Patent ID: 9488846
Filing Date: 2016-11-08
CPC Classification: G02B,H04N

Claim Text:
1. An optical unit for providing two orthogonally polarized light beams, comprising: a condensing lens which condenses light from an object; a pupil splitting polarization separation element having a left eye polarization separation region and a right eye polarization separation region that are divided by a pupil splitting line which is orthogonal to an optical axis, wherein the left eye polarization separation region and the right eye polarization separation region output two respective linearly polarized light beams with orthogonal polarization directions; a polarizing direction conversion element comprising a half-wave plate for converting the polarization directions of the two linearly polarized light beams output from the pupil splitting polarization separation element; and a rotation driving unit which rotates the pupil splitting polarization separation element and the polarizing direction conversion element in an optical axis rotational direction with the rotation angle of the polarizing direction conversion element being half of the rotation angle of the pupil splitting polarization separation element to generate the two orthogonally polarized light beams to have different axis angles, wherein the rotation angle of the polarizing direction conversion element is the same as the angle of the crystal axis of the polarizing direction conversion element.