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Coated Glossy Surface, Engraved Mark Inspection |
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Oblique Lighting Prevents Glare and Irradiates Long Workpieces Uniformly |
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Detection of Insufficient Coating on Terminal |
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| Insufficient coating of terminal tip is detected. Through color processing, the silver color of the ground metal and gold color coating can be distinguished although it is almost impossible in the case of black and white processing. |
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In the case of simple reflected light |
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| Color difference is indistinct and the surface gloss results in uneven irradiation. |
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In the case of bar light |
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| The color difference between gold and silver is distinguished and the unevenness of the gloss minimized. |
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Lighting Technique of the Bar Type Light |
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| A bar light allows uniform irradiation over a large area. In order to prevent regular reflected light which causes halation to occur, the bar light is fixed at an angle. The diffused reflected light is used for photography and detection. In addition, the use of a polarizing filter is also effective for excessive glossiness. |
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Coaxial Illumination Captures the Light of a Glossy Surface and Releases Light at the Edges of an Engraved Mark |
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Detection of an Engraved Mark of a Pressed Part |
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| The engraved mark of a part number or specification is recognized by the pattern shape in order to detect a wrong mark or part. |
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In the case of simple reflected light |
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| The engraved marks are unclear. |
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In the case of coaxial vertical illumination |
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| The edges of the engraved marks stand out. |
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Coaxial Vertical Illumination Lighting Technique |
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| The coaxial vertical illumination method irradiates light from the same axis of the lens. By irradiating regular reflected light from the glossy surface and releasing diffused light at the edges of the engraved mark, the light and shade of the object can be captured and detected. |
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