Plano Convex or Concave Square Cylindrical Cylinder Lens Cylinder Lenses are offered in both plano-concave and plano-convex configurations, they are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylinder Lenses are available with positive or negative focal lengths, they are used for the optics, lasers, medical science, electronics, tele-communication and others. 1. Cylindrical lens with its circumference surface polished. 2. Applicable for laser focusing into a line, changing beam shape into sheet-shape, or irradiating at a distance with elongated line 3. Focal length shortened by reducing the rod lense diameter compared to cylindrical lenses 4. Distortion-free, flexion-free, straight line gainable when projection was made at a distance, by precised process and polishing. 5. Suitable for collecting large sum of light into sensor by putting it right in front of line sensor