A polarizer is an important optical component that is widely used in optics to produce a state of linear polarization. UPT provides polarizers with four materials, a -BBO, Calcite ,YVO 4 and Quartz , making them suitable for the widest spectrum and high polarization purity application.
Comparison of the four materials property as below:
|
|
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
|
No Hygroscopic
|
Low to moisture
|
High
|
No Hygroscopic
|
