Patent ID: 8467057

Claim:
A system which comprises a dual reflection surface means selected from the group consisting of: first and second separate reflection surfaces; and a single element having first and second reflection surfaces; configured to provide an output beam in an X-Z plane, by re-directing an input beam which enters thereinto along a Y axis, in an X-Y-Z axis coordinate system; said dual reflection surface means further serving to substantially compensate any effects on beam polarization state entered by a first beam directing reflection therewithin, by effects of a second beam directing reflection therewithin, a mechanism thereof being that an effect of the first reflection on a p or s component of a polarized beam in the dual reflection surface means configuration, is canceled by a similar effect in the second reflection on an s or p component, respectively; said dual reflection surface means being characterized in that projected planes of the first and second reflection surfaces thereof simultaneously: intersect the Y and Z axes, but not the X axis, at a single point, and intersect the X and Z axes, but not the Y axis, at a single point, respectively, and in that said second reflection surface is translated from the first reflection surface along the Z axis, as said dual reflection surface means is viewed in frontal elevation, in which the dual reflection surface means is mounted to allow rotation about an axis parallel to the Y axis of the X-Y-Z axis coordinate system to alter an angle at which the output beam exits therefrom.