This is a Plano-Convex lens, a type of spherical lens, sourced from Qioptiq Photonics. The lens has a base shape of a circle and a diameter of 25.4 mm. The thickness at the edge of the lens is 3.5 mm, while the thickness at the center is 4 mm. The effective focal length (EFL) of this lens is 300 mm, making it suitable for applications that require a long focal length.
The lens is made of N-BK7, a type of glass commonly used in optical applications due to its excellent optical properties. The inner radius of the lens is 0 mm, and the outer radius is also 0 mm, indicating that the lens is a simple plano-convex design.
The lens is coated with qio bbar arb2nirnbk7 on both the front and back surfaces. This coating is designed to enhance the lens's performance in the 725-1050 nm wavelength range.
Please note that the vendor, Qioptiq Photonics, lists this lens as being in stock on their website. For more information, you can refer to the provided weblink.