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. 25, 2022
Filed:
Jun. 12, 2018
Hamamatsu Photonics K.k., Hamamatsu, JP;
Helmut Teichmann, Solothurn, CH;
Andreas Durandi, Solothurn, CH;
Peter Seitz, Solothurn, CH;
Takashi Kasahara, Hamamatsu, JP;
Katsumi Shibayama, Hamamatsu, JP;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Abstract
An optical filter system includes a Fabry-Perot interference filter, and a controller that controls the Fabry-Perot interference filter. The Fabry-Perot interference filter includes a first mirror portion, a second mirror portion, a first driving electrode and a first monitor electrode provided with the first mirror portion, and a second driving electrode and a second monitor electrode provided with the second mirror portion. The controller includes a control unit that calculates an electrostatic capacitance between the first mirror portion and the second mirror portion based on an alternating voltage generated between the first monitor electrode and the second monitor electrode while an alternating current is applied between the first monitor electrode and the second monitor electrode.