JPH0267530A - Light quantity control diaphragm - Google Patents

Light quantity control diaphragm

Info

Publication number
JPH0267530A
JPH0267530A JP21913888A JP21913888A JPH0267530A JP H0267530 A JPH0267530 A JP H0267530A JP 21913888 A JP21913888 A JP 21913888A JP 21913888 A JP21913888 A JP 21913888A JP H0267530 A JPH0267530 A JP H0267530A
Authority
JP
Japan
Prior art keywords
aperture
filter
blade
diaphragm
blades
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.)
Granted
Application number
JP21913888A
Other languages
Japanese (ja)
Other versions
JPH0727154B2 (en
Inventor
Hitoshi Nozue
野末 均
Fumio Mochida
持田 文男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Electronics Inc
Original Assignee
Canon Electronics Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Electronics Inc filed Critical Canon Electronics Inc
Priority to JP63219138A priority Critical patent/JPH0727154B2/en
Publication of JPH0267530A publication Critical patent/JPH0267530A/en
Publication of JPH0727154B2 publication Critical patent/JPH0727154B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Diaphragms For Cameras (AREA)
  • Blocking Light For Cameras (AREA)

Abstract

PURPOSE:To eliminate the adverse influence of the title diaphragm to peripheral members by mechanically uniting an ND filter with one diaphragm blade in a state where a part of the ND filter gets into an opening. CONSTITUTION:The position and dimensions of each long-groove section of an ND filter 2 are made equal to the position and dimensions of each corresponding long-groove section of a diaphragm blade 3 and each long-groove sections of the filter 2 and blade 3 are fitted on the same driving pin and guide pin. Thus the filter 2 makes the same operation as the blade 3 does. Moreover, the positional relation of the part 2a of the filter 2 which is overlapped on the blade 3 and used as a filter with the blade 3 during operations is always maintained in a fixed state. Therefore, the adverse influence of the diaphragm to peripheral members and erroneous light quantity adjustment can be prevented and, at the same time, the assembling works can be performed easily.

Description

【発明の詳細な説明】 (発明の利用分野) 本発明は、ビデオカメラ等の撮影機器に装備される光量
絞り装置、特に光量調整の為のNDにュートラル・デン
シティ)フィルタを有する光量絞り装置の改良に関する
ものである。
Detailed Description of the Invention (Field of Application of the Invention) The present invention relates to a light aperture device installed in a photographic device such as a video camera, and particularly to a light aperture device having a neutral density (ND) filter for adjusting the light amount. It is about improvement.

(発明の背景) 従来の光量絞り装置のN Dフィルタは、第4図に示す
様に絞り羽根3と該NDフィルタ19との間に接着剤2
0がつけられ、絞り羽根3からフィルタとして使用され
る部分19aがある一定量はみ出した状態で、取り付け
られる構成となっていた。
(Background of the Invention) As shown in FIG.
0 is attached, and the portion 19a used as a filter is attached with a certain amount protruding from the aperture blade 3.

前述した様に従来においては接着剤20を用いているた
めに、該接着剤20の量が多すぎた場合、NDフィルタ
接着後、この接着剤20がはみ出し、これをそのまま装
置内に組み込んだ場合、他の部分と接着剤20が粘着、
或は接触して絞り羽根の作動に悪影響を及ぼすことがあ
った。一方接着剤20の量が少なかった場合には、接着
強度不足となり、最悪の場合前記NDフィルタ19が剥
れることになる。
As mentioned above, in the conventional method, adhesive 20 is used, so if the amount of adhesive 20 is too large, this adhesive 20 will protrude after adhering the ND filter, and if it is incorporated into the device as it is. , the other parts and the adhesive 20 are sticky,
Otherwise, contact may adversely affect the operation of the aperture blades. On the other hand, if the amount of adhesive 20 is small, the adhesive strength will be insufficient, and in the worst case, the ND filter 19 will peel off.

上記のような問題を出さないためには、接着剤20の量
が常にはみ出しもせず、接着強度不足にもならない、あ
る一定量にしなければならず、そのためには組立工程上
、接着剤20の量をかなり厳しく管理しなければならな
い。
In order to avoid the above-mentioned problems, the amount of adhesive 20 must be kept at a certain level so that it does not overflow or lack adhesive strength. The quantity must be controlled very strictly.

