JPH02134527U - - Google Patents
Info
- Publication number
- JPH02134527U JPH02134527U JP1989042874U JP4287489U JPH02134527U JP H02134527 U JPH02134527 U JP H02134527U JP 1989042874 U JP1989042874 U JP 1989042874U JP 4287489 U JP4287489 U JP 4287489U JP H02134527 U JPH02134527 U JP H02134527U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lens surfaces
- concentric
- fresnel lens
- 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.)
- Pending
Links
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000000149 argon plasma sintering Methods 0.000 claims description 2
Landscapes
- Transforming Electric Information Into Light Information (AREA)
- Overhead Projectors And Projection Screens (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989042874U JPH02134527U (es) | 1989-04-12 | 1989-04-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989042874U JPH02134527U (es) | 1989-04-12 | 1989-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02134527U true JPH02134527U (es) | 1990-11-08 |
Family
ID=31554798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989042874U Pending JPH02134527U (es) | 1989-04-12 | 1989-04-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02134527U (es) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027399A1 (fr) * | 2000-09-29 | 2002-04-04 | Mitsubishi Denki Kabushiki Kaisha | Lentille de fresnel, ecran, dispositif d'affichage d'image, procede de fabrication de moules pour lentilles et procede de fabrication de lentilles |
| WO2003040824A1 (fr) * | 2001-11-09 | 2003-05-15 | Mitsubishi Denki Kabushiki Kaisha | Systeme d'affichage d'images |
-
1989
- 1989-04-12 JP JP1989042874U patent/JPH02134527U/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027399A1 (fr) * | 2000-09-29 | 2002-04-04 | Mitsubishi Denki Kabushiki Kaisha | Lentille de fresnel, ecran, dispositif d'affichage d'image, procede de fabrication de moules pour lentilles et procede de fabrication de lentilles |
| US6726859B2 (en) | 2000-09-29 | 2004-04-27 | Mitsubishi Denki Kabushiki Kaisha | Fresnel lens, screen, image display device, lens mold manufacturing method and lens manufacturing method |
| US7116476B2 (en) | 2000-09-29 | 2006-10-03 | Mitsubishi Denki Kabushiki Kaisha | Fresnel lens, screen, image displaying device, lens forming mold manufacturing method and lens manufacturing method |
| WO2003040824A1 (fr) * | 2001-11-09 | 2003-05-15 | Mitsubishi Denki Kabushiki Kaisha | Systeme d'affichage d'images |