Patent ID: 11940349
Assignee: TSINGHUA UNIVERSITY
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. The plane grating calibration system of claim 1, wherein the phase modulator comprises a first acousto-optic modulator and a second acousto-optic modulator,
wherein the first acousto-optic modulator is disposed on an optical path of the light P transmitted through the first polarizing beam splitter, the transmitted light P generated by the first polarizing beam splitter is modulated by the first acousto-optic modulator and then travels to the second mirror; and
wherein the second acousto-optic modulator is disposed on an optical path of the light S reflected by the first polarizing beam splitter, the light S reflected by the first polarizing beam splitter is modulated by the second acousto-optic modulator and then travels to the third mirror.