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. 20, 2026
Filed:
Feb. 26, 2021
Ntt, Inc., Tokyo, JP;
Daisuke Iida, Musashino, JP;
Yoshitaka Enomoto, Musashino, JP;
Chihiro Kito, Musashino, JP;
Tatsuya Okamoto, Musashino, JP;
Yusuke Koshikiya, Musashino, JP;
Yoshifumi Wakisaka, Musashino, JP;
Nazuki Honda, Musashino, JP;
NTT, Inc., Tokyo, JP;
Abstract
The present disclosure is an optical line test system that detects a distribution of loss points of an optical line in a longitudinal direction, using a coherent light measurement device, applies vibration to facility disposed on a path of the optical line, detects a vibration point of the optical line in a longitudinal direction upon applying the vibration, using the coherent light measurement device, and identifies the loss point based on correspondence between the detected loss point and vibration point.