JP3144039B2 - Optical displacement sensor - Google Patents
Optical displacement sensorInfo
- Publication number
- JP3144039B2 JP3144039B2 JP04098900A JP9890092A JP3144039B2 JP 3144039 B2 JP3144039 B2 JP 3144039B2 JP 04098900 A JP04098900 A JP 04098900A JP 9890092 A JP9890092 A JP 9890092A JP 3144039 B2 JP3144039 B2 JP 3144039B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light receiving
- lens
- axis
- projecting
- 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.)
- Expired - Fee Related
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Optical Distance (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は三角測量法により検出対
象までの距離を光学的に正確に測定する光学変位センサ
に関し、特に位置検出精度を向上させるようにした光学
変位センサに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical displacement sensor for optically and accurately measuring a distance to an object to be detected by a triangulation method, and more particularly to an optical displacement sensor having improved position detection accuracy.
【０００２】[0002]
【従来の技術】従来物体までの距離を検出するセンサと
して第４図に示すような三角測量法による光学変位セン
サが用いられている。この装置では発光ダイオード等の
投光素子１をドライブ回路２より駆動し、その光を投光
レンズ３を用いて平行な光ビームとして距離を検出すべ
き方向に照射している。そして投光レンズ３から所定距
離隔てた位置に物体４からの反射光を受光する受光レン
ズ５と、その後方に光の照射位置に基づいて両端に異な
った電流出力を与える位置検出素子（ＰＳＤ；ポジショ
ンセンシティブディバイス）６が設けられる。物体４が
レンズ２の前面から所定距離隔てた位置でこの光ビーム
を遮断した場合には、拡散反射光が受光レンズ５によっ
て受光されＰＳＤ６に照射される。従って投光レンズ３
から検知対象物体４までの距離によってＰＳＤ６上に照
射される反射光の位置が変化する。ＰＳＤ６にはバイア
ス用電源７が接続され、光の照射位置に応じて異なる２
つのアナログ電流出力を両端より外部に与えるものであ
って、夫々の出力はＩ／Ｖ変換器８，９に与えられる。
Ｉ／Ｖ変換器８，９はＰＳＤ６からの電流出力を電圧信
号に変換し減算器１０及び加算器１１に与える。そして
割算器１２は減算器１０，加算器１１の出力を除算する
ことによって、受光量の総和にかかわらず正規化して受
光位置に対応した信号として出力するようにしている。2. Description of the Related Art Conventionally, an optical displacement sensor based on a triangulation method as shown in FIG. 4 has been used as a sensor for detecting a distance to an object. In this device, a light emitting element 1 such as a light emitting diode is driven by a drive circuit 2 and the light is emitted as a parallel light beam using a light emitting lens 3 in a direction in which a distance is to be detected. A light receiving lens 5 for receiving the reflected light from the object 4 at a position separated from the light projecting lens 3 by a predetermined distance, and a position detecting element (PSD; A position-sensitive device 6 is provided. When the object 4 blocks this light beam at a position separated from the front surface of the lens 2 by a predetermined distance, the diffusely reflected light is received by the light receiving lens 5 and irradiated to the PSD 6. Therefore, the projection lens 3
The position of the reflected light irradiated on the PSD 6 changes depending on the distance from the object to the detection target object 4. A bias power supply 7 is connected to the PSD 6 and varies depending on the light irradiation position.
The two analog current outputs are supplied from both ends to the outside. The respective outputs are supplied to I / V converters 8 and 9.
The I / V converters 8 and 9 convert the current output from the PSD 6 into a voltage signal and supply the voltage signal to the subtractor 10 and the adder 11. The divider 12 divides the outputs of the subtractor 10 and the adder 11 so as to normalize regardless of the total amount of received light and to output a signal corresponding to the light receiving position.
