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Reynard’s recently introduced custom photolithography service makes patterned optics.

Reynard’s contact exposing technique utilises a variety of thin film coating materials to achieve geometries as small as five microns.

Metallic or dielectric materials are selected based on the application’s transparent, reflective and/or conductive opto-electrical requirements.

Patterns can be applied to most substrate materials, including plastic sheeting.

Patterned optics are utilised in diverse markets and in numerous applications such as: elimination of electro-magnetic interference (EMI) for sensitive electro-optical systems; heated windows to reduce or eliminate fogging in multi-atmospheric systems; and wideband beam-splitters that operate from UV to far IR.

In elimination of electro-magnetic interference (EMI) for sensitive electro-optical systems, the coating material is a conductive metal.

The size and spacing are designed for maximum protection at a specified frequency band and provide high transmission in the visible range.

This approach is used to manufacture high-performance aircraft windows.

Heated windows that reduce or eliminate fogging in multi-atmospheric systems use conductive patterns as heating grids that are connected to bus bars on two sides of the substrate surface.

These windows will heat up when exposed to low voltage high-current sources.

This design approach is utilised in high altitude anti-tank missile windows, as well as in the tip of endoscopes for the medical market.

In wideband beam-splitters that operate from UV to far IR, an evenly distributed pattern is made of many small transmission holes or blocking dots to split the energy of the radiating source.

An even split of energy is achieved when the density of the transmitted region matches the density of the blocked region.

The split in energy can be changed by changing the ratio of the transmission region to the density of the blocking region.

Other applications for patterned optics include: encoder disks, LCD displays, bar codes, reticles, transducers and precision reference targets.

Substrates to 18in diameter can be accommodated.

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