JPH04360132A - Diaphragm device for electronic still camera - Google Patents
Diaphragm device for electronic still cameraInfo
- Publication number
- JPH04360132A JPH04360132A JP3136386A JP13638691A JPH04360132A JP H04360132 A JPH04360132 A JP H04360132A JP 3136386 A JP3136386 A JP 3136386A JP 13638691 A JP13638691 A JP 13638691A JP H04360132 A JPH04360132 A JP H04360132A
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- plate
- hole
- shielding
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007787 solid Substances 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005375 photometry Methods 0.000 description 1
Landscapes
- Diaphragms For Cameras (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、電子スチルカメラの絞
り装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aperture device for an electronic still camera.
【０００２】0002
【従来の技術】電子スチルカメラは、ＣＣＤイメージセ
ンサ等の固体撮像素子に結像された静止画像を光電変換
し、得られたビデオ信号を磁気ディスク等の記録媒体に
記録する。固体撮像素子は一般にダイナミックレンジが
狭く、撮影時には正確な露光制御が要求される。2. Description of the Related Art An electronic still camera photoelectrically converts a still image formed on a solid-state imaging device such as a CCD image sensor, and records the resulting video signal on a recording medium such as a magnetic disk. Solid-state image sensors generally have a narrow dynamic range and require accurate exposure control when photographing.
【０００３】電子スチルカメラの露光制御は、一般には
露光時間と絞りとの組み合わせによるプログラム露光に
よって行われる。露光時間を変えるにはセンサシャッタ
を用いて固体撮像素子の電荷蓄積時間を調節する。しか
し、センサーシャッタを用いた電子スチルカメラでは、
固体撮像素子には電荷蓄積時間終了後にも被写体光が照
射されたままの状態となっている。このため、撮影の前
後にわたって固体撮像素子の電荷蓄積部や電荷転送路及
びその周囲にノイズ電荷が発生しやすい。そして、これ
らのノイズ電荷が電荷転送路に漏れ込むと、いわゆるス
ミアノイズとなって再生画像の品質を大幅に低下させて
しまう。Exposure control for electronic still cameras is generally performed by program exposure using a combination of exposure time and aperture. To change the exposure time, a sensor shutter is used to adjust the charge accumulation time of the solid-state image sensor. However, with electronic still cameras that use sensor shutters,
The solid-state image sensor continues to be irradiated with object light even after the charge accumulation time has ended. For this reason, noise charges are likely to be generated in the charge storage section, charge transfer path, and the surrounding area of the solid-state image sensor before and after photographing. When these noise charges leak into the charge transfer path, they become so-called smear noise, which significantly degrades the quality of reproduced images.
【０００４】この為、本件出願人は次のようなターレッ
ト式の絞り装置を提案した。撮影が行われるときには、
測光結果に対応した開口径のもつ絞り孔が光路に挿入さ
れ、固体撮像素子の電荷蓄積の開始とともに露光が開始
される。電荷蓄積時間が経過すると、絞り駆動手段が作
動して絞り板が変位し、撮影に用いられた絞り孔に代わ
って絞り板の互いに隣接する絞り孔の間に形成された遮
蔽部が撮影光路内に入り込み、ＣＣＤは遮光状態となる
。従って、電荷蓄積時間の終了後には固体撮像素子に不
要な光は一切照射されることがない。[0004] For this reason, the applicant proposed the following turret type diaphragm device. When shooting takes place,
A diaphragm hole with an aperture diameter corresponding to the photometry result is inserted into the optical path, and exposure is started at the same time as charge accumulation in the solid-state image sensor starts. When the charge accumulation time has elapsed, the aperture driving means is activated to displace the aperture plate, and the shielding part formed between the adjacent aperture holes of the aperture plate replaces the aperture hole used for photographing, and the aperture plate is moved into the photographing optical path. The light enters the CCD, and the CCD becomes in a light-shielded state. Therefore, after the charge accumulation time ends, no unnecessary light is irradiated onto the solid-state image sensor.
