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:
Dec. 16, 1997
Filed:
Jan. 17, 1996
Miki Kurosawa, Aichi, JP;
Yutaka Motoki, Aichi, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A laser machining system having a mirror for transmitting or reflecting laser light providing a sufficient light amount and light generated at a laser radiation point without degrading the laser light quality. A phase difference control mirror, which has a dielectric multilayer film as an optical film which allows light of a wavelength other than laser light to pass therethrough and which reflects the laser light almost 100% while the phase difference between S and P polarization components of the laser light before the laser light is reflected is substantially maintained, is provided in place of an optical path mirror located in an optical transmission line, whereby light of a wavelength other than that of the laser light can be extracted from the light generated at a laser radiation point on a workpiece during laser machining, and the extracted light is detected by an optical sensor.