JPS60189002U - Prism for finder - Google Patents
Prism for finderInfo
- Publication number
- JPS60189002U JPS60189002U JP7556584U JP7556584U JPS60189002U JP S60189002 U JPS60189002 U JP S60189002U JP 7556584 U JP7556584 U JP 7556584U JP 7556584 U JP7556584 U JP 7556584U JP S60189002 U JPS60189002 U JP S60189002U
- Authority
- JP
- Japan
- Prior art keywords
- prism
- reflecting
- incident
- finder
- 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.)
- Pending
Links
Landscapes
- Viewfinders (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は本考案に係る電子カメラのファインダー光学系
として好ましい光学系の概略図、゛第２図、第３図は各
々本！案に操るファインダー用プリズムの斜視図と光路
図、第４図は本考案のファインダー用プリズムの一実施
例の斜視図、第５図は切欠き部を省略した本考案のファ
インダー用プリズムの位置決めをする際の途中段階の説
明図である。
図中１は撮影レンズ、２は可動鏡、３はローパスフィル
ター、４はシャッターユニット、５は保護ガラス、６は
撮像面、７は撮影体のパッケージ、８は補正板、９はフ
ォーカシングスクリーン、１０は第１プリズム、１１は
第２プリズム、１２は接眼レンズ、１３は瞳位置、Ｓｌ
、Ｓ、は入射面、Ｓ２は第１反射面、Ｓ、′は第２反射
面、Ｓ３は射出面、Ｄはダハ面の稜線、＄４′は第４反
射面、Ｓ６は射出面、４０４，４０５は各々切欠き部で
ある。
第１図
富’ｚｔｂFig. 1 is a schematic diagram of an optical system preferable as a finder optical system of an electronic camera according to the present invention, and Figs. 2 and 3 are each a book! Fig. 4 is a perspective view of an embodiment of the finder prism of the present invention, and Fig. 5 shows the positioning of the finder prism of the present invention with the notch omitted. It is an explanatory diagram of an intermediate stage when doing so. In the figure, 1 is a photographing lens, 2 is a movable mirror, 3 is a low-pass filter, 4 is a shutter unit, 5 is a protective glass, 6 is an imaging surface, 7 is a package for a photographic object, 8 is a correction plate, 9 is a focusing screen, 10 is the first prism, 11 is the second prism, 12 is the eyepiece, 13 is the pupil position, Sl
, S, is the incident surface, S2 is the first reflective surface, S,' is the second reflective surface, S3 is the exit surface, D is the ridgeline of the roof surface, $4' is the fourth reflective surface, S6 is the exit surface, 404 , 405 are notches. Figure 1 wealth'ztb
Claims (1)
と前記入射面Ｓ１より入射した光束を前記入射面Ｓ、と
同一の平面ＳＳ１上にある第２反射面Ｓ□′方−向へ反
射させる為の第１反射面Ｓ２と前記第１反射゛
面Ｓ２そして前記第２反射面８１′、の順で反射した光
束を射出させる為の射出面Ｓ３とを有する第１プリズム
と前記第１プリズムの射出面Ｓ３から射出してきた光束
を入射させる為の入射面Ｓ４と前記入射面Ｓ４と同一の
平面ＳＳ４上にある第４反射面Ｓ、／方向に・反射させ
る為の２つの反射面Ｓ５ｔ Ｓ５’、からなるダハ面Ｓ
５５′と前記ダハ面Ｓ５．′そして前記第４反射面Ｓ、
／の順で反射した光束を射出させる為の射出面Ｓ６とを
有する第２プリズムの２つのプリズムを有したファイン
ダー用プリズムにおいて前記第２プリズムの平面ＳＳ４
と前記反射面Ｓ５若しくは前記反射面８５′と前記射出
面Ｓ６とで形成される部分に切欠き部を設けたことを特
徴とするファインダー用プリズム。Incidence surface S□ for entering the light beam for observing the object image
and a first reflecting surface S2 for reflecting the light beam incident from the incident surface S1 in the direction of a second reflecting surface S□′ located on the same plane SS1 as the incident surface S, and the first reflecting surface S
A first prism having an exit surface S3 for emitting the light beam reflected in the order of surface S2 and the second reflecting surface 81'; A roof surface S consisting of an incident surface S4, a fourth reflective surface S located on the same plane SS4 as the incident surface S4, and two reflective surfaces S5t and S5' for reflection in the / direction.
55' and the roof surface S5. ′ and the fourth reflective surface S,
In the finder prism having two prisms, the second prism has an exit surface S6 for emitting the reflected light flux in the order of /, the plane SS4 of the second prism.
A finder prism characterized in that a notch is provided in a portion formed by the reflecting surface S5 or the reflecting surface 85' and the exit surface S6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7556584U JPS60189002U (en) | 1984-05-23 | 1984-05-23 | Prism for finder |
| US06/729,292 US4592636A (en) | 1984-05-07 | 1985-05-01 | View finder optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7556584U JPS60189002U (en) | 1984-05-23 | 1984-05-23 | Prism for finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60189002U true JPS60189002U (en) | 1985-12-14 |
Family
ID=30616900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7556584U Pending JPS60189002U (en) | 1984-05-07 | 1984-05-23 | Prism for finder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60189002U (en) |
-
1984
- 1984-05-23 JP JP7556584U patent/JPS60189002U/en active Pending
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