JP2518068Y2 - Movable mirror device for single-lens reflex camera - Google Patents
Movable mirror device for single-lens reflex cameraInfo
- Publication number
- JP2518068Y2 JP2518068Y2 JP1986008630U JP863086U JP2518068Y2 JP 2518068 Y2 JP2518068 Y2 JP 2518068Y2 JP 1986008630 U JP1986008630 U JP 1986008630U JP 863086 U JP863086 U JP 863086U JP 2518068 Y2 JP2518068 Y2 JP 2518068Y2
- Authority
- JP
- Japan
- Prior art keywords
- mirror
- movable mirror
- main mirror
- light
- light beam
- 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 - Lifetime
Links
Landscapes
- Cameras In General (AREA)
Description
【考案の詳細な説明】 （考案の技術分野） 本考案は一眼レフレックスカメラの可動ミラー、特に
その可動ミラーの一部を透過した光を測光または焦点検
出に用いる一眼レフレックスカメラの可動ミラーの構造
に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a movable mirror of a single-lens reflex camera, and more particularly to a movable mirror of a single-lens reflex camera that uses light transmitted through a part of the movable mirror for photometry or focus detection. Regarding the structure.
従来、この種の可動ミラーには、自動露出（以下「A
E」と称する。）もしくは自動焦点調節（以下「AF」と
称する。）に必要な光線の通過部分のみを半透過鏡に形
成し、他の部分は全反射鏡としたものや、全面を半透鏡
に形成すると共に、撮影時に撮影光路内に有害光が入ら
ないようにミラーとミラー保持枠との間に遮光板を配置
したもの等が知られている。Conventionally, this type of movable mirror has had automatic exposure (hereinafter "A
E ". ) Or only a portion of the light beam necessary for automatic focus adjustment (hereinafter referred to as “AF”) is formed on the semi-transmissive mirror, and the other portion is a total reflection mirror, or the entire surface is formed on the semi-transparent mirror. It is known that a shading plate is arranged between a mirror and a mirror holding frame so that harmful light does not enter the shooting optical path during shooting.
しかしながら、一部を半透過面とし、他の全部を全反
射面に形成された前者の装置では、ミラーの反射率が光
線の透過する中央部分と全反射する残りの部粉とで反射
率が異なるため、使用される撮影レンズによっては、フ
ァインダー上でミラー中央部分が暗くなったりあるい
は、その反射光を用いてファインダー側でAE制御を行な
う場合には、使用する撮影レンズの明るさによって半透
過部の影響する割合が変化するため、その変化に、対す
る補正が必要となる欠点が有った。また、全面が半透過
鏡で形成され裏面に遮光板を設けた後者の装置では、ミ
ラー裏面による内部反射を除去できないため、ミラーの
裏面で反射した光によりフレアが発生したり、半透過鏡
を通してミラーの接着部が撮影レンズ側から見えて、見
苦しい等の欠点が有った。However, in the former device in which one part is a semi-transmissive surface and the other part is a total reflection surface, the reflectance of the mirror is different between the central portion where the light ray is transmitted and the remaining part powder which is totally reflected. Depending on the shooting lens used, the central part of the mirror may be dark on the viewfinder, or if the reflected light is used for AE control on the viewfinder side, it may be semi-transparent depending on the brightness of the shooting lens used. Since there is a change in the ratio of the influence of the parts, there is a drawback that the change needs to be corrected. Also, in the latter device where the entire surface is formed of a semi-transmissive mirror and a light-shielding plate is provided on the back surface, internal reflection due to the back surface of the mirror cannot be removed, so flare may occur due to light reflected on the back surface of the mirror, or through a semi-transmissive mirror The mirror adhesion part was visible from the side of the taking lens, which was unsightly.
（考案の目的） 本考案は、上記従来装置の欠点を解決し、測光や焦点
検出等に有害な光を効果的に除去すると共に均質な反射
光をファインダー側および背後の受光部側へ導くことが
できる可動ミラー装置を提供することを目的とする。(Object of the Invention) The present invention solves the above-mentioned drawbacks of the conventional device, effectively removes harmful light for photometry, focus detection, and the like, and guides uniform reflected light to the finder side and the light receiving part side behind. It is an object of the present invention to provide a movable mirror device capable of performing the above.
