JPH03129942U - - Google Patents
Info
- Publication number
- JPH03129942U JPH03129942U JP3665690U JP3665690U JPH03129942U JP H03129942 U JPH03129942 U JP H03129942U JP 3665690 U JP3665690 U JP 3665690U JP 3665690 U JP3665690 U JP 3665690U JP H03129942 U JPH03129942 U JP H03129942U
- Authority
- JP
- Japan
- Prior art keywords
- focal length
- mirror
- finder
- optical path
- objective lens
- 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
- 230000003287 optical effect Effects 0.000 claims description 36
- 230000037431 insertion Effects 0.000 claims description 2
- 238000003780 insertion Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Viewfinders (AREA)
Description
第１図は、本考案に係る視野可変式の実像フア
インダを組込んだ焦点距離可変式カメラの概略構
成を示す斜視透視図、第２図は、第１図示の実像
フアインダの主要部分の詳細な構成を示す斜視図
、第３図は、第１図示の視野可変式の実像フアイ
ンダが長焦点距離用フアインダの状態にあるとき
の光路切換えミラーの姿勢を示す説明図である。
１……撮影光学系、Ｏ……撮影光軸、２……カ
メラの本体部、３……前面凸部、１０……実像フ
アインダ光学系、１１……長焦点距離用対物レン
ズ、１２……短焦点距離用対物レンズ、１３……
接眼レンズ、１４……リレーレンズ、１５……第
１ミラー、１６……第２ミラー、１７……第３ミ
ラー、１８……第４ミラー、１９……第５ミラー
（光路切換えミラー）、ＯＴ……長焦点距離用フ
アインダの光軸、ＯＷ……短焦点距離用フアイン
ダの光軸、Ｏ１……第１迂回光路の光軸（最先の
迂回光路）、Ｏ２……第２迂回光路の光軸、Ｏ３
……第３迂回光路の光軸、ＯＥ……フアインダ接
眼光軸、２１……主レンズ枠、２１ａ……連動突
起、２１ｂ……保持面、２２……可動ミラー枠、
２２ａ……挿入位置設定片、２２ｂ……被動ピン
、２３……支持軸、２４……第１の捻りばね、２
５……第１の係止ピン、２６……連動レバー、２
７……支持軸、２８……第２の捻りばね、２９…
…第２の係止ピン、３１……パララツクス調節ね
じ、３１ａ……先端部、３２……調整台。
FIG. 1 is a perspective perspective view showing a schematic configuration of a variable focal length camera incorporating a variable field of view real image finder according to the present invention, and FIG. 2 shows a detailed view of the main parts of the real image finder shown in FIG. FIG. 3, which is a perspective view showing the configuration, is an explanatory diagram showing the attitude of the optical path switching mirror when the variable field of view type real image finder shown in FIG. 1 is in the state of a long focal length finder. DESCRIPTION OF SYMBOLS 1...Photographing optical system, O...Photographing optical axis, 2...Camera body, 3...Front convex portion, 10...Real image finder optical system, 11...Long focal length objective lens, 12... Objective lens for short focal length, 13...
Eyepiece lens, 14... Relay lens, 15... First mirror, 16... Second mirror, 17... Third mirror, 18... Fourth mirror, 19... Fifth mirror (optical path switching mirror), OT ...Optical axis of the long focal length finder, OW...Optical axis of the short focal length finder, O 1 ... Optical axis of the first detour optical path (first detour optical path), O 2 ... Second detour optical path optical axis, O 3
... Optical axis of third detour optical path, OE ... Viewfinder eyepiece optical axis, 21 ... Main lens frame, 21a ... Interlocking projection, 21b ... Holding surface, 22 ... Movable mirror frame,
22a...Insertion position setting piece, 22b...Driven pin, 23...Support shaft, 24...First torsion spring, 2
5...First locking pin, 26...Interlocking lever, 2
7...Support shaft, 28...Second torsion spring, 29...
... second locking pin, 31 ... parallax adjustment screw, 31a ... tip, 32 ... adjustment table.
