, and a structure in which the movement of the other pin with respect to one pin is guided by a cam groove is general. The shape of the aperture opening affects the degree of blurring around the main subject in an image obtained by shooting, and the closer the shape is to a circular shape, the more beautiful blurring can be obtained. To make the shape of the aperture opening close to a circle, it is common to increase the number of aperture blades. In particular, in TV broadcasting applications, it is required that light beams are not disturbed by the aperture blades over the entire area where the aperture blades open and close. Also, in a diaphragm device that drives a cam plate by driving a motor, it is required to reduce the driving torque required for the motor to reduce power consumption. Patent Literature 1 discloses a diaphragm device that reduces a frictional resistance to opening and closing of the diaphragm blade by a guide plate disposed between the diaphragm blade and a cam plate or a fixed plate.

特開２０１２−１１３１０２号公報JP 2012-113102 A

特許文献１に開示された絞り装置では、絞り羽根どうしの摩擦は低減されない。そのため、開口径が小さくなるに従って、羽根の重なりの増加によって羽根の摺動抵抗が増加し、モータには大きな駆動トルクが必要となる。   In the diaphragm device disclosed in Patent Document 1, the friction between the diaphragm blades is not reduced. Therefore, as the opening diameter becomes smaller, the sliding resistance of the blades increases due to the increase in the overlap of the blades, and a large driving torque is required for the motor.

本発明は、例えば、絞り羽根どうしの摩擦抵抗の低減に有利な絞り装置を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to provide a diaphragm device which is advantageous for reducing, for example, frictional resistance between diaphragm blades.

本発明の絞り装置は、駆動ピンと回転中心ピンとをそれぞれが有する複数の絞り羽根と、前記回転中心ピンを回転可能に支持する支持部材と、前記駆動ピンに係合するカムを有するカム部材と、前記複数の絞り羽根のうちの２つの絞り羽根を仕切る仕切部材と、を有
することを特徴とする。 A diaphragm device of the present invention includes a plurality of diaphragm blades each having a drive pin and a rotation center pin, a support member rotatably supporting the rotation center pin, a cam member having a cam engaged with the drive pin, And a partition member for partitioning two of the plurality of aperture blades.

本発明によれば、例えば、絞り羽根どうしの摩擦抵抗の低減に有利な絞り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 diaphragm device that is advantageous for reducing frictional resistance between diaphragm blades.

本発明における絞り装置の正面図である。It is a front view of the diaphragm device in the present invention. 本発明における絞り装置の分解斜視図である。FIG. 2 is an exploded perspective view of the diaphragm device according to the present invention. 本発明における絞り装置の縦断面図である。It is a longitudinal section of a diaphragm device in the present invention. 本発明における絞り装置の縦断面図の拡大図である。FIG. 2 is an enlarged view of a vertical cross-sectional view of the diaphragm device according to the present invention. 本発明におけるカム板の正面図である。It is a front view of the cam board in the present invention. 本発明における絞り羽根の正面図である。It is a front view of the diaphragm blade in this invention. 本発明における絞り羽根支持筒の正面図である。It is a front view of the diaphragm blade support cylinder in this invention. 本発明におけるシート部材上の羽根駆動範囲を示す図である。FIG. 6 is a diagram illustrating a blade driving range on a sheet member according to the present invention.

以下に、本発明の好ましい実施の形態を添付の図面に基づいて詳細に説明する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

以下、図１から図８を参照して本発明の実施例による絞り装置について説明する。本実施例における絞り装置の正面図を図１に、分解斜視図を図２に、縦断面図を図３に、縦断面図の拡大図を図４に示す。   Hereinafter, a diaphragm device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view, FIG. 2 is an exploded perspective view, FIG. 3 is a longitudinal sectional view, and FIG. 4 is an enlarged view of the longitudinal sectional view of the diaphragm device in this embodiment.

