JPH03102727A - Photoelectric switch - Google Patents
Photoelectric switchInfo
- Publication number
- JPH03102727A JPH03102727A JP1239087A JP23908789A JPH03102727A JP H03102727 A JPH03102727 A JP H03102727A JP 1239087 A JP1239087 A JP 1239087A JP 23908789 A JP23908789 A JP 23908789A JP H03102727 A JPH03102727 A JP H03102727A
- Authority
- JP
- Japan
- Prior art keywords
- light
- lens
- photoelectric switch
- light emitting
- receiving
- 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
- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000000903 blocking effect Effects 0.000 claims abstract 4
- 238000001514 detection method Methods 0.000 claims description 22
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 8
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 241000167880 Hirundinidae Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Light Receiving Elements (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Electronic Switches (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Measurement Of Optical Distance (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、検知エリアにｔ１足された光ビームの被検知
物体による反射光を受光して被検知↑！７Ｉ（水の有燕
を検知ずるＦＡ川の光電スイッチに関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention receives reflected light from an object to be detected of a light beam added to the detection area by t1 to detect ↑! 7I (This concerns a photoelectric switch in the FA river that detects the existence of swallows in water.
［従来の技術］
従来、検知エリアに投光された光ビーｌ、の被検知物体
による反肘光を受光して彼倹知狗体の有焦を検知するＦ
Ａ用の光電スイ・・Ｉチは、披検知物体の表面の反射率
の彰饗や、ｆ’ｒ ＋．＝がらの反射光による影響を受
け薙くするために、三角ｉ’ｉｔｌｌ距方式を用いて構
成されており、一例として、第５ Ｉ７ｌ，７１Ｊ至第
７図に示すように、発光素子１から発する光を投光レン
ズ２にて光ビームとして検知エリアに投光し、上記光ビ
ームの被検知物体Ｘからの反射光を投光レンズ２の側方
に所定距離ＤＥをもって配置されたアナモフィックレン
ズよりなる受光レンズ３にて集光（引き伸ばされた集光
スポットＳを形成〉するとともに、該被検知物体Ｘが光
軸方向に移動したときの集光スポットＳの移動方向が分
割ラインと斜交するように分割された一対の楔状フォト
ダイオード４ａ，４ｂにて形或された受光素子４よりな
る位置検出素子で受光し、判定制御千段５にて上記受光
素子４出力に基づいて物体の有焦を判定して出力回路を
制御するようにした三角測量方式の光電スイッチ（特願
昭６２−４１００Ｇ号）が考えられている。なお、第６
図は、被検知物体Ｘまでの距離がＲ，，Ｒ２，Ｒ３の場
合における集光スポットＳ．，Ｓ２＋ ３３を示してい
る。[Prior art] Conventionally, a light beam projected onto a detection area is used to detect a focused object by receiving the anti-elbow light from an object to be detected.
The photoelectric switch for A...1 is used to measure the reflectance of the surface of the object to be detected, as well as f'r +. In order to eliminate the influence of reflected light from the glass, it is constructed using a triangular distance method, and as an example, as shown in FIG. The emitted light is projected onto the detection area as a light beam by the projection lens 2, and the reflected light of the light beam from the object to be detected The light receiving lens 3 collects the light (forms an elongated focused spot S), and the moving direction of the focused spot S when the detected object X moves in the optical axis direction obliquely intersects the dividing line. The light is received by a position detection element consisting of a light receiving element 4 formed by a pair of wedge-shaped photodiodes 4a and 4b divided as shown in FIG. A triangulation type photoelectric switch (Japanese Patent Application No. 62-4100G) has been proposed that determines the output circuit and controls the output circuit.
The figure shows the focused spot S. when the distance to the detected object X is R, , R2, R3. , S2+33.
