JPS63153247U - - Google Patents
Info
- Publication number
- JPS63153247U JPS63153247U JP1987046180U JP4618087U JPS63153247U JP S63153247 U JPS63153247 U JP S63153247U JP 1987046180 U JP1987046180 U JP 1987046180U JP 4618087 U JP4618087 U JP 4618087U JP S63153247 U JPS63153247 U JP S63153247U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- total reflection
- sides
- screen
- lens unit
- 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
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process 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斜視図および１
つのレンズ単位の光拡散状態図である。
１…スクリーン本体、２…レンチキユラーレン
ズ、３…レンズ単位、４…レンズ部、４ｂ…直線
面、４ｃ…非球面レンズ面、４ｄ…凸レンズ面、
５…全反射面、５ａ…立上り面。
1 and 2 are perspective views of a portion of a rear projection screen showing one embodiment of this invention, and FIG.
FIG. 2 is a diagram showing a state of light diffusion in each lens unit. DESCRIPTION OF SYMBOLS 1... Screen body, 2... Lenticular lens, 3... Lens unit, 4... Lens part, 4b... Linear surface, 4c... Aspherical lens surface, 4d... Convex lens surface,
5... Total reflection surface, 5a... Rising 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、頂部をレンズ部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
レンズを形成してなり、かつ前記レンチキユラー
レンズの各レンズ単位のレンズ部は、その中央部
と外側縁部との間に非球面レンズ面を形成し外側
縁部には凸レンズ面を形成するとともに中央部に
このレンズ単位の両側の全反射面とそれぞれ対向
する直線面を形成した形状とし、さらに前記各レ
ンズ単位の両側の全反射面を、スクリーン背面側
から入射光を前記直線面に向けて反射集光させる
彎曲面とするとともに、この全反射面の上端側に
、この全反射面よりも急角度で立上る立上り面を
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 has a lenticular lens in which a number of continuous lens units each having a lens portion at the top and total reflection surfaces at both sides are arranged. The lens portion of each lens unit of the lenticular lens has an aspherical lens surface formed between its center and an outer edge, a convex lens surface on the outer edge, and a center The total reflection surfaces on both sides of each lens unit have a shape in which a linear surface is formed opposite each other, and the total reflection surfaces on both sides of each lens unit reflect incident light from the back side of the screen toward the straight surfaces. A rear projection screen characterized in that it has a curved surface that condenses light, and a rising surface that rises at a steeper angle than the total reflection surface is formed on the upper end side of the total reflection surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046180U JPH0414743Y2 (en) | 1987-03-28 | 1987-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046180U JPH0414743Y2 (en) | 1987-03-28 | 1987-03-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63153247U true JPS63153247U (en) | 1988-10-07 |
| JPH0414743Y2 JPH0414743Y2 (en) | 1992-04-02 |
Family
ID=30865604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987046180U Expired JPH0414743Y2 (en) | 1987-03-28 | 1987-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0414743Y2 (en) |
-
1987
- 1987-03-28 JP JP1987046180U patent/JPH0414743Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0414743Y2 (en) | 1992-04-02 |