JPH0313806Y2 - - Google Patents
Info
- Publication number
- JPH0313806Y2 JPH0313806Y2 JP1986095163U JP9516386U JPH0313806Y2 JP H0313806 Y2 JPH0313806 Y2 JP H0313806Y2 JP 1986095163 U JP1986095163 U JP 1986095163U JP 9516386 U JP9516386 U JP 9516386U JP H0313806 Y2 JPH0313806 Y2 JP H0313806Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical fiber
- lens
- emitting element
- receiving element
- 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
Links
- 239000013307 optical fiber Substances 0.000 claims description 37
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
Description
【考案の詳細な説明】
「産業上の利用分野」
この考案は光をバーコードに投射し、その反射
光を受光して電気信号に変換し、その電気信号か
ら前記バーコードを検出するために用いられるバ
ーコード続取り用ホトセンサに関する。[Detailed description of the invention] "Industrial application field" This invention projects light onto a barcode, receives the reflected light, converts it into an electrical signal, and detects the barcode from the electrical signal. The present invention relates to a photo sensor used for barcode succession.
「従来の技術」
第5図に従来のこの種ホトセンサを示す。ケー
ス11が縦に二つ割りとされ、その割られた面に
おいて、先端にレンズ(対物レンズ)12が取付
けられ、ケース11内でレンズ12と一端面が対
向されて光フアイバ13が収容される。ケース1
1後方端部内に発光素子14と受光素子15とが
配され、これら発光素子14及び受光素子15と
光フアイバ13の他端面との間は光フアイバ1
6,17でそれぞれ光学的に結合されている。レ
ンズ12、光フアイバ13,16,17、発光素
子14、受光素子15はケース11の分割面に形
成された位置決め凹部内に嵌込まれている。"Prior Art" FIG. 5 shows a conventional photo sensor of this type. A case 11 is vertically divided into two parts, and a lens (objective lens) 12 is attached to the tip of the split surface, and an optical fiber 13 is accommodated in the case 11 with one end face facing the lens 12. Case 1
A light emitting element 14 and a light receiving element 15 are disposed within the rear end of the optical fiber 1.
6 and 17, respectively, and are optically coupled. The lens 12, the optical fibers 13, 16, and 17, the light emitting element 14, and the light receiving element 15 are fitted into positioning recesses formed in the dividing surface of the case 11.
発光素子14からの光は光フアイバ16,13
を通りレンズ12よりバーコード18に投射さ
れ、その反射光はレンズ12を介して光フアイバ
13に入射され、これより光フアイバ13,17
を通じて受光素子15に導かれ、これにて電気信
号に変換される。 The light from the light emitting element 14 is transmitted through optical fibers 16 and 13.
The reflected light passes through the lens 12 and is projected onto the barcode 18, and the reflected light enters the optical fiber 13 through the lens 12, and from there the light is transmitted to the optical fibers 13, 17.
The light is guided to the light receiving element 15 through the light receiving element 15, where it is converted into an electrical signal.
従来のホトセンサはこのような構成となつてい
るため、光フアイバ13の端面に光フアイバ1
6,17の両端面対接させ、かつ光フアイバ13
のコアと光フアイバ16,17の各コアとが対接
するように光フアイバ16,17のコアを接近さ
せる必要があり、光フアイバ16,17のコアを
接近させる必要があり、光フアイバ16,17の
端部断面を半円に近い形状とするなどこれら光フ
アイバ13,16,17を結合させるため加工、
組立ての作業が大変であつた。 Since the conventional photo sensor has such a configuration, the optical fiber 1 is attached to the end face of the optical fiber 13.
6 and 17, and the optical fiber 13
It is necessary to bring the cores of the optical fibers 16, 17 close to each other so that the cores of the optical fibers 16, 17 are in contact with each other. In order to connect these optical fibers 13, 16, 17, processing is carried out, such as making the cross section of the end of the fiber into a shape close to a semicircle.
The assembly work was difficult.
「問題点を解決するための手段」
この考案によれば光フアイバの一端は従来と同
様にバーコードに対する光投射、その反射光受光
のための対物レンズと結合されるが、その光フア
イバの他端は第2レンズを介して発光素子及ぼ受
光素子とそれぞれ結合される。つまり光フアイバ
と発光素子が受光素子とを結合させるために光フ
アイバを用いない、このためその製造組立が頗る
簡単になる。なお必要に応じて発光素子と受光素
子との間に遮光板を配し、発光素子の光が直接受
光素子に入るのを遮断する。また対物レンズと光
フアイバとの間に絞りを配し、斜めに入射する不
要光を遮断し、光フアイバと対物レンズとの間を
光フアイバの軸心と平行な光のみが通過するよう
にすることが好ましい。``Means for Solving the Problems'' According to this invention, one end of the optical fiber is connected to an objective lens for projecting light onto the barcode and receiving the reflected light, as in the past, but the other end of the optical fiber The ends are respectively coupled to a light emitting element and a light receiving element via a second lens. That is, no optical fiber is used to connect the optical fiber and the light-emitting element to the light-receiving element, which greatly simplifies manufacturing and assembly. Note that, if necessary, a light-shielding plate is placed between the light-emitting element and the light-receiving element to block light from the light-emitting element from directly entering the light-receiving element. In addition, a diaphragm is placed between the objective lens and the optical fiber to block unnecessary light incident obliquely and to allow only light parallel to the axis of the optical fiber to pass between the optical fiber and the objective lens. It is preferable.
