Method and apparatus for working optical element mold



【課題】 曲率半径の小さいレンズ形状の凹部を形成することができる光学素子金型の加工方法及び加工装置を提供する。 【解決手段】 被加工物1Aを切削するダイヤモンドバイト3を用いて加工して、複数の独立した光学機能面を有する光学素子を成形するためのマイクロレンズ金型1を作成する加工方法において、ダイヤモンドバイト3をX軸方向へ移動させ、この移動と同時にY軸周りにダイヤモンドバイト3を回転させ、更にZ軸方向へ被加工物1Aを移動させて被加工物1Aの加工面2を切削する。その後、被加工物1Aを所定ピッチだけY軸方向へ移動させる。上記切削と移動とを繰返して凹部2aを形成する。 【選択図】 図1
PROBLEM TO BE SOLVED: To provide a method and apparatus for working an optical element mold which can form a recess in the shape of a lens with a small radius of curvature. SOLUTION: In a working method for manufacturing a micro-lens mold 1 for molding the optical element having a plurality of independent optical function surfaces by working with the use of a diamond turning tool 3 for cutting a workpiece 1A, the diamond bit 3 is moved in the X-axis direction and simultaneously rotated around the Y-axis, and the workpiece 1A is moved in the Z-axis direction to cut the working surface 2 of the workpiece 1A. After that, the workpiece 1A is moved by a prescribed pitch in the Y-axis direction. The cutting and the movement are repeated to form the recess 2a. COPYRIGHT: (C)2007,JPO&INPIT




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