发明名称 |
METHOD AND APPARATUS FOR DETECTING MELT LEVEL |
摘要 |
<p>A melt level detector is provided for detecting the melt level of a CZ furnace by triangulation. The laser beam (2) from a laser source (1) is moved in radial directions of a crucible (14) in the CZ furnace to find a location where a photodetector system (5, 7) can receive the reflection (4) from the melt level (3), and the laser beam (2) is fixed at the location. Since the measurements thus take place within an extremely small angular range of the laser beam, the melt level (3) can be detected with little effect of noise on the melt level (3) while eliminating complexity of the device. <IMAGE></p> |
申请公布号 |
EP1162291(A1) |
申请公布日期 |
2001.12.12 |
申请号 |
EP20000909680 |
申请日期 |
2000.03.16 |
申请人 |
KOMATSU DENSHI KINZOKU KABUSHIKI KAISHA |
发明人 |
MORIYA, MASATO;HANAMOTO, TADAYUKI;MIMURA, KAZUHIRO;KOTOOKA, TOSHIROU |
分类号 |
C30B15/26;C30B29/06;(IPC1-7):C30B15/26 |
主分类号 |
C30B15/26 |
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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