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        • 格蘭偏振棱鏡概述
         
        格蘭偏振棱鏡概述

         

        Polarizer
        Material Illustration Properties and Application
        Glan-Taylor
        Polarizer
        a-BBO(190-3500nm)
        Calcite(350-2300nm)
        YVO4(500-4000nm)
        • Air-spaced
        • Close to Brewster's Angle Cutting
        • Low L/A=0.8
        • For medium power application
        Glan-Laser
        Polarizer
        a-BBO(190-3500nm)
        Calcite(350-2300nm)
        YVO4(500-4000nm)
         
        • Air-spaced.
        • Close to Brewster's angle Cutting
        • Mounted with escape window
        • Suitable for high power applications
        • L/A=1.5
        Glan-Thompson
        Polarizer
        a-BBO(220-900nm)
        Calcite(350-2300nm)
         
        • Cemented
        • Suitable for low power applications
        • Wide acceptance angle
        Wollaston
        Polarizer
        a-BBO(200-3500nm)
        Calcite(350-2300nm)
        YVO4(500-4000nm)
        Quartz(200-2300nm)
         
        • Cemented
        • Separate ordinary and extraordinary beams at certain angle
        • Suitable for low power application and where the large deviation is required
        Rochon
        Polarizer
        a-BBO(200-3500nm)
        YVO4(500-4000nm)
        Quartz(200-2300nm)
         
        • a-BBO is used to guarantee a wide transmission range
        • Especially suitable for UV application
        • Split the ordinary and extraordinary ray, but only ordinary beam is deviated
        High Transmission Glan Laser Polarizers
        YVO4(500-4000nm)
        Calcite(350-2300nm)

        • Air Spaced
        • Brewster's Angle Cutting
        • Mounted with escape window
        • Suitable for high power and high transmission application
        • Brewster Angle input
        Glan Thompson Polarizing Beamsplitter Cubes        Calcite
        (350-2300nm)

        • Cemented
        • Suitable for low power application
        • Wide acceptance angle field
        • Split o-ray&e-ray at 45deg
        • Only o-ray is deviated

        Comparison of the four materials

          YVO4 Calcite a-BBO Quartz
        Transparency 500-4000nm 350-2200nm 200-3500nm 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

         

        Note: Kinds of sizes are available upon request.


           PDF to download

         
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