Optical scanning device includes as follows. The cables have a first end securable within a borehole in a roof, a second end for exposure from the borehole, and a weight bearing nut secured to the second end. The bristle support is divided into several bristle support segments that are movable relative to each other. The fill includes a buffer gas and a halide component that includes a rare earth halide. The film is placed against the hair to be treated and a chemical is applied to the hair.