JPS6426703U - - Google Patents
Info
- Publication number
- JPS6426703U JPS6426703U JP12037987U JP12037987U JPS6426703U JP S6426703 U JPS6426703 U JP S6426703U JP 12037987 U JP12037987 U JP 12037987U JP 12037987 U JP12037987 U JP 12037987U JP S6426703 U JPS6426703 U JP S6426703U
- Authority
- JP
- Japan
- Prior art keywords
- fresnel lens
- circular
- lens
- fresnel
- focal length
- 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
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12037987U JPS6426703U (fr) | 1987-08-07 | 1987-08-07 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12037987U JPS6426703U (fr) | 1987-08-07 | 1987-08-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6426703U true JPS6426703U (fr) | 1989-02-15 |
Family
ID=31366433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12037987U Pending JPS6426703U (fr) | 1987-08-07 | 1987-08-07 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6426703U (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH047987A (ja) * | 1990-04-25 | 1992-01-13 | Pioneer Electron Corp | リアプロジェクションテレビの製造方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61129602A (ja) * | 1984-11-29 | 1986-06-17 | Nissan Motor Co Ltd | フルネルレンズの構造 |
JPS62118304A (ja) * | 1985-11-18 | 1987-05-29 | Asahi Optical Co Ltd | フレネル状レンズ |
-
1987
- 1987-08-07 JP JP12037987U patent/JPS6426703U/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61129602A (ja) * | 1984-11-29 | 1986-06-17 | Nissan Motor Co Ltd | フルネルレンズの構造 |
JPS62118304A (ja) * | 1985-11-18 | 1987-05-29 | Asahi Optical Co Ltd | フレネル状レンズ |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH047987A (ja) * | 1990-04-25 | 1992-01-13 | Pioneer Electron Corp | リアプロジェクションテレビの製造方法 |
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