This is a Plano-Convex Lens, a type of spherical lens, sourced from the reputable vendor Standa. The lens has a base shape of a circle and is designed for use in the visible light spectrum, specifically at a wavelength of 546 nm.
The lens has a diameter of 25.4 mm and a thickness that varies from 3 mm at the edge to 3 mm at the center. It has an effective focal length (EFL) of 10000 mm, making it suitable for applications that require long-focus lenses. The lens's radius of curvature is 5167 mm on the curved side, while the other side is plano, or flat.
The lens is made from N-BK7 Schott glass, a popular material for optical lenses due to its excellent optical properties and high Abbe number. This particular lens does not have any coating, which means it is uncoated. However, it's important to note that coating can be applied to enhance the lens's performance, such as improving its transmission or reducing reflection.
This lens is in stock and available for immediate purchase. For more information, you can refer to Standa's website at http://www.standaphotonics.com/lenses/plano-convex-lenses.php.