Thorlabs offers overhead shelving options for optical tables as well as instrumentation shelving designed to allow control boxes to be placed near the equipment they control while minimizing their footprint on the optical table surface. Additional accessories include a laser safety curtain systems, laminar flow enclosures, blackout curtain systems, a kinematic periscope system, enclosure systems, earthquake restraints, equipment for use with pneumatic vibration isolation systems for optical tables and optical breadboards, and magnetic sheets to cover steel breadboard holes.