JP2983183B2 - Emitter / receiver sensor - Google Patents
Emitter / receiver sensorInfo
- Publication number
- JP2983183B2 JP2983183B2 JP9058589A JP5858997A JP2983183B2 JP 2983183 B2 JP2983183 B2 JP 2983183B2 JP 9058589 A JP9058589 A JP 9058589A JP 5858997 A JP5858997 A JP 5858997A JP 2983183 B2 JP2983183 B2 JP 2983183B2
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- light
- receiving
- lens
- convex lens
- 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
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、投光部、受光部を
一体化した投受光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 a light emitting and receiving sensor in which a light emitting part and a light receiving part are integrated.
【０００２】[0002]
【従来の技術】従来から、投受光センサは物体の存在の
確認や物体の表面性状の識別等の各種用途において広く
用いられている。2. Description of the Related Art Hitherto, light emitting / receiving sensors have been widely used in various applications such as confirmation of the presence of an object and identification of the surface properties of the object.
【０００３】[0003]
【発明が解決しようとする課題】しかし、投光部、受光
部を一体型とし、投射光と反射光とをほぼ同じ光軸を用
いて投射、受光するものは少ない。従って、物体に対し
投光部と受光部の光軸を或る角度広げなければならない
ために、特に近距離の物体に対してはその角度を正確に
調整しなければならないなどの不都合がある。However, there are few devices in which the light projecting portion and the light receiving portion are integrated, and the projected light and the reflected light are projected and received using substantially the same optical axis. Therefore, since the optical axes of the light projecting unit and the light receiving unit must be widened by a certain angle with respect to the object, there is an inconvenience that the angle must be accurately adjusted especially for an object at a short distance.
【０００４】本発明の目的は、上述の欠点を解消し、ほ
ぼ同じ光軸を用いて投受光する一体型の投受光センサを
提供することにある。An object of the present invention is to solve the above-mentioned drawbacks and to provide an integrated light emitting and receiving sensor that emits and receives light using substantially the same optical axis.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
の本発明に係る投受光センサは、凸レンズから成る投受
光レンズの後方に、該投受光レンズ上の異なる第１、第
２の領域のそれぞれに中心線を有する第１、第２の凸レ
ンズを配置し、前記第１の凸レンズの光軸上に発光素子
を配置し、前記第２の凸レンズの光軸上に光電変換素子
を配置し、前記物体の表面に関し前記発光素子と光電変
換素子とを共役関係とし、前記発光素子からの出射光を
前記第１の凸レンズ、前記投受光レンズを介して前記物
体に投影し、前記物体からの反射光を前記投受光レン
ズ、前記第２の凸レンズを介して前記光電変換素子で受
光するようにした投受光センサであって、前記発光素子
と光電変換素子を基体１内に収納し、該基体から前方に
延出すると共に前記第１、第２の凸レンズの光軸間に位
置する遮光板を設け、前記投受光レンズを前記遮光板の
先端に固定したことを特徴とする。According to the present invention, there is provided a light emitting and receiving sensor according to the present invention, wherein a different first and second area on the light emitting and receiving lens is provided behind the light emitting and receiving lens comprising a convex lens. First and second convex lenses each having a center line are arranged, a light emitting element is arranged on the optical axis of the first convex lens, and a photoelectric conversion element is arranged on the optical axis of the second convex lens. The light emitting element and the photoelectric conversion element have a conjugate relationship with respect to the surface of the object, and the light emitted from the light emitting element is projected on the object via the first convex lens and the light emitting / receiving lens, and reflected from the object. A light emitting and receiving sensor configured to receive light by the photoelectric conversion element via the light emitting and receiving lens and the second convex lens, wherein the light emitting element and the photoelectric conversion element are housed in a base body 1, and Extending forward and said 1, a light shielding plate is provided located between the optical axis of the second lens, characterized in that the light projecting and receiving lenses is fixed to the tip of the light shielding plate.
【０００６】[0006]
【発明の実施の形態】本発明を図示の実施例に基づいて
詳細に説明する。図１は円筒状のカバーを取り外した状
態の斜視図、図２は光学的構成図であり、基体１から合
成樹脂製の黒塗りの遮光板２が延出されており、その先
端に合成樹脂製のレンズ体３が取り付けられている。レ
ンズ体３の先端面は遮光板２の中心部を通る中心線を光
軸O1とする凸レンズから成る投受光レンズ４とされ、基
体１側の面は遮光板２の両側で光軸を別個とする第１、
第２の凸レンズ５、６とされ、これらの第１、第２の凸
レンズ５、６の光軸O2、O3は投受光レンズ４の光軸O1と
平行とされ、これらの光軸O2、O3は投受光レンズ４上の
異なる２つの領域をそれぞれ通り、基体１に設けられた
２つの孔部７、８をそれぞれ通っている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiment. FIG. 1 is a perspective view showing a state in which a cylindrical cover is removed, and FIG. 2 is an optical configuration diagram. A blackened light-shielding plate 2 made of synthetic resin is extended from a base 1, and a synthetic resin Lens body 3 is attached. The front end surface of the lens body 3 is a light projecting / receiving lens 4 composed of a convex lens having an optical axis O1 at a center line passing through the center of the light shielding plate 2. The first to do
The first and second convex lenses 5 and 6 have optical axes O2 and O3 parallel to the optical axis O1 of the light projecting and receiving lens 4, and these optical axes O2 and O3 are It passes through two different areas on the light emitting and receiving lens 4, and passes through two holes 7, 8 provided in the base 1.
