Ruled Wire Grid Polarizer

Optometrics manufactures wire grid polarizers by ruling precisely spaced grooves directly into a highly polished CaF2 or ZnSe substrate. The ruling process forms sharp, well defined peaks which are then coated with aluminum by vacuum deposition at an oblique angle. The direct ruling and coating process results in a series of closely spaced, highly conductive wires with a high extinction ratio and an inherently high damage threshold. No intermediate absorbing materials are required between the substrate and aluminum coating, minimizing localized heating and allowing the use of the polarizers with relatively high power lasers. A wire grid polarizer can be used at angles of incidence up to 45 degrees with collimated, diverging or converging beams without loss of efficiency and little lateral displacement of the transmitted beam.

Product Selection


Specifications
Ruled Wire Grid Polarizers:
Wire Grid Spacing 1200 g/mm nominal
Parallelism ≤ 3 arc min
Surface Flatness λ/20 @ 10.6 μ up to 2.5mm C.A.
Groove Parallelism to Edge ± 0.5°
Dimensional Tolerance ± 0.5 mm
Substrate Thickness

For sizes under 30 mm..... 2mm,  For sizes ≥30mm......3mm

Ring Thickness Tolerance ± 0.1 mm
Damage Threshold:
CW Laser 100 W/cm2
Pulsed Laser (100 nsec. pulse) 2 J/cm2

CAUTION: The surface of a wire grid polarizer, like any diffraction grating, is extremely delicate. Nothing should ever be allowed to touch the surface of the polarizer. Handling, when necessary, should be by the edge only and with protected fingers. Careful removal of dust by gentle air flow is the only cleaning procedure recommended by Optometrics.
(Add $495 for AR Coating (rear surface only) on ZnSe ≤38mm dia. or $895 for 50mm dia.)
Ruled Wire Grid Polarizers
DIAMETERS - UNMOUNTED
CATALOG NO. 5-2615 5-2625 5-2638 5-2650 5-2815 5-2825 5-2838 5-2850
SUBSTRATE ZnSe ZnSe ZnSe ZnSe CaF2 CaF2 CaF2 CaF2
CLEAR
APERTURE
13.5 mm 22.5 mm 34.0 mm 45.0 mm 13.5 mm 22.5 mm 34.0 mm 45.0 mm
SUBSTRATE
DIAMETER
15 mm 25 mm 38 mm 50 mm 15 mm 25 mm 38 mm 50 mm

PRICE($) *

1,069.00 1,615.00 2,835.00 3,465.00 995.00 1,495.00 1,990.00 2,410.00

RULED WIRE GRID POLARIZERS
DIAMETERS - MOUNTED IN PROTECTIVE DOUBLE RING

CATALOG NO. 5-2626 5-2639 5-2651 5-2816 5-2826 5-2839 5-2851
SUBSTRATE ZnSe ZnSe ZnSe CaF2 CaF2 CaF2 CaF2
CLEAR
APERTURE
18 mm 34 mm 43 mm 10 mm 18 mm 34 mm 43 mm
OUTSIDE
DIAMETER
25 mm 50 mm 50 mm 25 mm 25 mm 50 mm 50 mm
RING
THICKNESS
5.0 6.0 6.0 5.0 5.0 6.0 6.0

PRICE($)*

1,730.00 2,940.00 3,570.00 1,175.00 1,585.00 2,095.00 2,515.00

RULED WIRE GRID POLARIZERS
SQUARES - UNMOUNTED
CATALOG NO. 5-2617  5-2817
SUBSTRATE ZnSe CaF2
CLEAR APERTURE 13.5 mm sq. 13.5 mm sq.
SUBSTRATE SIZE 15 mm sq. 15 mm sq.

PRICE($)*

1,055.00 975.00

* Prices are in USD and are list prices only.

Standard Sizes and Options

Ruled wire grid polarizers are available in five standard sizes (15 mm square,15, 25, 38 and 50 mm diameter). Ruled polarizers are available unmounted, mounted in a double protective ring or mounted in a bench mountable stage which allows 360° rotation.

If your application requires a different size or shape, please contact us for price and delivery. OEM inquires are welcome.

Nominal Extinction Ratios

The typical extinction ratios listed below are nominal and are often exceeded:

SUBSTRATE MATERIAL EXTINCTION RATIOS @
3.0μ 5.0μ 10.6μ
CaF2 50 80 NA
ZnSe 50 75 100

TYPICAL TRANSMISSION -
%T OF ZnSe WIRE GRID POLARIZER @ 10.6 μ
Uncoated ≥ 64%
AR, one side ≥76%
   
CALCIUM FLORIDE (CaF2)  
3.0μ 65%
5.0μ 85%
8.0μ 88%

 

Go to top