Importance

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Abstract

A substrate (2) carries an array (3) of photosensitive elements (4) each having a given surface area (4a) capable of detecting light. An array (5) of lens elements (6) is provided over the photosensitive array (5) so that each lens element (6) is associated with a respective photosensitive element (4) for concentrating light incident on the lens element (6) onto the associated photosensitive element (4). The given lo surface area (4a) of each photosensitive element (4) is covered by an opaque layer (7) for preventing light from reaching the photosensitive element (4) and a respective light transmissive region (8) which is small in relation to the surface area (4a) of the photosensitive element (4) is provided in the opaque layer (7) over each photosensitive element (4) at or near the focal point (F) of the associated lens element (6) so that, for each photosensitive element (4), the majority of the given surface area (4a) is shielded from any incident light by the opaque layer (7) and the light transmissive region (8) defines within the given surface area (4a) of the photosensitive element (4) a surface portion (4b) for receiving light which is small in relation to the given surface area (4a).

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First Claim