JPH02287447A - Diaphragm device - Google Patents
Diaphragm deviceInfo
- Publication number
- JPH02287447A JPH02287447A JP10939089A JP10939089A JPH02287447A JP H02287447 A JPH02287447 A JP H02287447A JP 10939089 A JP10939089 A JP 10939089A JP 10939089 A JP10939089 A JP 10939089A JP H02287447 A JPH02287447 A JP H02287447A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- segments
- light
- aperture
- shielded
- 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
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Diaphragms For Cameras (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明はビデオ力、メラあるいはカメラ一体型ビデオテ
ープレコーダ(以下、カメラ一体型VTRと称す)およ
び電子スチルカメラにおける露光制御を行うために用い
る絞り装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an aperture device used for controlling exposure in a video camera, a camera-integrated video tape recorder (hereinafter referred to as a camera-integrated VTR), and an electronic still camera. It is related to.
従来の技術
近年、ビデオテープレコーダ(以下VTRと称す)の普
及が目ざましく、またビデオカメラあるいはカメラ一体
型VTRのフルオート化および低価格化、さらに民生用
電子スチルカメラの普及開始により、カメラ撮りを楽し
む機会も増加している。カメラ操りを行う場合、簡単薙
実に撮れると言う点から自動露出(以下、AFと称す)
機構が不可欠な要素になりつつある。AF機構を正確に
動作させるためには通過光量を精度良(制御しなければ
ならず、そのために絞り装置が必要である。以下図面を
参照しながら従来の絞り装置の一例について説明する。2. Description of the Related Art In recent years, video tape recorders (hereinafter referred to as VTRs) have become rapidly popular, and video cameras and camera-integrated VTRs have become fully automatic and have become cheaper, and consumer electronic still cameras have become more widespread. Opportunities to enjoy it are also increasing. When operating the camera, automatic exposure (hereinafter referred to as AF) is used because it allows you to take pictures easily.
Mechanisms are becoming an essential element. In order to operate the AF mechanism accurately, the amount of passing light must be precisely controlled, and for this purpose a diaphragm device is required.An example of a conventional diaphragm device will be described below with reference to the drawings.
第4図は従来の絞り装置の構成を示す断面図である。ま
た第5図は第4図の断面図である。第4図、第5図にお
いて、絞り羽根1,2は本体3とカバー(図示せず)と
の間に摺動可能に挿入されている。4は絞り装置の開口
面積を制御するための絞りメータであり、ガルバノメー
タ等で構成されている。絞りメータ4の回転軸5にはレ
バー6が結合されており、回転軸5とともに回動する。FIG. 4 is a sectional view showing the configuration of a conventional diaphragm device. Further, FIG. 5 is a sectional view of FIG. 4. In FIGS. 4 and 5, the aperture blades 1 and 2 are slidably inserted between the main body 3 and a cover (not shown). Reference numeral 4 denotes an aperture meter for controlling the aperture area of the aperture device, and is composed of a galvanometer or the like. A lever 6 is coupled to the rotating shaft 5 of the aperture meter 4 and rotates together with the rotating shaft 5.
レバー6の両端に植設されたビン7a、7bは絞り羽根
1,2の各々端部に設けられた長穴8a。The bins 7a and 7b installed at both ends of the lever 6 are elongated holes 8a provided at the ends of the aperture blades 1 and 2, respectively.
8bに係合され絞りメータ4を駆動制御することにより
、絞り羽根1.2を各々逆方向にスライドさせ、入射光
量に応じて開口部9の面積を変えることができるよう構
成されている。By engaging with the aperture meter 8b and controlling the drive of the aperture meter 4, the aperture blades 1.2 are slid in opposite directions, and the area of the aperture 9 can be changed in accordance with the amount of incident light.
発明が解決しようとする課題
しかしながら上記のような構成では、絞りメータ4は空
間を大きく占める。また部品点数も多く精度も要求され
、組立工数もかかるのでコストアップになる。したがっ
て最近のビデオカメラあるいはカメラ一体型VTRの小
型軽量化、低コスト化等のさまたげとなる。また、絞り
羽根lおよび絞り羽根2は絞り本体3とカバーとのあい
だで常に摺動しているため耐久性、安定性などの点で非
常に問題がある。この耐久性、安定性といった要素は、
長時間連続使用することの多いビデオカメラやカメラ一
体型VTRにとって非常に重要である。Problems to be Solved by the Invention However, in the above configuration, the aperture meter 4 occupies a large amount of space. In addition, the number of parts is large, precision is required, and assembly man-hours are required, which increases costs. This hinders efforts to make recent video cameras or camera-integrated VTRs smaller, lighter, and lower in cost. Further, since the aperture blades 1 and 2 are constantly sliding between the aperture main body 3 and the cover, there are serious problems in terms of durability and stability. Elements such as durability and stability are
This is extremely important for video cameras and camera-integrated VTRs that are often used continuously for long periods of time.
