This is the PLCC-25.4-257.5-UV, a laser-grade plano-concave lens from CVI Laser Optics. The lens, which is uncoated, has a diameter of 25.4 mm and a center thickness of 4.3 mm. It is designed for use with a wavelength of 588 nm and features a focal length (EFL) of -500 mm, making it suitable for a variety of optical applications.
The lens is made from UVFS material, specifically identified as UVFS MAL-1965. This material is known for its high transmittance in the ultraviolet region, making it ideal for use in UV applications. The lens's geometry is spherical, with a concave surface that has a radius of curvature of -257.5 mm. The lens does not have any coating, which means that it does not have any additional layers to enhance its optical properties.
The lens is available from CVI Laser Optics and is currently in stock. More detailed information about the lens, including its specifications and performance characteristics, can be found in the product catalog provided by the vendor.