BVO 777 Polarizer
BVO 777 is one of the cheapest imaging capable hybrid linear polarizers. It covers the important short NIR laser diode / LED lines of 740nm, 780nm and 785nm. Additionally, it has solid visible polarizer performance making it a good hybrid choice for imaging and all other applications. Consider BVO 777 linear polarizer if you need to cover near infrared and visible wavelengths at a minimum cost.
Visible / Near Infrared Dichroic Linear Polarizer
- Active Range: 420nm – 800nm
- Hybrid Visible / NIR polarizer
- Type – transmissive, absorptive
- Polarize 740nm, 780nm LED’s
- Polarize 785nm laser diodes
- Lowest cost Visible / NIR coverage
- Imaging capable
- BBAR coated BK-7 components available
- Replaces 3M polarizer – HN 22
Applications
- Biotech Instruments
- Machine Vision Imaging – Glare Reduction
- NIR Sensors – Optical, Solid State
- NIR Cameras
- Magnetometers
- Vein Viewing Polarization Contrast
- Multispectral Imaging – Retina
- Agriculture Inspection
- Biometrics Polarization
- Polarized Microscopy
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 | 420nm – 800nm |
| Contrast Ratio | > 5,000:1, nominal |
| Maximum Dimension | 450mm x 300mm |
| Thickness | .44mm |
| Film Cutting Tolerances | ± 50 microns |
| Adhesive (PSA) | None, PSA option available |
| Temperature Range | -20° C to 60° C |
| Damage Threshold | 1 W/cm2, CW 0.2 J/cm2 with 20 nsec pulse, visible |
| Color | Neutral Gray |
| 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 ≤ .65% / surface, average. 400nm-900nm |
| 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
