The round window has a regular circle. As a front-end protection window, the edges of the rules can meet the assembly requirements of most optical imaging systems. In order to meet the different applications, these round / circle windows can be made of different materials, such as: optical glasses, float glass, fused quartz glass, optical crystals and so on.
All of these custom made windows are desighed to be used in precision optical and laser systems. The circumference is ground and both edges are no-chips beveled. In additional, various optical coatings are avaliable.