【０００５】[0005]
【発明が解決しようとする課題】しかし、このような電
子スチルカメラのターレット式絞り機構は円盤のターレ
ット式絞り板に、必要な絞り孔と遮蔽部を形成するので
、絞り板が大型になる欠点がある。そこで、ターレット
式絞り板を小さくするため、光漏れがない程度に絞り孔
同志を近づけ、更に絞りの遮光部は設置しない絞り板が
ある。その場合フィールド撮影は問題ないが、フレーム
撮影でスメアやフリッカーを発生していた。[Problems to be Solved by the Invention] However, the turret-type diaphragm mechanism of such an electronic still camera has the disadvantage that the necessary diaphragm hole and shielding part are formed in the turret-type diaphragm plate, which makes the diaphragm plate large. There is. Therefore, in order to reduce the size of the turret-type aperture plate, there is an aperture plate in which the aperture holes are brought close to each other to the extent that there is no light leakage, and in addition, there is no light-shielding part of the aperture. In that case, there was no problem with field shooting, but smear and flicker occurred when shooting frames.
【０００６】即ち、電子スチルカメラのフレーム撮影を
行う場合ＣＣＤの信号はＡフィールド、Ｂフィールド順
に読み出される。Ａフィールドを読み出している時に、
Ｂフィールドの信号はイメージ部に残ったままになって
おり、絞り穴からの光がＢフィールドの信号に影響を及
ぼし、スメアやフリッカー発生してしまう。本発明は、
小型化の為に絞り穴を近接し、更に遮光部を設置してい
ないターレット式絞り板を有する絞り装置において、撮
影終了後瞬時に遮蔽板により露光用開口部を遮光するこ
とによりフレーム撮影でのスメアやフリッカーをなくす
ことを目的とする。That is, when frame photography is performed with an electronic still camera, CCD signals are read out in the order of A field and B field. When reading field A,
The B field signal remains in the image area, and the light from the aperture hole affects the B field signal, causing smear and flicker. The present invention
In an aperture device that has a turret-type aperture plate that has an aperture hole close to each other for downsizing and does not have a light-shielding part, the exposure aperture is immediately blocked from light by a shielding plate after the shooting is completed, making it possible to improve frame photography. The purpose is to eliminate smear and flicker.
【０００７】[0007]
【課題を解決するための手段】本発明は、前記目的を達
成する為に、被写体を固体撮像素子により撮像して得ら
れた電気信号をビデオ信号に変換して記録媒体に記録す
る電子スチルカメラに於いて、外周にギアが刻設される
と共に、露光用開口部を通過する被写体光を制限するた
めの複数の絞り孔が設けられたターレット式絞り板と、
外周にギアが刻設されると共に前記絞り板と同軸に配置
され、絞り板の各絞り孔より夫々大きい円形孔を有する
と共に、各円形孔間に遮光部が形成された遮光板と、か
ら成り、撮影時には絞り板の選択された絞り孔より大き
い遮光板の円形孔が位置して露光を可能とし、撮影終了
後には遮蔽板の円形孔間の遮光部により露光用開口部を
閉じることを特徴とする。[Means for Solving the Problems] In order to achieve the above object, the present invention provides an electronic still camera that captures an image of a subject using a solid-state imaging device, converts the obtained electrical signal into a video signal, and records the video signal on a recording medium. a turret-type aperture plate having gears carved on its outer periphery and a plurality of aperture holes for restricting subject light passing through the exposure aperture;
a light-shielding plate having a gear engraved on its outer periphery, arranged coaxially with the aperture plate, having circular holes each larger than each aperture hole of the aperture plate, and having a light-shielding portion formed between each circular hole; , during photography, a circular hole in the shielding plate larger than the selected aperture hole in the aperture plate is positioned to enable exposure, and after photography is completed, the exposure aperture is closed by a shielding portion between the circular holes in the shielding plate. shall be.
