Polka Dot Beamsplitters

Polka Dot Beamsplitters

Polka dot beamsplitters provide constant reflection to transmission ratio over the entire 250 to 2000nm range using a fused silica substrate or 400 to 2000nm wavelength range with a B270 substrate.

The “polka dot” appearance of these beam splitters comes from the combination of a photolithography process and the vacuum deposition of aluminum. The result is a precise pattern of small aluminum “dots” on the glass substrate. The beam is split by reflection from the aluminized dots and transmission through the non-aluminized portion of the substrate.

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