JPH01200239A - Photographing system for single-lens reflex camera - Google Patents
Photographing system for single-lens reflex cameraInfo
- Publication number
- JPH01200239A JPH01200239A JP2473488A JP2473488A JPH01200239A JP H01200239 A JPH01200239 A JP H01200239A JP 2473488 A JP2473488 A JP 2473488A JP 2473488 A JP2473488 A JP 2473488A JP H01200239 A JPH01200239 A JP H01200239A
- Authority
- JP
- Japan
- Prior art keywords
- photographing
- lens
- optical axis
- reflecting mirror
- camera
- 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
- 230000011514 reflex Effects 0.000 title claims description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 35
- 230000004907 flux Effects 0.000 claims abstract description 4
- 238000003384 imaging method Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Viewfinders (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は写真カメラやビデオカメラ等に好適な一眼レフ
カメラ用の撮影系に関し、特に−眼レフカメラの高さ方
向の短縮化を図ると共に撮影レンズのカメラ本体内への
収納化を可能とし、カメラ全体の小型化を図った一眼レ
フカメラ用の撮影系に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a photographing system for a single-lens reflex camera suitable for a photo camera, a video camera, etc., and particularly to a photographing system for a single-lens reflex camera suitable for photo cameras, video cameras, etc. The present invention relates to a photographing system for a single-lens reflex camera that allows the photographic lens to be housed within the camera body, thereby reducing the overall size of the camera.
（従来の技術）
近年−眼レフカメラにおいてもレンズシャッターカメラ
程度の小型化が要望されている。(Prior Art) In recent years, there has been a demand for eye reflex cameras to be as compact as lens shutter cameras.
−眼レフカメラ、特に写真カメラでは撮影レンズを通過
した被写体からの光束な回動式の反射ミラーでカメラに
対して高さ方向に反射させた後、ピント板上にファイン
ダー像を形成し、該ファインダー像をペンタプリズムを
介して接眼レンズで観察する構成のファインダー光学系
が多く用いられている。- In an eye reflex camera, especially a photographic camera, the light beam from the subject that passes through the photographic lens is reflected in the height direction toward the camera by a rotating reflecting mirror, and then a finder image is formed on the focusing plate. A finder optical system in which a finder image is observed through an eyepiece through a pentaprism is often used.
この為、ペンタプリズムの大きさに相当する量だけカメ
ラ全体が高さ方向に大型化する傾向があった。For this reason, there has been a tendency for the entire camera to increase in size in the height direction by an amount corresponding to the size of the pentaprism.
又、撮影レンズはカメラ本体曲面に取り付けられる為に
撮影レンズの長さに相当する量だけカメラ全体が大型化
してくる。特にズームレンズや望遠レンズ等のレンズ全
長の長い撮影レンズを取り付けた場合にはカメラ全体が
より大型化してくる傾向かあった。Furthermore, since the photographic lens is attached to the curved surface of the camera body, the overall size of the camera increases by an amount corresponding to the length of the photographic lens. In particular, when a photographic lens with a long overall length, such as a zoom lens or a telephoto lens, is attached, the overall size of the camera tends to become larger.
（発明が解決しようとする問題点）
本発明は従来のペンタプリズムを用いずに複数の反射鏡
と複数の反射型プリズムを適切に配置してファインダー
光学系を構成し、カメラ全体の小型化、特に高さ方向の
縮少化を図った一眼レフカメラ用の撮影系の提供を目的
とする。(Problems to be Solved by the Invention) The present invention constructs a finder optical system by appropriately arranging a plurality of reflecting mirrors and a plurality of reflecting prisms without using a conventional pentaprism, thereby reducing the size of the entire camera. The object of the present invention is to provide a photographing system for a single-lens reflex camera that is particularly compact in the height direction.
