Digital holography device and phase plate array

A digital holography device comprising:

• a light source to emit light, the light source being provided for supply of an object light beam formed by at least one of radiation, transmission, scattering, reflection, and diffraction from a subject according to the emitted light;
• a phase-shifting element to split the light emitted from the light source into two kinds of reference light beams having different phases in a plane perpendicular to a direction in which the light emitted from the light source travels;
• image-capturing device including an image-capturing plane on which two kinds of interference fringe patterns are recorded, the interference fringe patterns being formed by interferences between the two kinds of reference light beams and the object light beam;
• and
• an image reconstruction device to generate a reconstructed image of the subject according to the two kinds of interference fringe patterns recorded on the image-capturing plane, wherein
• the light source is configured to emit linearly polarized light having first-direction polarized components and second-direction polarized components,
• the digital holography device further includes a polarization beam splitter to convert the object light beam into light beams having the first-direction polarized components, and to convert the light emitted from the light source into light beams having the second-direction polarized components, and
• the phase-shifting element includes,
• a wavelength-plate optical-medium array device to split the light beams having the second-direction polarized components into two kinds of reference light beams having different phases in a plane perpendicular to a direction in which the light beams having the second-direction polarized components travel, and
• a polarizer to transmit third-direction polarized light components of the object light beam and third-direction polarized light components of the two kinds of reference light beams.