Polariser Filter - Polarizer Display Filters

VisionTek Systems Ltd are distributors of circular, HNCP, and linear sheet polarisers for the Polaroid Corporation. With more than 60 years experience in the field, Polaroid are able to provide knowledge, expertise and facilities to meet today's requirements. Click for either Linear Polarisers or Circular Polarisers

Polarizing Filters

Linear Polarizers
Un-polarized light is a complex mixture of random wavefronts transverse to the line of travel. Linear polarizing filters selectively absorb light vibrations in certain planes. When light is passes though a linear polarizer its vibrations are confined to a single linear plane.

The linearly polarized light can then be used in application such as:

	Continuously variable density of light.

	Optical instrumentation such as microscopes.

	Studio lighting and photography.

	Photo elastic stress analysis.

	3D projection and glasses.

XP38 Linear Polarizer
This is a universal replacement material for Polaroid materials HN22, HN32, HN38, HN38s and HN42.

It is a very high efficiency polarizer for the visible spectrum 400 – 750 nm. Recommended for applications where a very high density in the crossed (extinction) position is as important as high transmittance in the open position.

Specifications
Single transmission av	38.0 (450-750nm)
Double transmission av	28.9 (450-750nm)
Crossed transmission av	0.02 (450-750nm)
Polarizing efficiency av	> 99.8 (450-750nm)
Durability	Heat 70° x 240h
	Humidity 40° x 90% RH x 240h
Standard sheet size	600 x 900 x 0.18mm
Laminated sheet size	550 x 400 x 2.0mm
	550 x 400 x 3.0mmm
Glass laminated filters	3.2mm thickness upwards and in sizes up to 600 x 900mm
	Please contact us for further details on the custom laminations in glass or plastic and the supply of precision cut filters.

Circular polarisers

Circular polarisers are highly effective at eliminating "wash out" caused by ambient light reflected from the display.

Circular polarisers modify ambient light as it passes through the filter and traps the mirror image on reflection from the surface of the display. The signal from the display is allowed to pass through the filter and appears as a bright image against a dark background.

Circular Polariser

Circular polarizers are available in plastic laminations of 0.25, 0.76, 1.83 and 3.3mm thickness. Glass laminates are also available in various thickness from 3.0mm.

Typical display types where circular polarizers are used include LED's, CRT's, electro luminescent, vacuum fluorescent and LCD.

The idea sunlight readability solution is achieved when a circular polarizer is combined with an anti-reflective or non-glare surface finish. Visiontek Systems use dry film lamination process to manufacture these custom solutions in glass and plastics.
HNCP37
Visiontek Systems can continue to offer Polaroid HNCP37 circular polarizer.

Neutral in colour the designation 37 refer to the approximate single pass light transmission at 550nm.

Specifications
Single transmission av	37.0 (450-800nm)
Double transmission av	0.01 (560nm)
Polarizing efficiency av	> 99.8 (450-800nm)
Durability	Heat 70° x 240h
	Humidity 40° x 90% RH x 240h
Standard sheet size	475 x 1270 x 0.25mm
Glass laminated filters	3.2mm thickness upwards and in sizes up to 475 x 1270mm
Surface finish options	Non-glare and anti-reflective coating on glass laminations.
	Please contact us for details on the custom laminations in glass or plastic and the supply of precision cut filters.

Polarizers can be laminated to glass or plastics to enhance the impact resistance or to add further features such as anti-reflective surface finishes or emi shielding.
Contrast Enhancement filter
EmiClare CPOL

Linear Polarizer

Circular Polarizer