JPH051924B2 - - Google Patents
Info
- Publication number
- JPH051924B2 JPH051924B2 JP59218114A JP21811484A JPH051924B2 JP H051924 B2 JPH051924 B2 JP H051924B2 JP 59218114 A JP59218114 A JP 59218114A JP 21811484 A JP21811484 A JP 21811484A JP H051924 B2 JPH051924 B2 JP H051924B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- fresnel lens
- screen
- flat
- flat portion
- 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 - Lifetime
Links
- 238000011282 treatment Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000000149 argon plasma sintering Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 description 5
- 229920000178 Acrylic resin Polymers 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- -1 CaCO 3 Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59218114A JPS6197602A (ja) | 1984-10-17 | 1984-10-17 | スクリ−ン用フレネルレンズ |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59218114A JPS6197602A (ja) | 1984-10-17 | 1984-10-17 | スクリ−ン用フレネルレンズ |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6197602A JPS6197602A (ja) | 1986-05-16 |
| JPH051924B2 true JPH051924B2 (en, 2012) | 1993-01-11 |
Family
ID=16714844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59218114A Granted JPS6197602A (ja) | 1984-10-17 | 1984-10-17 | スクリ−ン用フレネルレンズ |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6197602A (en, 2012) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2732496B2 (ja) * | 1988-08-04 | 1998-03-30 | 大日本印刷株式会社 | 透過形スクリーン |
| JP2007535783A (ja) | 2003-12-22 | 2007-12-06 | ショット アクチエンゲゼルシャフト | 段付レンズを備える光学装置 |
| DE10361121A1 (de) * | 2003-12-22 | 2005-07-21 | Schott Ag | Optische Anordnung mit Stufenlinse |
| JP7275832B2 (ja) * | 2019-05-14 | 2023-05-18 | 大日本印刷株式会社 | 透過型スクリーン及び表示装置 |
-
1984
- 1984-10-17 JP JP59218114A patent/JPS6197602A/ja active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6197602A (ja) | 1986-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |