JPS5886469A - Reflective photosensor - Google Patents
Reflective photosensorInfo
- Publication number
- JPS5886469A JPS5886469A JP56185847A JP18584781A JPS5886469A JP S5886469 A JPS5886469 A JP S5886469A JP 56185847 A JP56185847 A JP 56185847A JP 18584781 A JP18584781 A JP 18584781A JP S5886469 A JPS5886469 A JP S5886469A
- Authority
- JP
- Japan
- Prior art keywords
- light
- reflector
- detected
- receiving element
- light emitting
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ホトセンサに関し、詳しくは、反射瓢ホトセ
ｙすの、改ＪＬＪＩＣ関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a photo sensor, and more particularly to a reflective gourd photo sensor, modified JLJIC.
無接触で、被検出物体の有無を検出する方法としてホト
センサが使用できる。ホトセンサは、発光素子として発
光ダイオード、受光素子としてホトダイオードｉたはホ
トトランジスタを持つ。この発光素子１受光素子を対向
させたものが、いわゆる透過臘ホトセンサで、発光素子
、受光素子間を被検出物体が通過することによる光量の
変化を受光素子が検出し、電気信号に変えて検出回路を
働かせるものである。A photo sensor can be used as a contactless method of detecting the presence or absence of an object to be detected. The photosensor has a light emitting diode as a light emitting element and a photodiode i or a phototransistor as a light receiving element. This light-emitting element and light-receiving element are placed facing each other in a so-called transmission photosensor, in which the light-receiving element detects changes in the amount of light caused by an object to be detected passing between the light-emitting element and the light-receiving element, and converts it into an electrical signal. It is what makes the circuit work.
しかしながら、被検出物体が、薄紙、ガラス。However, the object to be detected is thin paper or glass.
フィルム等のように透明の場合、光を通過させてしまう
ので、前述の透過型ホトセンサによる検出は不可能であ
る。それゆえ、薄紙、ガラス、フィルム等のように、被
検出物体が透明の場合には、発光素子、受光素子を同一
方向に併置して、発光素子からの光を被検出物体に反射
させて、その反射光を受光素子で検出する反射型ホトセ
ンサが使用されている。If it is transparent, such as a film, light will pass through it, so detection by the above-mentioned transmission type photosensor is impossible. Therefore, when the object to be detected is transparent, such as thin paper, glass, film, etc., a light emitting element and a light receiving element are placed side by side in the same direction, and the light from the light emitting element is reflected to the object to be detected. A reflective photosensor is used that detects the reflected light with a light receiving element.
従来の反射型ホトセンサを１図面において説明すると、
８Ｊ１図において、同一方向に併置された発光素子１と
受光素子２とが、ケース５により一体化されている。To explain a conventional reflective photosensor in one drawing,
In FIG. 8J1, a light emitting element 1 and a light receiving element 2 placed side by side in the same direction are integrated by a case 5.
このように構成され友従来の反射型ホトセンサでは、反
射型ホトセンサ前方に、被検出物体以外の反射体がある
と、その反射光を検出してしまい、被検出物体の有無に
かかわらず、検出している状態になることがある。図面
において説明すると、第１図は、従来の反射型ホトセン
サであり、発光素子１から出た光は被検出物体４にあた
り、そこで反射された光は受光素子２により検出される
。With a conventional reflective photo sensor configured in this way, if there is a reflector other than the object to be detected in front of the reflective photo sensor, the reflected light will be detected, regardless of the presence or absence of the object to be detected. You may find yourself in a state where you are Referring to the drawings, FIG. 1 shows a conventional reflective photosensor, in which light emitted from a light emitting element 1 hits an object to be detected 4, and the light reflected therefrom is detected by a light receiving element 2.
第２図は、被検出物体がないときであるが、発光素子１
．受光素子２の前方に被検出物体以外の反射体５がある
ために、被検出物体がないのにもかかわらず、発光素子
１がら出た光は、反射体５にあたり、そこで反射された
光は、受光素子２ｖｃよ６検出されてしまう、このため
に、被検出物体の有無を検出するのが不可能になるとい
う欠点があった。In Figure 2, there is no object to be detected, but the light emitting element 1
．． Since there is a reflector 5 other than the object to be detected in front of the light receiving element 2, the light emitted from the light emitting element 1 hits the reflector 5 even though there is no object to be detected, and the light reflected there , the light-receiving element 2vc is detected by 6, which has the disadvantage that it becomes impossible to detect the presence or absence of the object to be detected.
