JP3453995B2 - Optical displacement sensor - Google Patents
Optical displacement sensorInfo
- Publication number
- JP3453995B2 JP3453995B2 JP05933196A JP5933196A JP3453995B2 JP 3453995 B2 JP3453995 B2 JP 3453995B2 JP 05933196 A JP05933196 A JP 05933196A JP 5933196 A JP5933196 A JP 5933196A JP 3453995 B2 JP3453995 B2 JP 3453995B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- lens
- glass filter
- projecting
- sensor
- 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
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、被測定物体に光ビ
ームを照射し、被測定物体からの反射光を受光すること
で、被測定物体までの距離を測定する光式変位センサに
関する。
【０００２】
【従来の技術】この種の光式変位センサは、例えば図３
に示すような概略構成である。ここに示す光式変位セン
サでは、投光素子（例えば半導体レーザ）１０の光ビー
ムを投光レンズ１１及び投光ガラスフィルタ１２を介し
て被測定物体５０に照射し、被測定物体５０からの反射
光を受光ガラスフィルタ２２及び受光レンズ２１を介し
て受光素子（例えば一次元検出素子）２０で受光するよ
うに構成されている。
【０００３】投光レンズ１１及び受光レンズ２１は、図
４に示すように、それぞれ鏡筒１３，２３内に接着さ
れ、この鏡筒１３，２３（鏡筒付きレンズ）がセンサヘ
ッド３０の所定位置に形成された円形孔４１，４２に嵌
め込まれ、ネジ孔３５，３６にネジ３７，３８を螺合す
ることでセンサヘッド３０に固定される。更に、多くの
場合、投光ガラスフィルタ１２’と受光ガラスフィルタ
２２’が、センサヘッド３０の端面にそれぞれ設けられ
た接着代（斜線部分）４３，４４を利用して接着される
ことで、鏡筒１３，２３の端面がガラスフィルタ１
２’，２２’で塞がれる。
【０００４】この投光及び受光ガラスフィルタ１２’，
２２’は、外乱光を遮断するためだけでなく、鏡筒１
３，２３内の投光及び受光レンズ１１，２１が露出した
ままでは、レンズ表面が汚れるのでレンズ表面を保護す
るために設けられる。例えば、ガラスフィルタは汚れて
も、レンズに比べて或る程度の広さの面積を有するた
め、汚れを拭き取り易い。
【０００５】
【発明が解決しようとする課題】しかしながら、ガラス
フィルタをセンサヘッドの端面に接着する作業は、余り
容易なものではない。例えば、ガラスフィルタの内側
（レンズ対向側）を汚したままセンサヘッド３０の端面
に接着すると、後から汚れを拭き取ることができないた
め、ガラスフィルタの接着には慎重な作業が必要とな
る。又、接着には、接着剤を使用する場合や、両面テー
プを使用する場合があるが、いずれの場合も組立作業は
容易ではない。
【０００６】従って、本発明は、そのような問題点に着
目してなされたもので、レンズとガラスフィルタを設け
る鏡筒の組立を容易にし、それによりセンサ全体の組立
工程をスムーズなものとする光式変位センサを提供する
ことを目的とする。
【０００７】
【課題を解決するための手段】前記目的を達成するため
に、本発明の光式変位センサは、センサヘッドに、投光
素子からの光ビームを投光レンズ及び投光ガラスフィル
タを介して被測定物体に投光する投光手段と、被測定物
体からの反射光を受光ガラスフィルタ及び受光レンズを
介して受光する受光手段と、受光手段の出力に基づいて
被測定物体までの距離を測定する演算手段とを備えるも
のにおいて、前記投光レンズと受光レンズをそれぞれ異
なる鏡筒内に接着し、各鏡筒の端面にそれぞれ対応のガ
ラスフィルタを接着し、このレンズとガラスフィルタが
接着一体化された各鏡筒をそれぞれ前記センサヘッドに
形成した孔に嵌め込んで取付けたことを特徴とする。
【０００８】この光式変位センサでは、内部にレンズが
接着された鏡筒の端面に予めガラスフィルタを接着し
て、鏡筒にガラスフィルタを一体化しておき、このガラ
スフィルタ付きの鏡筒をセンサヘッドの孔に嵌め込んで
