This is the G063874000 25.4 mm Dia. N-BK7 Mounted Plano-Concave Lens, a high-quality optical component sourced from Qioptiq Photonics. The lens, which is currently in stock, is designed with a spherical shape and a base shape of a circle, making it suitable for a wide range of optical applications.
The lens has a diameter of 25.4 millimeters and a center thickness of 1.5 millimeters. It features an effective focal length (EFL) of -500 millimeters, indicating its concave nature. The inner and outer radii are both zero, suggesting a symmetrical curvature.
The lens is made from N-BK7, a popular optical glass known for its excellent optical properties. This material is identified by the vendor as "n-bk7 schott," implying it meets the specifications of the Schott glass brand.
The lens is designed to operate at a wavelength of 588 nanometers. It does not come with any coating, as indicated by the empty "coating" field in the item data. This means that the lens's surface reflects and transmits light according to its base material properties.