JPS63153248U - - Google Patents
Info
- Publication number
- JPS63153248U JPS63153248U JP1987046181U JP4618187U JPS63153248U JP S63153248 U JPS63153248 U JP S63153248U JP 1987046181 U JP1987046181 U JP 1987046181U JP 4618187 U JP4618187 U JP 4618187U JP S63153248 U JPS63153248 U JP S63153248U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- outer edge
- total reflection
- screen
- sides
- 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
- 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、４ｂ…非球面レンズ面、４ｄ…凸レンズ面、
４ｅ…平坦面、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. 3 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... Straight line surface, 4b... Aspherical lens surface, 4d... Convex lens surface,
4e...Flat 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およびこの凸レンズ面から外
側縁側にほぼ水平に延長された平坦面を形成する
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、ほぼ垂直に立上る立上り面を
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 between its center and an outer edge, and a convex lens surface on the outer edge and a convex lens surface formed on the outer edge. A flat surface extending almost horizontally on the outer edge side is formed, and a linear surface is formed in the center to face the total reflection surfaces on both sides of this lens unit, and furthermore, total reflection surfaces on both sides of each lens unit are formed. of,
A rear projection screen characterized in that the screen has a curved surface that reflects and condenses incident light from the rear side of the screen toward the linear surface, and a rising surface that rises almost perpendicularly is formed on the upper end side of this total reflection surface. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046181U JPS63153248U (en) | 1987-03-28 | 1987-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046181U JPS63153248U (en) | 1987-03-28 | 1987-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63153248U true JPS63153248U (en) | 1988-10-07 |
Family
ID=30865606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987046181U Pending JPS63153248U (en) | 1987-03-28 | 1987-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63153248U (en) |
-
1987
- 1987-03-28 JP JP1987046181U patent/JPS63153248U/ja active Pending