JPH07253402A - External appearance inspecting apparatus for corrugated tube and inspecting method - Google Patents
External appearance inspecting apparatus for corrugated tube and inspecting methodInfo
- Publication number
- JPH07253402A JPH07253402A JP7136694A JP7136694A JPH07253402A JP H07253402 A JPH07253402 A JP H07253402A JP 7136694 A JP7136694 A JP 7136694A JP 7136694 A JP7136694 A JP 7136694A JP H07253402 A JPH07253402 A JP H07253402A
- Authority
- JP
- Japan
- Prior art keywords
- corrugated tube
- inspected
- corrugated
- half mirror
- light
- 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
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば電力ケーブルに
おける外層のコルゲートＰＶＣ樹脂被覆或はＰＥ樹脂被
覆のような、波付管の表面欠陥を検出する外観検査方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visual inspection method for detecting a surface defect of a corrugated pipe, such as a corrugated PVC resin coating or a PE resin coating as an outer layer in a power cable.
【０００２】[0002]
【従来の技術】従来、外表面が平坦な管における表面
傷、ピンホール、汚れ等の外観検査方法としては、画像
処理方式が量産に適する方法として知られている。然し
本発明の対象とする波付で、外表に凹凸があり、多数の
曲面で表面が構成される可撓管においては、この画像処
理方式は採用されず、人により全長、全面の目視検査に
頼る外なかった。2. Description of the Related Art Conventionally, an image processing method is known as a method suitable for mass production as a visual inspection method for surface scratches, pinholes, stains, etc. on a tube having a flat outer surface. However, with a corrugated object of the present invention, there is unevenness on the outer surface, and in a flexible tube whose surface is composed of a large number of curved surfaces, this image processing method is not adopted, and a human is visually inspected for the entire length and the entire surface. I had to rely on it.
【０００３】[0003]
【発明が解決しようとする課題】これは、波付管の外観
検査に、画像処理方式を用いても、次のような理由によ
り、欠陥部の検出が明確にできなかったからである。This is because even if the image processing method is used for the visual inspection of the corrugated tube, the defect cannot be clearly detected for the following reason.
【０００４】即ち、被検材表面が平坦なものでも、光沢
のある場合は、図７（Ａ）のように、被検材表面１に対
し、撮像カメラ２を直角方向に配置し、照明３を施して
画像を観察しようとすると、撮像カメラ２自体が被検材
表面に写り、傷や汚れ等の欠陥部による画像との判別が
つきにくい問題がある。That is, even if the surface of the material to be inspected is flat, if the surface of the material to be inspected is glossy, as shown in FIG. If an image is to be observed by carrying out the above, there is a problem that the image pickup camera 2 itself appears on the surface of the material to be inspected and it is difficult to distinguish it from an image due to a defective portion such as a scratch or stain.
【０００５】従って、上記問題を解決するため、図７
（Ｂ）のように、撮像カメラ２を被検材表面に対し、斜
角方向に配置する方法が提案されている。この方法によ
れば、撮像カメラ自体が写ることはなく、平坦な表面の
検査には申し分ないが、表面に凹凸がある場合は、その
高低、曲面による画像への影響が大きく到底欠陥部の検
出はできない。Therefore, in order to solve the above problem, FIG.
As shown in (B), a method has been proposed in which the imaging camera 2 is arranged in an oblique direction with respect to the surface of the material to be inspected. According to this method, the imaging camera itself is not visible, and it is satisfactory for inspection of flat surfaces, but if there are irregularities on the surface, the height and curved surface greatly affect the image and the detection of defects is extremely high. I can't.
【０００６】また前記、撮像カメラ２を被検材表面に対
し、直角方向に配置する方式を、表面に凹凸のある被検
材に実施しようとすると、前記撮像カメラ自体の写りに
加え、凹凸表面への均一な照明３が難しく、更に検出は
困難となる。Further, if the method of arranging the image pickup camera 2 in the direction perpendicular to the surface of the material to be inspected is applied to the material to be inspected having an uneven surface, in addition to the image of the image pickup camera itself, It is difficult to uniformly illuminate the light source 3 and the detection is difficult.
