JPS595222A - Optical finder - Google Patents

Optical finder

Info

Publication number
JPS595222A
JPS595222A JP11504682A JP11504682A JPS595222A JP S595222 A JPS595222 A JP S595222A JP 11504682 A JP11504682 A JP 11504682A JP 11504682 A JP11504682 A JP 11504682A JP S595222 A JPS595222 A JP S595222A
Authority
JP
Japan
Prior art keywords
angle
view
zoom lens
movement
display
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
Application number
JP11504682A
Other languages
Japanese (ja)
Inventor
Junichi Fujino
順一 藤野
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP11504682A priority Critical patent/JPS595222A/en
Publication of JPS595222A publication Critical patent/JPS595222A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1313—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells specially adapted for a particular application
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/02—Viewfinders
    • G03B13/04—Viewfinders of direct vision type, e.g. frame, sighting mark

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • Viewfinders (AREA)
  • Telescopes (AREA)

Abstract

PURPOSE:To enable the distinct display of an angle of view while assuring a wide visual field by controlling a field angle detector according to the movement of a zoom lens and displaying the angle of view changing according to the movement of the zoom lens on an angle of view display plate. CONSTITUTION:When an angle of view selector switch 3 is selected by an angle of view detector 4 according to the movement of a zoom lens 5, an angle of view displays plate 1 displays the angle of view changing according to the movement of a zoom lens 5 by the voltage supplied from an electric power source 2. More specifically, when a voltage is applied between, for example, transparent electrodes 11b and 12 selected by the switch 3, a display element 13 such as a liquid crystal or electrochormic is made opaque or is colored to the shape of the electrode 11b, by which the angle of view is displayed.

Description

【発明の詳細な説明】 本発明は光学式ファインダに係り、脣に光学式カメラ及
びビデオカメラ等において、撮影する被写体の画角決定
及びピント合わせの確認等を行なうために設けられるＴ
ＴＬ方式で無い光学式ファインダに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical viewfinder, and more particularly, to an optical viewfinder provided in an optical camera, video camera, etc., for determining the angle of view of a subject to be photographed and confirming focus adjustment.
This relates to an optical finder that is not a TL method.

従来ＴＴＬ方式で無い光学式ファインダは、主として同
定焦点レンズを用いたカメラか用いられ、ファインダは
ほぼ画角と一致させてあり、ファインダ内に画角の表示
の無い場合、又は第１図（ａｌに示すごとくファインダ
内に固定の画角が表示される場合がほとんどであった。Conventional optical viewfinders that are not TTL type are mainly used with cameras that use a fixed focus lens, and the viewfinder is aligned almost with the angle of view. In most cases, a fixed angle of view was displayed in the viewfinder, as shown in the figure below.

そして、一部にクローズアップレンズ等を押入してレン
ズの焦点距離、すなわち画角を２段階に変えることが可
能なカメラにおいては、第１図（１））に示すごきくフ
ァインダ内に２種類の固定した画角の表示がなされる場
合もあった。In cameras where the focal length of the lens, that is, the angle of view, can be changed in two stages by inserting a close-up lens, etc., there are two types of lenses in the viewfinder as shown in Figure 1 (1)). In some cases, a fixed angle of view was displayed.

従来の光学式ファインダは以上のように構成されている
ので、レンズとしてズームレンズを用いた場合のように
、画角が連続して変化する時に、ファインダ内に画角を
表示することは非常に困難となる欠点があった。一方、
ＴＴＬ方式のファインダにおいては、画角は常にファイ
ンダと一致させることかできるか、ズームレンズの焦点
距離においては、レンズの倍率により画角か変化するの
でその視野か変化することになり、特にレンズの倍率を
高くした場合に視野か小さくなり、構図の決定には著し
く不便を生ずるという欠点かあった。Conventional optical viewfinders are constructed as described above, so when the angle of view changes continuously, as when using a zoom lens, it is very difficult to display the angle of view in the viewfinder. There were drawbacks that made it difficult. on the other hand,
With a TTL type finder, is it possible to always match the angle of view with the finder? With the focal length of a zoom lens, the angle of view changes depending on the magnification of the lens, so the field of view changes, especially when the lens The disadvantage was that when the magnification was increased, the field of view became smaller, making it extremely inconvenient to decide on the composition.

