Patent ID: 9325150
Filing Date: 2016-04-26
CPC Classification: H01S,H05G

Claim Text:
1. An alignment system for use with a laser apparatus, comprising: a guide laser device configured to output a guide laser beam; an adjusting mechanism configured to adjust a travel direction of at least one of the guide laser beam and a laser beam from the laser apparatus; a beam path combiner configured to control a travel direction of the laser beam and a travel direction of the guide laser beam to substantially coincide with each other; a first optical detection unit provided downstream from the beam path combiner and configured to detect the laser beam and the guide laser beam; a first controller configured to control the adjusting mechanism based on a detection result of the first optical detection unit; a beam steering unit provided downstream from the beam path combiner and configured to control travel directions of the laser beam and the guide laser beam; a second optical detection unit provided downstream from the beam steering unit and configured to detect at least the guide laser beam; and a second controller configured to control the beam steering unit based on a detection result of the second optical detection unit, wherein the beam steering unit includes: a hollow optical pipe provided downstream from the beam path combiner and upstream from the second optical detection unit; a first optical element provided inside the hollow optical pipe and configured to control travel directions of the laser beam and the guide laser beam; a second optical element provided inside the hollow optical pipe and configured to control travel directions of the laser beam and the guide laser beam; a first actuator unit configured to adjust the position and posture of the first optical element; and a second actuator unit configured to adjust the position and posture of the second optical element.