【０００７】[0007]
【課題を解決するための手段】本発明は叙上の課題を解
決し、波付管の外観検査を画像処理方式によって実現し
たものである。SUMMARY OF THE INVENTION The present invention solves the above problems and realizes a visual inspection of a corrugated tube by an image processing system.
【０００８】そして、その第１の特徴とするところは、
撮像カメラと被検材の間に、被検材の表面光沢に応じた
透過率のハーフミラーを取付け、カメラ自体の像を画像
処理精度の問題とならないまで下げ、又は消去すること
が可能となるように制御したことである。The first characteristic is that
A half mirror with a transmittance corresponding to the surface gloss of the material to be inspected can be attached between the imaging camera and the material to be inspected, and the image of the camera itself can be lowered or deleted until it does not pose a problem of image processing accuracy. Is controlled.
【０００９】第２の特徴は、カメラ設置部以外に設けた
周囲照明部と、上記ハーフミラーを用いての照明とを併
用して、検査視野内の波付管表面全域からの正反射が得
られるよう、管表面全体を均一に照明したことである。A second feature is that by using an ambient illumination unit provided other than the camera installation unit and illumination using the half mirror together, specular reflection from the entire corrugated tube surface within the inspection field of view can be obtained. In this way, the entire surface of the tube is uniformly illuminated.
【００１０】第３の特徴は、照明装置、撮像カメラ、ハ
ーフミラーが、長さ方向に進行する波付管に対して、夫
々波付管の断面直交方向に複数個宛波付管を中心にして
対設されてなることである。本発明の更に具体的な特徴
は、次に示す実施例によって説明する。A third feature is that the illumination device, the image pickup camera, and the half mirror respectively have a plurality of corrugated pipes in the direction orthogonal to the cross section of the corrugated pipe with respect to the corrugated pipe that advances in the longitudinal direction. It is to be opposite. More specific features of the present invention will be described with reference to the following examples.
【００１１】[0011]
【実施例】図１、図２は本発明の実施例を模式的に示す
もので図１は側面図、図２は正面図である。被検材１
は、黒色で光沢のあるコルゲートＰＶＣ樹脂被覆を施し
た直径30〜200mm の電力ケーブルで、検査装置内を０〜
15ｍ／分で矢印の様に通過させて測定した。なお、この
通過は、電力ケーブルか検査装置のいずれかを移動させ
て、相対的に長さ方向に進行させて行われる。1 and 2 schematically show an embodiment of the present invention. FIG. 1 is a side view and FIG. 2 is a front view. Test material 1
Is a black and glossy corrugated PVC resin-coated power cable with a diameter of 30 to 200 mm.
It was measured by passing it at 15 m / min as shown by the arrow. It should be noted that this passage is performed by moving either the power cable or the inspection device and relatively moving in the length direction.
【００１２】コルゲートの形状は、φ30mmでピッチ12mm
／深さ３mm乃至φ200mm でピッチ34mm／深さ６mmのサイ
ンカーブ様凹凸のある波付管で、検出する欠陥としては
全周、全長にわたり当面φ0.5mm 以上の穴、傷、汚れと
した。The corrugated shape is φ30 mm and pitch is 12 mm.
/ A corrugated tube with a depth of 3 mm to φ200 mm and a pitch of 34 mm and a depth of 6 mm with a sine curve-like unevenness. The defects to be detected were holes of 0.5 mm or more, scratches and dirt for the time being over the entire circumference and entire length.
【００１３】撮像カメラ２は、１／1000秒ＣＣＤシャッ
ターカメラを、図の様に、被検材１を中心としてその断
面直交方向に相対持して１組２台2A，2Bと、被検材１の
長さ方向に離れた2C，（2D…被検材の向う側に設置）の
２組の計４台を配置した。なお該カメラの受光面には、
ｆ８〜48mm電動ズームレンズ、クローズアップレンズNo
３、ｆ330 よりなるレンズ４を装着した。The imaging camera 2 has a 1/1000 second CCD shutter camera as shown in FIG. Two sets of 2C and 2C (2D ... installed on the opposite side of the material to be inspected) separated from each other in the length direction of 1 were arranged in total of 4 units. In addition, on the light receiving surface of the camera,
f8-48mm electric zoom lens, close-up lens No
3 and a lens 4 composed of f330 was attached.