【０００８】[0008]
【作用】本発明では、撮影時には絞り板の所定の絞り孔
を開口する遮蔽板の円形孔が選択されて露光される。撮
影が終了し、絞り板と遮蔽板とを差動回転させると、遮
蔽板の遮蔽部が露光用開口部を覆う位置にくる。In the present invention, during photographing, a circular hole in the shielding plate that opens a predetermined aperture in the aperture plate is selected and exposed. When the photographing is finished and the aperture plate and the shielding plate are differentially rotated, the shielding part of the shielding plate comes to a position covering the exposure opening.
【０００９】[0009]
【実施例】以下、添付図面に従って本発明に係る電子ス
チルカメラの絞り装置の好ましい実施例を詳説する。図
１、図２に示すように、ターレット式絞り板１０はアイ
リス地板１２に支軸１４を介して回転自在に支持されて
いる。前記アイリス地板１２には、２相励磁のステッピ
ングモータ１６が取付けられ、図２に示すようにこのス
テッピングモータ１６は絞り板１０に対してアイリス地
板１２の裏面に固定される。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an aperture device for an electronic still camera according to the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the turret type diaphragm plate 10 is rotatably supported by the iris base plate 12 via a support shaft 14. As shown in FIGS. A two-phase excitation stepping motor 16 is attached to the iris base plate 12, and as shown in FIG. 2, this stepping motor 16 is fixed to the back surface of the iris base plate 12 with respect to the aperture plate 10.
【００１０】前記ステッピングモータ１６の出力軸１８
には図１、図２に示すように２段ギア２０が固着されて
おり、この２段ギア２０の上段ギア２０Ａは前記絞り板
１０の全周縁に刻設されたギア１０Ａに噛合されている
。これにより、ステッピングモータ１６の回転駆動力が
前記ギア２０Ａ、１０Ａを介して絞り板１０に伝達され
、絞り板１０は前記支軸１４を回転軸として回転するこ
とができる。Output shaft 18 of the stepping motor 16
As shown in FIGS. 1 and 2, a two-stage gear 20 is fixed to the two-stage gear 20, and an upper gear 20A of the two-stage gear 20 is meshed with a gear 10A carved on the entire periphery of the aperture plate 10. . Thereby, the rotational driving force of the stepping motor 16 is transmitted to the aperture plate 10 via the gears 20A, 10A, and the aperture plate 10 can rotate about the support shaft 14 as a rotation axis.
【００１１】尚、前記アイリス地板１２には図示しない
フォトインタラプタが固定され、このフォトインタラプ
タにより絞り板１０に形成された図示しない切欠き部が
検出され、且つステッピングモータ１６が或る励磁相に
なる時点より絞り板１０のホームポジションを検出する
ようにしている。ところで、前記ターレット式絞り板１
０には大小複数の絞り孔２２、２４、２６、２８、３０
、３２が同心円上に、所定の間隔で、且つ大小交互に形
成される。絞り孔２２はＦ２、絞り孔２４はＦ８、絞り
孔２６はＦ２．８、絞り孔２８はＦ１１、絞り孔３０は
Ｆ４、絞り孔３２はＦ５．６用の絞り孔の大きさに形成
されている。前記絞り孔２２乃至３２の各中心は、絞り
板１０が回動した際に、前記アイリス地板１２に形成さ
れた開口部３４の中心と一致する位置に形成される。A photo-interrupter (not shown) is fixed to the iris base plate 12, and this photo-interrupter detects a notch (not shown) formed in the aperture plate 10, and the stepping motor 16 enters a certain excitation phase. The home position of the aperture plate 10 is detected from this point onwards. By the way, the turret type aperture plate 1
0 has multiple large and small aperture holes 22, 24, 26, 28, 30.
, 32 are formed concentrically at predetermined intervals and in alternating sizes. The aperture hole 22 is F2, the aperture hole 24 is F8, the aperture hole 26 is F2.8, the aperture hole 28 is F11, the aperture hole 30 is F4, and the aperture hole 32 is formed to the size of an F5.6 aperture hole. There is. The centers of each of the aperture holes 22 to 32 are formed at positions that coincide with the centers of the openings 34 formed in the iris base plate 12 when the aperture plate 10 rotates.
