Patent ID: 9395511
Filing Date: 2016-07-19
CPC Classification: G02B,H02K

Claim Text:
1. A device for focusing a laser comprising: a housing; a voice coil having a longitudinal axis mounted in the housing; a linear voltage displacement transducer (“LVDT”) mounted in the housing and having a longitudinal axis, the LVDT mounted adjacent to the voice with the axis of the LVDT in axial alignment with the longitudinal axis of the voice coil; an armature assembly centrally disposed in the housing and extending through the voice coil and LVDT, the armature assembly adapted for axial movement in response to energizing the voice coil, and the LVDT providing accurate positioning means for determining the location of the armature assembly; a lens mounted at one end of an armature assembly; a hollow bore extending through the armature from one end of the armature to the other; whereby when a light beam passes through the hollow bore it can be focused by movement of the lens controlled by the voice coil and LVDT.