An objective lens holding device has a lens holder supporting an objective lens and a parallel link. The lens holder is installed in a housing through the parallel link. The parallel link is provided with hinges, made of synthetic resin, that can be elastically distorted so as to shift the lens holder...http://www.google.fr/patents/US5453881?utm_source=gb-gplus-shareBrevet US5453881 - Objective lens holding device
