公开(公告)号：US11112540B2

公开(公告)日：2021-09-07

申请号：US16577178

申请日：2019-09-20

Applicant: ENEOS CORPORATION

Inventor： Ayano Takeshita ,  Kaori Takano ,  Madoka Takahashi ,  Takashi Seki

IPC: G02B1/18 ,  B29C59/02 ,  G02B27/00

Abstract: An antifogging member has an concave-convex surface defined by convex portions and concave portions, a Fourier-transformed image obtained by applying two-dimensional fast-Fourier transform processing to an observation image of the concave-convex surface exhibits a circular or annular pattern having an origin for which the absolute value of the wave number is 0 μm−1 as the substantial center thereof, the convex portions and the concave portions extend in random directions in plan view, the average pitch of the concave portions and convex portions of the concave-convex surface is in the range of 50-250 nm, and the water contact angle on a smooth surface formed from the material constituting the concave-convex surface is 90 degrees or less. The antifogging member has high abrasion resistance, minimal haze, and a small difference in chromaticity and transmittance when viewed from oblique and perpendicular directions, and the transmittance and chromaticity thereof are not azimuth dependent.