「実施例」
第1図はこの考案の実施例を示し、第5図と対
応する部分に同一符号を付けてある。この考案で
は光フアイバ13の後方端面と発光素子14及び
受光素子15との間にこれらを光学的に結合する
第2レンズ21が配される。この結合を近い距離
で容易にするため発光素子14と受光素子15と
が接近して並べられている。またこの例では受光
素子15の光が直接受光素子15に入射されるの
を遮断するため発光素子14と受光素子15との
間に遮光板22が第2レンズ21側に突出して介
在されている。更にこの実施例では光フアイバ1
3とレンズ12との間に絞り23が配され、光フ
アイバ13の軸心とレンズ12の光軸とはほぼ同
一直線上に配され、この直線と平行な光以外の斜
めの不要光が光フアイバ13に入るのをなるべく
遮断するように構成し、レンズ12の収差による
バーコード18へ投射される光のボケを防止す
る。"Embodiment" FIG. 1 shows an embodiment of this invention, and parts corresponding to those in FIG. 5 are given the same reference numerals. In this invention, a second lens 21 is disposed between the rear end face of the optical fiber 13 and the light emitting element 14 and the light receiving element 15 to optically couple them. In order to facilitate this coupling at a short distance, the light emitting element 14 and the light receiving element 15 are arranged close to each other. Further, in this example, a light shielding plate 22 is interposed between the light emitting element 14 and the light receiving element 15 in order to block the light from the light receiving element 15 from directly entering the light receiving element 15, protruding toward the second lens 21 side. . Furthermore, in this embodiment, the optical fiber 1
A diaphragm 23 is disposed between the optical fiber 13 and the lens 12, and the axis of the optical fiber 13 and the optical axis of the lens 12 are arranged almost on the same straight line, and oblique unnecessary light other than light parallel to this straight line is blocked. It is configured to block as much of the light as possible from entering the fiber 13 to prevent blurring of the light projected onto the barcode 18 due to aberrations of the lens 12.
発光素子14よりの光24は第2レンズ21に
より光フアイバ13の端面のコアに入射され、こ
れより光フアイバ13内を直進し、レンズ12に
よりバーコード18に投射される。バーコード1
8よりの反射光25はレンズ25により光フアイ
バ13に入射され、これより光フアイバ13のコ
アを通り、第2レンズ21により受光素子15に
入射される。なおこの時、反射光25の一部は発
光素子14側に達し、損失となるが、同様の損失
は従来のこの種ホトセンサでも生じていた。 Light 24 from the light emitting element 14 is incident on the core of the end face of the optical fiber 13 by the second lens 21, travels straight through the optical fiber 13, and is projected onto the barcode 18 by the lens 12. Barcode 1
The reflected light 25 from 8 is incident on the optical fiber 13 by the lens 25 , passes through the core of the optical fiber 13 , and is incident on the light receiving element 15 by the second lens 21 . At this time, a portion of the reflected light 25 reaches the light emitting element 14 side, resulting in a loss, but a similar loss has also occurred in conventional photosensors of this type.
第1図の構成において発光素子14と受光素子
15とはなるべく接近していた方がよい。このよ
うな点から第2図乃至第4図に示すように、端子
31,32の端面上にペレツトの発光素子33,
受光素子34が取付けられると共に各一つの電極
が電気的にそれぞれ接続される。発光素子33、
受光素子34の各他の電極が端子35,36の各
一端面にそれぞれ接続される。端子31,32,
35,36はそれぞれほぼ平行に配され、その発
光素子33、受光素子34側の端部は透光性合成
樹脂材のパツケージ37内にモールドされる。パ
ツケージ37の発光素子33と受光素子34との
間にその前方端面(図では上面)に溝38が形成
され、溝38に遮光板(図示せず)を挿入し、発
光素子33と受光素子34とを遮光することがで
きるようにされる。 In the configuration shown in FIG. 1, it is preferable that the light emitting element 14 and the light receiving element 15 be as close as possible. From this point of view, as shown in FIGS. 2 to 4, pellet light emitting elements 33,
The light receiving elements 34 are attached and each one of the electrodes is electrically connected to each other. light emitting element 33,
The other electrodes of the light receiving element 34 are connected to one end surface of each of the terminals 35 and 36, respectively. Terminals 31, 32,
35 and 36 are arranged substantially parallel to each other, and their ends on the side of the light emitting element 33 and the light receiving element 34 are molded in a package 37 made of a translucent synthetic resin material. A groove 38 is formed on the front end surface (upper surface in the figure) between the light emitting element 33 and the light receiving element 34 of the package 37, and a light shielding plate (not shown) is inserted into the groove 38. and can be shielded from light.