【０００７】基体１の孔部７及び８内の第１、第２の凸
レンズ５及び６の焦点位置には、それぞれレーザー光源
から成る発光素子９及び光電変換素子１０が配置されて
いる。そして、これらの発光素子９、各光電変換素子１
０は基体１の後部に設けられた回路１１に接続され、発
光素子９から出射する投射光は周波数変調されている。At the focal positions of the first and second convex lenses 5 and 6 in the holes 7 and 8 of the base 1, a light emitting element 9 and a photoelectric conversion element 10 each comprising a laser light source are arranged. These light emitting elements 9 and each photoelectric conversion element 1
Numeral 0 is connected to a circuit 11 provided at the rear of the base 1, and the projection light emitted from the light emitting element 9 is frequency-modulated.
【０００８】発光素子９から周波数変調された投射光
は、第１の凸レンズ５に入射して平行光となり、投受光
レンズ４を経て投受光レンズ４の焦点位置である物体Ｓ
に至り、その反射光は投受光レンズ４に戻って平行光と
なり、その一部は第２の凸レンズ６を経て光電変換素子
１０に結像するので、この光電変換素子１０の出力を得
ることにより物体を確認できる。この際に、光電変換素
子１０に投射光による反射光以外の外光が入射しても、
投射光は周波数変調しているために外光との判別は容易
である。The projection light frequency-modulated from the light emitting element 9 is incident on the first convex lens 5 and becomes parallel light.
The reflected light returns to the light projecting / receiving lens 4 and becomes parallel light, and a part of the reflected light passes through the second convex lens 6 to form an image on the photoelectric conversion element 10. Therefore, by obtaining the output of the photoelectric conversion element 10, You can see the object. At this time, even if external light other than the reflected light by the projection light is incident on the photoelectric conversion element 10,
Since the projection light is frequency-modulated, it can be easily distinguished from external light.
【０００９】遮光板２は出射光と反射光が投受光センサ
内でフレア光とならないようにするために好適であり、
またこの使用によりレンズ体３と発光素子９、光電変換
素子１０との関係を位置決めも容易となる。The light shielding plate 2 is suitable for preventing emitted light and reflected light from becoming flare light in the light emitting / receiving sensor.
Further, by using this, positioning of the relationship between the lens body 3 and the light emitting element 9 and the photoelectric conversion element 10 becomes easy.
【００１０】また、発光素子９、光電変換素子１０は必
ずしも第１、第２の凸レンズ５、６の焦点位置に配置す
ることに限定されるものではなく、物体Ｓの表面に関し
て発光素子９と光電変換素子１０とが共役関係となって
いればよい。Further, the light emitting element 9 and the photoelectric conversion element 10 are not necessarily limited to being disposed at the focal positions of the first and second convex lenses 5 and 6, and the light emitting element 9 and the photoelectric It is only necessary that the conversion element 10 has a conjugate relationship.
【００１１】なお、投受光レンズ４は図３に示すよう
に、それぞれ凸レンズ５、６を有する２つに分割したレ
ンズ体３ａ、３ｂとして遮光板２に貼り付けてもよい。As shown in FIG. 3, the light projecting / receiving lens 4 may be affixed to the light shielding plate 2 as two divided lens bodies 3a and 3b having convex lenses 5 and 6, respectively.
【００１２】[0012]
【発明の効果】以上説明したように本発明に係る投受光
センサは、投光部、受光部を遮光板を介して一体とし、
製作が容易であり、かつ物体上の所定の個所による反射
光を正確に得ることができる。As described above, in the light emitting and receiving sensor according to the present invention, the light emitting part and the light receiving part are integrated via the light shielding plate,
It is easy to manufacture, and it is possible to accurately obtain reflected light at a predetermined location on an object.
【図１】実施例の斜視図である。FIG. 1 is a perspective view of an embodiment.
【図２】光学的構成図である。FIG. 2 is an optical configuration diagram.
【図３】変形例の斜視図である。FIG. 3 is a perspective view of a modification.