また、NDフィルタ19の取付は位置は、絞り羽根3か
らある一定量はみ出る位置で、そのはみ出た部分19a
はフィルタとして使用される部分であるが、接着の場合
、その取付は位置にバラツキが生じ易く、そのため光量
調整に不都合が生じることがある。また、その位置のバ
ラツキを少しでも少なくするためには、NDフィルタ1
9の接着時に、該NDフィルタ19と絞り羽根3を治工
具等にセットして行わなければならなかった。
The ND filter 19 is installed at a position where it protrudes a certain amount from the aperture blades 3, and the protruding portion 19a
is a part used as a filter, but when it is attached with adhesive, the position tends to vary, which may cause problems in adjusting the amount of light. Also, in order to reduce the variation in the position as much as possible, the ND filter 1
9, the ND filter 19 and the aperture blades 3 had to be set in a jig or the like.

(発明の目的) 本発明の目的は、上述した問題点を解決し、周辺の部材
に悪影響を与えたり、光量調整がまちまちとなるといっ
た事を防止でき、しかもその組立作業を容易に行うこと
のできる光量絞り装置を提供することである。
(Objective of the Invention) The object of the present invention is to solve the above-mentioned problems, to prevent adverse effects on surrounding members and uneven light intensity adjustment, and to facilitate the assembly work. The object of the present invention is to provide a light amount diaphragm device that can reduce the amount of light.

(発明の特徴) 上記目的を達成するために、本発明は、NDフィルタを
、その一部が開口内に入るような状態で、一つの絞り羽
根に対し機械的にて一体化し、以て、NDフィルタと絞
り羽根が接着によってではなく、機械的によってその位
置関係が変わらないようにしたことを特徴とする。
(Characteristics of the Invention) In order to achieve the above object, the present invention mechanically integrates an ND filter with one aperture blade in such a state that a part of the ND filter enters the aperture. It is characterized in that the positional relationship between the ND filter and the aperture blades is not changed mechanically, rather than by adhesion.

また、NDフィルタを、一つの絞り羽根とほぼ同形状に
し、かつその一部が開口内に入るような位置において、
前記−つの絞り羽根に形成された、開口状態可変用の駆
動部材が嵌合する長溝部と一致する、同じく前記駆動部
材が嵌合する長溝部を形成し、以て、前記NDフィルタ
と絞り羽根の長溝部を前記駆動部材に嵌合することによ
り、これらの位置関係が変わらないようにすると共に、
これらの形状をほぼ同一形状にして前記作業の簡単化を
図ったことを特徴とする。
In addition, the ND filter is made into approximately the same shape as one aperture blade, and at a position where a part of the ND filter enters the aperture.
A long groove portion formed in the two aperture blades, into which the drive member for changing the aperture state is fitted, is formed to coincide with a long groove portion into which the drive member is fitted, and thus the ND filter and the aperture blade are fitted. By fitting the long groove portion of the drive member to the drive member, the positional relationship between these parts is kept unchanged, and
A feature of the present invention is that these shapes are made substantially the same to simplify the above-mentioned work.

(発明の実施例) 第1図は本発明の一実施例を示す分解斜視図であり、該
図において、1は光量絞り装置の静止構造体である絞り
地板、3.4は前記絞り地板1の長手方向に沿って相対
的に移動する絞り羽根、2は前記絞り羽根3とほぼ同形
状であるが、絞り羽根3と重ね合わせた時に該絞り羽根
3より2a部分がはみ出すような形状になっているND
フィルタ、5は絞り羽根3,4を駆動するためのモータ
、6.7はモータ5の回転軸13に取り付けられた駆動
アーム12に植設された駆動ビン、8゜9.10.11
は絞り羽根3.4及びNDフィルタ2の各長溝部2b、
2c、2d、3b、3c。
(Embodiment of the Invention) FIG. 1 is an exploded perspective view showing an embodiment of the present invention. In the figure, numeral 1 indicates an aperture base plate which is a stationary structure of a light amount diaphragm device, and numeral 3.4 indicates the aperture base plate 1. The aperture blade 2, which moves relatively along the longitudinal direction, has almost the same shape as the aperture blade 3, but when overlapped with the aperture blade 3, the part 2a protrudes from the aperture blade 3. ND
filter; 5 is a motor for driving the aperture blades 3 and 4; 6.7 is a drive bin mounted on the drive arm 12 attached to the rotating shaft 13 of the motor 5; 8°9.10.11
are the aperture blades 3.4 and the long groove portions 2b of the ND filter 2,
2c, 2d, 3b, 3c.

