Methods for laser processing a substrate stack having one or more transparent workpieces and a black matrix layer

    公开(公告)号:US11059131B2

    公开(公告)日:2021-07-13

    申请号:US16430985

    申请日:2019-06-04

    Abstract: A method for laser processing a substrate stack includes forming a defect in a transparent workpiece of the substrate stack having a black matrix layer. Forming the defect includes directing a portion of a pulsed laser beam into the transparent workpiece. The pulsed laser beam includes a wavelength λ, a spot size wo, and a Rayleigh range ZR that is greater than F D ⁢ π ⁢ ⁢ w 0 , 2 λ , where FD is a dimensionless divergence factor comprising a value of 10 or greater. The pulsed laser beam directed into the transparent workpiece of the substrate stack forms a pulsed laser beam focal line disposed within the transparent workpiece, where a center of the pulsed laser beam focal line is offset from an edge of the black matrix layer by a distance that is about 20% or less of a total thickness of the substrate stack and generates an induced absorption within the transparent workpiece.

    METHODS AND APPARATUS FOR FORMING AND POLISHING GLASS, GLASS-CERAMIC AND CERAMIC PREFORMS TO FORM SHAPED PLATES FOR LIQUID LENSES

    公开(公告)号:US20210206693A1

    公开(公告)日:2021-07-08

    申请号:US17056590

    申请日:2019-05-20

    Abstract: A liquid lens that includes: a lens body comprising a first window, a second window, and a cavity disposed between the first window and the second window; and a first liquid and a second liquid within the cavity of the lens body, the first liquid and the second liquid substantially immiscible with each other and having different refractive indices such that an interface between the first liquid and second liquid to form a lens. The sidewall of the cavity has an average surface roughness (Ra) of less than or equal to 200 nanometers (nm). The cavity is disposed within a plate. Further, each of the windows and the plate comprises a glass, glass-ceramic or ceramic composition. In addition, a linearity of a first bottom portion of the sidewall in proximity to the base of the plate can be from 0 μm±5 μm.

    Optical assembly having microlouvers

    公开(公告)号:US10429553B2

    公开(公告)日:2019-10-01

    申请号:US15552417

    申请日:2016-02-24

    Abstract: An optical assembly includes a transparent substrate having a first major surface and a second major surface. The transparent substrate includes one or more damage layers disposed between a first non-damage layer and a second non-damage layer. Elongated laser-induced damage tracks are disposed within the damaged layer(s) to form at least one area pattern so that light directed toward the transparent substrate at an angle that exceeds a predetermined viewing angle (θ) is scattered by the plurality of laser-induced damage tracks. Alternatively, if light is directed toward the transparent substrate at an angle that is less than the predetermined viewing angle (θ), it is transmitted by the transparent substrate.

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