Manually adjusted stage with nanometer digital readout

摘要

A stage assembly includes a first element and a second element. A coarse and fine adjustment mechanism is attached to the first element and engages the second element. Turning either a coarse or fine range selector produces relative movement of the second element in relation to the first element. An encoder is attached to the first element and the second element. The encoder detects movement of the second element in relation to the first element and determines the position of the second element from a home position. A display electrically connected to the encoder displays the position of the second element. A multiplier may be electrically connected to the encoder to partition a digital signal from the encoder to improve the resolution of the adjustment mechanism.