Features

Single and Dual Prism Front-Surface Beam Samplers

The Front-Surface Beam Sampler is available as either a single prism (PFSA) or dual orthogonal prism (DPFSA) unit. Reflection of the prism at the nominal incidence of 45° is polarization and wavelength dependent, with 532 nm s-polarization reflected at 8.27%, and p-polarization at 0.68% for PFSA. The DPFSA configuration results in polarization independent reflection of 0.057% at 532 nm.

Reflection at λ (nm) P- Polarization S- Polarization
 248.3 0.88% 9.40%
 351.1 0.75% 8.65%
 532 0.68% 8.27%
 1064 0.64% 8.01%

Other filters and attenuators can be attached using the C-mount female threads at the input end. The use of a right-angle prism to sample the incident beam guarantees that any scattered secondary beams do not interfere with the measurement.