【００１４】撮像カメラ２と被検材１との間には、被検
材１の表面光沢に応じた透過率50〜80％のハーフミラー
５を夫々１枚宛計４枚を取付けた。６は黒色ラシャ紙の
無反射板である。Between the image pickup camera 2 and the material to be inspected 1, a total of four half mirrors 5 each having a transmittance of 50 to 80% according to the surface gloss of the material to be inspected 1 are attached. Reference numeral 6 is a non-reflective plate made of black Racha paper.
【００１５】照明は、周囲照明装置３として、カメラの
設置されてない被検材１の断面直交する位置で、長さ方
向に離れて夫々高周波蛍光照明電源40Ｗ２台宛を3A，3
B，3C，（3D），3E，3F，3G，（3H）と８箇所16台取付
けた。（ ）は被検材の向う側に設置を示す。別にハー
フミラー用投光照明装置７として、同様の電源による６
Ｗ５台宛をハーフミラー４枚に対持して４箇所20台を取
付けた。なおこの投光照明装置７は50〜100 ％程度調光
できるようにした。Illumination is carried out as a peripheral illumination device 3 at a position orthogonal to the cross section of the material to be inspected 1 in which no camera is installed, apart from each other in the length direction, and each of the high frequency fluorescent illumination power supplies 40W is addressed to 3A, 3A.
B, 3C, (3D), 3E, 3F, 3G, (3H) and 16 units were installed at 8 locations. () Indicates installation on the opposite side of the test material. Separately, as a floodlighting device 7 for a half mirror,
We attached W5 units to 4 half mirrors, and installed 20 units at 4 locations. The floodlighting device 7 is designed to be capable of dimming about 50 to 100%.
【００１６】かく構成した検査装置により、被検材１の
全周表面には、ａハーフミラー用投光照明装置７の強
度、ｂ周囲照明装置３の強度並びにｃハーフミラー５の
透過比率（実施例では、 TiR＝７：３）のバランスによ
り、均一な照明が施され、カメラ自体の像や、凹凸によ
る乱反射が、欠陥部による乱反射との区別がつかないよ
うな影響を生じない様、精度を下げるか消去される。With the inspection device thus constructed, the intensity of the a half mirror floodlight illumination device 7, the intensity of the b ambient illumination device 3 and the transmission ratio of the c half mirror 5 are applied to the entire circumferential surface of the material 1 to be inspected. In the example, the balance of TiR = 7: 3) provides uniform illumination so that the image of the camera itself and the irregular reflection due to the irregularities do not cause an effect that is indistinguishable from the irregular reflection due to the defect. Is lowered or erased.
【００１７】従って、撮像カメラ２で映し、画像処理装
置８に送られたビデオ記号はアナログ微分により、デー
タ処理部９の検出レベルと対比されて欠陥が検出され
る。Therefore, the video symbol displayed by the image pickup camera 2 and sent to the image processing device 8 is compared with the detection level of the data processing section 9 by analog differentiation, and a defect is detected.
【００１８】図３は検出実例を示すための画面の説明図
で、14は被検材１の像、15の点線は画像の処理領域、Ｉ
は凸状の欠陥部16上の走査線、IIは凹状の欠陥部17上の
走査線の位置を示す。FIG. 3 is an explanatory view of a screen for showing an actual detection example. Reference numeral 14 is an image of the material to be inspected 1, dotted line 15 is an image processing area, I
Indicates the scanning line on the convex defect portion 16, and II indicates the position of the scanning line on the concave defect portion 17.
【００１９】図４（Ａ）は夫々画像処理前の走査線Ｉ，
IIで、前記の様な照明を行なっても、被検材１表面の照
度は不均一なため、欠陥16，17を検出するための検出レ
ベル01，02を設定しても、16，17と共に非欠陥の18の点
も欠陥として誤認し、被検材の表面状態による反射光量
の変動により安定検出は難しい。FIG. 4A shows scanning lines I before image processing,
Even if the above-mentioned illumination is performed in II, the illuminance on the surface of the test material 1 is not uniform, so even if the detection levels 01 and 02 for detecting the defects 16 and 17 are set, The 18 non-defect points are also mistakenly recognized as defects, and stable detection is difficult due to fluctuations in the amount of reflected light depending on the surface condition of the test material.
