JPH02100246U - - Google Patents
Info
- Publication number
- JPH02100246U JPH02100246U JP784889U JP784889U JPH02100246U JP H02100246 U JPH02100246 U JP H02100246U JP 784889 U JP784889 U JP 784889U JP 784889 U JP784889 U JP 784889U JP H02100246 U JPH02100246 U JP H02100246U
- Authority
- JP
- Japan
- Prior art keywords
- screen
- overhead projector
- reflector
- onto
- occurs
- 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
- 238000010586 diagram Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第1図は、本考案の一実施例を示すための図で
あり、第2図は、従来の技術を示すための図であ
る。
1……光源、2……フレネルレンズ、3……原
版、4……投影レンズ、5……曲面反射鏡、6…
…平面反射鏡、7……スクリーン。
FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a conventional technique. 1... Light source, 2... Fresnel lens, 3... Original plate, 4... Projection lens, 5... Curved reflector, 6...
...Flat reflector, 7...Screen.
Claims (1)
状または板状の原版上に描かれた、文字および図
形をスクリーン上に投影する、オーバーヘツドプ
ロジエクタに於て、映像をスクリーンに投影する
ための反射鏡に、曲面反射鏡を使用する事により
、オーバーヘツドプロジエクターから、スクリー
ンの上端および下端までの距離が異なる場合に、
スクリーン上に投影された映像に発生する歪みを
除去した、オーバーヘツドプロジエクタ。 For projecting images onto a screen in an overhead projector that projects characters and figures drawn on a film-like or plate-like original made of a light-transmitting material onto a screen. By using a curved reflector for the reflector, when the distance from the overhead projector to the top and bottom of the screen is different,
An overhead projector that eliminates distortion that occurs in images projected on a screen.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP784889U JPH02100246U (en) | 1989-01-26 | 1989-01-26 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP784889U JPH02100246U (en) | 1989-01-26 | 1989-01-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02100246U true JPH02100246U (en) | 1990-08-09 |
Family
ID=31213211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP784889U Pending JPH02100246U (en) | 1989-01-26 | 1989-01-26 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02100246U (en) |
-
1989
- 1989-01-26 JP JP784889U patent/JPH02100246U/ja active Pending
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