JP3146453B2 - Reflective photo sensor - Google Patents

Reflective photo sensor

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Publication number
JP3146453B2
JP3146453B2 JP34954595A JP34954595A JP3146453B2 JP 3146453 B2 JP3146453 B2 JP 3146453B2 JP 34954595 A JP34954595 A JP 34954595A JP 34954595 A JP34954595 A JP 34954595A JP 3146453 B2 JP3146453 B2 JP 3146453B2
Authority
JP
Japan
Prior art keywords
light
lens
light receiving
emitting element
case
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
Application number
JP34954595A
Other languages
Japanese (ja)
Other versions
JPH09178551A (en
Inventor
雅彦 村山
光昭 三杉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Priority to JP34954595A priority Critical patent/JP3146453B2/en
Publication of JPH09178551A publication Critical patent/JPH09178551A/en
Application granted granted Critical
Publication of JP3146453B2 publication Critical patent/JP3146453B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、常時に投光部から
ビーム状の光を投光しておき、披検出体が接近したとき
には、その披検出体からの反射光を受光部で受け、反射
光のレベルが所定値以上であるときには披検出体の存在
を検知する反射型ホト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 unit which constantly emits a beam of light from a light emitting unit, and when a detected object approaches, receives reflected light from the detected object at a light receiving unit. The present invention relates to a reflection type photosensor for detecting the presence of a detection object when the level of reflected light is equal to or higher than a predetermined value.

【0002】[0002]

【従来の技術】従来のこの種の反射型ホトセンサ90の
構成の例を示すものが図6であり、この反射型ホトセン
サ90は、投光部91と受光部92と検出回路93とで
構成され、投光部91はLEDなどの発光素子91aと
レンズ91bで構成され、受光部92はホトダイオード
などの受光素子92aとレンズ92bとで構成されてい
る。
2. Description of the Related Art FIG. 6 shows an example of the structure of a conventional reflection type photo sensor 90 of this type. This reflection type photo sensor 90 is composed of a light projecting section 91, a light receiving section 92 and a detection circuit 93. The light projecting unit 91 includes a light emitting element 91a such as an LED and a lens 91b, and the light receiving unit 92 includes a light receiving element 92a such as a photodiode and a lens 92b.

【0003】また、検出回路93には、一方の入力端子
に抵抗器R1 と抵抗器R2 とで設定される基準電圧が印
加されるコンパレータ93aが設けられ、アースE側に
可変抵抗器VRが接続された前記受光素子92aからの
出力が前記コンパレータ93aの他の一方の入力端子に
接続されている。
[0003] Also, the detection circuit 93 includes a comparator 93a is provided a reference voltage set by the one input terminal and the resistor R 1 and the resistor R 2 is applied, a variable resistor VR to ground E side Is connected to the other input terminal of the comparator 93a.

【0004】このときに、前記投光部91と受光部92
とは略同一方向に投光方向と受光方向とが成るように設
置されているので、披検出体Xが存在しないときには受
光素子92aに出力を生じることはなく、従って、前記
コンパレータ93aの出力端子OUTに出力を生じるこ
とはない。
At this time, the light projecting portion 91 and the light receiving portion 92
Are arranged so that the light projecting direction and the light receiving direction are substantially in the same direction. Therefore, when the detection object X is not present, no output is generated at the light receiving element 92a. Therefore, the output terminal of the comparator 93a is not generated. There is no output at OUT.

【0005】そして、披検出体Xが予めに設定された距
離よりも近い距離に出現すると、この披検出体Xからの
反射光が受光部92に達し、受光素子92aに基準電圧
を越える出力を生じて、その出力が印加されるコンパレ
ータ93aの出力端子OUTに出力を生じさせ披検出体
Xの存在を検知するものとなる。
When the detection object X appears at a distance shorter than a preset distance, the reflected light from the detection object X reaches the light receiving section 92, and the output exceeding the reference voltage is applied to the light receiving element 92a. Then, an output is generated at the output terminal OUT of the comparator 93a to which the output is applied, and the presence of the detection object X is detected.

