Factory wholesale Cylindrical Mirror - THIN FILM POLARIZER – WISOPTIC
Factory wholesale Cylindrical Mirror - 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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abide by the contract", conforms to the market requirement, joins during the market competition by its superior quality also as provides extra comprehensive and exceptional service for consumers to let them turn into significant winner. The pursue of the business, is definitely the clients' gratification for Factory wholesale Cylindrical Mirror - THIN FILM POLARIZER – WISOPTIC, The product will supply to all over the world, such as: Malaysia, Qatar, Czech, Our tenet is "integrity first, quality best". We have confidence in providing you with excellent service and ideal products. We sincerely hope we can establish win-win business cooperation with you in the future!
By Donna from Lisbon - 2018.11.06 10:04
The customer service staff's attitude is very sincere and the reply is timely and very detailed, this is very helpful for our deal,thank you.
By Quintina from Romania - 2018.06.28 19:27