【０００３】図５（ａ）は従来の光学変位センサの光学
系部材の構造を示す斜視図、（ｂ），（ｃ）はその受光
軸側の断面図である。本図に示す光学ベース１３は、投
光素子１，投光レンズ３と受光レンズ５及びＰＳＤ６を
固定するためのベースである。このベースには図５
（ａ）に示すように投光軸用の開口１３ａ及び受光軸用
の開口１３ｂが設けられる。図５（ｂ）はＰＳＤ６と開
口１３ｂを通る断面図であり、図示のように接着剤で受
光レンズ５が取付けられる。又図５（ｃ）に示すように
開口１３ｂにねじが形成され、その内側にねじ溝と噛合
するホルダ１４によって受光レンズ５を固定して、光学
系が構成される場合もある。投光側についても同様であ
る。FIG. 5A is a perspective view showing the structure of an optical system member of a conventional optical displacement sensor, and FIGS. 5B and 5C are sectional views on the light receiving axis side. The optical base 13 shown in the figure is a base for fixing the light projecting element 1, the light projecting lens 3, the light receiving lens 5, and the PSD 6. Fig. 5
As shown in (a), an opening 13a for a light emitting axis and an opening 13b for a light receiving axis are provided. FIG. 5B is a cross-sectional view passing through the PSD 6 and the opening 13b, and the light receiving lens 5 is attached with an adhesive as shown. In addition, as shown in FIG. 5C, an optical system may be formed by forming a screw in the opening 13b and fixing the light receiving lens 5 inside the opening 13b by a holder 14 meshing with a screw groove. The same applies to the light emitting side.
【０００４】[0004]
【発明が解決しようとする課題】しかるにこのような従
来の光学変位センサによれば、受光レンズ５がＰＳＤ６
に対して位置ずれを起こした場合、投光レンズ３が投光
素子１に対して位置ずれを起こした場合、ＰＳＤ６が他
の部材に対して位置ずれを起こした場合、投光素子１が
他の部材に対して位置ずれを起こした場合には、いずれ
もＰＳＤ上の結像位置がずれ、ＰＳＤの両端の出力が変
動する。従って正確な測定精度が要求される光学変位セ
ンサでは、これらの光学部材を正確な位置に固定してお
かなければならない。However, according to such a conventional optical displacement sensor, the light receiving lens 5 has the PSD 6
, The light projecting lens 3 is misaligned with respect to the light projecting element 1, the PSD 6 is misaligned with respect to other members, and the light projecting element 1 In any case, the imaging position on the PSD is shifted, and the output at both ends of the PSD fluctuates. Therefore, in an optical displacement sensor that requires accurate measurement accuracy, these optical members must be fixed at accurate positions.
【０００５】しかるに図５に示すような接続方法では光
学系を一時的に固定することはできるが、周囲温度の変
化に対して各光学部材を光学ベース１３に対し正確に固
定することは難しいという欠点があった。光学ベース１
３は通常アルミニウム等の金属製部材で形成され、レン
ズは樹脂により構成されている。そのため熱膨張差が大
きく、急激な温度変化があればストレスが生じ、接着自
体がとれてレンズ３，５が脱落したり、レンズの位置が
ずれるという欠点があった。従って従来は温度変化に対
して安定性が悪い光学変位センサとなっていた。Although the optical system can be temporarily fixed by the connection method shown in FIG. 5, it is difficult to accurately fix each optical member to the optical base 13 with respect to a change in ambient temperature. There were drawbacks. Optical base 1
Reference numeral 3 is usually formed of a metal member such as aluminum, and the lens is made of resin. For this reason, there is a drawback that the thermal expansion difference is large and a sudden temperature change causes a stress, the adhesion itself is removed, the lenses 3 and 5 are dropped, and the positions of the lenses are shifted. Therefore, conventionally, the optical displacement sensor has poor stability against a temperature change.
【０００６】本発明はこのような従来の問題点に鑑みて
なされたものであって、投受光素子やレンズの光軸がず
れないように接続し、温度変化に対する安定性を向上さ
せるようにすることを技術的課題とする。SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and is connected so that the optical axes of a light emitting / receiving element and a lens are not shifted, thereby improving stability against a temperature change. This is a technical issue.
