Patent ID: 8710440

Claim:
A measuring device that uses a pulsed electromagnetic wave, comprising: a substance detecting plate including a semiconductor and an insulator formed on the semiconductor; a means configured to radiate a pulsed laser beam onto the substance detecting plate from a side of the semiconductor to generate a pulsed electromagnetic wave with an amplitude intensity depending on an amount of a detection object substance at an irradiated position; and a detecting means configured to detect the amplitude intensity of the pulsed electromagnetic wave, wherein the measuring device is configured to measure a change in a state of a solution containing the detection object substance from the amplitude intensity, the measuring device further comprising: a first beam splitter configured to split the pulsed laser beam into two beams; a detected region that is disposed on the insulator and into which a solution containing a detection object substance is able to be introduced; and a reference region that is disposed in a vicinity of the detected region on the insulator and into which a reference solution is able to be introduced, and wherein the pulsed laser beam is split into two split pulsed laser beams by the first beam splitter; one split pulsed laser beam of the two split pulsed laser beams is radiated onto the semiconductor corresponding to the detected region; the other split pulsed laser beam is radiated onto the semiconductor corresponding to the reference region; pulsed electromagnetic waves generated from the semiconductor corresponding to the detected region and the reference region are focused by a focusing means to be detected by the detecting means that is provided in singular.