Improved tolerancing for production yield anticipation of optical micro-modules for cameraphones

摘要

Tolerancing an optical design is vital when optical modules are produced in tens of millions. In these cases the production yield is all-important: it will decide if the product will be a success. While optical design softwares provide powerful tolerancing tools, to get an idea of what the production yield will be, we will have to go a step further. A way of taking this step consists in a tolerancing procedure that will use these tolerancing tools and a dedicated analysis software:1. A list of specifications that the lenses will have to fit into has to be established.2. A merit function that will calculate each of these specs will have to be written.3. For the tolerancing itself, a script will have to be used to write to an output file all these values for each lens created during tolerancing4. The analysis software will read the output file, make all the desired statistics and then give the production yield and other relevant informations (e.g. yield and behavior of any spec).