This is the PLCX-25.4-85.0-UV, a Plano-Convex Spherical Lens, 25.4 mm in diameter, sourced from CVI Laser Optics. This lens is designed for use with a wavelength of 266 nm and is made from UVFS material, specifically identified as "UVFS MAL-1965".
The lens geometry features an edge thickness of 3.05 mm and a center thickness of 4 mm. The effective focal length (EFL) is 170 mm, making it suitable for a variety of optical applications. The lens has a plano surface on one side and a convex surface on the other, with a radius of curvature of 84.95 mm. The inner and outer radii are both 0, indicating a uniform curvature.
The lens is uncoated, which means it does not have any additional layers to enhance its optical properties. However, it is still a high-quality, laser-grade lens, suitable for use in demanding applications. The lens is currently in stock and available for immediate purchase.
For more detailed specifications, please refer to the vendor's catalog, which can be found at this link: https://www.idexot.com/media/wysiwyg/cms-pages/pdf/2-Spherical_Lenses.pdf