本発廟は、かかる欠点を除去したもので、その目的は、
反射層ホトセンサの発光素子、受光素子前方に、被検出
物体以外の反射体があっても、被検出物体の有無を検出
できる、検出能力の向上した反射層ホトセンサを得るこ
と咳ある。The main purpose of this temple is to eliminate these drawbacks, and its purpose is to
It is an object of the present invention to obtain a reflective layer photosensor with improved detection ability, which can detect the presence or absence of an object to be detected even if there is a reflector other than the object to be detected in front of a light emitting element and a light receiving element of the reflective layer photosensor.
本発明ｔｌＯ面を用いて説明する。The present invention will be explained using the tlO surface.
第５図Ｋｋいて、発光素子１１と受光素子１２０前方に
、ケース１３がら伸ばしたアーム１６を介して斜面であ
る反射体１８をつける。斜面である反射体１８は９１発
光素子１１がらの光を、Ａ方向に反射させるように、発
光素子１１．受光素子１２の光軸に対して角Ｉｎもった
斜面をもつ。このような斜面である反射体１８のときは
、真方向に、他の反射体がないとき反射光が受光素子に
入射しないため効果がある。As shown in FIG. 5, a reflector 18, which is a slope, is attached in front of the light emitting element 11 and the light receiving element 120 via an arm 16 extending from the case 13. The reflector 18, which is a slope, is arranged so that the light from the light emitting elements 11 91 is reflected in the A direction. It has a slope with an angle In to the optical axis of the light receiving element 12. When the reflector 18 is such a slope, it is effective because the reflected light does not enter the light receiving element when there is no other reflector in the true direction.
第６図は、ｗ４３図の実施例の横断面図で、発光素子１
１からでた光は、被検出物体がないとき矢印の方向に行
き、光軸に対してαなる角度をもつ斜面である反射体１
１Ｃあたり、Ａの方向に反射され、受光素子の方向に反
射されることはない。FIG. 6 is a cross-sectional view of the embodiment shown in FIG.
When there is no object to be detected, the light emitted from the reflector 1 goes in the direction of the arrow, and the light emitted from the reflector 1 is a slope with an angle α to the optical axis.
1C, it is reflected in the direction of A and is not reflected in the direction of the light receiving element.
このほか、斜面の傾きを賢えて発光素子１１からの光を
人の反対のＢ方向に反射させるように、発光素子１１．
受光素子１２０光軸に対して角度をもった斜面である反
射体でもよい。このような斜面である反射体のときは、
Ｂ方向に他の反射体がないとき反射光が受光素子に入射
しないため効果がある。In addition, the light emitting element 11.
It may be a reflector that is a slope with an angle to the optical axis of the light receiving element 120. When the reflector is a slope like this,
This is effective because the reflected light does not enter the light receiving element when there is no other reflector in the B direction.
第４図は、斜面である反射体の他の実施例を示すもので
、発光素子１１からの光をＡ、Ｂ両方向に反射させるよ
うに、発光素子１１．受光素子１２０光軸に対して角度
をもつ山型の斜面である反射体２１１！−、発光素子１
１．受光素子１２の前方に、ケース２ｓから伸ばした了
−ム２６を介してつけたものである。このような斜面で
ある反射体２８Ｄときは、ム、Ｂ両方向に他の反射体が
ないとき反射光が受光素子に入射しないため効果がある
。FIG. 4 shows another embodiment of the reflector which is a slope, and the light emitting element 11. The reflector 211 is a mountain-shaped slope with an angle to the optical axis of the light receiving element 120! -, light emitting element 1
1. It is attached to the front of the light receiving element 12 via a frame 26 extending from the case 2s. When the reflector 28D is such a slope, it is effective because the reflected light does not enter the light receiving element when there are no other reflectors in both the M and B directions.
