Broadband Beamsplitting Polarizer

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Broadband Beamsplitting Polarizer

For applications involving broadband or tunable wavelength sources, Meadowlark Optics presents a line of Broadband Beamsplitting Polarizers covering the visible to near infrared region. These cubes offer increased utility for a range of polarization needs. As with the Laser Line Beamsplitting Polarizers, two usable polarization forms result, conveniently separated by 90°. For unpolarized input, incident light will be equally split, 50% transmitted and reflected. Varying the input polarization axis will change the split ratio. These broadband designs require well-collimated input and accurate angular alignment for optimal performance. All four entrance and exit faces are antireflection coated to minimize losses.

  • High contrast
  • Low reflectance
  • Broad spectral range
  • High damage threshold

Specifications - Broadband Beamsplitting Polarizer
Wavelength Range
Visible
Near IR1
Near IR2
Near IR3
440-680 nm
620-900 nm
820-1250 nm
1150-1600 nm
Substrate Material SF 2
Transmitted Wavefront Distortion
(P-V @ 632.8 nm)
(P-V @ 632.8 nm)
≤ λ/5 for p-polarized beam
Beam Deviation
Transmitted
Reflected
≤ 3 arc-min
≤ 6 arc-min
Reflectance (per surface) ≤ 0.5%
Contrast Ratio
Transmitted
Reflected
≥ 500:1
≥ 20:1
Transmission
p-polarized light
s-polarized light
≥ 95% transmitted
≥ 98% reflected
Clear Aperture Central 80% diameter
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 - Broadband Beamsplitting Polarizer
Clear Aperture Dimensions
± 0.020 in.
[± 0.51 mm]
Part Number
Visible (440-680)
0.40 × 0.40 × 0.40
[10.2 x 10.2 x 10.2]
0.50 × 0.50 × 0.50
[12.7 x 12.7 x 12.7]
BB-050-VIS
0.80 × 0.80 × 0.80
[20.3 × 20.3 × 20.3]
1.00 × 1.00 × 1.00
[25.4 × 25.4 × 25.4]
BB-100-VIS
Near IR1 (620-900 nm)
0.40 × 0.40 × 0.40
[10.2 x 10.2 x 10.2]
0.50 × 0.50 × 0.50
[12.7 x 12.7 x 12.7]
BB-050-IR1
0.80 × 0.80 × 0.80
[20.3 × 20.3 × 20.3]
1.00 × 1.00 × 1.00
[25.4 × 25.4 × 25.4]
BB-100-IR1
Near IR2 (820-1250 nm)
0.40 × 0.40 × 0.40
[10.2 x 10.2 x 10.2]
0.50 × 0.50 × 0.50
[12.7 x 12.7 x 12.7]
BB-050-IR2
0.80 × 0.80 × 0.80
[20.3 × 20.3 × 20.3]
1.00 × 1.00 × 1.00
[25.4 × 25.4 × 25.4]
BB-100-IR2
Near IR3 (1150-1600 nm)
0.40 × 0.40 × 0.40
[10.2 x 10.2 x 10.2]
0.50 × 0.50 × 0.50
[12.7 x 12.7 x 12.7]
BB-050-IR3
0.80 × 0.80 × 0.80
[20.3 × 20.3 × 20.3]
1.00 × 1.00 × 1.00
[25.4 × 25.4 × 25.4]
BB-100-IR3
Custom sizes are available.
Please contact our Sales Department

 

Learn More
White Paper:   Finding the Optimal Polarizer