Newport Model 45 Damped Optical Support Rods are the most sophisticated rods available for critical applications where acoustical and vibrational forces are a concern. These rods incorporate cylindrical masses constrained by damping layers, concentrated in the upper portion of the rod where they are most effective in dissipating vibrational energy. This construction is the result of extensive computer modeling, dynamic testing and structural analysis. Newport’s patented internal damping system provides unmatched vibrational immunity. Compared to the best alternative designs, Newport damped optical support rods exhibit 60% higher resonant frequency, 100% faster vibration decay and 160% better peak compliance. These 14 in. (356 mm) long rods mount to tables and breadboards with four bolts through a special ring base.