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:
Nov. 29, 2022
Filed:
Nov. 20, 2019
Dmg Mori Co., Ltd., Nara, JP;
Akinori Suzuki, Kanagawa, JP;
Masayuki Niiya, Kanagawa, JP;
Kenji Matsushita, Kanagawa, JP;
Terukazu Nishida, Kanagawa, JP;
Hideaki Tamiya, Kanagawa, JP;
Kayoko Taniguchi, Kanagawa, JP;
Dmg Mori Co., Ltd., Nara, JP;
Abstract
A displacement detection device is capable of stably and accurately detecting an amount of displacement. A polarization maintaining fiber has a length not to be equal to a length obtained by dividing, a product of an integral multiple of twice a length of a resonator times a refractive index of the resonator and a beat length obtained from a difference between propagation constants of two polarization modes, by a wavelength of the light source, is selected from a range including a length equal to the above length. The polarization maintaining fiber includes multiple polarization maintaining fibers fitted to each other by removable connectors.