An endoscope has a head and an outer tube joined to it. Received in the outer tube is an inner tube in which optical components are received. Light guides are guided in the interstice between the interior space and outer tube. A closure element made of transparent material, which closes off the distal...http://www.google.fr/patents/US6503196?utm_source=gb-gplus-shareBrevet US6503196 - Endoscope having a composite distal closure element
Endoscope having a composite distal closure element
