pbs

PBS（polarization beam splitter）偏振分光稜鏡，能把入射的非偏振光分徠成兩束垂直的線偏光。其中P偏光完全通過，而S偏光以45度角被反射，出射方向與P光成90度角。此偏振分光稜鏡由一對高精度直角稜鏡膠合而成，其中一個稜鏡的斜邊上鍍有偏振分光介質膜。

Material	BK7, SF glass
Dimension Tolerance	±0.2mm
Extinction Ratio	>100:1 for broadband, >500:1 for narrow band
Surface Quality	60/40 scratch and dig
Clear Aperture	>90%
Beam Deviation	<3 arc minutes
Flatness	λ/[email protected] per 25mm
Principal Transmittance	Narrow: Tp>95% and Ts<1% Broad: Tp>90% and Ts<1%
Principal Reflectance	Narrow: Rs>99% and Rp<5% Broad: Rs>99% and Rp<10%
Coating	Polarization beamsplitter coating on hypotenuse face AR coating on all input and output faces
Damage Threshold	>500mJ/cm, 20ns, 20Hz, @1064nm