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Polarizer



Polarizer is used to change un-polarized beam into linear polarized beam. Innowit offer complete series of polarizers, include Glan Taylor Polarizer, Glan Laser Polarizer, Glan Thompson Polarizer, Brewster Polarizer, Wollaston Polarizer, Rochon Polarizer, Polarization Beamsplitter Plate, Polarization Beamsplitter Cube, Dichroic Sheet Polarizer and etc.
 
Comparison of the four materials
   YVO4 Calcite a-BBO Quartz
Transparency 500-4000nm 350-2300nm 220-3000nm 200-2300nm
Crystal Class (Uniaxial) Positive
no=na=nb, ne=nc
Negative
no=na=nb, ne=nc
Negative
no=na=nb, ne=nc
Positive
no=na=nb, ne=nc
Mohs Hardness 5 3 4.5 7
Thermal Expansion Coefficient aa=4.43x10-6/K
ac=11.37x10-6/K
aa=24.39x10-6/K
ac=5.68x10-6/K
aa=4x10-6/K
ac=36x10-6/K
aa=6.2x10-6/K
ac=10.7x10-6/K
Hygroscopic Susceptibility Low Low Low Low
 
Material a-BBO, Calcite, YVO4
Wavelength Range a-BBO: 220-3000nm; Calcite: 350-2300nm; YVO4: 500-4000nm
Extinction Ratio <5x10-6
Surface Quality 20/10 scratch and dig
Beam Deviation <3 arc minutes
Wavefront Distortion λ/4@632.8nm
Damage Threshold >10MW/cm2
Coating Single Layer MgF2@1064nm
Mount Black Anodized Aluminium
 

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