This is the LPX-12.5-15.6-C, a 12.5 mm diameter, N-BK7 image grade plano-convex lens with a focal length of 30mm, offered by CVI Laser Optics. The lens is uncoated, providing a bare, unaltered glass surface.
The lens is spherical in shape, with a plano-convex base shape, meaning one side is flat (plano) and the other is curved (convex). The curvature of the convex side is defined by a radius of 15.6 mm. The lens's thickness at the edge is 2.7 mm, while at the center, it measures 4 mm.
The lens is made of N-BK7, a popular glass type in the optical industry due to its excellent optical properties. This particular lens is classified as "image grade," indicating it has been manufactured to meet high standards of image quality.
The lens is designed to work with a wavelength of 546.1 nm, a common wavelength in visible light spectrum applications. The catalog number for this lens is LPX-12.5-15.6-C, and it can be found on the CVI Laser Optics website. The link to the product page is valid and indicates the lens is in stock.