第７図は、判定制御手段５の横成例を示すもので、分割
されたフォトダイオード４ａ，４ｂからそれぞれ出力さ
れる位置検出信号１．，Ｉ．は受光回路１１ａ，ｌｌｂ
によって電圧信号Ｖ Ａ ， Ｖ ｓに変換された後、
それぞれ対数増幅回路１２ａ，１２ｂにて対数増幅され
、この対数増幅された信号ＩｎＶＡ，ｉｎＶａを減算回
路１３にて減算することにより、距１１；ｉＲに対応し
た距離信号ｉ ｎ （ Ｖ Ａ ／ Ｖ８〉を測距出力
とするようになっている。比較回路１４では、この距離
信号１ｎ （ＶＡ／ＶＦＩ）と、予め距離設定ボリュー
ムＶ Ｒにて設定された基車電圧Ｖｓと比較して被検知
物体Ｘが検知エリアＤＥに入ったかどうかを判定して物
体検知信号Ｖｘを出力（例えば、距離信号１ｎ（ＶＡ／
Ｖ．）が基準電圧Ｖｓ以下になったときに物体検知信号
Ｖｘを出力）するようになっている。FIG. 7 shows an example of horizontal formation of the determination control means 5, in which position detection signals 1. ,I. are light receiving circuits 11a, llb
After being converted into voltage signals V A , V s by
The logarithmically amplified signals InVA and inVa are respectively logarithmically amplified by the logarithmic amplifier circuits 12a and 12b, and by subtracting the logarithmically amplified signals InVA and inVa by the subtraction circuit 13, a distance signal in (VA/V8) corresponding to the distance 11;iR is obtained. The comparator circuit 14 compares this distance signal 1n (VA/VFI) with the base vehicle voltage Vs set in advance by the distance setting volume VR to detect the detected object. Determine whether X has entered the detection area DE and output the object detection signal Vx (for example, distance signal 1n (VA/
V. ) is below the reference voltage Vs, an object detection signal Vx is output.
この物体検知信号Ｖｘは、信号処理回路１５によって正
常信号かどうかが判足され、出力回路１６を介して出力
される。なお、発光素子１はドライブ回路１７によって
駆動され、発振回路１８にて発生されたクロック信号に
同期して発光されるようになっている。一方、信号処理
回路１５では、上記クロック信号に基づいて物体検知信
号ＶＸをサンプリングして正常信号か否かを判定するよ
うになっている。また、受光回路１１ａ，ｌｌｂには、
特定周波数のパルス信号のみを通過させ直流成分をカッ
トするバンドパスフィルタ回路が設けられている。また
、上記例では、Ｉｎ （ＶＡ／Ｖ．）を演算して距離信
号としているが、ＶＡ／Ｖ．，（Ｖ−ＶＢ）／ （ＶＡ
＋ＶＢ）， ｉｎ （ＶＡ−ＶＢ）／ （ＶＡ ＋ Ｖ
ａ ）を演算して距離信号とし、被検知物体Ｘが検知
エリア内に存在するかどうかを判定するように判定制御
手段５を形成しても良い。This object detection signal Vx is determined by the signal processing circuit 15 as to whether it is a normal signal or not, and is outputted via the output circuit 16. Note that the light emitting element 1 is driven by a drive circuit 17 and emits light in synchronization with a clock signal generated by an oscillation circuit 18. On the other hand, the signal processing circuit 15 samples the object detection signal VX based on the clock signal and determines whether it is a normal signal or not. In addition, the light receiving circuits 11a and llb include
A bandpass filter circuit is provided that passes only pulse signals of a specific frequency and cuts DC components. Further, in the above example, In (VA/V.) is calculated and used as a distance signal, but VA/V. , (V-VB)/ (VA
+VB), in (VA-VB)/ (VA + V
The determination control means 5 may be configured to calculate a) and use it as a distance signal to determine whether or not the detected object X exists within the detection area.