【0006】ここで、前記反射型ホトセンサ90におい
ては、発光素子91aの光量、および、受光素子92a
の感度には相当量の個体差があり、よって、従来の反射
型ホトセンサ90では前記検出回路93中に可変抵抗器
VRが設けられ、この可変抵抗器VRの抵抗値を調整す
ることで、上記の両素子91a、92aの個体差の補正
が行われている。
Here, in the reflection type photo sensor 90, the light amount of the light emitting element 91a and the light receiving element 92a
Has a considerable amount of individual difference. Therefore, in the conventional reflection-type photosensor 90, a variable resistor VR is provided in the detection circuit 93. By adjusting the resistance value of the variable resistor VR, The correction of the individual difference between the two elements 91a and 92a is performed.

【0007】[0007]

【発明が解決しようとする課題】しかしながら、前記し
た従来の反射型ホトセンサ90に含まれる可変抵抗器V
Rは温度、湿度などに対する耐久性が比較的に低く、ま
た、振動などにより設定した抵抗値に変化を生じ易いも
のであるので、前記反射型ホトセンサ90を、例えば屋
外に設置される自動販売機など、温度変化も激しく、高
湿度を受け易く、且つ、振動も激しい機器に取付けた場
合には可変抵抗器VRに生じる劣化、変動などにより、
反射型ホトセンサ90全体が比較的に短時間で性能の低
下を来し信頼性を損なうものとなり、この点の解決が課
題とされるものとなっていた。
However, the variable resistor V included in the conventional reflection type photosensor 90 described above.
R is relatively low in durability against temperature, humidity, and the like, and easily changes a resistance value set by vibration or the like. Therefore, the reflection-type photosensor 90 is used, for example, in a vending machine installed outdoors. The temperature change is severe, it is easy to receive high humidity, and when it is attached to the equipment that violently vibrates, the deterioration and fluctuation of the variable resistor VR may cause
The performance of the entire reflection type photosensor 90 deteriorates in a relatively short period of time, and the reliability is impaired, and solving this point has been an issue.

【0008】[0008]

【課題を解決するための手段】本発明は、前記した従来
の課題を解決するための具体的な手段として、発光素子
とレンズとで成る投光部と、受光素子とレンズとで成る
受光部と、該受光部の出力から披検出体の有無を判定す
る検出回路とから成り、前記発光素子および受光素子の
個体差を補正する感度調整手段が設けられて成る反射型
ホトセンサにおいて、前記感度調整手段は、前記投光部
と受光部との何れか一方に設けられた光学式絞り装置で
あり、該光学絞り装置は、前記発光素子または受光素子
とレンズとを所定の間隔をもって取付けたケースと、一
方の端部に回転軸が設けられてケース内を回動自在に軸
止された絞り板とから成り、前記絞り板は回転軸と反対
側の端部に突起が設けられ、前記ケースには前記回転軸
を中心とする円弧状に複数の調整孔が設けられ、該調整
孔の何れかに前記絞り板の突起を挿入することで、発光
素子または受光素子との間の光路を暫時に遮蔽し感度を
調整することを特徴とする反射型ホトセンサを提供する
ことで課題を解決するものである。
According to the present invention, as a specific means for solving the above-mentioned conventional problems, there are provided a light projecting section comprising a light emitting element and a lens, and a light receiving section comprising a light receiving element and a lens. And a detection circuit for determining the presence or absence of a detection object from the output of the light receiving unit, wherein the sensitivity adjustment means is provided with sensitivity adjustment means for correcting individual differences between the light emitting element and the light receiving element. The means is an optical diaphragm device provided in any one of the light projecting unit and the light receiving unit, and the optical diaphragm device includes a case in which the light emitting element or the light receiving element and the lens are attached at a predetermined interval. A diaphragm plate provided with a rotation shaft at one end and rotatably fixed inside the case, wherein the diaphragm plate has a projection at an end opposite to the rotation shaft, and the case has Is an arc around the rotation axis A plurality of adjustment holes are provided, and by inserting a projection of the aperture plate into any of the adjustment holes, the optical path between the light-emitting element or the light-receiving element is temporarily blocked to adjust the sensitivity. The object of the present invention is to solve the problem by providing a reflection-type photosensor that performs the following.

