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BVO 38 linear polarizer is the solution to outdated optical drawings calling for the old Polaroid / 3M HN 38 visible polarizer.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
Applications
Support Outdated Drawing Specifications
Photography
Glare Reduction
Optical Signal Processing Instruments
Sensors
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, visibleColor
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
VISIBLE BBAR COATING
R ≤ .65% per surface, avg.
Ultra broad range, 400nm to 900nm
Corning Display Glass
Thin glass, excellent clarity
No residual birefringence
Imaging quality flatness
Thin substrates – .7mm, 1.1mm each
Refractive index – 1.50
OPTIONAL HEA BBAR COATING
R ≤ .65% per surface, avg.
Visible range, 425nm to 685nm
Acrylic
No residual birefringence
Cheapest option for laminated products
Digitally cut for all geometric shapes
Thin substrates – flexible
Refractive index – 1.49
Glass
BK-7 Transmission
Corning Eagle Glass Transmission
Coating
BBAR 400nm-900nm, BK-7 Coating Scan
HEA BBAR 425nm-685nm, Display Glass Coating Scan
商品属性 [Polarizer Range] 420nm – 760nm [Contrast Ratio] 2,500:1, nominal [Maximum Dimension] 1000mm x 620mm [Thickness] .190mm