JP3213632B2 - Relay type finder optical system - Google Patents
Relay type finder optical systemInfo
- Publication number
- JP3213632B2 JP3213632B2 JP15819192A JP15819192A JP3213632B2 JP 3213632 B2 JP3213632 B2 JP 3213632B2 JP 15819192 A JP15819192 A JP 15819192A JP 15819192 A JP15819192 A JP 15819192A JP 3213632 B2 JP3213632 B2 JP 3213632B2
- Authority
- JP
- Japan
- Prior art keywords
- optical system
- reflecting surface
- lens system
- plane
- image
- 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、カメラ特に銀塩写真用
カメラのファインダー光学系に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finder optical system for a camera, especially for a silver halide photographic camera.
【０００２】[0002]
【従来の技術】従来、カメラに用いられているＴＴＬ方
式のファインダー光学系の一例として、電子カメラに用
いられている特開平１−１３４４４０号公報や特開平２
−１００００８号公報に記載されたものがある。特開平
１−１３４４４０号公報に記載されたファインダー光学
系では、撮影レンズ系を通過した被写体の光束が、撮影
光路に対して進退可能な第一反射面で撮影光路に直角に
反射されて、撮影レンズ系に対して撮影画面と同一の距
離にある第一結像面で結像されるようになっている。し
かも、第一反射面と第一結像面の間に第二及び第三反射
面を設けることで光路を折り曲げて光路長が長くなるよ
うにし、第三反射面で曲げられた光束が撮影レンズ系の
光軸と直交し且つ離れる方向に進むようになっている。
そして、この光束は第一結像面で結像された後、第四反
射面で撮影レンズ系の光軸と略平行な方向に反射されて
接眼レンズ系を通過するが、第四反射面以降、第二結像
レンズ系及び接眼レンズ系は一直線上に並べられた構成
になっている。このファインダー光学系を備えたカメラ
では、撮影レンズ系の最後面から撮影画面までの距離が
長いために、第一反射面と第一結像面の間でファインダ
ー光学系の光路を曲げないと撮影レンズ系の光軸から第
一結像面までの距離が長くなって、ファインダー光学系
の高さ即ち撮影画面の短辺方向（通常、撮影画面の短辺
方向に撮影光学系とファインダー光学系が並べられてい
る）の高さが大きくなり、カメラ本体の大型化を招くこ
とになるわけである。2. Description of the Related Art Conventionally, as an example of a TTL finder optical system used in a camera, Japanese Patent Application Laid-Open No. 1-134440 and Japanese Patent Application Laid-Open No.
There is one described in JP-A-100008. In the finder optical system described in Japanese Patent Application Laid-Open No. 1-134440, a luminous flux of a subject that has passed through a photographic lens system is reflected at right angles to the photographic optical path by a first reflecting surface that can advance and retreat with respect to the photographic optical path. An image is formed on a first image forming plane at the same distance as the photographing screen with respect to the lens system. Moreover, by providing the second and third reflecting surfaces between the first reflecting surface and the first image forming surface, the optical path is bent so that the optical path length becomes longer, and the light beam bent by the third reflecting surface is used as a photographing lens. It travels in a direction perpendicular to and away from the optical axis of the system.
Then, after this light beam is imaged on the first image forming surface, it is reflected on the fourth reflecting surface in a direction substantially parallel to the optical axis of the taking lens system and passes through the eyepiece lens system. The second imaging lens system and the eyepiece lens system are arranged in a straight line. In a camera equipped with this viewfinder optical system, since the distance from the last surface of the taking lens system to the shooting screen is long, shooting must be performed without bending the optical path of the viewfinder optical system between the first reflecting surface and the first imaging surface. The distance from the optical axis of the lens system to the first image plane increases, and the height of the finder optical system, that is, the short side direction of the shooting screen (usually, the shooting optical system and the finder optical system (Which are arranged side by side) increases, which leads to an increase in the size of the camera body.
【０００３】又、特開平２−１００００８号公報に記載
されたファインダー光学系では、同様に第一反射面で反
射された被写体の光束は第一結像面で結像された後、第
二及び第三反射面で折り曲げられて光束が撮影レンズ系
の光軸と垂直な方向に遠ざかる向きに進み、その後三枚
の反射面で折り曲げられることで、第二反射面から出る
光束とほぼ同一の高さ位置まで撮影レンズ系の光軸に近
づけられ、しかも撮影レンズ系の光軸とほぼ平行な光束
となって接眼レンズ系を通過することになる。In the finder optical system described in Japanese Patent Application Laid-Open No. 2-100008, similarly, the luminous flux of the subject reflected by the first reflecting surface is formed on the first image forming surface, and then the second and second light beams are formed. The light beam is bent at the third reflecting surface and moves in a direction away from the optical axis of the taking lens system in a direction perpendicular to the optical axis of the photographing lens system. As a result, the light flux is brought close to the optical axis of the photographing lens system to the position, and passes through the eyepiece system as a light flux substantially parallel to the optical axis of the photographing lens system.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上述の従来
技術のうち前者の構成では、第二及び第三反射面で光路
を折り曲げるようにしても、第三反射面で撮影レンズ系
の光軸から遠ざかる方向に光束が曲げられるために、フ
ァインダー光学系の高さが大きくなる。そのため、カメ
ラ本体の小型化を図る点では不十分な構成であることに
変わりはない。しかも、第四反射面以降の光学系では、
撮影レンズ系の光軸と略平行に、第二結像レンズ系及び
接眼レンズ系を直線上に配列してあるために、第四反射
面から接眼レンズ系までの距離が長くなる。そのため、
この光学系をそのまま銀塩写真用カメラに採用すると、
撮影光学系に色分解プリズムが配設されない分だけ撮影
光学系の後方の光路長が短くなり、ファインダー光学系
だけがカメラ本体の後方から突出することになる。その
ため、この点からも、このファインダー光学系の構成で
はカメラの小型化は達成され得ないことになる。又、後
者の構成においても、第三反射面で反射される光束が撮
影レンズ系の光軸から遠ざかる向きに曲げられるため、
ファインダー光学系の高さが大きくなり、カメラ本体が
大型化するという前者と同様の欠点がある。By the way, in the former configuration among the above-mentioned prior arts, even if the optical path is bent at the second and third reflecting surfaces, the third reflecting surface is located away from the optical axis of the taking lens system. Since the light beam is bent in a direction away from the viewer, the height of the finder optical system is increased. Therefore, the configuration is still insufficient in reducing the size of the camera body. Moreover, in the optical system after the fourth reflecting surface,
Since the second imaging lens system and the eyepiece lens system are arranged in a straight line substantially parallel to the optical axis of the taking lens system, the distance from the fourth reflecting surface to the eyepiece lens system becomes longer. for that reason,
If this optical system is used as is in a silver halide photographic camera,
The optical path length behind the photographing optical system is shortened by the absence of the color separation prism in the photographing optical system, and only the finder optical system protrudes from the rear of the camera body. For this reason, from this point of view, the size of the camera cannot be achieved with the configuration of the finder optical system. Also, in the latter configuration, since the light beam reflected by the third reflecting surface is bent away from the optical axis of the taking lens system,
There is the same drawback as the former in that the height of the finder optical system is increased and the camera body is enlarged.
