Optical image measurement device

An optical image measurement device comprising:

• a light source configured to output a light having low temporal coherence and low spatial coherence;
• an optical system configured to split the light into a signal light and a reference light and superimpose the signal light having passed through a measured object and the reference light having passed through a reference object, thereby generating an interference light;
• a light receiver configured to receive the interference light and output an electric signal;
• and
• a forming part configured to form an image of the measured object based on the electric signal, wherein:
• the light receiver has a light receiving face on which a plurality of light receiving elements are arranged 2-dimensionally;
• and
• the optical system projects the interference light onto the light receiving face so that a size of the spatial coherent region of the interference light becomes equal to or larger than a size of the light receiving element on the light receiving face.