【００１２】支軸１４には遮蔽板３６が回動自在に支持
され、遮蔽板３６の周縁にはギア３６Ａが刻設されてい
る。このギア３６Ａは２段ギア２０の下段ギア２０Ｂと
噛合い、ステッピングモータ１６の回転駆動力が前記ギ
ア２０Ｂ、３６Ａを介して遮蔽板３６に伝達され、遮蔽
板３６は前記支軸１４を回転軸として回転することが出
来る。A shielding plate 36 is rotatably supported on the support shaft 14, and a gear 36A is carved on the periphery of the shielding plate 36. This gear 36A meshes with the lower gear 20B of the two-stage gear 20, and the rotational driving force of the stepping motor 16 is transmitted to the shield plate 36 via the gears 20B and 36A, and the shield plate 36 uses the support shaft 14 as the rotation axis. It can be rotated as
【００１３】この遮蔽板３６には円形孔３８、４０、４
２が形成される。円形孔３８は、絞り孔２２（Ｆ２）、
絞り孔２８（Ｆ１１）を開口できる大きさに形成され、
円形孔４０は絞り孔２４（Ｆ８）、絞り孔３０（Ｆ４）
を開口できる大きさに形成され、円形孔４２は絞り孔３
２（Ｆ５．６）、絞り孔２６（Ｆ２．８）を開口できる
大きさに形成される。前記円形孔３８乃至４２の各中心
は、遮蔽板１０が回動した際に、前記アイリス板１２に
形成された開口部３４の中心と一致する位置に形成され
る。This shielding plate 36 has circular holes 38, 40, 4.
2 is formed. The circular hole 38 is the aperture hole 22 (F2),
It is formed in a size that allows opening of the aperture hole 28 (F11),
The circular hole 40 is the aperture hole 24 (F8) and the aperture hole 30 (F4).
The circular hole 42 is formed in a size that can open the aperture hole 3.
2 (F5.6) and aperture hole 26 (F2.8). The centers of the circular holes 38 to 42 are formed at positions that coincide with the centers of the openings 34 formed in the iris plate 12 when the shielding plate 10 rotates.
【００１４】また、ギア２０Ａ、２０Ｂ、絞り板１０の
ギア１０Ａ、遮蔽板３６のギア３６Ａの各歯数比は次の
ように設定される。
即ち、
Ｚ１０Ａ＝絞り板１０のギア１０Ａの歯数Ｚ３６Ａ＝絞
り板３６のギア３６Ａの歯数Ｚ２０Ａ＝２段ギア２０の
ギア２０Ａの歯数Ｚ２０Ｂ＝２段ギア２０のギア２０Ｂ
の歯数とする時、
Ｚ１０Ａ＋Ｚ２０Ａ＝Ｚ３６Ａ＋Ｚ２０ＢFurther, the ratio of the number of teeth of the gears 20A, 20B, the gear 10A of the aperture plate 10, and the gear 36A of the shielding plate 36 is set as follows. That is, Z10A=number of teeth of gear 10A of aperture plate 10 Z36A=number of teeth of gear 36A of aperture plate 36 Z20A=number of teeth of gear 20A of two-stage gear 20 Z20B=gear 20B of two-stage gear 20
When the number of teeth is Z10A+Z20A=Z36A+Z20B
【００１５】[0015]
【式１】
なる関係で歯数を構成し、絞り板１０と遮蔽板３６の差
動回転によって遮蔽部を形成する。The number of teeth is configured according to the following relationship, and a shielding portion is formed by differential rotation of the aperture plate 10 and the shielding plate 36.