【００２０】従って、図４（Ｂ）に示す様に微分処理を
行なうと誤認のない安定した検出ができる。図中01は負
側の検出レベル、02は正側のレベルで、検出は一方を選
択するか又は両方を用いて行なわれる。Therefore, when the differential processing is performed as shown in FIG. 4B, stable detection can be performed without erroneous recognition. In the figure, 01 is a negative detection level, and 02 is a positive level, and detection is performed by selecting one or using both.
【００２１】図５は、これら画像処理を行う画像処理装
置８及びデータ処理部９の機能を示す説明図で、図示の
様に夫々次の通り機能する。FIG. 5 is an explanatory diagram showing the functions of the image processing apparatus 8 and the data processing unit 9 which perform these image processes, and each functions as follows as shown.
【００２２】イ. 検出信号 欠陥を検出した時に画像処理装置から出力される数百μ
sec のパルス信号。 ロ. ラッチ イの信号をレベル信号に変えるためのラッチ（保持）。 ハ. 画像メモリ、フリーズ、スルー ロの信号を画像メモリに入力し、欠陥を検出した画像そ
のものをフリーズ（保持）する。なお画像メモリは常時
書込み／読出しを行なうタイプで、ロの信号を書込み禁
止として入力することで画像がフリーズ（保持）され
る。常時書込み／読出しを行なっている時は入力画像と
出力画像は同じもの（スルー）。A. Detection signal Several hundred μ output from the image processing device when a defect is detected
Pulse signal of sec. B. Latch (holding) for converting the latchy signal into a level signal. C. Input the image memory, freeze, and through signals to the image memory, and freeze (hold) the image itself in which the defect was detected. Note that the image memory is of a type in which writing / reading is always performed, and the image is frozen (held) by inputting the signal b as write-protected. The input and output images are the same (through) when writing / reading at all times.
【００２３】ニ. 録画指令 ロの信号をパソコンに入力し、パソコンより画像記録装
置へ録画指令を行なう（ハで保持された画像を録画）。 ホ. 録画 録画が完了されたことをパソコンが知り、ロのラッチ信
号をクリアする。D. Input the signal of recording command B to the personal computer, and issue a recording command from the personal computer to the image recording device (record the image held by C). E. Recording The computer knows that the recording is completed and clears the latch signal of b.
【００２４】図６は別の実施例における検査装置の構成
を示す模式的正面図である。主要な撮像部は、被検材１
を通過せしめる直径450mm 、長さ630mm 、厚さ５mmのガ
ラス管10よりなる乳白色拡散筒を中心として、前記撮像
カメラ２、周囲照明装置３、ハーフミラー５、ハーフミ
ラー用投光照明装置７及び画像処理装置８並びにデータ
処理部９が、ローラ13によって作業面又はレール上を走
行する移動台14上にセットされたボックス12内に収納さ
れている。なおガラス管10の撮像カメラ位置には、夫々
撮像穴11が設けられている。FIG. 6 is a schematic front view showing the structure of the inspection apparatus in another embodiment. The main imaging unit is the test material 1
Centering around a milky white diffusion tube consisting of a glass tube 10 having a diameter of 450 mm, a length of 630 mm, and a thickness of 5 mm, through which the image pickup camera 2, ambient lighting device 3, half mirror 5, floodlight lighting device 7 for half mirror and image The processing unit 8 and the data processing unit 9 are housed in a box 12 set by a roller 13 on a moving table 14 that runs on a work surface or rail. An image pickup hole 11 is provided at each of the image pickup camera positions of the glass tube 10.
【００２５】[0025]
【発明の効果】本発明によれば、従来人により、全長、
全周に渡って、目視検査しなければならなかった電力ケ
ーブル等の波付管の外観検査が、自動的に正確に行なわ
れる。従って、操業が容易となると共に品質保証を充分
に行うことが出来る。According to the present invention, the length of the
The visual inspection of corrugated pipes such as power cables, which had to be visually inspected over the entire circumference, is automatically and accurately performed. Therefore, the operation can be facilitated and the quality can be sufficiently guaranteed.