第７図は、第４図の実施例の横断面図で、発光素子１１
からでた光は、被検出物体がないとき矢印の方向Ｋｖ％
き、光軸に対してαなる角度をもつ斜面である反射体２
８にあたり、Ａ、Ｂ両方向に反射され、受光素子の方向
に反射されることはない。FIG. 7 is a cross-sectional view of the embodiment shown in FIG.
When there is no object to be detected, the light emitted from the
The reflector 2 is a slope with an angle α to the optical axis.
8, it is reflected in both directions A and B, and is not reflected in the direction of the light receiving element.
第５図は、斜面である反射体の他の実施例を示すもので
、発光素子１１からの光ｔｂａ方向に反射させるように
、発光素子１１．受光素子１２の光軸に対して角Ｊ［を
もつ斜面である反射体５８を、発光素子１１．受光素子
１２の前方に、ケースｓ３から伸ばしたアーム５６を介
してつけたものである。このような斜面である反射体３
Ｂのとき′ は、Ｃ方向に他の反射体がないとき反射光
が受光素子に入射しない沈め効果がある。FIG. 5 shows another embodiment of the reflector which is a slope, and the light emitting element 11. The reflector 58, which is a slope having an angle J with respect to the optical axis of the light receiving element 12, is connected to the light emitting element 11. It is attached to the front of the light receiving element 12 via an arm 56 extending from the case s3. Reflector 3 with such a slope
In the case of B, there is a sinking effect that the reflected light does not enter the light receiving element when there is no other reflector in the C direction.
第８図は、１４５図の実施例の縦断面図で、発光素子１
１から出た光は、被検出物体が゛ないとき矢印の方向に
いき、光軸に対してαなる角度をもつ斜面である反射体
３８にあたり、Ｃの方向に反射され、受光素子１２の方
向に反射されることはない。FIG. 8 is a longitudinal cross-sectional view of the embodiment shown in FIG.
When there is no object to be detected, the light emitted from the sensor 1 travels in the direction of the arrow, hits the reflector 38, which is a slope with an angle α to the optical axis, and is reflected in the direction C, and is reflected in the direction of the light receiving element 12. It will not be reflected.
１７．２７．３７はそれぞれ取付用の足である。17, 27, and 37 are mounting feet, respectively.
これらの取付用の足はなくてもよく、また、取付用の足
と斜面である反射体１８．２８．３８との間の位置関係
は自由である。These mounting feet may be omitted, and the positional relationship between the mounting feet and the sloped reflector 18, 28, 38 is free.
第９図は、光軸と、斜面である反射体との角度αと、光
電流、すなわち受光素子の受光量との実験結果である。FIG. 9 shows the experimental results of the angle α between the optical axis and the sloped reflector, and the photocurrent, that is, the amount of light received by the light receiving element.
実線のグラフは、第３図、第７図の実施例における関係
であり、破線のグラフは、第５図、第８図の実施例にお
ける関係である。αを４５°にすると、光電流すなわち
受光量が２分の１になる。光軸と、斜面である反射体と
の角度αを大きくするｔｌど効果がある。The solid line graphs are the relationships in the embodiments shown in FIGS. 3 and 7, and the broken line graphs are the relationships in the embodiments shown in FIGS. 5 and 8. When α is set to 45°, the photocurrent, that is, the amount of received light is halved. This has the effect of increasing the angle α between the optical axis and the reflector, which is an inclined surface.
上記のように構成された反射型ホトセンサは、発光素子
、受光素子の前方に被検出物体以外の反射体が６っても
、その反射体に光があたるまえに、射面であゐ反射体に
光があたり、受光素子の方向以外に反射させるため、受
光素子に反射してくる光はなく′＆ゐ、一方、被検出物
体は、発光素子。In the reflective photo sensor configured as described above, even if there is a reflector other than the object to be detected in front of the light-emitting element and the light-receiving element, before the light hits the reflector, the other reflector is detected on the incident surface. The object to be detected is the light-emitting element.The object to be detected is the light-emitting element.
