JPS6279229U - - Google Patents
Info
- Publication number
- JPS6279229U JPS6279229U JP15781086U JP15781086U JPS6279229U JP S6279229 U JPS6279229 U JP S6279229U JP 15781086 U JP15781086 U JP 15781086U JP 15781086 U JP15781086 U JP 15781086U JP S6279229 U JPS6279229 U JP S6279229U
- Authority
- JP
- Japan
- Prior art keywords
- half mirror
- reflectance
- transmittance
- mirror
- boundary
- 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 claims 3
- 238000002834 transmittance Methods 0.000 claims 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000004907 flux Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 101100498160 Mus musculus Dach1 gene Proteins 0.000 description 1
Landscapes
- Viewfinders (AREA)
Description
第１図は従来例を示す光路図、第２図は本考案
の一実施例を示す光路図、第３図はフレネルレン
ズの正面図、第４図は平面反射面を構成するプリ
ズムの分解図、第５図は第２図の変形例を示す光
路図、第６図は平面反射面を構成する透明板の正
面図、第７図は本考案の他の実施例を示す光路図
、第８図は第７図の変形例を示す光路図である。
１…ダハミラー、２…フレネルレンズ、２ａ…
フレネル面、２ｂ…ピント面、３，１３…平面反
射面、１３ａ…ハーフミラー面、１３ｂ…反射面
、４…接眼レンズ、７…受光素子。
Fig. 1 is an optical path diagram showing a conventional example, Fig. 2 is an optical path diagram showing an embodiment of the present invention, Fig. 3 is a front view of a Fresnel lens, and Fig. 4 is an exploded view of a prism constituting a flat reflective surface. , FIG. 5 is an optical path diagram showing a modification of FIG. 2, FIG. 6 is a front view of a transparent plate constituting a flat reflective surface, FIG. 7 is an optical path diagram showing another embodiment of the present invention, and FIG. The figure is an optical path diagram showing a modification of FIG. 7. 1...Dach mirror, 2...Fresnel lens, 2a...
Fresnel surface, 2b...Focus surface, 3, 13...Plane reflective surface, 13a...Half mirror surface, 13b...Reflective surface, 4...Eyepiece, 7...Light receiving element.
Claims (1)
れハーフミラーを有する１個の平面反射面とを備
えた１眼レフレツクスカメラのフアインダにおい
て、焦点板の周辺から出る光束がハーフミラー面
外で透過または全反射されてダハミラーに向い、
このダハミラーで反射されたのち前記ハーフミラ
ー面で反射または透過して接眼部へ向うようにハ
ーフミラー面の大きさを定め、このハーフミラー
面とハーフミラー面外の透過または反射面の境界
を透過面の透過率または反射面の反射率が段階的
乃至連続的に変化して境界のハーフミラーの透過
あるいは反射率にほぼ一致されるようにしたこと
を特徴とする１眼レフレツクスカメラのフアイン
ダ。 ２ 前記焦点板はその拡散性が周辺で大きく、中
央部で小乃至になくすようにした実用新案登録請
求の範囲第１項に記載の１眼レフレツクスカメラ
のフアインダ。[Claims for Utility Model Registration] 1. In the viewfinder of a single-lens reflex camera equipped with one roof mirror and one flat reflective surface disposed above the focusing plate and having a half mirror, The light flux emitted from the periphery is transmitted or totally reflected outside the surface of the half mirror and directed towards the roof mirror.
The size of the half mirror surface is determined so that it is reflected by this roof mirror and then reflected or transmitted by the half mirror surface toward the eyepiece, and the boundary between this half mirror surface and the transmission or reflection surface outside the half mirror surface is defined. A single-lens reflex camera characterized in that the transmittance of the transmitting surface or the reflectance of the reflective surface changes stepwise or continuously so that the transmittance or reflectance of the boundary half mirror almost matches the transmittance or reflectance of the boundary half mirror. Fainda. 2. The focus plate for a single-lens reflex camera according to claim 1, wherein the focus plate has a large diffusivity at the periphery and a small to no diffusivity at the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15781086U JPS6279229U (en) | 1986-10-15 | 1986-10-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15781086U JPS6279229U (en) | 1986-10-15 | 1986-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6279229U true JPS6279229U (en) | 1987-05-21 |
Family
ID=31080709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15781086U Pending JPS6279229U (en) | 1986-10-15 | 1986-10-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6279229U (en) |
-
1986
- 1986-10-15 JP JP15781086U patent/JPS6279229U/ja active Pending
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