JP2004014799A - Inspection system for light emitting device - Google Patents

Inspection system for light emitting device Download PDF

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Publication number
JP2004014799A
JP2004014799A JP2002166058A JP2002166058A JP2004014799A JP 2004014799 A JP2004014799 A JP 2004014799A JP 2002166058 A JP2002166058 A JP 2002166058A JP 2002166058 A JP2002166058 A JP 2002166058A JP 2004014799 A JP2004014799 A JP 2004014799A
Authority
JP
Japan
Prior art keywords
light
light emitting
inspection
emitting element
emitting device
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.)
Pending
Application number
JP2002166058A
Other languages
Japanese (ja)
Inventor
Yoshitomo Fujimoto
藤本 義知
Mitsuo Inoue
井上 光雄
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP2002166058A priority Critical patent/JP2004014799A/en
Publication of JP2004014799A publication Critical patent/JP2004014799A/en
Pending legal-status Critical Current

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  • Testing Of Individual Semiconductor Devices (AREA)
  • Led Devices (AREA)
  • Light Receiving Elements (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To carry out an inspection of the light emission of a light emitting device mounted to a board, at a low cost accurately. <P>SOLUTION: A CdS cell 5 is arranged at a position of a focal point on a light receiving side of a focusing mechanism 4 for focusing the light from a light emitting device 3 mounted on a board 1 by using a convex lens unit, and also an optical path in the focusing mechanism 4 is shaded from the external light. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、基板に実装された発光ダイオードやランプなどの発光素子が適正に発光しているかどうかを検査する行程で利用する検査装置に関する。
【0002】
【従来の技術】
従来より、この種の発光素子の発光検査にはCCDカメラを利用した画像処理、フォトセンサ、などが用いられている。
【0003】
【発明が解決しようとする課題】
しかし、CCDカメラを利用した画像処理は精度の高い検査ができる反面、コスト高になる欠点があり、実用上に難点がある。
【0004】
本発明は、このような点に着目してなされたものであって、安価で的確な発光検査が行える検査装置を提供することを目的とする。
【0005】
【課題を解決するための手段】
請求項1に係る発明の発光素子の検査装置は、基板に実装された発光素子からの光を凸レンズ群を利用して集光する集光機構の受光側の焦点位置にCdSセルを配備するとともに、集光機構における光路を外光に対する遮光構造にしてあることを特徴とする。
【0006】
この構成によると、集光機構の対物焦点に検査対象となる基板上の発光素子が位置するようにセットして、発光素子を通電発光させることで、発生した光を凸レンズ群で集光してCdSセルに照射させ、CdSセルが受光してその電気抵抗値が変化することを検出して、発光素子の発光性能や発光用回路の良否の判断に利用する。この場合、集光機構における光路は遮光構造となっているので、外光による影響を受けること少なく検査を行うことができ、光量の小さい素子や発生した光が拡散しやすい指向性の低い素子でも的確にその発光の有無を認識することができる。
【0007】
しかも、CdSセルはそれ自体が安価に入手することができるとともに、検査回路も比較的単純なものであり、検査装置全体としてCCDカメラを利用した画像処理形式のものに比較して格段に安価に構成することができ、実用上の利点が高いものである。
【0008】
【発明の実施の形態】
図1に、本発明に係る発光素子の検査装置の原理構造が示されている。この検査装置は、基板1に各種の電子部品2が実装された後に、電子部品群に含まれている発光素子3が適正に発光するか否かを識別する検査行程で利用されるものであり、集光機構4とCdSセル5から構成されている。
【0009】
前記集光機構4は、対物用の凸レンズ6、集光用の凸レンズ7、および、対物用の凸レンズ6から受光側の焦点位置に至る光路を覆う遮光筒8とから構成されており、遮光筒8の内面は光反射率を低くするために暗黒色に着色されている。そして、前記CdSセル5は、この集光機構7における受光側の焦点に位置するよう配備されている。
【0010】
このように構成された検査装置は、例えば、集光機構4は前後左右および上下に作動する3軸ロボットに鉛直姿勢で支持され、この集光機構4に対して基板1が水平姿勢で搬入されてくる。搬入されてきた基板1は、所定の検査位置に位置決め固定されるとともに、検査用電気回路に接続される。基板1が位置決めされると、予め入力された基板情報に基づいて集光機構4が自動的に移動され、その対物用凸レンズ6の焦点位置が検査対象の発光素子3の発光部位に合わされ、その後、発光素子3に通電される。発光素子3が発光すると、光は集光機構4で収斂されてCdSセル5に照射される。5CdSセル5は光の照射によってその電気抵抗値が変化するので、その抵抗値の変化から、発光素子3が適正に発光したか否かが判断される。また、同一基板上に複数の発光素子3が実装されている場合には、予め入力された素子配置データに基づいて集光機構4が次の検査対象の上に自動的に移動され、同様な検査を順次繰り返す。
【0011】
〔別実施形態〕
本発明は、以下のような形態で実施することもできる。
(1)上記とは逆に、集光機構4を位置固定して配備するとともに、搬入された基板1を、発光素子3の配置情報に応じて自動移動させて検査を行うようにすることもできる。
(2)レンズを光軸方向に調整して焦点位置を微調整できるように構成しておくと一層的確な検査が可能となる。
【0012】
なお、図2は、基板1に実装されたフラットパッケージICなどのパッケージ型電子部品2(1)とチップ抵抗やチップコンデンサなどのチップ部品2(2)を含む混成集積回路の一例を示すものであり、チップ部品2(2)を、パッケージ型電子部品2(1)における端子2aの間に位置させて配備することで、集積度の高いコンパクトな基板構造を得ることができるとともに、チップ部品用の配線パターンを省略することができ、回路設計のための時間の短縮化の有効となる。また、回路ループが小さくなるので、耐ノイズ性の高い回路設計が可能となる。また、図3に示すように、隣接する端子2aの対向する側辺に凹部bを形成することで、より大きいチップ部品2(2)の配備が可能となる。
【図面の簡単な説明】
【図1】検査装置の原理構造を示す断面図
【図2】パッケージ型電子部品とチップ部品との混成集積回路構造の一例を示す斜視図(イ)、平面図(ロ)、側面図(ハ)
【図3】パッケージ型電子部品とチップ部品との混成集積回路構造の他の例を示す平面図
【符号の説明】
1       基板
3       発光素子
4       集光機構
5       CdSセル
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an inspection device used in a process of inspecting whether a light emitting element such as a light emitting diode or a lamp mounted on a substrate emits light properly.
[0002]
[Prior art]
Conventionally, image processing using a CCD camera, a photo sensor, and the like have been used for light emission inspection of this type of light emitting element.
[0003]
[Problems to be solved by the invention]
However, although image processing using a CCD camera can perform inspection with high accuracy, it has a drawback of increasing costs and has a practical difficulty.
[0004]
The present invention has been made in view of such a point, and an object of the present invention is to provide an inspection apparatus capable of performing an inexpensive and accurate light emission inspection.
[0005]
[Means for Solving the Problems]
The light-emitting element inspection apparatus according to the first aspect of the present invention includes a CdS cell disposed at a light-receiving-side focal position of a light-collecting mechanism that collects light from the light-emitting element mounted on the substrate by using a convex lens group. The light path in the light condensing mechanism has a light shielding structure for external light.
[0006]
