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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