China wholesale Precision Optics - THIN FILM POLARIZER – WISOPTIC
China wholesale Precision Optics - THIN FILM POLARIZER – WISOPTIC Detail:
Thin film polarizers are made from composed materials which include a polarizing film, an inner protective film, a pressure-sensitive adhesive layer, and an outer protective film. Polarizer is used to change un-polarized beam into linear polarized beam. When the light passes through the polarizer, one of the orthogonal polarization components is strongly absorbed by the polarizer and the other component is weakly absorbed, thus natural light is converted into linearly polarized light.
Polarization optics is important for both intra and extra cavity use. By having high contrast thin film polarizers in their design, laser engineers can save weight and volume within their devices without influencing the output. Compared with polarizing prism, polarizer has larger incident angle and can be made with larger apertures. Compared with polarizers made from birefringent crystals, the advantage of thin film polarizers is that they can be made in very large sizes, therefore can work in a laser device with high power or energy.
WISOPTIC Specifications – Thin Film Polarizers
| Material | BK7, UVFS |
| Diameter Tolerance | +0.0/-0.15 mm |
| Thickness Tolerance | ± 0.1 mm |
| Clear Aperture | > 90% of central area |
| Surface Quality [S/D] | < 20/10 [S/D] |
| Transmitted Wavefront Distortion | λ/10 @ 632.8 nm |
| Parallelism | ≤ 30” |
| Extinction Ratio (Tp/Ts) | > 200:1 |
| Coating | High LDT coating upon request |
| Laser Damage Threshold | 10 J/cm² @ 1064 nm, 10 ns, 10 Hz |
Comparison of Different Materials of Polarizers
| YVO4 | Calcite | α-BBO | Quartz | |
| Transparency Band | 500-4000 nm | 350-2300 nm | 220-3000 nm | 200-2300 nm |
| Crystal Type (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=4.43×10-6/K ac=11.37×10-6/K |
aa=24.39×10-6/K ac=5.68×10-6/K |
aa=4×10-6/K ac=36×10-6/K |
aa=6.2×10-6/K ac=10.7×10-6/K |
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Our goods are commonly recognized and reliable by consumers and may satisfy continually developing economic and social needs for China wholesale Precision Optics - THIN FILM POLARIZER – WISOPTIC, The product will supply to all over the world, such as: Provence, Denmark, South Korea, Our company always concentrate on the development of the international market. We have a lot of customers in Russia , European countries, the USA, the Middle East countries and Africa countries. We always follow that quality is foundation while service is guarantee to meet all customers.
By Roberta from Toronto - 2018.11.02 11:11
The company can keep up with the changes in this industry market, product updates fast and the price is cheap, this is our second cooperation, it's good.
By Charlotte from Juventus - 2017.05.02 11:33
