Thin Film Linear Polarizer, 400-1700nm
Tuniu’s thin-film linear polarizers cover a spectral range of 400–1700 nm, satisfying polarization application requirements across visible and near-infrared bands. Adopting a sandwich configuration, the absorptive polarizing film is sandwiched and protected by two ultraviolet fused silica windows. Each window’s air-facing surface is coated with anti-reflection film. To avoid performance degradation of the polarizing film caused by mounting stress, the polarizer is assembled in standard aluminum alloy snap rings or SM lens barrels.
Two standard versions are available: The 400–700 nm model features air-glass AR coatings optimized for 350–700 nm; the 700–1700 nm version is coated for 700–1700 nm. Both versions deliver high transmittance and high extinction ratio within their respective working bands, ideal for a variety of low-power laser laboratory applications.
Parameters
Linear Polarizer, Ø25.4 mm, 20.0 mm CA, 400-700 nm, Mounted in 25.4 mm-OD Retaining Ring
| Material | Absorption polarization film/ UV fused silica window | Working wavelength | 400-700 nm |
| Extinction ratio | > 2,000: 1@400-450 nm > 10,000: 1@450-650 nm > 5,000: 1@650-700 nm | Anti-reflective coating | Anti-reflective coating, Ravg < 0.5%@350-700 nm |
| Thickness | 3.3 mm | Surface quality | 40/20 |
| Surface parallelism | < 3 arcmin | Incident angle (AOI)± 20° | ± 20° |
| Transmitted wavefront difference | < λ/2 @ 632.8 nm | Enclosure | Standard snap ring with an outer diameter of 25.4 mm |
| Damage threshold | 0.7 J/cm2, 515 nm, 202 fs, 10 Hz(anti-reflective coating) 0.4 J/cm2, 515 nm, 202 fs, 10 Hz(Polarizing coating) | ||
Linear Polarizer, Ø25.4 mm, 20.0 mm CA, 700-1700 nm, Mounted in 25.4 mm-OD Retaining Ring
| Material | Absorption polarization film/ UV fused silica window | Working wavelength | 700-1700 nm |
| Extinction ratio | > 1,500: 1@700-1700 nm | Anti-reflective coating | Anti-reflective coating, Ravg < 1%@650-1700 nm |
| Thickness | 4.0 mm | Surface quality | 40/20 |
| Surface parallelism | < 3 arcmin | Incident angle (AOI) | ± 20° |
| Transmitted wavefront difference | < λ/2@632.8 nm | Enclosure | Standard snap ring with an outer diameter of 25.4 mm |
| Damage threshold | 0.4 J/cm2, 1030 nm, 230 fs, 10 Hz(Anti-reflective coating) 0.3 J/cm2, 1030 nm, 230 fs, 10 Hz(Polarizing coating) | ||
Model
| Working wavelength, nm | Extinction ratio | Clear aperture, mm | Mount |
| 400-700 | > 2000: 1@400-450 nm, > 10000: 1@450-650 nm, > 5000: 1@650-700 nm | 20.0 | Mounted in 25.4-mm-OD Retaining Rings |
| 10.0 | Mounted in SM05 Lens Tube | ||
| 45.0 | Mounted in SM2 Lens Tube | ||
| 700-1700 | > 1500: 1@700-1700 nm | 20.0 | Mounted in 25.4-mm-OD Retaining Rings |
| 10.0 | Mounted in SM05 Lens Tube | ||
| 45.0 | Mounted in SM2 Lens Tube |