JPS6432531U - - Google Patents
Info
- Publication number
- JPS6432531U JPS6432531U JP12788187U JP12788187U JPS6432531U JP S6432531 U JPS6432531 U JP S6432531U JP 12788187 U JP12788187 U JP 12788187U JP 12788187 U JP12788187 U JP 12788187U JP S6432531 U JPS6432531 U JP S6432531U
- Authority
- JP
- Japan
- Prior art keywords
- lens part
- objective lens
- optical axis
- waist level
- positive lens
- 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
- 230000003287 optical effect Effects 0.000 claims 3
- 238000005452 bending Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Viewfinders (AREA)
Description
第１図は本考案の基本構成を示す側面図、第２
図はその後面図、第３図は本考案の実施例を示す
図。
１は負のレンズ又はレンズ群、２は正のレンズ
又はレンズ群、３はダハプリズム、３Ａ，３Ｂは
ダハ面、３Ｃはピント面、４はフイールドレンズ
、５はフレネル板。
Figure 1 is a side view showing the basic configuration of the present invention, Figure 2 is a side view showing the basic configuration of the invention.
The figure is a rear view, and FIG. 3 is a diagram showing an embodiment of the present invention. 1 is a negative lens or lens group, 2 is a positive lens or lens group, 3 is a roof prism, 3A and 3B are roof surfaces, 3C is a focusing surface, 4 is a field lens, and 5 is a Fresnel plate.
Claims (1)
ズと、その光軸上後方に配置され対物レンズ光軸
を折曲させるダハ面で形成される反射面とをもつ
た光学素子とを有するウエストレベルフアインダ
ーであつて、前記負レンズ部と正レンズ部の空気
間隔を減少させることにより、広角から望遠へ視
野範囲を変化させる事を特徴とする変倍ウエスト
レベルフアインダー。 A waist level optical element having an objective lens composed of a negative lens part and a positive lens part, and a reflective surface formed by a roof surface disposed rearward on the optical axis of the objective lens and bending the optical axis of the objective lens. A variable power waist level finder, characterized in that the viewing range is changed from wide-angle to telephoto by reducing the air gap between the negative lens part and the positive lens part.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12788187U JPS6432531U (en) | 1987-08-21 | 1987-08-21 | |
| US07/180,451 US4957356A (en) | 1987-04-20 | 1988-04-12 | Finder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12788187U JPS6432531U (en) | 1987-08-21 | 1987-08-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6432531U true JPS6432531U (en) | 1989-03-01 |
Family
ID=31380708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12788187U Pending JPS6432531U (en) | 1987-04-20 | 1987-08-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6432531U (en) |
-
1987
- 1987-08-21 JP JP12788187U patent/JPS6432531U/ja active Pending
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