又、本発明の更なる目的はカメラ本体前方に取り付ける
撮影レンズの一部がカメラ本体内に収納出来、非撮影時
におけるカメラ全体の小型化を容易とした一眼レフカメ
ラ用の撮影系の提供にある。A further object of the present invention is to provide a photographing system for a single-lens reflex camera in which a part of the photographic lens attached to the front of the camera body can be stored inside the camera body, making it easy to downsize the entire camera when not photographing. be.
（問題点を解決する為の手段）
撮影レンズを通過した被写体からの光束を第１反射鏡に
より撮影光軸に対して側方の第１光軸方向に反射させ、
次いで有効撮影光束外に配置した第１反射型プリズムを
介して該第１光軸に対して側方の第２光軸方向に反射さ
せた後ファインダー像を形成し、該ファインダー像に基
つく光束を第２反射型プリズムを介して該第２光軸に対
して側方の第３光軸方向に反射させ、次いで第２反射鏡
で該撮影光軸と略平行の第４光軸方向に反射させた後、
該ファインダー像を観察するように構成したことである
。(Means for solving the problem) The light flux from the subject that has passed through the photographing lens is reflected by a first reflecting mirror in the direction of the first optical axis, which is lateral to the photographing optical axis.
Next, a finder image is formed after being reflected in the direction of a second optical axis lateral to the first optical axis through a first reflective prism placed outside the effective shooting light beam, and the light beam based on the finder image is is reflected in the direction of a third optical axis lateral to the second optical axis through a second reflective prism, and then reflected in the direction of a fourth optical axis substantially parallel to the photographing optical axis by a second reflecting mirror. After letting
The structure is such that the finder image is observed.
（実施例）
第１図、第２図は本発明の第１実施例の要部の上面図と
側面図である。(Embodiment) FIGS. 1 and 2 are a top view and a side view of essential parts of a first embodiment of the present invention.
図中１はカメラ本体、１ａはグリップである。In the figure, 1 is a camera body, and 1a is a grip.
２は撮影レンズであり、カメラ本体１の薄力に取り付け
られている。そして撮影時には実線で示す位置に縁り出
され、非撮影時には点線で示すようにその一部若しくは
全部がカメラ本体１内に収納可能となるように構成され
ている。３は結像面であり、例えばフィルム面や撮像面
等である。４は第１反射鏡であり、矢印４ａの如く回転
可能に取り付けられている。第１反射鏡４は撮影レンズ
２を通過した被写体からの光束を撮影光軸２ａに対して
側方に、本実施例では直角方向の第１光軸２１方向に反
射させている。Reference numeral 2 denotes a photographing lens, which is attached to a thin section of the camera body 1. It is configured so that it is edged out at the position shown by the solid line when photographing, and part or all of it can be stored in the camera body 1 as shown by the dotted line when not photographing. 3 is an imaging plane, such as a film plane or an imaging plane. 4 is a first reflecting mirror, which is rotatably attached as shown by an arrow 4a. The first reflecting mirror 4 reflects the light beam from the subject that has passed through the photographing lens 2 laterally with respect to the photographing optical axis 2a, in the direction of the first optical axis 21, which is perpendicular to the photographing optical axis 2a in this embodiment.
５は第１反射型プリズムであり、有効撮影光束外に配置
されており第１反射鏡４からの光束を第１光軸２１と直
交する第２光軸２２方向くカメラ本体１の高さ方向）に
反射させている。６はピント板であり、ＪｒＡ影レンズ
２によるファインダー像が形成されている。７はコンデ
ンサーレンズであり、ピント板６上のファインダー像か
ら発散されてくる光束を集光している。８は第２反射型
プリズムであり、コンデンサーレンズ７からの光束を第
２光軸２２と直交する第３光軸２３方向に反射させてい
る。Reference numeral 5 denotes a first reflective prism, which is disposed outside the effective photographing light beam and directs the light beam from the first reflecting mirror 4 in the direction of a second optical axis 22 perpendicular to the first optical axis 21 and in the height direction of the camera body 1. ) is reflected. 6 is a focusing plate, on which a finder image is formed by the JrA shadow lens 2. A condenser lens 7 condenses the light beam diverging from the finder image on the focusing plate 6. A second reflective prism 8 reflects the light beam from the condenser lens 7 in the direction of a third optical axis 23 orthogonal to the second optical axis 22 .
