Photocell incorporating a lightguide and matrix composed of such photocells

摘要

A photocell having an entry face for the light and a photosensitive element, as well as to a matrix composed of such photocells. A lightguide-forming element placed between the entry face and the photosensitive element of the photocell ensures optical coupling between the latter two components. It makes it possible to place on either side of the photosensitive element electronic components for reading and for controlling the photocell, while reducing the loss of light incident on the entry face corresponding to the rays which would strike these electronic components. This lightguide-forming element is composed of at least three dielectric materials having different respective optical refractive indices and placed within concentric volumes.