According to this configuration, the light-emitting element on the substrate to be inspected is set to be located at the objective focal point of the light-condensing mechanism, and the light-emitting element is energized to emit light, so that the generated light is collected by the convex lens group. The CdS cell is irradiated with the light, and the CdS cell receives light and detects that the electric resistance value changes, and uses it to determine the light emitting performance of the light emitting element and the quality of the light emitting circuit. In this case, the light path in the light-gathering mechanism has a light-shielding structure, so that inspection can be performed with little influence from external light, and even an element with a small amount of light or an element with low directivity in which generated light is easily diffused. The presence or absence of the light emission can be accurately recognized.
[0007]
In addition, the CdS cell itself can be obtained at low cost, and the inspection circuit is relatively simple, so that the entire inspection apparatus is much cheaper than an image processing type using a CCD camera. It can be configured and has high practical advantages.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows the principle structure of a light emitting element inspection apparatus according to the present invention. This inspection device is used in an inspection process for identifying whether or not the light emitting elements 3 included in the electronic component group emit light properly after various electronic components 2 are mounted on the substrate 1. , A light condensing mechanism 4 and a CdS cell 5.
[0009]
The condensing mechanism 4 includes a convex lens 6 for objective, a convex lens 7 for condensing, and a light-shielding cylinder 8 that covers an optical path from the convex lens for objective 6 to a focal position on the light receiving side. The inner surface 8 is colored dark black to reduce the light reflectance. The CdS cell 5 is provided so as to be located at the focal point on the light receiving side of the light collecting mechanism 7.
[0010]
In the inspection apparatus thus configured, for example, the light collecting mechanism 4 is supported in a vertical posture by a three-axis robot that operates in the front-rear, left-right, and up-down directions, and the substrate 1 is loaded into the light collecting mechanism 4 in a horizontal posture. Come. The loaded substrate 1 is positioned and fixed at a predetermined inspection position, and is connected to an inspection electric circuit. When the substrate 1 is positioned, the light collecting mechanism 4 is automatically moved based on the substrate information input in advance, and the focal position of the objective convex lens 6 is adjusted to the light emitting portion of the light emitting element 3 to be inspected. , The light emitting element 3 is energized. When the light emitting element 3 emits light, the light is converged by the light condensing mechanism 4 and is irradiated on the CdS cell 5. Since the electric resistance of the 5CdS cell 5 changes due to light irradiation, it is determined from the change in the resistance whether or not the light emitting element 3 has properly emitted light. When a plurality of light emitting elements 3 are mounted on the same substrate, the light collecting mechanism 4 is automatically moved to the next inspection object based on the element arrangement data input in advance, and the same. The test is repeated sequentially.
[0011]
[Another embodiment]
The present invention can be implemented in the following forms.
(1) Contrary to the above, the light-condensing mechanism 4 may be fixedly provided, and the inspection may be performed by automatically moving the loaded substrate 1 according to the arrangement information of the light-emitting elements 3. it can.
(2) If the lens is adjusted in the optical axis direction so that the focal position can be finely adjusted, more accurate inspection can be performed.
[0012]
FIG. 2 shows an example of a hybrid integrated circuit including a package type electronic component 2 (1) such as a flat package IC mounted on a substrate 1 and a chip component 2 (2) such as a chip resistor or a chip capacitor. Yes, by disposing the chip component 2 (2) between the terminals 2a of the package type electronic component 2 (1), it is possible to obtain a compact board structure with a high degree of integration and to provide a chip component. Can be omitted, which is effective in shortening the time for circuit design. Further, since the circuit loop becomes small, a circuit design with high noise resistance can be realized. In addition, as shown in FIG. 3, by forming the concave portion b on the opposite side of the adjacent terminal 2 a, it is possible to arrange a larger chip component 2 (2).
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the principle structure of an inspection apparatus. FIG. 2 is a perspective view (a), a plan view (b), and a side view (c) showing an example of a hybrid integrated circuit structure of a package type electronic component and a chip component. )
FIG. 3 is a plan view showing another example of a hybrid integrated circuit structure of a package type electronic component and a chip component.
DESCRIPTION OF SYMBOLS 1 Substrate 3 Light emitting element 4 Condensing mechanism 5 CdS cell

