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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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