• Regular Plate Beamsplitters

    Plate Beamsplitter
    1. Substrate
      •  Material: UV fused silica or BK7 window
      • Clear Aperture: larger than central 85% of diameter
      • Surface Quality: 10-5 Scratch-Dig
      • Surface Flatness: λ/10 @633nm over clear aperture
      • Diameter tolerance: +0.000/-0.010" (+0.00/-0.25mm)
      • Thickness tolerance: ±0.010" (±0.25mm)
      • Bevel: <0.5mm @45° typical
      • Wedge: ≤5 arc min
    2. Other Specifications
      • Coating: E-beam multilayer dielectric
      • Angle of Incidence: 45° Light Path at Plate Beamsplitter
      • 2nd surface: Anti-reflection coating
      • Damage Threshold: 10J/cm2, 20ns, 20Hz; 1MW/cm2, CW @1064nm

      In some applications cube beamsplitters are not appropriate, and instead plate-type splitters are employed. For the highest levels of wavefront fidelity and power handling, conventional coated BK7 or fused silica plates are excellent choices.
      Spectral Optics provides various R/T ratio regular plate beamsplitters coated with an all dielectric coating. They have almost no absorption and are designed for 45° (or other angle of incidence) at a specific wavelength and a polarization (S-pol, P-pol, or unpol). The 2nd side of the window has an anti-reflection coating.

      Please click HERE for the polarizing plate beamsplitters.

    Product List: RPBS - λ  - R - AOI&Pol - Size - Material

    RPBS - λ (nm) R (%) AOI
    & POL    		 Size Code Material Price (USD)
    248, 266, 308,
    337, 355, 400,
    488, 532, 633,
    670, 780, 800,
    850, 980,1030,
    1064, 1319, 1550,
    1850, etc     		20 (±5), 30 (±5),
    40 (±5), 50 (±5),
    60 (±5), 70 (±5),
    80 (±5), 90 (±3),
    95 (±2), 98 (±1),
    99 (±0.5), etc
    		 45S,
    45P,
    45U,
    etc    		 -1025-
    (1.0" X 0.25")    		 FS

    $310 (<300nm)

    $280 (<400nm)

    $220 (≥400nm)
    BK $200 (≥400nm)
    -1525-
    (1.5" X 0.25")    		 FS

    $365 (<300nm)

    $330 (<400nm)

    $260 (≥400nm)
    BK $235 (≥400nm)
    -2025-
    (2.0" X 0.25")    		 FS

    $450 (<300nm)

    $400 (<400nm)

    $300 (≥400nm)
    BK $270 (≥400nm)
    -3050-
    (3.0" X 0.50")    		 FS CALL
    BK $670 (≥400nm)
    -4050-
    (4.0" X 0.50")    		 FS CALL
    BK $995 (≥400nm)

    EX, RPBS-248-50-45U-1025-FS: Plate BeamSplitter, 248nm, 50% (±5) R, 45˚ Unpolarization, 1.0" dia X 0.25" thickness, Fused Silica.

    NOTE:
    1. The selection of the substrate material is dependent on the wavelength. Below 400nm, the UV fused silica is recommended.
    2. Any other wavelength and R/T ratio can be supplied on request.
    3. Other angle of incidence is also available.
    4. Please describe your custom requirements on the RFQ form.
       

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