一方、光学系の構成を簡略化するとともに、光軸調整を
不要とした光電スイッチとして、第８図乃至第１１図に
示すようなものがあり、発光素子１と、受光素子４およ
び信号処理手段を一体化した集積回路と、投光レンズ２
および受光レンズ３を一体化したレンズブロック６とを
同一回路基板７に直接配設し、組み立ておよび光軸の調
整を簡略化するとともに、小型化を図るようにしたもの
があった。なお、レンズブロック６の回路基板７への装
着は、各レンズ２，３の突起２ｈ，３１１を回路基板７
の孔７ａに押入して先端を溶融することによって取着さ
れるようになっている。ここに、レンズブロック６の両
レンズ２．３は、入射レンズ面と出射レンズ面とが直交
したレンズ面を有し両レンズ面間をプリズムにて接続し
たものとなっている。第８図中、２３はケース、２４は
前面カバー、２５は支持板、２６は銘板、２７ａはレン
ジ設定つまみ、２７ｂは動ｆＩｒ′モード設定つまみ、
２８はＯリング、２９はパッキング、３０はキャップ、
３１はコードである。On the other hand, there are photoelectric switches shown in FIGS. 8 to 11 that simplify the configuration of the optical system and eliminate the need for optical axis adjustment. integrated circuit and light emitting lens 2
In some devices, a lens block 6 in which a light receiving lens 3 is integrated are directly disposed on the same circuit board 7 to simplify assembly and adjustment of the optical axis and to achieve miniaturization. Note that when attaching the lens block 6 to the circuit board 7, the protrusions 2h and 311 of each lens 2 and 3 are attached to the circuit board 7.
It is attached by pushing it into the hole 7a and melting the tip. Here, both lenses 2.3 of the lens block 6 have lens surfaces in which an entrance lens surface and an exit lens surface are perpendicular to each other, and the two lens surfaces are connected by a prism. In Fig. 8, 23 is a case, 24 is a front cover, 25 is a support plate, 26 is a nameplate, 27a is a range setting knob, 27b is a dynamic fIr' mode setting knob,
28 is O-ring, 29 is packing, 30 is cap,
31 is a code.
［発明が解決しようとする課Ｍ］
しかしながら、上述の従来例にあっては、両レンズ２．
３の投光、受光軸を含む面に垂直なレンズ側面２ｄ，２
ｅ、３ｃｆ，３ｅによる不要光反Ｑ＋によって測距誤差
および不感帯が生じるという問題があった。例えば、発
光素子１か八発せられる光のうち、入射レンズ面２ａ、
プリズム而２ｃむよび出射レンズ面２ｂを通った光は、
主ビーｌ＼光Ｐとして投光されるか、レンズ側而２ｄ〜
２ｇによる反射によって、第１２図に示すように、４木
の副ビーム光Ｐｌ゜〜Ｐ４′が投光されることになる。[Problem M to be solved by the invention] However, in the above-mentioned conventional example, both lenses 2.
3, the lens side surface 2d, 2 perpendicular to the plane containing the light emitting and receiving axes.
There is a problem in that distance measurement errors and dead zones occur due to unnecessary light reflection Q+ caused by e, 3cf, and 3e. For example, among the light emitted from the light emitting elements 1 and 8, the incident lens surface 2a,
The light passing through the prism 2c and the exit lens surface 2b is
Is it projected as the main beam L\light P?The lens side 2d~
As a result of the reflection by 2g, four sub-beam lights P1° to P4' are projected as shown in FIG.
これらの副ビーム光Ｐ１゛〜・Ｐ４゜のうち例えばレン
ズ側面２ｄで反射した副ビーム光Ｐ１゜の被検知物体Ｘ
による反射光が受光レンズ３にて受光されると、第１３
図に示すように、位置検出素子上に２つの集光スポット
ｓ，ｓ’が形成され、被検知物体Ｘまでの実際の距Ｍ
（Ｒ３）が、両集光スポットｓ，ｓ’の光エネルギの重
心位置に相当する距Ｍ （Ｒ，とＲ，との間の距離〉と
誤判定されることになる。Among these sub-beam lights P1゛~・P4゜, for example, the detected object X of the sub-beam light P1゜ reflected on the lens side surface 2d
When the reflected light is received by the light receiving lens 3, the 13th
As shown in the figure, two condensed spots s and s' are formed on the position detection element, and the actual distance M to the detected object
(R3) will be erroneously determined to be the distance M (distance between R, and R) which corresponds to the center of gravity of the optical energy of both the focused spots s and s'.
