Imaging apparatus

An imaging apparatus that images a raw sample as an imaging object carried together with liquid in a sample container with a bottom surface having optical transparency, the apparatus comprising:

• a holder that holds the sample container;
• an imaging optical system, arranged to face the sample container held by the holder, that has an object-side hypercentric property;
• an imaging element that images an image of the imaging object focused by the imaging optical system;
• and
• an illuminator that illuminates the imaging object from a side opposite to the imaging optical system across the sample container held by the holder, wherein:
• the illuminator includes a light source and an illumination optical system that causes light emitted from the light source to be incident on a sample surface where the imaging object is present;
• the illumination optical system has an optical axis coaxial with that of the imaging optical system and an exit pupil position located between the illumination optical system and the imaging optical system;
• and
• the holder arranges the sample surface between the exit pupil position and the imaging optical system.