Motorized Laser Power Attenuators

Motorized variable attenuators for software-controlled laser power adjustment of linearly polarized beams. A zero-order half waveplate rotated by a motorized stage changes beam polarization before fixed thin film Brewster type polarizers, continuously varying the transmitted and reflected intensity without altering other beam parameters. Versions cover wavelengths from UV to near infrared for nanosecond and femtosecond lasers, supplied with controller, plus motorized two-wheel filter attenuators.