【0009】[0009]

【発明の実施の形態】つぎに、本発明を図に示す実施形
態に基づいて詳細に説明する。図1に符号1で示すもの
は本発明に係る反射型ホトセンサであり、この反射型ホ
トセンサ1は、LEDなど発光素子2aとレンズ2bと
から成る投光部2と、ホトダイオードなど受光素子3a
とレンズ3bとから成る受光部3と、コンパレータ4a
を含む検出回路4とで構成されるものである点は従来例
のものと同様である。
Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1 is a reflection type photosensor according to the present invention. The reflection type photosensor 1 includes a light emitting unit 2 including a light emitting element 2a such as an LED and a lens 2b, and a light receiving element 3a such as a photodiode.
Light receiving section 3 comprising a lens and a lens 3b, and a comparator 4a
This is the same as that of the conventional example in that it comprises a detection circuit 4 including

【0010】ここで、本発明では前記発光素子2aおよ
び受光素子3aの個体差を補正するための感度調整手段
として、前記投光部2或いは受光部3の何れか一方に光
学式絞り装置5を設けるものである。尚、上記光学式絞
り装置5は投光部2、受光部3の何れに設ける場合で
も、得られる作用、効果は全くに同様であるので、この
実施形態では投光部2に設けた例で説明を行う。
Here, in the present invention, as one of sensitivity adjusting means for correcting an individual difference between the light emitting element 2a and the light receiving element 3a, an optical diaphragm device 5 is provided on one of the light projecting section 2 and the light receiving section 3. It is provided. Note that, regardless of whether the optical diaphragm device 5 is provided in either the light projecting unit 2 or the light receiving unit 3, the functions and effects obtained are completely the same. Give an explanation.

【0011】また、前記投光部2に発光素子2aおよび
受光素子3aの個体差を補正するための感度調整手段で
ある光学式絞り装置5が設けられたことで、前記検出回
路4中で、従来は上記の個体差を補正する目的で設けら
れていた可変抵抗器VRは採用されることはなく、前記
受光素子3aは抵抗器R によりアースEに接続され
(従来例の図6も参照されたい)ている。
The light projecting section 2 is provided with an optical diaphragm device 5 which is a sensitivity adjusting means for correcting individual differences between the light emitting element 2a and the light receiving element 3a. conventionally variable resistor VR, which provided for the purpose of correcting the individual difference of the above not to be employed, the light receiving element 3a by resistor R 3 is connected to the earth E (conventional example 6 see also I want to be).

【0012】図2に示すものは前記投光部2であり、こ
の投光部2には、発光素子2aとレンズ2bとが、例え
ば樹脂などで成形されたケース2cに所定の間隙をもっ
て取付けられている。本発明では前記発光素子2aとレ
ンズ2bとの間隙に前記光学式絞り装置5を設けるもの
であり、具体的には、開口部51aが設けられた絞り板
51を発光素子2aとレンズ2bとの間で光軸Z方向に
平行移動させることで調整を行うものである。
FIG. 2 shows the light projecting section 2, in which a light emitting element 2a and a lens 2b are attached with a predetermined gap to a case 2c formed of, for example, resin. ing. In the present invention, the optical diaphragm device 5 is provided in the gap between the light emitting element 2a and the lens 2b. Specifically, the diaphragm plate 51 provided with the opening 51a is connected to the light emitting element 2a and the lens 2b. The adjustment is performed by parallel movement in the optical axis Z direction.

