8 Year Exporter Ceramic Cavity - THIN FILM POLARIZER – WISOPTIC

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8 Year Exporter Ceramic Cavity - 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 (T_p/T_s)	> 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 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	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

glt
glt-2
polarizer-3

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With a positive and progressive attitude to customer's curiosity, our organization repeatedly improves our products top quality to meet the wants of consumers and further focuses on safety, reliability, environmental necessities, and innovation of 8 Year Exporter Ceramic Cavity - THIN FILM POLARIZER – WISOPTIC, The product will supply to all over the world, such as: azerbaijan, Tajikistan, Ecuador, Furthermore, all of our items are manufactured with advanced equipment and strict QC procedures in order to ensure high quality. If you are interested in any of our goods, please don't hesitate to contact us. We will do our best to meet your needs.

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