Compare Model Drawings, CAD & Specs Availability Price
Fast Steering Mirror System, 1 in. Removable Mirrors, ER.1 Coating
In Stock
In Stock
Fast Steering Mirror System, 1 in. Removable Mirrors, ER.4 Coating
2 Weeks
2 Weeks
Fast Steering System, 1 in. Mirror Fixture
3 Weeks
3 Weeks


FSM vs. Galvanometers

Fast Steering Mirrors offer a more compact package with a unique flexure suspension design used to constrain the motion of the mirror, eliminating bearings with their associated stiction and wear common to XY galvanometers. FSMs eliminate the need to compensate for beam displacement and polarization rotation due to a second reflection. With higher optical performance than galvo scanners, FSMs have larger apertures, lower wavefront distortion, and a broader choice of mirror substrates and coatings. The rotational axes of an FSM intersect at a single pivot point, unlike dual XY galvos, eliminating the displacement jitter and the Pincushion Distortion.

Fast and Accurate Mirror Control

Four voice coil actuators provide fast, high-bandwidth rotation. Utilized in push-pull pairs, the actuators provide smooth, even torque to the mirror. An internal optical-based feedback loop is built into the FSM-300 head to provide position feedback with reference to the support frame for accurate and stable pointing and tracking. When used in combination with Newport’s OBP Series Laser Beam Position Sensing Detector, an FSM can quickly lock to the detector for rapid laser beam control and stabilization.

Field Replaceable Mirrors

Newport offers a standard FSM-300 with a 1” (25.4mm) diameter mirror. A wide range of replaceable 1” mirror assemblies allows the user to field replace the standard mirror with another mirror that best fits the specific application. These additional standard mirrors are available for different wavelength ranging from 250 - 1700 nm.

Versatile and Economical

The FSM is an economical option for widespread commercial use for applications such as laser beam stabilization, laser pointing, tracking, and image stabilization.

Easy Analog Interface

The FSM-CD300 controller provides a convenient interface between the user and the mirror, allowing analog control voltages to be applied and mirror position to be monitored. The controller incorporates independent gain and DC offset adjustments of both X and Y-axes. This enhancement significantly improves the system performance for Laser Pointing applications, requiring accurately controlled point-to-point movements.