Patent ID: 8437058

Claim:
A hologram which forms a light intensity distribution and a polarization distribution on a predetermined plane by giving a phase distribution to a wavefront of incident light, said hologram comprising: a first anisotropic cell and second anisotropic cell configured to change a polarization state of the incident light; and a first isotropic cell and second isotropic cell configured not to change the polarization state of the incident light, wherein a direction of an optic axis of said first anisotropic cell is different from a direction of an optic axis of said second anisotropic cell, a thickness of said first isotropic cell is different from a thickness of said second isotropic cell, the thickness of said first isotropic cell is set so that a phase change of linearly polarized light in a first direction of the incident light is the same in said first isotropic cell and said first anisotropic cell, and the thickness of said second isotropic cell is set so that a phase change of linearly polarized light in a second direction perpendicular to the first direction of the incident light is the same in said second isotropic cell and said first anisotropic cell.