Many optical data communication applications are required to transmit or receive signals with an extremely high level of precision. To do so, they require optimum light efficiency, and the optical properties of molded caps are sometimes unable to meet this need.
Soldered caps consist of ready-made glass bodies with special optical properties, and they are permanently connected to a metal frame using a specialized solder glass. This method can be used to connect windows and lenses, with a range of different properties as well as additional optical coatings, to metal. The result of soldering a cap to a matching header is a hermetically sealed housing that provides long-term protection to sensitive components and ensures that optical signals are transmitted with precision.