【０００７】[0007]
【課題を解決するための手段】本願の請求項１の発明
は、投光素子と、投光素子の光を集束して投光軸に沿っ
て投光する投光レンズと、投光軸上の物体から反射され
る受光軸上の光を受光する受光レンズと、受光レンズの
背後に設けられる受光素子とを具備し、受光素子の受光
位置に基づいて物体までの距離を検出する光学変位セン
サであって、受光レンズは、受光レンズの中心を通り投
光軸と受光軸で成す面に垂直な２点で固定したことを特
徴とするものである。According to a first aspect of the present invention, there is provided a light projecting element, a light projecting lens for converging light of the light projecting element and projecting the light along a light projecting axis. An optical displacement sensor comprising a light receiving lens for receiving light on a light receiving axis reflected from an object, and a light receiving element provided behind the light receiving lens, and detecting a distance to the object based on a light receiving position of the light receiving element Wherein the light receiving lens is fixed at two points passing through the center of the light receiving lens and perpendicular to a plane formed by the light projecting axis and the light receiving axis.
【０００８】本願の請求項２の発明は、投光素子と、投
光素子の光を集束して投光軸に沿って投光する投光レン
ズと、投光軸上の物体から反射される受光軸上の光を受
光する受光レンズと、受光レンズの背後に設けられる受
光素子とを具備し、受光素子の受光位置に基づいて物体
までの距離を検出する光学変位センサであって、投光レ
ンズは、投光レンズの中心を通り、投光軸と受光軸で成
す面に垂直な２点で固定したことを特徴とするものであ
る。According to a second aspect of the present invention, there is provided a light projecting element, a light projecting lens for converging light of the light projecting element and projecting the light along the light projecting axis, and being reflected from an object on the light projecting axis. An optical displacement sensor comprising: a light receiving lens for receiving light on a light receiving axis; and a light receiving element provided behind the light receiving lens, and detecting a distance to an object based on a light receiving position of the light receiving element. The lens is fixed at two points passing through the center of the light projecting lens and perpendicular to a plane formed by the light projecting axis and the light receiving axis.
【０００９】本願の請求項３の発明は、投光素子と、投
光素子の光を集束して投光軸に沿って投光する投光レン
ズと、投光軸上の物体から反射される受光軸上の光を受
光する受光レンズと、受光レンズの背後に設けられる受
光素子とを具備し、受光素子の受光位置に基づいて物体
までの距離を検出する光学変位センサであって、受光素
子は、受光素子の中心を通り投光軸と受光軸で成す面に
垂直な２点で固定したことを特徴とするものである。According to a third aspect of the present invention, there is provided a light projecting element, a light projecting lens for converging the light of the light projecting element and projecting the light along the light projecting axis, and being reflected from an object on the light projecting axis. An optical displacement sensor comprising: a light receiving lens for receiving light on a light receiving axis; and a light receiving element provided behind the light receiving lens, and detecting a distance to an object based on a light receiving position of the light receiving element. Is characterized by being fixed at two points passing through the center of the light receiving element and perpendicular to the plane formed by the light projecting axis and the light receiving axis.
【００１０】本願の請求項４の発明は、投光素子と、投
光素子の光を集束して投光軸に沿って投光する投光レン
ズと、投光軸上の物体から反射される受光軸上の光を受
光する受光レンズと、受光レンズの背後に設けられる受
光素子とを具備し、受光素子の受光位置に基づいて物体
までの距離を検出する光学変位センサであって、投光素
子は、投光素子の中心を通り投光軸と受光軸で成す面に
垂直な２点で固定したことを特徴とするものである。According to a fourth aspect of the present invention, there is provided a light projecting element, a light projecting lens for converging light of the light projecting element and projecting the light along the light projecting axis, and being reflected from an object on the light projecting axis. An optical displacement sensor comprising: a light receiving lens for receiving light on a light receiving axis; and a light receiving element provided behind the light receiving lens, and detecting a distance to an object based on a light receiving position of the light receiving element. The device is characterized in that it is fixed at two points passing through the center of the light projecting element and perpendicular to the plane formed by the light projecting axis and the light receiving axis.
【００１１】[0011]
【作用】このような特徴を有する本発明によれば、受光
レンズ，投光レンズ，受光素子，投光素子はいずれも投
光軸と受光軸と成す面に垂直な夫々のレンズ又は素子の
中心を通る２点で固定される。従って投受光レンズや投
受光素子が熱膨張によって変形した場合にも投光軸，受
光軸が変動することがなく、同一の距離にある物体から
の反射光を集束すれば受光素子の同一位置で集束させる
ことができる。According to the present invention having the above features, the light receiving lens, the light projecting lens, the light receiving element, and the light projecting element are all located at the center of each lens or element perpendicular to the plane formed by the light projecting axis and the light receiving axis. Are fixed at two points passing through. Therefore, even when the light emitting and receiving lens and the light emitting and receiving element are deformed due to thermal expansion, the light emitting axis and the light receiving axis do not fluctuate. Can be focused.
