公开(公告)号：US20240302697A1

公开(公告)日：2024-09-12

申请号：US18119911

申请日：2023-03-10

Applicant: Meta Platforms Technologies, LLC

Inventor： Sawyer MILLER ,  Hsien-Hui CHENG ,  Brian DAUGHERTY ,  Hannah NOBLE ,  Michael ESCUTI ,  Lu LU

IPC: G02F1/13363 ,  G02F1/1334 ,  G02F1/1335

CPC classification number: G02F1/133638 ,  G02F1/1334 ,  G02F1/133526 ,  G02F1/133636 ,  G02B27/0172

Abstract: An achromatic wave plate using multiple twisted nematic liquid crystal polymer films or negative dispersion A-plate films is described. Each layer of twisted nematic liquid crystal polymer film aligns a next layer during forming achieving a monolithic structure. The achromatic wave plate with multiple layers of negative dispersion A-plate material has a non-continuous, easy to fabricate structure. Both types of films may be flexible and allow application to curved surfaces. The films of both examples also allow for high achromaticity in forward and backward propagation, thus, permitting the wave plate to operate as an optical isolator. A quarter wave of retardance across the entire visible spectrum and up to a 30-degree angle of incidence may be achieved.