【０００５】本発明は、このような課題に鑑みて、ファ
インダー光学系の高さを小さくできて、カメラ本体を小
型化できるようにしたリレー式ファインダー光学系を提
供することを目的とする。SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a relay type finder optical system capable of reducing the height of a finder optical system and reducing the size of a camera body.
【０００６】[0006]
【課題を解決するための手段及び作用】本発明によるリ
レー式ファインダー光学系について、図１及び図２に基
づいて説明する。図１はファインダー光学系の配設位置
を示すカメラの光学系の部分的な斜視図、図２は第一結
像面及びその後方のファインダー光学系の構成例であ
る。図１において、撮影レンズ系１の後方には、撮影レ
ンズ系１を通過する被写体像の光束を撮影画面３に導く
ための光路に対して進退可能な第一反射面２が配設され
ている。第一反射面２の後方に位置する撮影画面３は横
長の矩形に形成されている。第一反射面２の反射光路は
撮影レンズ系１の光軸と直交する方向にあり、その光路
上には、被写体像の第一結像面４と第一結像面４を通過
した光束を反射させる第二反射面５とが順次配設されて
いる。そして、第二反射面５で折り曲げられる光束の光
路上には、図２に示すような２枚又はそれ以上の反射面
から成る反射光学系６と、反射光学系６内又はその前後
に位置する第二結像レンズ系７と、反射光学系６の後方
に位置する観察光学系８が順次配設されている。A relay type finder optical system according to the present invention will be described with reference to FIGS. FIG. 1 is a partial perspective view of an optical system of a camera showing a position where a finder optical system is provided, and FIG. 2 is a configuration example of a first image forming plane and a finder optical system behind the first image forming surface. In FIG. 1, a first reflecting surface 2 that is capable of moving forward and backward with respect to an optical path for guiding a light flux of a subject image passing through the photographing lens system 1 to a photographing screen 3 is disposed behind the photographing lens system 1. . The photographing screen 3 located behind the first reflecting surface 2 is formed in a horizontally long rectangle. The reflected light path of the first reflecting surface 2 is in a direction orthogonal to the optical axis of the photographing lens system 1, and the first image forming surface 4 of the subject image and the light flux passing through the first image forming surface 4 are provided on the optical path. A second reflecting surface 5 for reflecting light is arranged in order. Then, on the optical path of the light beam bent by the second reflecting surface 5, a reflecting optical system 6 composed of two or more reflecting surfaces as shown in FIG. A second imaging lens system 7 and an observation optical system 8 located behind the reflection optical system 6 are sequentially arranged.
【０００７】しかも、第二反射面５から観察光学系８の
射出面に至るまでの光束の光軸が、第二反射面５の有効
反射領域の下端を含み且つ撮影レンズ系１の光軸に平行
な第一平面Ｂと、第二反射面５の有効反射領域の上端を
含み且つ第一平面Ｂに平行な第二平面Ｃとの間に収めら
れるように、第二結像レンズ系７，観察光学系８及び反
射光学系６が配置されている。或いは、第二反射面５で
反射されて観察光学系８の射出端に至るまでの光束が第
一平面Ｂ及び第二平面Ｃの間に収められるようにしても
よい。In addition, the optical axis of the light beam from the second reflecting surface 5 to the exit surface of the observation optical system 8 includes the lower end of the effective reflection area of the second reflecting surface 5 and coincides with the optical axis of the photographing lens system 1. The second imaging lens system 7 and the second imaging lens system 7 are arranged so as to be accommodated between a parallel first plane B and a second plane C including the upper end of the effective reflection area of the second reflection surface 5 and being parallel to the first plane B. The observation optical system 8 and the reflection optical system 6 are arranged. Alternatively, the light beam reflected by the second reflection surface 5 and reaching the exit end of the observation optical system 8 may be stored between the first plane B and the second plane C.
【０００８】上述のような構成を有するファインダー光
学系について更に説明すると、まず、第二反射面５を第
一反射面２に対し高さ方向（撮影画面３の短辺方向）の
近くに配置することで、撮影レンズ系１の光軸からファ
インダー光学系が遠く離れ過ぎないようにする。又、第
二結像レンズ系７の結像倍率の絶対値を１より小さくす
ると、ファインダー光学系の中で第一結像面４の領域で
最も光束が拡大されることになり、それに伴って、第二
反射面５はファインダー光学系の他の光学要素と比較し
て最も大型になる。従って、第二反射面５の有効反射面
よりも撮影レンズ系１の光軸から遠ざかる方向に他の光
学系が突出するように配設されると、ファインダー光学
系の高さがその分だけ大きくなり、カメラ本体の大型化
を招くことになり、好ましくない。尚、有効反射面と
は、第二反射面５を他の部材に固定するために隠れる部
分を除いた、光束を反射させ得る領域をいう。又、これ
ら他の光学要素の設置位置が逆に撮影光軸に近づき過ぎ
ると、シャッター機構やフィルムローディング機構の設
置スペースが侵され、これら機構が反対側に移動させら
れるために外向き方向のスペースが拡張され、やはりカ
メラ本体の大型化につながることになり、好ましくな
い。The finder optical system having the above-described configuration will be further described. First, the second reflecting surface 5 is arranged near the first reflecting surface 2 in the height direction (the short side direction of the photographing screen 3). This prevents the finder optical system from being too far away from the optical axis of the taking lens system 1. Further, if the absolute value of the imaging magnification of the second imaging lens system 7 is made smaller than 1, the luminous flux is expanded most in the area of the first imaging surface 4 in the finder optical system, and accordingly, The second reflecting surface 5 is the largest in comparison with other optical elements of the finder optical system. Therefore, if another optical system is disposed so as to protrude further from the optical axis of the photographing lens system 1 than the effective reflecting surface of the second reflecting surface 5, the height of the finder optical system increases by that much. This leads to an increase in the size of the camera body, which is not preferable. The effective reflection surface refers to a region that can reflect a light beam, excluding a portion that is hidden to fix the second reflection surface 5 to another member. On the other hand, if the installation positions of these other optical elements are too close to the photographing optical axis, the installation space for the shutter mechanism and the film loading mechanism is eroded, and these mechanisms are moved to the opposite side. Is undesirably expanded, which also leads to an increase in the size of the camera body.
