Optical comb measuring apparatus

An optical comb measuring apparatus that measures an irradiation target having multiple types of measuring targets, comprising:

• an interference signal acquiring section arranged to acquire an interference signal between a post-irradiation signal comb obtained by irradiating the irradiation target with a pre-irradiation signal comb and a local comb set to be different from a repetition frequency of the pre-irradiation signal comb by a predetermined differential frequency;
• and
• a frequency spectrum measuring section arranged to measure a frequency spectrum of a result of acquisition by the interference signal acquiring section, wherein
• the pre-irradiation signal comb, the post-irradiation signal comb, and the local comb are optical combs,
• a power of light with which the irradiation target is irradiated varies at predetermined frequencies corresponding to the respective measuring targets,
• a plurality of measurable bands, each of which is a frequency range of the post-irradiation signal comb in which a single frequency of the post-irradiation signal comb corresponds to a frequency of the interference signal, each include one or more of the predetermined frequencies,
• either one or both of the post-irradiation signal comb and the local comb provided to the interference signal acquiring section have only components within a plurality of required bands including all of the predetermined frequencies, and
• frequency bands of the interference signal corresponding to the plurality of respective required bands have no areas overlapping each other.