JPS63125802U - - Google Patents
Info
- Publication number
- JPS63125802U JPS63125802U JP1741987U JP1741987U JPS63125802U JP S63125802 U JPS63125802 U JP S63125802U JP 1741987 U JP1741987 U JP 1741987U JP 1741987 U JP1741987 U JP 1741987U JP S63125802 U JPS63125802 U JP S63125802U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- step surface
- fresnel lens
- light
- view
- 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
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 1
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987017419U JPH0637362Y2 (ja) | 1987-02-09 | 1987-02-09 | 液晶プロジェクタ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987017419U JPH0637362Y2 (ja) | 1987-02-09 | 1987-02-09 | 液晶プロジェクタ |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63125802U true JPS63125802U (fr) | 1988-08-17 |
JPH0637362Y2 JPH0637362Y2 (ja) | 1994-09-28 |
Family
ID=30810163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987017419U Expired - Lifetime JPH0637362Y2 (ja) | 1987-02-09 | 1987-02-09 | 液晶プロジェクタ |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0637362Y2 (fr) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3784282A (en) * | 1971-03-05 | 1974-01-08 | Hitachi Ltd | Correcting lens used to form fluorescent screens of colour television receiving tubes |
JPS4922770A (fr) * | 1972-06-22 | 1974-02-28 | ||
JPS52143847A (en) * | 1976-05-26 | 1977-11-30 | Mitsubishi Electric Corp | Optical lens |
JPS5336250A (en) * | 1976-09-16 | 1978-04-04 | Toshiba Corp | Fresnel lens |
JPS5818201U (ja) * | 1981-07-29 | 1983-02-04 | 日本電気ホームエレクトロニクス株式会社 | フレネルレンズ |
-
1987
- 1987-02-09 JP JP1987017419U patent/JPH0637362Y2/ja not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3784282A (en) * | 1971-03-05 | 1974-01-08 | Hitachi Ltd | Correcting lens used to form fluorescent screens of colour television receiving tubes |
JPS4922770A (fr) * | 1972-06-22 | 1974-02-28 | ||
JPS52143847A (en) * | 1976-05-26 | 1977-11-30 | Mitsubishi Electric Corp | Optical lens |
JPS5336250A (en) * | 1976-09-16 | 1978-04-04 | Toshiba Corp | Fresnel lens |
JPS5818201U (ja) * | 1981-07-29 | 1983-02-04 | 日本電気ホームエレクトロニクス株式会社 | フレネルレンズ |
Also Published As
Publication number | Publication date |
---|---|
JPH0637362Y2 (ja) | 1994-09-28 |