Low angular deviation of the p-polarization state beam.

The Rochon polarizer is one of the earliest designs, which is made of two birefringent material prisms cemented together. Both ordinary and extraordinary beams propagate collinearly down the optic axis in the first prism under the ordinary refractive index. Upon entering the second prism the ordinary beam experiences the same refractive index and continues undeviated. The extraordinary beam, however, now has a lower refractive index and is refracted at the interface. The angle of refraction is further increased at the birefringent material/air exit surface. Any separation angle can be designed for specific wavelength upon the requirement. The separation angle of standard products vs wavelength is shown in the plot below.

	a -BBO, 190-3500nm		Quartz, 200-3300nm
	YVO4, 400-4000nm		MgF2, 160-1500nm

Specifications
Material:	a-BBO, Calcite, YVO4, Quartz
Wavelength Range:	a-BBO:190-3500 nm,YVO4:400-4000nm,Quartz:200-2300nm
Extinction Ratio:	Quartz:<5x10 -5 ; a-BBO, YVO4:<5x10 -6
Parallelism:	<1 arc Min
Surface Quality:	20-10
Beam Deviation:	< 3 arc minutes
Wavefornt Distortion:	λ/4@633nm
Damage Threshold:	Standard:                                    Max. Power: (CW) 1 W/cm2, (Pulsed) not applicable  Optional - optically contacted: Max. Power: (CW) 20 W/cm2, (Pulsed) 40 MW/cm2
Coating:	Single MgF2
Mount:	Black Anodized Aluminium

Standard Products