本発明は上記課題を解消するもので、小型軽量かつ低コ
ストで耐久性、安定性の高い絞り装置を提供するもので
ある。The present invention solves the above problems and provides an aperture device that is small, lightweight, low cost, and highly durable and stable.
課題を解決するための手段
上記問題点を解決するために本発明の絞り装置は、開放
絞り径外は遮光された薄板と、前記薄板の開放絞り径内
を分割した複数のセグメントと、前記セグメントを電圧
印加時に遮光状態とし、電圧無印加時に透明状態とする
ための電圧制御手段という構成を有している。Means for Solving the Problems In order to solve the above-mentioned problems, the diaphragm device of the present invention includes a thin plate shielded from light outside the open aperture diameter, a plurality of segments obtained by dividing the thin plate inside the open aperture diameter, and the segments. It has a configuration of voltage control means for making it into a light shielding state when a voltage is applied and making it into a transparent state when no voltage is applied.
作用
この構成によって、通過光量の、IQ御が、各セグメン
トに印加する電圧のオン−オフを制御することにより機
構的に非接触で行える。したがって、非常に耐久性、安
定性の高い通過光量制御が可能である。Function: With this configuration, IQ control of the amount of light passing through can be performed mechanically without contact by controlling on/off of the voltage applied to each segment. Therefore, it is possible to control the amount of passing light with extremely high durability and stability.
また、近年の液晶、半導体技術の進歩により、受光素子
および発光素子は非常に小さく、低コストである。一方
、電圧制御部は本体と一体に形成すれば良いので部品点
数も少なく、組立工数も少な(できるため、非常に小型
計量化かつ低コストで通過光量を制御することができる
。Further, due to recent advances in liquid crystal and semiconductor technology, light receiving elements and light emitting elements have become extremely small and low cost. On the other hand, since the voltage control section can be formed integrally with the main body, the number of parts and the number of assembly steps can be reduced (this makes it possible to control the amount of passing light with very small size and low cost).
実施例
以下、本発明の一実施例について1図面を参照しながら
説明する。EXAMPLE Hereinafter, an example of the present invention will be described with reference to one drawing.
第1図は本発明の一実施例における絞り装置の構成を示
す平面図、第2図は第1図の断面図、第3図は動作説明
のための平面図を示すものである。FIG. 1 is a plan view showing the configuration of a diaphragm device in an embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1, and FIG. 3 is a plan view for explaining the operation.
第1図において、本体11の表面は黒色塗料等で遮光さ
れており、開放絞り径と最小絞り径との間が三つのセグ
メント12a、12b、12cに分割されている。最小
絞り径内13は常に透明状態となっており光が透過でき
るようになっている。第2図に示すように、三つのセグ
メント12a。In FIG. 1, the surface of the main body 11 is shaded with black paint or the like, and the area between the open aperture diameter and the minimum aperture diameter is divided into three segments 12a, 12b, and 12c. The inside of the minimum aperture diameter 13 is always in a transparent state so that light can pass therethrough. As shown in FIG. 2, three segments 12a.
12b、12cはそれぞれ電圧が無印加の時は透明で光
の透過状態にあり、陽電極部12’aに定電圧を印加す
ると液晶R12’bが再配列され、遮光状態となる。12b and 12c are transparent and transmit light when no voltage is applied, and when a constant voltage is applied to the positive electrode portion 12'a, the liquid crystals R12'b are rearranged and the liquid crystals R12'b are in a light-blocking state.
以上のように構成された本実施例の絞り装置の動作を説
明する。The operation of the aperture device of this embodiment configured as described above will be explained.
第3図において、三つのセグメント12a。In FIG. 3, three segments 12a.
12b、12cの全てが電圧無印加状態の時は(a)に
示すように、開放状態となる。When no voltage is applied to both 12b and 12c, they are in an open state as shown in (a).
次にセグメント12aだけが電圧印加状態の時(b)に
示すように、セグメント12aだけが遮光状態となり、
−段小絞りとなる。Next, when only the segment 12a is in the voltage applied state, as shown in (b), only the segment 12a is in the light shielding state,
-The aperture becomes smaller.
さらに三つのセグメント12a、12b、12cの全て
が電圧印加状態の時(C)に示すように、三つのセグメ
ント12a、12b、12cの全てが遮光状態となり、
最小絞りとなる。Further, when all three segments 12a, 12b, 12c are in a voltage applied state, as shown in (C), all three segments 12a, 12b, 12c are in a light shielding state,
Minimum aperture.
