Optics: measuring and testing – By monitoring of webs or thread – For flaws or imperfections
Reexamination Certificate
2007-10-23
2007-10-23
Punnoose, Roy M. (Department: 2886)
Optics: measuring and testing
By monitoring of webs or thread
For flaws or imperfections
C356S237100
Reexamination Certificate
active
10498695
ABSTRACT:
A surface of copper foil wound onto a guide roller26is irradiated with light. Specular light from the copper foil surface is received by CCD cameras14a,and scattered light from the copper foil surface is received by CCD cameras14b.When, in a region in which the amount of specular light received by the CCD cameras14ais equal to or larger than a first threshold, a portion having a luminance equal to or larger than a second threshold is present, and when the amount of scattered light received by the CCD cameras14bis smaller than a luminance average, that region is determined to be a defective copper portion.
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Fujiwara Jun
Inoue Ayumu
Yamabe Koji
Zhou Qing Wei
Kokusai Gijutsu Kaihatsu Co. Ltd.
McCracken & Frank LLP
Mitsui Mining & Smelting Co. Ltd.
Punnoose Roy M.
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