An imaging device

摘要: A first substrate (2) carries an array (3) of imaging elements (4). An (5) lens (6) is provided with each element associated at least one (4) for concentrating light (L) travelling on a path between the and (6). electro-optic material (8) having electrically alterable refractive index in space defined second (7) arrays (3 5). Electrodes (8a,8b) are applying electrical potential across to adjust effective focal length The can thus be adjusted by or varying applied so that focus device not entirely dependent nature construction