また、同様にして、受光レンズ３内でもレンズ側而３ｄ
〜３ｇの反射、拡故光によるフレアが生じることになり
、このフレア光が光分布をもって位置検出素子上に照射
される。このフレア光は被検知物体Ｘが近付いてくるに
従って大きくなり、距ｉ１１！Ｒと測距信号１ｎ（ＶＡ
／Ｖ．）との関係は、第ｌ４図に示すようになる。ここ
に、Ｒ０以下の近距離において、フレア光によって距離
信号Ｉｎ（ Ｖ Ａ／ Ｖ ｓ ）が上昇している点が
問題になり、このような距離信号１ｎＶＡ／Ｖｌｌによ
って距ＮＲ０以下の距離判定が行えない上、距ＭＲ ｌ
。以下の場合にも誤判定が行われる堝ながあるという問
題があった。Similarly, within the light receiving lens 3, the lens side 3d is
Flare occurs due to the reflected and diffused light of ~3 g, and this flare light is irradiated onto the position detection element with a light distribution. This flare light becomes larger as the detected object X approaches, and the distance i11! R and ranging signal 1n (VA
/V. ) is shown in Figure 14. The problem here is that the distance signal In(VA/Vs) increases due to the flare light at short distances below R0, and such distance signals 1nVA/Vll cannot be used to judge distances below NR0. Not only can it not be done, but the distance MR l
. There is also a problem in that erroneous determinations may occur in the following cases.
本発明は上記の点に鑑みて為されたものであり、その目
的とするところは、投光、受光レンズのレンズ側面の反
射光に起因する測距誤差あるいは不感帯の発生を防止で
きる光電スイッチを提供することにある．
［課題を解決するための手段］
本発明の光電スイッチは、発光素子から発する光を投光
レンズにて光ビームとして検知エリアに投光し、上記光
ビー１１の被検知物体からの反射光を受光レンズにて集
光するとともに、該被検知物体が光軸方向に移動したと
きの集光スポットの移動を位置検出素子にて検出し、判
定制御手段にて上記位置検出素子出力に基づいて物体の
有無を刊定して出力回路を制御するようにした三角測量
方式の光電スイッチにおいて、発光素子、位置検出素子
および信号処理手段を実装した回路基板に、投光レンズ
および受光レンズを一体化したレンズブロックを配設し
、入射レンズ面と出射レンズ面とが直交したレンズ面を
有し両レンズ面間をプリズムにて接続して両レンズを形
成して成る光電スイッチにおいて、少なくとも投光、受
光軸を含む面に垂直なレンズ側面に不要光反射阻止手段
を設けたものである。The present invention has been made in view of the above points, and its purpose is to provide a photoelectric switch that can prevent distance measurement errors or dead zones caused by light reflected from the side surfaces of the light emitting and receiving lenses. The purpose is to provide. [Means for Solving the Problems] The photoelectric switch of the present invention projects light emitted from a light emitting element into a detection area as a light beam using a projecting lens, and uses reflected light from the object to be detected of the light beam 11. The light receiving lens collects the light, and the position detection element detects the movement of the focused spot when the object to be detected moves in the optical axis direction, and the determination control means detects the object based on the output of the position detection element. In a triangulation-type photoelectric switch that controls the output circuit by determining the presence or absence of In a photoelectric switch in which a lens block is arranged, an input lens surface and an output lens surface are perpendicular to each other, and both lens surfaces are connected by a prism to form both lenses, at least light emission and light reception are possible. An unnecessary light reflection preventing means is provided on the side surface of the lens perpendicular to the plane containing the axis.
