Cylindrical lenses are commonly used in changing the aspect ratio of an image and focusing incoming light to a line. Its single cylindrical surface focused the incoming light in a single direction resulting in a stretch image. These are ideal for circular laser productions through anamorphic beam shaping or laser line generation. They are available here with both negative (concave) and positive (convex) focal lengths.
Plano concave cylindrical lenses are utilized to enlarge light in single dimension. To separate input collimated light away from a line, negative (concave) cylindrical lenses are used. They are best for one-dimensional compression of images, laser line generation, and anamorphic beam shaping.