Optical absorption measurement apparatus for absorption spectroscopy measurement and absorption spectroscopy measurement system using the same

摘要

The integrated transmission / reception fiber probe (1) and its probe tip to realize an optical absorption measurement device for absorption spectroscopy measurement that can monitor the state of a substance in a minute space at high speed with high accuracy based on laser absorption spectroscopy. A light emitting and receiving mechanism (2) which receives light from (1x) and receives a plurality of reflected lights of different phases coming back through the material to be measured and converting them into electrical detection signals (Sa) to (Sf) And a lock-in amplifier (3) for extracting a signal corresponding to light absorption of a specific wavelength by using these detection signals (Sa) to (Sf) as extraction target signals, and a post-stage of the lock-in amplifier (3) A light absorption measurement device (B) for absorption spectroscopy measurement is configured by the synthesis unit (4) that combines the extracted signals (Sa) to (Sf).