Apparatus for obtaining image signal using small-size lens array, and camera system using it

An image signal obtaining apparatus using a very small lens array and a camera system using the same are provided to configure a lens so as not be exposed to the outside and obtain a focused clear image with respect to all areas by using the plural very small lenses without using a single large lens. An image signal obtaining apparatus using a very small lens array includes plural camera cells comprising a very small lens(41) and an image obtaining device. In order to obtain an image of a subject, the camera cells are regularly arrayed. To prevent light applied to one camera cell from being applied to the other camera cell, each of the camera cells is divided by a partition(43). The image obtaining device(42) is a charge coupled device.