Abstract:
A supporting unit is provided. The supporting unit includes a body, an alignment member, at least one sensor, and a controller. The body has a top surface supporting a target object. The alignment member is disposed in the body and adjusts a position of the target object. The sensor senses the position of the target object. The controller controls the alignment member and the sensor member. The alignment member includes a magnet that adjusts the position of the target object according to an electromagnetic force; and a coil that applies the electromagnetic force to the magnet.
Abstract:
Measuring systems and methods using the same may be provided. For example, the measuring system including a first reference member located at one of a first target member and a second target member, the first and second target members being configured to make a relative movement with respect to each other and the first reference member having a first length, a second reference member located at the other of the first target member and the second target member and having a second length, and a measuring unit located at a distance from the first reference member and the second reference member, the measuring unit configured to measure a relative location of one of the first reference member and the second reference member with respect to the other may be provided.