| 摘要 |
<p>The rotator (400) has an optical unit (401) including a rectilinear polarizer (105) and a quarter-wave plate (110) aligned in fixed fashion relative to one another, where a polarization direction of the polarizer is a bisector of neutral axes of the quarter-wave plate. Another optical unit (402) includes a variable-delay plate formed by a nematic liquid-crystal plate (120), and another quarter-wave plate (130) aligned in fixed fashion relative to one another, where neutral axes of the latter quarter-wave plate are bisectors of neutral axes of the nematic liquid-crystal plate.</p> |
