JPS6423040U - - Google Patents
Info
- Publication number
- JPS6423040U JPS6423040U JP11506587U JP11506587U JPS6423040U JP S6423040 U JPS6423040 U JP S6423040U JP 11506587 U JP11506587 U JP 11506587U JP 11506587 U JP11506587 U JP 11506587U JP S6423040 U JPS6423040 U JP S6423040U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- fresnel lens
- temperature
- overhead projector
- heated
- 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
- 230000003287 optical effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第１図は、本考案の一実施例の構成図、第２図
は、本考案の他の実施例の構成図、第３図は、従
来例の構成図である。
１……サーモクロミツクフイルム、３……プラ
テン兼送りローラ、４……サーマルヘツド、５…
…消去ヒータ、６……投影用ランプ、７……フレ
ネルレンズ、１１，１７……反射鏡、１３……ダ
イクロイツクミラー、１４……防熱フイルタ、１
５……フアン、１８……遮蔽板。
FIG. 1 is a block diagram of one embodiment of the present invention, FIG. 2 is a block diagram of another embodiment of the present invention, and FIG. 3 is a block diagram of a conventional example. 1...Thermochromic film, 3...Platen and feed roller, 4...Thermal head, 5...
... Erasing heater, 6 ... Projection lamp, 7 ... Fresnel lens, 11, 17 ... Reflector, 13 ... Dichroic mirror, 14 ... Heat protection filter, 1
5... Juan, 18... Shielding plate.
Claims (1)
学的に透明となり、予め定められた第２の温度で
加熱すると光学的に不透明となるサーモクロミツ
クフイルムに、原稿画像の読取信号に対応して前
記第２の温度を選択的に印加し画像を形成したも
のを投影用フイルムとするオーバーヘツドプロジ
エクタにおいて、投影用の光源を、エンドレス状
に張設したサーモクロミツクフイルムのループ外
に配置するとともに、その光源とフレネルレンズ
との間に光路を変えるための反射鏡を少なくとも
１つ配置したことを特徴とするオーバーヘツドプ
ロジエクタ。 (2) 前記光源とフレネルレンズとの間に光路を
変えるための反射鏡を２つ以上備えるとともに、
前記光源からの光が直接前記フレネルレンズに入
射しないように遮蔽板を設けたことを特徴とする
実用新案登録請求の範囲第(1)項記載のオーバー
ヘツドプロジエクタ。[Claims for Utility Model Registration] (1) A thermochromic film that becomes optically transparent when heated at a predetermined first temperature and becomes optically opaque when heated at a predetermined second temperature. , in an overhead projector whose projection film is formed by selectively applying the second temperature in response to a reading signal of an original image, a light source for projection is stretched in an endless manner. An overhead projector characterized in that at least one reflecting mirror is arranged outside the loop of the thermochromic film and between the light source and the Fresnel lens for changing the optical path. (2) Two or more reflecting mirrors for changing the optical path are provided between the light source and the Fresnel lens, and
The overhead projector according to claim 1, which is a registered utility model, further comprising a shielding plate so that light from the light source does not directly enter the Fresnel lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11506587U JPS6423040U (en) | 1987-07-29 | 1987-07-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11506587U JPS6423040U (en) | 1987-07-29 | 1987-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6423040U true JPS6423040U (en) | 1989-02-07 |
Family
ID=31356380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11506587U Pending JPS6423040U (en) | 1987-07-29 | 1987-07-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6423040U (en) |
-
1987
- 1987-07-29 JP JP11506587U patent/JPS6423040U/ja active Pending
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