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.
Specifications - Broadband Beamsplitting Polarizer | |
Wavelength Range | |
Visible Near IR1 Near IR2 Near IR3 |
440-680 nm 650-1000 nm 900-1400 nm 1200-1600 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 (650-1000 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 (900-1400 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 (1200-1600 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 |