JPH019948Y2 - - Google Patents
Info
- Publication number
- JPH019948Y2 JPH019948Y2 JP1979155263U JP15526379U JPH019948Y2 JP H019948 Y2 JPH019948 Y2 JP H019948Y2 JP 1979155263 U JP1979155263 U JP 1979155263U JP 15526379 U JP15526379 U JP 15526379U JP H019948 Y2 JPH019948 Y2 JP H019948Y2
- Authority
- JP
- Japan
- Prior art keywords
- fresnel lens
- linear fresnel
- sheets
- lens sheet
- 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.)
- Expired
Links
- 238000009792 diffusion process Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Transforming Electric Information Into Light Information (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1979155263U JPH019948Y2 (de) | 1979-11-08 | 1979-11-08 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1979155263U JPH019948Y2 (de) | 1979-11-08 | 1979-11-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5674430U JPS5674430U (de) | 1981-06-18 |
JPH019948Y2 true JPH019948Y2 (de) | 1989-03-20 |
Family
ID=29667303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1979155263U Expired JPH019948Y2 (de) | 1979-11-08 | 1979-11-08 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH019948Y2 (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5251538U (de) * | 1975-10-09 | 1977-04-13 | ||
JPS53142230A (en) * | 1977-05-18 | 1978-12-11 | Dainippon Printing Co Ltd | Transmission type screen |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52124748U (de) * | 1976-03-18 | 1977-09-22 |
-
1979
- 1979-11-08 JP JP1979155263U patent/JPH019948Y2/ja not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5251538U (de) * | 1975-10-09 | 1977-04-13 | ||
JPS53142230A (en) * | 1977-05-18 | 1978-12-11 | Dainippon Printing Co Ltd | Transmission type screen |
Also Published As
Publication number | Publication date |
---|---|
JPS5674430U (de) | 1981-06-18 |
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