Holographic Wire Grid Polarizers | Optometrics | Dynasil

Optometrics

Holographic Wire Grid Polarizers

We manufacture holographic wire grid polarizers on ZnSe, CaF2, BaF2, KRS-5 and Ge, covering a wavelength region from 2.5 to 30 microns.

Features

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
High extinction ratios
360° bench mountable, rotary stage for FTIR spectrometers

Anti-reflective Coatings

Zinc Selenide’s transmission can be enhanced over a selected wavelength range, typically 9 to 11 microns, by an anti-reflective (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.

Learn more about polarizers here.

Product SKUs

Holographic Wire Grid Polarizer Specifications | WP-H-K-29U

Substrate	KRS-5	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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 15µ	300:1	Surface Flatness	Does not apply to KRS-5
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

Holographic Wire Grid Polarizer Specifications | WP-H-K-25-35M

Substrate	KRS-5	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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 15µ	300:1	Surface Flatness	Does not apply to KRS-5
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

Holographic Wire Grid Polarizer Specifications | WP-H-K-34-38U

Substrate	KRS-5	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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 15µ	300:1	Surface Flatness	Does not apply to KRS-5
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

Holographic Wire Grid Polarizer Specifications | WP-H-K-34-50M

Substrate	KRS-5	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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 15µ	300:1	Surface Flatness	Does not apply to KRS-5
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

Holographic Wire Grid Polarizer Specifications | WP-H-Z-18-25M

Substrate	ZnSe	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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 10µ	300:1	Surface Flatness	λ/20 @ 10.6μ
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

Holographic Wire Grid Polarizer Specifications | WP-H-Z-22.5-25U

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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 10µ	300:1	Surface Flatness	λ/20 @ 10.6μ
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

Holographic Wire Grid Polarizer Specifications | WP-H-Z-25-29U

Substrate	ZnSe	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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 10µ	300:1	Surface Flatness	λ/20 @ 10.6μ
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

Holographic Wire Grid Polarizer Specifications | WP-H-Z-25-35M

Substrate	ZnSe	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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 10µ	300:1	Surface Flatness	λ/20 @ 10.6μ
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

Holographic Wire Grid Polarizer Specifications | WP-H-Z-34-38U

Substrate	ZnSe	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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 10µ	300:1	Surface Flatness	λ/10 @ 10.6μ
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

Holographic Wire Grid Polarizer Specifications | WP-H-Z-34-50M

Substrate	ZnSe	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	Extinction ratio @ 3µ	150:1
Extinction ratio @ 10µ	300:1	Surface Flatness	λ/10 @ 10.6μ
Parallelism	≤ 3 arc minutes	Wire Grid Spacing	2700 grooves/mm

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