PARAMETER: Cylinder Lenses are typically used to focus incoming light to a line, or to change the aspect ratio of an image. Cylindrical Lenses have a single cylindrical surface that causes incoming light to be focused in only a single dimension, stretching the image. Cylinder Lenses are available with positive or negative focal lengths, ideal for laser line generation or anamorphic beam shaping to circularize laser outputs. Cylindrical lens Manufacturer:ChangChun BRD Optical co., Ltd Optical Cylindrical lens Specification Material Optical glass/ Fused silica/ sapphire   etc. Dimension 2mm~100mm Dimension   tolerance ±0.05mm~±0.1mm Length 2mm~200mm Surface   quality 60/40 40/20 20/10 Surface   accuracy λ/2~λ/10@632.8nm532nm Clear   Aperture >85% dig diameter Centration