This product is a Plano-Concave Lens, offered by Laser Components, a renowned vendor in the optical industry. The lens is spherical in shape, with a base shape of a circle, and is designed for use with a wavelength of 248 nm.
The lens has a diameter of 10 mm and a center thickness of 2 mm. The effective focal length (EFL) is -20 mm, indicating that it is a diverging lens. The radius of curvature for the curved surface is -10.3 mm. The lens does not have any coatings, as indicated by the empty "coating" field in the item data.
The lens is made of UVFS material, specifically identified as "UVFS mal- 1965" in the item data. This material is suitable for use in ultraviolet applications. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties or protect it from environmental factors.
The item data also indicates that this lens is in stock and available for immediate purchase. Further information about this product, including detailed specifications and purchasing options, can be found on the vendor's website using the provided weblink.