JPH02134529U - - Google Patents
Info
- Publication number
- JPH02134529U JPH02134529U JP1989043759U JP4375989U JPH02134529U JP H02134529 U JPH02134529 U JP H02134529U JP 1989043759 U JP1989043759 U JP 1989043759U JP 4375989 U JP4375989 U JP 4375989U JP H02134529 U JPH02134529 U JP H02134529U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- screen
- total reflection
- light
- 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
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000031700 light absorption Effects 0.000 claims description 2
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical compound Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-UHFFFAOYSA-N 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
Description
第１図および第２図は本考案の一実施例を示す
透過型スクリーンの一部分の断面図および１つの
レンチキユラーレンズの断面図、第３図は従来の
透過型スクリーンの一部分の断面図である。
１１……スクリーン背面、１２……レンチキユ
ラーレンズ、１２ａ，１２ｂ，１２ｃ……レンズ
単位、Ａ１，Ａ２……全反射面、Ｂ，Ｃ１，Ｃ２
，Ｄ１，Ｄ２……凸レンズ面、Ｅ１，Ｅ２……全
反射光出射面、１３……光吸収層。
1 and 2 are a cross-sectional view of a portion of a transmission screen and a lenticular lens showing an embodiment of the present invention, and FIG. 3 is a cross-section view of a portion of a conventional transmission screen. be. 11... Screen back surface, 12... Lenticular lens, 12a, 12b, 12c... Lens unit, A 1 , A 2 ... Total reflection surface, B, C 1 , C 2
, D 1 , D 2 ... Convex lens surface, E 1 , E 2 ... Total reflection light emission surface, 13 ... Light absorption layer.
Claims (1)
ら入射して前面側に出射する投影画像光を前記レ
ンチキユラーレンズにより拡散させる透過型スク
リーンにおいて、 前記レンチキユラーレンズを、その幅方向にお
いて複数のレンズ単位に分割し、この各レンズ単
位間にそれぞれ各レンズ単位の側面の基端から頂
部付近にわたつて光吸収層を設けるとともに、 前記各レンズ単位のうち少なくとも１つのレン
ズ単位は、その両側面をスクリーン背面からの入
射光を反射させる全反射面とし頂部に全反射光出
射面とレンズ面を形成するとともに、前記全反射
面をスクリーン面に対して垂直に入射してこの全
反射面で反射される光を前記全反射光出射面に向
けて集光させる曲面とした形状とし、 他のレンズ単位は、その両側面をスクリーン面
に対して垂直に近い角度で立上る直線面とし頂面
をレンズ面とした形状とし、 かつ、前記各レンズ単位の底幅を、 ｈ・ｔａｎ（ｓｉｎ−１１／ｎ） ｈ：レンズ単位の側面の基端から前記光吸収層
の頂縁までの高さ ｎ：スクリーン材質の光屈折率 より小さくしたことを特徴とする透過型スクリ
ーン。[Claims for Utility Model Registration] A transmissive screen having a lenticular lens on the front side and diffusing projected image light incident from the back side and emitted to the front side by the lenticular lens, comprising: The lens is divided into a plurality of lens units in the width direction, and a light absorption layer is provided between each of the lens units from the base end to the vicinity of the top of the side surface of each lens unit, and at least one of the lens units is provided. One lens unit has both sides thereof as total reflection surfaces that reflect incident light from the back of the screen, and the top thereof as a total reflection light output surface and a lens surface, and the total reflection surfaces are perpendicular to the screen surface. The shape is a curved surface that condenses the incident light reflected by the total reflection surface toward the total reflection light output surface, and the other lens units have both sides at an angle close to perpendicular to the screen surface. The shape is such that the top surface is a lens surface, and the bottom width of each lens unit is h・tan (sin −1 1/n) h: The light is emitted from the base end of the side surface of the lens unit. A transmission screen characterized in that the height to the top edge of the absorption layer is smaller than n: the optical refractive index of the screen material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989043759U JP2501664Y2 (en) | 1989-04-14 | 1989-04-14 | Transparent screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989043759U JP2501664Y2 (en) | 1989-04-14 | 1989-04-14 | Transparent screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02134529U true JPH02134529U (en) | 1990-11-08 |
| JP2501664Y2 JP2501664Y2 (en) | 1996-06-19 |
Family
ID=31556446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989043759U Expired - Lifetime JP2501664Y2 (en) | 1989-04-14 | 1989-04-14 | Transparent screen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2501664Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200056996A1 (en) * | 2018-08-17 | 2020-02-20 | Massachusetts Institute Of Technology | Articles and methods for generation of tunable coloration and interference |
-
1989
- 1989-04-14 JP JP1989043759U patent/JP2501664Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200056996A1 (en) * | 2018-08-17 | 2020-02-20 | Massachusetts Institute Of Technology | Articles and methods for generation of tunable coloration and interference |
| US11953439B2 (en) * | 2018-08-17 | 2024-04-09 | Massachusetts Institute Of Technology | Articles and methods for generation of tunable coloration and interference |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2501664Y2 (en) | 1996-06-19 |
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