【０００９】そこで本発明では、図１において、撮影レ
ンズ系１の光軸を通り撮影画面３の長辺と平行な面を基
準面Ａとし、第二反射面５の有効反射面に関し、基準面
Ａから最も近い部分（下端）を含み且つ基準面Ａに平行
な面を第一平面Ｂとし、基準面Ａから最も遠い部分（上
端）を含み且つ基準面Ａに平行な面を第二平面Ｃとした
場合、第一平面Ｂと第二平面Ｃとの間のスペースに第二
結像レンズ系７及び観察光学系８が配設されるようにす
る。このようにすれば、ファインダー光学系の（撮影画
面３の短辺方向の）高さが第二反射面５の位置付近に抑
えられて小さくなり、小型化されたカメラを実現でき
る。第二反射面５の後方に第二結像レンズ系７と観察光
学系８を一直線状の光軸に沿って配設した場合、ファイ
ンダー光学系の光学要素がカメラ本体の後方に突出する
ことになり、カメラ本体の小型化を達成することが困難
になる。そこで、必要な光路長を確保した状態でファイ
ンダー光学系をコンパクトにするには、少なくとも２枚
以上の反射面で光路を折り曲げることが必要である。そ
のため、本発明では、反射光学系６が第二反射面５と観
察光学系８の間に配設されるように構成した。Therefore, in the present invention, in FIG. 1, a plane passing through the optical axis of the photographing lens system 1 and parallel to the long side of the photographing screen 3 is defined as a reference plane A. A plane including a portion closest to A (lower end) and parallel to the reference plane A is defined as a first plane B, and a plane including a part farthest from the reference plane A (upper end) and parallel to the reference plane A is defined as a second plane C. In this case, the second imaging lens system 7 and the observation optical system 8 are arranged in the space between the first plane B and the second plane C. In this way, the height of the finder optical system (in the direction of the short side of the photographing screen 3) is suppressed to a value near the position of the second reflection surface 5 and becomes small, so that a downsized camera can be realized. When the second imaging lens system 7 and the observation optical system 8 are arranged behind the second reflection surface 5 along a straight optical axis, the optical elements of the finder optical system project behind the camera body. This makes it difficult to reduce the size of the camera body. Therefore, in order to make the finder optical system compact while securing the required optical path length, it is necessary to bend the optical path with at least two or more reflecting surfaces. Therefore, in the present invention, the reflection optical system 6 is configured to be disposed between the second reflection surface 5 and the observation optical system 8.
【００１０】又、第二反射面５から観察光学系８の最後
面までの光路の光軸の方向ベクトルの成分について考え
てみると、この光軸は反射光学系６によって複数回屈曲
させられる。２枚の反射面によって屈曲される前後の光
軸を夫々Ｄ1 ，Ｄ2 とすると、これらの各光軸Ｄ1 ，Ｄ
2 は夫々別々の方向を向いており（同一方向を向いてい
てもよい）、このうち光軸Ｄ1 について説明すると、こ
の光軸Ｄ1 の方向ベクトルを基準面Ａに垂直な方向の成
分Ｄa と、基準面Ａへの射影成分Ｄb とに分解した場
合、基準面Ａに垂直な方向の成分Ｄa より基準面Ａへの
射影成分Ｄb の方が大きければ、この光軸Ｄ1 が撮影レ
ンズ系１の光軸から著しく遠ざかることは防止できる。
光軸Ｄ2 についても同様のことがいえる。従って、図１
に示すＢ面とＣ面の間に挟まれた領域に、第二結像レン
ズ系７と観察光学系８と反射光学系６を収納するために
は、反射光学系６による２枚又はそれ以上の反射面によ
る屈曲前後の各々の光軸Ｄ1 ，Ｄ2 ，‥‥が、下記の条
件を満たす状態で位置するように屈曲されることが必要
である。即ち、光軸Ｄ1 ，Ｄ2 ，‥‥の方向ベクトルに
ついて、基準面Ａに垂直な方向の成分Ｄa の最大値をα
とし、基準面Ａへの射影成分Ｄb の最小値をβとする
と、 α＜β （１） を満たせばよい。これによって、反射光学系６によって
光束が複数回屈曲させられても、基準面Ａに垂直な方向
には光軸Ｄ1 ，Ｄ2 ，‥‥は少しの距離しか移動しない
ので、第二反射面５から観察光学系８に至るまでの間
に、撮影光軸から著しく遠ざかったり、近づいたりする
ことはない。Considering the direction vector component of the optical axis of the optical path from the second reflecting surface 5 to the last surface of the observation optical system 8, this optical axis is bent a plurality of times by the reflective optical system 6. Assuming that the optical axes before and after being bent by the two reflecting surfaces are D 1 and D 2 , respectively, these optical axes D 1 and D 2
2 are directed in different directions (they may be directed in the same direction). Among them, the optical axis D 1 will be described. The direction vector of the optical axis D 1 is a component D in the direction perpendicular to the reference plane A. and a, when decomposed into projection component D b to the reference plane a, the greater the direction of projection component D b to the reference plane a than component perpendicular D a to the reference plane a, the optical axis D 1 Can be prevented from remarkably moving away from the optical axis of the photographing lens system 1.
