Polka Dot Beamsplitters with Reflecting Transmitting Ratio 70:30

Polka Dot Beamsplitters

Optometrics’ 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 on SCHOTT B270® ultra-white glass 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.

The design angle for these polka-dot beamsplitters is 45 degrees. The reflectance will be slightly less at zero degrees but with an insignificant impact on split ratio. These patterned area metallic beamsplitters  exhibit minimal angle and wavelength sensitivity giving them a big advantage over other beamsplitters.

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Product SKUs

  • Polka Dot Beam Splitter, Fused Silica, 70:30, 25.4 mm Sq.

    Diagram
    polka-dot-beam-splitter
    PBS-FS-7030-25S
    $143.00
    5 in stock
    Add to cart

    Polka Dot Beam Splitter Specifications | PBS-FS-7030-25S

    Reflecting Transmitting Ratio

    70:30

    Split Ratio Tolerance

    ± 5%

    Operating Range

    250 nm – 2.0 µ

    Substrate

    UV Grade Fused Silica

    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, Fused Silica, 70:30, 12.7 mm Dia.

    Diagram
    polka-dot-beam-splitter
    PBS-FS-7030-12D
    $87.00
    2 in stock
    Add to cart

    Polka Dot Beam Splitter Specifications | PBS-FS-7030-12D

    Reflecting Transmitting Ratio

    70:30

    Split Ratio Tolerance

    ± 5%

    Operating Range

    250 nm – 2.0 µ

    Substrate

    UV Grade Fused Silica

    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, Fused Silica, 70:30, 25.4 mm Dia.

    Diagram
    polka-dot-beam-splitter
    PBS-FS-7030-25D
    $143.00
    Available on backorder
    Add to cart

    Polka Dot Beam Splitter Specifications | PBS-FS-7030-25D

    Reflecting Transmitting Ratio

    70:30

    Split Ratio Tolerance

    ± 5%

    Operating Range

    250 nm – 2.0 µ

    Substrate

    UV Grade Fused Silica

    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, Fused Silica, 70:30, 38 mm Sq.

    Diagram
    polka-dot-beam-splitter
    PBS-FS-7030-38S
    $209.00
    2 in stock
    Add to cart

    Polka Dot Beam Splitter Specifications | PBS-FS-7030-38S

    Reflecting Transmitting Ratio

    70:30

    Split Ratio Tolerance

    ± 5%

    Operating Range

    250 nm – 2.0 µ

    Substrate

    UV Grade Fused Silica

    Size (mm)

    38.0 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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