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Holographic Wire Grid Polarizer, CaF2, 25 mm Dia., ring mounted
Holographic Wire Grid Polarizer Specifications | WP-H-C-18-25M
Extinction ratio @ 8µ
300:1
Substrate
CaF2
Size (mm)
25 mm dia.
Size Tolerance
±0.5 mm
Thickness
5.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
18 mm
Mount
Ring Mounted
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, CaF2, 29 mm Dia., unmounted
Holographic Wire Grid Polarizer Specifications | WP-H-C-25-29U
Extinction ratio @ 8µ
300:1
Substrate
CaF2
Size (mm)
29 mm dia.
Size Tolerance
±0.5 mm
Thickness
2.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
25 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, 35 mm Dia., ring mounted
Holographic Wire Grid Polarizer Specifications | WP-H-C-25-35M
Extinction ratio @ 8µ
300:1
Substrate
CaF2
Size (mm)
35 mm dia.
Size Tolerance
±0.5 mm
Thickness
5.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
25 mm
Mount
Ring Mounted
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, 38 mm Dia., unmounted
Holographic Wire Grid Polarizer Specifications | WP-H-C-34-38U
Extinction ratio @ 8µ
300:1
Substrate
CaF2
Size (mm)
38 mm dia.
Size Tolerance
±0.5 mm
Thickness
3.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
34 mm
Mount
Unmounted
Surface Flatness
λ/10 @ 10.6μ
Parallelism
≤ 3 arc minutes
Wire Grid Spacing
2700 grooves/mm
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Holographic Wire Grid Polarizer, CaF2, 50 mm Dia., ring mounted
Holographic Wire Grid Polarizer Specifications | WP-H-C-34-50M
Extinction ratio @ 8µ
300:1
Substrate
CaF2
Size (mm)
50 mm dia.
Size Tolerance
±0.5 mm
Thickness
6.0 mm
Thickness Tolerance
±0.5 mm
Clear Aperture
34 mm
Mount
Ring Mounted
Surface Flatness
λ/10 @ 10.6μ
Parallelism
≤ 3 arc minutes
Wire Grid Spacing
2700 grooves/mm
Optometrics
Holographic Wire Grid Polarizers with Substrate CaF2
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
