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:
Aug. 24, 2021
Filed:
Aug. 22, 2019
Applicants:
Hamamatsu Photonics K.k., Hamamatsu, JP;
Kyoto University, Kyoto, JP;
Inventors:
Assignees:
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Kyoto University, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 33/26 (2006.01); G01R 33/032 (2006.01); G01N 24/00 (2006.01); H01S 3/091 (2006.01);
U.S. Cl.
CPC ...
G01R 33/26 (2013.01); G01N 24/006 (2013.01); G01R 33/032 (2013.01); G01R 33/0322 (2013.01); H01S 3/091 (2013.01);
Abstract
A cell for a optically pumped magnetic sensor measures magnetic field by setting alkali metal atoms to a predetermined excitation state by a pump beam and detecting the excitation state by a probe beam. The cell is provided with a glass substrate which seals the alkali metal atoms and an enclosing gas and transmits the pump beam and the probe beam and a coating layer provided on an inner surface of the glass substrate. The coating layer is made of an inorganic material.