3d、4b、4c、4dに嵌合し、これらの動きをガイ
ドするためのガイドビンである。
This is a guide bin that fits into 3d, 4b, 4c, and 4d and guides their movements.

前記駆動ビン6にNDフィルタ2の長溝部2bと絞り羽
根3の長溝部3bが、又ガイドビン8゜9にはそれぞれ
NDフィルタ2の長溝部2C12d、絞り羽根3の長溝
部3c、3dが入るように組み込まれる。前記絞り羽根
4は、駆動ビン7に長溝部4bが、ガイドビン10.1
1にはそれぞれ長溝部4c、4dが入るように、絞り羽
根3の上から組み込まれる。絞り羽根4の上からは、絞
り羽根の抜は止めのための蓋(図示せず)が取り付けら
れる。
The long groove portion 2b of the ND filter 2 and the long groove portion 3b of the aperture blade 3 are inserted into the drive bin 6, and the long groove portion 2C12d of the ND filter 2 and the long groove portions 3c and 3d of the aperture blade 3 are inserted into the guide bin 8°9, respectively. It will be incorporated like this. The aperture blade 4 has a long groove 4b in the drive bin 7 and a guide bin 10.1.
1 is assembled from above the diaphragm blade 3 so that the long grooves 4c and 4d are inserted into the aperture blade 3, respectively. A lid (not shown) is attached to the top of the aperture blade 4 to prevent the aperture blade from being pulled out.

上記構成において、モータ5の回転軸13が時計方向に
回転した場合、駆動アーム12に植設された駆動ビン6
は図中左方向へ、駆動ビン7は図中右方向へ移動し、そ
れに伴い絞り羽根3とNDフィルタ2は左方向へ、絞り
羽根4は右方向へそれぞれ移動し、光学系の開口部であ
るところの絞り地板1の開口部la上に絞り羽根3の不
透明部3eと絞り羽根4の不透明部4eが出てきて、該
開口部1aを通る光量が減らされる。
In the above configuration, when the rotation shaft 13 of the motor 5 rotates clockwise, the drive pin 6 implanted in the drive arm 12
moves to the left in the figure, the drive bin 7 moves to the right in the figure, and accordingly the aperture blades 3 and ND filter 2 move to the left, and the aperture blades 4 move to the right. Opaque parts 3e of diaphragm blades 3 and opaque parts 4e of diaphragm blades 4 appear above a certain aperture la of aperture base plate 1, and the amount of light passing through the aperture 1a is reduced.

また逆にモータ5の回転軸が反時計方向へ回転した場合
は、前述と逆の作用により絞り羽根3とNDフィルタ2
は図中右方向へ、絞り羽根4は図中左方向へそれぞれ移
動し、絞り地板1の開口部la上に絞り羽根3の開放部
3fと絞り4の穴部4fが出てきて、開口部1aを通る
光量が増やされる。
Conversely, if the rotating shaft of the motor 5 rotates counterclockwise, the aperture blades 3 and the ND filter 2
moves to the right in the figure, and the aperture blade 4 moves to the left in the figure, and the opening 3f of the aperture blade 3 and the hole 4f of the aperture 4 come out above the opening la of the aperture base plate 1, and the opening The amount of light passing through 1a is increased.