【００２６】また、検査装置は被検材を通過させるガラ
ス管等の通過穴を囲んでボックスで防塵構造とし、移動
はレール上でスムースに行なわれ、照明、ハーフミラー
の選択、調整により、検出精度を更に上げることも期待
できるので、産業上極めて有益である。Further, the inspection apparatus has a dust-proof structure with a box surrounding a passage hole such as a glass tube through which the material to be inspected is passed, and the movement is smoothly performed on the rail, and detection is performed by selecting and adjusting the illumination and half mirror. Since it can be expected that the accuracy will be further improved, it is extremely useful in industry.
【図１】本発明の実施例を模式的に示す側面図である。FIG. 1 is a side view schematically showing an embodiment of the present invention.
【図２】図１の正面図である。FIG. 2 is a front view of FIG.
【図３】撮像画面の説明図である。FIG. 3 is an explanatory diagram of an image pickup screen.
【図４】（Ａ）（Ｂ）は夫々画像処理前後の説明図であ
る。4A and 4B are explanatory diagrams before and after image processing, respectively.
【図５】画像処理装置、データ処理部の機能の説明図で
ある。FIG. 5 is an explanatory diagram of functions of an image processing device and a data processing unit.
【図６】外観検査装置の構成を説明する模式的正面図で
ある。FIG. 6 is a schematic front view illustrating the configuration of the appearance inspection device.
【図７】（Ａ）（Ｂ）は夫々従来の画像処理方式を説明
する模式的側面図である。7A and 7B are schematic side views illustrating a conventional image processing method, respectively.
１ 電力ケーブルのコルゲート被覆表面等の被検材 ２ 撮像カメラ 2A，2B，2C，2D 各設置撮像カメラ ３ 周囲照明装置 3A，3B，3C，3D，3E，3F，3G，3H 各設置周囲照明装置 ４ 撮像カメラの前面に装着したレンズ ５ ハーフミラー ６ ハーフミラーに取付けた無反射板 ７ ハーフミラー用投光照明装置 ８ 画像処理装置 ９ データ処理部 10 ガラス管（乳白色拡散筒） 11 ガラス管の撮像穴 12 ボックス 13 ローラ 14 移動台 1 Test material such as corrugated surface of power cable 2 Imaging cameras 2A, 2B, 2C, 2D installed imaging cameras 3 Ambient lighting devices 3A, 3B, 3C, 3D, 3E, 3F, 3G, 3H installed surrounding lighting devices 4 Lens attached to the front of the imaging camera 5 Half mirror 6 Non-reflective plate attached to the half mirror 7 Floodlight illumination device for half mirror 8 Image processing device 9 Data processing unit 10 Glass tube (milky white diffusion tube) 11 Imaging of glass tube Hole 12 box 13 roller 14 carriage
Claims (4)
置と、該表面と直交する方角に受光面を有する撮像カメ
ラと、該表面と受光面との間のハーフミラーとを具備し
てなることを特徴とする波付管の外観検査装置。1. An illumination device for illuminating the surface of a corrugated tube to be inspected, an image pickup camera having a light-receiving surface in a direction orthogonal to the surface, and a half mirror between the surface and the light-receiving surface. Appearance inspection device for corrugated pipe.
明装置と、該表面と直交する方角に受光面を有する撮像
カメラと、該表面と受光面との間のハーフミラーと、該
ミラー用投光照明装置とを具備し、該表面よりの照明反
射光がハーフミラーによって制御されることを特徴とす
る波付管の外観検査方法。2. An ambient lighting device for illuminating the surface of a corrugated tube to be inspected, an imaging camera having a light-receiving surface in a direction orthogonal to the surface, a half mirror between the surface and the light-receiving surface, and the mirror. A projection inspection apparatus for a corrugated tube, comprising: a flood light illuminating device for use in illumination, wherein illumination reflected light from the surface is controlled by a half mirror.
