JPS5990836A - Transmission type screen - Google Patents
Transmission type screenInfo
- Publication number
- JPS5990836A JPS5990836A JP20252082A JP20252082A JPS5990836A JP S5990836 A JPS5990836 A JP S5990836A JP 20252082 A JP20252082 A JP 20252082A JP 20252082 A JP20252082 A JP 20252082A JP S5990836 A JPS5990836 A JP S5990836A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- light
- fresnel lens
- film
- fresnel
- 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
- 230000005540 biological transmission Effects 0.000 title claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/62—Translucent screens
- G03B21/625—Lenticular translucent screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
【発明の詳細な説明】 この発明は透過形スクリーンに関するものである。[Detailed description of the invention] This invention relates to a transmission screen.
従来の透過形スクリーンとして、第１図に示すものが知
られている。すなわち、フレネルレンズ（２）のレンズ
面を内側（光線り側）に向け、その前面に、かまｔまこ
状の凹凸ストライプ（３ａ）とブラックヌトフイブ（３
ｂ）とを有するレンチキュラーレンズ（１）ヲ、ソのレ
ンズ面がフレネルレンズ（２）側に向くように配置１ｔ
シたものである。このようなものでは、フレネルレンズ
（２）のレンズ面トレンチキュヲーレンズ（１）の凹凸
ストライプ（３０）との間に充分な距離が存在するため
、光の干渉が起こりにくく、モアレを生じにくいが、そ
の反面、第２図に示すように、フレネルレンズ（２）の
レンズ面の切込み面（５）が非レンズ面となって、入射
光（４）の一部分（第２図中斜線で示す）が集光されな
いため、周辺部分において光量が不足する。そのため、
実際の画面では周辺が暗い画像になってし寸うという欠
点がある。As a conventional transmission type screen, one shown in FIG. 1 is known. That is, the lens surface of the Fresnel lens (2) faces inward (light beam side), and the front surface of the Fresnel lens (2) is provided with a semicircular stripe (3a) and a black nut fiber (3).
A lenticular lens (1) having b) is arranged so that the lens surfaces of the lens face the Fresnel lens (2).
It's something new. In this type of lens, there is a sufficient distance between the lens surface trench cuo of the Fresnel lens (2) and the uneven stripe (30) of the lens (1), so light interference is less likely to occur and moiré is less likely to occur. On the other hand, as shown in Fig. 2, the notched surface (5) of the lens surface of the Fresnel lens (2) becomes a non-lens surface, and a portion of the incident light (4) (shown with diagonal lines in Fig. 2) becomes a non-lens surface. ) is not focused, so the amount of light is insufficient in the peripheral areas. Therefore,
On an actual screen, the disadvantage is that the image tends to be dark around the edges.
これを数倍する方法として、第３図に示すようニ、フレ
ネルレンズ（２）のレンズ面をレンチキュラーレンズ（
１）側に向けることが考えられる。しかし、このように
したのでは、フレネルレンズ（２）のレンズ面とレンチ
キュラーレンズ（１）の凹凸ストライプ（３ε）との距
離が短かく、光の干渉が起こり、モアレを生じる不具合
がある。As a method of multiplying this by several times, as shown in Figure 3, the lens surface of the Fresnel lens (2) is transformed into a lenticular lens (
1) It is possible to turn it to the side. However, in this case, the distance between the lens surface of the Fresnel lens (2) and the concavo-convex stripe (3ε) of the lenticular lens (1) is short, causing light interference and causing moiré.
この発明は上記のような問題点を解消するだめになされ
たもので、光の干渉によるモアレの発生がなく、シかも
周囲に光量不足の生じない透過形スクリーンを提供する
ことを目的としている。This invention was made to solve the above-mentioned problems, and an object of the present invention is to provide a transmissive screen that does not cause moiré due to light interference and does not cause insufficient light in the surrounding area.
第４図はこの発明の実施例を示している。フレネルレン
ズ（２）とレンチキュツーレンズ（１）とをそれぞれの
レンズ面が対向するように配置する点は第３図と同じで
あるが、２つのレンズ（１） 、 （２）の間隙に光拡
散能力の高いフィルム（７）を介在させである。FIG. 4 shows an embodiment of the invention. The Fresnel lens (2) and the lenticule lens (1) are arranged so that their respective lens surfaces face each other, as in Figure 3, but in the gap between the two lenses (1) and (2). A film (7) with high light diffusion ability is interposed.
