Patent ID: 9709897
Date: 2017-07-18
CPC Classifications: G03F

Claim:
1. A photolithography system comprising: an optical system comprising: an actuation apparatus coupled to the optical element, the actuation apparatus comprising a rotation mechanism to which the optical element is fixed, wherein the rotation mechanism is configured to adjust an angle of the optical element relative to an optical axis of the pulsed light beam based on a control signal to thereby adjust a polarization of the pulsed light beam; and a control module connected to the photolithography exposure apparatus, the optical system, and the actuation apparatus, the control module configured to: wherein the rotation mechanism either adjusts an angle of the optical element about a perpendicular element axis that is perpendicular to a first direction of polarization of the pulsed light beam or adjusts an angle of the optical element about a parallel element axis that is parallel with the first direction of polarization of the pulsed light beam.