Infrared ray absorption survey instrument and infrared ray absorption inspection manner

摘要

When transmitting measuring object ones, when inspecting the absorption of light, first, radiation point to the pulse laser light from the laser illuminant, the pulse laser light which transmitted measuring object ones absorbing light, the light absorbent signal is obtained. Next, with the timing which crosses the threshold where signal level of the light absorbent signal which is obtained is configurated, it generates rectangular pulse, it supplies to the laser illuminant this rectangular pulse, as a Drive impulse for radiation of pulse laser light. Because of this, the cumulative time delay of timing of generation of the rectangular pulse where radiation of pulse laser light repeatedly is done, occurs with the decrease of the optical strength with the absorption of pulse laser light is sought, absorption of light is inspected making use of this cumulative time delay.