Beamsplitters divide the incident radiation into transmitted and reflected components. The beamsplitters can be designed for different splitting ratios and non-normal angles of incidence.

Flat plate 50/50 beamsplitter		Partial reflector 30/70
Tave=50%, Rave=50%   (±5%) 450nm to 650nm, at 45° angle of incidence. Can be optimized for other angles		At zero angle of incidence Tave=70%, Rave=30%   (±5%) 450nm to 650nm Different splitting ratios available
Cube 70/30 beamsplitter		Beamsplitter on ZnSe, 85/15
For indices 1.46 to 1.78 Rave=70%, Tave=30%   (±5%) 450nm to 650nm		Tave=85%, Rave=15%   (±5%) 8µm to 11.5µm Can be applied to other substrates

Polarizers split an unpolarized beam of light into a transmitted "P" polarized component and a reflected "S" polarized component.

Polarizing beamsplitter cubes consist of two right angle 45° prisms that are permanently cemented together. The entrance and exit faces are coated with an antireflection coating, while the hypotenuse is coated with a dielectric multilayer stack.

Polarizing cube		Immersed polarizer at 57°
Extinction ratio: >1000:1 P-component: T>97% S-component: R>99.8%		Broadband polarizing beamsplitter P-component: T>98% S-component: R>99%

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