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:
Jan. 22, 2002
Filed:
Aug. 27, 1998
Burkhard Altekrüger, Alzenau, DE;
Joachim Aufreiter, Alzenau, DE;
Dieter Brüss, Bruchköbel, DE;
Klaus Kalkowski, Gründau, DE;
Leybold Systems GmbH, Hanau, DE;
Abstract
A device and process for the determination of the diameters of a crystal that is pulled from a liquified material. In this connection several video cameras are provided, each of which reproduces its own section along the vertical axis of the crystal or in a direction vertical to it. The image angles of the camera are laid out in such a way that the object to be reproduced completely fills the entire picture plane—at least in one direction. For objects with a small diameter; e.g., the crystal neck, a camera with a small image angle is used, while for objects with a large diameter; e.g., the crystal body, a camera with a large image angle is used.