JPH0197328U - - Google Patents
Info
- Publication number
- JPH0197328U JPH0197328U JP1987193471U JP19347187U JPH0197328U JP H0197328 U JPH0197328 U JP H0197328U JP 1987193471 U JP1987193471 U JP 1987193471U JP 19347187 U JP19347187 U JP 19347187U JP H0197328 U JPH0197328 U JP H0197328U
- Authority
- JP
- Japan
- Prior art keywords
- screen
- lens
- total reflection
- back side
- angle
- 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
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第１図および第２図はこの考案の一実施例を示
す背面投影スクリーンの一部分の断面図および１
つのレンズ単位の光透過図、第３図は背面投影ス
クリーンを使用する投影装置の原理図、第４図は
従来の背面投影スクリーンの一部分の断面図であ
る。
１１…スクリーン本体、１２…レンチキユラー
レンズ、１３…レンズ単位、１４…レンズ面、１
５…全反射面、１６…垂直溝、１６ａ…光屈折面
。
1 and 2 are a cross-sectional view of a part of a rear projection screen showing an embodiment of this invention, and FIG.
3 is a principle diagram of a projection apparatus using a rear projection screen, and FIG. 4 is a sectional view of a portion of a conventional rear projection screen. DESCRIPTION OF SYMBOLS 11... Screen body, 12... Lenticular lens, 13... Lens unit, 14... Lens surface, 1
5... Total reflection surface, 16... Vertical groove, 16a... Light refraction surface.
Claims (1)
させる背面投影スクリーンであつて、スクリーン
表面に、頂部をレンズ面とし両側面を全反射面と
した多数のレンズ単位が連続するレンチキユラー
レンズを形成し、かつスクリーン背面側に、前記
レンチキユラーレンズの各レンズ単位の全反射面
のうちスクリーン背面側からスクリーン背面に対
して垂直に入射する平行光を前記レンズ面に対し
て全反射角またはそれに近い角度で反射させる領
域に対向させて、この領域に向かつて入射する光
を前記レンズ面に向けてこのレンズ面を透過する
角度に屈折させる光屈折部を形成したことを特徴
とする背面投影スクリーン。 It is a rear projection screen that allows the optical image projected from the back side to be observed from the front side, and the screen surface is equipped with a lenticular lens in which a large number of continuous lens units each having a lens surface at the top and total reflection surfaces at both sides are arranged. and on the back side of the screen, parallel light incident perpendicularly to the back surface of the screen from the back side of the screen among the total reflection surfaces of each lens unit of the lenticular lens is set at a total reflection angle or Rear projection characterized in that a light refracting section is formed to face the area to be reflected at an angle close to that, and to refract the light incident on the area toward the lens surface at an angle at which the light is transmitted through the lens surface. screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987193471U JPH0455315Y2 (en) | 1987-12-22 | 1987-12-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987193471U JPH0455315Y2 (en) | 1987-12-22 | 1987-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0197328U true JPH0197328U (en) | 1989-06-28 |
| JPH0455315Y2 JPH0455315Y2 (en) | 1992-12-25 |
Family
ID=31484258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987193471U Expired JPH0455315Y2 (en) | 1987-12-22 | 1987-12-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0455315Y2 (en) |
-
1987
- 1987-12-22 JP JP1987193471U patent/JPH0455315Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0455315Y2 (en) | 1992-12-25 |