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:
Jun. 29, 1993
Filed:
Feb. 25, 1991
Nobuyuki Zumoto, Amagasaki, JP;
Toshinori Yagi, Amagasaki, JP;
Yasuhito Myoi, Amagasaki, JP;
Yoshie Uchiyama, Amagasaki, JP;
Masaaki Tanaka, Amagasaki, JP;
Teruo Miyamoto, Amagasaki, JP;
Masao Izumo, Amagasaki, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An optical machining apparatus for irradiating light from a light source onto a source to be machined to form a grooves in the surface. The apparatus uses a mask disposed in the path of light from the light source. The mask includes reflective parts for reflecting the light from the light source. The reflective parts are on a first surface of the mask. The mask also includes a reflection member for returning the light reflected at the reflective parts of the mask toward the mask.