受光素子の光軸に対して、角度ａがθ″で入るので、被
検出物体があると１１は、発光素子からでｔ党は、被検
出物体に垂直にあたり、反射されて、受光素子に−とり
検出される。Since the angle a is θ'' with respect to the optical axis of the light-receiving element, when there is an object to be detected, the light from the light-emitting element hits the object perpendicularly and is reflected to the light-receiving element. detected.
この発明は、以上説明したように、反射型ホトセンサの
発光素子と受光素子の前方に、斜面である反射体ｔ％う
けるという簡単な構造で、発光素子、受光素子前方に、
他の反射体があるとき、被検出物体の有無を検出する能
力を向上させる効果がある。As explained above, the present invention has a simple structure in which a reflector t%, which is a slope, is provided in front of the light emitting element and the light receiving element of a reflective photosensor, and in front of the light emitting element and the light receiving element.
When other reflectors are present, this has the effect of improving the ability to detect the presence or absence of an object to be detected.
第１図、第２図は、従来の反射型ホトセンサの縦断ｍ［
％１１１ＷＡ、第４図、第５図は、本ＩＪ［Ｋよる反射
屋ホトセンサの実施例の斜視図％＠’図。
１ｇ７図は、本発明による反射型ホトセンサの実施ｆ１
の横断面図、第８図は、本発明による反射型ホトセンサ
の実施例の縦断面図、第９図は、斜面である反射体と光
軸との角度と、光電流すなわち受光量との関係図である
。
１．１１・・・・・・発光素子
２．１２・・・・・・受光素子
！Ｓ、１３，２３．３３・・・・・・ケース４ ・・・
・・・・・・・・・被検出物体５ ・・・・・・・・・
・・・反射体
１６ ２６ ５６・・・・・・アーム
１７．２７．３７ ・・・・・・取付用の足１８．２８
，５８ ・・・・・・斜面である反射体以上
出願人 情州ｍ器株式会社
株式会社瞠肋精玉舎
代理人 弁理士 最上 扮
斜面を光軸この角Ｍ （反）
第９図Figures 1 and 2 show the vertical cross-section m[
%111WA, FIGS. 4 and 5 are perspective views of an embodiment of the reflector photosensor according to IJ[K. Figure 1g7 shows implementation f1 of a reflective photosensor according to the present invention.
8 is a longitudinal sectional view of an embodiment of the reflective photosensor according to the present invention, and FIG. 9 is a relationship between the angle between the reflector, which is a slope, and the optical axis, and the photocurrent, that is, the amount of received light. It is a diagram. 1.11... Light emitting element 2.12... Light receiving element! S, 13, 23. 33...Case 4...
...... Detected object 5 ......
... Reflector 16 26 56 ... Arm 17.27.37 ... Mounting foot 18.28
, 58 ・・・・・・Reflector which is a slope Applicant: Joshu Mki Co., Ltd. Mariso Seigyokusha Co., Ltd. Agent Patent attorney Mogami The slope is set as the optical axis at this angle M (opposite) Fig. 9
Claims (1)
面である反射ａｔ取付けたことｔ％黴とすゐ反射蓋ホト
センサ。A reflective lid photo sensor is equipped with a reflective at slope in front of the light emitting element and light receiving element of the reflective type photo sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56185847A JPS5886469A (en) | 1981-11-19 | 1981-11-19 | Reflective photosensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56185847A JPS5886469A (en) | 1981-11-19 | 1981-11-19 | Reflective photosensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5886469A true JPS5886469A (en) | 1983-05-24 |
| JPH033193B2 JPH033193B2 (en) | 1991-01-17 |
Family
ID=16177914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56185847A Granted JPS5886469A (en) | 1981-11-19 | 1981-11-19 | Reflective photosensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5886469A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02131680U (en) * | 1989-04-06 | 1990-11-01 | ||
| JP2004095560A (en) * | 2003-10-06 | 2004-03-25 | Matsushita Electric Works Ltd | Fall detection switch |
-
1981
- 1981-11-19 JP JP56185847A patent/JPS5886469A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02131680U (en) * | 1989-04-06 | 1990-11-01 | ||
| JP2004095560A (en) * | 2003-10-06 | 2004-03-25 | Matsushita Electric Works Ltd | Fall detection switch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH033193B2 (en) | 1991-01-17 |
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