| CPC G02B 7/00 (2013.01) [G02B 7/023 (2013.01); G02B 7/04 (2013.01); G03B 3/00 (2013.01); G03B 13/32 (2013.01); G03B 13/34 (2013.01); G03B 17/00 (2013.01); G03B 17/12 (2013.01); G03B 2205/0046 (2013.01); G03B 2217/002 (2013.01)] | 20 Claims |

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1. An apparatus, comprising:
an interior wall with one or more inner protrusions, wherein the interior wall has a first end and a second end;
an exterior wall with one or more openings, wherein the exterior wall has a first end and a second end;
a cam configured to be rotated between the interior wall and the exterior wall to cause the one or more inner protrusions to displace the interior wall in an axial direction relative to the exterior wall, the axial direction being perpendicular to the rotation of the cam between the interior wall and the exterior wall;
an actuator arm, coupled to the cam and extending through the one or more openings of the exterior wall, configured to be rotated to cause the rotation of the cam between the interior wall and the exterior wall;
a first flexure, coupled to the first end of the interior wall and the first end of the exterior wall, configured to prevent the interior wall from rotating in response to the rotation of the cam between the interior wall and the exterior wall to stabilize the interior wall; and
a second flexure coupled to the second end of the interior wall and the second end of the exterior wall, configured to prevent the interior wall from rotating in response to the rotation of the cam between the interior wall and the exterior wall to stabilize the interior wall.
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