Electromagnetic wave measuring apparatus, method, and recording medium

An electromagnetic wave measuring method for irradiating an irradiation target having a measuring target with a pre-irradiation electromagnetic wave and, based on a post-irradiation electromagnetic wave obtained, measuring the measuring target, in which

• the post-irradiation electromagnetic wave has a response component from the measuring target and a background component corresponding to the pre-irradiation electromagnetic wave,
• the electromagnetic wave measuring method, comprising:
• acquiring a frequency spectrum of a first signal that includes the background component and the response component of the post-irradiation electromagnetic wave;
• acquiring a frequency spectrum of a second signal that includes the background component of the post-irradiation electromagnetic wave;
• and
• subtracting the frequency spectrum of the second signal from the frequency spectrum of the first signal.

A non-transitory computer-readable medium including a program of instructions for execution by a computer to perform an electromagnetic wave measuring process for irradiating an irradiation target having a measuring target with a pre-irradiation electromagnetic wave and, based on a post-irradiation electromagnetic wave obtained, measuring the measuring target, in which

• the post-irradiation electromagnetic wave has a response component from the measuring target and a background component corresponding to the pre-irradiation electromagnetic wave,
• the electromagnetic wave measuring process, comprising:
• acquiring a frequency spectrum of a first signal that includes the background component and the response component of the post-irradiation electromagnetic wave;
• acquiring a frequency spectrum of a second signal that includes the background component of the post-irradiation electromagnetic wave;
• and
• subtracting the frequency spectrum of the second signal from the frequency spectrum of the first signal.