The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2003
Filed:
Sep. 14, 2001
Masato Moriya, Hirabsuka, JP;
Tadayuki Hanamoto, Hirabsuka, JP;
Kazuhiro Mimura, Hirabsuka, JP;
Toshirou Kotooka, Omura, JP;
Komatsu Denshi Kinzoku Kabushiki Kaisha, Hiratsuka, JP;
Abstract
A melt level detector is provided for detecting the melt level of a CZ furnace by triangulation. The laser beam ( ) from a laser source ( ) is moved in radial directions of a crucible ( ) in the CZ furnace to find a location where a photodetector system ( ) can receive the reflection ( ) from the melt level ( ), and the laser beam ( ) is fixed at the location. Since the measurements thus take place within an extremely small angular range of the laser beam, the melt level ( ) can be detected with little effect of noise on the melt level ( ) while eliminating complexity of the device.