| CPC F41G 1/18 (2013.01) [F41G 1/38 (2013.01); F41G 3/08 (2013.01)] | 17 Claims |

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1. A turret configured to adjust a position of an alignment stage coupled to the turret, the turret comprising:
an adjustment knob configured to be actuatable in a plurality of adjustment directions to adjust the position of the alignment stage;
a lock configured to prevent movement of the adjustment knob in the plurality of adjustment directions;
wherein the adjustment knob is further configured to be actuatable to transition the adjustment knob between a locked state in which the lock is engaged and an unlocked state in which the lock is released wherein, with the adjustment knob in the unlocked state, the adjustment knob is actuatable in the plurality of adjustment directions; and
a biasing member configured to exert a biasing force on the adjustment knob to bias the adjustment knob to the locked state when the adjustment knob is released from the unlocked state.
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