The same is true for the optical axis D 2. Therefore, FIG.
In order to house the second imaging lens system 7, the observation optical system 8, and the reflection optical system 6 in the region sandwiched between the surfaces B and C shown in FIG. It is necessary that each of the optical axes D 1 , D 2 , の before and after bending by the reflecting surface be bent so as to be positioned in a state satisfying the following condition. That is, the optical axis D 1, D 2, the direction vector of the ‥‥, in the direction perpendicular to the reference plane A the maximum value of the component D a alpha
Assuming that the minimum value of the projected component Db on the reference plane A is β, α <β (1) may be satisfied. Thereby, even if the light beam is bent a plurality of times by the reflecting optical system 6, the optical axis D 1, D 2 in the direction perpendicular to the reference plane A, since ‥‥ does not move only short distance, the second reflecting surface In the period from 5 to the observation optical system 8, there is no remarkable distance or approach from the photographing optical axis.
【００１１】[0011]
【実施例】以下、本発明の好適な実施例について説明す
る。本発明の第一実施例は上述した図２及び図３に示さ
れており、図２は第一結像面４後方のファインダー光学
系の構成を示す平面図であり、上述した構成例と同一の
構成を有しているものである。図３は図２の構成の側面
図である。尚、上述の構成例と同一又は同様の部材には
同一の符号を用いるものとする。図１に示すように、撮
影レンズ系１の後方に、被写体像の撮影光路に対して進
退可能な第一反射面２が配設され、撮影レンズ系１の光
軸と直交する第一反射面２の反射光路上には、被写体像
の第一結像面４と第二反射面５が順次配設されている。
そして、第二反射面５で折り曲げられた光路上に位置す
る後方の光学系は、第二反射面５の有効反射領域の下端
を含む第一平面Ｂ及び上端を含む第二平面Ｃの間を光束
又は光軸が通過するように、配設されている。即ち、反
射光学系６は第三反射面１０と第四反射面１１の２枚の
反射面から成っていて、第二反射面５からの光束の光軸
を第一平面Ｂ及び第二平面Ｃ間のスペース内でＺ字状に
折り曲げるようになっている。又、両反射面１０，１１
間には第二結像レンズ系７が配設され、第四反射面１１
の後方には観察光学系８が配設されている。これによ
り、必要な光路長は確保され、しかもファインダー光学
系の光学要素は撮影光学系の後端を越えてカメラ本体の
後方に突出することはない。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. The first embodiment of the present invention is shown in FIGS. 2 and 3 described above, and FIG. 2 is a plan view showing the configuration of the finder optical system behind the first imaging surface 4, which is the same as the above-described configuration example. It has the structure of. FIG. 3 is a side view of the configuration of FIG. Note that the same reference numerals are used for the same or similar members as those in the above-described configuration example. As shown in FIG. 1, a first reflecting surface 2 is provided behind the taking lens system 1 so as to be able to advance and retreat with respect to a taking optical path of a subject image, and the first reflecting surface is orthogonal to the optical axis of the taking lens system 1. On the two reflected light paths, a first image forming surface 4 and a second reflecting surface 5 of the subject image are sequentially arranged.
Then, the rear optical system located on the optical path bent by the second reflection surface 5 passes between the first plane B including the lower end of the effective reflection area of the second reflection surface 5 and the second plane C including the upper end. The light beam or the optical axis is arranged so as to pass therethrough. That is, the reflection optical system 6 is composed of two reflection surfaces, a third reflection surface 10 and a fourth reflection surface 11, and the optical axis of the light beam from the second reflection surface 5 is set to the first plane B and the second plane C. It is designed to bend in a Z-shape in the space between them. In addition, both reflecting surfaces 10, 11
A second imaging lens system 7 is disposed between the fourth imaging lens system 7 and the fourth reflecting surface 11.
Observation optical system 8 is arranged behind. As a result, the necessary optical path length is secured, and the optical element of the finder optical system does not protrude beyond the rear end of the photographing optical system to the rear of the camera body.
【００１２】本実施例によるファインダー光学系はこの
ように構成されているから、カメラの撮影レンズ系１か
ら入射された被写体像の光束は、第一反射面２で撮影レ
ンズ系１の光軸と直交する方向に折り曲げられ、第一結
像面４に結像される（図１参照）。その後、第二反射面
５で第一平面Ｂ及び第二平面Ｃ間の方向に反射され、図
２に示すように第三反射面１０で折り曲げられて第二結
像レンズ系７を介して像がリレーされ、第四反射面１１
で再び折り曲げられて観察光学系８を通過して、観察さ
れることになる。Since the finder optical system according to the present embodiment is configured as described above, the luminous flux of the subject image incident from the photographic lens system 1 of the camera is reflected by the first reflecting surface 2 on the optical axis of the photographic lens system 1. It is bent in a direction perpendicular to the image and is imaged on the first image plane 4 (see FIG. 1). Thereafter, the light is reflected by the second reflecting surface 5 in the direction between the first plane B and the second plane C, and is bent by the third reflecting surface 10 as shown in FIG. Is relayed to the fourth reflecting surface 11
, And again passes through the observation optical system 8 to be observed.
【００１３】以上のように本実施例では、撮影レンズ系
１の光軸から離れる方向の光路はほぼ第一反射面２と第
二反射面５の間だけであり、しかもこの距離は比較的短
く設定してあるから、ファインダー光学系の高さ即ち撮
影画面の短辺方向の高さを従来のこの種ファインダー光
学系より短くすることができる。しかも、第一平面Ｂと
第二平面Ｃの間にＺ字上に光軸を折り曲げる反射光学系
６が設けられているから、ファインダー光学系の全長も
コンパクトにすることができて、カメラ本体の小型化を
図ることができる。As described above, in this embodiment, the optical path in the direction away from the optical axis of the taking lens system 1 is almost only between the first reflecting surface 2 and the second reflecting surface 5, and this distance is relatively short. Since it is set, the height of the finder optical system, that is, the height in the short side direction of the photographing screen can be made shorter than that of a conventional finder optical system of this kind. Moreover, since the reflecting optical system 6 that bends the optical axis in a Z-shape is provided between the first plane B and the second plane C, the entire length of the finder optical system can be made compact, and The size can be reduced.
