公开(公告)号：US20240313140A1

公开(公告)日：2024-09-19

申请号：US18603095

申请日：2024-03-12

Applicant: Snap Inc.

Inventor： Cheng Shi ,  Xinya Xu

IPC: H01L31/0445 ,  G02B1/11 ,  G02B5/00 ,  H01L31/053 ,  H01L31/076

CPC classification number: H01L31/0445 ,  G02B1/11 ,  G02B5/003 ,  H01L31/053 ,  H01L31/076

Abstract: An augmented reality system can include a waveguide having an edge surface that extends between opposing light-guiding surfaces. The waveguide can guide light toward the edge surface. The waveguide can include a reflectivity-reducing film, such as an absorptive film or a photovoltaic film, disposed on the edge surface. To form the reflectivity-reducing film, curable material can be disposed onto a dissolvable film. The curable material can be cured while disposed on the dissolvable film such that the cured material forms a reflectivity-reducing structure on the dissolvable film. The dissolvable film can be dissolved such that the reflectivity-reducing structure remains intact as a reflectivity-reducing film that can be adhered to the edge surface, such as with a primer layer. The edge surface can include nanostructures, sized smaller than half a wavelength of the guided light, that can reduce a reflectivity of the edge surface.