［作 用］
本発明は上述のように構成されており、三角測量方式の
光電スイッチであって、発光素子、位置検出素子および
信号処理手段を実装した回路基板に、投光レンズおよび
受光レンズを一体化したレンズブロックを配設し、入射
レンズ面と出射レンズ面とが直交したレンズ面を有し両
レンズ面間をプリズムにて接続して両レンズを形成して
成る光氾スイッチにおいて、少なくとも投光、受光軸を
含む而に垂直なレンズ側面に不要光反射附止手段を設け
たものであり、投光、受光レンズのレンズ側而による反
射光に起因する測距誤差あるいは不感帯の発生を防止で
きる光電スイッチを提洪するものである。[Function] The present invention is configured as described above, and is a triangulation type photoelectric switch in which a light emitting lens and a light receiving lens are mounted on a circuit board on which a light emitting element, a position detection element, and a signal processing means are mounted. An optical flood switch in which an integrated lens block is disposed, an input lens surface and an output lens surface are perpendicular to each other, and both lens surfaces are connected by a prism to form both lenses. A means for preventing unwanted light reflection is provided on the side of the lens that is perpendicular to the light emitting and light receiving axes, and prevents distance measurement errors or dead zones caused by reflected light from the lens sides of the light emitting and light receiving lenses. We propose a photoelectric switch that can prevent this.
［実施例］
第１図は本発明一実施例を示すもので、前記従来例と同
様に、発光素子１、受光素子４および信号処理手段を一
体化した集積回路８と、投光レンズ１および受光レンズ
３を一体化したレンズブロック６を同一回路基板７に直
接配設し、入射レンズ面と出射レンズ面とが直交し両レ
ンズ面間をプリズムにて接続して両レンズ２．３を形戊
した尤電スイッチにおいて、投光レンズ２，受光レンズ
３の少なくとも投光、受光軸を含む面に垂直なレ冫ズ側
面に不要光反射阻止手段を設けたもので＋Ｐｌる。[Embodiment] FIG. 1 shows an embodiment of the present invention, in which, like the conventional example, an integrated circuit 8 that integrates a light emitting element 1, a light receiving element 4, and a signal processing means, a light emitting lens 1, and A lens block 6 with an integrated light receiving lens 3 is directly disposed on the same circuit board 7, and the entrance lens surface and the exit lens surface are perpendicular to each other, and both lens surfaces are connected by a prism to form both lenses 2.3. In the above-mentioned light emitting switch, an unnecessary light reflection prevention means is provided on the side surface of the lens perpendicular to the plane containing at least the light emitting and light receiving axes of the light emitting lens 2 and the light receiving lens 3.
ここに、実施例では、上二己不要光反射阻止手段を黒色
塗装（第１図（ａ）の斜線部分〉、プリズｌ、（第１図
（ｂ））、あるいは複数の小プリズムよりなるブリズム
アレイ（第１図〈Ｃ〉〉にて形成している。Here, in the embodiment, the upper two unnecessary light reflection prevention means are painted black (the shaded area in FIG. 1(a)), a prism (see FIG. 1(b)), or a brism array consisting of a plurality of small prisms. (It is formed in Fig. 1 <C>>).
第２図は、各種の不要反射光抑制手段およびそのゴース
ト比Ｇの測定結果を示すものであり、ユ｛塗装を施した
もの、ｉ３よび（ヌ｝の形状のブリズｌ１を形成したも
のにナ３いて、顕著な反射光の抑圧効果（ゴースト比Ｇ
が小さい）が得られている。Figure 2 shows various unnecessary reflected light suppression means and the measurement results of their ghost ratios G. 3, remarkable reflected light suppression effect (ghost ratio G
) is obtained.
また、台座のあるプリズムを形成したもの（イ〉（ロ）
のほうがプリズムのみを形或したもの（ト）（チ〉より
も反射光の抑制効果が得られており、レンズ側面にプリ
ズムを形成する場合において、プリズムの頂角がレンズ
側面よりも離れているほうが大きな反射抑制効果が得ら
れるという結果が得られている．ここに、ゴースト比Ｇ
は、距Ｎ５ｍｍ（あるいは１０ｍｍ）での受光量を、距
Ｍ１００ｍｍでの受光量で除したものである。Also, those that form a prism with a pedestal (I) (B)
This has a better effect of suppressing reflected light than the one with only a prism (G) and (C), and when forming a prism on the side of the lens, the apex angle of the prism is farther away than the side of the lens. The results show that a larger reflection suppression effect can be obtained when the ghost ratio G
is the amount of light received at a distance N5 mm (or 10 mm) divided by the amount of light received at a distance M100 mm.
