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:
Mar. 25, 2003
Filed:
Feb. 27, 2001
Hitoshi Ohmori, Wako, JP;
Yutaka Yamagata, Wako, JP;
Sei Moriyasu, Tokyo, JP;
Shinya Morita, Tokyo, JP;
Katsuhiko Kada, Kyotu-fu, JP;
Hidetaka Kira, Joyo, JP;
Hiroyuki Sasai, Kyoto, JP;
Masaru Kawata, Takatsuki, JP;
Other;
Abstract
An electrolytic in-process dressing device is provided with a disk-shaped metal-bonded grindstone with a surface with a circular arc shape with a radius R at its outer periphery and a numerical control device . The disk-shaped metal-bonded grindstone rotates around an axis Y, and the grindstone is dressed electrolytically while the device grinds the workpiece . The numerical control device is provided with a rotary truing device that rotates around the X axis that orthogonally crosses the axis of rotation Y and trues the circular arc surface , a shape measuring device for measuring the shape of the circular arc surface of the grindstone and the shape of the processed surface of workpiece on the machine, and controls the grindstone numerically in the three directions along the axes X, Y and Z. The numerical control device moves the grindstone in three axial directions and repeats the operations of truing, grinding and measurements on-line. Thus, an axially asymmetrical aspheric mirror with a highly accurate shape and extremely low surface roughness, that can precisely reflect or converge light can be manufactured within a short time with a high accuracy.