Apparatus for reducing fringe interference of light created in an optical system of a laser spectroscopy system

An apparatus for reducing fringe interference of light created in an optical system of a laser spectroscopy system, the apparatus comprising:

• an electromagnetic actuator configured to generate, along a laser path, a physical translational vibration of an optical element of the optical system;
• a control device configured to control an amplitude and frequency of the physical translational vibration;
• and
• a cantilever body which is, at one end, attached to a base by a flexural pivot and at, another free end, coupled to the electromagnetic actuator, the optical element being arranged on the cantilever body;
• wherein the control device includes a controller which controls the amplitude of the physical translational vibration and a vibration sensor attached to the cantilever body which provides an actual vibration value to the controller;
• and
• wherein the optical element is arranged at a position between ends of the cantilever body at which a moment of inertia of the optical component around a pivot point is at least substantially equal to a moment of inertia of the cantilever body.