Beamsplitter cubes are constructed by cementing two right angle prisms together at their hypotenuses. They are supplied with a beamsplitter coating, applied to the hypotenuse of one of the prisms. The leg faces are uncoated, but can be AR coated upon request. Esco manufactures general beamsplitter cubes for use in the visible and UV spectra.
Transmitted beam is neither displaced or deflected
Reflected and transmitted beams travel identical optical path lengths
No ghost images
Less susceptible to mechanical stress than plates
R/T ratio dependent on the state of polarization
Designed for use with collimated beams
Contains cemented interface that may be susceptible to high power
Cemented interface may introduce undesired wavefront distortion in larger cubes
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