METHOD OF FORMING THROUGH HOLE IN GLASS

    公开(公告)号:US20220153632A1

    公开(公告)日:2022-05-19

    申请号:US17439541

    申请日:2020-03-20

    摘要: A method of forming a through hole in a glass substrate is provided. The method includes irradiating a surface of a glass substrate with a mid-infrared or far-infrared laser to form a pilot hole including a plurality of cracks extending radially outward from the pilot hole. The pilot hole is etched to expand a diameter of the pilot hole to at least encompass the plurality of cracks to form a through hole having a through hole entry diameter of about 200 micrometers to about 1.5 millimeters.

    APPARATUS COMPRISING A LIGHT GUIDE PLATE WITH FEATURES AND METHODS FOR USING THE SAME TO DIRECT LIGHT

    公开(公告)号:US20220057561A1

    公开(公告)日:2022-02-24

    申请号:US17421176

    申请日:2020-01-07

    IPC分类号: F21V8/00

    摘要: Apparatus can comprise a light source and a light guide plate. The light guide plate can comprise a plurality of features within an interior of the light guide plate. A feature of the plurality of features can comprise a first refractive index that is different from a refractive index of the light guide plate. A spacing between a pair of adjacent features of the plurality of features can be from about 20 micrometers to about 200 micrometers. The apparatus can be used to direct light out of the light guide plate with a peak radiance oriented from 0° to 30° from a direction normal to the first major surface of the light guide plate. Methods of making the apparatus can comprise emitting a burst of pulses from a laser. Methods can comprise focusing the burst of pulses into a line focus within the light guide plate.