本発明は上記のような従来のものの欠点を除去するため
になされたもので、ＴＴＬ方式で無い光学式ファインダ
において、ズームレンズの移動に応じて画角検出器を制
御し、この画角検出器により前記ズームレンズの移動に
応じて変化する画角を、画角表示板に表示するようにし
てなる構成を有し、広い視野を確保し、かつ、ズームレ
ンズの焦点距離に応じて変化する画角の表示を行なう光
学式ファインダを提供することを目的としている。The present invention has been made in order to eliminate the drawbacks of the conventional ones as described above, and in an optical finder that is not a TTL method, the field angle detector is controlled according to the movement of the zoom lens, and the field angle detector is controlled according to the movement of the zoom lens. The angle of view that changes according to the movement of the zoom lens is displayed on the angle of view display board. The object of the present invention is to provide an optical finder that displays angles.

以下、本発明の一実施例を図について説明する。Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

第２図は本発明の一実施例である光学式ファインダを示
す概略構成図である。第２図に示されるように、１は画
角表示板、２は′電源、３は画角選択スイッチ、４は画
角検出器、５はズームレンズである。以上のように構成
された光学式ファインダにおいて、ズームレンズ５の移
動に応じて、画角検出器４により画角選択スイッチ３か
選択されると、電源２により供給される電圧によって、
画角表示板１にはズームレンズ５の移動に応じて変化す
る画角を表示する。ここで、画角検出器４は、ズームレ
ンズ５の繰り出し量を電気的又は機械的に検出する一般
的な手段により容易に実現できる。FIG. 2 is a schematic configuration diagram showing an optical finder which is an embodiment of the present invention. As shown in FIG. 2, 1 is a view angle display plate, 2 is a power source, 3 is a view angle selection switch, 4 is a view angle detector, and 5 is a zoom lens. In the optical viewfinder configured as described above, when the angle of view selection switch 3 is selected by the angle of view detector 4 in accordance with the movement of the zoom lens 5, the voltage supplied from the power source 2 causes the
An angle of view display board 1 displays an angle of view that changes as the zoom lens 5 moves. Here, the angle of view detector 4 can be easily realized by a general means of detecting the amount of extension of the zoom lens 5 electrically or mechanically.

第３図（ａ）及び（ｂ）は第２図における画角表示板１
を示す平面図及び側面図、第４図は第３図（ａ）におけ
る画角表示板１上の表示態様を示す図である。Figures 3 (a) and (b) show the angle of view display board 1 in Figure 2.
FIG. 4 is a diagram showing a display mode on the viewing angle display board 1 in FIG. 3(a).

第３図（ａ）及び（ｂ）において、１は画角表示板、Ｉ
ｌａ。In FIGS. 3(a) and (b), 1 is an angle of view display board, I
la.

１１ｂ　、ｌｌｃ及び１２はネサ等の透明電極、１３は
電圧により透明−不透明又は着色に変化する特性を有す
る液晶又はエレクトロクロミック素子等の表示素子、１
４はガラス基板である。上記画角表示板１は、第２図に
示される画角選択スイッチ３により選択された透明電極
、例えば各透明′ｗＬ極１１ｂと１２との間に１圧か印
加されると、透明′電極１１ｂの形状に、表示素子１３
か不透明又は着色にて画角の表示を行なう。この画角の
画角表示板１上における表示態様は、第４図に明示され
ている。上記画角表示板１では、透明電極１１ａ　、　
ｌｌｂ　、　ＩＩＣの３個を用いて表示画角数を３個と
したか、実際には、任意に必要個数に増減して用いるこ
とかできる。11b, llc, and 12 are transparent electrodes such as Nesa; 13 is a display element such as a liquid crystal or electrochromic element that has the property of changing from transparent to opaque or colored depending on voltage; 1
4 is a glass substrate. When one pressure is applied between the transparent electrodes selected by the view angle selection switch 3 shown in FIG. 11b, the display element 13
The angle of view is indicated by being opaque or colored. The manner in which this viewing angle is displayed on the viewing angle display board 1 is clearly shown in FIG. In the view angle display plate 1, the transparent electrode 11a,
The number of display angles of view is set to three by using three ILB and IIC, or in fact, the number can be increased or decreased as desired.

なお、上記実施例では従来の光学式ファインダに画角表
示板１を付加する構成の場合について説明したが、カメ
ラの構成によっては光学式ファインダの部分に反射ミラ
ー゛、保護ガラス等が設けられている場合があり、この
ような場合には、反射ミラー、保穫ガラス等に画角表示
板１の機能を持たせて、光学式ファインダを構成するこ
とも可能であることは云うまでもない。In addition, in the above embodiment, a case was explained in which the angle of view display plate 1 was added to a conventional optical finder, but depending on the configuration of the camera, a reflective mirror, a protective glass, etc. may be provided in the optical finder. In such cases, it goes without saying that it is also possible to construct an optical finder by providing the function of the angle-of-view display plate 1 to a reflecting mirror, a protective glass, or the like.

