Damped Optical Post, Gear Rack, Mounting Base, 14 in. Height, 1.5 in. Diameter

Model 45 and 75 Damped Optical Support Rods are a sophisticated upgrade to the standard supports available in this series, designed for measurements sensitive to acoustic or similar vibrational forces. These rods feature cylindrical masses constrained by damping layers in the upper portions of the rod, located for the most effective dissipation of vibrational energy based on precise computer modeling and testing. Newport’s patented internal damping system provides the utmost vibrational immunity from the environment. Compared to the best alternative designs, Newport damped optical support rods exhibit 60% higher resonant frequency, 5X faster vibration decay and 160% better peak compliance. Both models are 14 in. (356 mm) in length and mount to tables and breadboards securely with four bolts. Model 75 has a nylon gear rack for rack-and-pinion control of mounted elements' elevation. The time-domain responses shown in the figure compare these rods with model 40, the standard steel rod in this family, with the same load at 240 Hz, corresponding to the first bending mode of a cantilevered beam.