This is a 14BCX250-05-1 Double-Convex Lens, sourced from the reputable vendor, Standa. The lens boasts a 12.7 mm diameter and a focal length of 250mm, making it suitable for a wide range of optical applications. The lens is uncoated, which means it does not have any additional layers to alter or enhance its light transmission properties.
The lens's geometry is characterized by its double-convex shape, with a center thickness of 2mm and an edge thickness of 1.9mm. The inner and outer radii are 0, and the radii of curvature are 259.01mm for both the first and second surfaces. The lens is made of n-bk7 Schott material, a popular choice for its high refractive index and low dispersion.
The lens is designed to work with a wavelength of 546nm, making it suitable for applications that use this wavelength. The lens's shape is spherical, which is a common choice for its ease of manufacturing and versatility in various applications.