なお、反射光を抑制してゴースト比Ｇを小さくする点で
は、レンズ側面２ｅに第１図（ａ）に示すように黒塗装
を施すのがもつとも効果的であるが、レンズ側面２ｅに
プリズムを形成する場合には、両レンズ２，３の成形時
に一体成形できるので、製造工程を簡略化でき、コスト
的に有利である．また、黒塗装に代えて黒シールを貼着
することが考えられるが、密着性に問題が生じるために
反射抑制効果が殆ど得られなかった。In addition, in terms of suppressing reflected light and reducing the ghost ratio G, it is effective to apply black coating to the lens side surface 2e as shown in FIG. In this case, since both lenses 2 and 3 can be integrally formed when molding, the manufacturing process can be simplified and it is advantageous in terms of cost. Furthermore, it has been considered that a black sticker may be attached instead of the black paint, but this would cause a problem in adhesion, so that almost no reflection suppressing effect could be obtained.
第４図は他の実施例を示すもので、ｍ距範囲内で被検知
物体Ｘが移動した場ａに対応する集光スポットＳの移動
範囲外に、フレアＦ７／ａ償用の受光素子４Ｃを設けた
ものであり、この受光素子／ｌ Ｃ出力により従来例に
おける距離信号ＩＶ Ａ／Ｖ．を補正してフレア光によ
る測距誤差および不感帯の発生をより少なくしている。FIG. 4 shows another embodiment, in which a light receiving element 4C for compensating for flare F7/a is placed outside the movement range of the condensing spot S corresponding to the field a when the detected object X moves within the m distance range. is provided, and the distance signal IV A/V. is corrected to further reduce distance measurement errors and dead zones caused by flare light.
すなわち、受光素子４から出力される一対の位置検出信
号■い，Ｉｎのうちの一方（実施例ではＩ．）に、受光
素子４Ｃ出力Ｉ。を加算した信号■６゜とし、Ｉｎ （
ＶＡ／Ｖ．’ ）を距離信号（但シ、■１はＩＩｌ’を
■一■変換した値）とすることにより、距離信号Ｉｎ
（ ＶＡ／ Ｖａ’ ）の近距離部分が第３図の一点鎖
線ｂのよう浦正されることになり、フレアに起因する測
距誤差および不感帯の発土を除去できるようになってい
る。That is, one of the pair of position detection signals I and In outputted from the light receiving element 4 (I. in the embodiment) is the output I of the light receiving element 4C. Assume that the signal obtained by adding ■6° is In (
VA/V. ' ) as a distance signal (however, ■1 is the value obtained by converting IIl' to ■1■), the distance signal In
The short-range portion of (VA/Va') is corrected as shown by the dashed-dotted line b in FIG. 3, thereby making it possible to eliminate ranging errors and dead zone formation caused by flare.
