JPS6417531U - - Google Patents
Info
- Publication number
- JPS6417531U JPS6417531U JP11158187U JP11158187U JPS6417531U JP S6417531 U JPS6417531 U JP S6417531U JP 11158187 U JP11158187 U JP 11158187U JP 11158187 U JP11158187 U JP 11158187U JP S6417531 U JPS6417531 U JP S6417531U
- Authority
- JP
- Japan
- Prior art keywords
- imaging lens
- prism surface
- center point
- reflective fresnel
- 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
- 238000003384 imaging method Methods 0.000 claims description 4
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11158187U JPS6417531U (en18) | 1987-07-21 | 1987-07-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11158187U JPS6417531U (en18) | 1987-07-21 | 1987-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6417531U true JPS6417531U (en18) | 1989-01-27 |
Family
ID=31349751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11158187U Pending JPS6417531U (en18) | 1987-07-21 | 1987-07-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6417531U (en18) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5557840A (en) * | 1978-10-24 | 1980-04-30 | Gakken Co Ltd | Overhead projector capable of projecting on vertical plane |
-
1987
- 1987-07-21 JP JP11158187U patent/JPS6417531U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5557840A (en) * | 1978-10-24 | 1980-04-30 | Gakken Co Ltd | Overhead projector capable of projecting on vertical plane |