This is a Plano-Convex lens, sourced from the renowned optical vendor, Edmund Optics. The lens, identified as 33-379-INK, is a spherical lens with a circular base shape and a diameter of 40.0mm. It has a thickness of 3.05mm at the edge, increasing to 5.0mm at the center, and an effective focal length (EFL) of 200.0mm.
The lens is made from the high-quality material, n-BK7 Schott, which is known for its excellent optical properties. The lens's front and back surfaces are coated with the EDM VISNIR0SP2002000 coating, designed for the visible (VIS) and near-infrared (NIR) spectrum, specifically between 400-1000nm. This coating enhances the lens's performance in these wavelength ranges.
The lens's inner and outer radii are 0mm, indicating a plano surface on one side and a curved surface on the other. The radius of curvature (R1) of the curved surface is 103.36mm, and the back focal length (BFL) is 196.7mm.
According to the vendor's website, this lens is currently in stock, making it readily available for your optical needs. The link to the product page is provided for your convenience.