以上のように、本発明に係る光学式ファインダによれは
、ＴＴＬ方式で無い光学式ファインダにおいて、ズーム
レンズの５ｌＩｌに連動して変化する画角を、画角表示
板上に表示するようにしてなる構成としたので、広い視
野を確保しながら、ズームレンズの移動に応じた画角表
示をファインダ内に明確に表示することか可能であるか
ら、特にスチールカメラはもちろんのこと、ビデオカメ
ラなどのファインダとして用いた場合に、その実用的な
価値を極めて大となし得る優ねた効果を奏するものであ
る。As described above, in the optical finder according to the present invention, the angle of view that changes in conjunction with 5lIl of the zoom lens is displayed on the angle of view display board in an optical finder that is not a TTL type. With this configuration, it is possible to clearly display the angle of view in the viewfinder according to the movement of the zoom lens while ensuring a wide field of view, making it especially suitable for still cameras as well as video cameras. When used as a finder, it produces excellent effects that make its practical value extremely large.

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

第１１’ｌ　ｔａ＋及び（ｂ）は従来の光学式ファイン
ダ内における、そわぞれ、Ｕ＠定画角表示及び２段階の
画角表示を示す図、第２図は本発明の一実施例である光
学式ファインダを示す概略構成図、第３図（ａｌ及び（
ｂ）は第２図における画角表示板を示す平面図及び側面
図、第４図は第３図（ａ）における画角表示板上の表示
態様を示す国である。 １・・・・・・・・・画角表示板、２・・・・・・・・
・電源、３・・・・・・・・・画角選択スイッチ、４・
・・・・・・・・画角検出器、５・・・・・曲ズームレ
ンズ、ｌｌａ　、　ｌｌｂ　、　ｌｌｃ及び１２・・・
曲・・透明電極、１３・−・・・・・・・表示素子、１
４・・・・・・・・・ガラス基板。 なお、図中、同一符号は同一、又は相当部分を示す〇No. 11'l ta+ and (b) are diagrams showing U@ constant angle of view display and two-stage angle of view display, respectively, in a conventional optical finder, and Fig. 2 is an example of the present invention. A schematic configuration diagram showing a certain optical finder, Figure 3 (al and (
b) is a plan view and a side view showing the angle of view display board in FIG. 2, and FIG. 4 is a diagram showing the display mode on the angle of view display board in FIG. 3(a). 1...Angle of view display board, 2...
・Power supply, 3...Angle of view selection switch, 4.
...Angle of view detector, 5...Curved zoom lens, lla, llb, llc and 12...
Song...Transparent electrode, 13...Display element, 1
4...Glass substrate. In addition, in the figures, the same symbols indicate the same or equivalent parts〇

Claims (1)

【特許請求の範囲】[Claims] ＴＴＬ方式で無い光学式ファインダにおいて、ズームレ
ンズの移動に応じて画角検出器を制御し、該画角検出器
により前記ズームレンズの移動に応じて変化する画角を
、画角表示板に表示するようにしてなる構成としたこと
を特徴とする光学式ファインダ。In an optical viewfinder that is not a TTL method, an angle of view detector is controlled according to the movement of the zoom lens, and the angle of view that changes according to the movement of the zoom lens is displayed by the angle of view detector on an angle of view display board. An optical viewfinder characterized by having a configuration in which the viewfinder is configured so as to
JP11504682A 1982-06-30 1982-06-30 Optical finder Pending JPS595222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11504682A JPS595222A (en) 1982-06-30 1982-06-30 Optical finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11504682A JPS595222A (en) 1982-06-30 1982-06-30 Optical finder

Publications (1)

Publication Number Publication Date
JPS595222A true JPS595222A (en) 1984-01-12

Family

ID=14652841

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11504682A Pending JPS595222A (en) 1982-06-30 1982-06-30 Optical finder

Country Status (1)

Country Link
JP (1) JPS595222A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61129630A (en) * 1984-11-28 1986-06-17 Canon Inc Variable magnification finder
JPS6234530A (en) * 1985-08-09 1987-02-14 キヤノン株式会社 Eyeground camera
JPS62272236A (en) * 1986-05-20 1987-11-26 Victor Co Of Japan Ltd Picture frame display system for optical finder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61129630A (en) * 1984-11-28 1986-06-17 Canon Inc Variable magnification finder
JPS6234530A (en) * 1985-08-09 1987-02-14 キヤノン株式会社 Eyeground camera
JPH0360261B2 (en) * 1985-08-09 1991-09-13 Canon Kk
JPS62272236A (en) * 1986-05-20 1987-11-26 Victor Co Of Japan Ltd Picture frame display system for optical finder

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