High Contrast Linear Polarizer

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High Contrast Linear Polarizer

In response to the need for improved contrast in the near infrared region, Meadowlark Optics now offers a line of High Contrast Linear Polarizers. These polarizers are constructed by laminating dichroic glass polarizers between glass substrates to achieve improved wavefront performance and surface quality and have contrast ratios as high as 10,000:1. Custom wavelength ranges from 630 to 1580 nm with 60 to 80 nm bandpasses and sizes from 10 to 25 mm are available.

  • Very high contrast
  • High transmission
  • Absorptive dichroic glass

Specifications - High Contrast  Linear Polarizer
Substrate Material N-BK7
Polarizer Material Dichroic Glass
Transmitted Wavefront Distortion
(P-V @ 632.8 nm)
≤ λ/4
Surface Quality (scratch-dig) 40-20
Beam Deviation ≤ 3 arc-min
Reflectance (per surface,
at normal incidence)
≤ 0.5%
Storage Temperature -50˚C to +70˚C
Operating Temperature -50˚C to +70˚C
Laser Damage Threshold 1W/cm2, CW 200
mJ/cm2, 20 ns, visible
2 J/cm2, 20 ns, 1064 nm
Prolonged exposure to strong ultraviolet radiation may damage these polarizers.

 

Ordering Information - High Contrast Linear Polarizer
Clear
Aperture
in. [mm]
Thickness
± 0.020 in.
[±0.51 mm]
Diameter
± 0.005 in.
[± 0.13 mm]
Part Number
0.40
[10.2]
0.25
[6.35]
Ø1.00
[Ø25.4]
PPM-050-λ
0.70
[17.8]
0.35
[8.89]
Ø1.00
[Ø25.4]
PPM-100-λ
Customer specified wavelength range.

 

Learn More
White Paper:   Finding the Optimal Polarizer