This is a Plano-Convex Lens, a type of spherical lens, sourced from Standa. The lens has a base shape of a circle and is designed for use in a variety of optical systems. The lens is uncoated, which means it does not have any additional layers to enhance or alter its optical properties.
The lens has a diameter of 25.4 mm and a thickness at the edge of 2.7 mm. The thickness at the center of the lens is 3 mm. The effective focal length (EFL) of the lens is 750 mm, which is the distance over which the lens will focus parallel rays of light. The radius of curvature (R1) of the lens is 313.702 mm.
The lens is made from CAF2 (Calcium Fluoride) material, specifically the variant Mal-1963. This material is chosen for its optical properties, which include a high transmission rate in the ultraviolet and infrared regions of the spectrum. The wavelength of light that this lens is designed to work with is 2940 nm.
Please note that the links provided with the item data indicate that this lens is in stock and available for purchase. For more information, you can visit the vendor's website using the provided weblinks.