Cathode ray tube-use glass panel and inspection method therefore and inspection device therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Sep 14, 2006
app pub date -
Apr 14, 2003
filing date -
Apr 17, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Ultrasonic waves are used to detect the size and the depth of an internal defect S in the face portion 2 of a panel 1. Preferably, the ultrasonic wave is transmitted from the outer surface 2a side of the face portion 2 toward the inner surface 2b to receive a reflected wave reflected on the inner surface 2b side, thereby detecting the size of the internal defect S and the distance of the internal defect S from the inner surface 2a. Upon transmission and reception of the ultrasonic wave, the ultrasonic wave is allowed to propagate through a non-compressive fluid as a medium outside the face portion 2.
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