Patent ID: 11906738
Assignee: GOOGLE LLC
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 8:
9. A method comprising:
emitting, from a laser light source, laser light having a first linear polarization towards an angle expander;
transmitting the laser light having the first linear polarization through the angle expander disposed between the laser light source and a scanning mirror, the angle expander comprising a polarization beam splitter (PBS) and a quarter-wave plate (QWP), wherein the QWP is disposed between the PBS and scanning mirror;
reflecting for a first time, at the scanning mirror, laser light transmitted from the angle expander;
reflecting, at the PBS, the laser light reflected from the scanning mirror;
reflecting for a second time from the scanning mirror, the laser light reflected from the PBS; and
transmitting, through the PBS, the laser light reflected from the scanning mirror.