A line of tabletop enclosures is designed for optical tables. These enclosures are intended to be lightweight, economical, and aesthetically pleasing solutions for applications where the workspace or the work being performed requires an environmentally controlled atmosphere. Each tabletop enclosure is constructed with an aluminum framework, durable acrylic sides, and a rigid composite roof. The enclosure is available in a variety of sizes ranging from 48 x 72 x 32 in. to 60 x 144 x 32 in. A choice of four colors is available: clear, amber, smoke-gray, or black. Side panels are designed to slide in order to provide easy access to the tabletop from either side.