【0013】前記絞り板51は、前記ケース2cの内径
を光軸Zに直交する方向で遮蔽する形状として形成され
るものであり、若しも上記した内径が正方形である場合
には、絞り板51bも外形が略正方形の板状として形成
される。そして、前記光軸Zに中心を一定させて、例え
ば発光素子2aの外形と略同一とする孔径の開口部51
aが設けられている。
The aperture plate 51 is formed in a shape that shields the inner diameter of the case 2c in a direction perpendicular to the optical axis Z. If the inner diameter is square, the aperture plate 51 51b is also formed as a substantially square plate shape. An opening 51 having a hole diameter substantially equal to the outer shape of the light emitting element 2a, for example, having the center fixed to the optical axis Z.
a is provided.

【0014】このときに、前記絞り板51の外形は、例
えば左右方向に前記ケース2cの内径よりも適宜に大き
く形成されており、ケース2cの内径の左右の壁面の発
光素子2aとレンズ2bとの間には、光軸Zと直交する
方向に複数の調整溝52が左右対称に設けられ、この調
整溝52に落とし込むことで、前記絞り板51をケース
2cに取付けられるものとされている。
At this time, the outer shape of the aperture plate 51 is formed, for example, in the left-right direction to be appropriately larger than the inner diameter of the case 2c, and the light-emitting elements 2a and the lenses 2b on the left and right wall surfaces of the inner diameter of the case 2c. A plurality of adjustment grooves 52 are provided symmetrically in a direction perpendicular to the optical axis Z, and the aperture plate 51 is attached to the case 2c by dropping into the adjustment grooves 52.

【0015】よって、前記調整溝52が10個所に設け
られているものであれば、前記絞り板51は発光素子2
aとレンズ2bとの間で10個所の何れかの位置に調整
できるものとなる。尚、何れの位置に取付けた場合で
も、絞り板51は光軸Zと直交し、且つ、開口部51a
の中心を光軸Zと一致しているものとなる。
Therefore, if the adjustment grooves 52 are provided at ten positions, the aperture plate 51 can be
The position can be adjusted to any one of ten positions between the lens a and the lens 2b. In any case, the diaphragm plate 51 is perpendicular to the optical axis Z and the aperture 51a.
Are coincident with the optical axis Z.

【0016】図3は上記の構成とした光学式絞り装置5
の作用を説明するものであり、絞り板51が発光素子2
a側に最も近接する位置P1に設置された状態では、こ
の絞り板51に設けられた開口部51aは発光素子2a
の外径と略同一とされているので、発光素子2aから放
射される光は開口部51aに遮られることなくレンズ2
bの全面に達するものと成る。
FIG. 3 shows an optical diaphragm device 5 having the above-described structure.
The operation of the aperture plate 51 will be described.
In a state where the aperture plate 51 is installed at the position P1 closest to the side a, the aperture 51a provided in the aperture plate 51 is connected to the light emitting element 2a.
Of the lens 2 without being blocked by the opening 51a.
b.

【0017】また、絞り板51がレンズ2b側に最も近
接する位置P2に設置された状態では、レンズ2bの口
径は開口部51aにより遮蔽され、例えば、開口部51
aとレンズ口径との比が1:2である場合には、光量は
1/4に減衰されるものとなる。そして、上記位置P1
と位置P2の中間では両者の中間の減衰率が得られるも
のとなる。
When the diaphragm plate 51 is installed at the position P2 closest to the lens 2b, the aperture of the lens 2b is blocked by the opening 51a.
When the ratio between a and the lens aperture is 1: 2, the light amount is attenuated to 1/4. Then, the position P1
Between the position P2 and the position P2, an intermediate attenuation rate between the two is obtained.