【００１６】次に、前記の如く構成された電子スチルカ
メラの絞り装置の作用について説明する。尚、図１に示
すようにターレット式絞り板１０の絞り孔２０、２４、
２６、２８、３０、３２は６０度のピッチで形成され、
遮蔽板３６の円形孔３８、４０、４２は１２０度のピッ
チで形成されている。そして、ギア１０Ａ、２０Ａ、２
０Ｂ、３６Ａの歯数は各々Ｚ１０Ａ＝１２０、Ｚ２０Ａ
＝３０、Ｚ２０Ｂ＝５０、Ｚ３６Ａ＝１００に設定する
。Next, the operation of the aperture device of the electronic still camera constructed as described above will be explained. In addition, as shown in FIG. 1, the aperture holes 20, 24,
26, 28, 30, 32 are formed at a pitch of 60 degrees,
The circular holes 38, 40, and 42 of the shielding plate 36 are formed at a pitch of 120 degrees. And gears 10A, 20A, 2
The number of teeth for 0B and 36A is Z10A=120 and Z20A, respectively.
=30, Z20B=50, and Z36A=100.
【００１７】図１、図３では、絞り値は開放（Ｆ２）を
示しており、図１の状態からギア２０が時計方向に２４
０°回転すると、図４、図５に示すように絞り板１０は
反時計方向に回動して絞り孔２４（Ｆ８）が地板１２の
開口部３４の中心に位置する。この時、遮蔽板３６は、
絞り板２４より大きな円形孔４０が開口部３４の中心に
位置し、従って絞り値Ｆ８で撮影可能となる。In FIGS. 1 and 3, the aperture value is open (F2), and the gear 20 is rotated clockwise by 24 degrees from the state shown in FIG.
When rotated by 0°, the aperture plate 10 rotates counterclockwise as shown in FIGS. 4 and 5, and the aperture hole 24 (F8) is located at the center of the opening 34 of the main plate 12. At this time, the shielding plate 36 is
A circular hole 40 larger than the diaphragm plate 24 is located at the center of the opening 34, so that photography can be performed at an aperture value of F8.
【００１８】撮影が終了すると、図４、図５の位置から
ギア２０が反時計方向に１２０°回転し、図６、図７に
示すように、絞り板１０は時計方向に回動して開口部３
４の位置には絞り板２２と絞り孔２４とが位置する。し
かしながら、開口部３４は遮蔽板３６の円形孔３８と円
形孔４０との間の部分の遮光部によって覆われ、遮光状
態となる。When the photographing is completed, the gear 20 rotates 120° counterclockwise from the position shown in FIGS. 4 and 5, and the diaphragm plate 10 rotates clockwise to open the aperture, as shown in FIGS. 6 and 7. Part 3
At position 4, the aperture plate 22 and the aperture hole 24 are located. However, the opening 34 is covered by a light shielding portion between the circular hole 38 and the circular hole 40 of the shielding plate 36, and is in a light shielded state.
【００１９】絞り値が図１、図２の開放（Ｆ２）からギ
ア２０が時計方向に４８０°回転すると、図８、図９に
示すように絞り板１０は反時計方向に回動して絞り孔２
６（Ｆ２．８）が地板１２の開口部３４の中心に位置す
る。この時、遮蔽板３６は、絞り孔２６より大きな円形
孔４２が開口部３４の中心に位置し、従って絞り値Ｆ２
．８で撮影可能となる。When the gear 20 rotates 480° clockwise from the aperture value of the open (F2) shown in FIGS. 1 and 2, the diaphragm plate 10 rotates counterclockwise and closes the aperture as shown in FIGS. 8 and 9. Hole 2
6 (F2.8) is located at the center of the opening 34 of the main plate 12. At this time, the shielding plate 36 has a circular hole 42 larger than the aperture hole 26 located at the center of the opening 34, so that the aperture value F2
．． Shooting becomes possible at 8.
【００２０】撮影終了後、図８、図９の位置からギア２
０が反時計方向に１２０°回転すると、図１０、図１１
に示すように絞り板１０は時計方向に回動して開口部３
４の位置には絞り孔２４と絞り孔２６とが位置する。し
かしながら、開口部３４は遮蔽板３６の円形孔４０と円
形孔４２との間の部分の遮光部によって覆われ、遮光状
態となる。以下Ｆ５，６、Ｆ４、Ｆ１１各絞りも、ギア
２０の回転（時計回り方向、又は反時計回り方向）によ
る絞り板と遮光板の差動で、撮影と遮蔽が可能になる。After photographing, shift gear 2 from the position shown in FIGS. 8 and 9.
