Laser oscillator including inclination measuring unit for measuring inclination amount of inside mirror

Abstract

According to the present invention, a laser oscillator includes at least two mirrors and mirror holding units for holding the at least two mirrors such that the two mirrors can be inclined with respect to an optical axis. Each of the mirror holding units includes two inclination adjustment units configured to incline corresponding mirror, a pivot point portion configured to function as a pivot point when the mirror is inclined, and one inclination measuring unit configured to measure an inclination amount of the mirror inclined by the two inclination adjustment units. The inclination measuring unit is disposed in a region other than on straight lines connecting the pivot point portion with each of the inclination adjustment units.

Dependencies are inferred from the claim text.