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Coated polarizing cube beamsplitters are available for twelve
common laser wavelengths, from the ultraviolet to the infrared, providing
a polarization purity of 98 percent or better at their design
wavelength.
For normal incidence, monochromatic, unpolarized light:
 The incident beam is separated into two polarized beams
which emerge through adjacent faces and in directions
90 degrees apart.
The beam that passes straight through the cube emerges as
linearly p-polarized, with the electric field vector parallel to
the plane of incidence.
The beam that emerges from the cube at right angles to the
incident beam is linearly s-polarized, with the electric field
vector orthogonal to the plane of incidence.
When used with a linearly polarized monochromatic incident
beam:
The incident beam is similarly divided.
The ratio of the emergent beam irradiances depends on the
orientation of the incident beam electric field vector.
For greater extinction, each cube can be replaced by a pair of
cubes in identical orientation. The resulting extinction ratio will
be the square of a single pair.
 Standard Specifications:
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Optical Material:
Diameter Tolerance:
Surface Quality:
Surface Flatness:
Beam Deviation:
Principal Transmittance:
Principal Reflectance:
Clear Aperture:
Bevel:
Coating:
Available Wavelength:
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BK7 grade A optical glass
±0.2mm
40-20 scratch and dig
lambda/4 at 632.8nm
<10 arc minutes
Tp>95% AND Ts<1%
Rs>99% AND Rs<5%
>85%
<0.25mm X 45°
Broadband antireflection coating on entrance and exit faces.
488, 532, 632.8, 650,780, 808, 850, 980, 1047, 1053, 1064, 1310, 1319, 1342 1550 nm |
Standard Laser-line Polarizing Cube Beamsplitters
Dimension(mm) |
Shape |
Nominal R/T Ratio |
Product Number |
10.0x10.0x10.0 |
Square |
50/50 |
UQT-LPB0501 |
12.7x12.7x12.7 |
Square |
50/50 |
UQT-LPB0502 |
15.0x15.0x15.0 |
Square |
50/50 |
UQT-LPB0503 |
20.0x20.0x20.0 |
Square |
50/50 |
UQT-LPB0504 |
25.4x25.4x25.4 |
Square |
50/50 |
UQT-LPB0505 |
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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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Be sure to wear laser safety goggles when checking optical path and adjusting optical axis. |
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