Abstract: (Problem to be solved) A laser refining apparatus and the laser refining method for efficiently collecting evaporant other than oxygen from an oxidized compound. (Means for solving the problem) The laser refining apparatus comprises a stage inside a processing chamber where an oxidized compound is placed; an irradiation means for irradiating a laser under the condition that the oxidized compound placed on the stage is heated to a temperature at or above the boiling point of said oxidized compound; an attaching medium to which non-oxygen evaporant evaporated by the laser irradiated by the irradiation means attaches; and a feeding means for feeding gas that prevents the non-oxygen evaporant from becoming an oxidized compound into the processing chamber. The attaching medium is positioned so that the non-oxygen evaporant can attach to the attaching medium before becoming an oxidized compound, and the oxidized compound is metal oxide or silicon oxide.

Abstract: It aims to provide a solar heat collecting apparatus that can efficiently collect energy from solar light. The solar heat collecting apparatus comprises an opened container part 22 that accumulates heat, a closed part 25 that closes the container part 22 and has an opening part 26 to let the collected solar light in, and a light absorbing part 36 that absorbs the solar light dispersed by passing through the opening part 26 so that it is converted into heat.

Abstract: A laser oscillator for improving efficiency of conversion from solar rays to laser beams is provided. The laser oscillator includes: a laser medium 31 excited by solar rays S to output laser beams; an output mirror 35 having a concave surface 35a opposed to an output end of the laser medium 31; and a light guide 20 having a reflector 22 extending from the output end of the laser medium 31 towards the outside of the laser medium 31 and reflecting the solar rays Sf to guide them to the laser medium 31.