Experiments on the Porch Swing Bearing of Michelson Interferometer for Low Resolution FTIR

Figure 6

The stiffener clamps mounted to the spring strips decreased the tilt angle of the movable arm of the porch swing. The shaded area is the range of allowed tilt angle 𝛼≤14   μrad. The zero of the displacement was the equilibrium position of the spring elements. The error bars represent the maximum measurement error of the tilt angle. The maximum error of the mirror displacement was about ± 0.1 mm.