【００１２】[0012]
【実施例】図１は本発明の一実施例による光学変位セン
サの光学系部分を示す斜視図である。本図において前述
した従来例とほぼ同一形状の光学ベース２１を設ける。
この光学ベース２１は図示のように投受光素子と受光レ
ンズを取付けるための部材である。光学ベース２１は投
受光軸が光学ベースの先の位置で交差するように円筒の
開口２１ａ，２１ｂが形成されている。そして投光軸２
２，受光軸２３より形成される平面に垂直で開口２１ｂ
の中心を通る線上に開口２１ｂの上下に図示のように受
光レンズ２４の取付孔２１ｃ，２１ｄを設ける。受光レ
ンズ２４も図示のようにその中心を通り上下の取付孔２
１ｃ，２１ｄの２点で固定できるようにレンズ取付孔を
有しており、この位置でねじ止めされる。その他の構造
は従来例と同様であり、投光用の開口２１ａに投光素子
１が取付けられ、その表面には投光レンズ３が取付けら
れる。又開口２１ｂの内側にはＰＳＤ６が取付けられ
る。FIG. 1 is a perspective view showing an optical system portion of an optical displacement sensor according to one embodiment of the present invention. In this figure, an optical base 21 having substantially the same shape as that of the conventional example described above is provided.
The optical base 21 is a member for mounting a light emitting and receiving element and a light receiving lens as shown. The optical base 21 is formed with cylindrical openings 21a and 21b such that the light emitting and receiving axes intersect at a position ahead of the optical base. And the projection axis 2
2. Opening 21b perpendicular to the plane formed by light receiving axis 23
The mounting holes 21c and 21d of the light receiving lens 24 are provided above and below the opening 21b on a line passing through the center of the lens 21 as shown in the figure. The light receiving lens 24 also passes through the center as shown, and
It has a lens mounting hole so that it can be fixed at two points 1c and 21d, and is screwed at this position. The other structure is the same as that of the conventional example. The light projecting element 1 is attached to the light projecting opening 21a, and the light projecting lens 3 is attached to the surface thereof. The PSD 6 is mounted inside the opening 21b.
【００１３】このように受光レンズ２４を２点で固定す
ることによって、受光レンズ２４が熱膨張しても、図１
に示す一次元のＰＳＤ６の軸方向６Ｘにはほとんど影響
を与えることがない。従って受光レンズ２４が膨張して
も結像位置が変化することはなく、ＰＳＤ６の出力が変
動することはない。ここで結像位置はＰＳＤ６の軸６Ｘ
の垂直方向には変化するが、その量はＰＳＤ６の素子幅
内に充分収まるため実用上は問題がない。このように受
光レンズ２４をその投受光軸の成す面に垂直な受光レン
ズの中心を通る２点で固定することによって、温度変化
に対して安定した光学変位センサを得ることができる。By fixing the light-receiving lens 24 at two points in this manner, even if the light-receiving lens 24 thermally expands, FIG.
Has little effect on the axial direction 6X of the one-dimensional PSD 6 shown in FIG. Therefore, even if the light receiving lens 24 expands, the image forming position does not change, and the output of the PSD 6 does not change. Here, the imaging position is the axis 6X of PSD6.
However, since the amount is sufficiently within the element width of the PSD 6, there is no practical problem. By fixing the light receiving lens 24 at two points passing through the center of the light receiving lens perpendicular to the plane formed by the light projecting and receiving axes, it is possible to obtain an optical displacement sensor that is stable against temperature changes.
