This is a Plano-Concave Lens from Standa, a renowned vendor in the optical industry. The lens, identified as 14PCV250-05-3, has a base shape of Circular and is designed for Spherical geometry. It features a diameter of 12.7 mm and a thickness that varies from 2 mm at the edge to 1.8 mm at the center.
The lens has an effective focal length (EFL) of -250 mm, indicating its concave nature. The inner radius is 0, while the outer radius is also 0, suggesting a uniform curvature throughout. This lens is made of CAF2 (Calcium Fluoride) material with a Mal-1963 variant, optimized for a wavelength of 2940 nm.
The lens does not come with any coating, as indicated in the item data. However, it is in stock and available for immediate use. For more information about this lens and similar products, you can visit Standa's website at http://www.standaphotonics.com/lenses/plano-concave-lenses.php.