An optical interface means for non-permanent passive coupling of light between two optically transparent media comprises a support member (3), and at least one shaped body (6) of an optically transparent elastic material supported thereby and adapted to resiliently contact said solid medium or media,...http://www.google.ca/patents/US5164589?utm_source=gb-gplus-sharePatent US5164589 - Reusable optical interface for non-permanent passive light coupling
