Method for measuring curvature of mirror

Abstract

Abstract PURPOSE:To rapidly and easily measure the curvature of a mirror with high accuracy, by contacting the respective lower ends of three measuring levers with the surface of the mirror in a vertical state under their own wt. and relatively moving said levers on the mirror. CONSTITUTION:The displacement meters 8a, 8b, 8c are mounted to an arm 7 and respectively vertically support lever shaped measuring elements 9a, 9b, 9c in a freely slidable manner while the slide table 10 on a base 5 has a structure capable of horizontally and reciprocally driving to the directions shown by a double arrow X-X' and a mirror 4 is mounted on said table 10 and three lever shaped measuring elements are contacted with the mirror 4 under their own wt. When the table 10 is moved to an X-axis direction, the measuring elements 9a, 9b, 9c are displaced in the up-and-down direction corresponding to the surface state of the mirror and, therefore, the displacement meters 8a, 8b, 8c respectively electrically measure the displacement quantities of said measuring elements to output the same. The output signals are inputted to a computer and radii at a large number of points are calculated to be displayed on CRT display.

Inventors

• 👤 Takeo Matsumoto
• 👤 武夫 松本
• 👤 Kohei Matsuyama
• 👤 松山　浩平

Bibliographic Details