These lenses have at least one surface which is acylindric and is optimized for finite conjugates configurations. Those lenses are useful for 1 axis imaging and fiber coupling of astigmatic source.
They can be made from different materials. Most frequently used so far are fused silica, BK7 and S-TIH53.
Acylindric lenses have similar advantages over cylindrical lenses as aspheric have over spherical lenses. Lenses are optimized to reduce different aberrations in order to achieve superior imaging or collimating performances. CONTACT US