（考案の概要） 上記の目的を達成するために、可動ミラーの全面の全
域を半透過鏡に形成すると共に、裏面に測光または焦点
検出に必要な光線通過部分を残して略全面に黒色塗料を
施して塗膜を密着させ、その塗膜によって光線通過開口
を形成すると共にその塗膜の密着面に達して内部反射す
る光を吸収させるように構成することを技術的要点とす
るものである。(Summary of the Invention) In order to achieve the above-mentioned object, the entire surface of the movable mirror is formed as a semi-transmissive mirror, and a black paint is applied to almost the entire surface, leaving a light beam passing portion necessary for photometry or focus detection on the back surface. It is a technical point that the coating is applied to bring the coating into close contact, the light passage opening is formed by the coating, and the light that reaches the contact surface of the coating and is internally reflected is absorbed.
以下、本考案の実施例を添付の図面に基づいて詳しく
説明する。Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
第１図は、本考案の実施例を示す断面図で、第２図
は、第１図に示す実施例を組み込んだ一眼レフレックス
カメラの断面図、第３図は第１図の実施例装置が撮影光
路外へ退避したときの状態を示す断面図である。第２図
に示す如く、撮影レンズ１を通過した光は、撮影光路上
に傾斜して設けられた本考案の要部を構成する可動ミラ
ー２により、その一部は反射されてファインダー側へ導
かれ、残りの一部は透過するが、その透過光の一部は、
可動ミラー２の背後に設けられた副ミラー３により、反
射されて下方へ導かれる。ファインダー側へ反射された
光は、焦点板４上に被写体像を結ぶがその像は、ペンタ
プリズム５および接眼レンズ６を介して観察される。ま
た、副ミラー３にて反射した光はカメラ本体の底部に配
置された検出装置７へ導かれ、AEもしくはAFの検出が行
われる。また、カメラが撮影状態にあるときは、可動ミ
ラー２と副ミラー３とは、共に撮影光路外の退避位置
（第２図で破線にて示す位置）まで上昇退避するように
構成されている。FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view of a single-lens reflex camera incorporating the embodiment shown in FIG. 1, and FIG. 3 is an embodiment apparatus of FIG. FIG. 6 is a cross-sectional view showing a state when the image sensor is retracted from the photographing optical path. As shown in FIG. 2, the light that has passed through the taking lens 1 is partially reflected by a movable mirror 2 which is provided on the taking optical path and which is a main part of the present invention, and is guided to the finder side. And some of the remaining light is transmitted, but some of the transmitted light is
The sub-mirror 3 provided behind the movable mirror 2 reflects and guides it downward. The light reflected to the finder side forms an object image on the focusing screen 4, and the image is observed through the pentaprism 5 and the eyepiece lens 6. Further, the light reflected by the sub mirror 3 is guided to a detection device 7 arranged at the bottom of the camera body, and AE or AF is detected. Further, when the camera is in the shooting state, both the movable mirror 2 and the sub mirror 3 are configured to be lifted and retracted to the retracted position outside the photographing optical path (the position shown by the broken line in FIG. 2).
可動ミラー２は、第１図に示す如く、撮影レンズ側の
表面の全域が半透過鏡2aにて形成され、その裏面を保持
する可動ミラー保持枠８は軸９によって回動可能にカメ
ラのミラーボックスに支持されている。さらに、可動ミ
ラー２の裏面は、撮影光軸上の開口部10aを残して第４
図に示すように全面に黒色塗料による黒色塗膜10が塗布
されている。また、他方の副ミラー３は、全反射鏡であ
って、副ミラー保持枠11に保持され、可動ミラー２に連
動して、退避位置へ移動したときに、第３図に示すよう
に副ミラー保持枠11が可動ミラー保持枠８の裏面に接す
るように構成されている。なお、可動ミラー２と副ミラ
ー３とは、共に接着等によりそれぞれの保持枠８、11に
固定されている。As shown in FIG. 1, the movable mirror 2 has a semi-transmissive mirror 2a formed on the entire surface on the side of the taking lens, and a movable mirror holding frame 8 for holding the back surface of the movable mirror 2 is rotatable about an axis 9 so that the movable mirror holding frame 8 can rotate. Supported by the box. Further, the rear surface of the movable mirror 2 is left at the fourth position leaving the opening 10a on the photographing optical axis.
As shown in the figure, a black coating film 10 of black paint is applied to the entire surface. The other sub-mirror 3 is a total reflection mirror, is held by the sub-mirror holding frame 11, and is interlocked with the movable mirror 2 to move to the retracted position, as shown in FIG. The holding frame 11 is configured to contact the back surface of the movable mirror holding frame 8. The movable mirror 2 and the sub mirror 3 are both fixed to the holding frames 8 and 11 by adhesion or the like.
