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:
Feb. 26, 2008
Filed:
Aug. 31, 2005
Atsushi Ono, Tokyo, JP;
Toshiyuki Okayasu, Tokyo, JP;
Akihiro Fujimoto, Tokyo, JP;
Masashi Shibata, Tokyo, JP;
Atsushi Ono, Tokyo, JP;
Toshiyuki Okayasu, Tokyo, JP;
Akihiro Fujimoto, Tokyo, JP;
Masashi Shibata, Tokyo, JP;
Advantest Corporation, Tokyo, JP;
Abstract
A test apparatus including an optical coupler for optically coupling a main frame and a test head is provided. The optical coupler has a plurality of optical fiber cables, a cable storage chain for bundling a stored portion except for a non-stored portion in a part of the test head side and a non-stored portion in a part of the main frame side of the plurality of optical fiber cables and storing the same, a test head side cable storage unit provided at the boundary between the non-stored portion and the stored portion of the plurality of optical fiber cables on the test head side and being capable of adjusting a length for storing therein the non-stored portion on the test head side and a main frame side cable storage unit provided at the boundary between the non-stored portion and the stored portion of the plurality of optical fiber cables on the main frame side and being capable of adjusting a length for storing therein the non-stored portion on the main frame side.