Abstract: An as-grown single crystal ingot of a dopant-containing metal oxide or quasi-binary compound is provided in which a lateral surface has a length L greater than or equal to 50 mm, there is a linear recess on the lateral surface, and, in the area surrounded by the lateral surface, the outer shape of the cross-section perpendicular to the length direction and positioned spaced 50 mm away in the length direction from the other end in the length direction without with the recess is such that, outside of the area formed by the line of intersection between the cross-section and a faceted surface, the maximum value of the distance X of the recess from an ideal outer shape is less than or equal to 5 mm.

Abstract: A laser-light shield including a metallic substrate having uneven surface and a flame-sprayed film formed on the uneven surface and essentially consisting of metal oxide. The shield is useful for shielding a human body from laser light.