前述のように、NDフィルタ2は、その各長溝部の位置
、寸法が、絞り羽根3の対応する各長溝部の位置、寸法
と同じになっており、またNDフィルタ2と絞り羽根3
の各長溝部は同一の駆動ビン、ガイドビンに嵌合されて
いるため、NDフィルタ2は絞り羽根3と全く同じ動作
を行うことになり、よって、NDフィルタ2の、絞り羽
根3と重ね合わせた場合のフィルタとしての使用される
28部分(はみ出した部分)の、上記動作中におりる該
絞り羽根3に対する位置関係は常に一定に保たれる。
As mentioned above, the position and dimensions of each long groove in the ND filter 2 are the same as the positions and dimensions of the corresponding long grooves in the aperture blade 3, and the ND filter 2 and the aperture blade 3
Since each of the long grooves of the ND filter 2 and the aperture blade 3 are fitted into the same drive bin and guide bin, the ND filter 2 performs exactly the same operation as the aperture blade 3. Therefore, the ND filter 2 and the aperture blade 3 overlap In this case, the positional relationship of the 28 portions (protruding portions) used as a filter with respect to the aperture blade 3 during the above operation is always kept constant.

第2図は絞り羽根が3枚から成る場合の本発明の他の実
施例を示すものであり、該実施例においてはそれ以上の
枚数から成る絞り羽根を有する光量絞り装置であっても
同様の効果を有するものである。
FIG. 2 shows another embodiment of the present invention in which the aperture blades are composed of three blades, and in this embodiment, even if the light quantity diaphragm device has a larger number of aperture blades, the same effect can be achieved. It is effective.

第2図において、14,15.16は絞り羽根、17は
、絞り羽根14とほぼ同形状であるが、重ね合わせられ
た場合、フィルタとして使用される部分17cがはみ出
すような形状をしたNDフィルタである。
In FIG. 2, 14, 15, and 16 are aperture blades, and 17 is an ND filter that has almost the same shape as the aperture blade 14, but has a shape such that a portion 17c used as a filter protrudes when overlapped. It is.

前記絞り羽根14〜16にはそれぞれ固定ビン(図示せ
ず)の入る丸穴14a、15a、16aと駆動ビン(図
示せず)の入る長溝部14b、15b、”16bが形成
されている。NDフィルタ17には絞り羽根14の丸穴
14aと長溝部14bと同じ位置に同寸法の丸穴17a
と長溝部17bが形成されており、絞り羽根14の丸穴
14aとNDフィルタ17の丸穴17aは同一の固定ビ
ンが入り、絞り羽根14の長溝部14bとNDフィルタ
17の長溝部17bには同一の駆動ビンが入る。このた
め、NDフィルタ17は絞り羽根14と全く同一の動作
を行うことになり、フィルタとして使用される部分17
cの前記絞り羽根14に対する位置関係は常に一定に保
たれる。
The aperture blades 14 to 16 are respectively formed with round holes 14a, 15a, 16a into which a fixed bottle (not shown) is inserted, and long grooves 14b, 15b, 16b into which a driving bottle (not shown) is inserted.ND The filter 17 has a round hole 17a of the same size at the same position as the round hole 14a of the aperture blade 14 and the long groove part 14b.
The same fixed bottle is inserted into the round hole 14a of the aperture blade 14 and the round hole 17a of the ND filter 17. The same drive bin is included. Therefore, the ND filter 17 performs exactly the same operation as the aperture blade 14, and the portion 17 used as a filter
The positional relationship of c with respect to the aperture blade 14 is always kept constant.

第3図は本発明の別の実施例の主要部分を示すものであ
り、該図において、3は絞り羽根、18は、前記絞り羽
根3の形状とはかなり違うが、長溝部の位置、寸法は同
一で、絞り羽根3と重ね合わせられた場合、フィルタと
して使用される部分18aが絞り羽根3よりはみ出すよ
うな形状をしたNDフィルタである。
FIG. 3 shows the main parts of another embodiment of the present invention, and in this figure, 3 indicates an aperture blade, and 18 indicates the position and dimensions of a long groove, although the shape is quite different from that of the aperture blade 3. are the same, and are ND filters having a shape such that when overlapped with the aperture blade 3, the portion 18a used as a filter protrudes from the aperture blade 3.

上記構成において、NDフィルタ18の各長溝部18a
〜18dには、絞り羽根3の各長溝部3b〜3dに入る
のと同一の駆動ビン、ガイドビンが入るため、NDフィ
ルタ18と絞り羽根3は全く同一の動作を行うことにな
り、NDフィルタ18のフィルタとして使用される部分
18aの、前記絞り羽根3に対する位置は常に一定に保
たれる。
In the above configuration, each long groove portion 18a of the ND filter 18
~18d contain the same drive bins and guide bins that enter the long grooves 3b to 3d of the aperture blade 3, so the ND filter 18 and the aperture blade 3 perform exactly the same operation, and the ND filter The position of the portion 18a used as a filter of 18 with respect to the aperture blade 3 is always kept constant.

