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BVO SWIR
BVO SWIR Linear Polarizer
Active Range: 400 nm – 2,100 nm | Ultra-Broadband VIS + NIR + SWIR | Absorptive
>153,000:1 Peak Contrast
400–2100 nm
VIS + NIR + SWIR
Single Element
Absorptive
BVO SWIR is an ultra-broadband absorptive linear polarizer covering 400 nm to 2,100 nm — the widest single-element spectral coverage in the BVO product line and among the broadest absorptive polarizers available anywhere. A single BVO SWIR element covers the complete visible, NIR, and SWIR bands, eliminating the need for multiple polarizers in broadband systems. Peak measured contrast exceeds 153,000:1 at approximately 900 nm, with contrast above 1,000:1 maintained from 437 nm to 2,100 nm.
Contact BVO for availability and specifications. BVO SWIR does not have a dedicated website page. Contact
[email protected] or
303.440.3327 to discuss your SWIR polarization application.
>153,000:1
Peak Contrast at ~900 nm
400–2100 nm
Full Active Range
437–2100 nm
CR >1,000:1 Range
BVO SWIR Linear Polarizer — Transmission Performance
Input Light: Plane Polarized | Measured Range: 400–2100 nm | Tp and Tc: measured data
Key Features
- Ultra-broadband: 400 nm to 2,100 nm — single element covers full VIS, NIR, and SWIR
- Peak measured contrast >153,000:1 at approximately 900 nm
- Contrast above 1,000:1 maintained from 437 nm to 2,100 nm
- Absorptive, non-reflective — no back-reflection into the optical system
- Eliminates multiple polarizers in broadband VIS/NIR/SWIR systems
- Ideal for InGaAs camera polarization — covers full InGaAs response band (900–1700 nm)
- Covers all SWIR imaging bands: 1000–1700 nm, 1100–1700 nm, 1400–1700 nm
- High Tp across NIR and SWIR — 65–82% from 600 nm to 2000 nm
- PSA conversion available for direct lamination to optical surfaces
- Custom geometry — .dxf routing or laser cutting to 10–25 micron tolerances
- Contact BVO for format availability, sizing, and component options
Performance
BVO SWIR delivers exceptional performance across an extraordinarily wide bandwidth. From 400 nm, Tp rises steeply from ~20% to a plateau of 60–65% through the visible and NIR. Contrast is exceptional in the 600–950 nm window — exceeding 90,000:1 at 700 nm and peaking above 153,000:1 near 900 nm — before transitioning to a SWIR regime where contrast remains 2,000–5,000:1 with Tp rising to 80%+ above 1200 nm.
The transition near 1000 nm reflects a change in the dominant absorption mechanism as the film moves from NIR to SWIR performance. Both bands deliver strong, usable contrast well above the requirements for most SWIR imaging and sensing applications.
Key Wavelength Data
| Wavelength | Tp (%) | Tc (%) | Contrast | Band |
|---|
| 400 nm | 19.6% | 0.056% | 351:1 | Visible — rising |
| 500 nm | 55.8% | 0.008% | 7,110:1 | Visible — good contrast |
| 600 nm | 64.0% | 0.001% | 62,359:1 | VIS/NIR — excellent contrast |
| 700 nm | 65.6% | 0.001% | 90,047:1 | NIR — exceptional contrast |
| 800 nm | 61.9% | 0.001% | 79,499:1 | NIR — exceptional contrast |
| 900 nm | 61.0% | 0.001% | 109,489:1 | NIR — peak contrast zone |
| 1000 nm | 65.7% | 0.018% | 3,593:1 | NIR/SWIR transition |
| 1100 nm | 75.2% | 0.023% | 3,341:1 | SWIR — good contrast |
| 1300 nm | 81.4% | 0.038% | 2,143:1 | SWIR — good contrast |
| 1500 nm | 81.2% | 0.030% | 2,687:1 | SWIR — good contrast |
| 1700 nm | 69.5% | 0.015% | 4,538:1 | SWIR — good contrast |
| 2000 nm | 77.0% | 0.022% | 3,544:1 | SWIR — good contrast |
| 2100 nm | 70.4% | 0.059% | ~1,200:1 | SWIR — upper limit |
Specifications
| Parameter | Value |
|---|
| Performance Range | 400 nm – 2,100 nm |
| CR >1,000:1 Range | 437 nm – 2,100 nm |
| Peak Contrast Ratio | >153,000:1 at ~900 nm (measured) |
| Polarizer Type | Transmissive, absorptive, dichroic |
| Film Cut Tolerances | ±50 microns standard; 10–25 microns precision |
| Adhesive (PSA) | PSA conversion available |
| Substrate | Dichroic absorptive film |
| Custom Geometry | .dxf routing or laser cutting available |
| Format / Size | Contact BVO for availability |
| Glass Components | Contact BVO for laminated component options |
| Availability | Contact BVO directly — [email protected] |
Applications
InGaAs Camera PolarizationBVO SWIR covers the full InGaAs detector response band (900–1700 nm) and beyond. Single absorptive polarizer — no back-reflection into sensitive InGaAs arrays.
SWIR Hyperspectral ImagingSingle polarizer covering 400–2100 nm for broadband hyperspectral systems. Eliminates multiple polarizers at different SWIR sub-bands.
Plastics & Polymer IdentificationSWIR polarized imaging for plastics sorting and polymer identification. Many polymers show unique SWIR spectral signatures requiring polarization contrast.
Fruit & Food NIR/SWIR InspectionBroadband polarized imaging for moisture content, bruise detection, and quality sorting in the NIR and SWIR bands.
Broadband NIR + SWIR PolarimetrySingle polarizer for Stokes polarimetry spanning VIS through SWIR. Exceptional contrast in the 600–950 nm zone with solid SWIR performance to 2100 nm.
Defense SWIR ImagingSWIR polarization for airborne and ground imaging systems. Absorptive construction — no back-reflection into detector arrays. Covers full defense SWIR band.
Solar Cell & PV InspectionNIR/SWIR polarized inspection of photovoltaic cells and solar panels. Silicon is transparent in the NIR/SWIR — polarization reveals subsurface defects.
Medical NIR/SWIR ImagingBroadband NIR and SWIR polarized imaging for tissue characterization, vein mapping, and subsurface medical imaging.
Contact Bolder Vision Optik