取付ける。従って、汚れに対して細心の注意を必要とす
るガラスフィルタの接着工程を前もって行っておけるの
で、ガラスフィルタの接着工程に手間や時間を掛けるこ
となく、センサ全体の組立工程をスムーズに行うことが
できる。
【０００９】
【発明の実施の形態】以下、本発明を実施の形態に基づ
いて説明する。なお、本発明は予め鏡筒の端面にガラス
フィルタを接着したことが特徴であり、その他の構成は
従来と同様であるので、同じ要素には同一符号を付して
ある。図１に、その一実施形態に係るセンサヘッドとガ
ラスフィルタ付き鏡筒との部分省略斜視図を示す。この
実施形態では、投光側の鏡筒１３は、図２に断面図で示
すように、内部に投光レンズ１１が接着されると共に、
端面に投光ガラスフィルタ１２が接着されて、投光レン
ズ１１と投光ガラスフィルタ１２が一体化されたもので
ある。勿論、受光側の鏡筒２３も同様の構造である。
【００１０】センサヘッド３０は、その端面に鏡筒１
３，２３を嵌め込む円形孔４１，４２を有し、この円形
孔４１，４２に鏡筒１３，２３を嵌め込んだ状態で、鏡
筒１３，２３の端面のガラスフィルタ１２，２２がセン
サヘッド３０の端面に位置するように設定されている。
鏡筒１３，２３は、センサヘッド３０のネジ孔３５，３
６に螺合されるネジ３７，３８により円形孔４１，４２
に固定される。
【００１１】このように予めガラスフィルタ１２，２２
を鏡筒１３，２３の端面に接着して一体化しておくこと
で、つまりガラスフィルタ付きの鏡筒を組み立てておく
ことで、接着の工程（レンズの接着とガラスフィルタの
接着の工程）を、センサ全体の組立工程と分離すること
ができるので、センサ全体の組立工程をスムーズなもの
とすることができる。又、図４の従来例と比較しても分
かるように、センサヘッド３０の端面にガラスフィルタ
１２，２２を接着するための接着代（斜線部分）４３，
４４を設ける必要がないので、ガラスフィルタ１２，２
２も小さくて済むし、その分だけセンサの外形を小さく
することができる。
【００１２】なお、光式変位センサ全体の構成は、例え
ば従来と同様に図３に示す通りである。即ち、投光素子
１０からの光ビームは、投光レンズ１１及び投光ガラス
フィルタ１２を経て被測定物体５０に照射され、被測定
物体５０からの反射光は、受光ガラスフィルタ２２及び
受光レンズ２１を経て受光素子２０で受光される。投光
素子１０は投光素子保持基材１５に取付けられ、光ビー
ムの投光が投光回路基板１６により制御される。受光素
子２０は受光素子保持基材２５に取付けられ、受光信号
が受光回路基板２６に入力され、更に演算回路（演算手
段）３１により被測定物体５０までの距離が算出され、
その変位データが出力される。
【００１３】
【発明の効果】以上説明したように、本発明の光式変位
センサによれば、予め鏡筒の端面にガラスフィルタを接
着してレンズと共に一体化してあるので、センサ全体の
組立工程時には、ガラスフィルタ付きの鏡筒をセンサヘ
ッドの所定箇所に取付けるだけでよく、組立工程の際に
面倒なガラスフィルタの接着工程は不要となる。従っ
て、汚れに対して細心の注意を必要とする接着工程を、
センサ本体の組立工程とは分離することができるので、
センサ全体の組立工程がスムーズになる。
【００１４】又、従来はセンサヘッドの端面にガラスフ
ィルタを接着するための接着代を設ける必要があるの
で、それだけセンサの外形が大きくなるが、本発明で
は、そのような接着代が不要であるので、センサ全体の
外形を小さくすることができる。
【００１５】Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of irradiating an object to be measured with a light beam and receiving reflected light from the object to be measured, thereby obtaining a distance to the object to be measured. The present invention relates to an optical displacement sensor for measuring the displacement. 2. Description of the Related Art This type of optical displacement sensor is, for example, shown in FIG.
