This is the PLCC-50.8-77.3-UV, a Plano-Concave Spherical Lens with a 50.8 mm diameter, sourced from CVI Laser Optics. The lens is designed for use with a wavelength of 588 nm and is made from UVFS material, specifically identified as "UVFS MAL-1965".
The lens's geometry is characterized by its center thickness of 4.5 mm, a focal length (EFL) of -150 mm, and a radius of curvature (R1) of -77.3 mm. The lens's base shape is circular, and it does not have any inner or outer radius specified.
The lens is uncoated, which means it does not have any additional layers to enhance its optical properties. Despite this, it is still classified as a laser-grade lens, indicating its high quality and suitability for use in laser applications.
The lens's status is "in stock" as of the last update, and more detailed information can be found in the provided weblink. This lens is a part of a larger catalog of spherical lenses available at 3DOptix.