Apparatus for acquiring information from object to be measured and aquiring method therefor

A method of acquiring information on an object to be measured by irradiating the object with an electromagnetic wave pulse, the method comprising:

• generating the electromagnetic wave pulse with a generating unit and irradiating the object with the electromagnetic wave pulse;
• detecting the electromagnetic wave pulse from the object with a detecting unit;
• enclosing a propagation path of the electromagnetic wave pulse leading from the generating unit to the detecting unit in a casing having a measuring window interposed between the propagation path and the object, such that the electromagnetic wave pulse transmits through the measuring window in traveling from the generating unit to the object and from the object to the detecting unit;
• changing a distance of the propagation path by moving the measuring window contacted from outside of the casing by the object, in a state in which fluctuation of ambient atmosphere in the case is suppressed by the measuring window;
• acquiring a reference waveform of the electromagnetic wave pulse from the measuring window irradiated with the electromagnetic wave pulse;
• acquiring a measurement waveform of the electromagnetic wave pulse from the object irradiated with the electromagnetic wave pulse;
• acquiring information on a physical property of a substance used for structuring a reconstructed waveform from a physical property database;
• acquiring a change in a secondary propagation distance in the electromagnetic wave pulse from information on a relative position between a focal position of the electromagnetic wave pulse and the measuring window;
• and
• structuring and optimizing the reconstructed waveform by using the reference waveform, the change in the secondary propagation distance, and the information on the physical property, by comparing with the measurement waveform.

A non-transitory computer-readable storage medium storing thereon a program configured to cause a computer to control an apparatus configured to acquire information on an object to be measured by irradiating the object with an electromagnetic wave pulse, the apparatus including a generating unit to generate the electromagnetic wave pulse with which the object is irradiated, a detecting unit to detect the electromagnetic wave pulse from the object, and a casing including a propagation path of the electromagnetic wave pulse leading from the generating unit to the detecting unit and a measuring window interposed between the propagation path and the object, the program including executable-instructions to execute steps comprising:

• changing a distance of the propagation path by moving the measuring window contacted from outside of the casing by the object, in a state in which fluctuation of ambient atmosphere in the case is suppressed by the measuring window;
• acquiring a reference waveform of the electromagnetic wave pulse from the measuring window irradiated with the electromagnetic wave pulse;
• acquiring a measurement waveform of the electromagnetic wave pulse from the object irradiated with the electromagnetic wave pulse;
• acquiring information on a physical property of a substance used for structuring a reconstructed waveform from a physical property database;
• acquiring a change in a secondary propagation distance in the electromagnetic wave pulse from information on a relative position between a focal position of the electromagnetic wave pulse and the measuring window;
• and
• structuring and optimizing the reconstructed waveform by using the reference waveform, the change in the secondary propagation distance, and the information on the physical property, by comparing with the measurement waveform.