A first substrate (2) carries an array (3) of imaging elements (4). An array (5) of lens elements (6) is provided with each lens element (6) associated with at least one imaging element (4) for concentrating light (L) travelling on a light path between the imaging element (4) and the at least one lens...http://www.google.ca/patents/US5451766?utm_source=gb-gplus-sharePatent US5451766 - Imaging device containing an electrooptic material to adjust the effective focal length of a lens element
