This is the PLCX-25.4-87.4-UV, a Plano-Convex Spherical Lens, a product of CVI Laser Optics. The lens, with a diameter of 25.4 mm, is designed for use with a wavelength of 266 nm and is uncoated.
The lens's geometry is defined by its thickness at the edge, which is 3.07 mm, and its center thickness, which is 4 mm. The lens's effective focal length (EFL) is 175 mm, and its radius of curvature (R1) is 87.44 mm. The lens's inner and outer radii are both 0, indicating a plano surface on one side and a curved surface on the other.
The lens is made of UVFS material, specifically UVFS Mal-1965, which is a laser-grade material. This material is suitable for use in ultraviolet applications. The lens is uncoated, meaning it does not have any additional layers to enhance its optical properties or protect it from environmental factors.
The lens's catalog number is PLCX-25.4-87.4-UV, and it is currently in stock. The product's webpage provides a link to a comprehensive catalog of CVI Laser Optics' spherical lenses, which can be found at https://www.idexot.com/media/wysiwyg/cms-pages/pdf/2-Spherical_Lenses.pdf.