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.
Технические характеристики
- Wavelength Range 375-2400 nm
- Diameter 74.9 mm
- Material Polymer film membrane
- Damage Threshold 2 W/cm2 CW, 1 J/cm2 with 10 nsec pulses, typical
- Surface Flatness 1 fringe (1/2 wave) per inch
- Surface Quality 40-20 scratch-dig
- Thickness 5 m
- Thickness Tolerance ±0.06 fringes/mm
- Operating Temperature Range -40 to 70°C
- Clear Aperture 51.6 mm
- Durability Hygroscopic film, keep from high humidity