９は第２反射鏡であり、第２反射型プリズム８からの光
束を第３光軸２３と直交し、しかも撮影光軸２ａと略平
行方向の第４光軸２４方向に反射させている。１０は接
眼レンズであり５第２反射鏡９からの光束を受けてピン
ト板６上のファインダー像を観察している。A second reflecting mirror 9 reflects the light beam from the second reflective prism 8 in the direction of a fourth optical axis 24, which is perpendicular to the third optical axis 23 and substantially parallel to the photographing optical axis 2a. Reference numeral 10 denotes an eyepiece lens which receives the light beam from the second reflecting mirror 5 and observes the finder image on the focusing plate 6.
１１は反射型プリズムであり、第１反射型プリズム５の
反射面５ａの一部に設けられており、反射面５ａの一部
を通過した光束を受光素子１２に導光し、例えばリジッ
ド式の測光若しくは測距等を行っている。A reflective prism 11 is provided on a part of the reflective surface 5a of the first reflective prism 5, and guides the light beam that has passed through a part of the reflective surface 5a to the light receiving element 12, for example, a rigid type prism. Performs photometry or distance measurement.
１３はシャッター手段であり、結像面３の前方に配置し
たシャッター幕１３ａの駆動制御を行っている。１４は
フィルムパトローネ、１５はフィルムスプール、１６は
リチウム電池、１７はストロボ蓄電器、１８はストロボ
発光部である。Reference numeral 13 denotes a shutter means, which controls the drive of a shutter curtain 13a arranged in front of the imaging plane 3. 14 is a film cartridge, 15 is a film spool, 16 is a lithium battery, 17 is a strobe capacitor, and 18 is a strobe light emitting unit.
本実施例では撮影時には撮影レンズ２及び第１反射鏡４
を各々実線で示す位置に配置している。In this embodiment, the photographing lens 2 and the first reflecting mirror 4 are used when photographing.
are placed at the positions indicated by solid lines.
そして撮影レンズ２を通過した被写体からの光束を第１
反射ｍ４、第１反射型プリズム５を介してピント板６上
にファインダー像を形成している。Then, the light flux from the subject that has passed through the photographing lens 2 is
A finder image is formed on the focusing plate 6 via the reflection m4 and the first reflective prism 5.
次いでピント板６上のファインダー像を第２反射型プリ
ズム８、第２反射鏡９を介して接眼レンズ１０で被写体
の正立像をアイレヘルで観察している。Next, the finder image on the focusing plate 6 is passed through the second reflecting prism 8 and the second reflecting mirror 9, and an erect image of the subject is observed with the eyepiece lens 10.
又、非撮影時には第１反射鏡４を点線で示す位置に回動
停止させ、撮影レンズ２は点線で示すようにカメラ本体
！内に収納されるように構成している。Also, when not photographing, the first reflecting mirror 4 is rotated and stopped at the position shown by the dotted line, and the photographing lens 2 is moved to the camera body as shown by the dotted line! It is configured to be stored inside.
本実施例ではファインダー光学系を従来のペンタプリズ
ムを用いずに２つの反射鏡と２つの反射型プリズムを１
１１述の如く用いて構成することにより、カメラ本体の
高さ方向の短縮化を図っている。In this example, the finder optical system uses two reflecting mirrors and two reflective prisms instead of the conventional pentaprism.
By using and configuring as described in 11, it is possible to shorten the height of the camera body.
又、撮影レンズの一部若しくは全部を非撮影時にカメラ
本体内に収納出来るようにし、非撮影時におけるカメラ
の全長を短くしている。In addition, part or all of the photographic lens can be housed within the camera body when not photographing, thereby shortening the overall length of the camera when not photographing.
