Specimen analysis system obtaining characteristic of specimen by diffusion approximation

A specimen analysis system comprising:

• a light injection unit which injects pulsed light into a specimen at an injection position on the specimen;
• an information acquisition unit which acquires first information carried by first light exiting from each of one or more positions in a first region of said specimen in response to injection of a first number of pulses of said pulsed light into the specimen, and second information carried by second light exiting from each of one or more positions in a second region of the specimen in response to injection of a second number of pulses of said pulsed light into the specimen, where the first number is smaller than the second number, the first region is located within a predetermined distance from said injection position, and the second region is located farther from the injection position than the first region;
• and
• an information processing unit which calculates a characteristic of said specimen on the basis of said first information and said second information.

A specimen analysis system comprising:

• a light injection unit which injects incident light into a specimen at an injection position on the specimen;
• an information acquisition unit which acquires first information carried by first light exiting from each of one or more positions in a first region of said specimen in response to injection of said incident light into the specimen for a first duration of measurement, and second information carried by second light exiting from each of one or more positions in a second region of the specimen in response to injection of said incident light into the specimen for a second duration of measurement longer than the first duration of measurement, where the first region is located within a predetermined distance from said injection position, and the second region is located farther from the injection position than the first region
• wherein the information acquisition unit comprises:
• a first photodetector positioned at each of the one or more positions in the first region of the specimen, which calculates amplitudes and phase delays of scattered light and outputs signals for the first duration of measurement, and
• a second photodetector positioned at each of the one or more positions in the second region of the specimen, which calculates amplitudes and phase delays of scattered light and outputs signals for the second duration of measurement;
• and
• an information processing unit which calculates a characteristic of said specimen on the basis of said first information and said second information.