JPH0436485U - - Google Patents
Info
- Publication number
- JPH0436485U JPH0436485U JP7725690U JP7725690U JPH0436485U JP H0436485 U JPH0436485 U JP H0436485U JP 7725690 U JP7725690 U JP 7725690U JP 7725690 U JP7725690 U JP 7725690U JP H0436485 U JPH0436485 U JP H0436485U
- Authority
- JP
- Japan
- Prior art keywords
- light
- fresnel lens
- infrared detection
- receiving unit
- reflected light
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Description
第１図はこの考案の赤外線検知装置の一実施例
を部分的に示す縦断面図、第２図は従来の赤外線
検知装置の取付け状態の一例を説明するための説
明図、第３図はその赤外線検知装置を示す縦断面
図、第４図は第３図の赤外線検知装置のフレネル
レンズ部分の一部を示す縦断面図である。
図面において、１は赤外線検知装置、２は自動
ドア、１２は受光ユニツト、１３はフレネルレン
ズ、１８は表示灯、１９は照明灯、２１は平滑な
面、２２は乱反射面である。
Fig. 1 is a vertical sectional view partially showing an embodiment of the infrared detection device of this invention, Fig. 2 is an explanatory diagram for explaining an example of the installation state of the conventional infrared detection device, and Fig. 3 is the same. FIG. 4 is a vertical cross-sectional view showing a part of the Fresnel lens portion of the infrared detecting device shown in FIG. 3. In the drawings, 1 is an infrared detection device, 2 is an automatic door, 12 is a light receiving unit, 13 is a Fresnel lens, 18 is an indicator light, 19 is an illumination light, 21 is a smooth surface, and 22 is a diffused reflection surface.
Claims (1)
し、その反射光をフレネルレンズを介して受光ユ
ニツトで受光して受光レベルの変化によりその領
域内に人等の障害物の存在を検出する赤外線検知
装置において、前記フレネルレンズは前記反射光
を前記受光ユニツトに透過するように調整された
平滑な第１の面と、迷光を透過する第２の面とで
構成される溝を複数有し、前記第２の面は前記迷
光を乱反射するように粗面になつていることを特
徴とする赤外線検知装置。 Infrared detection involves emitting infrared rays from a light emitting unit to a predetermined area, receiving the reflected light through a Fresnel lens at a receiving unit, and detecting the presence of obstacles such as people within the area based on changes in the level of received light. In the apparatus, the Fresnel lens has a plurality of grooves each having a smooth first surface adjusted to transmit the reflected light to the light receiving unit and a second surface transmitting stray light, An infrared detection device characterized in that the second surface is a rough surface so as to diffusely reflect the stray light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7725690U JPH0436485U (en) | 1990-07-20 | 1990-07-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7725690U JPH0436485U (en) | 1990-07-20 | 1990-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0436485U true JPH0436485U (en) | 1992-03-26 |
Family
ID=31619475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7725690U Pending JPH0436485U (en) | 1990-07-20 | 1990-07-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0436485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000329860A (en) * | 1999-05-20 | 2000-11-30 | Matsushita Electric Works Ltd | Infrared body detector |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61203347A (en) * | 1985-02-25 | 1986-09-09 | 稲村印刷株式会社 | Packaging vessel |
| JPS62134603A (en) * | 1985-12-06 | 1987-06-17 | Omron Tateisi Electronics Co | Photoelectric switch |
-
1990
- 1990-07-20 JP JP7725690U patent/JPH0436485U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61203347A (en) * | 1985-02-25 | 1986-09-09 | 稲村印刷株式会社 | Packaging vessel |
| JPS62134603A (en) * | 1985-12-06 | 1987-06-17 | Omron Tateisi Electronics Co | Photoelectric switch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000329860A (en) * | 1999-05-20 | 2000-11-30 | Matsushita Electric Works Ltd | Infrared body detector |
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