【0018】従って、反射型ホトセンサ1としての感度
設定を行うときには、例えば検知限界から僅かに高い反
射率を有する反射板と、僅かに低い反射率を有する反射
板との2枚を用意しておき、一方の反射板を投光部2と
受光部3との前方に設置したときには検出が行われ、他
方の反射板では検出が行われない位置の調整溝52に絞
り板51を設定すれば良い。
Therefore, when setting the sensitivity as the reflection type photosensor 1, for example, a reflection plate having a slightly higher reflectance than a detection limit and a reflection plate having a slightly lower reflectance are prepared. When one of the reflectors is installed in front of the light projecting unit 2 and the light receiving unit 3, the detection is performed, and the aperture plate 51 is set in the adjustment groove 52 at a position where the detection is not performed by the other reflector. .

【0019】このときに、絞り板51の開口部51a
は、その中心を光軸Zと一致させた状態のまま移動する
ものであるので、感度調整を行うときにも、投光部2
(或いは受光部3)の投射方向(受光方向)などに対し
て一切に変化を与えることはないものとなる。
At this time, the opening 51a of the diaphragm plate 51
Moves with its center aligned with the optical axis Z, so that the light emitting unit 2
The projection direction (light receiving direction) of the light receiving unit 3 (or the light receiving unit 3) does not change at all.

【0020】よって、本発明の反射型ホトセンサ1で
は、調整溝52はケース2cの成形時に同時に形成可能
であるので設けるための費用などを発生せず、例えばプ
レス加工などで簡便に形成できる絞り板51の追加のみ
で可変抵抗器VRを使用することなく感度調整が行える
ものとなる。
Therefore, in the reflection type photosensor 1 of the present invention, since the adjusting groove 52 can be formed at the same time as the case 2c is formed, there is no cost for providing the adjusting groove 52. The sensitivity adjustment can be performed without using the variable resistor VR only by adding 51.

【0021】このときに、前記絞り板51は調整溝52
により確実に保持されているものであるので、振動など
が加えられた場合にも調整が変化することなく、また、
絞り板51を形成する材質、或いは、処理を適宜に選定
することで耐久性も高いものとすることができるので、
温度、湿度による劣化なども生じないものとすることが
可能である。
At this time, the diaphragm plate 51 is provided with an adjusting groove 52.
The adjustment is not changed even when vibration or the like is applied,
By appropriately selecting the material for forming the diaphragm plate 51 or the treatment, the durability can be increased.
Deterioration due to temperature and humidity can be prevented.

【0022】図4及び図5に示すものは別の実施形態で
あり、前の実施形態では絞り板51は光軸Zと平行移動
するものとして形成されていたが、本発明はこれを限定
するものではなく、図4に示すように一方の端部に回転
軸53aを設けた絞り板53として形成し、この絞り板
53を前記回転軸53aを回転中心として引き戸状に回
転させ、発光素子2aとレンズ2bとの間の光路を漸次
に遮蔽し調整を行うものとしても良い。
FIGS. 4 and 5 show another embodiment. In the previous embodiment, the diaphragm plate 51 was formed so as to move in parallel with the optical axis Z. However, the present invention is not limited to this. Instead, as shown in FIG. 4, it is formed as a diaphragm plate 53 provided with a rotating shaft 53a at one end, and the diaphragm plate 53 is rotated like a sliding door around the rotating shaft 53a as a center of rotation, thereby forming the light emitting element 2a. The optical path between the lens and the lens 2b may be gradually shielded for adjustment.

【0023】この場合、ケース2cには前記回転軸53
aを中心とする円弧上に複数の調整孔54を設けてお
き、絞り板53の回転軸53aと反対側の端部に設けら
れた突起53bを何れかの調整孔54に挿入し、光路に
対する侵入量を変えて光量を調整するものとすれば良い
ものとなる。
In this case, the rotating shaft 53 is provided on the case 2c.
A plurality of adjustment holes 54 are provided on an arc centered at a, and a projection 53b provided at an end of the diaphragm plate 53 opposite to the rotation shaft 53a is inserted into any of the adjustment holes 54, so that the optical path is adjusted. It suffices to adjust the amount of light by changing the amount of penetration.

