Laser Line Beamsplitting Polarizer

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Laser Line Beamsplitting Polarizer

  • High contrast
  • Low reflectance
  • Low transmitted wavefront distortion


Right-angle prisms are matched in pairs to produce high quality laser line beamsplitting polarizers with superior wavefront quality in both transmission and reflection. The hypotenuse face of one prism is coated with a multilayer dielectric beamsplitting coating optimized for laser performance. Two prisms are cemented together, protecting the critical coating from performance-degrading environmental factors. Each cube separates an unpolarized incident beam into two orthogonal, linearly polarized components with negligible absorption. Following the principle of pile-of-plates polarizers, p-polarized light is transmitted with approximatley 1000:1 contrast and s-polarization is reflected with approximatley 20:1 contrast. These polarizers perform best with collimated or near-collimated light.

White Paper:   Finding the Optimal Polarizer

Specifications - Laser Line Beam Splitting Polarizers
Substrate N-BK7
Transmitted Wavefront Distortion
(P-V @ 632.8 nm)
(P-V @ 632.8 nm)
≤ λ/5 for p-polarized beam
Surface Quality (scratch-dig) 40-20
Beam Deviation
≤ 3 arc-min
≤ 6 arc-min
Reflectance (per surface) ≤ 0.5%
Contrast Ratio
≤ 500:1
≤ 20:1
p-polarized light
s-polarized light
≥ 95% transmitted
≥ 99% reflected
Acceptance Angle ± 2˚
Storage Temperature -40˚C to +100˚C
Operating Temperature -40˚C to +100˚C
Laser Damage Threshold 500 W/cm2, CW
300 mJ/cm2, 10 ns, visible
200 mJ/cm2, 10 ns, 1064 nm


Ordering Information - Laser Line Beam Splitting Polarizer
± 0.020 in.
[± 0.51 mm]
Part Number
0.50 × 0.50 x 0.50
[12.7 x 12.7 x 12.7]
1.00 × 1.00 × 1.00
[25.4 × 25.4 × 25.4]
Please substitute your wavelength in nanometers for λ
Custom sizes and wavelengths, over 400-1600 nm are available.
Call us for pricing on nonstandard wavelengths, sizes, or shapes.