Patent ID: 6233268
Filing Date: 2001-05-15
Classification: H01S

Abstract:
A laser apparatus for generating laser light beams including:a laser oscillation device for oscillating laser beams;a resonation device with a plurality of reflection mirrors for reflecting the laser beams oscillated by the laser oscillation device;a rotation device for rotating at least one of the reflection mirrors about a first axis and a second axis respectively, the second axis intersecting the first axis at a predetermined angle;a light quantity measurement device for measuring a light quantity of the laser beams emitted from the resonation device;a rotation angle determination device for determining a first rotation angle at which the light quantity measurement device detects an output of the laser beam from the resonation device while the reflection mirror is rotated about the first axis and the second axis respectively, and for determining a second rotation angle and a third rotation angle which are on opposite sides of the first rotation angle;a rotating range determination device for determining a rotating range of the reflecting mirror, the range including a rotation angle at which a maximum quantity of laser beam is obtained, based on measurement values measured by the light quantity measurement device when the reflection mirror is positioned at the first, second, and third rotation angles determined by the rotation angle determination device, andan angle determination device for determining an optimum rotation angle of the reflection mirror with respect to the first axis and the second axis respectively, at which the maximum quantity of laser beam is obtained, based on the measurement values measured by the light quantity measurement device when the reflection mirror is rotated successively within the rotating range determined by the rotating range determination device.