meters</dt><dd>
  <table class="params">
    <tr><td class="paramname">U</td><td>Jones matrix (must be 2x2)</td></tr>
  </table>
  </dd>
</dl>
<dl class="retval"><dt>Return values</dt><dd>
  <table class="retval">
    <tr><td class="paramname">R</td><td>rotation matrix </td></tr>
  </table>
  </dd>
</dl>

</div>
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