第１図および第２図に示す実施例は上記のように構成
されているので、検出装置７の検出に必要な光線L2は、
可動ミラー２の半透過鏡２を透過し、裏面の黒色塗膜10
が施されていない領域の開口10aを通過して副ミラー３
へと導かれ、検出装置７へ入射する。一方、ファインダ
ー観察に必要な光線L1は、半透過鏡2aで反射されて焦点
板４へ導かれる。ここで、撮影レンズ１からの光線のう
ち、半透過鏡2aで反射された光線Ａの残りの透過光線Ｂ
（第１図参照）は、可動ミラー２の裏面に密着した黒色
塗膜10によって吸収される。特に撮影レンズ１の下方か
ら斜め上方へ入射して可動ミラー２の裏面にて内部反射
しようとする光は、その黒色塗膜10によって殆んど吸収
されるので、実質的に有害なフレア光が除去される。Since the embodiment shown in FIGS. 1 and 2 is configured as described above, the light ray L 2 required for detection by the detection device 7 is
The black coating 10 on the back surface that passes through the semi-transmissive mirror 2 of the movable mirror 2.
The sub-mirror 3 passes through the opening 10a in the area not covered with
And is incident on the detection device 7. On the other hand, the light ray L 1 necessary for finder observation is reflected by the semi-transmissive mirror 2a and guided to the focusing screen 4. Here, of the light rays from the taking lens 1, the remaining transmitted light rays B of the light ray A reflected by the semi-transmissive mirror 2a.
(See FIG. 1) is absorbed by the black coating film 10 that is in close contact with the back surface of the movable mirror 2. Particularly, the light that enters obliquely upward from the lower side of the taking lens 1 and is internally reflected by the back surface of the movable mirror 2 is almost absorbed by the black coating film 10, so that substantially harmful flare light is generated. To be removed.
第３図は、可動ミラー２と副ミラー３の撮影時の状
態、すなわち第２図において破線にて示す２′、３′の
位置に各ミラーが在る時の状態を示している。このと
き、副ミラー３は可動ミラー８に対してほぼ平行となる
位置まで回動し、副ミラー保持枠11は可動ミラー保持枠
８に密着して開口部10aを覆う。この場合、可動ミラー
保持枠８の開口部8aを覆いきれずに生じる副ミラー保持
枠11との間のすきま8bは可動ミラー２の裏面に塗布され
た黒色塗膜10によって覆われるように構成されているの
で、ファインダーの接眼レンズ６を通して逆入射する有
害光Ｃは、その黒色塗料塗布部によってカットされ、効
果的に除去される。FIG. 3 shows a state of the movable mirror 2 and the sub mirror 3 at the time of photographing, that is, a state in which the respective mirrors are located at positions 2'and 3'shown by broken lines in FIG. At this time, the sub mirror 3 is rotated to a position substantially parallel to the movable mirror 8, and the sub mirror holding frame 11 is in close contact with the movable mirror holding frame 8 to cover the opening 10a. In this case, the gap 8b between the movable mirror holding frame 8 and the sub-mirror holding frame 11 that cannot be completely covered with the opening 8a is covered by the black coating film 10 applied to the back surface of the movable mirror 2. Therefore, the harmful light C that is incident back through the eyepiece lens 6 of the finder is cut by the black paint application portion and effectively removed.
第４図は、開口部10aを残して裏面全面を黒色塗膜10
を施した可動反射鏡２の平面図で、破線で示す部分に接
着剤等を塗って可動ミラー保持枠８に可動ミラー２を接
着支持させてもその接着部は黒色塗膜10によって隠され
る。従って、半透過鏡2a側からその接着部分は見えず、
美観を損ねるようなことが無い。また第５図は、開口部
10aと周辺部10bとを残して黒色塗膜10を施した、第４図
とは別の実施例を示す可動ミラー２の平面図である。第
４図のように周辺の端部まで塗料を塗布した場合、やや
もすると、その塗料が可動ミラー２の側面にまでまわ
り、表面の半透過面を通して見苦しく見えることがあ
る。しかし、第５図のように周辺の縁部を0.5mm〜2mm程
度残して塗布することにより、そのような問題を解決す
ることができる。この場合、その縁部の塗装しない部分
ではわずかに内部反射が起きるが実質的に有害となる程
に内部反射光が生じることは無い。また、この黒色塗料
の塗布されない小面積部分をミラー周辺部に数個所設
け、この塗布されない部分を保持枠への取付け基準面と
し、塗料の塗布された部分を接着剤にて保持枠に固定し
てもよい。この場合、黒色塗料をスクリーン印刷等で塗
布すれば、所定の位置に、所定の小面積で塗布されない
取付け基準面を形成できるので、その取付け基準面は半
透過鏡2a側からは殆んど見えず、しかも、小面積のため
その取付け基準面から内面反射する光が実質的に有害な
フレアとなるようなことは無い。FIG. 4 shows a black coating film 10 on the entire back surface, leaving the opening 10a.
