公开(公告)号：US20210302639A1

公开(公告)日：2021-09-30

申请号：US16627638

申请日：2019-07-12

Applicant: DEXERIALS CORPORATION

Inventor： Shigeshi SAKAKIBARA ,  Akio TAKADA ,  Kazuyuki SHIBUYA ,  Toshiaki SUGAWARA ,  Yuusuke MATSUNO

IPC: G02B5/30

Abstract: A polarizing plate having excellent optical properties includes: a transparent substrate that is transparent to light in a used wavelength band; grid-shaped protrusions arranged on the transparent substrate at a pitch shorter than the wavelength of light in the used band, extending in a predetermined direction, and has a reflective layer and a reflection control layer; and a groove which is recessed between the grid-shaped protrusions and whose width in a direction orthogonal to the predetermined direction is reduced to zero in the depth direction. This improves transmittance and reflectance properties, thereby achieving excellent optical properties.