【００１４】図２は本発明の他の実施例による光学系の
構成を示す斜視図である。前述した図４において投光レ
ンズ３が投受光軸の成す面上でずれた場合には、投光軸
が変動するため、ＰＳＤ６の受光位置が変化し物体が異
なった位置にあるように認識される。従って本実施例で
は投光レンズ２５も受光レンズ２４と同一形状のものを
用い、光学ベース２６にはこの投受光軸で成す面に対し
垂直で開口２１ａの中心を通る２点に開口を設け、実質
的に投光レンズ２５の中心を通る２点で投光レンズ２５
を光学ベース２１ａに固定する。こうすれば投光軸は熱
膨張による影響を受け難くなり、ＰＳＤ６上の結像位置
を安定化させることができる。FIG. 2 is a perspective view showing the structure of an optical system according to another embodiment of the present invention. In FIG. 4 described above, when the light projecting lens 3 is shifted on the plane formed by the light projecting and receiving axes, the light projecting axis fluctuates, so that the light receiving position of the PSD 6 changes and the object is recognized as being at a different position. You. Therefore, in this embodiment, the light projecting lens 25 has the same shape as the light receiving lens 24, and the optical base 26 is provided with openings at two points passing through the center of the opening 21a perpendicular to the plane formed by the light projecting and receiving axes. At two points substantially passing through the center of the light projecting lens 25, the light projecting lens 25
Is fixed to the optical base 21a. In this case, the light projection axis is less affected by the thermal expansion, and the image forming position on the PSD 6 can be stabilized.
【００１５】更に図３に示すように投光素子１，ＰＳＤ
６自体を投光素子固定用基板３１，受光素子固定用基板
３２を介して光学ベース２７に取付けるようにしてもよ
い。これらの基板３１，３２は夫々前述したように投受
光軸の成す面に垂直で開口２１ａ，２１ｂの中心を通る
上下の２点で光学ベース２７に固定するものとする。図
３は光学ベースと投受光素子を示す斜視図であって、光
学ベース２７の裏面には投光軸２２及び受光軸２３を貫
通する位置に開口２７ａ，２７ｂが設けられている。投
受光軸２２，２３に垂直で開口２１ａ，２１ｂの中心を
通る上下の各２点にはねじ孔２７ｃ，２７ｄ及び２７
ｅ，２７ｆが形成される。そして投光素子固定用基板３
１，受光素子固定用基板３２には、夫々図示のようにあ
らかじめ投光素子１及び受光素子であるＰＳＤ６を固定
しておくものとする。これらの投受光素子はその中心が
基板３１，３２の上下の開口部を貫通させるものとす
る。そして基板３１，３２の上下の開口部をねじによっ
て光学ベース２７に固定する。こうすれば投受光素子の
中心を通り投受光軸で成す面に垂直な２点で、投受光素
子１，６が夫々光学ベース２７に固定されることとな
る。Further, as shown in FIG.
6 itself may be attached to the optical base 27 via the light emitting element fixing substrate 31 and the light receiving element fixing substrate 32. As described above, these substrates 31 and 32 are fixed to the optical base 27 at two upper and lower points perpendicular to the plane formed by the light emitting and receiving axes and passing through the centers of the openings 21a and 21b. FIG. 3 is a perspective view showing the optical base and the light emitting / receiving element. Openings 27 a and 27 b are provided on the back surface of the optical base 27 at positions penetrating the light emitting axis 22 and the light receiving axis 23. Screw holes 27c, 27d and 27 are provided at upper and lower points perpendicular to the light emitting and receiving axes 22 and 23 and passing through the centers of the openings 21a and 21b.
e, 27f are formed. And the light emitting element fixing substrate 3
1. It is assumed that the light emitting element 1 and the PSD 6, which is a light receiving element, are previously fixed to the light receiving element fixing substrate 32 as shown in the drawing. The center of these light emitting and receiving elements penetrates the upper and lower openings of the substrates 31 and 32. The upper and lower openings of the substrates 31 and 32 are fixed to the optical base 27 with screws. In this way, the light emitting and receiving elements 1 and 6 are fixed to the optical base 27 at two points passing through the center of the light emitting and receiving element and perpendicular to the plane formed by the light emitting and receiving axis.
【００１６】こうすれば投光素子１やＰＳＤ６が温度に
対して温度変化によって位置ずれを起こしてもこの変化
を吸収することができ、ＰＳＤ６での結像位置の位置ず
れをなくすことができる。In this way, even if the light emitting element 1 and the PSD 6 are displaced by a change in temperature with respect to the temperature, the change can be absorbed, and the displacement of the image forming position on the PSD 6 can be eliminated.