In the plan view of the movable reflecting mirror 2 provided with the above, even if the movable mirror holding frame 8 is made to adhere and support the movable mirror 2 by applying an adhesive or the like to the portion shown by the broken line, the adhesive portion is hidden by the black coating film 10. Therefore, the adhesive portion cannot be seen from the semi-transparent mirror 2a side,
There is no loss of aesthetics. Figure 5 shows the opening
FIG. 6 is a plan view of a movable mirror 2 showing another embodiment different from FIG. 4 in which a black coating film 10 is applied while leaving 10a and a peripheral portion 10b. When the paint is applied to the peripheral edges as shown in FIG. 4, the paint may even reach the side surface of the movable mirror 2 and look unsightly through the semi-transmissive surface. However, such a problem can be solved by applying the coating while leaving a peripheral edge of about 0.5 mm to 2 mm as shown in FIG. In this case, a slight internal reflection occurs in the unpainted portion of the edge portion, but the internal reflection light does not occur to such an extent that it is substantially harmful. In addition, several small areas where this black paint is not applied are provided in the peripheral part of the mirror, and the areas where this paint is not applied are used as reference surfaces for attachment to the holding frame, and the parts where the paint is applied are fixed to the holding frame with an adhesive. May be. In this case, if a black paint is applied by screen printing or the like, a mounting reference surface that is not applied in a predetermined small area can be formed at a predetermined position, so that the mounting reference surface is almost visible from the semitransparent mirror 2a side. Moreover, because of the small area, the light internally reflected from the mounting reference surface does not substantially become a harmful flare.
（考案の効果） 以上の如く本考案によれば、可動ミラーの表面の全面
を半透過鏡とし、その裏面に光の通過可能な開口部を残
して黒色塗料を塗布したので、ファインダー観察時に、
可動ミラーの裏面で内部反射する光を吸収除去でき、し
かもファインダーが部分的に暗くなることが無いように
一様な反射を全面でさせることができる。また、可動ミ
ラーの裏面の光線通過部を前記の黒色塗料によって必要
最小限度に区画することができ、さらに、その可動ミラ
ーを接着剤等で可動ミラー保持枠に接着固定する場合に
も、その接着部を黒色塗料によって隠すことができるの
で、可動ミラーの接着跡が見えない。従って、撮影レン
ズ側から見て美観を損なうことなく、可動ミラーを保持
枠に強固に接着固定できる利点がある。また、黒色塗料
塗布部に接着剤を塗布するため、接着剤により主ミラー
の反射率が変化することも無く、略均一な反射光を得る
ことができ、ファイダー視認効果を略均一とすることも
できる。(Effect of the Invention) As described above, according to the present invention, the entire surface of the movable mirror is a semi-transmissive mirror, and black paint is applied to the rear surface of the movable mirror, leaving an opening through which light can pass.
The light internally reflected on the back surface of the movable mirror can be absorbed and removed, and moreover, uniform reflection can be performed on the entire surface so that the viewfinder is not partially darkened. In addition, the light passing portion on the back surface of the movable mirror can be partitioned to the minimum required by the black paint, and when the movable mirror is adhesively fixed to the movable mirror holding frame with adhesive, Since the part can be hidden by black paint, the adhesion mark of the movable mirror cannot be seen. Therefore, there is an advantage that the movable mirror can be firmly adhered and fixed to the holding frame without impairing the appearance when viewed from the photographing lens side. In addition, since the adhesive is applied to the black paint application part, the reflectance of the main mirror does not change due to the adhesive, substantially uniform reflected light can be obtained, and the visual effect of the finder can be made substantially uniform. it can.
