BVO NIR Polarizers

All new, purely absorptive broadband NIR linear polarizers. There are no wire grid films in any of these NIR products and often have increased contrast ratios. NIR Ultra is intended for max performance required by demanding biometric imaging applications. NIR HD (high durability) is ideal for applications with damage threshold or environmental tolerance requirements. NIR HD also has a larger format size option for illumination panels. NIR DS2 offers the highest contrast ratio in the NIR bandwidth. Polarized near infrared light makes previously invisible defects identifiable. 

BVO NIR ULTRA –
BROADBAND LINEAR POLARIZER

  • Very high contrast ratios
  • Replace wire grid polarizer
  • Active Range: 400nm – 1000nm
  • Hybrid Visible / NIR polarizer
  • Type – transmissive, absorptive
  • A4 sheet format
  • Imaging capable

Applications

  • Vein Viewing Polarizer
  • Fundus Camera Polarizer
  • NIR Sensors – Optical, Solid State
  • Biometrics Polarization
  • Broadband Machine Vision Glare Reduction
  • Retroreflective Sensor Polarizer
Downloads
retinal health – biometrics
Retina
Retinal Imaging Using Fundus Cameras

BVO NIR Polarizers increase the contrast for imaging veinous pattern and tissue health in the retina. BVO NIR broadband polarizers also work in visible light allowing for imaging throughout the 400-1000nm bandwidth. 

Key advantages by using BVO NIR polarizers
  • Lower cost than competing high contrast glass polarizers
  • Custom piece sizes, high resolution .dxf patterns
  • Absorptive polarizer, no back reflections in optical system

BVO NIR HD – High Durability
BROADBAND LINEAR POLARIZER

  • High contrast ratios
  • Resists LED “burn in”
  • Active Range: 400nm – 1000nm
  • Hybrid Visible / NIR polarizer
  • Type – transmissive, absorptive
  • Large sheet format – in development
  • High durability for illumination systems
  • Optical systems in high humidity

Applications

  • Polarizer for High Intensity LEDs – No Burn
  • Fruit Inspection Illumination Lighting
  • NIR Sensors – Optical, Solid State
  • Automotive Applications
  • Plastics Sorting, Recycling Identification
  • Semiconductor & PCB Inspection
Downloads
Food inspection – Multispectral quality control
Meat Inspection
Using machine vision for fruit inspection sorting and meat quality control

BVO NIR Polarizers eliminate glare in high speed machine vision sorting systems. NIR broadband polarizers are designed to meet optical system specifications requiring higher damage thresholds (from LEDs) and challenging environmental conditions. 

Key advantages by using BVO NIR polarizers
  • High durability polarizers to combat LCD “burn”
  • Larger panel sizes for custom illumination components
  • Increased NIR extinction helps identify target defects
  • Matching camera polarizer with custom sizes
Lemons Inspection

BVO NIR DS2 – High Durability
BROADBAND LINEAR POLARIZER

  • Highest contrast ratio available
  • Resists LED “burn in”
  • Active Range: 550nm – 1100nm
  • Broadband NIR polarizer
  • Type – transmissive, absorptive
  • A4 sheet format

Applications

  • Ultra Contrast Machine Vision Polarizer
  • LED Illumination Lighting
  • High Contrast NIR Cameras & Sensors
  • Automotive Applications
  • Plastics Sorting, Recycling Identification
  • Optical Systems in Demanding Environmental Conditions
Downloads
Recycling – High accuracy machine vision
Plastics Inspection
sorting identification for plastics recycling

BVO NIR Polarizers offer high extinction ratios for modern LED visible and near infrared sources. Rapid evaluation of plastic species using NIR imaging systems requires precision results in order to properly reimburse customers.

Key advantages by using BVO NIR polarizers
  • No internal back reflections causing stray light
  • Maximum contrast for machine vision systems
  • NIR DS2 has > 30,000:1 extinction, 830nm-950nm
  • NIR achromatic optical isolators  (700-1000nm) available

  NIR Ultra Film Specs

Polarizer Range 400nm-1000nm
Contrast Ratio Visible 20,000:1, nominal
Contrast Ratio NIR 7,000:1, nominal
Maximum Dimension A4, 297mm x 210mm
Thickness .345mm
Film Cutting Tolerances ± 50 microns
Adhesive (PSA) None , PSA conversion option
Temperature Range -20° C to 70° 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

  NIR HD Film Specs

Polarizer Range 400nm-1000nm
Contrast Ratio Visible 20,000:1, nominal
Contrast Ratio NIR 5,000:1, nominal
Maximum Dimension > A4, in development
Thickness .423mm
Film Cutting Tolerances ± 50 microns
Adhesive (PSA) None , PSA conversion option
Temperature Range -20° C to 95° 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

  NIR DS 2 Film Specs

Polarizer Range 550nm-1065nm
Contrast Ratio 28,000:1, VIS/NIR nominal
Maximum Dimension A4, 297mm x 210mm
Thickness .390mm
Film Cutting Tolerances ± 50 microns
Adhesive (PSA) None , PSA conversion option
Temperature Range -20° C to 90° 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

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

pdfView Optical Grade BK-7 Specs

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

pdfView Corning Eagle 2000 Specs

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

pdfView Acrylic Specs

Non-birefringent acrylic transmission chart