このように本実施例ではストロボ組込みか可能で、しか
もレンズシャッターカメラ程度の小型化を図フだ一眼レ
フカメラの達成を可能としている。In this way, this embodiment allows for the incorporation of a strobe light, and also makes it possible to achieve a single-lens reflex camera that is as compact as a lens-shutter camera.
尚、本実施例において反射型プリズムの代わりに単なる
反射鏡を用いても良く、逆に反射鏡の代りに反射型プリ
ズムを用いても良い。又、第１゜第２．第３．第４光軸
は必ずしも互いに直交している必要はなく、単に光軸を
側方に反射させる角度で設定しても良い。In this embodiment, a simple reflecting mirror may be used instead of the reflecting prism, or conversely, a reflecting prism may be used instead of the reflecting mirror. Also, 1st ° 2nd. Third. The fourth optical axes do not necessarily have to be orthogonal to each other, and may be set at an angle that simply reflects the optical axes laterally.
第３図は本発明の第２の実施例の要部の上面図である。FIG. 3 is a top view of essential parts of a second embodiment of the present invention.
第１図に示す実施例ではファインダー像の形成されるピ
ント板６がカメラ本体１のグリップｌａ側に位置するよ
うに各要素を構成した場合を示したが、本実施例では反
対側のストロボ発光部１８側に位置するように各要素を
構成したものであり、第１図の実施例とはカメラ本体１
の外形状が多少異なるだけであり、木質的には第１図の
実施例と同様である。In the embodiment shown in FIG. 1, each element is configured such that the focus plate 6 on which the finder image is formed is located on the grip la side of the camera body 1, but in this embodiment, the strobe light is emitted on the opposite side. Each element is configured so as to be located on the camera body 18 side, and the embodiment shown in FIG.
The only difference is the external shape, and the wood quality is similar to the embodiment shown in FIG.
（発明の効果）
本発明によれば２枚の反射鏡と２つの反射型プリズムを
前述の如く配置してファインダー光学系を構成すること
により、カメラの高さ方向を短縮し、更に長さ方向の短
縮化を可能としたカメラ全体の小型化が容易に図れる一
眼レフカメラ用の撮影系を達成することができる。(Effects of the Invention) According to the present invention, by configuring the finder optical system by arranging two reflective mirrors and two reflective prisms as described above, the height of the camera can be shortened, and the camera can be shortened in the length direction. It is possible to achieve a photographing system for a single-lens reflex camera that can easily reduce the size of the entire camera and shorten the time.
第１図、第２図は本発明の第１実施例の要部の上面図と
側面図である。第３図は本発明の第２実施例の要部の上
面図である。
図中、１はカメラ本体、１ａはグリップ、２は撮影レン
ズ、３は結像面、４は第１反射鏡、５は第１反射型プリ
ズム、６はピント板、７はコンデンサーレンズ、８は第
２反射型プリズム、９は第２反射鏡、１０は接眼レンズ
、１３はシャッター手段、１４はフィルムパトローネ、
１５はフィルムスブール、１６はリチウム電池、１７は
ストロボ蓄電器、１８はストロボ発光部である。
特許出願人 キャノン株式会社
ニー” ’−，’１1 and 2 are a top view and a side view of essential parts of a first embodiment of the present invention. FIG. 3 is a top view of essential parts of a second embodiment of the present invention. In the figure, 1 is the camera body, 1a is the grip, 2 is the photographing lens, 3 is the imaging plane, 4 is the first reflecting mirror, 5 is the first reflective prism, 6 is the focusing plate, 7 is the condenser lens, and 8 is the condenser lens. a second reflecting prism; 9 a second reflecting mirror; 10 an eyepiece; 13 a shutter means; 14 a film cartridge;
Reference numeral 15 designates a filmstable, 16 a lithium battery, 17 a strobe capacitor, and 18 a strobe light emitting unit. Patent applicant: Canon Co., Ltd.