Claims (1)
ために変位する撮影光学系を備えた焦点距離可変
式カメラにおける視野可変式の実像フアインダに
おいて、 前記カメラの前面近傍であつて、前記撮影光学
系の光軸から上下・左右の方向に離れている部位
に設定された長焦点距離用フアインダ光軸上に設
けられた長焦点距離用対物レンズと、この焦点距
離用対物レンズに対して所定の間隔を隔てて平行
に設定された短焦点距離用フアインダ光軸上に設
けられた短焦点距離用対物レンズと、カメラ背面
近傍の部位に設けられた接眼レンズと、前記長焦
点距離用対物レンズおよび前記短焦点距離用対物
レンズからのフアインダ光束を前記接眼レンズに
導き得るように設けられたリレーレンズとから成
る視野可変式の実像フアインダ光学系と、 前記長焦点距離用対物レンズの後方部位であつ
て、前記長焦点距離用対物レンズからのフアイン
ダ光束をカメラ前面と平行する面内であつて且つ
撮影光学系の光路を迂回する方向に反射させるよ
うに設けられた第１ミラーと、 この第１ミラーで反射されたフアインダ光束を
撮影光学系の光軸と平行する方向へ反射させるよ
うに設けられた第２ミラーと、 この第２ミラーと前記第１ミラーとの間に形成
された最先の迂回光路と、 前記第２ミラーで反射されたフアインダ光束を
前記最先の迂回光路の光軸と直交する方向に反射
させるように設けられた第３ミラーと、 この第３ミラーで反射されたフアインダ光束を
接眼レンズに入射させるように設けられた第４ミ
ラーと、 前記短焦点距離用対物レンズの後方部位であつ
て、最先の迂回光路内に設定された挿入位置と最
先の迂回光路外に設定された退避位置との間を往
復的に変位し得るように設けられ、自身が前記挿
入位置に変位した際には、前記長焦点距離用対物
レンズからのフアインダ光束を遮断すると共に、
前記短焦点距離用対物レンズからのフアインダ光
束を第２ミラーに向つて反射し得るように設けら
れた光路切換えミラーと、 撮影光学系が短焦点距離を実現している状態か
ら長焦点距離を実現する状態に移行したときに、
その移行動作に連動して、前記光路切換えミラー
を前記挿入位置から退避位置に変位させ得るよう
に設けられた連動部材 とを有することを特徴とする視野可変式の実像フ
アインダ。 (2) 前記光路切換えミラーの反射角を調節し得
るように構成し、前記光路切換えミラーの設置時
の反射角を調節することによつて、長焦点距離時
のフアインダ視野と短焦点距離時のフアインダ視
野との間に生じるパララツクスを補正し得るよう
に構成した請求項１に記載の視野可変式の実像フ
アインダ。[Claims for Utility Model Registration] (1) In a real image viewfinder with a variable field of view in a variable focal length camera equipped with a photographing optical system that moves to realize at least two types of focal lengths: long and short, near the front of said camera. and a long focal length objective lens provided on the optical axis of a long focal length finder set at a location away from the optical axis of the photographing optical system in the vertical and horizontal directions; a short focal length objective lens provided on the optical axis of a short focal length finder set parallel to the objective lens at a predetermined interval; and an eyepiece lens provided near the back of the camera; a variable field of view real image finder optical system comprising a long focal length objective lens and a relay lens provided so as to guide the finder light flux from the short focal length objective lens to the eyepiece; A rear portion of the objective lens, which is provided to reflect the finder light beam from the long focal length objective lens in a plane parallel to the front surface of the camera and in a direction bypassing the optical path of the photographing optical system. a second mirror provided to reflect the finder light beam reflected by the first mirror in a direction parallel to the optical axis of the photographing optical system; and between the second mirror and the first mirror. the first detour optical path formed in the first detour optical path; a third mirror provided to reflect the finder light beam reflected by the second mirror in a direction perpendicular to the optical axis of the first detour optical path; a fourth mirror provided to allow the finder light beam reflected by the third mirror to enter the eyepiece; and an insertion position set in the first detour optical path at the rear of the short focal length objective lens. and a retracted position set outside the first detour optical path. In addition to blocking the luminous flux,
An optical path switching mirror provided to reflect the finder light beam from the short focal length objective lens toward a second mirror, and a photographing optical system that realizes a long focal length from a state that achieves a short focal length. When you move to a state where
A real image finder with a variable field of view, further comprising an interlocking member provided to displace the optical path switching mirror from the inserted position to the retracted position in conjunction with the shifting operation. (2) The reflection angle of the optical path switching mirror can be adjusted, and by adjusting the reflection angle when the optical path switching mirror is installed, the viewfinder field of view at a long focal length and the view field at a short focal length can be adjusted. 2. The variable field of view type real image finder according to claim 1, wherein the real image finder is configured to correct parallax occurring between the viewfinder and the field of view of the finder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3665690U JPH03129942U (en) | 1990-04-06 | 1990-04-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3665690U JPH03129942U (en) | 1990-04-06 | 1990-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03129942U true JPH03129942U (en) | 1991-12-26 |
Family
ID=31543076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3665690U Pending JPH03129942U (en) | 1990-04-06 | 1990-04-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03129942U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101944222B1 (en) * | 2018-10-17 | 2019-01-30 | 서희주 | removable jewelry that can be converted into necklaces or rings |
-
1990
- 1990-04-06 JP JP3665690U patent/JPH03129942U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101944222B1 (en) * | 2018-10-17 | 2019-01-30 | 서희주 | removable jewelry that can be converted into necklaces or rings |
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