Patents by Inventor Tatsuaki Nagai

Tatsuaki Nagai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Laser machining device and laser machining method
    Patent number: 11005228
    Abstract: To appropriately change an output of laser light without deteriorating laser characteristics. A control section of a laser machining device controls, when a target output is larger than a predetermined threshold, an output of laser light by changing a driving current supplied to an excitation light source and, on the other hand, controls, when the target output is equal to or smaller than the threshold, the output of the laser light by changing a duty ratio of a Q switch while keeping the driving current supplied to the excitation light source substantially fixed.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: May 11, 2021
    Assignee: KEYENCE CORPORATION
    Inventors: Masao Sato, Tatsuaki Nagai
  • Laser Machining Device And Laser Machining Method
    Publication number: 20190190228
    Abstract: To appropriately change an output of laser light without deteriorating laser characteristics. A control section of a laser machining device controls, when a target output is larger than a predetermined threshold, an output of laser light by changing a driving current supplied to an excitation light source and, on the other hand, controls, when the target output is equal to or smaller than the threshold, the output of the laser light by changing a duty ratio of a Q switch while keeping the driving current supplied to the excitation light source substantially fixed.
    Type: Application
    Filed: October 23, 2018
    Publication date: June 20, 2019
    Applicant: Keyence Corporation
    Inventors: Masao Sato, Tatsuaki Nagai