BVO IR Polarizer
The Cadillac of NIR polarization, BVO IR covers all near infrared polarizer applications required by imaging or solid state instruments. The NIR bandwidth reveals unique physics where polarization can increase contrast, reduce glare, select emitted polarized states and attenuate NIR light. All can be done with this utilitarian polarizer.
Near Infrared DIchroic Linear Polarizer
- Active Range: 700nm – 1,700nm
- Best true NIR polarizer
- Type – transmissive, absorptive
- Polarize 740nm, 780nm, 850nm, 870nm, and 940nm LED’s
- Polarize 785nm, 808nm, 830nm, 905nm, 980nm, and 1,064nm laser diodes
- Polarize 1,310nm and 1,550nm optical communications
- All NIR low power lasing sources
- NIR Imaging capable
- BBAR coated BK-7 components available
- Polarize portion of SWIR
- Replaces 3M polarizer – HR
Applications
- Surveillance & Security
- Defect Identification for Sorting
- Machine Vision Imaging – Glare Reduction
- NIR Sensors – Optical, Solid State
- Multispectral Imaging
- Agriculture Inspection
- NIR Polarized Microscopy
- NIR Cameras, Photography
- NIR Semiconductor Inspection
- NIR Raman Polarized Spectroscopy
- NIR Astronomy
- NIR Thermography
Spec Downloads
Precision Polarizer – Glass Laminated Components
OEM Volume – Custom Specs Reduced Cost
Raw Polarizer – Digitally Cut to Shape or Custom Mounted
Film Specifications
| Polarizer Range | 700nm – 1,700nm |
| Contrast Ratio | 3,000:1, nominal |
| Maximum Dimension | 60mm x 55mm |
| Thickness | .40mm |
| Film Cutting Tolerances | ± 50 microns |
| Adhesive (PSA) | None |
| Temperature Range | -20° C to 60° C |
| Damage Threshold | 1 W/cm2, CW 0.2 J/cm2 with 20 nsec pulse, visible |
| Color | Dark Green |
| Substrate | Plastic Type, “Cellulose Triacetate”, dichroic |
| Surface Quality | 80/50 Scratch-Dig |
Component Specifications
| Outer Dimension | 25.4mm OD ± 0.20mm |
| Wavefront Distortion | Lambda/2 measured @ 632nm |
| Thickness | 4.5mm, ± 0.20mm |
| Substrates | BK-7 |
| Surface Quality | 40/20 Scratch-Dig |
| Beam Deviation | 2 Arc Minutes |
| Anti Reflection Coatings | R ≤ 0.65% / surface, average. 400nm-900nm R ≤ 0.65% / surface, average. 700nm-1,100nm R ≤ 0.65% / surface, average. 900nm-1,700nm |
| Environmental Tolerance | -10° C to 60° C |
OPTIONAL LAMINATION SUBSTRATES :
Optical Grade BK-7
Low Wavefront Distortion Glass
- Industry standard optics glass
- Good transmission visible and NIR
- Best for low wavefront distortion
- Thickness flexibility
- Double side polished, lambda/10 flatness
- Refractive index – 1.52
BK-7 Glass Transmission Chart
Bk-7 Optional NIR BBAR COATING
- R ≤ .65% per surface, avg.
- Ultra broad range, 400nm to 950nm
400-950nm BBAR on BK-7 scan – typical
Corning Display Glass
Results in thin final components
- Thin glass, excellent clarity
- No residual birefringence
- Imaging quality flatness
- No added heavy metals
- 0.5, 0.7mm, 1.1mm options for thickness
- Refractive index – 1.50
Corning Glass Transmission Chart
Eagle XG Optional NIR BBAR COATING
- R ≤ .65% per surface, avg.
- Ultra broad range, 400nm to 950nm
400-950nm BBAR on Eagle XG scan – typical
Non-Birefringent Acrylic
Inexpensive Complex Shapes
- No residual birefringence substrate
- Cheapest option for laminated products
- Digitally cut for all geometric shapes
- Thin flexible substrate (bends)
- 0.2mm – 5.0mm options for thickness
- Refractive index – 1.49
Non-birefringent acrylic transmission chart
