Analyse et tolérancement de systèmes ayant une lentille frontale à forme libre

Authors: Dallaire, Xavier
Advisor: Thibault, Simon
Abstract: In light of the new development of the production methods, free-form lens are used more frequently in optical design. However, their mathematical definitions as well as their specific shapes tend to make their tolerancing and reactions to perturbations hardly predictable. In consequence, the tools used by optical designers, like optical design programs, are not always able to help as they should. First, this document presents the recent developments and the theoretical concepts concerning these subjects. Thereafter, the analysis of a panomorph lens which has a free-form lens as a first surface reveals numbers of particular behavior showing relations between the field curvature and the footprint. Finally, a new tolerancing technique is presented. Using a perturbative analysis requiring a minimum of computing power, it is possible to reduce the allowed margins of error of certain variables while maximising the gain in image quality. This technique was particularly efficient in cases where the adjustment of the focus was spatially limited.
Document Type: Mémoire de maîtrise
Issue Date: 2013
Open Access Date: 19 April 2018
Grantor: Université Laval
Collection:Thèses et mémoires

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