When integrated into specialised lenses, the beam splitter divides the incoming light into two paths: one beam illuminates the object, while the other is used for image capture. Thorlabs offers high-power, polarizing, beamsplitter cubes mounted in 30 mm cage system compatible housings with SM1-threaded ports. It enables uniform, shadow-free lighting by directing light along the same optical axis as the lens. Their extinction ratio is better than 1000:1, and they are recommended for use in pulsed laser systems and for purifying the polarization state in multimode lasers. S-polarized light is reflected at a 90° angle, while P-polarized light is transmitted. The beamsplitters consist of a pair of precision right angle prisms cemented.
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