【００１４】次に本発明の第二実施例を図４及び図５に
より説明する。図４はファインダー光学系の第一結像面
４及びその後方の光学系の構成を示す平面図であり、図
５は図４の側面図である。本実施例では、第二反射面５
と観察光学系８との間に位置する反射光学系６として４
枚の反射面が設けられており、第三反射面１０及び第四
反射面１１と、第五反射面１２及び第六反射面１３によ
って、光束が２回Ｚ字状に折り曲げられるようになって
いる。第二結像レンズ系７は第四反射面１１と第五反射
面１２の間に配設されている。Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a plan view showing the configuration of the first image forming plane 4 of the finder optical system and the optical system behind it, and FIG. 5 is a side view of FIG. In the present embodiment, the second reflecting surface 5
4 as a reflection optical system 6 located between the
The third reflecting surface 10 and the fourth reflecting surface 11 and the fifth reflecting surface 12 and the sixth reflecting surface 13 allow the light beam to be folded twice into a Z-shape. I have. The second imaging lens system 7 is provided between the fourth reflecting surface 11 and the fifth reflecting surface 12.
【００１５】本実施例では、第一結像面４の中心を通過
する撮影画面３の短辺方向の直線に対して、観察光学系
８を射出する光束の光軸の（撮影光軸方向に対する）ズ
レが小さく、又光束を２回Ｚ字状に折り曲げることで、
第二反射面５の後方に配設される各光学要素も上述の短
辺方向の直線に対してより近接した位置に配設されるこ
とになるから、ファインダー光学系全体の長さが一層短
くなり、よりコンパクトにすることができる。In this embodiment, with respect to a straight line in the short side direction of the photographing screen 3 passing through the center of the first image forming plane 4, the optical axis of the light beam exiting the observation optical system 8 (with respect to the photographing optical axis direction) ) The deviation is small, and the luminous flux is folded twice into a Z-shape,
Since each optical element disposed behind the second reflecting surface 5 is also disposed at a position closer to the above-described straight line in the short side direction, the entire length of the finder optical system is further reduced. And can be made more compact.
【００１６】次に、上述の各実施例におけるファインダ
ー光学系の、第一結像面４より後方の光学系の数値例に
ついて述べる。尚、図６は第一及び第二実施例の光学系
を、反射面を除いて光軸方向に展開した状態の構成図で
ある。 第二結像レンズ系７の焦点距離ｆ＝２４．１０７ｍｍ 観察光学系８の焦点距離ｆ＝２７．５ｍｍ 二次結像倍率は−０．４２１Next, numerical examples of the optical system behind the first image forming plane 4 of the finder optical system in each of the above-described embodiments will be described. FIG. 6 is a configuration diagram showing a state where the optical systems of the first and second embodiments are developed in the optical axis direction except for the reflection surface. Focal length f of the second imaging lens system 7 = 24.107 mm Focal length f of the observation optical system 8 = 27.5 mm The secondary imaging magnification is −0.421.
【００１７】ｒ1 ＝∞（第一結像面４） ｄ1 ＝７３．８９９ ｒ2 ＝９．０６３７ ｄ2 ＝２．４０２１ ｎ1 ＝１．８３４００ ν1 ＝３
７．１６ ｒ3 ＝−４８．８９５１ ｄ3 ＝１．１２８２ ｒ4 ＝−１６．１２１５ ｄ4 ＝０．９４１２ ｎ2 ＝１．７２８２５ ν2 ＝２
８．４６ ｒ5 ＝７．８０２６ ｄ5 ＝４．９８０７ ｒ6 ＝４６．５７０１ ｄ6 ＝２．３９２５ ｎ3 ＝１．７７２５０ ν3 ＝４
９．６６ ｒ7 ＝−２１．１５４８ ｄ7 ＝２７．８３９１ ｒ8 ＝２２．４９２７ ｄ8 ＝６．１６００ ｎ4 ＝１．４９２６０ ν4 ＝５
８．０２ ｒ9 ＝−２４．１４０１（非球面） ｄ9 ＝２５．４４２９ ｒ10＝１９．９５０１（非球面） ｄ10＝３．５２０ ｎ5 ＝１．４９２６０ ν5 ＝５
８．０２ ｒ11＝−９０．０８８７ ｄ11＝１５．００００ ｒ12＝∞（アイポイント）R 1 = ∞ (first imaging plane 4) d 1 = 73.899 r 2 = 9.0637 d 2 = 2.4221 n 1 = 1.83400 v 1 = 3
7.16 r 3 = −48.8951 d 3 = 1.1282 r 4 = −16.1215 d 4 = 0.9412 n 2 = 1.72525 v 2 = 2
8.46 r 5 = 7.8802 d 5 = 4.9807 r 6 = 46.5701 d 6 = 2.3925 n 3 = 1.77250 v 3 = 4
9.66 r 7 = -21.1548 d 7 = 27.8391 r 8 = 22.4927 d 8 = 6.1600 n 4 = 1.49260 v 4 = 5
8.02 r 9 = −24.1401 (aspherical surface) d 9 = 25.4429 r 10 = 19.9501 (aspherical surface) d 10 = 3.520 n 5 = 1.49260 v 5 = 5
8.02 r 11 = -90.0887 d 11 = 15.0000 r 12 = ∞ ( eye point)
【００１８】非球面係数 第９面 Ｐ＝１．００００ Ｅ＝０．６７６１８×１０-4 Ｆ＝−０．６２０９２×１０-7 第１０面 Ｐ＝１．００００ Ｅ＝−０．２２５３９×１０-4 Ｆ＝−０．６２０９２×１０-7 Aspheric surface coefficient Ninth surface P = 1.0000 E = 0.67618 × 10 −4 F = −0.62092 × 10 −7 Tenth surface P = 1.0000 E = −0.22539 × 10 − 4 F = -0.62092 × 10 -7
【００１９】但し、上述の数値例において、ｒ1 ，
ｒ2 ，ｒ3 ，‥‥は各レンズ面の曲率半径、ｄ1 ，
ｄ2 ，ｄ3 ，‥‥は各レンズの肉厚又はレンズ間隔、ｎ
1 ，ｎ2 ，ｎ 3 ，‥‥は各レンズの屈折率、ν1 ，
ν2 ，ν3 ，‥‥は各レンズのアッベ数である。尚、上
述の数値例における非球面形状は、上述の非球面係数を
用いて次の式で表される。但し、光軸方向の座標をＸ、
光軸と垂直な方向の座標をＹとする。又、Ｐは円錐係
数、Ｅは４次の項の非球面係数、Ｆは６次の項の非球面
係数である。 Ｘ＝（Ｙ2 ／ｒ）／｛１＋√（１−ＰＹ2 ／ｒ2 ）｝＋
ＥＹ4 ＋ＦＹ6 However, in the above numerical example, r1,
rTwo, RThree, ‥‥ is the radius of curvature of each lens surface, d1,
dTwo, DThree, ‥‥ are the thickness or lens spacing of each lens, n
1, NTwo, N Three, ‥‥ is the refractive index of each lens, ν1,
νTwo, ΝThree, ‥‥ is the Abbe number of each lens. In addition, above
The aspheric shape in the numerical example described above is obtained by calculating the aspheric coefficient described above.
