Patent ID: 8394301

Claim:
A method of producing an area of light transmissivity in a portion of a panel, comprising: applying a laser spot of a laser to the panel of an essentially nonlight-transmissive material being homogeneous from a first surface of the panel to an opposite second surface of the panel; sequentially laser drilling a pattern of substantially conically-shaped through holes in the panel passing from the first surface of the panel having larger diameter hole openings to the second surface of the panel having smaller diameter hole openings with a diameter smaller than a diameter of the larger diameter hole openings, the pattern of smaller diameter hole openings being substantially invisible to the naked eye; and, thereafter, filling the holes with a curable polymeric material, the filled material extending from the first surface through the panel to the second surface, the pattern of through holes defining the area of light transmissivity through the curable polymeric material when cured.