Claims (1)

基板に実装された発光素子からの光を凸レンズ群を利用して集光する集光機構の受光側の焦点位置にCdSセルを配備するとともに、集光機構における光路を外光に対する遮光構造にしてあることを特徴とする発光素子の検査装置。A CdS cell is provided at the light-receiving side focal point of the light-collecting mechanism that collects light from the light-emitting element mounted on the substrate using a convex lens group, and the light path in the light-collecting mechanism is made to be a light shielding structure for external light. An inspection device for a light-emitting element, comprising:
JP2002166058A 2002-06-06 2002-06-06 Inspection system for light emitting device Pending JP2004014799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002166058A JP2004014799A (en) 2002-06-06 2002-06-06 Inspection system for light emitting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002166058A JP2004014799A (en) 2002-06-06 2002-06-06 Inspection system for light emitting device

Publications (1)

Publication Number Publication Date
JP2004014799A true JP2004014799A (en) 2004-01-15

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JP2002166058A Pending JP2004014799A (en) 2002-06-06 2002-06-06 Inspection system for light emitting device

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016088157A1 (en) * 2014-12-05 2016-06-09 ランプサーブ株式会社 Light receiving device for optical communication, optical communication module, and visible light communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016088157A1 (en) * 2014-12-05 2016-06-09 ランプサーブ株式会社 Light receiving device for optical communication, optical communication module, and visible light communication system
JPWO2016088157A1 (en) * 2014-12-05 2018-01-18 オーエスシー株式会社 Light receiving device for optical communication, optical communication module, and visible light communication system

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