絞り装置１は、不図示のフォーカスレンズ群やズームレンズ群、リレーレンズ群などを含むレンズ装置（レンズ系）の開口径を決めており、絞り開口形状を連続的に変化させる絞り駆動部である。   The aperture device 1 determines the aperture diameter of a lens device (lens system) including a focus lens group, a zoom lens group, a relay lens group, and the like (not shown), and is an aperture drive unit that continuously changes the aperture shape. .

図２に示すように、絞り装置１は絞り羽根支持筒（羽根支持部材）２と、複数の絞り羽根３ａ、３ｂと、カム板（カム部材）４と、押え金具５と、シート部材（仕切部材）６を有する。図３と図４に示すように、複数の絞り羽根３ａ、３ｂとシート部材６は、絞り羽根支持筒２とカム板４との間に挟持される。カム板４は中心軸ｏを中心に絞り羽根支持筒２の内径部の内部で回転し、絞り羽根支持筒２に対する中心軸ｏ方向の移動は、内径部に対して位置決めされる押え金具５で規制される。押え金具５はＣリング状となっており、絞り羽根支持筒２の内径部に、Ｃリング部分の開口部を狭めるように変形させて挿入し、その変形を開放して元の形状に戻すことで絞り羽根支持筒２に対して固定する。   As shown in FIG. 2, the aperture device 1 includes an aperture blade support cylinder (vane support member) 2, a plurality of aperture blades 3a and 3b, a cam plate (cam member) 4, a presser fitting 5, a sheet member (partitioning member). Member 6). As shown in FIGS. 3 and 4, the plurality of aperture blades 3 a and 3 b and the sheet member 6 are sandwiched between the aperture blade support cylinder 2 and the cam plate 4. The cam plate 4 rotates around the central axis o inside the inner diameter portion of the diaphragm blade supporting cylinder 2, and the movement of the cam plate 4 in the direction of the central axis o with respect to the diaphragm blade supporting cylinder 2 is performed by the presser fitting 5 positioned with respect to the inner diameter portion. Be regulated. The presser fitting 5 has a C-ring shape, and is deformed and inserted into the inner diameter portion of the diaphragm blade supporting tube 2 so as to narrow the opening of the C-ring portion, and the deformation is released to return to the original shape. To fix it to the aperture blade support cylinder 2.

図５にカム板４の正面図を示す。カム板４は２種類の最小径の異なるカム溝を有しており、カム溝４ａを６本、遮光用のカム溝４ｂを３本の構成となっている。図６に絞り羽根３ａ、３ｂの正面図を示す。複数の絞り羽根３ａ、３ｂには、絞り羽根支持筒２に設けられたピン穴２ａと回転可能に係合する回転中心ピン３ｃと、カム板４のカム溝４ａ、４ｂに摺動可能に係合する駆動ピン３ｄが一体となって構成されている。   FIG. 5 shows a front view of the cam plate 4. The cam plate 4 has two types of cam grooves having different minimum diameters, six cam grooves 4a and three light shielding cam grooves 4b. FIG. 6 shows a front view of the aperture blades 3a and 3b. A plurality of aperture blades 3a and 3b are engaged with a rotation center pin 3c rotatably engaged with a pin hole 2a provided in the aperture blade support cylinder 2, and slidably engage with cam grooves 4a and 4b of the cam plate 4. The corresponding driving pins 3d are integrally formed.

