Polka Dot Beamsplitters | Dynasil

Optometrics

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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Polka Dot Beam Splitter Specifications | PBS-G-2080-12D

Reflecting Transmitting Ratio	20:80	Split Ratio Tolerance	± 5%
Operating Range	400 nm – 2.0 µ	Substrate	B270 Glass
Size (mm)	12.7 mm dia.	Size Tolerance	+0.0 mm/-0.5 mm
Thickness	1.5 mm nominal	Minimum Beam Diameter	2 mm
Coating Pattern	Square coated apertures

Polka Dot Beam Splitter Specifications | PBS-G-2080-25D

Reflecting Transmitting Ratio	20:80	Split Ratio Tolerance	± 5%
Operating Range	400 nm – 2.0 µ	Substrate	B270 Glass
Size (mm)	25.4 mm dia.	Size Tolerance	+0.0 mm/-0.5 mm
Thickness	1.5 mm nominal	Minimum Beam Diameter	2 mm
Coating Pattern	Square coated apertures

Polka Dot Beam Splitter Specifications | PBS-G-2080-25S

Reflecting Transmitting Ratio	20:80	Split Ratio Tolerance	± 5%
Operating Range	400 nm – 2.0 µ	Substrate	B270 Glass
Size (mm)	25.4 mm sq.	Size Tolerance	+0.0 mm/-0.5 mm
Thickness	1.5 mm nominal	Minimum Beam Diameter	2 mm
Coating Pattern	Square coated apertures

Polka Dot Beam Splitter Specifications | PBS-G-2080-38D

Reflecting Transmitting Ratio	20:80	Split Ratio Tolerance	± 5%
Operating Range	400 nm – 2.0 µ	Substrate	B270 Glass
Size (mm)	38.0 mm dia.	Size Tolerance	+0.0 mm/-0.5 mm
Thickness	1.5 mm nominal	Minimum Beam Diameter	2 mm
Coating Pattern	Square coated apertures

Polka Dot Beam Splitter, B270, 20:80, 38 mm Sq.

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PBS-G-2080-38S

$177.00

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Polka Dot Beam Splitter, B270, 20:80, 38 mm Sq. quantity
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Polka Dot Beam Splitter Specifications | PBS-G-2080-50D

Reflecting Transmitting Ratio	20:80	Split Ratio Tolerance	± 5%
Operating Range	400 nm – 2.0 µ	Substrate	B270 Glass
Size (mm)	50.8 mm dia.	Size Tolerance	+0.0 mm/-0.5 mm
Thickness	1.5 mm nominal	Minimum Beam Diameter	2 mm
Coating Pattern	Square coated apertures

Polka Dot Beam Splitter Specifications | PBS-G-2080-50S

Reflecting Transmitting Ratio	20:80	Split Ratio Tolerance	± 5%
Operating Range	400 nm – 2.0 µ	Substrate	B270 Glass
Size (mm)	50.8 mm sq.	Size Tolerance	+0.0 mm/-0.5 mm
Thickness	1.5 mm nominal	Minimum Beam Diameter	2 mm
Coating Pattern	Square coated apertures

Polka Dot Beam Splitter Specifications | PBS-G-3070-12D

Reflecting Transmitting Ratio	30:70	Split Ratio Tolerance	± 5%
Operating Range	400 nm – 2.0 µ	Substrate	B270 Glass
Size (mm)	12.7 mm dia.	Size Tolerance	+0.0 mm/-0.5 mm
Thickness	1.5 mm nominal	Minimum Beam Diameter	2 mm
Coating Pattern	Square coated apertures

Polka Dot Beam Splitter Specifications | PBS-G-3070-25D

Reflecting Transmitting Ratio	30:70	Split Ratio Tolerance	± 5%
Operating Range	400 nm – 2.0 µ	Substrate	B270 Glass
Size (mm)	25.4 mm dia.	Size Tolerance	+0.0 mm/-0.5 mm
Thickness	1.5 mm nominal	Minimum Beam Diameter	2 mm
Coating Pattern	Square coated apertures

Polka Dot Beam Splitter Specifications | PBS-G-3070-25S

Reflecting Transmitting Ratio	30:70	Split Ratio Tolerance	± 5%
Operating Range	400 nm – 2.0 µ	Substrate	B270 Glass
Size (mm)	25.4 mm sq.	Size Tolerance	+0.0 mm/-0.5 mm
Thickness	1.5 mm nominal	Minimum Beam Diameter	2 mm
Coating Pattern	Square coated apertures

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