Patent ID: 9506806
Filing Date: 2016-11-29
CPC Classification: G01J,G02B

Claim Text:
1. An polarization information acquisition unit configured to acquire polarization information of incident light, the polarization information acquisition unit comprising: a phase adjuster configured to adjust phases of two linearly polarized components of the incident light, which oscillate in directions orthogonal to each other; a detector configured to transmit a polarized component oscillating in one direction and not to transmit a polarized component oscillating in a direction orthogonal to the one direction, the polarized components being included in light emitted from the phase adjuster; and a photoelectric convertor configured to photoelectrically convert a polarized component transmitted through the detector, wherein the phase adjuster has at least three areas, and wherein the at least three areas include at least two areas having phase adjusting amounts different from each other, and at least two areas having an identical phase adjusting amounts and having slow axes whose directions are different from each other by 20 to 90 degrees inclusive.