【0024】また、このときに前記絞り板53の光路を
遮る部分となる遮蔽部53cの形状は、例えば図5に示
すように三角形状に突出するものとしておき、発光素子
2aからの光量の多い光軸Z近傍を重点的に遮蔽するも
のとして、遮蔽効率を向上させるなどは自在である。
At this time, the shape of the shielding portion 53c, which blocks the optical path of the diaphragm plate 53, is set to protrude in a triangular shape, for example, as shown in FIG. 5, so that a large amount of light is emitted from the light emitting element 2a. It is possible to freely shield the vicinity of the optical axis Z to improve the shielding efficiency.

【0025】[0025]

【発明の効果】以上に説明したように本発明により、感
度調整手段を、投光部と受光部との何れか一方に設けら
れた光学式絞り装置としたことで、湿度、温度による抵
抗体の劣化により抵抗値に変化を生じて感度調整が狂い
易く、或いは、振動による摺動子の移動で設定値が変動
し感度調整が狂い易い可変抵抗器を使用することなく感
度調整を行えるものとして、この種の反射型ホトセンサ
の信頼性の向上に極めて優れた効果を奏するものであ
る。
As described above, according to the present invention, the sensitivity adjusting means is an optical diaphragm device provided in one of the light projecting unit and the light receiving unit. The sensitivity adjustment is likely to be out of order due to the change in the resistance value due to the deterioration of the sensitivity, or the sensitivity adjustment can be performed without using a variable resistor, in which the setting value fluctuates due to the movement of the slider due to vibration and the sensitivity adjustment is easily out of order. Thus, this type of reflection type photosensor has an extremely excellent effect in improving the reliability.

【0026】また、光学式絞り装置を、所定の径の開口
部が設けられた絞り板を、レンズと何れかの素子との間
を光軸方向に移動可能な構成のものとしたことで、感度
調整を行うための部品を実質的に絞り板のみで良いもの
として、安価に実施可能としコストダウンにも優れた効
果を奏する。
In the optical diaphragm device, the diaphragm plate having an opening having a predetermined diameter is configured to be movable in the optical axis direction between the lens and any of the elements. Since only a diaphragm plate is sufficient as a component for adjusting the sensitivity, it can be implemented at low cost and has an excellent effect of cost reduction.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明に係る反射型ホトセンサの一実施形態
を示す略示的な配線図である。
FIG. 1 is a schematic wiring diagram showing an embodiment of a reflection type photosensor according to the present invention.

【図2】 同じ実施形態の要部を示す斜視図である。FIG. 2 is a perspective view showing a main part of the same embodiment.

【図3】 光学式絞り装置の作用を示す説明図である。FIG. 3 is an explanatory diagram showing an operation of the optical diaphragm device.

【図4】 同じく本発明に係る反射型ホトセンサの別の
実施形態を要部で示す平面図である。
FIG. 4 is a plan view showing another embodiment of a reflection type photosensor according to the present invention in a main part.

【図5】 別の実施形態における絞り板を示す平面図で
ある。
FIG. 5 is a plan view showing an aperture plate according to another embodiment.

【図6】 従来例を示す略示的な配線図である。FIG. 6 is a schematic wiring diagram showing a conventional example.

【符号の説明】[Explanation of symbols]

1……反射型ホトセンサ 2……投光部 2a……発光素子 2b……レンズ 2c……ケース 3……受光部 3a……受光素子 3a……レンズ 4……検出回路 5……光学的絞り装置 51、53……絞り板 52……調整溝 53……調整孔 Z……光軸 DESCRIPTION OF SYMBOLS 1 ... Reflection type photo sensor 2 ... Light emitting part 2a ... Light emitting element 2b ... Lens 2c ... Case 3 ... Light receiving part 3a ... Light receiving element 3a ... Lens 4 ... Detection circuit 5 ... Optical diaphragm Apparatus 51, 53 ... diaphragm plate 52 ... adjustment groove 53 ... adjustment hole Z ... optical axis

