What is optical beam splitter?

The coating of the front surface of the planar beamsplitter determines the fractional splitting ratio, the rear surface is wedge-shaped, and the AR coating is added to reduce ghosting and interference effects. The thin film beam splitter provides excellent wavefront transmission properties while eliminating beam offsets and ghosting. Thorlabs' cube beam splitters are available in both polarized and non-polarized modes. The membrane beam splitter and cube beam splitter can be pre-installed in cube mounts compatible lens tube and cage systems. The spectral properties of dichroic beamsplitters depend on the wavelength and are very useful in combining different colors of laser beams / beams.

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