Newport MKS Pellicle Beam Sampler, 74.9 mm OD, 51.6 mm CA, Uncoated PBS-2

The PBS-2 Pellicle Beam Sampler is 74.9 mm in diameter by 12.7 mm housing with a 51.6 mm Clear Aperture. This uncoated pellicle yields an average reflectivity of 8% from 375–2400 nm. It is well suited for beam sampling applications requiring high transmission and low reflectance. Pellicle beams samplers are ultra-lightweight components that virtually eliminate multiple reflections commonly associated with thicker glass beamsplitters. Pellicles are manufactured by stretching a 5 µm thick polymer membrane (index=1.47 @ 550 nm) over a flat metal frame. The extreme thinness eliminates secondary reflections by making them coincident with the original beam. Multiple wavelength versatility is an added benefit of an ultra-thin reflective membrane.