|
Electronic
equipment with various types of indicative performance
or viewing devices, such as digital read-outs or displays,
may require protection from radiated electrical energy
(EMI/RFI). Typical applications include EMI/RFI shielding
for electronic displays and enclosures used in medical,
avionic, telecommunication, military and industrial equipment.
These unique windows are designed to enhance clarity
in viewing while, at the same time, introduce a high
degree of shielding
to prevent equipment damage due to impinging radiated
electrical energy. Transmittance, conductivity, and
image quality can
be adjusted or tuned to fit the needs of specific applications.
Metex offers a wide range of custom-shielded optical
windows for displays requiring EMI radiation or susceptibility
shielding
to meet military, TEMPEST or NSA specifications. Our
Shielded Windows have been designed into commercial
and military equipment
to provide highly effective electromagnetic shielding
while providing exceptional optical clarity and resolution.
A Wide Rage of Substrates to Meet Any Optical Requirement
Windows can be produced in glass, plastic or combinations of both. The most
commonly used substrates in the manufacture of these windows include
Acrylic, polycarbonate, glass, and Mylar (other substrates are available for specialized
applications). Metex shielded windows can also be manufactured with
one or more layers of substrates homogeneously imbedded in a clear or colored
acrylic substrate and bonded with our optical laminating methods.
Superior Performance in Shielded Windows with Knitted Wire Mesh
Knitted wire mesh is used for many EMI/RFI shielding applications. Metex wiremesh
shielded windows:
- Perform well on all types of electronic displays.
- Are especially suited where high light transmission and high shielding are
required.
Optical windows vary in shielding effectiveness depending on their size, substrate,
laminate and gasketing. Shielding effectiveness is determined by the size
of the wire openings, electrical contact between intersecting wires and the materials
and techniques employed to terminate the wire at the frame edge.
Typical Applications
- Medical Electronic
Devices
- Cathode Ray Tubes
(CRTs)
- Military Equipment
- Transportation
Equipment
- Light Emitting Diodes
(LEDs)
- Electronic Enclosures
- Architectural
Windows
- Liquid Crystal
Displays (LCDs)
- Commercial
Electronics
- GTEM
Metex offers a range of optical quality windows in standard and custom sizes.
The optical, mechanical and thermal properties of windows must be considered
based on the intended use.
ITO Coated Shielded Windows
ITO (Indium Tin Oxide) coated windows offer a combination of high light transmission,
neutral color and low electrical resistance. They are available either
laminated or unlaminated and permit direct electrical contact to its coated surface.
- ITO coated shielded windows are ideal for electronic displays requiring
moderate shielding effectiveness with high quality optical properties.
Features
Windows are constructed using a full-lamination process that results in the wire
mesh being completely encased. This permits operation under severe environmental
conditions.
- Different wire mesh patterns and alloys allow for a selection of performance
characteristics.
- The substrate can be supplied in materials and colors.
- Windows may be mounted directly to the equipment interface via a conductive
gasket or fastener.
- Polycarbonate frame designs available.
In addition, Metex windows are fully laminated to reduce losses from reflection
and dispersion. We use abrasion and scratch resistant hard coating laminates
optically matched specifically to the application along with anti glare /antireflection
laminates to control surface reflections.
|