本実施例によれば、NDフィルタを絞り羽根と同じよう
な形状にして、同一の動作を行う構成にしているため、
従来のようにNDフィルタと絞り羽根との接着が不要に
なり、接着剤を使用した場合の接着剤のはみ出し等各種
の問題が全くなくなる。また、NDフィルタのフィルタ
として使用される部分の、絞り羽根に対する位置は、該
装置に組み込むだけで位置決めでき、NDフィルタを接
着していた時に発生していた位置のバラツキや、接着時
にNDフィルタと絞り羽根を治工具等にセットするとい
う組立工程をなくすことができる。
According to this embodiment, the ND filter has a similar shape to the aperture blades and is configured to perform the same operation.
There is no need to bond the ND filter and the aperture blades as in the past, and various problems such as adhesive extrusion when using an adhesive are completely eliminated. In addition, the position of the part of the ND filter that is used as a filter relative to the aperture blades can be determined simply by incorporating it into the device. The assembly process of setting the aperture blades on a jig or the like can be eliminated.

(変形例) 上記実施例では、NDフィルタの形状を絞り羽根とほぼ
同一形状としたが、必ずしもこれに限るものではなく、
例えばフィルタに使用される部分が開口内に位置する状
態において、両部材の各々の長溝部の位置が同一となる
ような形状であってもよい。つまり各々の長溝部のみを
同一形状で、同一寸法とすれば良い。但し、本実施例の
ようにこれらをほぼ同形状とした方が組込み部材の殆ど
を共用でき、スペース的にも構造的にも有利なものとな
る。
(Modified example) In the above embodiment, the shape of the ND filter was made to be almost the same shape as the aperture blade, but it is not necessarily limited to this.
For example, the shape may be such that the positions of the long grooves of both members are the same when the portion used for the filter is located within the opening. In other words, it is only necessary to make each long groove part the same shape and the same size. However, if they are made to have substantially the same shape as in this embodiment, most of the built-in members can be shared, which is advantageous in terms of space and structure.

また、NDフィルタと絞り羽根の各々の長溝部に同一の
駆動部材、(駆動ビン)を嵌合することにより、これら
を一体的に構成しているが、フィルタに使用される部分
が開口内に位置する状態において、例えば第1図実施例
における長溝部3cと2c相当位置を螺子等により締め
付け、これらを一体的に構成しても良い。
In addition, by fitting the same driving member (drive bottle) into the long grooves of each of the ND filter and the aperture blade, they are configured as one unit, but the part used for the filter is inside the aperture. In the positioned state, for example, the long grooves 3c and 2c in the embodiment of FIG. 1 may be tightened with screws or the like, and these may be integrally constructed.

(発明の効果) 以上説明したように、本発明によれば、NDフィルタを
、その一部が開口内に入るような状態で、一つの絞り羽
根に対し機械的にて一体化し、以て、NDフィルタと絞
り羽根が接着によってではなく、機械的によってその位
置関係が変わらないようにし、また、NDフィルタを、
一つの絞り羽根とほぼ同形状にし、かつその一部が開口
内に入るような位置において、前記−つの絞り羽根に形
成された、開口状態可変用の駆動部材が嵌合する長溝部
と一致する、同じく前記駆動部材が嵌合する長溝部を形
成し、以て、前記NDフィルタと絞り羽根の長溝部を前
記駆動部材に嵌合することにより、これらの位置関係が
変わらないようにすると共に、これらの形状をほぼ同一
形状にして前記作業の簡単化を図ったから、周辺の部材
に悪影響を与えたり、光量調整がまちまちとなるといっ
た事を防止でき、しかもその組立作業を容易に行うこと
ができる。
(Effects of the Invention) As explained above, according to the present invention, the ND filter is mechanically integrated with one aperture blade in a state where a part of the ND filter enters the aperture. The positional relationship between the ND filter and the aperture blades should not be changed mechanically, rather than by adhesion, and the ND filter should be
The shape is approximately the same as one aperture blade, and at a position such that a part of the aperture blade fits into the aperture, it coincides with the long groove formed in the two aperture blades into which the drive member for changing the aperture state fits. Similarly, by forming a long groove portion into which the driving member fits, and thereby fitting the long groove portions of the ND filter and the aperture blade into the driving member, the positional relationship thereof is not changed, and Since these shapes are made almost the same to simplify the work described above, it is possible to prevent adverse effects on surrounding components and uneven light intensity adjustment, and also to facilitate the assembly work. .

