PRECISION LINEAR ACTUATOR

Abstract

A precision linear actuator (10, 120, 140) is provided particularly adapted for accurately controlling the positioning of a lens element in the optical system of a guided vehicle such as a missile. The actuator includes a frame (12, 130, 142) rigidly affixed to the missile structure which includes a pair of bearing supports (30, 32) and a pair of separated guide pockets (24, 26). A lever (14, 122, 150) is installed within the frame (12, 130, 142) and is fixed to the frame by bearings (44, 46) which enable the lever to undergo slight rotation with respect to the frame. An actuator mechanism in the form of a voice coil (56), drive motor or other device is employed to drive the lever (14, 122, 150) to undergo its rotational motion. A lens holder (16) is installed within an open area inside the lever (14, 122, 150) and defines separated guide rails (76, 78, 80, 82) which enable it to be moved linearly with respect to the frame (12, 130, 142). The lens holder (16) is coupled to the lever (14, 122, 150) through a cantilever spring (92, 94) arrangement. This coupling system transmits the rotational motion of the lever (14, 122, 150) to purely linear motion of the lens holder (16).

Source: Google Patents

35 USC §181 Secrecy Order

Inventor

• 1HAROLD E. ANDREWS

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