This part of IEC 62627, which is a Technical Specification, applies to passive optical devices (components). It provides the definitions which are commonly used in the generic specifications, performance standards and tests and measurement standards for passive optical devices (components) prepared by SC 86B. It has the following three types of terms and definitions: basic terms and definitions; component terms and definitions; performance parameter terms and definitions. The generic specifications for passive optical devices (components) are listed in Annex A.