Image observation apparatus

An image observation apparatus comprising:

• a light source;
• a first optical waveguide;
• an image sensor configured to perform photoelectric conversion;
• a second optical waveguide;
• and
• a spatial light modulator configured to modulate light,
• wherein the apparatus is configured to:
• introduce an object light, which is at least part of an object illumination light emitted from the light source and projected onto an object and which is reflected by the object, through the first optical waveguide to the image sensor;
• introduce a reference light, which is emitted from the light source and passes through an optical path different from that of the object light, to the image sensor;
• record an interference fringe, which is formed by the object light and the reference light, through the image sensor as a hologram;
• form the recorded hologram on the spatial light modulator and illuminate the spatial light modulator with a hologram illumination light corresponding to the reference light to generate a reconstruction light;
• and
• cause the reconstruction light, which enters the second optical waveguide optically equivalent to the first optical waveguide and exits from the second optical waveguide, to form an object reconstructed image.