And is represented by the following equation: However, the coordinates in the optical axis direction are X,
Let Y be the coordinate in the direction perpendicular to the optical axis. P is a cone
A number, E is the aspheric coefficient of the fourth order term, F is the aspheric surface of the sixth order term
It is a coefficient. X = (YTwo/ R) / {1 +} (1-PYTwo/ RTwo)｝ +
EYFour+ FY6
【００２０】[0020]
【発明の効果】上述のように、本発明に係るリレー式フ
ァインダー光学系は、第二反射面で反射された光束の光
軸が第二反射面の有効反射領域の下端と上端を夫々含む
第一平面と第二平面との間に収められるように、第二結
像レンズ系，観察光学系及び少なくとも２枚の反射面が
配置されているから、光学系の高さをより小さくするこ
とができて、ファインダー光学系の小型化を達成でき
る。As described above, in the relay type finder optical system according to the present invention, the optical axis of the light beam reflected by the second reflecting surface includes the lower end and the upper end of the effective reflection area of the second reflecting surface, respectively. Since the second imaging lens system, the observation optical system, and at least two reflecting surfaces are arranged so as to be placed between one plane and the second plane, the height of the optical system can be made smaller. As a result, the size of the finder optical system can be reduced.
【図１】本発明によるファインダー光学系の原理を説明
するための要部斜視図である。FIG. 1 is a perspective view of an essential part for explaining the principle of a finder optical system according to the present invention.
【図２】本発明の原理の構成例を示すと共に第一実施例
でもあるファインダー光学系の要部平面図である。FIG. 2 is a plan view of a main part of a finder optical system according to a first embodiment, showing a configuration example of the principle of the present invention.
【図３】図２の構成の側面部である。FIG. 3 is a side view of the configuration of FIG. 2;
【図４】本発明の第二実施例の要部平面図である。FIG. 4 is a plan view of a main part of a second embodiment of the present invention.
【図５】図４の構成の側面図である。FIG. 5 is a side view of the configuration of FIG. 4;
【図６】第一及び第二実施例の光学系を光軸方向に展開
した図である。FIG. 6 is a diagram in which the optical systems of the first and second embodiments are developed in the optical axis direction.
１……撮影レンズ系、２……第一反射面、３……撮影画
面、４……第一結像面、５……第二反射面、６……反射
光学系、７……第二結像レンズ系、８……観察光学系。Reference numeral 1 denotes a photographing lens system, 2 ... a first reflecting surface, 3 ... a photographing screen, 4 ... a first image forming surface, 5 ... a second reflecting surface, 6 ... a reflecting optical system, 7 ... a second. Imaging lens system, 8 ... Observation optical system.
フロントページの続き (56)参考文献 特開 平２−111932（ＪＰ，Ａ) 特開 平３−217831（ＪＰ，Ａ) 特開 平５−2139（ＪＰ，Ａ) 特開 平３−217829（ＪＰ，Ａ) 特開 平３−217830（ＪＰ，Ａ) 特開 平２−6935（ＪＰ，Ａ) 特開 平２−6934（ＪＰ，Ａ) 特開 平１−128049（ＪＰ，Ａ) 特開 平１−200239（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G03B 13/00 - 13/06 Continuation of the front page (56) References JP-A-2-111932 (JP, A) JP-A-3-217831 (JP, A) JP-A-5-2139 (JP, A) JP-A-3-217829 (JP JP-A-3-217830 (JP, A) JP-A-2-6935 (JP, A) JP-A-2-6934 (JP, A) JP-A-1-128049 (JP, A) 1-2200239 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G03B 13/00-13/06
Claims (7)
ンズ系を通過した光束を二つの光路に分割する第一反射
面と、該一方の反射光路上に撮影レンズ系によって形成
される第一結像面と、該第一結像面を通過した光束を反
射させる第二反射面と、第一結像面上の像を再結像させ
る第二結像レンズ系と、該第二結像レンズ系によって像
が結像する第二結像面と、該第二結像面上の像を観察す
るための観察光学系と、前記第二反射面と観察光学系の
間に設けられた少なくとも２枚の反射面と、が備えられ
たリレー式ファインダー光学系において、前記第一反射面の後方に位置する横長の矩形に形成され
た撮影画面を有し、前記第二反射面を前記第一反射面に
対し前記撮影画面の短辺方向の近くに配置し、 前記第二
反射面から観察光学系の射出面に至るまでの光束の光軸
が、前記第二反射面の有効反射領域の下端を含み且つ撮
影レンズ系の光軸に平行な第一平面と、前記第二反射面
の有効反射領域の上端を含み且つ第一平面に平行な第二
平面との間に収められるように、前記第二結像レンズ
系、観察光学系及び少なくとも２つの反射面を配置し、
前記第二反射面と観察光学系の間に設けられた反射面に
より前記第二反射面からの光束の光軸を前記第一平面及
び前記第二平面間のスペース内で１つ又は２つのＺ字状
に折り曲げる光路を備えてなり、 且つ、前記第二反射面と観察光学系の間に設けられた反
射面による屈曲前後の各々の光軸が、次の条件(1)を満
足する状態で位置するように屈曲され ることを特徴とす
るリレー式ファインダー光学系。 α＜β ……(1) ただし、前記撮影レンズ系の光軸を通り前記撮影画面の
長辺と平行な面を基準面とし、前記各々の光軸の方向ベ
クトルについて、前記基準面に垂直な方向の成分の最大
値をαとし、前記基準面への射影成分の最小値をβとす
る。 1. A photographing lens system in order from an object side, a first reflecting surface for dividing a light beam passing through the photographing lens system into two optical paths, and a first reflecting surface formed by the photographing lens system on one of the reflected optical paths. An image forming surface, a second reflecting surface for reflecting a light beam passing through the first image forming surface, a second image forming lens system for re-imaging an image on the first image forming surface, and the second image forming lens system. A second imaging surface on which an image is formed by an image lens system, an observation optical system for observing an image on the second imaging surface, and a second reflection surface and the observation optical system are provided. A relay type finder optical system provided with at least two reflecting surfaces, wherein the relay type finder optical system is formed in a horizontally-long rectangular shape located behind the first reflecting surface.
