Patent ID: 11942751
Assignee: HAMAMATSU PHOTONICS K.K.
Field: Optics (Instruments)
Classification: CPC B  H  G | IPC B  G  H

Claim 4:
5. The laser device according to claim 1,
wherein the phase control unit includes
a polarization control element configured to change a polarization direction of the laser light such that the received laser light includes an S-polarized component and a P-polarized component and to emit the changed laser light, and
a liquid crystal type spatial phase modulator configured to control a spatial phase of one of the S-polarized component and the P-polarized component of the laser light emitted from the polarization control element, to emit the one controlled polarized component as the control light, and to emit the other of the S-polarized component and the P-polarized component of the laser light as the non-control light, and
wherein, in the correction process, the control unit adjusts a phase modulation pattern displayed on the liquid crystal type spatial phase modulator on the basis of a detection result for the non-control light to correct a control state for a spatial phase of the control light in the phase control unit.