したがって、フレネルレンズ（２）を透過した光はこの
フィルム（７）によって充分に拡散されるため、レンチ
キュツーレンズ（１）の凹凸ストライプ（３ａ）、！：
ｔｄ干渉を起こしにくくなシ、モアレの発生が抑制され
る。まだ、フレネルレンズ（２）のレンズ面は光線りに
対して外（Ｉｌｌを向いているため、周辺部における光
量不足も解消される。Therefore, since the light transmitted through the Fresnel lens (2) is sufficiently diffused by this film (7), the uneven stripes (3a) of the lenticule lens (1), ! :
The occurrence of moiré, which is less likely to cause td interference, is suppressed. Still, since the lens surface of the Fresnel lens (2) faces outward (Ill) with respect to the light beam, the insufficient amount of light in the peripheral area is also eliminated.
以上述べたように、この発明によればフレネルレンズと
レンチキュツーレンズとをそれぞれのレンズ面が対向す
るように配置し、両レンズ間に光拡散能力の高いフィル
ムを介在させたので、光の干渉にもとづくモアレの発生
がなく、かつ周辺部での光量不足の生じない透過形スク
リーンを提供することができる。As described above, according to the present invention, the Fresnel lens and the lenticule lens are arranged so that their respective lens surfaces face each other, and a film with high light diffusion ability is interposed between both lenses. It is possible to provide a transmission screen that does not cause moiré due to interference and does not cause insufficient light in the peripheral area.
第１図は従来の透過形スクリーンにおけるレンズの配置
を示す図、第２図は第１図の部分拡大図、第３図は従来
の他のレンズ配置例を示す図、第４図はこの発明の実施
例におけるレンズの配置図である。
（１）・・・レンチキュツーレンズ、（２）・・・フレ
ネルレンズ、（７）・・・フィルム。
なお、図中同一符号は同一またはイ目当部分を示す。
代理人 弁理士 葛 野 信 −（外１名）笥１ 図
第３図
第２閏
第４１７！
絽−Fig. 1 is a diagram showing the arrangement of lenses in a conventional transmission type screen, Fig. 2 is a partially enlarged view of Fig. 1, Fig. 3 is a diagram showing another example of conventional lens arrangement, and Fig. 4 is a diagram of the invention. FIG. 3 is a layout diagram of lenses in an example. (1)...lenticule lens, (2)...Fresnel lens, (7)...film. Note that the same reference numerals in the figures indicate the same or A target parts. Agent Patent Attorney Shin Kuzuno - (1 other person) 1 Figure Figure 3 Figure 2 Leap No. 417! silk
Claims (1)
それぞれのレンズ面が対向するように配置し、上記１ｉ
１ｉｉレンズ間に光拡散能力の高いフィルムを介在させ
たことを特徴とする透過形スクリーン。(1) Arrange the Fresnel lens and lenticular lens so that their respective lens surfaces face each other, and
1. A transmission screen characterized by interposing a film with high light diffusion ability between lenses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20252082A JPS5990836A (en) | 1982-11-16 | 1982-11-16 | Transmission type screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20252082A JPS5990836A (en) | 1982-11-16 | 1982-11-16 | Transmission type screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5990836A true JPS5990836A (en) | 1984-05-25 |
Family
ID=16458847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20252082A Pending JPS5990836A (en) | 1982-11-16 | 1982-11-16 | Transmission type screen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5990836A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59109333U (en) * | 1983-01-14 | 1984-07-23 | 大日本印刷株式会社 | rear screen |
| JPS60263932A (en) * | 1984-06-13 | 1985-12-27 | Hitachi Ltd | image projection device |
| JPH01177023A (en) * | 1987-12-29 | 1989-07-13 | Dainippon Printing Co Ltd | Transmitting screen |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56140335A (en) * | 1980-04-04 | 1981-11-02 | Matsushita Electric Ind Co Ltd | Transmission type projecting screen |
-
1982
- 1982-11-16 JP JP20252082A patent/JPS5990836A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56140335A (en) * | 1980-04-04 | 1981-11-02 | Matsushita Electric Ind Co Ltd | Transmission type projecting screen |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59109333U (en) * | 1983-01-14 | 1984-07-23 | 大日本印刷株式会社 | rear screen |
| JPS60263932A (en) * | 1984-06-13 | 1985-12-27 | Hitachi Ltd | image projection device |
| JPH01177023A (en) * | 1987-12-29 | 1989-07-13 | Dainippon Printing Co Ltd | Transmitting screen |
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