Having a shooting screen, wherein the second reflecting surface is provided on the first reflecting surface.
On the other hand, it is arranged near the short side direction of the photographing screen, and the optical axis of the light flux from the second reflection surface to the emission surface of the observation optical system includes the lower end of the effective reflection area of the second reflection surface, and The second coupling unit is disposed between a first plane parallel to the optical axis of the taking lens system and a second plane including the upper end of the effective reflection area of the second reflection surface and parallel to the first plane. Arranging an image lens system , an observation optical system and at least two reflecting surfaces ,
On the reflection surface provided between the second reflection surface and the observation optical system
Further, the optical axis of the light beam from the second reflection surface is shifted from the first plane to the first plane.
And one or two Z-shapes in the space between the second planes
And an optical path provided between the second reflecting surface and the observation optical system.
Each optical axis before and after bending by the launch surface satisfies the following condition (1).
Relay finder optical system, characterized in Rukoto is bent to be positioned in a state of the foot. α <β (1) However, the image of the shooting screen passes through the optical axis of the shooting lens system.
The plane parallel to the long side is used as the reference plane, and the direction
The maximum of the component in the direction perpendicular to the reference plane
Let α be the value and β be the minimum value of the projected component to the reference plane.
You.
ンズ系を通過した光束を二つの光路に分割する第一反射
面と、該一方の反射光路上に撮影レンズ系によって形成
される第一結像面と、該第一結像面を通過した光束を反
射させる第二反射面と、第一結像面上の像を再結像させ
る第二結像レンズ系と、該第二結像レンズ系によって像
が結像する第二結像面と、該第二結像面上の像を観察す
るための 観察光学系と、前記第二反射面と観察光学系の
間に光軸の進路順に設けられた第三反射面、第四反射面
の２枚の反射面と、が備えられたリレー式ファインダー
光学系において、 前記第一反射面の後方に位置する横長の矩形に形成され
た撮影画面を有し、前記第二反射面を前記第一反射面に
対し前記撮影画面の短辺方向の近くに配置し、 前記第二
反射面から観察光学系の射出面に至るまでの光束の光軸
が、前記第二反射面の有効反射領域の下端を含み且つ撮
影レンズ系の光軸に平行な第一平面と、前記第二反射面
の有効反射領域の上端を含み且つ第一平面に平行な第二
平面との間に収められるように、前記第二結像レンズ
系、観察光学系及び前記第三反射面、第四反射面の２枚
の反射面を配置し、前記２枚の反射面により前記第二反
射面からの光束の光軸を前記第一平面及び前記第二平面
間のスペース内で１回Ｚ字状に折り曲げる光路を備えて
なり、 且つ、前記２枚の反射面による屈曲前後の各々の光軸
が、次の条件(1)を満足する状態で位置するように屈曲
され ることを特徴とするリレー式ファインダー光学系。 α＜β ……(1) ただし、前記撮影レンズ系の光軸を通り前記撮影画面の
長辺と平行な面を基準面とし、前記各々の光軸の方向ベ
クトルについて、前記基準面に垂直な方向の成分の最大
値をαとし、前記基準面への射影成分の最小値をβとす
る。 2. A photographing lens system and said photographing lens in order from the object side.
Reflection that splits a light beam passing through a lens system into two light paths
Formed by the taking lens system on the surface and the one reflected light path
The first image forming surface and the light beam passing through the first image forming surface
Re-image the second reflective surface to be projected and the image on the first imaging surface
A second imaging lens system, and an image formed by the second imaging lens system.
Observes a second imaging surface on which the image is formed and an image on the second imaging surface.
And because of the observation optical system, the observation optical system and the second reflecting surface
A third reflecting surface and a fourth reflecting surface provided between the optical axes in the order of travel.
Relay finder with two reflective surfaces
In the optical system, it is formed in a horizontally long rectangle located behind the first reflection surface.
Having a shooting screen, wherein the second reflecting surface is provided on the first reflecting surface.
On the other hand, it is arranged near the short side direction of the shooting screen, and the second
The optical axis of the light beam from the reflecting surface to the exit surface of the observation optical system
Includes the lower end of the effective reflection area of the second reflection surface, and
A first plane parallel to the optical axis of the shadow lens system, and the second reflecting surface
The second plane including the upper end of the effective reflection area of
The second imaging lens so that it can be accommodated between
System, observation optical system and the above-mentioned third reflecting surface and fourth reflecting surface
Are disposed, and the second reflection surface is formed by the two reflection surfaces.
The first plane and the second plane
With an optical path that bends into a Z-shape once in the space between
And each optical axis before and after bending by the two reflecting surfaces
Is bent so that it satisfies the following condition (1)
It is characterized and to Brighter rate finder optical system Rukoto. α <β (1) However, the image of the shooting screen passes through the optical axis of the shooting lens system.
The plane parallel to the long side is used as the reference plane, and the direction
The maximum of the component in the direction perpendicular to the reference plane
Let α be the value and β be the minimum value of the projected component to the reference plane.
You.
