Good quality Lenses - THIN FILM POLARIZER – WISOPTIC
Good quality Lenses - 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 |
Product detail pictures:
Related Product Guide:
We insist on offering premium quality manufacturing with superior business concept, honest product sales as well as finest and fast assistance. it will bring you not only the good quality product or service and huge profit, but the most significant is to occupy the endless market for Good quality Lenses - THIN FILM POLARIZER – WISOPTIC, The product will supply to all over the world, such as: Munich, Malta, Kuwait, We adopted technique and quality system management, based on "customer orientated, reputation first, mutual benefit, develop with joint efforts", welcome friends to communicate and cooperate from all over the world.
By Dee Lopez from Maldives - 2017.07.28 15:46
The factory workers have a good team spirit, so we received high quality products fast, in addition, the price is also appropriate, this is a very good and reliable Chinese manufacturers.
By Honey from Philippines - 2017.10.23 10:29