US 11,789,182 B2
Micro concave-convex structure for optical body and display device
Shunichi Kajiya, Tokyo (JP); Asahiko Nogami, Tokyo (JP); Kyoko Sakurai, Tokyo (JP); and Kazuya Hayashibe, Tokyo (JP)
Assigned to DEXERIALS CORPORATION, Tokyo (JP)
Filed by DEXERIALS CORPORATION, Tokyo (JP)
Filed on Mar. 10, 2022, as Appl. No. 17/691,527.
Application 17/691,527 is a continuation of application No. 15/771,960, granted, now 11,307,328, previously published as PCT/JP2016/079542, filed on Oct. 4, 2016.
Claims priority of application No. 2015-215135 (JP), filed on Oct. 30, 2015.
Prior Publication US 2022/0196884 A1, Jun. 23, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 1/118 (2015.01)
CPC G02B 1/118 (2013.01) 9 Claims
OG exemplary drawing
 
1. An optical body comprising:
a concave-convex structure formed on a surface of a base material,
wherein an average period of concavities and convexities of the concave-convex structure is equal to or shorter than a wide wavelength band including a visible light band,
a standard deviation of differences between respective positions of bottom faces of all the concavities of the concave-convex structure in a normal direction of a flat surface of the base material and a median of the positions of all the bottom faces is greater than or equal to 25 nm, and
a standard deviation of differences between respective positions of vertexes of all the convexities of the concave-convex structure in the normal direction of the flat surface of the base material and a median of the positions of all the vertexes is greater than or equal to 35 nm.