Optical Analysis Method and Optical Analysis System

An optical analysis system configured to irradiate a sample containing a turbid substance in a cell with light and perform an optical analysis on the sample by using transmitted light of the light, the optical analysis system comprising:

• a cell into which the sample is to be charged;
• an ultrasonic wave irradiation device configured to irradiate the sample with ultrasonic waves of a predetermined frequency in order to excite the sample;
• an optical measurement device including a light source configured to irradiate the sample with light and alight receiver configured to measure an intensity of the transmitted light caused by the light from the light source being transmitted through the sample;
• and
• a control device configured to control the ultrasonic wave irradiation device and the optical measurement device based on the intensity of the transmitted light measured by the light receiver, wherein
• the control device is configured to set a frequency of the ultrasonic waves to be irradiated by the ultrasonic wave irradiation device, determine whether or not the frequency of the irradiated ultrasonic waves is a frequency that maximizes the intensity of the transmitted light, and instruct the optical measurement device to perform optical analysis based on this determination.