Interface information identification device, interface information identification method, program, internal information identification device, and optical heating device

An interface information identification method comprising steps of:

• emitting light to heat a planar sample, the sample including a first layer and a second layer overlapping the first layer;
• homogenizing an intensity distribution of the emitted light to irradiate an entire surface of the first layer of the sample with the light;
• detecting a temperature distribution on a surface of the second layer of the sample;
• and
• identifying information about an interface between the first layer and the second layer of the sample based on the detected temperature distribution.

A non-transitory computer readable storage medium storing a program for causing a computer to execute functions of:

• emitting light to heat a planar sample, the sample including a first layer and a second layer overlapping the first layer;
• homogenizing an intensity distribution of the emitted light to irradiate an entire surface of the first layer of the sample with the light;
• detecting a temperature distribution on a surface of the second layer of the sample;
• and
• identifying information about an interface between the first layer and the second layer of the sample based on the detected temperature distribution.

An internal information identification device comprising:

• a light source;
• an irradiating unit configured to homogenize an intensity distribution of light emitted from the light source toward a planar sample to irradiate an entire surface of the sample with the light;
• a detecting unit configured to detect, at an opposite side of the sample from the irradiating unit, a temperature distribution on a back side of the sample;
• and
• an identifying unit configured to identify information about an internal condition of the sample based on an amplitude and a phase lag of the temperature distribution detected by the detecting unit.