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- 格蘭偏振棱鏡概述
格蘭偏振棱鏡概述
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Polarizer
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Material | Illustration | Properties and Application |
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Glan-Taylor Polarizer |
a-BBO(190-3500nm) Calcite(350-2300nm) YVO4(500-4000nm) |
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Glan-Laser Polarizer |
a-BBO(190-3500nm) Calcite(350-2300nm) YVO4(500-4000nm) |
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Glan-Thompson Polarizer |
a-BBO(220-900nm) Calcite(350-2300nm) |
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Wollaston Polarizer |
a-BBO(200-3500nm) Calcite(350-2300nm) YVO4(500-4000nm) Quartz(200-2300nm) |
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Rochon Polarizer |
a-BBO(200-3500nm) YVO4(500-4000nm) Quartz(200-2300nm) |
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| High Transmission Glan Laser Polarizers |
YVO4(500-4000nm) Calcite(350-2300nm) |
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| Glan Thompson Polarizing Beamsplitter Cubes |
Calcite (350-2300nm) |
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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.