0 rotates 120 degrees counterclockwise, Figures 10 and 11
As shown in the figure, the aperture plate 10 rotates clockwise to
A throttle hole 24 and a throttle hole 26 are located at position 4. However, the opening 34 is covered by a light shielding portion between the circular hole 40 and the circular hole 42 of the shielding plate 36, and is in a light shielded state. The F5, F6, F4, and F11 diaphragms also enable photographing and shielding by differential movement between the diaphragm plate and the light shielding plate due to the rotation of the gear 20 (clockwise or counterclockwise).
【００２１】即ち、図１２に示すように、所定の露光時
間だけ露光されたＣＣＤのＡフィールドのフォトセルの
蓄積電荷は、フィールドシフトパルスによって時刻ｔ１
に転送路に転送され、その後時刻ｔ２ にストレイジ
部に高速に転送される（図１２（Ａ））。そして、スト
レイジ部に蓄えられた信号電荷は、ＣＣＤ出力として１
ラインずつ読み出される（図１２（Ｃ））。一方、Ａフ
ィールドと同じ時間だけ露光されたＣＣＤのＢフィール
ドのフォトセルの蓄電電荷は、フィールドシフトパルス
によって時刻ｔ３ に転送路に転送され、Ａフィールド
の読み出しが終了したのち、時刻ｔ４ にストレイジ部
に高速に転送される（図１２（Ｂ））。そして、ストレ
イジ部からＡフィールドと同様に１ラインずつ読み出さ
れる。That is, as shown in FIG. 12, the accumulated charge in the A-field photocell of the CCD exposed for a predetermined exposure time is changed by the field shift pulse at time t1.
The data is transferred to the transfer path at time t2, and then transferred to the storage unit at high speed at time t2 (FIG. 12(A)). The signal charge stored in the storage section is then output as a CCD output.
It is read out line by line (FIG. 12(C)). On the other hand, the stored charge in the B-field photocell of the CCD, which has been exposed for the same time as the A-field, is transferred to the transfer path at time t3 by a field shift pulse, and after the A-field readout is completed, the stored charge is transferred to the storage section at time t4. (FIG. 12(B)). Then, one line at a time is read out from the storage section in the same way as the A field.
【００２２】しかし、上記時刻ｔ３ からｔ４ までの
期間中、転送路には光が入射しているためスミア成分が
蓄積され、そのスミア成分だけＢフィールドの信号はＡ
フィールドの信号よりも大きくなる。そして、Ａフィー
ルドの信号とＢフィールドの信号を１ライン毎に交互に
読み出してフレーム信号を完成させると、１ライン置き
にスミア成分を含む信号が混合するため、水平走査線が
粗く見えるという画質低下を招く。However, during the period from time t3 to time t4, since light is incident on the transfer path, smear components are accumulated, and the B field signal is affected by the smear component.
be larger than the field signal. When the A field signal and the B field signal are read out alternately line by line to complete the frame signal, signals containing smear components are mixed every other line, resulting in a decrease in image quality in which horizontal scanning lines appear coarse. invite.
【００２３】そこで、撮影終了後、即ち、図１２（Ｄ）
に示すように、Ｂフィールドの露光終了時点（時刻ｔ３
）で、絞り板１０と遮蔽板３６とを差動回転させ、速
やかに地板１２の開口部３４を遮蔽し、スミア成分の混
入を阻止するようにしている。このように本発明では、
撮影終了後絞り板１０と遮蔽板３６とが差動回転して瞬
時に遮蔽板３６により開口部３４を遮光する。これによ
りフレーム撮影でのスメアやフリッカーをなくすことが
できる。Therefore, after the photographing is completed, that is, as shown in FIG. 12(D).
