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Beamsplitters: A Guide for Designers

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With the large variety of beamsplitters available, the designer needs to take many factors into consideration. This article and its illustrations will go a long way toward making the correct choice less of a risk. All curves show typical performance.

CVI Melles Griot

Plate beamsplitters Plate beamsplitters consist of a thin plate of optical crown glass with a different type of coating deposited on each side. The first surface is coated with an all-dielectric film having partial reflection properties over either the visible or the near-infrared spectrum. The benefit of this type of coating is that it has low absorption, typically 0.5 percent for a 50/50 splitter at 45°. The second surface has an antireflection coating optimized for 45°. The transmittance and reflectance curves shown in Figures 1 through 6 are for unpolarized inputs at an...Read full article

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