Precision Linear Polarizer, 50.8 mm, 30.5 mm Clear, 1100-1750 nm
Description
The 20LP-NIR Precision Linear Polarizers is constructed by laminating a polymer polarizing film between two high-precision glass or fused silica windows. Each window has a high-efficiency 1100 to 1750 nm broadband NIR antireflection coating. The assembly is mounted in a 2 inch (50.8 mm) diameter black anodized aluminum housing for protection and provides a 30.5 mm clear aperture. The transmission axis is clearly marked. The result is a linear polarizer with high transmission and low wavefront distortion that are easy to mount.
Technical Specs
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Diameter
50.8 mm
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Wavelength Range
1100-1750 nm
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Material
Grade A N-BK7
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Polarizing Material
Polymer film
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Extinction Ratio
1,000:1 minimum, 3,500:1 typical
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Damage Threshold
1 W/cm2 CW, 0.2 J/cm2 with 20 nsec pulses, visible, typical
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Reflectivity
Ravg <0.5 %, 1100-1750 nm
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Surface Quality
40-20 scratch-dig
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Clear Aperture
30.5 mm
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Diameter Tolerance
±0.13 mm
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Transmitted Beam Deviation
≤2 arc min
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Wavefront Distortion
≤ λ/2 at 632.8 nm over the clear aperture
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Unpolarized Transmission, Parallel Pair
H0 >18%
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Unpolarized Transmission, Single
TT >29%
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