１ 基体 ２ 遮光板 ３、３ａ、３ｂ レンズ体 ４ 投受光レンズ ５、６ 凸レンズ ９ 発光素子 １０ 光電変換素子 REFERENCE SIGNS LIST 1 base 2 light-shielding plate 3, 3 a, 3 b lens body 4 light-emitting / receiving lens 5, 6 convex lens 9 light-emitting element 10 photoelectric conversion element
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G01V 8/12 G01J 1/02 ──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. 6 , DB name) G01V 8/12 G01J 1/02
Claims (4)
に、該投受光レンズ上の異なる第１、第２の領域のそれ
ぞれに中心線を有する第１、第２の凸レンズを配置し、
前記第１の凸レンズの光軸上に発光素子を配置し、前記
第２の凸レンズの光軸上に光電変換素子を配置し、前記
物体の表面に関し前記発光素子と光電変換素子とを共役
関係とし、前記発光素子からの出射光を前記第１の凸レ
ンズ、前記投受光レンズを介して前記物体に投影し、前
記物体からの反射光を前記投受光レンズ、前記第２の凸
レンズを介して前記光電変換素子で受光するようにした
投受光センサであって、前記発光素子と光電変換素子を
基体１内に収納し、該基体から前方に延出すると共に前
記第１、第２の凸レンズの光軸間に位置する遮光板を設
け、前記投受光レンズを前記遮光板の先端に固定したこ
とを特徴とする投受光センサ。Behind the 1. A light projecting and receiving lenses consisting of a convex lens, a first different on-projecting light receiving lens, that of the second region
Place the first, second convex lens having a center line, respectively,
A light emitting element is arranged on the optical axis of the first convex lens, a photoelectric conversion element is arranged on the optical axis of the second convex lens, and the light emitting element and the photoelectric conversion element are conjugated with respect to the surface of the object. Projecting outgoing light from the light emitting element onto the object through the first convex lens and the light emitting / receiving lens, and reflecting light from the object through the light emitting / receiving lens and the second convex lens. Conversion element to receive light
A light emitting and receiving sensor, wherein the light emitting element and the photoelectric conversion element are
It is housed in the base 1, extends forward from the base, and
A light shielding plate is provided between the optical axes of the first and second convex lenses.
A light emitting and receiving sensor, wherein the light emitting and receiving lens is fixed to a tip of the light shielding plate .
点位置に配置し、前記光電変換素子は前記第２の凸レン
ズの焦点位置に配置した請求項１に記載の投受光セン
サ。2. The light emitting and receiving sensor according to claim 1, wherein the light emitting element is arranged at a focal position of the first convex lens, and the photoelectric conversion element is arranged at a focal position of the second convex lens.
光とした請求項１に記載の投受光センサ。3. The light emitting / receiving sensor according to claim 1, wherein the light projected from the light emitting element is frequency modulated light.
ンズとを一体的に形成した請求項１に記載の投受光セン
サ。4. The light emitting and receiving sensor according to claim 1, wherein the light emitting and receiving lens and the first and second lenses are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9058589A JP2983183B2 (en) | 1997-02-27 | 1997-02-27 | Emitter / receiver sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9058589A JP2983183B2 (en) | 1997-02-27 | 1997-02-27 | Emitter / receiver sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10239449A JPH10239449A (en) | 1998-09-11 |
| JP2983183B2 true JP2983183B2 (en) | 1999-11-29 |
Family
ID=13088679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9058589A Expired - Fee Related JP2983183B2 (en) | 1997-02-27 | 1997-02-27 | Emitter / receiver sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2983183B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7129508B2 (en) | 2002-01-18 | 2006-10-31 | Honeywell International Inc. | Compact VCSEL sensor with multiple sensing capabilities |
| US7540001B2 (en) | 2003-10-03 | 2009-05-26 | Sony Corporation | Apparatus for and method of mounting disks having different diameters |
| WO2008145972A1 (en) * | 2007-05-26 | 2008-12-04 | Norman Matheson Lindsay | Electro-optical sensors |
-
1997
- 1997-02-27 JP JP9058589A patent/JP2983183B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10239449A (en) | 1998-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB2107897A (en) | Optical automatic critical focusing device | |
| KR20010041694A (en) | Optical sensor system for detecting the position of an object | |
| KR100470235B1 (en) | Light projection device for a photoelectric smoke sensor | |
| JPS6220522B2 (en) | ||
| JP2983183B2 (en) | Emitter / receiver sensor | |
| JP2690642B2 (en) | Scanning optical system | |
| JP2005503702A (en) | Optical system, optical element, and user unit for illuminating a subject for imaging | |
| US5159378A (en) | Light projector for range finding device | |
| JP2983182B2 (en) | Emitter / receiver sensor | |
| JPS59125709A (en) | Arranging structure of lens of limited reflection type photoelectric switch | |
| JP2711191B2 (en) | Uneven pattern reading device | |
| JP2588667Y2 (en) | Reflective photo sensor | |
| KR920008507B1 (en) | Optical pattern detection apparatus | |
| US4592637A (en) | Focus detecting device | |
| JPS6342761B2 (en) | ||
| JP2776715B2 (en) | Optical reader | |
| US6010229A (en) | Device for enhancing and shielding the light emitted from a rod-shaped light source for image scanner with charge coupled device | |
| JPH0142229Y2 (en) | ||
| JPH0128407Y2 (en) | ||
| JPS6239469Y2 (en) | ||
| JP3377976B2 (en) | Parallel light emitting device | |
| JPH06331732A (en) | Optical distance sensor | |
| JPH0714810Y2 (en) | Rangefinder | |
| JP2503523Y2 (en) | Active ranging device | |
| JPH0252176U (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |