| 摘要 |
PURPOSE:To obtain a reflecting mirror having an ultrafine accuracy by executing Hartmann test for the cut surface and controlling cutting according to the results of the above-mentioned measurement. CONSTITUTION:When the non-cut surface 2c of a metal mirror 2 to be worked is cut by a diamond bite 10, and measuring beams 13 and reference beams 4 are irradiated from a light source part 1, the reflected beams of said beams 3 and 4 are detected by a position detector 13, and then each tilt of the immediately cut surface 2b and the cut surface 2c cut prior to the cutting operation for the surface 2b is measured, and then the position of the share point of the bite 10 is controlled through a controller 16, on the basis of the measured values discribed in the above. Therefore, all the surfaces have been measured through Hartmann test when cutting is completed, and ultrafine work has been completed. |
