Patents Assigned to SUMITOMO HEAVY INDUSTRIES, LTD., a Japanese corporation
  • Method for making marks in a transparent material by using a laser
    Publication number: 20010028390
    Abstract: An object to be marked is prepared. Laser beam of a wavelength that is transmitted by the material from which this object to be marked is formed is focused on the inner portion of said object to be marked, using an f&thgr; lens. A mark is formed in the region of the object to be marked where the laser beam is focused. The mark is positioned inside the object to be marked and does not extend to the surface thereof. Therefore, generation of dirt caused by marking, rupturing of the object to be marked, and the like, can be prevented.
    Type: Application
    Filed: June 12, 2001
    Publication date: October 11, 2001
    Applicant: SUMITOMO HEAVY INDUSTRIES, LTD., a Japanese corporation
    Inventor: Kenichi Hayashi
  • Method for making marks in a transparent material by using a laser
    Publication number: 20010028385
    Abstract: An object to be marked is prepared. Laser beam of a wavelength that is transmitted by the material from which this object to be marked is formed is focused on the inner portion of said object to be marked, using an f&thgr; lens. A mark is formed in the region of the object to be marked where the laser beam is focused. The mark is positioned inside the object to be marked and does not extend to the surface thereof. Therefore, generation of dirt caused by marking, rupturing of the object to be marked, and the like, can be prevented.
    Type: Application
    Filed: June 12, 2001
    Publication date: October 11, 2001
    Applicant: SUMITOMO HEAVY INDUSTRIES, LTD., a Japanese corporation
    Inventor: Kenichi Hayashi