図７に絞り羽根支持筒２の正面図を示す。絞り羽根支持筒２のピン穴２ａは同一円周上に設けられ、それぞれの穴の位置の、光軸位置に対応する開口部中心の周りの位相間隔は互いに等しく、絞り羽根３ａ、３ｂの内縁部の重なりで形成する絞り開口形状を略円形とする。以上の構成によって、カム板４のカム溝４ａ、４ｂに沿って絞り羽根３ａ、３ｂの駆動ピン３ｄが摺動し、絞り開口形状を変化させる。カム溝４ａ、４ｂの特徴として、最小径部は光軸ｏを中心とする同心円に配置される。ここで、カム溝４ｂはカム溝４ａと比べて、最小径部が小さい溝形状であり、絞り羽根３ｂによって遮光する際に使用する。カム溝４ｂは、絞り羽根支持筒２に設けられたピン穴２ａに対して等分で設けられており、絞り羽根３ｂによって光路を遮蔽する際に三角形の開口形状を有しながら開口部を小さくして遮光する。本実施例では、カム溝４ａ、４ｂの本数を合計で９本とし、遮光用に使用するカム溝４ｂを３本としたがこの限りではなく、絞り羽根３ａ、３ｂの枚数や遮光用のカム溝４ｂを増減しても良い。   FIG. 7 shows a front view of the diaphragm blade supporting cylinder 2. The pin holes 2a of the aperture blade supporting cylinder 2 are provided on the same circumference, and the positions of the respective holes are equal in phase interval around the center of the opening corresponding to the optical axis position, and the inner edges of the aperture blades 3a, 3b The shape of the aperture opening formed by the overlapping portions is substantially circular. With the above configuration, the drive pins 3d of the aperture blades 3a, 3b slide along the cam grooves 4a, 4b of the cam plate 4, and change the aperture opening shape. As a feature of the cam grooves 4a and 4b, the minimum diameter portion is arranged concentrically around the optical axis o. Here, the cam groove 4b has a groove shape having a smaller minimum diameter portion than the cam groove 4a, and is used when the diaphragm blade 3b shields light. The cam groove 4b is provided evenly with respect to the pin hole 2a provided in the aperture blade support cylinder 2, and when the optical path is blocked by the aperture blade 3b, the aperture is reduced while having a triangular aperture shape. And shield from light. In this embodiment, the number of the cam grooves 4a and 4b is nine in total, and the number of the cam grooves 4b used for light shielding is three. However, the number of the cam grooves 4a and 4b is not limited thereto. The groove 4b may be increased or decreased.

図８にシート部材６上に絞り羽根３ａが駆動する軌跡を示す。本発明における絞り装置では、９枚の絞り羽根３ａ、３ｂの内、遮光用のカム溝４ｂに係合する絞り羽根３ｂの１枚のみをシート部材６によって仕切ることで、残り８枚の絞り羽根３ａ、３ｂと光軸方向に駆動面を分割する。図８に、絞り開口形状を最大とする位置から遮光する位置まで絞り羽根３ａが駆動する範囲（領域Ａ）と、絞り羽根３ａの先端が駆動する範囲（領域Ａ１）を示す。シート部材６は、１枚のみ光軸方向に分割した絞り羽根３ｂの駆動ピン３ｄが貫通して動く領域を逃げる逃げ溝（逃げ部）６ａと、９枚の絞り羽根３ａ、３ｂの各回転中心ピン３ｃが貫通して逃げる逃げ穴（逃げ部）６ｂを有している。すなわち、シート部材（仕切部材）は複数の絞り羽根のうちの２つの絞り羽根を仕切り、２つの絞り羽根のうちの一方の駆動ピン３ｄと、他方の回転中心ピン３ｃとを逃げる逃げ部が形成されている。逃げ溝６ａは領域Ａ１に重ならない範囲に設けられ、絞りの開口形状を変化させる際に、絞り羽根３ａが逃げ溝６ａ上に掛からない形状としている。シート部材６の逃げ穴６ｂは絞り羽根３ａ、３ｂの内、２カ所以上の回転中心ピン３ｃと嵌合する設定とし、絞り羽根３ａ、３ｂに対する偏心を抑制する。また、絞り装置１において、絞り羽根３ａ、３ｂではなくシート部材６によって最大開口径を形成し、絞り羽根内径による不要な迷光を抑制する。   FIG. 8 shows a trajectory on which the diaphragm blade 3 a is driven on the sheet member 6. In the aperture device according to the present invention, only one of the nine aperture blades 3a and 3b engaged with the light-shielding cam groove 4b is partitioned by the sheet member 6, so that the remaining eight aperture blades are provided. The drive surface is divided in the optical axis direction with 3a and 3b. FIG. 8 shows a range in which the diaphragm blade 3a is driven from a position where the aperture opening shape is maximized to a position where light is shielded (region A), and a range in which the tip of the diaphragm blade 3a is driven (region A1). The sheet member 6 includes an escape groove (escape portion) 6a for escaping an area where the drive pin 3d of the aperture blade 3b, which is divided into only one sheet in the optical axis direction, moves, and rotation centers of the nine aperture blades 3a and 3b. The pin 3c has an escape hole (escape portion) 6b through which the pin 3c escapes. That is, the sheet member (partition member) partitions two of the plurality of aperture blades, and a relief portion is formed to escape one of the drive pins 3d and the other rotation center pin 3c of the two aperture blades. Have been. The relief groove 6a is provided in a range that does not overlap the area A1, and has a shape such that the aperture blade 3a does not engage on the relief groove 6a when the aperture shape of the aperture is changed. The escape hole 6b of the sheet member 6 is set so as to be fitted with two or more rotation center pins 3c among the aperture blades 3a and 3b, thereby suppressing eccentricity with respect to the aperture blades 3a and 3b. Further, in the diaphragm device 1, the maximum aperture diameter is formed by the sheet member 6 instead of the diaphragm blades 3a and 3b, and unnecessary stray light due to the diaphragm blade inner diameter is suppressed.

