SHIELDED WINDOWS

A shielded or RFI/EMC window allows the transmission of light through it whilst preventing the transmission of Radio Frequency Interference or RFI. Most windows of this type consist of a fine woven blackened copper or silver plated stainless steel mesh sandwiched or encapsulated within a laminated polymer, glass or cast panel. In each case the mesh surface has anti-reflective finish to improve the viewing characteristics of the window under harsh lighting conditions.

An option to this is a shielded window comprising of a clear glass or plastic substrate coated with a practically transparent, very thin layer of metal, usually a silver or ITO (indium doped tin oxide) coating. In either case the conductive coating is terminated at the edge where the window can be terminated to the enclosure either by some form of gasket or electrically conductive adhesive.

Many configurations of construction of shielded window constructions and materials exist. Border Precision welcome your request to assist you in compiling the design or specification for the your shielded window application. All operating environmental and performance characteristics will be taken into consideration to provide optimum performance all of the time. Various options on window material and construction types can be seen below.

Electrically conductive adhesives can be precisely positioned and applied to Shielded windows using servo controlled precision CNC equipment providing highest levels of positioning.

Border Precision can also provide shielded windows for extreme environments such as high-pressure windows for sub-aqua applications, or ruggadised damage resistant proof windows. Special applications include:

• Hand held or Portable meters or instruments
• Industrial control display panels
• Special purpose notebook or palmtop computers
• Panel mounted display screens

There are a number of options open for producing RFI/EMC shielded windows each having unique strong advantages - depending on design priorities.

Advantages - scratch resistance, resistance to solvents/chemicals, non-flammable
Usual construction method - fully laminated, sometimes edge bonded
Types - low coefficient of expansion borosilicate glass, toughened
Surface finishes - etched anti reflective, magnesium fluoride or multilayer antireflective

Advantages - impact resistance/toughness, low density, low or non-flammable
Usual construction method - fully laminated, edge bonded
Types - UL94-V0 flammability or low smoke emission grades, range of tints
Surface finishes - scratch/mar, solvent and chemical resistant hard surface coating, this coating can be applied as an option

Advantages - high level of optical clarity, low density
Usual construction method - fully laminated, can be cast or edge bonded
Types - wide range of optical enhancing tints
Surface finishes - scratch/marking resistant hard surface coating, and anti-reflective coating

Advantages - high level of optical clarity, low density, scratch resistance, high temperature stability, resistance to solvents / chemicals
Usual construction method - cast or cast / laminated assembly
Types - wide range of optically enhancing tints
Surface finishes - 'cast in' anti-reflective finish

Special purpose display or contrast enhancement filters can be built in to our windows. Cast windows allow filters to be cast in at the time of manufacture.

Optional Types of Construction and Terminating / Mounting ››
Types of Shielding Material Options ››