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A cylindrical lens is designed to focus light into a line with its curved face. The faces of the lens are its different sections that focus the image into a line parallel to the intersection and a plane tangent to it. The lens carefully compresses the image in the direction perpendicular to this line. It leaves it unaltered in the direction parallel to the tangent plane. This cylindrical lens is kept in front of the illumination object to produce the light sheet that is further used in imaging.