It is a schematic configuration as shown in FIG. In the optical displacement sensor shown here, a light beam of a light projecting element (for example, a semiconductor laser) 10 is applied to an object 50 to be measured via a light projecting lens 11 and a light projecting glass filter 12 and reflected from the object 50 to be measured. The light is received by a light receiving element (for example, a one-dimensional detection element) 20 via a light receiving glass filter 22 and a light receiving lens 21. The light projecting lens 11 and the light receiving lens 21 are adhered inside lens barrels 13 and 23, respectively, as shown in FIG. Are fixed to the sensor head 30 by screwing the screws 37 and 38 into the screw holes 35 and 36. Further, in many cases, the light-transmitting glass filter 12 ′ and the light-receiving glass filter 22 ′ are bonded by using bonding margins (hatched portions) 43 and 44 provided on the end surfaces of the sensor head 30, respectively. The end faces of the tubes 13 and 23 are glass filters 1
Blocked at 2 ', 22'. The light transmitting and receiving glass filters 12 ',
22 ′ is not only for blocking disturbance light, but also for the lens barrel 1
If the light projecting and light receiving lenses 11 and 21 in the lenses 3 and 23 are left exposed, the lens surfaces are soiled, so that they are provided to protect the lens surfaces. For example, even if the glass filter becomes dirty, it has a certain area as compared with the lens, so that it is easy to wipe off the dirt. [0005] However, the work of bonding the glass filter to the end face of the sensor head is not very easy. For example, if the inside of the glass filter (the side facing the lens) is soiled and adhered to the end face of the sensor head 30, the dirt cannot be wiped off later, so a careful operation is required to adhere the glass filter. In addition, there are cases where an adhesive is used and a case where a double-sided tape is used for bonding, but the assembling work is not easy in any case. Accordingly, the present invention has been made in view of such a problem, and makes it easy to assemble a lens barrel provided with a lens and a glass filter, thereby facilitating an assembling process of the entire sensor. An object of the present invention is to provide an optical displacement sensor. In order to achieve the above object, an optical displacement sensor according to the present invention comprises a sensor head having a light projecting lens for projecting a light beam from a light projecting element and a light projecting glass filter. A light projecting means for projecting light to the object to be measured through the light receiving means, a light receiving means for receiving light reflected from the object to be measured through the light receiving glass filter and the light receiving lens, and a distance to the object to be measured based on an output of the light receiving means And a calculating means for measuring the light intensity, wherein the light projecting lens and the light receiving lens are different from each other.
Comprising a mirror adhered to the tube, bonding the glass filter corresponding to the end face of the lens barrel, the lens and the glass filter with each barrel, which is integrally bonded to each of the sensor heads
It is characterized by being fitted into the formed hole and attached. In this optical displacement sensor, a glass filter is previously bonded to an end surface of a lens barrel having a lens bonded therein, and the glass filter is integrated with the lens barrel. Fit it into the hole in the head. Therefore, since the glass filter bonding process that requires careful attention to dirt can be performed in advance, the entire sensor assembly process can be performed smoothly without taking time and effort in the glass filter bonding process. it can. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on embodiments. It should be noted that the present invention is characterized in that a glass filter is bonded in advance to the end surface of the lens barrel, and the other components are the same as those of the related art. FIG. 1 is a partially omitted perspective view of a sensor head and a lens barrel with a glass filter according to the embodiment. In this embodiment, as shown in the sectional view of FIG. 2, the projection lens 11 is bonded inside the lens barrel 13 on the light projection side,
The light projecting glass filter 12 is adhered to the end face, and the light projecting lens 11 and the light projecting glass filter 12 are integrated. Of course, the lens barrel 23 on the light receiving side has the same structure. The sensor head 30 has a lens barrel 1 on its end face.
In the state where the lens barrels 13 and 23 are fitted in the circular holes 41 and 42, the glass filters 12 and 22 on the end faces of the lens barrels 13 and 23 are used as sensor heads. 30 are set.
The lens barrels 13 and 23 are screw holes 35 and 3 of the sensor head 30.
Circular holes 41, 42 by screws 37, 38 screwed into
Fixed to As described above, the glass filters 12 and 22 are
Is bonded to the end surfaces of the lens barrels 13 and 23 to be integrated, that is, by assembling a lens barrel with a glass filter, the bonding step (the step of bonding the lens and the step of bonding the glass filter) is performed. Since the process of assembling the entire sensor can be separated, the process of assembling the entire sensor can be made smooth. Further, as can be seen from comparison with the conventional example of FIG. 4, an adhesion margin (hatched portion) 43 for adhering the glass filters 12 and 22 to the end face of the sensor head 30.
Since there is no need to provide 44, the glass filters 12, 2
2 can be reduced, and the outer shape of the sensor can be reduced accordingly. The overall configuration of the optical displacement sensor is, for example, as shown in FIG. That is, the light beam from the light projecting element 10 is applied to the measured object 50 through the light projecting lens 11 and the light projecting glass filter 12, and the reflected light from the measured object 50 is reflected by the light receiving glass filter 22 and the light receiving lens 21. , And is received by the light receiving element 20. The light projecting element 10 is mounted on a light projecting element holding base material 15, and the light projecting of the light beam is controlled by a light projecting circuit board 16. The light receiving element 20 is attached to the light receiving element holding base material 25, a light receiving signal is input to the light receiving circuit board 26, and a calculation circuit (calculation means) 31 calculates a distance to the measured object 50.
