Patent ID: 8743375

Claim:
A parallelism measuring system, comprising: a measured module comprising a measured unit and an assisting unit, wherein a lower surface of the measured unit is a measured flat surface, an upper surface of the measured unit is attached to the assisting unit, and the assisting unit is used to adjust an inclination angle of the measured unit and to allow the measured unit to move upwards and downwards; a reference unit, wherein an upper surface of the reference unit is a flat reference surface used as a reference plane for parallelism measurement; and an optical measuring unit, wherein the optical measuring unit is used to measure parallelism of the measured surface and the reference surface, and comprises: an optical measuring module, comprising: a light source unit, emitting a collimated beam to the measured surface; a reflecting unit, receiving the collimated beam reflected from the measured surface and reflecting again the collimated beam to the reference surface; and a sensing unit, receiving the collimated beam reflected from the reference surface and sensing the location of the collimated beam, thereby calculating an interval distance between the measured surface and the reference surface; and a shift module used for moving the optical measuring module, allowing the light source unit, the reflecting unit and the sensing unit to have stable inclination angle and maintaining the relative distance between the light source unit, the reflecting unit and the sensing unit, and comprising: a supporting unit used to support the optical measuring module; and a shift unit used to allow the supporting unit disposed on the shift unit to move along an extending direction of the shift unit, wherein the light source unit is a laser, the sensing unit is a location aware device, the shift unit comprises a sliding rail structure and a servomotor, the sliding rail structure allows the supporting unit installed on the sliding rail structure to move along the sliding rail structure, and the servomotor to control the moving direction, speed and distance of the supporting unit installed on the sliding rail structure.