ンズ系を通過した光束を二つの光路に分割する第一反射
面と、該一方の反射光路上に撮影レンズ系によって形成
される第一結像面と、該第一結像面を通過した光束を反
射させる第二反射面と、第一結像面上の像を再結像させ
る第二結像レンズ系と、該第二結像レンズ系によって像
が結像する第二結像面と、該第二結像面上の像を観察す
るための観察光学系と、前記第二反射面と観察光学系の
間に光軸の進路順に設けられた第三反射面、第四反射
面、第五反射面、第六反射面の４枚の反射面と、が備え
られたリレー式ファインダー光学系において、 前記第一反射面の後方に位置する横長の矩形に形成され
た撮影画面を有し、前記第二反射面を前記第一反射面に
対し前記撮影画面の短辺方向の近くに配置し、 前記第二
反射面から観察光学系の射出面に至るまでの光束の光軸
が、前記第二反射面の有効反射領域の下端を含み且つ撮
影レンズ系の光軸に平行な第一平面と、前記第二反射面
の有効反射領域の上端を含み且つ第一平面に平行な第二
平面との間に収められるように、前記第二結像レンズ
系、観察光学系及び前記第三反射面乃至第六反射面の４
枚の反射面を配置し、前記４枚の反射面により前記第二
反射面からの光束の光軸を前記第一平面及び前記第二平
面間のスペース内で２回Ｚ字状に折り曲げる光路を備え
てなり、 且つ、前記４枚の反射面による屈曲前後の各々の光軸
が、次の条件(1)を満足する状態で位置するように屈曲
されることを特徴とする リレー式ファインダー光学系。 α＜β ……(1) ただし、前記撮影レンズ系の光軸を通り前記撮影画面の
長辺と平行な面を基準面とし、前記各々の光軸の方向ベ
クトルについて、前記基準面に垂直な方向の成分の最大
値をαとし、前記基準面への射影成分の最小値をβとす
る。 3. A photographic lens system and said photographic lens in order from the object side.
Reflection that splits a light beam passing through a lens system into two light paths
Formed by the taking lens system on the surface and the one reflected light path
The first image forming surface and the light beam passing through the first image forming surface
Re-image the second reflective surface to be projected and the image on the first imaging surface
A second imaging lens system, and an image formed by the second imaging lens system.
Observes a second imaging surface on which the image is formed and an image on the second imaging surface.
Observation optical system for, the second reflective surface and the observation optical system
Third reflecting surface and fourth reflecting surface provided in the order of the optical axis path
Surface, a fifth reflecting surface, and a sixth reflecting surface.
In the relay-type finder optical system, a rectangular oblong located behind the first reflecting surface is formed.
Having a shooting screen, wherein the second reflecting surface is provided on the first reflecting surface.
On the other hand, it is arranged near the short side direction of the shooting screen, and the second
The optical axis of the light beam from the reflecting surface to the exit surface of the observation optical system
Includes the lower end of the effective reflection area of the second reflection surface, and
A first plane parallel to the optical axis of the shadow lens system, and the second reflecting surface
The second plane including the upper end of the effective reflection area of
The second imaging lens so that it can be accommodated between
System, the observation optical system and the fourth to sixth reflecting surfaces.
Two reflective surfaces are arranged, and the second reflective surface is formed by the four reflective surfaces.
The optical axis of the light beam from the reflecting surface is aligned with the first plane and the second plane.
Equipped with an optical path that bends into a Z-shape twice in the space between surfaces
And each optical axis before and after bending by the four reflecting surfaces
Is bent so that it satisfies the following condition (1)
A relay type finder optical system characterized by being performed . α <β (1) However, the image of the shooting screen passes through the optical axis of the shooting lens system.
The plane parallel to the long side is used as the reference plane, and the direction
The maximum of the component in the direction perpendicular to the reference plane
Let α be the value and β be the minimum value of the projected component to the reference plane.
You.
射出端に至るまでの光束が前記第一平面及び第二平面の
間に収められていることを特徴とする請求項１〜３のい
ずれかに記載のリレー式ファインダー光学系。 4. An observation optical system reflected by the second reflection surface.
The luminous flux up to the exit end is equal to the first plane and the second plane.
4. The method as claimed in claim 1, wherein the first and second members are interposed between the first and second members.
The relay-type finder optical system described in any of the above.
が１より小さいことを特徴とする請求項１〜３のいずれ
かに記載のリレー式ファインダー光学系。 5. An absolute value of an imaging magnification of said second imaging lens system.
Is smaller than 1 in any one of claims 1 to 3.
Relay finder optical system according to any.
前記第四反射面との間に配設されていることを特徴とす
る請求項２に記載のリレー式ファインダー光学系。 6. The system according to claim 1, wherein said second imaging lens system is provided with said third reflecting surface.
Characterized in that it is disposed between the fourth reflection surface and the fourth reflection surface.
The relay type finder optical system according to claim 2 .
前記第五反射面との間に配設されていることを特徴とす
る請求項３に記載のリレー式ファインダー光学系。7. The system according to claim 7, wherein said second imaging lens system is provided with said fourth reflecting surface.
Characterized in that it is arranged between the fifth reflection surface.
The relay type finder optical system according to claim 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15819192A JP3213632B2 (en) | 1992-06-17 | 1992-06-17 | Relay type finder optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15819192A JP3213632B2 (en) | 1992-06-17 | 1992-06-17 | Relay type finder optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH063733A JPH063733A (en) | 1994-01-14 |
| JP3213632B2 true JP3213632B2 (en) | 2001-10-02 |
Family
ID=15666260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15819192A Expired - Fee Related JP3213632B2 (en) | 1992-06-17 | 1992-06-17 | Relay type finder optical system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3213632B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11839057B2 (en) | 2019-07-12 | 2023-12-05 | Samsung Electronics Co., Ltd | Apparatus with housing having structure for radiating heat |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5693903B2 (en) | 2010-09-30 | 2015-04-01 | 株式会社シケン | Plated denture and artificial teeth used for it |
-
1992
- 1992-06-17 JP JP15819192A patent/JP3213632B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11839057B2 (en) | 2019-07-12 | 2023-12-05 | Samsung Electronics Co., Ltd | Apparatus with housing having structure for radiating heat |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH063733A (en) | 1994-01-14 |
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