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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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