「考案の効果」
以上述べたように、この考案のホトセンサによ
れば光フアイバ13と発光素子14又は33、受
光素子15又は34との光学的結合を第2レンズ
21で行い、光フアイバによらないため、第5図
について説明した光フアイバ16,17と光フア
イバ13との結合のための難しい加工、組立てを
必要とせず、第2レンズ21は合成樹脂材の単純
な形状のレンズで済み、光フアイバ13と発光素
子及び受光素子との光学的結合を頗る簡単に行う
ことができる。"Effects of the Invention" As described above, according to the photosensor of this invention, optical coupling between the optical fiber 13 and the light emitting element 14 or 33 and the light receiving element 15 or 34 is performed by the second lens 21, Therefore, there is no need for difficult processing and assembly for coupling the optical fibers 16, 17 and the optical fiber 13 as explained with reference to FIG. 5, and the second lens 21 can be a simple lens made of a synthetic resin material. Optical coupling between the optical fiber 13 and the light emitting element and the light receiving element can be achieved very easily.
第2レンズ21により集光するため、発光素子
14又は33の光を有効に利用でき、かつ発光素
子15又は34に効果的に反射光を入射でき、そ
れだけ安価な発光素子、受光素子を使用すること
ができる。 Since the light is focused by the second lens 21, the light from the light emitting element 14 or 33 can be used effectively, and the reflected light can be effectively input to the light emitting element 15 or 34, so that a light emitting element and a light receiving element that are less expensive can be used. be able to.
また第2図乃至第4図に示した構成とする時
は、発光素子と受光素子とを著しく接近させるこ
とができ、全体の構造を小形化でき、かつ光を有
効に利用できる。かつこれを1つの部分として扱
うことができ、組立て作業が簡単になる。 Further, when the configurations shown in FIGS. 2 to 4 are adopted, the light emitting element and the light receiving element can be brought very close to each other, the overall structure can be downsized, and light can be used effectively. Moreover, it can be handled as one part, which simplifies the assembly work.
第1図はこの考案によるホトセンサの一例を示
す断面図、第2図はその発光素子及び受光素子部
分の他の例を示す平面図、第3図は第2図のAA
線断面図、第4図は第2図の左側面図、第5図は
従来のホトセンサを示す断面図である。
Fig. 1 is a cross-sectional view showing an example of the photosensor according to this invention, Fig. 2 is a plan view showing another example of the light emitting element and light receiving element portion, and Fig. 3 is the AA of Fig. 2.
4 is a left side view of FIG. 2, and FIG. 5 is a sectional view showing a conventional photosensor.
Claims (1)
1レンズと、 その第1レンズと一端が対向し、その一端より
放射した光を上記第1レンズを介して上記バーコ
ードに投射し、そのバーコードよりの反射光を上
記第1レンズを介して上記一端に入射する光フア
イバと、 その光フアイバの一端と上記第1レンズとの間
に介在され、その第1レンズの径より小さい開口
径をもつ絞りと、 上記光フアイバの他端側に設けられた発光素子
と、 その発光素子と並べて設けられ、光を電気信号
に変換する受光素子と、 これら発光素子及び受光素子と上記光フアイバ
の他端との間に配され、上記発光素子よりの光を
上記光フアイバのコアに入射し、上記光フアイバ
のコアよりの反射光を上記受光素子に入射させる
第2レンズとを具備するバーコード続取り用ホト
センサ。[Claims for Utility Model Registration] A first lens that is to be opposed to the barcode that is to be inherited, one end of which is opposed to the first lens, and the light emitted from the one end is transmitted to the bar code through the first lens. an optical fiber that projects light onto a barcode and makes the reflected light from the barcode enter the one end of the barcode via the first lens; a diaphragm having an aperture diameter smaller than the diameter of the optical fiber; a light emitting element provided on the other end side of the optical fiber; a light receiving element provided in parallel with the light emitting element and converting light into an electrical signal; these light emitting elements and the light receiving element; a second lens disposed between the element and the other end of the optical fiber, which allows light from the light emitting element to enter the core of the optical fiber, and allows light reflected from the core of the optical fiber to enter the light receiving element; A photo sensor for barcode succession, comprising:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986095163U JPH0313806Y2 (en) | 1986-06-20 | 1986-06-20 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986095163U JPH0313806Y2 (en) | 1986-06-20 | 1986-06-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS631256U JPS631256U (en) | 1988-01-07 |
JPH0313806Y2 true JPH0313806Y2 (en) | 1991-03-28 |
Family
ID=30959398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986095163U Expired JPH0313806Y2 (en) | 1986-06-20 | 1986-06-20 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0313806Y2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5750762B2 (en) * | 1972-08-08 | 1982-10-28 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS536339Y2 (en) * | 1973-03-05 | 1978-02-17 | ||
JPS5750762U (en) * | 1980-09-05 | 1982-03-23 |
-
1986
- 1986-06-20 JP JP1986095163U patent/JPH0313806Y2/ja not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5750762B2 (en) * | 1972-08-08 | 1982-10-28 |
Also Published As
Publication number | Publication date |
---|---|
JPS631256U (en) | 1988-01-07 |
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