As shown in FIG.
), the diaphragm plate 10 and the shielding plate 36 are differentially rotated to quickly shield the opening 34 of the main plate 12 and prevent the smear component from entering. In this way, in the present invention,
After photographing is completed, the diaphragm plate 10 and the shielding plate 36 rotate differentially, and the opening 34 is instantly shielded from light by the shielding plate 36. This eliminates smear and flicker when shooting frames.
【００２４】[0024]
【発明の効果】以上説明したように本発明に係る電子ス
チルカメラの絞り装置によれば、撮影終了後、絞り板と
遮蔽板とが差動回転し、遮蔽板が直ちに露光用開口部を
覆うので、フレーム撮影でスメヤやフリッカが発生しな
い。また、絞り板に遮光部を設けないようにしたので絞
り板を小さく形成することができる。As explained above, according to the aperture device of the electronic still camera according to the present invention, after photographing is completed, the aperture plate and the shielding plate differentially rotate, and the shielding plate immediately covers the exposure opening. Therefore, smear and flicker do not occur when shooting frames. Furthermore, since the diaphragm plate is not provided with a light shielding portion, the diaphragm plate can be made smaller.
【図１】図１は本発明に係る電子スチルカメラの絞り装
置の実施例を示す正面図FIG. 1 is a front view showing an embodiment of an aperture device for an electronic still camera according to the present invention.
【図２】図２は図１の実施例の断面図[Fig. 2] Fig. 2 is a cross-sectional view of the embodiment shown in Fig. 1.
【図３】図３は図１のＡ−Ａ線に沿う断面図[Figure 3] Figure 3 is a cross-sectional view taken along line A-A in Figure 1.
【図４】図
４は本発明に係る実施例の作用を示す正面図[Fig. 4] Fig. 4 is a front view showing the operation of the embodiment according to the present invention.
【図５】図
５は図４のＢ−Ｂ線に沿う断面図[Figure 5] Figure 5 is a cross-sectional view taken along line BB in Figure 4.
【図６】図６は本発明
に係る実施例の作用を示す正面図[Fig. 6] Fig. 6 is a front view showing the operation of the embodiment according to the present invention.
【図７】図７は図６の
Ｃ−Ｃ線に沿う断面図[Figure 7] Figure 7 is a cross-sectional view taken along line C-C in Figure 6.
【図８】図８は本発明に係る実施
例の作用を示す正面図[Fig. 8] Fig. 8 is a front view showing the operation of the embodiment according to the present invention.
【図９】図９は図８のＤ−Ｄ線に
沿う断面図[Figure 9] Figure 9 is a cross-sectional view taken along line D-D in Figure 8.
【図１０】図１０は本発明に係る実施例の作
用を示す正面図FIG. 10 is a front view showing the operation of the embodiment according to the present invention.
【図１１】図１１は図１０のＥ−Ｅ線に沿う断面図[Fig. 11] Fig. 11 is a cross-sectional view taken along line E-E in Fig. 10.
【図
１２】図１２は本発明に係る実施例の作用を説明するた
めに用いたタイミングチャートFIG. 12 is a timing chart used to explain the operation of the embodiment according to the present invention.
