High quality and low cost Polarizer overview
Polarizer is an important optical component that is widely used in polarizing optics to produce the state of linear polarization.We provide following polarizers with three materials,a-BBO,Calcite and YVO4 to suit for widest spectrum and high polarization purity application Comparison of main properties of the materials listed below:
| Material: | YVO4 | Calcite | a BBO | Quart |
| Transparency | 400-5000nm | 350-2300nm | 189-3500nm | 200-2300nm |
| Crystal class(Uniaxial) | Positive n o =n a =n b ,n e =n c |
Negative n o =n a =n b ,n e =n c |
Negative n o =n a =n b ,n e =n c |
Positive n o =n a =n b ,n e =n c |
| Mohs hardness | 5 | 3 | 4.5 | 7 |
| Thermal Expansion Coefficient | a a =4.43x10 -6 /K a c =11.37x10 -6 /K |
a a =24.39x10 -6 /K a c =5.68x10 -6 /K |
a a =4x10 -6 /K a c =36x10 -6 /K |
a a =6.2x10 -6 /K a c =10.7x10 -6 /K |
| Hygroscopic susceptibility | Low | Low to moisture | Low | Low |
Comparison of of all types polarizer listed below:
| Polarizer |
Material | Illustration | Properties |
| Glan-Taylor Polarizer | a - BBO (190-3500nm) Calcite (350-2300nm) YVO 4 (500-5000nm) |
a -BBO |
Air-spaced Close to Brewster's Angle Cutting. Low L/A=0.8 Mounted without escape windows. For low to medium power |
| Glan-Laser Polarizer | a - BBO (190-3500nm) Calcite (350-2300nm) YVO 4 (500-5000nm) |
a -BBO |
Air Spaced. Close to Brewster's angle Cutting. Mounted with escape windows. Suitable for high power L/A=1.5 |
| High Transmission Glan-Laser Polarizer | Calcite (350-2300nm) YVO 4 (500-5000nm) |
Calcite |
Air Spaced wBrewster's Angle Cutting Mounted without escape windows Suitable for high power and high transmission Brewster Angle input |
| Glan-Thompson Polarizer | a - BBO (220-900nm) Calcite (350-2300nm) |
a -BBO |
Cemented. Suitable for low power online_orderings. Wide acceptance angle. |
| Glan-Thompson Polarizer Beamsplitter Cube | a - BBO (200-3500nm) Calcite (350-2300nm) YVO 4 (400-4000nm) Quartz (200-2300nm) |
a -BBO |
Cemented. Separate ordinary and extraordinary beams at certain angle. Suitable for low power and where the large deviation is required. |
| Wollaston Polarizer | a - BBO (200-3500nm) Calcite (350-2300nm) YVO 4 (400-4000nm) Quartz (200-2300nm) |
a -BBO |
Cemented. Separate ordinary and extraordinary beams at certain angle. Suitable for low power online_ordering and where the large deviation is required. |
| Rochon Polarizer | a - BBO (200-3500nm) YVO 4 (400-4000nm) Quartz (200-2300nm) |
a -BBO |
a -BBO is used to guarantee a wide transmission range. Especially, suitable for UV online_ordering. Split the ordinary and extraordinary ray, but only ordinary beam is deviated. |
