Apparatus and method for inspecting light transmittable material
In an inspection device, an inspection light projector and an auxiliary light emitter respectively project an inspection light and auxiliary light onto a position of a filmstrip. After transmitting the filmstrip, the inspection light is received by a defect detector. When receiving the inspection li...
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| creator | Yamaguchi, Yukihiko Murai, Koichi |
| description | In an inspection device, an inspection light projector and an auxiliary light emitter respectively project an inspection light and auxiliary light onto a position of a filmstrip. After transmitting the filmstrip, the inspection light is received by a defect detector. When receiving the inspection light, the defect detector generates a data signal and sends it to a controller. In the controller, a threshold of a level of the data signal is memorized, and the level of the data signal is compared with the threshold. If the level of the data signal becomes under the threshold, the controller determines that the filmstrip has a coloring defect. Further, if there is a dust on the filmstrip, the level of the data signal becomes higher. Because the auxiliary light is diffused by the dust, and a part of the auxiliary light is received by the defect detector. |
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After transmitting the filmstrip, the inspection light is received by a defect detector. When receiving the inspection light, the defect detector generates a data signal and sends it to a controller. In the controller, a threshold of a level of the data signal is memorized, and the level of the data signal is compared with the threshold. If the level of the data signal becomes under the threshold, the controller determines that the filmstrip has a coloring defect. Further, if there is a dust on the filmstrip, the level of the data signal becomes higher. 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After transmitting the filmstrip, the inspection light is received by a defect detector. When receiving the inspection light, the defect detector generates a data signal and sends it to a controller. In the controller, a threshold of a level of the data signal is memorized, and the level of the data signal is compared with the threshold. If the level of the data signal becomes under the threshold, the controller determines that the filmstrip has a coloring defect. Further, if there is a dust on the filmstrip, the level of the data signal becomes higher. Because the auxiliary light is diffused by the dust, and a part of the auxiliary light is received by the defect detector.</abstract><oa>free_for_read</oa></addata></record> |
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| title | Apparatus and method for inspecting light transmittable material |
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