１０…絞り板 １６…ステッピングモータ ２２〜３２…絞り孔 ３４…開口部 ３６…遮蔽板 ３８〜４２…遮蔽板の円形孔 10...Aperture plate 16...Stepping motor 22-32...Aperture hole 34...Opening 36...shielding plate 38-42...Circular hole in shielding plate
Claims (1)
れた電気信号をビデオ信号に変換して記録媒体に記録す
る電子スチルカメラに於いて、外周にギアが刻設される
と共に、露光用開口部を通過する被写体光を制限するた
めの複数の絞り孔が設けられたターレット式絞り板と、
外周にギアが刻設されると共に前記絞り板と同軸に配置
され、絞り板の各絞り孔より夫々大きい円形孔を有する
と共に、各円形孔間に遮光部が形成された遮光板と、か
ら成り、撮影時には絞り板の選択された絞り孔より大き
い遮光板の円形孔が位置して露光を可能とし、撮影終了
後には遮蔽板の円形孔間の遮光部により露光用開口部を
閉じることを特徴とする電子スチルカメラの絞り装置。Claim 1: An electronic still camera that captures an image of a subject with a solid-state image sensor and converts the obtained electrical signal into a video signal and records it on a recording medium. a turret-type aperture plate provided with multiple aperture holes for restricting subject light passing through the aperture;
a light-shielding plate having a gear engraved on its outer periphery, arranged coaxially with the aperture plate, having circular holes each larger than each aperture hole of the aperture plate, and having a light-shielding portion formed between each circular hole; , during photography, a circular hole in the shielding plate larger than the selected aperture hole in the aperture plate is positioned to enable exposure, and after photography is completed, the exposure aperture is closed by a shielding portion between the circular holes in the shielding plate. Aperture device for electronic still cameras.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3136386A JPH04360132A (en) | 1991-06-07 | 1991-06-07 | Diaphragm device for electronic still camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3136386A JPH04360132A (en) | 1991-06-07 | 1991-06-07 | Diaphragm device for electronic still camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04360132A true JPH04360132A (en) | 1992-12-14 |
Family
ID=15173944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3136386A Pending JPH04360132A (en) | 1991-06-07 | 1991-06-07 | Diaphragm device for electronic still camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04360132A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002090806A (en) * | 2000-09-19 | 2002-03-27 | Nidec Copal Corp | Shutter device also used as diaphragm |
| JP2003029320A (en) * | 2001-07-19 | 2003-01-29 | Nidec Copal Corp | Camera device |
| JP2007086547A (en) * | 2005-09-22 | 2007-04-05 | Nidec Copal Corp | Light quantity adjusting device |
-
1991
- 1991-06-07 JP JP3136386A patent/JPH04360132A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002090806A (en) * | 2000-09-19 | 2002-03-27 | Nidec Copal Corp | Shutter device also used as diaphragm |
| JP2003029320A (en) * | 2001-07-19 | 2003-01-29 | Nidec Copal Corp | Camera device |
| JP2007086547A (en) * | 2005-09-22 | 2007-04-05 | Nidec Copal Corp | Light quantity adjusting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4571629A (en) | Rotary shutter device | |
| JPH07250341A (en) | White balance adjustment device for electronic camera | |
| JPH04360132A (en) | Diaphragm device for electronic still camera | |
| JP3018319B2 (en) | Photo equipment | |
| JPH03129977A (en) | Aperture device for electronic camera | |
| JPH0278375A (en) | Electronic still camera | |
| JPH0572625A (en) | Consecutive photographing camera | |
| JP3807861B2 (en) | Aperture device and shutter device | |
| JPH04336777A (en) | Diaphragm device for electronic still camera | |
| JPH07111616A (en) | Diaphragm device of electronic still camera | |
| JP2803689B2 (en) | Aperture device for electronic still camera | |
| JPH04330874A (en) | Diaphragm device of electronic still camera | |
| JPH04331587A (en) | Diaphragm device for electronic still camera | |
| JP2928864B2 (en) | Photo equipment | |
| JPH03184028A (en) | Still video camera | |
| JP2818706B2 (en) | Continuous shooting camera | |
| JPS5968725A (en) | Image pickup device | |
| JP2974143B2 (en) | Electronic imaging device | |
| JPS6151133A (en) | Rotary shutter device | |
| JPH03284073A (en) | Electronic still camera | |
| JP3563997B2 (en) | Camera exposure and light receiving surface adjustment mechanism | |
| JP3615962B2 (en) | Camera exposure and light receiving surface adjustment mechanism | |
| JP3563998B2 (en) | Camera exposure and light receiving surface adjustment mechanism | |
| JP2769396B2 (en) | Continuous shooting camera | |
| JPS60126974A (en) | Image pickup device |