BVO 38 Polarizer

BVO 38 linear polarizer is the solution to outdated optical drawings calling for the old Polaroid / 3M HN 38 visible polarizer. Legacy can be important as to not repeat re-qualification in optical systems. Some applications do call for a lower transmission polarizer, BVO 38 meets the challenge.

Visible Dichroic Linear Polarizer

  • Active Range: 420nm – 750nm
  • 38% nominal transmission
  • Type – transmissive, absorptive
  • Legacy polarizer – replacement for deprecated optical drawings
  • Covers 750nm LED’s
  • Extended visible wavelength range
  • BBAR coated BK-7 components available
  • Polarizer film available with or without PSA
  • Replaces 3M polarizer – HN 38


  • Support Outdated Drawing Specifications
  • Photography
  • Glare Reduction
  • Optical Signal Processing Instruments
  • Sensors

Spec Downloads

Precision Polarizer - Glass Laminated Components
Precision Polarizer – Glass Laminated Components
OEM Volume - Custom Specs Reduced Cost
OEM Volume – Custom Specs Reduced Cost
Raw Polarizer - Precision Volume Cut or Custom Mounted
Raw Polarizer – Precision Volume Cut or Custom Mounted

Film Specifications

Polarizer Range 420nm – 760nm
Contrast Ratio 2,500:1, nominal
Maximum Dimension 1000mm x 620mm
Thickness .190mm
Film Cutting Tolerances ± 50 microns
Adhesive (PSA) Yes, non PSA option available
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

Component Specifications

Outer Dimension 25.4mm ± 0.20mm
Wavefront Distortion Lambda/2 measured @ 632nm
Thickness 4.25mm ± 0.20mm
Substrates BK-7
Surface Quality 40/20 Scratch-Dig
Beam Deviation 2 arc minutes
Anti Reflection Coatings R ≤ 0.65% / surface, average. 400-900nm
Environmental Tolerance -10˚ C to 70˚ C

Glass & Coating

Optical Grade BK-7
  • Industry standard optics glass
  • Good transmission visible and NIR
  • Best for low wavefront distortion
  • Thickness flexibility
  • Double side polished, lambda/10 surface flatness
  • Refractive index – 1.52
  • R ≤ .65% per surface, avg.
  • Ultra broad range, 400nm to 900nm
  • pdfView Optical Grade BK-7 Specs

    Corning Display Glass
    • Thin glass, excellent clarity
    • No residual birefringence
    • Imaging quality flatness
    • Thin substrates – .7mm, 1.1mm each
    • Refractive index – 1.50
  • R ≤ .65% per surface, avg.
  • Visible range, 425nm to 685nm
  • pdfView Corning Eagle 2000 Specs

    • No residual birefringence
    • Cheapest option for laminated products
    • Digitally cut for all geometric shapes
    • Thin substrates – flexible
    • Refractive index – 1.49

    pdfView Acrylic Specs

    BK-7 Transmission
    Corning Eagle Glass Transmission
    BBAR 400nm-900nm, BK-7 Coating Scan
    HEA BBAR 425nm-685nm, Display Glass Coating Scan