【００１７】尚前述した各実施例はＰＳＤを受光素子と
した位置検出装置について説明しているが、２分割型フ
ォトトランジスタやＣＣＤを用いた変位センサに適用す
ることが可能である。In each of the embodiments described above, a position detecting device using a PSD as a light receiving element is described. However, the present invention can be applied to a displacement sensor using a two-segmented phototransistor or a CCD.
【００１８】[0018]
【発明の効果】以上詳細に説明したように本発明によれ
ば、投光レンズ，受光レンズが熱膨張によって変形した
場合にも投光素子，受光素子との相対的な位置関係はほ
とんど変化しない。又投光素子，受光素子が熱膨張によ
って変形した場合も投光レンズ，受光レンズとの相対的
な位置関係はほとんど変化しない。従って温度変化によ
っても受光素子上の結像位置が変化することはない。そ
れ故温度変化に対して安定性の良い光学変位センサを得
ることができるという効果が得られる。As described above in detail, according to the present invention, even when the light projecting lens and the light receiving lens are deformed by thermal expansion, the relative positional relationship between the light projecting element and the light receiving element hardly changes. . Also, when the light emitting element and the light receiving element are deformed due to thermal expansion, the relative positional relationship between the light emitting lens and the light receiving lens hardly changes. Therefore, the imaging position on the light receiving element does not change even when the temperature changes. Therefore, an effect that an optical displacement sensor having good stability against a temperature change can be obtained is obtained.
【図１】本発明の一実施例による光学変位センサの光学
系部分を示す斜視図である。FIG. 1 is a perspective view showing an optical system portion of an optical displacement sensor according to one embodiment of the present invention.
【図２】本発明の他の実施例による光学変位センサの光
学系部分を示す斜視図である。FIG. 2 is a perspective view showing an optical system portion of an optical displacement sensor according to another embodiment of the present invention.
【図３】本発明の更に他の実施例による光学変位センサ
の光学系部分を示す斜視図である。FIG. 3 is a perspective view showing an optical system portion of an optical displacement sensor according to still another embodiment of the present invention.
【図４】光学変位センサの全体構成を示すブロック図で
ある。FIG. 4 is a block diagram showing the overall configuration of the optical displacement sensor.
【図５】（ａ）は従来の光学変位センサの光学系部分を
示す斜視図、（ｂ），（ｃ）は受光素子の取付位置を示
す縦断面図である。FIG. 5A is a perspective view showing an optical system portion of a conventional optical displacement sensor, and FIGS. 5B and 5C are longitudinal sectional views showing mounting positions of light receiving elements.
１ 投光素子 ２ 投光レンズ ６ ＰＳＤ ２１，２６，２７ 光学ベース ２１ａ，２１ｂ，２７ａ，２７ｂ 開口 ２１ｃ，２１ｄ，２７ｃ〜２７ｆ ねじ孔 ２４ 受光レンズ ２５ 投光レンズ ３１ 投光素子固定用基板 ３２ 受光素子固定用基板 Reference Signs List 1 light projecting element 2 light projecting lens 6 PSD 21, 26, 27 optical base 21a, 21b, 27a, 27b opening 21c, 21d, 27c to 27f screw hole 24 light receiving lens 25 light projecting lens 31 light projecting element fixing substrate 32 light receiving Element fixing substrate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 堀井 孝佳 京都府京都市右京区花園土堂町10番地 オムロン株式会社内 (56)参考文献 特開 昭62−81523（ＪＰ，Ａ) 特開 平１−313705（ＪＰ，Ａ) 実開 昭63−122211（ＪＰ，Ｕ) 実開 平１−144803（ＪＰ，Ｕ) 実開 平３−27305（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01B 11/00 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takayoshi Horii 10 Okado Dodocho, Ukyo-ku, Kyoto, Kyoto Prefecture (56) References JP-A-62-81523 (JP, A) JP-A-1- 313705 (JP, A) Japanese Utility Model 63-122211 (JP, U) Japanese Utility Model 1-144803 (JP, U) Japanese Utility Model Application 3-27305 (JP, U) (58) Fields surveyed (Int. 7 , DB name) G01B 11/00
Claims (4)
光レンズと、 前記投光軸上の物体から反射される受光軸上の光を受光
する受光レンズと、 前記受光レンズの背後に設けられる受光素子とを具備
し、前記受光素子の受光位置に基づいて物体までの距離
を検出する光学変位センサであって、 前記受光レンズは、受光レンズの中心を通り前記投光軸
と受光軸で成す面に垂直な２点で固定したことを特徴と
する光学変位センサ。A light projecting element, a light projecting lens that converges the light of the light projecting element and projects the light along the light projecting axis, and a light on a light receiving axis reflected from an object on the light projecting axis. A light receiving lens that receives light, a light receiving element provided behind the light receiving lens, and an optical displacement sensor that detects a distance to an object based on a light receiving position of the light receiving element; An optical displacement sensor fixed at two points passing through the center of a light receiving lens and perpendicular to a plane defined by the light projecting axis and the light receiving axis.
