JPS63165640U - - Google Patents
Info
- Publication number
- JPS63165640U JPS63165640U JP5937887U JP5937887U JPS63165640U JP S63165640 U JPS63165640 U JP S63165640U JP 5937887 U JP5937887 U JP 5937887U JP 5937887 U JP5937887 U JP 5937887U JP S63165640 U JPS63165640 U JP S63165640U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- mirror
- fresnel mirror
- fresnel
- flat surface
- 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
- 230000003287 optical effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Optical Elements Other Than Lenses (AREA)
Description
第１図は本考案に係る反射式オーバーヘツドプ
ロジエクタの全体の構成を示す正面図、第２図は
本考案に係る反射式オーバーヘツドプロジエクタ
のフレネルミラーの一部拡大正面図、第３図は第
２図のフレネルミラーの原理図、第４図は従来の
反射式オーバーヘツドプロジエクタ全体の構成を
示す正面図、第５図は第４図のプロジエクタのフ
レネルミラーの一部拡大正面図、第６図は第５図
のフレネルミラーの原理図である。
３，３′……フレネルミラー、３ａ……表面、
３ｂ，３ｃ……鏡面。
FIG. 1 is a front view showing the overall configuration of a reflective overhead projector according to the present invention, FIG. 2 is a partially enlarged front view of a Fresnel mirror of the reflective overhead projector according to the present invention, and FIG. 3 is a principle diagram of the Fresnel mirror shown in Fig. 2, Fig. 4 is a front view showing the entire configuration of a conventional reflective overhead projector, and Fig. 5 is a partially enlarged front view of the Fresnel mirror of the projector shown in Fig. 4. FIG. 6 is a diagram showing the principle of the Fresnel mirror shown in FIG. 5. 3, 3'...Fresnel mirror, 3a...surface,
3b, 3c...mirror surface.
Claims (1)
投映光を反射させるフレネルミラーと、該フレネ
ルミラーの上方に配置されて前記反射された投映
光をスクリーンに投映させる投映レンズ及び反射
ミラーとからなる反射式オーバーヘツドプロジエ
クタにおいて、前記フレネルミラーの一方の面が
平面であつて、他方の面が前記平面と直交しない
光軸を有する鏡面であることを特徴とする反射式
オーバーヘツドプロジエクタ。 A light source, a Fresnel mirror disposed below the light source to reflect the projected light from the light source, and a projection lens and a reflecting mirror disposed above the Fresnel mirror to project the reflected projected light onto a screen. A reflective overhead projector characterized in that one surface of the Fresnel mirror is a flat surface, and the other surface is a mirror surface having an optical axis that is not perpendicular to the flat surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5937887U JPH0442831Y2 (en) | 1987-04-20 | 1987-04-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5937887U JPH0442831Y2 (en) | 1987-04-20 | 1987-04-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63165640U true JPS63165640U (en) | 1988-10-28 |
| JPH0442831Y2 JPH0442831Y2 (en) | 1992-10-09 |
Family
ID=30890814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5937887U Expired JPH0442831Y2 (en) | 1987-04-20 | 1987-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0442831Y2 (en) |
-
1987
- 1987-04-20 JP JP5937887U patent/JPH0442831Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0442831Y2 (en) | 1992-10-09 |
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