Plano Concave Lens 50mm Diameter −80mm 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.
◦Our lenses are listed by outside diameter and focal length to assist your selection according to required specifications.
|Name||Plano Concave Lens 50mm Diameter −80mm Focal Length Uncoated|
|Standard Coatings Available||Yes|
|Refractive index n<sub>e</sub>||1.519|
|Clear aperture||90% of the diameter|
|Surface Quality (Scratch-Dig)||20-10|
|Wavelength range of Antireflection Coating||Uncoated|
|Focal length f||−80mm|
|Edge thickness te||11.4mm|
|Center thickness tc||3mm|
|Back focal length fb||−82.0mm|
|Radius of curvature r||41.52mm|