計算機ホログラムを用いた非球面の干渉測定
1976 年 5 巻 6 号 p. 228-232
詳細
1976 年 5 巻 6 号 p. 228-232
The application of computer-generated holograms to the interferometric testing of aspheric surfaces is described.
When small F-number optical elements are tested, the required sample number of the hologram should be much increased. In order to reduce the sample number of the hologram, we propose the aberration balancing method. The optimum value of the defocus aberration is calculated. Errors due to the incorrect hologram size and due to misalignment of the optical system are estimated, and they are compared with errors in the case of conventionalmethods. Experimental results are shown for testing aspheric mirror of F/2.