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI H03K 17/78 G01S 17/02 A G01V 9/04 A (58)調査した分野(Int.Cl.7,DB名) G01J 1/02 - 1/06 G01V 9/04 G01S 7/48 - 7/50 G01S 17/00 - 17/88 H01H 35/00 H03K 17/78 G08B 13/18 - 13/196 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 identification code FI H03K 17/78 G01S 17/02 A G01V 9/04 A (58) Investigated field (Int.Cl. 7 , DB name) G01J 1 / 02-1/06 G01V 9/04 G01S 7/48-7/50 G01S 17/00-17/88 H01H 35/00 H03K 17/78 G08B 13/18-13/196

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 発光素子とレンズとで成る投光部と、受
光素子とレンズとで成る受光部と、該受光部の出力から
披検出体の有無を判定する検出回路とから成り、前記発
光素子および受光素子の個体差を補正する感度調整手段
が設けられて成る反射型ホトセンサにおいて、前記感度
調整手段は、前記投光部と受光部との何れか一方に設け
られた光学式絞り装置であり、該光学絞り装置は、前記
発光素子または受光素子とレンズとを所定の間隔をもっ
て取付けたケースと、一方の端部に回転軸が設けられて
ケース内を回動自在に軸止された絞り板とから成り、前
記絞り板は回転軸と反対側の端部に突起が設けられ、前
記ケースには前記回転軸を中心とする円弧状に複数の調
整孔が設けられ、該調整孔の何れかに前記絞り板の突起
を挿入することで、発光素子または受光素子との間の光
路を暫時に遮蔽し感度を調整することを特徴とする反射
型ホトセンサ。
A light-emitting unit including a light-emitting element and a lens; a light-receiving unit including a light-receiving element and a lens; and a detection circuit for determining the presence or absence of a detection object from an output of the light-receiving unit. In a reflection type photosensor provided with sensitivity adjusting means for correcting an individual difference between an element and a light receiving element, the sensitivity adjusting means is an optical diaphragm device provided in one of the light projecting unit and the light receiving unit. The optical diaphragm device includes a case in which the light emitting element or the light receiving element and the lens are mounted at a predetermined interval, and a diaphragm provided with a rotation shaft at one end and rotatably fixed in the case. The diaphragm plate is provided with a projection at an end opposite to the rotation axis, and the case is provided with a plurality of adjustment holes in an arc shape centered on the rotation axis. By inserting the projection of the crab, A reflection type photosensor, wherein an optical path between a light emitting element and a light receiving element is temporarily shielded to adjust sensitivity.
JP34954595A 1995-12-22 1995-12-22 Reflective photo sensor Expired - Fee Related JP3146453B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34954595A JP3146453B2 (en) 1995-12-22 1995-12-22 Reflective photo sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34954595A JP3146453B2 (en) 1995-12-22 1995-12-22 Reflective photo sensor

Publications (2)

Publication Number Publication Date
JPH09178551A JPH09178551A (en) 1997-07-11
JP3146453B2 true JP3146453B2 (en) 2001-03-19

Family

ID=18404448

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34954595A Expired - Fee Related JP3146453B2 (en) 1995-12-22 1995-12-22 Reflective photo sensor

Country Status (1)

Country Link
JP (1) JP3146453B2 (en)

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* Cited by examiner, † Cited by third party
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KR101975011B1 (en) * 2017-07-18 2019-05-03 주식회사 크린버텍 Multipurpose felting and manufacturing method of that's

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4571415B2 (en) * 2004-02-13 2010-10-27 サンクス株式会社 Optical device and photoelectric sensor using this optical device
JP5240493B2 (en) * 2007-08-16 2013-07-17 ブラザー工業株式会社 Image forming apparatus
KR101868094B1 (en) * 2016-08-24 2018-06-15 엘아이지넥스원 주식회사 Signal Simulator for Infrared counter measure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101975011B1 (en) * 2017-07-18 2019-05-03 주식회사 크린버텍 Multipurpose felting and manufacturing method of that's

Also Published As

Publication number Publication date
JPH09178551A (en) 1997-07-11

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