PROBLEM TO BE SOLVED: To accurately measure information on a measurement target by removing unnecessary components such as a body motion.SOLUTION: A measuring instrument comprises: light emission means (201) for irradiating a measurement target (500) with light first light reception means (211) and second light reception means (212) for receiving return light from the measurement target (500) irradiated with the light and calculation means (320) for calculating information relating to the measurement target on the basis of the difference between sum signal of light received by the first light reception means and that received by the second light reception means and the difference signal between both of the lights. A measuring instrument like this is capable of accurately measuring information on the measurement target by removing unnecessary components such as a body motion.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】体動等の不要な成分を除去して、正確に被計測対象の情報を計測する【解決手段】計測器は、光を照射する発光手段(201)と、照射された光の被計測対象(500)からの戻り光を受光する第1受光手段(211)及び第2受光手段(212)と、第1受光手段で受光した光と第2受光手段で受光した光との和信号及び差信号の差分に基づいて、被計測対象に関する情報を算出する算出手段(320)とを備える。このような計測器によれば、体動等の不要な成分を除去して、正確に被計測対象の情報を計測することが可能となる。【選択図】図1
