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Broadband dielectric cube beamsplitters have a nominal split ratio of 50/50 for randomly or circularly polarized light. For other polarizations, the split ratio may vary significantly.
If the beam is randomly polarized, the split beams will be linearly polarized (weakly). If the incoming beam is circularly polarized, the split beams will be elliptically polarized.
For your design,please refer to their following characteristics:
 The dielectric coating has negligible absorption.
Reflected and transmitted beams have similar intensities for
average s- and p-polarizations over a broad wavelength range.
These beamsplitters are extremely polarization sensitive.
 Standard Specifications:
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Optical Material:
Diameter Tolerance:
Surface Quality:
Surface Flatness:
Beam Deviation:
Nominal T/R Ratio:
Clear Aperture:
Bevel:
Coating:
Available Wavelength: |
BK7 grade A optical glass
±0.2mm
60-40 scratch and dig
lambda/4 at 632.8nm
<10 arc minutes
50/50 ±5% for average polarization
>85%
<0.25mm X 45°
Antireflection coating on entrance and exit faces.
Visible and Near Infrared. |
Standard Broadband Dielectric Cube Beamsplitters
Dimension(mm) |
Product Number |
450-650nm |
650-900nm |
900-1200nm |
1200-1550nm |
10.0x10.0x10.0 |
UQT-BDB0101 |
UQT-BDB0201 |
UQT-BDB0301 |
UQT-BDB0401 |
12.7x12.7x12.7 |
UQT-BDB0102 |
UQT-BDB0202 |
UQT-BDB0302 |
UQT-BDB0402 |
15.0x15.0x15.0 |
UQT-BDB0103 |
UQT-BDB0203 |
UQT-BDB0303 |
UQT-BDB0403 |
20.0x20.0x20.0 |
UQT-BDB0104 |
UQT-BDB0204 |
UQT-BDB0304 |
UQT-BDB0404 |
25.4x25.4x25.4 |
UQT-BDB0105 |
UQT-BDB0205 |
UQT-BDB0305 |
UQT-BDB0405 |
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| Please Contact ultiQuest for other dimensions in prototype and production quantities. |
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| NOTES! |
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The transmittance curve is a graph based on actual measurements and may vary from production lot to production lot. |
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The surface flatness is the reflected wavefront distortion of the surface before coating. |
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Plate-type nonpolarizing beam splitters are also provided upon request. |
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Be sure to wear laser safety goggles when checking optical path and adjusting optical axis. |
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