| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To detect many kinds of absorbing substances with high sensitivity by a compact device by detecting a plurality of absorbing lines while sweeping the wavelength of incident light without requiring a large-scaled multi-path cell. <P>SOLUTION: In this light absorption measuring instrument for measuring the optical absorbing characteristics of a substance to be measured by applying the beam, which is emitted from a laser beam emitting means, to the substance to be measured, a first tuning fork is arranged in the substance to be measured so as to cross the light path of the incident beam incident on the substance to be measured. Further, the light absorbing and measuring instrument includes modulation means for modulating the intensity of the incident beam by the signal in the vicinity of the resonance frequency of the first tuning fork, conversion means for converting the resonance vibration of the first tuning fork to a first electric signal, and measuring means that subject the first electric signal and the signal in the vicinity of the resonance frequency to lock-in detection to measure the optical absorbing characteristics of the substance to be measured. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