が、相対的に長さ方向に進行する波付管に対して、夫々
その断面直交方向に複数個宛波付管を中心にして対設さ
れてなることを特徴とする請求項１記載の装置。3. An illuminating device, an imaging camera, and a half mirror are installed in opposition to a corrugated tube that travels relatively in the longitudinal direction, with a plurality of corrugated tubes centered in the direction orthogonal to the cross section thereof. The device of claim 1, wherein the device comprises:
して、照明装置、撮像カメラ、ハーフミラーを、夫々そ
の断面直交方向に複数個宛、波付管を中心にして対設、
具備することを特徴とする請求項２記載の方法。4. A corrugated tube that travels relatively in the longitudinal direction is provided with a plurality of lighting devices, image pickup cameras, and half mirrors in a direction orthogonal to the cross section of the corrugated tube. ,
The method of claim 2, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7136694A JPH07253402A (en) | 1994-03-15 | 1994-03-15 | External appearance inspecting apparatus for corrugated tube and inspecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7136694A JPH07253402A (en) | 1994-03-15 | 1994-03-15 | External appearance inspecting apparatus for corrugated tube and inspecting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07253402A true JPH07253402A (en) | 1995-10-03 |
Family
ID=13458441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7136694A Pending JPH07253402A (en) | 1994-03-15 | 1994-03-15 | External appearance inspecting apparatus for corrugated tube and inspecting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07253402A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006510876A (en) * | 2002-12-03 | 2006-03-30 | オー ジー テクノロジー インコーポレイテッド | Apparatus and method for detecting surface scratches on workpieces such as rolled and drawn metal bars |
| US7627163B2 (en) | 2002-12-03 | 2009-12-01 | Og Technologies, Inc. | Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar |
| WO2016194572A1 (en) * | 2015-05-29 | 2016-12-08 | 住友電装株式会社 | Wire harness inspection method and wire harness inspection device |
-
1994
- 1994-03-15 JP JP7136694A patent/JPH07253402A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006510876A (en) * | 2002-12-03 | 2006-03-30 | オー ジー テクノロジー インコーポレイテッド | Apparatus and method for detecting surface scratches on workpieces such as rolled and drawn metal bars |
| US7627163B2 (en) | 2002-12-03 | 2009-12-01 | Og Technologies, Inc. | Apparatus and method for detecting surface defects on a workpiece such as a rolled/drawn metal bar |
| WO2016194572A1 (en) * | 2015-05-29 | 2016-12-08 | 住友電装株式会社 | Wire harness inspection method and wire harness inspection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5355213A (en) | Inspection system for detecting surface flaws | |
| JP4615532B2 (en) | Defect inspection equipment, lighting equipment | |
| JPS61256237A (en) | Defect inspection for cyclic pattern | |
| JPH07253402A (en) | External appearance inspecting apparatus for corrugated tube and inspecting method | |
| JP2008286646A (en) | Surface flaw inspection device | |
| JP2010101692A (en) | Method and device for inspecting sheetlike article | |
| JP2001349716A (en) | Surface irregularity inspection method and device | |
| JP2002005845A (en) | Defect inspecting apparatus | |
| JPH0914942A (en) | Image pick-up device for inspection scratch on cylindrical surface | |
| JPH05307007A (en) | Surface inspecting method | |
| JP3668318B2 (en) | Method and apparatus for inspecting workpiece having reflecting surface | |
| JP3062293B2 (en) | Surface defect inspection equipment | |
| JPH0868767A (en) | Apparatus for inspecting flaw of body part of bottle | |
| JP2011075534A (en) | Curved-surface appearance inspection apparatus | |
| JPH0755720A (en) | Defect inspecting apparatus for transparent and opaque films | |
| JP2011043415A (en) | Detection method and device of deposit on glass plate surface | |
| JP2018048981A (en) | Pipe material inspection device | |
| JPS5910850Y2 (en) | Visual inspection device using television camera | |
| CN115112677A (en) | Method and device for detecting surface defects of optical fiber image transmission element | |
| JP2005308517A (en) | Outside surface inspection method and outside surface inspection device | |
| CN104677918B (en) | Detector for CCD image sensor of display screen backlight plate | |
| JP2000121574A (en) | Flaw inspection apparatus for steel plate | |
| JPH09218162A (en) | Surface defect inspection device | |
| US20070115460A1 (en) | Method for examining molds and apparatus for accomplishing the same | |
| JP3463250B2 (en) | Device for supporting inspection object in optical inspection device |