第１図は本考案の実施例を示す断面図で、第２図は一眼
レフレックスカメラ内に組み込ました第１図に示す実施
例の概略配置図、第３図は、第１図に示す可動ミラーと
副ミラーとが撮影光路外に退避した状態を示す断面図、
第４図は、第１図に示す可動ミラーの平面図で、第５図
は第４図とは塗料塗布面を異にする可動ミラーの平面図
である。 （主要部分の符号の説明） １……撮影レンズ、２……可動ミラー 2a……半透過面、３……副ミラー ７……検出装置、８……可動ミラー保持枠 10……黒色塗膜 10a……開口部（光線通過部分） 11……副ミラー保持枠1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a schematic layout view of the embodiment shown in FIG. 1 incorporated in a single-lens reflex camera, and FIG. 3 is a movable view shown in FIG. A sectional view showing a state in which a mirror and a sub mirror are retracted out of a photographing optical path,
4 is a plan view of the movable mirror shown in FIG. 1, and FIG. 5 is a plan view of the movable mirror having a coating surface different from that of FIG. (Explanation of symbols of main parts) 1 ... Shooting lens, 2 ... Movable mirror 2a ... Semi-transmissive surface, 3 ... Secondary mirror 7 ... Detection device, 8 ... Movable mirror holding frame 10 ... Black coating film 10a …… Aperture (light passing part) 11 …… Sub-mirror holding frame
Claims (2)
たは焦点検出を行なう一眼レフレックスカメラの可動ミ
ラー装置において、 前記撮影レンズ側に面した前面の全域を半透過鏡に形成
されており、前記撮影レンズを透過した光束の一部をフ
ァインダー側に反射し、且つ一部を透過する主ミラー
と、 前記主ミラーを保持するとともに、該主ミラーを透過し
た光束を通過せしめる開口部を備えた保持部材と、 前記主ミラーを透過し且つ前記開口部を透過した光束
を、測光装置または焦点検出装置に導くサブミラーとを
有し、 前記主ミラーの裏面の、前記測光または焦点検出に必要
な光束通過部分以外の略全域に、黒色塗膜を直接塗布す
るとともに、 前記黒色塗膜塗布部と前記保持部材との間に塗布された
接着剤により、前記主ミラーと前記保持部材とを固着す
ることを特徴とする一眼レフレックスカメラの可動ミラ
ー装置。1. A movable mirror device of a single-lens reflex camera for performing photometry or focus detection using a light flux transmitted through a taking lens, wherein a front surface facing the taking lens is formed with a semi-transparent mirror. A main mirror that reflects a part of the light beam that has passed through the taking lens to the finder side and that transmits a part of the light beam, and an opening that holds the main mirror and allows the light beam that has passed through the main mirror to pass through A holding member and a sub-mirror that guides a light beam that has passed through the main mirror and has passed through the opening to a photometric device or a focus detection device, and a light beam necessary for the photometric or focus detection on the back surface of the main mirror. The black coating film is directly applied to almost the entire area except the passing portion, and the main mirror and the front portion are formed by the adhesive applied between the black coating film application portion and the holding member. Single-lens reflex camera movable mirror device, characterized by fixing the holding member.
束通過部分及び周辺端部を除いて、該主ミラー裏面の全
域に塗布されていることを特徴とする実用新案登録請求
の範囲第１項に記載の可動ミラー装置。2. The utility model registration claim, wherein the black coating film is applied to the entire area of the rear surface of the main mirror except for the light flux passing portion and the peripheral end portion of the main mirror. The movable mirror device according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986008630U JP2518068Y2 (en) | 1986-01-24 | 1986-01-24 | Movable mirror device for single-lens reflex camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986008630U JP2518068Y2 (en) | 1986-01-24 | 1986-01-24 | Movable mirror device for single-lens reflex camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62120748U JPS62120748U (en) | 1987-07-31 |
| JP2518068Y2 true JP2518068Y2 (en) | 1996-11-20 |
Family
ID=30793185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986008630U Expired - Lifetime JP2518068Y2 (en) | 1986-01-24 | 1986-01-24 | Movable mirror device for single-lens reflex camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2518068Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57112320U (en) * | 1980-12-27 | 1982-07-12 | ||
| JPS57132124A (en) * | 1981-02-09 | 1982-08-16 | Canon Inc | Photometric device of single-lens reflex camera |
-
1986
- 1986-01-24 JP JP1986008630U patent/JP2518068Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62120748U (en) | 1987-07-31 |
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