OPTICAL DEVICE
    1.
    发明申请

    公开(公告)号:US20220373718A1

    公开(公告)日:2022-11-24

    申请号:US17771504

    申请日:2020-10-26

    IPC分类号: G02B1/118 G02B5/20

    摘要: The present invention relates to an optical device (1) suitable for transmitting/reflecting electromagnetic radiation in a wavelength range of the electromagnetic spectrum, said device (1) comprising at least: a first coating layer (10) made of a first material, a substrate (50) made of a material that is different from the first material, and surface texturing (60) forming cavities (61) in the device (1); wherein a lower layer (50) disposed directly below the first coating layer (10) is either a second coating layer (20) made of a material that is different from the first material, or the substrate (50); wherein the lower layer (50) has a determined thickness (E50); characterised in that the cavities (61) extend through the coating layer (20) and are sunk into the lower layer (50) through at least part of the thickness (E50).