本実施例では、シート部材６を１枚のみ構成して絞り羽根３ａ、３ｂを光軸方向に二つに分割しているがこの限りではなく、２枚以上のシート部材６を構成し、絞り羽根３ａ、３ｂを光軸方向に複数分割しても良い。この場合、絞り羽根による開口形状を遮光するまで略円形に保つことができ、遮光するまで綺麗なボケ味を得ることができる。シート部材６は絞り羽根３ａ、３ｂを光軸方向へ分割する用途として利用できれば良く、樹脂材料や金属材料、フィルム等を利用可能であり、絞り羽根３ａ、３ｂと同程度の厚みがあれば良い。   In this embodiment, only one sheet member 6 is formed and the diaphragm blades 3a and 3b are divided into two in the optical axis direction. However, the present invention is not limited thereto. The blades 3a and 3b may be divided into a plurality in the optical axis direction. In this case, the aperture shape of the aperture blade can be maintained in a substantially circular shape until the light is shielded, and a beautiful bokeh can be obtained until the light is shielded. The sheet member 6 may be used as long as it can be used for dividing the diaphragm blades 3a and 3b in the optical axis direction, and a resin material, a metal material, a film, and the like can be used, and it is sufficient that the sheet member 6 has the same thickness as the diaphragm blades 3a and 3b. .

以上の構造により、本実施例の絞り装置における絞り開口の変化について説明する。絞り羽根支持筒２に対してカム板４を光軸中心ｏ回りに回転させると、絞り羽根３ａ、３ｂの駆動ピン３ｄはカム溝４ａ、４ｂによりそれぞれ案内される。それにより、絞り羽根３ａ、３ｂは回転中心ピン３ｃを軸として回動し、カム溝４ａ、４ｂの軌跡に沿って絞り羽根３ａ、３ｂが揺動して絞り開口径を変化させる。   A description will be given of a change in the aperture of the aperture device according to the present embodiment with the above structure. When the cam plate 4 is rotated around the optical axis center o with respect to the aperture blade support cylinder 2, the drive pins 3d of the aperture blades 3a, 3b are guided by the cam grooves 4a, 4b, respectively. Thus, the diaphragm blades 3a and 3b rotate around the rotation center pin 3c as an axis, and the diaphragm blades 3a and 3b swing along the trajectories of the cam grooves 4a and 4b to change the aperture diameter.

次に、絞り開口径を最大開口径から遮光させる方向へカム板４を回動させる場合について説明する。カム板４を回動させると、絞り羽根３ｂによって遮光する前に、絞り羽根３ａの駆動ピン３ｄがカム溝４ａの最小径位置まで案内される。この状態からさらにカム板４を回動させると、絞り羽根３ｂの駆動ピン３ｄはカム溝４ｂに沿って案内され、カム溝４ｂの最小径位置まで案内される。最小径部のカム溝４ａは光軸ｏを中心に設けられているため、カム溝４ａと係合している絞り羽根３ａはカム板４の回動と連動して揺動せず、カム溝４ｂと係合する絞り羽根３ｂのみ揺動することによって遮光する。   Next, a case where the cam plate 4 is rotated in the direction of blocking the aperture opening diameter from the maximum opening diameter will be described. When the cam plate 4 is rotated, the drive pin 3d of the diaphragm blade 3a is guided to the minimum diameter position of the cam groove 4a before blocking light by the diaphragm blade 3b. When the cam plate 4 is further rotated from this state, the drive pin 3d of the diaphragm blade 3b is guided along the cam groove 4b, and is guided to the minimum diameter position of the cam groove 4b. Since the cam groove 4a of the smallest diameter portion is provided around the optical axis o, the diaphragm blade 3a engaged with the cam groove 4a does not swing in conjunction with the rotation of the cam plate 4, and the cam groove Light is blocked by swinging only the diaphragm blade 3b engaged with the diaphragm 4b.

本実施例では、カム板４を回転させて絞り羽根３ａ、３ｂを開閉しているがこの限りではなく、カム板４を固定し、絞り羽根支持筒２を回転させる構造でも良い。この場合は、絞り羽根支持筒２と一体となってシート部材６が回転する構造となる。   In the present embodiment, the diaphragm blades 3a and 3b are opened and closed by rotating the cam plate 4, but the present invention is not limited to this, and a structure in which the cam plate 4 is fixed and the diaphragm blade support cylinder 2 is rotated may be used. In this case, the structure is such that the sheet member 6 rotates integrally with the aperture blade supporting cylinder 2.

本実施例の絞り装置によれば、絞り羽根３ａ、３ｂの間にシート部材６を設けることで、絞り羽根３ａ、３ｂどうしが重なり合う羽根枚数を低減し、絞り羽根どうしの摺動抵抗を抑制できる。また、絞り装置にシート部材６を追加構成するのみであり、絞り羽根どうしの摺動抵抗による動作不良を抑制でき、簡単な構成で安定した光量調整を可能とした絞り装置を提供できる。   According to the aperture device of the present embodiment, by providing the sheet member 6 between the aperture blades 3a and 3b, the number of blades in which the aperture blades 3a and 3b overlap each other can be reduced, and the sliding resistance between the aperture blades can be suppressed. . Further, only the sheet member 6 is additionally provided in the aperture device, an operation failure due to sliding resistance between the aperture blades can be suppressed, and an aperture device capable of performing stable light quantity adjustment with a simple configuration can be provided.

また、上述した実施例の絞り装置を含むレンズ装置と、該レンズ装置の像面に配された撮像素子と、を有する撮像装置により、本発明の絞り装置の効果を享受できる撮像装置を提供することができる。   Further, an image pickup apparatus that can enjoy the effects of the stop apparatus of the present invention is provided by an image pickup apparatus including the lens device including the stop device of the above-described embodiment and an image pickup device arranged on the image plane of the lens device. be able to.

以上、本発明の好ましい実施形態について説明したが、本発明はこれらの実施形態に限定されず、その要旨の範囲内で種々の変形および変更が可能である。   The preferred embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist.