［発明の効果］
本発明は上述のように構成されており、三角測量方式の
光電スイッチであって、発光素子、位置検出素子および
信号処理手段を実装した回路基板に、投光レンズおよび
受光レンズを一体化したレンズブロックを配設し、入射
レンズ面と出射レンズ面とが直交したレンズ面を有し両
レンズ面間をプリズムにて接続して両レンズを形成して
成る光電スイッチにおいて、少なくとも投光、受光軸を
含む面に垂直なレンズ側面に不要光反射阻止手段を設け
たものであり、投光、受光レンズのレンズ側面による反
射光に起因する測距誤差および不感帯の発生を防止する
ことができるという効果がある。[Effects of the Invention] The present invention is configured as described above, and is a triangulation type photoelectric switch in which a light emitting lens and a light receiving lens are mounted on a circuit board on which a light emitting element, a position detection element, and a signal processing means are mounted. A photoelectric switch is provided with a lens block in which an input lens surface and an output lens surface are orthogonal to each other, and both lens surfaces are connected by a prism to form both lenses. An unnecessary light reflection prevention means is provided on the side surface of the lens perpendicular to the plane containing the light emitting and light receiving axes, and prevents distance measurement errors and dead zones caused by reflected light from the lens sides of the light emitting and light receiving lenses. It has the effect of being able to
第１図（ａ）（ｂ）（ｃ）は本発明一実施例の要部斜呪
図、第２図および第３図は同上の動作説明図、第ｌ１図
は他の実施例の概略構或図、第５図は本発明に係る光電
スイッチの概略構或図、第６図は同上の動作説明図、第
７図は同上のブロック回路図、第８図は従来例の分解斜
視図、第９図および第１０図（ａ） （ｂ）は同上の要
部断面図、第１１図は同上の要部斜呪図、第１２図乃至
第１４図は同」二の問題点を示す動作説明図である。
１は発光素子、２は投光レンズ、３は受光レンズ、４は
受光素子、４ａ，４ｂはフォトダイオード、５は判別制
御手段、６はレンズブロック、７は回路基板である．FIGS. 1(a), (b), and (c) are oblique views of essential parts of one embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of the same operation, and FIG. 11 is a schematic diagram of another embodiment. 5 is a schematic diagram of a photoelectric switch according to the present invention, FIG. 6 is an explanatory diagram of the same operation, FIG. 7 is a block circuit diagram of the same, and FIG. 8 is an exploded perspective view of a conventional example. Figures 9 and 10 (a) and (b) are sectional views of the main parts of the same as above, Figure 11 is an oblique view of the main parts of the same as above, and Figures 12 to 14 are operations showing the problem in the second part of the same. It is an explanatory diagram. 1 is a light emitting element, 2 is a light emitting lens, 3 is a light receiving lens, 4 is a light receiving element, 4a and 4b are photodiodes, 5 is a discrimination control means, 6 is a lens block, and 7 is a circuit board.
Claims (3)
として検知エリアに投光し、上記光ビームの被検知物体
からの反射光を受光レンズにて集光するとともに、該被
検知物体が光軸方向に移動したときの集光スポットの移
動を位置検出素子にて検出し、判定制御手段にて上記位
置検出素子出力に基づいて物体の有無を判定して出力回
路を制御するようにした三角測量方式の光電スイッチで
あつて、発光素子、位置検出素子および信号処理手段を
実装した回路基板に、投光レンズおよび受光レンズを一
体化したレンズブロックを配設し、入射レンズ面と出射
レンズ面とが直交したレンズ面を有し両レンズ面間をプ
リズムにて接続して両レンズを形成して成る光電スイッ
チにおいて、少なくとも投光、受光軸を含む面に垂直な
レンズ側面に不要光反射阻止手段を設けたことを特徴と
する光電スイッチ。(1) The light emitted from the light emitting element is projected onto the detection area as a light beam using a light projecting lens, and the reflected light of the light beam from the object to be detected is collected by the light receiving lens. The position detection element detects the movement of the focused spot when it moves in the optical axis direction, and the determination control means determines the presence or absence of an object based on the output of the position detection element and controls the output circuit. This is a triangulation type photoelectric switch, in which a lens block that integrates a light emitting lens and a light receiving lens is arranged on a circuit board on which a light emitting element, a position detecting element, and a signal processing means are mounted. In a photoelectric switch that has lens surfaces orthogonal to each other and is formed by connecting both lens surfaces with a prism to form both lenses, unnecessary light is reflected at least on the side surface of the lens perpendicular to the plane containing the light emitting and light receiving axes. A photoelectric switch characterized by being provided with a blocking means.
ことを特徴とする請求項１記載の光電スイッチ。(2) The photoelectric switch according to claim 1, wherein the unnecessary light reflection preventing means is formed with black paint.
ズムアレイにて形成したことを特徴とする請求項１記載
の光電スイッチ。(3) The photoelectric switch according to claim 1, wherein the unnecessary light reflection preventing means is formed of a prism or a prism array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1239087A JP2613655B2 (en) | 1989-09-14 | 1989-09-14 | Photoelectric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1239087A JP2613655B2 (en) | 1989-09-14 | 1989-09-14 | Photoelectric switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03102727A true JPH03102727A (en) | 1991-04-30 |
| JP2613655B2 JP2613655B2 (en) | 1997-05-28 |
Family
ID=17039629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1239087A Expired - Fee Related JP2613655B2 (en) | 1989-09-14 | 1989-09-14 | Photoelectric switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2613655B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0484270A2 (en) * | 1990-11-02 | 1992-05-06 | Elesta Ag Elektronik | Light pen or barrier |
| JP2001235421A (en) * | 2000-12-27 | 2001-08-31 | Idec Izumi Corp | Photoelectric switch |
| US6650401B2 (en) | 2001-12-28 | 2003-11-18 | Mitsubishi Denki Kabushiki Kaisha | Optical distance sensor |
| JP2004020277A (en) * | 2002-06-13 | 2004-01-22 | Hikari:Kk | Optical displacement sensor and optical displacement measuring instrument and optical element |
| JP2009170635A (en) * | 2008-01-16 | 2009-07-30 | Takenaka Electronic Industrial Co Ltd | Photoreceptor of transmission-typephotoelectric sensor |
| CN113302516A (en) * | 2019-01-16 | 2021-08-24 | 株式会社电装 | Optical distance measuring device and method for detecting generation of abnormality in optical distance measuring device |
| WO2022196360A1 (en) * | 2021-03-17 | 2022-09-22 | 株式会社小糸製作所 | Light-receiving element and measurement device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5081247U (en) * | 1973-11-26 | 1975-07-12 | ||
| JPS5887514A (en) * | 1981-11-20 | 1983-05-25 | Olympus Optical Co Ltd | Focus detecting device and focused position setting device |
| JPS58224314A (en) * | 1982-06-22 | 1983-12-26 | Copal Co Ltd | Focus detector |
| JPS59101341U (en) * | 1982-12-24 | 1984-07-09 | オムロン株式会社 | groove type photoelectric switch |
| JPS6059437U (en) * | 1983-09-30 | 1985-04-25 | オムロン株式会社 | optical micro switch |
-
1989
- 1989-09-14 JP JP1239087A patent/JP2613655B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5081247U (en) * | 1973-11-26 | 1975-07-12 | ||
| JPS5887514A (en) * | 1981-11-20 | 1983-05-25 | Olympus Optical Co Ltd | Focus detecting device and focused position setting device |
| JPS58224314A (en) * | 1982-06-22 | 1983-12-26 | Copal Co Ltd | Focus detector |
| JPS59101341U (en) * | 1982-12-24 | 1984-07-09 | オムロン株式会社 | groove type photoelectric switch |
| JPS6059437U (en) * | 1983-09-30 | 1985-04-25 | オムロン株式会社 | optical micro switch |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0484270A2 (en) * | 1990-11-02 | 1992-05-06 | Elesta Ag Elektronik | Light pen or barrier |
| JP2001235421A (en) * | 2000-12-27 | 2001-08-31 | Idec Izumi Corp | Photoelectric switch |
| US6650401B2 (en) | 2001-12-28 | 2003-11-18 | Mitsubishi Denki Kabushiki Kaisha | Optical distance sensor |
| JP2004020277A (en) * | 2002-06-13 | 2004-01-22 | Hikari:Kk | Optical displacement sensor and optical displacement measuring instrument and optical element |
| JP2009170635A (en) * | 2008-01-16 | 2009-07-30 | Takenaka Electronic Industrial Co Ltd | Photoreceptor of transmission-typephotoelectric sensor |
| CN113302516A (en) * | 2019-01-16 | 2021-08-24 | 株式会社电装 | Optical distance measuring device and method for detecting generation of abnormality in optical distance measuring device |
| WO2022196360A1 (en) * | 2021-03-17 | 2022-09-22 | 株式会社小糸製作所 | Light-receiving element and measurement device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2613655B2 (en) | 1997-05-28 |
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| LAPS | Cancellation because of no payment of annual fees |