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:
Oct. 21, 2008
Filed:
Sep. 13, 2004
Jiro Suzuki, Tokyo, JP;
Yoshihito Hirano, Tokyo, JP;
Yutaka Ezaki, Tokyo, JP;
Yasushi Horiuchi, Tokyo, JP;
Jiro Suzuki, Tokyo, JP;
Yoshihito Hirano, Tokyo, JP;
Yutaka Ezaki, Tokyo, JP;
Yasushi Horiuchi, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Provided are a small-sized, low-cost, and easy-to-use laser optical path length difference detecting device, a laser optical path length difference detecting device, and a coherent optical coupling device. The laser optical path length difference detecting device detects an optical path length difference between propagation paths of a first laser beam () and a second laser beam (), which are mutually coherent when the beams are propagated through two arbitrary optical paths of a plurality of laser beam optical paths. The laser optical path length difference detecting device is provided with an optical path length difference variable means () for changing the optical path length difference between the first laser beam () and the second laser beam (), a wavefront inclination generating means () for inclining a wavefront of at least one of the first laser beam () and the second laser beam (), and a two-dimensional detector () for detecting the interference light intensity distribution of the first laser beam () and the second laser beam () which have passed through the wavefront inclination generating means.