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Reynard produces high-performance metallised windows by depositing a pre-determined pattern of metal on the surface of the optic utilising a thin-film coating process.

Typical metals include gold (Au), copper (Cu) and nickel (Ni) as they provide good conduction and low corrosion characteristics.

Other metals can also be used upon request.

The metal pattern applied can be configured for various requirements.

Continuous ring provides a surface for hermetically sealing the optic to a metal surface.

Bus bars allow for a conduction path between two or more sections of the optic.

Solder pads are landing pads for wire bonding or multiple segregated connections.

Grids/conductive planes are for heated windows or EMI protection.

The metallised pattern is typically combined with a thin-film filter or anti-reflection (AR) coating.

For example, a high-transmission window is created by enhancing the substrate with an AR coating on both surfaces.

A continuous ring is then added to the outside edge, allowing the window to be hermetically sealed to a metal surface.

This configuration can then be used to protect a detector from atmospheric or environmental conditions, such as use in a cryogenic Dewar application.

‘Sealed metallised windows eliminate contamination and provide an environmental barrier for the detector in cryogenic applications, which will ultimately extend the life of the sensor system,’ said Forrest Reynard, president of Reynard.

Metallised windows are produced completely within the Reynard manufacturing facility from printed specifications.

All ultraviolet, visible and infrared materials can be used as a base substrate for the window to meet customer system requirements.

Applications include cryogenic Dewar windows, hermetically sealed detectors, medical endoscopes, heated windows and other special configurations.

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