Claims (1)
射鏡により撮影光軸に対して側方の第１光軸方向に反射
させ、次いで有効撮影光束外に配置した第１反射型プリ
ズムを介して該第１光軸に対して側方の第２光軸方向に
反射させた後ファインダー像を形成し、該ファインダー
像に基づく光束を第２反射型プリズムを介して該第２光
軸に対して側方の第３光軸方向に反射させ、次いで第２
反射鏡で該撮影光軸と略平行の第４光軸方向に反射させ
た後、該ファインダー像を観察するように構成したこと
を特徴とする一眼レフカメラ用の撮影系。(1) The light beam from the subject that has passed through the photographing lens is reflected by the first reflecting mirror in the direction of the first optical axis, which is lateral to the photographing optical axis, and then the first reflective prism is placed outside the effective photographing light beam. A finder image is formed after being reflected in the direction of a second optical axis lateral to the first optical axis, and a luminous flux based on the finder image is directed to the second optical axis via a second reflective prism. The light is reflected laterally in the direction of the third optical axis, and then the second optical axis is reflected.
A photographing system for a single-lens reflex camera, characterized in that the finder image is observed after being reflected by a reflecting mirror in a fourth optical axis direction substantially parallel to the photographing optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2473488A JPH01200239A (en) | 1988-02-04 | 1988-02-04 | Photographing system for single-lens reflex camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2473488A JPH01200239A (en) | 1988-02-04 | 1988-02-04 | Photographing system for single-lens reflex camera |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01200239A true JPH01200239A (en) | 1989-08-11 |
Family
ID=12146376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2473488A Pending JPH01200239A (en) | 1988-02-04 | 1988-02-04 | Photographing system for single-lens reflex camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01200239A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6580485B1 (en) | 1996-04-30 | 2003-06-17 | Nec Corporation | Liquid crystal display apparatus having improved gray scale display characteristics |
| FR2867024A1 (en) | 2004-01-30 | 2005-09-09 | Sumitomo Chemical Co | SUPPORT MEMBER AND EVAPORATION APPARATUS USING THE SAME |
-
1988
- 1988-02-04 JP JP2473488A patent/JPH01200239A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6580485B1 (en) | 1996-04-30 | 2003-06-17 | Nec Corporation | Liquid crystal display apparatus having improved gray scale display characteristics |
| FR2867024A1 (en) | 2004-01-30 | 2005-09-09 | Sumitomo Chemical Co | SUPPORT MEMBER AND EVAPORATION APPARATUS USING THE SAME |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS58214121A (en) | Device for photographic microscope | |
| JPS61114217A (en) | Photographic optical system | |
| JPH04343Y2 (en) | ||
| JPH01200239A (en) | Photographing system for single-lens reflex camera | |
| JP2556553B2 (en) | Compact single-lens reflex camera | |
| JPS5850340B2 (en) | Ichiganrefuyofu Inder | |
| JP2556554B2 (en) | Compact single-lens reflex camera | |
| JPH01200240A (en) | Photographing system for single-lens reflex camera provided with finder visual field switching means | |
| JP2528125Y2 (en) | Viewfinder device for lens shutter type camera | |
| JPH04342Y2 (en) | ||
| JP3294567B2 (en) | Camera finder device | |
| JPS60114841A (en) | Camera | |
| JP2536061B2 (en) | Optical system having optical path bending means | |
| JP2656046B2 (en) | Metering system for electronic cameras | |
| JPH0254225A (en) | Optical system provided with optical path bending means | |
| JPH09211310A (en) | Camera | |
| JPH02178644A (en) | Single-lens reflex camera | |
| JPS60233628A (en) | Finder optical system | |
| JPH0272339A (en) | Compact single lens reflex camera | |
| JPS636532A (en) | Automatic focusing camera capable of proximity photographing | |
| JPH0629925B2 (en) | Fiber optics | |
| JPH0310231A (en) | Finder optical system variable in observation direction | |
| JPS6115105A (en) | Finder optical system | |
| JPH0285836A (en) | Single-lens reflex camera | |
| JPH0310232A (en) | Finder optical system variable in observation direction |