Line-like laser beam flux irradiating apparatus

A line-like laser beam flux irradiating apparatus comprising:

• a laser beam flux source which emits a divergent laser beam flux;
• a conversion lens which converts the divergent laser beam flux to a parallel laser beam flux;
• a first lens which forms a first line-like laser beam flux;
• a second lens which forms a second line-like laser beam flux intersecting the first line-like laser beam flux;
• a reflective optical system comprised of a first reflective surface which reflects the parallel laser beam flux toward the first lens and a second reflective surface which reflects the parallel laser beam flux toward the second lens;
• a laser beam flux switching device which is disposed between the reflective optical system and the conversion lens and guides the parallel laser beam flux to the first reflective surface and the second reflective surface so as to switch a course of the parallel laser beam flux between a first laser beam flux state under which a cross-wise line-like laser beam flux is formed by the cooperation of the first line-like laser beam flux and the second line-like laser beam flux, a second laser beam flux state under which the parallel laser beam flux is guided to the first reflective surface so as to form only the first line-like laser beam flux, and a third laser beam flux state under which the parallel laser beam flux is guided to the second reflective surface so as to form only the second line-like laser beam flux,
• wherein the parallel laser beam flux is simultaneously guided to the first reflective surface and the second reflective surface so as to form a cross-wise line-like laser beam flux by the cooperation of the first line-like laser beam flux and the second line-like laser beam flux.