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. 06, 2020
Filed:
Feb. 04, 2019
Gigaphoton Inc., Tochigi, JP;
Hirotaka Miyamoto, Oyama, JP;
Osamu Wakabayashi, Oyama, JP;
Gigaphoton Inc., Tochigi, JP;
Abstract
A laser apparatus includes first and second wavelength dispersion elements, an optical element, first and second actuators, and a control unit. The first wavelength dispersion element generates wavelength dispersion in a direction orthogonal to an electric discharge direction between a pair of electric discharge electrodes. The second wavelength dispersion element generates wavelength dispersion in a direction parallel to the electric discharge direction. The optical element corrects wavelength dispersion generated by the second wavelength dispersion element. The first actuator drives the first wavelength dispersion element. The second actuator drives the optical element. The control unit controls the first actuator so that the center wavelength of the laser light approaches to a target wavelength and controls the second actuator so as to correct the wavelength dispersion generated by the second wavelength dispersion element.