JPS63165638U - - Google Patents
Info
- Publication number
- JPS63165638U JPS63165638U JP1987058980U JP5898087U JPS63165638U JP S63165638 U JPS63165638 U JP S63165638U JP 1987058980 U JP1987058980 U JP 1987058980U JP 5898087 U JP5898087 U JP 5898087U JP S63165638 U JPS63165638 U JP S63165638U
- Authority
- JP
- Japan
- Prior art keywords
- projector
- transmittance
- fresnel lens
- changing means
- screen
- 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.)
- Granted
Links
- 238000002834 transmittance Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 description 2
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987058980U JPH0522929Y2 (uk) | 1987-04-17 | 1987-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987058980U JPH0522929Y2 (uk) | 1987-04-17 | 1987-04-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63165638U true JPS63165638U (uk) | 1988-10-28 |
| JPH0522929Y2 JPH0522929Y2 (uk) | 1993-06-11 |
Family
ID=30890048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987058980U Expired - Lifetime JPH0522929Y2 (uk) | 1987-04-17 | 1987-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0522929Y2 (uk) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008083687A (ja) * | 2006-08-28 | 2008-04-10 | Seiko Epson Corp | スクリーン、及びプロジェクタ |
-
1987
- 1987-04-17 JP JP1987058980U patent/JPH0522929Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008083687A (ja) * | 2006-08-28 | 2008-04-10 | Seiko Epson Corp | スクリーン、及びプロジェクタ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0522929Y2 (uk) | 1993-06-11 |