The displacement data is output. As described above, according to the optical displacement sensor of the present invention, since the glass filter is bonded to the end surface of the lens barrel in advance and integrated with the lens, the assembling process of the entire sensor is performed. In some cases, it is only necessary to attach a lens barrel with a glass filter to a predetermined portion of the sensor head, and a complicated glass filter bonding step is not required during the assembling step. Therefore, the bonding process that requires careful attention to dirt,
Since it can be separated from the assembly process of the sensor body,
The assembly process of the entire sensor becomes smooth. Further, conventionally, it is necessary to provide a bonding margin for bonding the glass filter to the end face of the sensor head, so that the outer shape of the sensor is correspondingly increased. However, such a bonding margin is not required in the present invention. Therefore, the outer shape of the entire sensor can be reduced. [0015]
【図面の簡単な説明】
【図１】一実施形態に係るセンサヘッドとガラスフィル
タ付き鏡筒を示す部分省略斜視図である。
【図２】図１のガラスフィルタ付き鏡筒の断面図であ
る。
【図３】光式変位センサの概略構成を示す図である。
【図４】従来例に係るセンサヘッドとガラスフィルタと
鏡筒を示す部分省略斜視図である。
【符号の説明】
１０ 投光素子
１１ 投光レンズ
１２ 投光ガラスフィルタ
１３ 鏡筒
２０ 受光素子
２１ 受光レンズ
２２ 受光ガラスフィルタ
２３ 鏡筒
３０ センサヘッド
５０ 被測定物体BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially omitted perspective view showing a sensor head and a barrel with a glass filter according to an embodiment. FIG. 2 is a sectional view of the lens barrel with a glass filter of FIG. FIG. 3 is a diagram showing a schematic configuration of an optical displacement sensor. FIG. 4 is a partially omitted perspective view showing a sensor head, a glass filter, and a lens barrel according to a conventional example. [Description of Signs] 10 Projecting element 11 Projecting lens 12 Projecting glass filter 13 Lens tube 20 Receiving element 21 Receiving lens 22 Receiving glass filter 23 Lens tube 30 Sensor head 50 Object to be measured
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大槻 真也 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 平５−107063（ＪＰ，Ａ) 特開 平６−76704（ＪＰ，Ａ) 実開 平３−53726（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G01B 11/00 - 11/30 G01C 3/00 - 3/32 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinya Otsuki 10 Okado Dodocho, Ukyo-ku, Kyoto, Kyoto Prefecture (56) References JP-A-5-107063 (JP, A) JP-A-6-106 76704 (JP, A) Japanese Utility Model 3-53726 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) G01B 11/00-11/30 G01C 3/00-3/32
Claims (1)
を投光レンズ及び投光ガラスフィルタを介して被測定物
体に投光する投光手段と、被測定物体からの反射光を受
光ガラスフィルタ及び受光レンズを介して受光する受光
手段と、受光手段の出力に基づいて被測定物体までの距
離を測定する演算手段とを備える光式変位センサにおい
て、 前記投光レンズと受光レンズをそれぞれ異なる鏡筒内に
接着し、各鏡筒の端面にそれぞれ対応のガラスフィルタ
を接着し、このレンズとガラスフィルタが接着一体化さ
れた各鏡筒をそれぞれ前記センサヘッドに形成した孔に
嵌め込んで取付けたことを特徴とする光式変位センサ。(57) [Claim 1] A light projecting means for projecting a light beam from a light projecting element to an object to be measured through a light projecting lens and a light projecting glass filter. A light-receiving unit that receives light reflected from the measurement object through a light-receiving glass filter and a light-receiving lens, and an optical displacement sensor that includes an arithmetic unit that measures a distance to the measured object based on an output of the light-receiving unit; a light projecting lens receiving lens bonded to different lens barrel, a glass filter corresponding to the end face of the barrel
Bonding the, in a hole the lens and the glass filter was formed of each barrel is integrally bonded to each of the sensor heads
An optical displacement sensor which is fitted and mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05933196A JP3453995B2 (en) | 1996-03-15 | 1996-03-15 | Optical displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05933196A JP3453995B2 (en) | 1996-03-15 | 1996-03-15 | Optical displacement sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09250903A JPH09250903A (en) | 1997-09-22 |
| JP3453995B2 true JP3453995B2 (en) | 2003-10-06 |
Family
ID=13110256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05933196A Expired - Fee Related JP3453995B2 (en) | 1996-03-15 | 1996-03-15 | Optical displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3453995B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4837277B2 (en) * | 2004-11-30 | 2011-12-14 | シャープ株式会社 | Ranging sensor and equipment equipped with it |
| JP2011106896A (en) * | 2009-11-16 | 2011-06-02 | Mitsutoyo Corp | Non-contact probe and measuring machine |
| WO2016079870A1 (en) * | 2014-11-21 | 2016-05-26 | 富士通株式会社 | Water amount measurement device and water amount monitoring system |
-
1996
- 1996-03-15 JP JP05933196A patent/JP3453995B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09250903A (en) | 1997-09-22 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |