This is the PLCX-12.7-25.8-C, a Plano-Convex Laser Grade Spherical Lens offered by CVI Laser Optics. The lens has a diameter of 12.7 mm and a thickness of 1.2 mm at the edge, increasing to 2 mm at the center. The effective focal length (EFL) of this lens is 50 mm, making it suitable for a variety of applications.
The lens is made from N-BK7 Schott, a popular material for optical elements due to its excellent optical properties. This particular lens is uncoated, meaning it does not have any additional layers to enhance its performance or protect it from environmental factors.
The lens's geometry is defined by a radius of curvature of 25.8 mm on the curved side, with the other side being flat. The inner and outer radii are both 0, indicating that the lens does not have any additional curvature or chamfering.
The lens is designed to work with a wavelength of 546.1 nm, which is in the green part of the visible light spectrum. This makes it suitable for applications that use light in this range, such as laser systems or spectroscopy.