Cylindrical Plano-convex Lens (BK7) 20×30mm 400mm Focal Length Uncoated
◦BK7 lenses are also available with three types of anti-reflection coatings, visible wavelength range, in the near-infrared range and in the infrared range.
◦Cylindrical lenses are often used in an optical system to change the shape and aspect ratio of the illumination light beam.
|Name||Cylindrical Plano-convex Lens (BK7) 20×30mm 400mm Focal Length Uncoated|
|Standard Coatings Available||No|
|A x B||20mm x 30mm|
|Refractive index n<sub>e</sub>||1.519|
|Clear aperture||Circle or ellipse inscribed in a rectangular of 90% of the dimension|
|Surface Quality (Scratch-Dig)||20-10|
|Wavelength range of Antireflection Coating||Uncoated|
|Focal length f||400mm|
|Edge thickness te||3.8mm|
|Center thickness tc||4mm|
|Back focal length fb||397.4mm|
|Radius of curvature r||207.6mm|