以上のように本実施例によれば、開放絞り径外は遮光さ
れた薄板11と、薄板11の開放絞り径内を分割したセ
グメント12 a T 12 b * 12 cと
、セグメント12a、12b、12cを電圧印加時に遮
光状態とし、電圧無印加時に透明状態とするための電圧
ill t1手段14とを設けることにより、レンズの
位置検出が非接触で行え、耐久性。As described above, according to this embodiment, the thin plate 11 is shielded from light outside the open aperture diameter, the segments 12 a T 12 b * 12 c, which are divided into the thin plate 11 inside the open aperture diameter, and the segments 12 a, 12 b, and 12 c. By providing a voltage illumination means 14 for making the lens into a light shielding state when a voltage is applied and making it into a transparent state when no voltage is applied, the position of the lens can be detected without contact and is durable.
安定性を高めることができ、部品点数も少なく、組立性
も良く、小型計量化かつ低コスト化することができる。Stability can be improved, the number of parts is small, assembly is easy, and it is possible to reduce size, weight, and cost.
発明の効果
以上のように本発明によれば、開放絞り径内を分割した
複数のセグメントと、前記セグメントを電圧印加時に遮
光状態とし、電圧無印加時に透明状態とするための電圧
制御手段とを設けることにより、通過光量制御が非接触
で行え、耐久性、安定性を高めることができ、部品点数
も少なく、組立性も良く、小型計量化かつ低コスト化す
ることができるという優れた絞り装置を実現できるもの
である。Effects of the Invention As described above, according to the present invention, a plurality of segments are formed by dividing the inside of an open aperture diameter, and voltage control means is provided for making the segments into a light-shielding state when a voltage is applied and into a transparent state when no voltage is applied. This is an excellent diaphragm device that allows non-contact control of the amount of light passing through, increases durability and stability, has fewer parts, is easy to assemble, and can be made smaller and weighed at a lower cost. It is possible to realize this.
第1図は本発明の一実施例における絞り装置の構成を示
す構成を示す平面図、第2図は第1図の断面図、第3図
は動作説明のための平面図、第4図は従来の絞り装置の
平面図、第5図は第4図の断面図である。
11・・・・・・本体、12a、12b、12c・・・
・・・セグメント、13・・・・・・最小絞り径、14
・・・・・・電圧制御部。
代理人の氏名 弁理士 粟野重孝 はが1名の ヮ
滅FIG. 1 is a plan view showing the configuration of an aperture device according to an embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1, FIG. 3 is a plan view for explaining the operation, and FIG. A plan view of a conventional diaphragm device, and FIG. 5 is a sectional view of FIG. 4. 11...Main body, 12a, 12b, 12c...
...Segment, 13...Minimum aperture diameter, 14
...Voltage control section. Name of agent: Patent attorney Shigetaka Awano
Claims (3)
放絞り径内を分割した複数のセグメントと、前記セグメ
ントを電圧印加時に遮光状態とし、電圧無印加時に透明
状態とするための電圧制御手段とを設けたことを特徴と
する絞り装置。(1) A thin plate that is shielded from light outside the open aperture diameter, a plurality of segments obtained by dividing the inside of the thin plate within the open aperture diameter, and a voltage that makes the segments light-shielded when a voltage is applied and transparent when no voltage is applied. A diaphragm device characterized in that it is provided with a control means.
する特許請求の範囲第1項記載の絞り装置。(2) The aperture device according to claim 1, wherein the segments are divided concentrically.
外側のセグメントが遮光状態になることを特徴とする特
許請求の範囲第1項又は第2項記載の絞り装置。(3) Depending on the most central segment in the shaded state,
3. The aperture device according to claim 1, wherein the outer segment is in a light-shielding state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10939089A JPH02287447A (en) | 1989-04-28 | 1989-04-28 | Diaphragm device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10939089A JPH02287447A (en) | 1989-04-28 | 1989-04-28 | Diaphragm device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02287447A true JPH02287447A (en) | 1990-11-27 |
Family
ID=14509025
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10939089A Pending JPH02287447A (en) | 1989-04-28 | 1989-04-28 | Diaphragm device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02287447A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004287437A (en) * | 2003-03-19 | 2004-10-14 | Boeing Co:The | Variable aperture diaphragm and method for manufacturing variable aperture diaphragm |
DE102020116171B4 (en) | 2019-07-22 | 2023-02-09 | Silicon Touch Technology Inc. | Mobile communication device, optical assembly and its aperture module |
-
1989
- 1989-04-28 JP JP10939089A patent/JPH02287447A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004287437A (en) * | 2003-03-19 | 2004-10-14 | Boeing Co:The | Variable aperture diaphragm and method for manufacturing variable aperture diaphragm |
DE102020116171B4 (en) | 2019-07-22 | 2023-02-09 | Silicon Touch Technology Inc. | Mobile communication device, optical assembly and its aperture module |
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