Cell observation device and cell observation method

A cell observation method comprising:

• a reflection interference imaging step wherein a reflection interference imaging unit images light emitted from a reflection interference measurement light source and reflected from a cell, to generate a reflection interference image;
• a quantitative phase imaging step wherein a quantitative phase imaging unit images light emitted from a quantitative phase measurement light source and transmitted by the cell, to generate a quantitative phase image;
• an image alignment step wherein an image alignment unit matches a spatial position of the reflection interference image with a spatial position of the quantitative phase image, thereby to implement alignment between the two images;
• a first extraction step wherein a first extraction unit extracts a first parameter from the reflection interference image in the alignment with the quantitative phase image by the image alignment unit;
• and
• a second extraction step wherein a second extraction unit extracts a second parameter from the quantitative phase image in the alignment with the reflection interference image by the image alignment unit.