JPS6246445U - - Google Patents
Info
- Publication number
- JPS6246445U JPS6246445U JP1985137554U JP13755485U JPS6246445U JP S6246445 U JPS6246445 U JP S6246445U JP 1985137554 U JP1985137554 U JP 1985137554U JP 13755485 U JP13755485 U JP 13755485U JP S6246445 U JPS6246445 U JP S6246445U
- Authority
- JP
- Japan
- Prior art keywords
- fresnel lens
- lens sheet
- schematic diagram
- diagram showing
- convex
- 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
- 238000010586 diagram Methods 0.000 description 8
- 230000004907 flux Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第１図ａは本考案のフレネルレンズシートを利
用したスクリーンを示す概略図であり、第１図ｂ
は本考案のフレネルレンズシートと同等の効果を
もつ凸メニスクレンズを示す概略図である。第２
図は本考案のフレネルレンズシートに入射する光
束の損失を示した概略図である。第３図はフレネ
ルレンズシートに入射する光束の入射角を示した
概略図である。第４図は本考案の他の実施例を示
す概略図である。第５図、第６図はそれぞれ従来
のフレネルレンズシートを利用したスクリーンの
概略図と、それらフレネルレンズシートと同等の
効果をもつ平凸レンズの概略図を示したものであ
る。第７図は従来のフレネルレンズシートに入射
する光束の損失を示した概略図である。
３０…フレネルレンズシート、５…拡散板、４
…光源。
Fig. 1a is a schematic diagram showing a screen using the Fresnel lens sheet of the present invention, and Fig. 1b
is a schematic diagram showing a convex meniscus lens having the same effect as the Fresnel lens sheet of the present invention. Second
The figure is a schematic diagram showing the loss of light flux incident on the Fresnel lens sheet of the present invention. FIG. 3 is a schematic diagram showing the angle of incidence of the light beam incident on the Fresnel lens sheet. FIG. 4 is a schematic diagram showing another embodiment of the present invention. 5 and 6 respectively show a schematic diagram of a screen using a conventional Fresnel lens sheet and a schematic diagram of a plano-convex lens having the same effect as those Fresnel lens sheets. FIG. 7 is a schematic diagram showing the loss of light flux incident on a conventional Fresnel lens sheet. 30...Fresnel lens sheet, 5...diffusion plate, 4
…light source.
Claims (1)
ズシートであつて、その少なくとも観察側の面に
はフレネルレンズが設けられ、しかも全体として
凸メニスクの性能を発揮するように構成されてお
り、このうちの凸メニスクにおける曲率の大きい
方の面を光源に向けて使用するようになつている
ことを特徴とするフレネルレンズシート。 A Fresnel lens sheet used in a rear projection screen is provided with a Fresnel lens on at least the viewing side, and is configured to exhibit the performance of a convex menisque as a whole. A Fresnel lens sheet characterized by being used with the surface with greater curvature facing the light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985137554U JPS6246445U (en) | 1985-09-10 | 1985-09-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985137554U JPS6246445U (en) | 1985-09-10 | 1985-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6246445U true JPS6246445U (en) | 1987-03-20 |
Family
ID=31041716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985137554U Pending JPS6246445U (en) | 1985-09-10 | 1985-09-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6246445U (en) |
-
1985
- 1985-09-10 JP JP1985137554U patent/JPS6246445U/ja active Pending