光レンズと、 前記投光軸上の物体から反射される受光軸上の光を受光
する受光レンズと、 前記受光レンズの背後に設けられる受光素子とを具備
し、前記受光素子の受光位置に基づいて物体までの距離
を検出する光学変位センサであって、 前記投光レンズは、投光レンズの中心を通り、前記投光
軸と受光軸で成す面に垂直な２点で固定したことを特徴
とする光学変位センサ。2. A light projecting element, a light projecting lens that converges the light of the light projecting element and projects the light along the light projecting axis, and a light on a light receiving axis reflected from an object on the light projecting axis A light receiving lens that receives light, a light receiving element provided behind the light receiving lens, and an optical displacement sensor that detects a distance to an object based on a light receiving position of the light receiving element, wherein the light projecting lens is An optical displacement sensor fixed at two points passing through the center of the light projecting lens and perpendicular to a plane formed by the light projecting axis and the light receiving axis.
光レンズと、 前記投光軸上の物体から反射される受光軸上の光を受光
する受光レンズと、 前記受光レンズの背後に設けられる受光素子とを具備
し、前記受光素子の受光位置に基づいて物体までの距離
を検出する光学変位センサであって、 前記受光素子は、前記受光素子の中心を通り前記投光軸
と受光軸で成す面に垂直な２点で固定したことを特徴と
する光学変位センサ。3. A light projecting element, a light projecting lens that converges the light of the light projecting element and projects the light along the light projecting axis, and a light on a light receiving axis reflected from an object on the light projecting axis A light receiving lens that receives light, a light receiving element provided behind the light receiving lens, an optical displacement sensor that detects a distance to an object based on a light receiving position of the light receiving element, wherein the light receiving element is: An optical displacement sensor fixed at two points passing through the center of the light receiving element and perpendicular to a plane formed by the light projecting axis and the light receiving axis.
光レンズと、 前記投光軸上の物体から反射される受光軸上の光を受光
する受光レンズと、 前記受光レンズの背後に設けられる受光素子とを具備
し、前記受光素子の受光位置に基づいて物体までの距離
を検出する光学変位センサであって、 前記投光素子は、前記投光素子の中心を通り前記投光軸
と受光軸で成す面に垂直な２点で固定したことを特徴と
する光学変位センサ。4. A light projecting element, a light projecting lens for converging light of the light projecting element and projecting the light along the light projecting axis, and a light on a light receiving axis reflected from an object on the light projecting axis A light receiving lens that receives light, a light receiving element provided behind the light receiving lens, and an optical displacement sensor that detects a distance to an object based on a light receiving position of the light receiving element, wherein the light projecting element is An optical displacement sensor fixed at two points passing through the center of the light projecting element and perpendicular to a plane formed by the light projecting axis and the light receiving axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04098900A JP3144039B2 (en) | 1992-03-24 | 1992-03-24 | Optical displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04098900A JP3144039B2 (en) | 1992-03-24 | 1992-03-24 | Optical displacement sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05272918A JPH05272918A (en) | 1993-10-22 |
| JP3144039B2 true JP3144039B2 (en) | 2001-03-07 |
Family
ID=14232009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04098900A Expired - Fee Related JP3144039B2 (en) | 1992-03-24 | 1992-03-24 | Optical displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3144039B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4588544B2 (en) * | 2005-06-06 | 2010-12-01 | シャープ株式会社 | Optical distance sensor |
-
1992
- 1992-03-24 JP JP04098900A patent/JP3144039B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05272918A (en) | 1993-10-22 |
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