发明名称 |
Apparatus for and method of inspecting sheet body |
摘要 |
When a film is rewound, light is applied from light-emitting units to the film, and light that has passed through the film is detected by light-detecting units to detect a plurality of inclined defects in the film based on a change in the intensity of the light transmitted through the film. Slits oriented in the direction of the inclined defects are disposed in front of the light-emitting units and the light-detecting units. Detected signals outputted from the light-detecting units are transmitted to a processing device and processed thereby. The processing device processes the signals by approximating a maximum value array of extremal values of the signals in respective reference lengths of the film, with two functions in zones, and identifying a boundary between the zones as a position where a defect disappears.
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申请公布号 |
US6927408(B2) |
申请公布日期 |
2005.08.09 |
申请号 |
US20020176054 |
申请日期 |
2002.06.21 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
ONISHI KAZUO;NISHIDA HIROYUKI |
分类号 |
G01B11/06;G01N21/89;G01N21/892;(IPC1-7):G01N21/88 |
主分类号 |
G01B11/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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