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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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