Other

Masaru Kawata

Shinya Morita

Hitoshi Ohmori

Yutaka Yamagata

Sei Moriyasu

Hiroyuki Sasai

Hidetaka Kira

Katsuhiko Kada

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.

Method of grinding an axially asymmetric aspherical mirror

Growing community of inventors

Takatsuki, Japan

Masaru Kawata