１：絞り装置
２：絞り羽根支持筒（支持部材）
２ａ：ピン穴
３ａ：絞り羽根
３ｂ：絞り羽根（遮光用）
３ｃ：回転中心ピン
３ｄ：駆動ピン
４：カム板（カム部材）
６：シート部材（仕切部材） 1: diaphragm device 2: diaphragm blade support cylinder (support member)
2a: Pin hole 3a: Aperture blade 3b: Aperture blade (for light shielding)
3c: rotation center pin 3d: drive pin 4: cam plate (cam member)
6: Sheet member (partition member)

Claims (8)

駆動ピンと回転中心ピンとをそれぞれが有する複数の絞り羽根と、
前記回転中心ピンを回転可能に支持する支持部材と、
前記駆動ピンに係合するカムを有するカム部材と、
前記複数の絞り羽根のうちの２つの絞り羽根を仕切る仕切部材と、
を有することを特徴とする絞り装置。 A plurality of aperture blades each having a drive pin and a rotation center pin,
A support member that rotatably supports the rotation center pin,
A cam member having a cam engaged with the drive pin;
A partition member for partitioning two of the plurality of aperture blades;
A diaphragm device comprising: 前記仕切部材は、前記２つの絞り羽根のうち、一方の前記駆動ピンと、他方の前記回転中心ピンとを逃げる逃げ部が形成されていることを特徴とする請求項１に記載の絞り装置。   2. The aperture device according to claim 1, wherein the partition member has an escape portion that escapes one of the drive pins and the other of the rotation center pins of the two aperture blades. 3. 前記仕切部材と前記支持部材との間に、前記複数の絞り羽根のうちの少なくとも１つの絞り羽根を有することを特徴とする請求項１または２に記載の絞り装置。   The aperture device according to claim 1, further comprising at least one aperture blade of the plurality of aperture blades between the partition member and the support member. 前記駆動ピンを逃げる逃げ部は、前記回転中心ピンを中心とした前記他方の回転の軌跡とは重ならないように形成されていることを特徴とする請求項２に記載の絞り装置。   The aperture device according to claim 2, wherein the escape portion that escapes from the drive pin is formed so as not to overlap with the other rotation locus about the rotation center pin. 前記仕切部材は、その内径によって最大開口径を決めるように構成されていることを特徴とする請求項１乃至４のうちいずれか１項に記載の絞り装置。   The diaphragm device according to any one of claims 1 to 4, wherein the partition member is configured to determine a maximum opening diameter according to an inner diameter thereof. 前記仕切部材は、前記複数の絞り羽根のうちの少なくとも２つの前記回転中心ピンを逃げていることを特徴とする請求項１乃至５のうちいずれか１項に記載の絞り装置。   The diaphragm device according to any one of claims 1 to 5, wherein the partition member has escaped at least two of the rotation center pins of the plurality of diaphragm blades. レンズ系と、
前記レンズ系の開口を形成するための請求項１乃至６のうちいずれか１項に記載の絞り装置と、
を含むことを特徴とするレンズ装置。 Lens system,
An aperture device according to any one of claims 1 to 6, for forming an opening of the lens system,
A lens device comprising: 請求項７に記載のレンズ装置と、
前記レンズ装置の像面に配された撮像素子と、
を含むことを特徴とする撮像装置。 A lens device according to claim 7,
An image sensor arranged on an image plane of the lens device;
An imaging device comprising:
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000250093A (en) * 1999-02-25 2000-09-14 Canon Inc Light quantity control device and optical equipment equipped with the same
JP2002277924A (en) * 2001-03-21 2002-09-25 Asahi Optical Co Ltd Lens shutter mechanism
JP2007057656A (en) * 2005-08-23 2007-03-08 Seiko Epson Corp Optical diaphragm device and projector
JP2013228493A (en) * 2012-04-24 2013-11-07 Seiko Precision Inc Diaphragm device and optical apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000250093A (en) * 1999-02-25 2000-09-14 Canon Inc Light quantity control device and optical equipment equipped with the same
JP2002277924A (en) * 2001-03-21 2002-09-25 Asahi Optical Co Ltd Lens shutter mechanism
JP2007057656A (en) * 2005-08-23 2007-03-08 Seiko Epson Corp Optical diaphragm device and projector
JP2013228493A (en) * 2012-04-24 2013-11-07 Seiko Precision Inc Diaphragm device and optical apparatus

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