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1. (WO2017150335) METHOD FOR MANUFACTURING LENS MOLD AND LENS MOLD

Pub. No.:    WO/2017/150335    International Application No.:    PCT/JP2017/006855
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Fri Feb 24 00:59:59 CET 2017
IPC: C25D 11/12
B29C 33/38
B29C 59/02
C25D 11/04
C25D 11/06
C25D 11/16
C25D 11/24
G02B 1/118
G02B 3/00
B29L 11/00
Applicants: SHARP KABUSHIKI KAISHA
シャープ株式会社
Inventors: YAMADA Miho
山田 美穂
MINOURA Kiyoshi
箕浦 潔
NAKAHARA Takahiro
中原 隆裕
Title: METHOD FOR MANUFACTURING LENS MOLD AND LENS MOLD
Abstract:
A method for manufacturing a lens mold having at least one inverted optical curved surface (22) on the surface thereof includes (a) a step for preparing an aluminum base material (10A) having a plurality of inverted optical curved surfaces (22) on the surface thereof or a step for preparing mold base material (10B), which is mold base material (10B) having a base material (12) and an aluminum layer (16) supported on the base material and having a plurality of inverted optical curved surfaces (22) on the surface thereof, (b) a step for forming a porous alumina layer (18) having a plurality of minute recesses (18p) by anodizing the surface of the aluminum base material or aluminum layer, and (c) a step for enlarging the plurality of minute recesses (18p) in the porous alumina layer by bringing the porous alumina layer into contact with an etching fluid.