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例を示す分解斜視図、第2図は
本発明の他の実施例の主要部分を示す分解斜視図、第3
図は本発明の別の実施例の主要部分を示す分解斜視図、
第4図は従来の光量絞り装置の主要部分を示す斜視図で
ある。 2・・・・・・NDフィルタ、3.4・・・・・・絞り
羽根、67・・・・・・駆動ビン、14〜16・・・・
・・絞り羽根、17.18・・・・・・NDフィルタ。 特許出願人 キャノン電子株式会社
FIG. 1 is an exploded perspective view showing one embodiment of the present invention, FIG. 2 is an exploded perspective view showing main parts of another embodiment of the invention, and FIG.
The figure is an exploded perspective view showing the main parts of another embodiment of the present invention.
FIG. 4 is a perspective view showing the main parts of a conventional light aperture device. 2...ND filter, 3.4...Aperture blade, 67...Drive bin, 14-16...
...Aperture blade, 17.18...ND filter. Patent applicant Canon Electronics Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] (1)相対的に駆動されて絞り開口の大きさを可変する
複数の絞り羽根と、該絞り羽根により形成された開口内
に配置されるNDフィルタとを備えた光量絞り装置にお
いて、前記NDフィルタを、その一部が開口内に入るよ
うな状態で、前記一つの絞り羽根に対し機械的にて一体
化したことを特徴とする光量絞り装置。
(1) In a light amount diaphragm device comprising a plurality of aperture blades that are relatively driven to vary the size of the aperture aperture, and an ND filter disposed within the aperture formed by the aperture blades, the ND filter is mechanically integrated with the one diaphragm blade, with a part of the diaphragm blade entering the aperture.
(2)相対的に駆動されて絞り開口の大きさを可変する
複数の絞り羽根と、該絞り羽根により形成された開口内
に配置されるNDフィルタとを備えた光量絞り装置にお
いて、前記NDフィルタを、前記一つの絞り羽根とほぼ
同形状にし、かつその一部が開口内に入るような位置に
おいて、前記一つの絞り羽根に形成された、開口状態可
変用の駆動部材が嵌合する長溝部と一致する、同じく前
記駆動部材が嵌合する長溝部を形成したことを特徴とす
る光量絞り装置。
(2) In a light amount diaphragm device comprising a plurality of aperture blades that are relatively driven to vary the size of the aperture aperture, and an ND filter disposed within the aperture formed by the aperture blades, the ND filter a long groove formed in the one aperture blade, in which the driving member for changing the aperture state fits, in a position where the aperture blade has substantially the same shape as the one aperture blade, and a part of the groove enters the aperture; A light amount diaphragm device characterized in that a long groove portion corresponding to the above-mentioned driving member is also formed into which the driving member fits.
JP63219138A 1988-09-01 1988-09-01 Light amount diaphragm device Expired - Lifetime JPH0727154B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63219138A JPH0727154B2 (en) 1988-09-01 1988-09-01 Light amount diaphragm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63219138A JPH0727154B2 (en) 1988-09-01 1988-09-01 Light amount diaphragm device

Publications (2)

Publication Number Publication Date
JPH0267530A true JPH0267530A (en) 1990-03-07
JPH0727154B2 JPH0727154B2 (en) 1995-03-29

Family

ID=16730822

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63219138A Expired - Lifetime JPH0727154B2 (en) 1988-09-01 1988-09-01 Light amount diaphragm device

Country Status (1)

Country Link
JP (1) JPH0727154B2 (en)

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US6817788B1 (en) 2003-05-29 2004-11-16 Nihon Seimitsu Sokki Co., Ltd. Diaphragm device
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01153532U (en) * 1988-04-15 1989-10-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01153532U (en) * 1988-04-15 1989-10-23

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