This is a 111-0250E Double-Convex Lens, sourced from EKSMA Optics, a renowned vendor in the optical components industry. The lens boasts a base shape of a circle and is designed for use in spherical lens applications. It is constructed from BK7 Schott, a high-quality optical glass known for its excellent transparency and low dispersion.
The lens has a diameter of 25.4 mm and a thickness at the edge of 3.8 mm, while the center thickness is 4 mm. The effective focal length (EFL) of this lens is 1000 mm. The first radius of curvature (R1) is 1036.8 mm, and the second radius of curvature (R2) is -1036.8 mm, indicating its double-convex nature. The lens does not have any coating, as indicated in the item data.
This lens is designed to operate at a wavelength of 546 nm. The inner and outer radii are both 0, indicating a simple, double-convex design.
Please note that the provided weblink is valid and indicates that the lens is in stock, making it readily available for your optical component needs.