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Holographic Wire Grid Polarizer, BaF2, 25 mm Dia., unmounted
Holographic Wire Grid Polarizer Specifications | WP-H-B-22.5-25U
Extinction ratio @ 10µ
300:1
Substrate
BaF2
Size (mm)
25 mm dia.
Size Tolerance
±0.5 mm
Thickness
2.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
22.5 mm
Mount
Unmounted
Surface Flatness
λ/20 @ 10.6μ
Parallelism
≤ 3 arc minutes
Wire Grid Spacing
2700 grooves/mm
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Holographic Wire Grid Polarizer, CaF2, 25 mm Dia., unmounted
Holographic Wire Grid Polarizer Specifications | WP-H-C-22.5-25U
Extinction ratio @ 8µ
300:1
Substrate
CaF2
Size (mm)
25 mm dia.
Size Tolerance
±0.5 mm
Thickness
2.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
22.5 mm
Mount
Unmounted
Surface Flatness
λ/20 @ 10.6μ
Parallelism
≤ 3 arc minutes
Wire Grid Spacing
2700 grooves/mm
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Holographic Wire Grid Polarizer, GE, 25 mm Dia., unmounted
Holographic Wire Grid Polarizer Specifications | WP-H-G-22.5-25U
Extinction ratio @ 10.6µ
300:1
Substrate
GE (AR/AR)
Size (mm)
25 mm dia.
Size Tolerance
±0.5 mm
Thickness
2.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
22.5 mm
Mount
Unmounted
Surface Flatness
λ/20 @ 10.6μ
Parallelism
≤ 3 arc minutes
Wire Grid Spacing
2700 grooves/mm
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Holographic Wire Grid Polarizer, KRS-5, 25 mm Dia., unmounted
Holographic Wire Grid Polarizer Specifications | WP-H-K-22.5-25U
Extinction ratio @ 15µ
300:1
Substrate
KRS-5
Size (mm)
25 mm dia.
Size Tolerance
±0.5 mm
Thickness
2.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
22.5 mm
Mount
Unmounted
Surface Flatness
Does not apply to KRS-5
Parallelism
≤ 3 arc minutes
Wire Grid Spacing
2700 grooves/mm
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Holographic Wire Grid Polarizer, ZnSe, 25 mm Dia., unmounted
Holographic Wire Grid Polarizer Specifications | WP-H-Z-22.5-25U
Extinction ratio @ 10µ
300:1
Substrate
ZnSe
Size (mm)
25 mm dia.
Size Tolerance
±0.5 mm
Thickness
2.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
22.5 mm
Mount
Unmounted
Surface Flatness
λ/20 @ 10.6μ
Parallelism
≤ 3 arc minutes
Wire Grid Spacing
2700 grooves/mm
Optometrics
Holographic Wire Grid Polarizers with Size (mm) 25 mm dia. and Clear Aperture 22.5 mm
Holographic Wire Grid Polarizers
Optometrics manufactures holographic wire grid polarizers on CaF2 (Calcium Fluoride), ZnSe (Zinc Selenide), BaF2 (Barium Fluoride), KRS-5 and Ge (Germanium), covering a wavelength region from 2.5 to 30 microns.
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- Wavelength region: 2.5 to 30 microns
- CaF2, ZnSe, BaF2, Ge and KRS-5 (Thallium Bromide) substrates
- Finer grid pattern for better low wavelength performance
- High transmission
- Extinction ratio > 90,000:1
- Zinc Selenide’s transmission can be enhanced over a selected wavelength range, typically 9 to 11 microns, by an AR coating on the rear surface
- Calcium Fluoride and Barium Fluoride have low refractive index values and do not see significant benefit from AR coatings
- KRS-5 is not normally AR coated, because this would limit its broad transmission range, which is its primary advantage
- Germanium polarizers are AR/AR coated to maximize transmission @10.6μ
- Due to the manufacturing process ruled wire grid polarizers are not offered with AR coatings
