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BVO NIR Ultra
BVO NIR Ultra Linear Polarizer
Active Range: 400 nm – 1,000 nm | Broadband VIS/NIR | Imaging | Wire Grid Replacement
400–1000 nm
20,000:1 VIS Contrast
7,000:1 NIR Contrast
Imaging Capable
Wire Grid Replacement
A4 Format
BVO NIR Ultra is a broadband absorptive VIS/NIR hybrid linear polarizer covering 400 nm to 1,000 nm in a single element. The benchmark NIR polarizer in the BVO line — 20,000:1 visible contrast, 7,000:1 NIR contrast, imaging capable, and available up to A4 format. Unlike reflective wire grid polarizers, NIR Ultra is fully absorptive — no back-reflection into the optical system. The direct wire grid polarizer replacement at lower cost and larger aperture.
20,000:1
Visible Contrast (nominal)
7,000:1
NIR Contrast (nominal)
BVO NIR Ultra Linear Polarizer — Transmission Performance
Input Light: Plane Polarized | Active Range: 400–1000 nm | 20,000:1 VIS / 7,000:1 NIR contrast (nominal)
Key Features
- Broadband VIS/NIR coverage: 400 nm to 1,000 nm in a single absorptive element
- 20,000:1 visible / 7,000:1 NIR contrast (nominal)
- Imaging capable — suitable for NIR cameras and microscopy
- Direct wire grid polarizer replacement — absorptive, no back-reflection, lower cost
- Large aperture up to A4 (297 × 210 mm)
- BBAR anti-reflection coated BK-7 glass components — 400–900 nm or 700–1100 nm
- PSA conversion available for direct lamination
- Custom geometry — .dxf routing or laser cutting to 10–25 micron tolerances
- Temperature range: −20°C to 70°C
Key Wavelength Data
| Wavelength | Tp (%) | Tc (%) |
|---|
| 400 nm | 14.8% | 0.004% |
| 450 nm | 51.0% | 0.004% |
| 500 nm | 63.9% | 0.003% |
| 550 nm | 67.2% | 0.003% |
| 700 nm | 74.0% | 0.004% |
| 800 nm | 74.3% | 0.022% |
| 900 nm | 71.0% | 0.009% |
| 1000 nm | 76.9% | 0.033% |
Standard Film Specifications
| Parameter | Value |
|---|
| Performance Range | 400 nm – 1,000 nm |
| Contrast Ratio | 20,000:1 Visible / 7,000:1 NIR (nominal) |
| Maximum Dimension | A4 (297 mm × 210 mm) |
| Film Cut Tolerances | ±50 microns standard; 10–25 microns precision |
| Temperature Range | −20°C to 70°C |
| Substrate | Plastic Cellulose Triacetate, dichroic hybrid |
| Surface Quality Film | 80/50 Scratch-Dig |
| PSA Conversion | Available |
Standard Component Specifications (BK-7)
| Parameter | Value |
|---|
| Outer Dimension | 25.4 mm OD ± 0.20 mm |
| Wavefront Distortion | λ/2 measured at 632 nm |
| Substrates | BK-7 optical glass |
| Surface Quality | 40/20 Scratch-Dig |
| Beam Deviation | 2 arc minutes |
| Anti-Reflective Coatings | 400–900 nm or 700–1100 nm BBAR |
Applications
Wire Grid Polarizer ReplacementAbsorptive, no back-reflection, lower cost, A4 aperture — designed as the direct wire grid replacement.
NIR Camera PolarizationImaging-capable NIR polarizer for scientific and industrial NIR cameras. Single element covers full VIS+NIR band.
Fundus / Retinal ImagingAbsorptive VIS/NIR polarizer eliminates specular glare without back-reflection into sensitive detector arrays.
NIR Polarized MicroscopyImaging-grade wavefront quality for NIR polarization microscopy and materials characterization.
Machine Vision NIRBroadband VIS+NIR glare reduction and contrast enhancement for machine vision cameras.
NIR PolarimetryBroadband Stokes polarimetry spanning 400–1000 nm in a single absorptive element.
Vein Viewing / BiometricsNIR polarized imaging for vein mapping, iris recognition, and NIR biometric systems.
Multispectral ImagingSingle polarizer covering full VIS and NIR for multispectral imaging platforms.
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