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BVO IR
BVO IR Linear Polarizer
Active Range: 700 nm – 1,700 nm | Absorptive NIR/IR | Imaging Capable | Doc: BVO.IR.PB.202201
700–1700 nm
3,000:1 Contrast
NIR Imaging
Absorptive
3M HR Replacement
Partial SWIR
BVO IR is the broadband NIR/IR absorptive linear polarizer covering 700 nm to 1,700 nm — the widest true NIR coverage available in the BVO line. The NIR bandwidth reveals unique physics where polarization can increase contrast, reduce glare, select emitted polarized states, and attenuate NIR light. BVO IR handles all of it in one utilitarian polarizer. NIR imaging capable, available in glass components with BBAR coatings optimized for 700–1100 nm or 900–1700 nm. Direct replacement for the discontinued 3M HR polarizer.
3,000:1
Contrast Ratio Nominal
BVO IR Linear Polarizer — Transmission Performance
Input Light: Plane Polarized | Active Range: 700–1700 nm | Tp calculated from measured data; Tc = Tp / Contrast Ratio
Key Features
- Broadest true NIR/IR coverage — 700 nm to 1,700 nm in a single absorptive element
- NIR imaging capable — suitable for cameras and microscopy applications
- Absorptive, non-reflective — no back-reflection artifacts
- 3,000:1 nominal contrast across NIR band
- Covers partial SWIR band extending into 1700 nm
- BBAR anti-reflection coated BK-7 glass components — 700–1100 nm or 900–1700 nm
- PSA conversion available for direct lamination
- Dark green color — visible absorption makes it easy to identify in assembly
- Replaces discontinued 3M HR polarizer — drop-in replacement
- Custom geometry — .dxf routing or laser cutting to 10–25 micron tolerances
- All NIR low-power lasing sources covered across 700–1700 nm
Performance
BVO IR delivers increasing single-pass transmission (Tp) from approximately 16% at 600 nm rising steeply through 700 nm to plateau at 65–69% across the 900–1700 nm NIR band. Contrast ratio is strong throughout — 3,000:1 to 8,000:1 across the active range — with the best performance in the 1000–1400 nm window.
Note on size: BVO IR film is produced in a maximum format of 60 mm × 55 mm — a smaller format than other BVO polarizers. For larger NIR panel applications requiring larger format, see BVO NIR Ultra or NIR HD (400–1000 nm). For SWIR coverage to 2100 nm at larger formats, see BVO SWIR.
Key Wavelength Data
| Wavelength | Tp (%) | Tc (%) | Contrast |
|---|
| 700 nm | 31.9% | 0.008% | 4,065:1 |
| 750 nm | 44.9% | 0.010% | 4,364:1 |
| 800 nm | 56.7% | 0.013% | 4,443:1 |
| 850 nm | 64.2% | 0.015% | 4,389:1 |
| 900 nm | 67.1% | 0.014% | 4,831:1 |
| 950 nm | 68.3% | 0.014% | 5,032:1 |
| 1000 nm | 69.0% | 0.012% | 5,698:1 |
| 1100 nm | 67.8% | 0.010% | 7,112:1 |
| 1300 nm | 67.1% | 0.009% | 7,200:1 |
| 1500 nm | 67.6% | 0.013% | 5,265:1 |
| 1700 nm | 67.2% | 0.038% | 1,765:1 |
Standard Film Specifications
| Parameter | Value |
|---|
| Performance Range | 700 nm – 1,700 nm |
| Contrast Ratio | 3,000:1 nominal |
| Maximum Dimension | 60 mm × 55 mm |
| Thickness w/ PSA | 0.40 mm |
| Film Cut Tolerances | ±50 microns standard; 10–25 microns precision |
| Adhesive (PSA) | None standard; PSA conversion available |
| Temperature Range | −20°C to 80°C |
| Damage Threshold | 1 W/cm² continuous wave; 0.2 J/cm² @ 20 ns pulse |
| Color | Dark Green |
| Substrate | Plastic Cellulose Triacetate, dichroic |
| Surface Quality | 80/50 Scratch-Dig |
Standard Component Specifications (BK-7)
| Parameter | Value |
|---|
| Outer Dimension | 25.4 mm OD ± 0.20 mm |
| Wavefront Distortion | λ/2 measured at 632 nm |
| Thickness | 0.420 mm ± 0.20 mm |
| Substrates | BK-7 optical glass |
| Surface Quality | 40/20 Scratch-Dig |
| Beam Deviation | 2 arc minutes |
| Anti-Reflective Coatings | 700–1100 nm or 900–1700 nm BBAR |
Applications
Surveillance & SecurityNIR/IR polarization for 24/7 surveillance cameras and security imaging systems operating in the 700–1700 nm band.
NIR Cameras & PhotographyImaging-capable NIR polarizer for scientific and industrial NIR cameras. Single element covers the full NIR camera band.
Machine Vision NIR Glare ReductionAbsorptive polarizer eliminates NIR glare in machine vision systems. No back-reflection into sensitive detector arrays.
NIR Semiconductor InspectionSilicon is transparent in the NIR — BVO IR enables polarized NIR inspection of wafers and semiconductor devices.
Multispectral & Agriculture InspectionNIR polarized imaging for food quality, crop health, and agricultural sorting systems in the NIR band.
NIR Raman SpectroscopyPolarized Raman spectroscopy using NIR excitation lasers in the 700–1700 nm range. High contrast, absorptive construction.
NIR Polarized MicroscopyNIR polarization microscopy for materials characterization, fiber orientation analysis, and birefringence measurement.
NIR AstronomyAstronomical polarimetry in the near infrared. Absorptive, no back-reflection — suitable for sensitive detector systems.
NIR ThermographyPolarized NIR thermography for thermal imaging and non-destructive testing applications in the NIR band.
Defect Identification & SortingNIR polarized illumination for defect detection and industrial sorting systems requiring NIR contrast enhancement.
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