The intent of this paper is to discuss the performance characteristics used in judging optical systems, identify the parameters frequently toleranced in optical systems, explain the sensitivity a parameter has on system performance, discuss the creation of a tolerance . The intent of this paper is to discuss the performance characteristics used in judging optical systems, identify the parameters frequently toleranced in optical systems, explain the sensitivity a parameter has on system performance, discuss the creation of a tolerance . Why are tolerances important? Why is it difficult? If you can tolerance effectively, then you can be a good designer, otherwise you can not. Allowable errors are called tolerances. What needs to be toleranced? Make list of parameters to tolerance, x1, x2, x3,. all of the things that will go. Optomechanical tolerancing is the process of analyzing and specifying acceptable limits for mechanical and optical components in a system so that the final product performs as intended. Prior to that he worked for 20+ years at PerkinElmer, formerly EG&G, as a Principal Optical Engineer dressed, in the design of illumination and nonsequential optical systems. It examines traditional approaches like finite difference (FD) and. Articles in this section will teach you how to use Ansys Zemax OpticStudio's built-in tolerancing tools. The tolerancing tools may be used to evaluate the manufacturability of a system and may be used to communicate with your manufacturer.